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Sample records for blood pressure measurement

  1. Blood pressure measurement

    Science.gov (United States)

    Diastolic blood pressure; Systolic blood pressure; Blood pressure reading; Measuring blood pressure ... or your health care provider will wrap the blood pressure cuff snugly around your upper arm. The ...

  2. Automatic blood pressure measuring system (M092)

    Science.gov (United States)

    Nolte, R. W.

    1977-01-01

    The Blood Pressure Measuring System is described. It measures blood pressure by the noninvasive Korotkoff sound technique on a continual basis as physical stress is imposed during experiment M092, Lower Body Negative Pressure, and experiment M171, Metabolic Activity.

  3. Accuracy of the blood pressure measurement.

    Science.gov (United States)

    Rabbia, F; Del Colle, S; Testa, E; Naso, D; Veglio, F

    2006-08-01

    Blood pressure measurement is the cornerstone for the diagnosis, the treatment and the research on arterial hypertension, and all of the decisions about one of these single aspects may be dramatically influenced by the accuracy of the measurement. Over the past 20 years or so, the accuracy of the conventional Riva-Rocci/Korotkoff technique of blood pressure measurement has been questioned and efforts have been made to improve the technique with automated devices. In the same period, recognition of the phenomenon of white coat hypertension, whereby some individuals with an apparent increase in blood pressure have normal, or reduced, blood pressures when measurement is repeated away from the medical environment, has focused attention on methods of measurement that provide profiles of blood pressure behavior rather than relying on isolated measurements under circumstances that may in themselves influence the level of blood pressure recorded. These methodologies have included repeated measurements of blood pressure using the traditional technique, self-measurement of blood pressure in the home or work place, and ambulatory blood pressure measurement using innovative automated devices. The purpose of this review to serve as a source of practical information about the commonly used methods for blood pressure measurement: the traditional Riva-Rocci method and the automated methods. PMID:17016412

  4. Palpatory method of measuring diastolic blood pressure

    Directory of Open Access Journals (Sweden)

    Dinesh Sahu

    2010-01-01

    Conclusion: The palpatory method would be very useful where frequent blood pressure measurement are being done manually like in wards, in busy OPD, patient on treadmill and also whenever stethoscope is not available. The blood pressure can be measured in noisy environment too.

  5. Automatic blood pressure measuring system (M091)

    Science.gov (United States)

    1977-01-01

    The Leg Volume Measuring System is used to measure leg calf girth changes that occur during exposure to lower body negative pressure as a result of pooling of blood and other fluids in the lower extremities.

  6. Blood pressure

    Science.gov (United States)

    ... the walls of the arteries is called blood pressure. Blood pressure is measured both as the heart contracts, which ... as it relaxes, which is called diastole. Normal blood pressure is considered to be a systolic blood pressure ...

  7. Blood Pressure Measurement Guidelines for Physical Therapists

    OpenAIRE

    Frese, Ethel M; Fick, Ann; Sadowsky, H. Steven

    2011-01-01

    Vital sign measurement and assessment are important components of the review of systems in a physical therapy examination for individuals with and without documented cardiopulmonary disease. The measurement of blood pressure gives the therapist information regarding the patient's baseline cardiovascular status, response to exercise/activity, and guides exercise prescription. Accurate measurement of blood pressure is critical for making appropriate clinical decisions especially if physical the...

  8. Accurate, reproducible measurement of blood pressure.

    OpenAIRE

    Campbell, N. R.; Chockalingam, A; Fodor, J. G.; McKay, D. W.

    1990-01-01

    The diagnosis of mild hypertension and the treatment of hypertension require accurate measurement of blood pressure. Blood pressure readings are altered by various factors that influence the patient, the techniques used and the accuracy of the sphygmomanometer. The variability of readings can be reduced if informed patients prepare in advance by emptying their bladder and bowel, by avoiding over-the-counter vasoactive drugs the day of measurement and by avoiding exposure to cold, caffeine con...

  9. Noninvasive blood pressure measurement in large vessels

    International Nuclear Information System (INIS)

    Pulse pressure in the aorta was evaluated by the measurement of pulse wave velocity (PWV) and blood flow velocity (BFV). PWV reflects the elasticity of the vessel and was determined by a time-of-flight method. BFV was measured by analyzing the change of magnetization decay due to flow in multiecho experiments. If one neglects pulse wave reflections at vascular branch points and flow resistance due to blood viscosity, pulse pressure is proportional to PWV and BFV. Noninvasive MR imaging measurements were obtained in 12 patients, all of whom underwent correlative arterial catheterization. Values varied between 35 and 100 mm Hg. The results demonstrated a high correlation between the two methods

  10. Blood Pressure Measurement: Clinic, Home, Ambulatory, and Beyond

    OpenAIRE

    Drawz, Paul E; ABDALLA, MOHAMED; Rahman, Mahboob

    2012-01-01

    Blood pressure has traditionally been measured in the clinic setting using the auscultory method and a mercury sphygmomanometer. Technological advances have led to improvements in measuring clinic blood pressure and allowed for measuring blood pressures outside the clinic. This review outlines various methods for evaluating blood pressure and the clinical utility of each type of measurement. Home blood pressures and 24 hour ambulatory blood pressures have improved our ability to evaluate risk...

  11. Oscillometric blood pressure measurements: A signal analysis

    Science.gov (United States)

    Barbé, K.; Van Moer, W.; Lauwers, L.

    2010-07-01

    In this paper, the oscillometric waveform measured by automatic non-invasive blood pressure meters (NIBP) is analyzed by transforming the data from the time domain to the frequency domain. The signal's spectrum of the oscillometric waveform is in current literature badly understood or explored. The only known link between the oscillometric waveform and the blood pressure is the maximum of the oscillometry's envelope equalling the mean arterial pressure (MAP). This link is established under the assumption that the oscillometry is an AM-signal. Unfortunately, computing the MAP is difficult in practice due to the non-sinusoidal nature of the actual measured signals. In this paper, we construct the best AM-signal approximation of the oscillometry and explore its use to compute the MAP.

  12. Numerical simulation of noninvasive blood pressure measurement.

    Science.gov (United States)

    Hayashi, Satoru; Hayase, Toshiyuki; Shirai, Atsushi; Maruyama, Masaru

    2006-10-01

    In this paper, a simulation model based on the partially pressurized collapsible tube model for reproducing noninvasive blood pressure measurement is presented. The model consists of a collapsible tube, which models the pressurized part of the artery, rigid pipes connected to the collapsible tube, which model proximal and distal region far from the pressurized part, and the Windkessel model, which represents the capacitance and the resistance of the distal part of the circulation. The blood flow is simplified to a one-dimensional system. Collapse and expansion of the tube is represented by the change in the cross-sectional area of the tube considering the force balance acting on the tube membrane in the direction normal to the tube axis. They are solved using the Runge-Kutta method. This simple model can easily reproduce the oscillation of inner fluid and corresponding tube collapse typical for the Korotkoff sounds generated by the cuff pressure. The numerical result is compared with the experiment and shows good agreement. PMID:16995754

  13. How to measure blood pressure manually.

    Science.gov (United States)

    Rushton, Melanie; Smith, Joyce

    2016-01-20

    Rationale and key points This article aims to help nurses to measure blood pressure (BP) manually using an aneroid sphygmomanometer. ▶ BP measurement is an essential clinical skill, and nurses must be competent in performing this procedure and taking accurate readings. ▶ Nurses should be aware of manual BP measurement techniques and understand the patient and environmental factors that may result in inaccurate readings that could compromise patient care. ▶ Nurses should regularly undertake manual BP measurement to ensure they remain competent to perform the procedure. Reflective activity Clinical skills articles can help update your practice and ensure it remains evidence based. Apply this article to your practice. Reflect on and write a short account of: 1. How reading this article will change your practice. 2. Further learning needs to extend your professional development. Subscribers can upload their reflective accounts at: rcni.com/portfolio . PMID:26786460

  14. Hypertension (High Blood Pressure)

    Science.gov (United States)

    ... right away. continue How Do Doctors Measure Blood Pressure? Blood pressure readings are fast and painless. Blood pressure ... same age, height, and gender have lower blood pressure. Blood pressure between 90% and 95% of the normal ...

  15. Auscultatory versus oscillometric measurement of blood pressure in octogenarians

    DEFF Research Database (Denmark)

    Rosholm, Jens-Ulrik; Pedersen, Sidsel Arnspang; Matzen, Lars;

    2012-01-01

    Auscultatory measurement using a sphygmomanometer has been the predominant method for clinical estimation of blood pressure, but it is now rapidly being replaced by oscillometric measurement.......Auscultatory measurement using a sphygmomanometer has been the predominant method for clinical estimation of blood pressure, but it is now rapidly being replaced by oscillometric measurement....

  16. Auscultatory versus oscillometric measurement of blood pressure in octogenarians

    DEFF Research Database (Denmark)

    Pedersen, Sidsel Arnspang

    2012-01-01

    Abstract Background. Auscultatory measurement using a sphygmomanometer has been the predominant method for clinical estimation of blood pressure, but it is now rapidly being replaced by oscillometric measurement. Objective. To compare blood pressure by auscultatory and oscillometric measurements in...... patients 80 years. Method. 100 patients had blood pressure measured by auscultation with a sphygmomanometer and by an electronic device using the oscillometric method. For each patient the mean of two blood pressures with each method measured within 15 min were compared. Results. The mean age of...... participants was 85.8 years; 55.8% were women. The correlation coeffi cient for systolic blood pressure was 0.88 and for diastolic 0.79. Differences between auscultatory and oscillometric values were less than 10 mmHg in 70.6% of systolic blood pressures and in 83.2% for diastolic. Arrhythmia and hypertension...

  17. A new method of non-invasive blood pressure measurement

    Science.gov (United States)

    Gu, Liangling; Yang, Yongming; Yu, Chengbo; Guo, Qiaohui; Zhu, Gang

    2005-12-01

    Blood pressure reflects a person's health.It is proposed here that the method of detecting blood pressure may be the key to improving the precision of blood pressure measurements. The oscillometric blood pressure measurement technique is widely used in automatic blood pressure measurement instruments correctly. A method of blood pressure measurement by oscillometric method is first presented. In the oscillometric method, the basic principle of the "feature point" method and the "amplitude characteristic ratios" method is also explained and discussed here. A new method of blood pressure measurement, namely the coefficient difference comparative method, is proposed here,which is based on the feature point method and amplitude characteristic ratios method. The method is proved both effective and reliable through the analysis of many cases and clinical tests. Utilizing Visual C++, software for this new and novel method was developed and passed criterion simulation apparatus test. When applied in hospital situation, its error was +/-5%. It is concluded that the oscillometric blood pressure measurement method can provide better means of blood pressure measurements reference for doctors.

  18. A blood pressure measurement method based on synergetics theory

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    <正>The principle for blood pressure measurement using pulse transit time is introduced in this paper.And the math model of synergetics theory is studied in detail.The synergetics theory is applied in the analysis of blood pressure measurement data.The simulation results show that the application of synergetics theory is helpful to judge the normal blood pressure,and the accuracy is up to 80%.

  19. Signal quality measures for unsupervised blood pressure measurement

    International Nuclear Information System (INIS)

    Accurate systolic and diastolic pressure estimation, using automated blood pressure measurement, is difficult to achieve when the transduced signals are contaminated with noise or interference, such as movement artifact. This study presents an algorithm for automated signal quality assessment in blood pressure measurement by determining the feasibility of accurately detecting systolic and diastolic pressures when corrupted with various levels of movement artifact. The performance of the proposed algorithm is compared to a manually annotated reference scoring (RS). Based on visual representations and audible playback of Korotkoff sounds, the creation of the RS involved two experts identifying sections of the recorded sounds and annotating sections of noise contamination. The experts determined the systolic and diastolic pressure in 100 recorded Korotkoff sound recordings, using a simultaneous electrocardiograph as a reference signal. The recorded Korotkoff sounds were acquired from 25 healthy subjects (16 men and 9 women) with a total of four measurements per subject. Two of these measurements contained purposely induced noise artifact caused by subject movement. Morphological changes in the cuff pressure signal and the width of the Korotkoff pulse were extracted features which were believed to be correlated with the noise presence in the recorded Korotkoff sounds. Verification of reliable Korotkoff pulses was also performed using extracted features from the oscillometric waveform as recorded from the inflatable cuff. The time between an identified noise section and a verified Korotkoff pulse was the key feature used to determine the validity of possible systolic and diastolic pressures in noise contaminated Korotkoff sounds. The performance of the algorithm was assessed based on the ability to: verify if a signal was contaminated with any noise; the accuracy, sensitivity and specificity of this noise classification, and the systolic and diastolic pressure

  20. Blood pressure self-measurement in the obstetric waiting room

    DEFF Research Database (Denmark)

    Wagner, Stefan; Kamper, Christina H.; Toftegaard, Thomas Skjødeberg;

    2013-01-01

    Background: Pregnant diabetic patients are often required to self- measure their blood pressure in the waiting room before consulta- tion. Currently used blood pressure devices do not guarantee valid measurements when used unsupervised. This could lead to misdi- agnosis and treatment error. The aim...... of this study was to investigate current use of blood pressure self-measurement in the waiting room in order to identify challenges that could influence the resulting data quality. Also, we wanted to investigate the potential for addressing these challenges with e-health and telemedicine technology...... obtain a reliable blood pressure reading. Results: We found that the patients did not adhere to given instructions when performing blood pressure self-measurement in the waiting room. None of the 81 patients adhered to all six inves- tigated recommendations, while around a quarter adhered to five out of...

  1. [Comparison of invasive blood pressure measurement in the aorta with indirect oscillometric blood pressure measurement at the wrist and forearm].

    Science.gov (United States)

    Saul, F; Aristidou, Y; Klaus, D; Wiemeyer, A; Lösse, B

    1995-09-01

    Indirectly measured blood pressure at the wrist or upper arm was compared with directly measured values in the aortic arch during routinely performed diagnostic cardiac catheterization in 100 patients (31-80 years, mean 59.3 years, 60% males). The noninvasive measurements were carried out by oscillometric devices, NAiS Blood Pressure Watch for measurements at the wrist, and Hestia OZ80 at the upper arm. Systolic blood pressure measured at the wrist was 4.3 +/- 14.1 mm Hg, and the diastolic value 6.0 +/- 8.9 mm Hg higher than when measured at the aortic arch; the difference was significant in both cases. Correlation coefficients were 0.85 for systolic and 0.71 for diastolic blood pressure. In 16% of the patients the systolic blood pressure at the wrist differed more than +/- 20 mm Hg. The diastolic blood pressure at the wrist measured more than +/- 20 mm Hg higher than in the aorta in 5% of the patients. At the upper arm mean systolic values were not different to the aorta. The diastolic pressure was 9.3 +/- 9.8 mm Hg higher in the aorta than at the upper arm. To verify the accuracy of values measured with the NAiS Blood Pressure Watch compared with the standard technique at the upper arm, sequential measurements were made at wrist and ipsilateral upper arm in the same group of 100 patients. The systolic blood pressure at the left wrist was 3.4 +/- 13.3 mm Hg higher and the diastolic pressure 3.8 +/- 9.5 mm Hg lower than at the upper arm. Only 53% of systolic values lay within a range of +/- 10 mm Hg. The correspondence between wrist and upper arm values was better for diastolic blood pressure, the values differing by less than +/- 10 mm Hg in two-thirds of patients. Self-measurement of arterial blood pressure with an oscillometric device at the wrist can be recommended only in individual cases with a difference of simultaneously measured values at the upper arm of less than +/- 10 mm Hg for systolic and diastolic blood pressures. The standard method for indirectly

  2. Invasively Measured Aortic Systolic Blood Pressure and Office Systolic Blood Pressure in Cardiovascular Risk Assessment

    DEFF Research Database (Denmark)

    Laugesen, Esben; Knudsen, Søren T; Hansen, Klavs W;

    2016-01-01

    Aortic systolic blood pressure (BP) represents the hemodynamic cardiac and cerebral burden more directly than office systolic BP. Whether invasively measured aortic systolic BP confers additional prognostic value beyond office BP remains debated. In this study, office systolic BP and invasively...

  3. Automatic noninvasive measurement of systolic blood pressure using photoplethysmography

    Directory of Open Access Journals (Sweden)

    Glik Zehava

    2009-10-01

    Full Text Available Abstract Background Automatic measurement of arterial blood pressure is important, but the available commercial automatic blood pressure meters, mostly based on oscillometry, are of low accuracy. Methods In this study, we present a cuff-based technique for automatic measurement of systolic blood pressure, based on photoplethysmographic signals measured simultaneously in fingers of both hands. After inflating the pressure cuff to a level above systolic blood pressure in a relatively slow rate, it is slowly deflated. The cuff pressure for which the photoplethysmographic signal reappeared during the deflation of the pressure-cuff was taken as the systolic blood pressure. The algorithm for the detection of the photoplethysmographic signal involves: (1 determination of the time-segments in which the photoplethysmographic signal distal to the cuff is expected to appear, utilizing the photoplethysmographic signal in the free hand, and (2 discrimination between random fluctuations and photoplethysmographic pattern. The detected pulses in the time-segments were identified as photoplethysmographic pulses if they met two criteria, based on the pulse waveform and on the correlation between the signal in each segment and the signal in the two neighboring segments. Results Comparison of the photoplethysmographic-based automatic technique to sphygmomanometry, the reference standard, shows that the standard deviation of their differences was 3.7 mmHg. For subjects with systolic blood pressure above 130 mmHg the standard deviation was even lower, 2.9 mmHg. These values are much lower than the 8 mmHg value imposed by AAMI standard for automatic blood pressure meters. Conclusion The photoplethysmographic-based technique for automatic measurement of systolic blood pressure, and the algorithm which was presented in this study, seems to be accurate.

  4. Indirect measurement of arterial blood pressure: physiotherapists’ theoretical knowledge

    Directory of Open Access Journals (Sweden)

    Marcelle Morgana Vieira de Assis

    2003-12-01

    Full Text Available Blood pressure checking and its theoretical knowledge are crucial to obtain reliable data in clinical examination. Although it is considered a simple technique to be learned and applied, it is not fully dealt with at physiotherapy university courses. Therefore, a wide range of mistakes and misinterpretations are likely to threaten treatment quality. This work aims to evaluate the theory background of physiotherapists for blood pressure measurement. From June to October 2002, 55 physiotherapists answered a 20- question multiple-choice questionnaire on general knowledge related to concepts, anatomy and physiology, suitable equipment, indirect measurement, blood pressure values, mistakes and misinterpretation factors related to blood pressure measurement. The results disclose faulty theory concepts in the sample studied, indicating the need of deeper approach to this complex theme during course and ongoing updating of professionals.

  5. Blood-Pressure Measuring System Gives Accurate Graphic Output

    Science.gov (United States)

    1965-01-01

    The problem: To develop an instrument that will provide an external (indirect) measurement of arterial blood pressure in the form of an easily interpreted graphic trace that can be correlated with standard clinical blood-pressure measurements. From sphygmograms produced by conventional sphygmographs, it is very difficult to differentiate the systolic and diastolic blood-pressure pulses and to correlate these indices with the standard clinical values. It is nearly impossible to determine these indices when the subject is under physical or emotional stress. The solution: An electronic blood-pressure system, basically similar to conventional ausculatory sphygmomanometers, employing a standard occluding cuff, a gas-pressure source, and a gas-pressure regulator and valve. An electrical output transducer senses cuff pressure, and a microphone positioned on the brachial artery under the occluding cuff monitors the Korotkoff sounds from this artery. The output signals present the conventional systolic and diastolic indices in a clear, graphical display. The complete system also includes an electronic timer and cycle-control circuit.

  6. MEASUREMENTS OF THE BLOOD CAPILLARY PRESSURE AND ARTERIAL ELASTICITY

    Institute of Scientific and Technical Information of China (English)

    HuangMengcai; GuZhong; HangWenjing; ZhongQuan; TangFuyong

    1990-01-01

    Describe some new fully automatic instruments for the measurements of the blood capillary pressure (Pcap) and arterial elastic properties in human fingers using a photoelectric plethysmographic technique, With these instruments, the value of Pcap was in good agreement with those reported by other investigators, the arterial elastic properties in human fingers have been successfully measured. The measurements of Pcap and arterial elasticity are now required in clinics because they provide useful and important information for evaluating vascular haemodynamics.

  7. Occlusion cuff for routine measurement of digital blood pressure and blood flow

    DEFF Research Database (Denmark)

    Lassen, N A; Krähenbühl, B; Hirai, M

    1977-01-01

    A miniaturized blood pressure cuff made of plastic material and applicable to fingers and toes is described. The cuff was compared to rubber cuffs and to bladder-free cuffs. It was found to be more reliable than the former type and much easier to use than the latter type. It is recommended for us...... in conjunction with a mercury-in-Silastic strain gauge for routine measurement of digital blood pressure and blood flow in patients with arterial disease....

  8. Superiority of home blood pressure measurements over office measurements for testing antihypertensive drugs.

    Science.gov (United States)

    Vaur; Dubroca; Dutrey-Dupagne; Genès; Chatellier; Bouvier-d'Yvoire; Elkik; Ménard

    1998-04-01

    OBJECTIVE: To compare the effects on office blood pressure and home blood pressure of placebo and active drug administration. DESIGN: After a 2-week wash-out period, patients with mild-to-moderate hypertension entered a 2-week single-blind placebo period and then a 4-week double-blind period. Patients were randomly assigned to be administered either 2 mg trandolapril once daily or its placebo in a 2:1 proportion. Office blood pressure was measured by a physician at the end of each period, using a mercury sphygmomanometer (mean of three consecutive measurements). Home blood pressure was measured during the last week of each period according to standard procedure carefully taught to each patient by the physician. Compliance was checked by using electronic pill boxes. RESULTS: Data for 34 of the 44 patients who entered the study were eligible for analysis. Baseline systolic blood pressure/diastolic blood pressure were significantly (P = 0.0001/P = 0.0001) higher for office blood pressure (161/101 mmHg) than they were for home blood pressure (145/93 mmHg). There was no statistically significant difference between the placebo and active-treatment groups at baseline. During the single-blind period, blood pressures measured at the office and at home did not change significantly. Office blood pressure decreased by 2.7 +/- 10 mmHg for systolic blood pressure and by 0.5 +/- 4 mmHg for diastolic blood pressure whereas home blood pressure increased by 0.8 +/- 6 mmHg for systolic blood pressure and by 0.7 +/- 4 mmHg for diastolic blood pressure. During the double-blind period, office blood pressure fell significantly with trandolapril treatment (systolic by 10.2 +/- 12 mmHg, diastolic by 8.3 +/- 6 mmHg; P = 0.0005/0.0001, versus single-blind placebo period) but this decrease was not significantly different (P = 0.45/0.92) from the fall in members of the placebo group (systolic by 6.9 +/- 9 mmHg, diastolic by 8.0 +/-6 mmHg; P = 0.04/0.002, versus single-blind placebo period

  9. Measurement of digital blood pressure after local cooling

    DEFF Research Database (Denmark)

    Nielsen, S L; Lassen, N A

    1977-01-01

    A double-inlet plastic cuff was designed for local cooling and systolic blood pressure measurement on the middle phalanx of the fingers. With a tourniquet on the proximal phalanx of one finger, cooling for 5 min made the digital artery temperature equal the skin temperature. The difference between...... the systolic pressure in a control finger and in the cooled finger give the reopening pressure in the digital arteries. At 30, 25, 20, 15, and 10 degrees C, respectively the percent decrease of the finger pressure was 0.2 (0.2), 1.5 (2.5), 8.5 (3.7), 11.4 (3.4), and 15.3 (3.1) in normal young women...

  10. Body mass index and blood pressure measurement during pregnancy.

    LENUS (Irish Health Repository)

    Hogan, Jennifer L

    2012-02-01

    OBJECTIVE: The accurate measurement of blood pressure requires the use of a large cuff in subjects with a high mid-arm circumference (MAC). This prospective study examined the need for a large cuff during pregnancy and its correlation with maternal obesity. METHODS: Maternal body mass index (BMI), fat mass, and MAC were measured. RESULTS: Of 179 women studied, 15.6% were obese. With a BMI of level 1 obesity, 44% needed a large cuff and with a BMI of level 2 obesity 100% needed a large cuff. CONCLUSION: All women booking for antenatal care should have their MAC measured to avoid the overdiagnosis of pregnancy hypertension.

  11. A comparison of blood pressure measurements in newborns.

    LENUS (Irish Health Repository)

    O'Shea, Joyce

    2012-02-01

    Blood pressure monitoring is an essential component of neonatal intensive care. We compared invasive and noninvasive (Dinamap, Marquette, and Dash) recordings in newborns and also noninvasive values obtained from upper and lower limbs. Infants\\' blood pressure was recorded every 6 hours for 72 hours using three noninvasive devices and compared with invasive readings taken simultaneously. Twenty-five babies were enrolled in the study, with birth weights of 560 to 4500 g and gestation 24 + 1 to 40 + 5 weeks. Three hundred thirty-two recordings were obtained. Comparison between invasive and noninvasive readings revealed that all three noninvasive monitors overread mean blood pressure. There was no significant difference between the cuff recordings obtained from the upper or lower limbs. All three noninvasive devices overestimated mean blood pressure values compared with invasive monitoring. Clinicians may be falsely reassured by noninvasive monitoring. Mean blood pressure values obtained from the upper and lower limb are similar.

  12. Controlling your high blood pressure

    Science.gov (United States)

    ... that is healthy for you. Checking Your Blood Pressure Your blood pressure can be measured at many places, including: ... Alternative Names Controlling hypertension Images Taking your blood pressure at home Blood pressure check Low sodium diet References American Diabetes ...

  13. Context-aware patient guidance during blood pressure self-measurement

    DEFF Research Database (Denmark)

    Sandager, Puk; Lindahl, Camilla; Schlütter, Jacob Mørup;

    2013-01-01

    The importance of accurate measurement of blood pressure in the screening and management of hypertension during pregnancy is well established. Blood pressure levels can be measured manually by healthcare staff or by using a blood pressure self-measurement device, either at home or in the clinic. In...... blood pressure self-measurement process. Preliminary results indicate that such active and context-aware guidance leads to more reliable measurements by inhibiting non-adherent patient behavior...

  14. Relating external compressing pressure to mean arterial pressure in non-invasive blood pressure measurements.

    Science.gov (United States)

    Chin, K Y; Panerai, R B

    2015-01-01

    Arterial volume clamping uses external compression of an artery to provide continuous non-invasive measurement of arterial blood pressure. It has been assumed that mean arterial pressure (MAP) corresponds to the point where unloading leads to the maximum oscillation of the arterial wall as reflected by photoplethysmogram (PPG), an assumption that has been challenged. Five subjects were recruited for the study (three males, mean age (SD) = 32 (15) years). The PPG waveform was analysed to identify the relationship between the external compressing pressure, PPG pulse amplitude and MAP. Two separate tests were carried out at compression step intervals of 10 mmHg and 2 mmHg, respectively. No significant differences were found between the two tests. The bias between the compressing pressure and the MAP was -4.7 ± 5.63 mmHg (p < 0.001) showing a normal distribution. Further research is needed to identify optimal algorithms for estimation of MAP using PPG associated with arterial compression. PMID:25429784

  15. Blood pressure measurement: lessons learned from our ancestors.

    Science.gov (United States)

    Karamanou, Marianna; Papaioannou, Theodore G; Tsoucalas, Gregory; Tousoulis, Dimitris; Stefanadis, Christodoulos; Androutsos, George

    2015-01-01

    The profound observations of William Harvey (1578-1657), in blood circulation and the progress of physical science laid the foundation for the development of the Iatrophysical School that contributed to the evolution of clinical sphygmomanometry. The pioneer work of Reverend Stephen Hales (1677-1761) demonstrated the dynamics of the vascular system. One century later the French physician Jean-Léonard-Marie Poiseuille (1797-1867) invented a U-tube mercury manometer and in 1860 the physiologist Etienne- Jules Marey (1830-1904) devised the first portable sphygmograph for recording the pulse wave. The non-invasive techniques of blood pressure measurement were completed by Scipione Riva-Rocci (1896-1937) sphygmomanometer and the description of "Korotkov sounds" by the Russian surgeon Nikolai- Sergeyevich Korotkov (1874-1920). PMID:25341864

  16. Hypertension (High Blood Pressure)

    Science.gov (United States)

    ... blood pressure with the development of a practical method to measure it. Physicians began to note associations between hypertension and risk of heart failure, stroke, and kidney failure. Although scientists had yet to prove that lowering blood pressure ...

  17. Non Invasive Measurement of Systolic Blood Pressure in Rats: A Simple Technique

    OpenAIRE

    Maria Pauline; Avadhany, Sandhya T.; K.N. Maruthy

    2011-01-01

    Background: Non invasive, simple and economical instrument to measure blood pressure in r365-ats is important in cardiovascular research. Methods: Systolic blood pressure measuring instrument was fabricated using a tail cuff, photoplethysmograph, pressure transducer and PC with Biopac Software for recording. Tail cuff was used to occlude the tail artery, photoplethysmograph picked the blood flow pulses in the rat tail and the pressure transducer measured the cuff pressure and converted it int...

  18. Why some adult Canadians do not have blood pressure measured.

    Science.gov (United States)

    Amankwah, Ernest; Campbell, Norman R C; Maxwell, Colleen; Onysko, Jay; Quan, Hude

    2007-12-01

    Regular blood pressure (BP) measurements are required to identify people with hypertension and to optimally manage their cardiovascular risk. Analyses of data from the 2000-2001 Canadian Community Health Survey showed that most adult Canadians have had a BP assessment in the previous 2 years and few have never had one. Large numbers of persons without BP recordings were observed, however, among persons who were younger, were male, who did not have either a regular doctor or physician contact in the previous year, who were recent immigrants or visible minorities (nonwhite and non-Aboriginal), and who spoke neither French nor English. Common reasons reported for not having a BP assessment included believing it was not necessary and simply not getting around to it. Education programs targeting those at risk as well as more convenient BP screening may improve awareness and testing. PMID:18046100

  19. Sensitivity, specificity, and predictive values of a forearm blood pressure measurement method in severe obesity.

    Science.gov (United States)

    Leblanc, Marie-Ève; Cloutier, Lyne; Poirier, Paul

    2015-04-01

    For blood pressure assessment, it has been reported that forearm blood pressure measurement appears to be as valid as an upper-arm blood pressure measurement method in individuals with severe obesity when correlated to the intra-arterial method, considered as the gold standard. Sensitivity, specificity, and predictive values for the presence of systemic hypertension in 25 severely obese patients from 352 blood pressure measurements were calculated. The sensitivity (0.98) and the positive predictive value (0.93) for hypertension on forearm blood pressure measurements are excellent, indicating that the forearm approach is a promising alternative to systemic hypertension diagnosis in severe obesity. PMID:25757220

  20. ORANGE JUICE AND BLOOD PRESSURE

    OpenAIRE

    M. F. VALIM; Barros, S.

    2009-01-01

    Blood pressure is the force of blood against artery walls. It is measured in millimeters of mercury (mm Hg) and recorded as two numbers: systolic pressure (as the heart contracts) over diastolic pressure (as the heart relaxes between beats). High blood pressure (hypertension) is defined as chronically elevated high blood pressure, with systolic blood pressure (SBP) of 140 mm Hg or greater, and diastolic blood pressure (DBP) of 90 mm Hg or greater. High blood pressure ...

  1. Home monitoring of blood pressure

    OpenAIRE

    McGrath, Barry P

    2015-01-01

    Home blood pressure monitoring is the self-measurement of blood pressure by patients. In the diagnosis and management of high blood pressure it is complementary to 24-hour ambulatory blood pressure monitoring and clinic blood pressure measurements. Home monitoring can also help to identify white-coat and masked hypertension.

  2. Home blood pressure measurement : reproducibility and relationship with left ventricular mass

    NARCIS (Netherlands)

    Kok, R.H.; Beltman, F.W.; Terpstra, W.F.; Smit, A.J.; May, J.F.; de Graeff, P.A.; Meyboom-de Jong, B.

    1999-01-01

    OBJECTIVE: To evaluate the reproducibility and relationship with left ventricular mass index of home blood pressure in comparison with ambulatory and office blood pressures. METHODS: We measured home, ambulatory and office blood pressures of 84 previously untreated hypertensive patients, aged 60-74

  3. Measures of blood pressure and cognition in dialysis patients

    Science.gov (United States)

    There are few reports on the relationship of blood pressure with cognitive function in maintenance dialysis patients. The Cognition and Dialysis Study is an ongoing investigation of cognitive function and its risk factors in six Boston area hemodialysis units. In this analysis, we evaluated the rela...

  4. TREATMENT OF HYPERTENSION USING TELEMEDICAL HOME BLOOD PRESSURE MEASUREMENTS

    DEFF Research Database (Denmark)

    Hoffmann-Petersen, N; Lauritzen, T; Bech, J N;

    2015-01-01

    of the measurements and subsequent communication by telephone or E-mail. In the control group, patients received usual care. Primary outcome was reduction in daytime ambulatory blood pressure measurements (ABPM) from baseline to 3 months' follow-up. RESULTS: In both groups, daytime ABPM decreased significantly......: Participants (n = 356) were recruited from a prevalence study among citizens aged 55-64 years in the municipality of Holstebro, Denmark. The study was a randomised, controlled, unblinded 3 months trial. In the intervention group, antihypertensive treatment was based on TBPM with transmission....... The decrease in daytime ABPM in the intervention group was systolic/diastolic, -8  ± 12/-4 ± 7 mmHg. This did not differ significantly from the control group's -8 ± 13/-4 ± 8 mmHg. An equal number of participants obtained normal daytime ABPM, in the intervention group 17% (31/175) versus control 21% (37...

  5. Blood Pressure Quiz

    Science.gov (United States)

    ... page please turn Javascript on. Feature: High Blood Pressure Blood Pressure Quiz Past Issues / Fall 2011 Table of Contents ... About High Blood Pressure / Treatment: Types of Blood Pressure Medications / Blood Pressure Quiz Fall 2011 Issue: Volume 6 Number ...

  6. Blood pressure measurement in epidemiological investigations in teenagers

    International Nuclear Information System (INIS)

    Background: The use of sphygmomanometers may lead to problems in investigations on health of young people. The purpose of this paper is to present the validation of the blood pressure (BP) collected during the survey 'Youth Heart Health' in Hainaut by using second sample of young people in Hainaut for which BP was measured by a manual taking of tension and by an electronic device. Methods: Validation was done with a control sample of 343 young with five successive BP measures: twice with the mercury sphygmomanometer and three with DXL. We compared the manual and the electronic measures in order to study the correlation between the two methods. The control sample was used in order to compare the BP measurements with the results of the survey on the health of young people in Hainaut. Results: The differences between manual systolic BP and Dinamap measures are significant (differences in averages 3.6 mmHg; d.s. 7.8; 95% CI: 2.8-4.4 mmHg; p < 0.001) and the regression coefficient is -0.015. Diastolic BP is significantly higher with the manual method than with Dinamap (differences in means: 8.2 mmHg; d.s. 7.0; 95% CI: 7.4-8.9 mmHg; p < 0.001) and the coefficient of regression is 0.096. We observe a difference in BP between the general survey and the control group (10.3 mmHg for systolic manual control and of 10.9 mmHg for systolic electronic control; 3.3 mmHg for diastolic manual control and of 11.5 mmHg for diastolic electronic control). Conclusions: The values of BP of the 'Youth Heart Health' are significantly higher. These observations indicate the difficulties in the choice of the tool for measurements of BP in epidemiological investigations in the teenagers. In order to decrease skews of observations in the measurement of BP, it is recommended to use a valid electronic instrument. Dinamap XL is an instrument of choice in such studies of young people. Environmental and organisational factors may also explain the observed difference, which means that survey

  7. The applicability of home blood pressure measurement in clinical practice: A review of literature

    OpenAIRE

    Verberk, Willem J; Kroon, Abraham A.; Jongen-Vancraybex, Heidi A; Peter W de Leeuw

    2007-01-01

    Purpose To review the literature on home blood pressure measurement (HBPM), to examine its validity and applicability for clinical practice and to provide recommendations regarding HBPM assessment. Findings HBPM can eliminate the white coat effect and offers the possibility to obtain multiple measurements under standardized conditions, which increases knowledge of overall blood pressure value. Although it is not entirely capable of replacing ambulatory blood pressure measurement (ABPM), HBPM ...

  8. High Blood Pressure (Hypertension)

    Science.gov (United States)

    ... your doctor prescribes it, medicine. What Is Blood Pressure? Blood pressure is the force of blood flow inside ... Will I Know if I Have High Blood Pressure? High blood pressure is a silent problem — you won't ...

  9. Outcome-Driven Thresholds for Home Blood Pressure Measurement International Database of HOme blood pressure in relation to Cardiovascular Outcome

    OpenAIRE

    Niiranen, T. J.; Asayama, K.; Thijs, L; Johansson, J K; Ohkubo, T.; Kikuya, M; Boggia, J.; Hozawa, A.; Sandoya, E.; Stergiou, G. S.; Tsuji, I; Jula, A. M.; Imai, Y.; Staessen, J. A.

    2013-01-01

    The lack of outcome-driven operational thresholds limits the clinical application of home blood pressure (BP) measurement. Our objective was to determine an outcome-driven reference frame for home BP measurement. We measured home and clinic BP in 6470 participants (mean age, 59.3 years; 56.9% women; 22.4% on antihypertensive treatment) recruited in Ohasama, Japan (n=2520); Montevideo, Uruguay (n=399); Tsurugaya, Japan (n=811); Didima, Greece (n=665); and nationwide in Finland (n=2075). In mul...

  10. A simple method of blood pressure measurement in the pig using a neonatal cuff.

    Science.gov (United States)

    Chow, P K; Ng, T H; Heng, D; Mack, P O

    1999-01-01

    The pig is a commonly used large animal model in experimental studies. Few non-invasive techniques exist however for the measurement of blood pressure in the porcine model. This study evaluates the novel use of the easily available neonatal blood pressure cuff for measuring blood pressure in the pig. Six Yorkshire pigs were used for the study. Blood pressure measurements obtained by the application of neonatal blood pressure cuff (Hewlett Packard) around the base of the tail were compared with results obtained from intra-arterial measurements in the normotensive range as well as in experimentally created hypertensive (intravenous dopamine) and hypotensive (hypovolaemic shock) ranges. Results of the two techniques are closely correlated (Pearson's coefficient = 0.95, 0.97, 0.90). Systematic bias was however detected at the extremes of hypertensive and hypotensive blood pressure. Analysis of the limits of agreement (method of Bland and Altman) showed that neonatal blood pressure cuff measurements fall within--2 to 2.5 mmHg of the readings obtained from the invasive technique (95% confidence interval). The neonatal blood pressure cuff technique is a good substitute for the standard invasive intra-arterial measurement of blood pressure in the pig model. PMID:10374020

  11. Smartphone-based Continuous Blood Pressure Measurement Using Pulse Transit Time.

    Science.gov (United States)

    Gholamhosseini, Hamid; Meintjes, Andries; Baig, Mirza; Linden, Maria

    2016-01-01

    The increasing availability of low cost and easy to use personalized medical monitoring devices has opened the door for new and innovative methods of health monitoring to emerge. Cuff-less and continuous methods of measuring blood pressure are particularly attractive as blood pressure is one of the most important measurements of long term cardiovascular health. Current methods of noninvasive blood pressure measurement are based on inflation and deflation of a cuff with some effects on arteries where blood pressure is being measured. This inflation can also cause patient discomfort and alter the measurement results. In this work, a mobile application was developed to collate the PhotoPlethysmoGramm (PPG) waveform provided by a pulse oximeter and the electrocardiogram (ECG) for calculating the pulse transit time. This information is then indirectly related to the user's systolic blood pressure. The developed application successfully connects to the PPG and ECG monitoring devices using Bluetooth wireless connection and stores the data onto an online server. The pulse transit time is estimated in real time and the user's systolic blood pressure can be estimated after the system has been calibrated. The synchronization between the two devices was found to pose a challenge to this method of continuous blood pressure monitoring. However, the implemented continuous blood pressure monitoring system effectively serves as a proof of concept. This combined with the massive benefits that an accurate and robust continuous blood pressure monitoring system would provide indicates that it is certainly worthwhile to further develop this system. PMID:27225558

  12. Proportion and characteristics of patients who measure their blood pressure at home: Nationwide survey in Slovenia

    Directory of Open Access Journals (Sweden)

    Petek-Šter Marija

    2009-01-01

    Full Text Available Introduction. Home blood pressure monitoring has several advantages over blood pressure monitoring at a physician's office, and has become a useful instrument in the management of hypertension. Objective. To explore the rate and characteristics of patients who measure their blood pressure at home. Methods. A sample of 2,752 patients with diagnosis of essential arterial hypertension was selected from 12596 consecutive office visitors. Data of 2,639 patients was appropriate for analysis. The data concerning home blood pressure measurement and patients' characteristics were obtained from the patients' case histories. Results 1,835 (69.5% out of 2,639 patients measured their blood pressure at home. 1,284 (70.0% of home blood pressure patients had their own blood pressure measurement device. There were some important differences between these two groups: home blood pressure patients were more frequently male, of younger age, better educated, from urban area, mostly non-smokers, more likely to have diabetes mellitus and ischemic heart disease and had higher number of co-morbidities and were on other drugs beside antihypertensive medication. Using the logistic regression analysis we found that the most powerful predictors of home blood pressure monitoring had higher education level than primary school OR=1.80 (95% CI 1.37-2.37, non-smoking OR=2.16 (95% CI 1.40-3.33 and having a physician in urban area OR=1.32 (95% CI 1.02-1.71. Conclusion. Home blood pressure monitoring is popular in Slovenia. Patients who measured blood pressure at home were different from patients who did not. Younger age, higher education, non-smoking, having a physician in urban area and longer duration of hypertension were predictors of home blood pressure monitoring.

  13. Understanding Blood Pressure Readings

    Science.gov (United States)

    ... What is the AHA recommendation for healthy blood pressure? This blood pressure chart reflects categories defined by the American ... unusually low blood pressure readings. How is high blood pressure diagnosed? Your healthcare providers will want to get ...

  14. High Blood Pressure

    Science.gov (United States)

    ... Connected Home » High Blood Pressure Heath and Aging High Blood Pressure What Is Blood Pressure? Do ... high blood pressure increases as you get older. Gender. Before age 55, men have a greater chance ...

  15. Augmented blood pressure measurement through the noninvasive estimation of physiological arterial pressure variability

    International Nuclear Information System (INIS)

    Current noninvasive blood pressure (BP) measurement methods, such as the oscillometric method, estimate the systolic and diastolic blood pressure (SBP and DBP) at two random instants in time and do not take into account the natural variability in BP. The standard for automated BP devices sets a maximum allowable system error of ±5 mmHg, even though natural BP variability often exceeds these limits. This paper proposes a new approach using simultaneous recordings of the oscillometric and continuous arterial pulse waveforms to augment the conventional noninvasive measurement by providing (1) the mean SBP and DBP over the measurement interval and the associated confidence intervals of the mean, (2) the standard deviation of SBP and DBP over the measurement interval, which indicates the degree of fluctuation in BP and (3) an indicator as to whether or not the oscillometric reading is an outlier. Recordings with healthy subjects demonstrate the potential utility of this approach to characterize BP, to detect outlier measurements, and that it does not suffer from bias relative to the conventional oscillometric method. (paper)

  16. Non-invasive assessment of arterial stiffness using oscillometric blood pressure measurement

    OpenAIRE

    Komine Hidehiko; Asai Yoshiyuki; Yokoi Takashi; Yoshizawa Mutsuko

    2012-01-01

    Abstract Background Arterial stiffness is a major contributor to cardiovascular diseases. Because current methods of measuring arterial stiffness are technically demanding, the purpose of this study was to develop a simple method of evaluating arterial stiffness using oscillometric blood pressure measurement. Methods Blood pressure was conventionally measured in the left upper arm of 173 individuals using an inflatable cuff. Using the time series of occlusive cuff pressure and the amplitudes ...

  17. Measurement of blood pressure, ankle blood pressure and calculation of ankle brachial index in general practice

    DEFF Research Database (Denmark)

    Nexøe, Jørgen; Damsbo, Bent; Lund, Jens Otto;

    2012-01-01

    BACKGROUND: Low ankle brachial index (ABI) is a sensitive measure of 'burden' of atherosclerosis, indicating cardiovascular risk of the asymptomatic patient. Conventionally, ABI values......BACKGROUND: Low ankle brachial index (ABI) is a sensitive measure of 'burden' of atherosclerosis, indicating cardiovascular risk of the asymptomatic patient. Conventionally, ABI values...

  18. Blood Pressure Matters: Keep Hypertension in Check

    Science.gov (United States)

    ... cuff, or an automatic device may measure the pressure. Blood pressure is given as 2 numbers. The first ... described above. High Blood Pressure NIHSeniorHealth: High Blood Pressure High Blood Pressure and Kidney Disease Heart and Vascular Diseases ...

  19. Blood pressure measurement of all five fingers by strain gauge plethysmography

    DEFF Research Database (Denmark)

    Hirai, M; Nielsen, S L; Lassen, N A

    1976-01-01

    The aim of the present paper was to study the methodological problems involved in measuring systolic blood pressure in all five fingers by the strain gauge technique. In 24 normal subjects, blood pressure at the proximal phalanx of finger I and both at the proximal and the intermediate phalanx of...

  20. High Blood Pressure

    Science.gov (United States)

    ... pressure and should be taken seriously. Over time, consistently high blood pressure weakens and damages ... of landmark NIH blood pressure study confirm that lower blood pressure target can reduce ...

  1. Methodology and technology for peripheral and central blood pressure and blood pressure variability measurement: current status and future directions - Position statement of the European Society of Hypertension Working Group on blood pressure monitoring and cardiovascular variability.

    Science.gov (United States)

    Stergiou, George S; Parati, Gianfranco; Vlachopoulos, Charalambos; Achimastos, Apostolos; Andreadis, Emanouel; Asmar, Roland; Avolio, Alberto; Benetos, Athanase; Bilo, Grzegorz; Boubouchairopoulou, Nadia; Boutouyrie, Pierre; Castiglioni, Paolo; de la Sierra, Alejandro; Dolan, Eamon; Head, Geoffrey; Imai, Yutaka; Kario, Kazuomi; Kollias, Anastasios; Kotsis, Vasilis; Manios, Efstathios; McManus, Richard; Mengden, Thomas; Mihailidou, Anastasia; Myers, Martin; Niiranen, Teemu; Ochoa, Juan Eugenio; Ohkubo, Takayoshi; Omboni, Stefano; Padfield, Paul; Palatini, Paolo; Papaioannou, Theodore; Protogerou, Athanasios; Redon, Josep; Verdecchia, Paolo; Wang, Jiguang; Zanchetti, Alberto; Mancia, Giuseppe; O'Brien, Eoin

    2016-09-01

    Office blood pressure measurement has been the basis for hypertension evaluation for almost a century. However, the evaluation of blood pressure out of the office using ambulatory or self-home monitoring is now strongly recommended for the accurate diagnosis in many, if not all, cases with suspected hypertension. Moreover, there is evidence that the variability of blood pressure might offer prognostic information that is independent of the average blood pressure level. Recently, advancement in technology has provided noninvasive evaluation of central (aortic) blood pressure, which might have attributes that are additive to the conventional brachial blood pressure measurement. This position statement, developed by international experts, deals with key research and practical issues in regard to peripheral blood pressure measurement (office, home, and ambulatory), blood pressure variability, and central blood pressure measurement. The objective is to present current achievements, identify gaps in knowledge and issues concerning clinical application, and present relevant research questions and directions to investigators and manufacturers for future research and development (primary goal). PMID:27214089

  2. Does the Position or Contact Pressure of the Stethoscope Make Any Difference to Clinical Blood Pressure Measurements

    OpenAIRE

    Pan, Fan; Zheng, Dingchang; He, Peiyu; Murray, Alan

    2014-01-01

    Abstract This study aimed to investigate the effect of stethoscope position and contact pressure on auscultatory blood pressure (BP) measurement. Thirty healthy subjects were studied. Two identical stethoscopes (one under the cuff, the other outside the cuff) were used to simultaneously and digitally record 2 channels of Korotkoff sounds during linear cuff pressure deflation. For each subject, 3 measurements with different contact pressures (0, 50, and 100 mm Hg) on the stethoscope outside th...

  3. Evaluation of oscillometric and Doppler ultrasonic devices for blood pressure measurements in anesthetized and conscious dogs.

    Science.gov (United States)

    Vachon, Catherine; Belanger, Marie C; Burns, Patrick M

    2014-08-01

    Two non-invasive blood pressure (NIBP) devices (oscillometry and Doppler) were compared to invasive blood pressure using a Bland-Altman analysis, in anesthetized and conscious dogs. When considering the systolic arterial pressure only during general anesthesia, both NIBP devices slightly underestimated the systolic arterial blood pressure however the precision and the limits of agreement for the Doppler were of a greater magnitude. This indicates a worse clinical performance by the Doppler. The performance of both NIBP devices deteriorated as measured in conscious animals. In general, for the oscillometric device, determination of invasive diastolic and mean arterial pressures was better than the invasive systolic arterial pressure. Overall, the oscillometric device satisfied more of the criteria set by the American College of Veterinary Internal Medicine consensus statement. Based upon these results, the oscillometric device is more reliable than the Doppler in the determination of blood pressure in healthy medium to large breed dogs. PMID:24924217

  4. Medications and Blood Pressure

    Science.gov (United States)

    ... Blood Pressure Tools & Resources Stroke More Medications and Blood Pressure Updated:Jul 6,2016 When your blood pressure ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  5. Non Invasive Measurement of Systolic Blood Pressure in Rats: A Simple Technique

    Directory of Open Access Journals (Sweden)

    Maria Pauline

    2011-10-01

    Full Text Available Background: Non invasive, simple and economical instrument to measure blood pressure in r365-ats is important in cardiovascular research. Methods: Systolic blood pressure measuring instrument was fabricated using a tail cuff, photoplethysmograph, pressure transducer and PC with Biopac Software for recording. Tail cuff was used to occlude the tail artery, photoplethysmograph picked the blood flow pulses in the rat tail and the pressure transducer measured the cuff pressure and converted it into analog voltage. PPG signals were converted into voltage and amplified by the recording system with two channel amplifiers and in addition it also amplified analog voltage converted by the pressure transducer. Results: Calibration of the instrument entailed a simple Bland Altman’s plot of pressure recorded as voltage changes against pressure changes in the mercury sphygmomanometer which is considered as gold standard. A regression value of r=0.9 and p=0.00 was obtained. A pilot study was done on ten female rats. Three blood pressure readings were taken on two occasions. Between - animal variation of BP was 123±7 (mean SD, CV=5.9% and within - animal variation of BP was 120 ±7, CV=5.5%. Conclusion: The tail cuff and PPG based technique to measure systolic blood pressure in rats is simple, economic, accurate and reliable.

  6. A simple versatile method for measuring tail cuff systolic blood pressure in conscious rats.

    Science.gov (United States)

    Widdop, R E; Li, X C

    1997-09-01

    1. The non-invasive measurement of tail cuff systolic blood pressure in conscious rats is routinely used in long-term cardiovascular studies. There are a number of commercially available tail cuff systems, however, these apparatus are generally expensive and are dedicated for single-task operations. In the present study, a simple method for measuring systolic blood pressure, which requires only minor modifications to the existing hardware found in most cardiovascular laboratories, is described. 2. Systolic blood pressure measurements were made in the conventional manner by determining the systolic blood pressure which coincided with the restoration of the caudal artery pulse. This was achieved by using an inexpensive piezo-electric pulse transducer to detect the pulse, and this was coupled to a standard data-acquisition system (MacLab, ADInstruments) normally set up to record blood pressure. This method was compared with another established tail cuff method, as well as with direct intra-arterial recordings. 3. It was found that the results obtained using both tail cuff systems were in good agreement when systolic blood pressure was measured in Wistar-Kyoto rats and spontaneously hypertensive rats. In addition, systolic blood pressure was measured over 4 weeks in 2K1C rats and sham-operated rats, with both tail cuff methods producing similar results, which were not significantly different from direct intra-arterial recordings in the same animals. 4. Thus, in the present study, with only minor modifications, the same equipment was used for both direct and indirect determinations of systolic blood pressure. This situation differs from other conventional tail cuff systems since these items are designed for a single purpose. Therefore, the current method using piezo-electric sensor/MacLab-technology should be viewed as a relatively simple, flexible and cheap alternative method to measure tail cuff systolic blood pressure in conscious rats. PMID:9337632

  7. Correlation of Insulin Resistance with Anthropometric Measures and Blood Pressure in Adolescents

    Science.gov (United States)

    de Morais, Polyana Resende Silva; Sousa, Ana Luiza Lima; Jardim, Thiago de Souza Veiga; Nascente, Flávia Miquetichuc Nogueira; Mendonça, Karla Lorena; Povoa, Thaís Inácio Rolim; Carneiro, Carolina de Souza; Ferreira, Vanessa Roriz; de Souza, Weimar Kunz Sebba Barroso; Jardim, Paulo César Brandão Veiga

    2016-01-01

    Background Blood pressure is directly related to body mass index, and individuals with increased waist circumference have higher risk of developing hypertension, insulin resistance, and other metabolic changes, since adolescence. Objective to evaluate the correlation of blood pressure with insulin resistance, waist circumference and body mass index in adolescents. Methods Cross-section study on a representative sample of adolescent students. One group of adolescents with altered blood pressure detected by casual blood pressure and/or home blood pressure monitoring (blood pressure > 90th percentile) and one group of normotensive adolescents were studied. Body mass index, waist circumference were measured, and fasting glucose and plasma insulin levels were determined, using the HOMA-IR index to identify insulin resistance. Results A total of 162 adolescents (35 with normal blood pressure and 127 with altered blood pressure) were studied; 61% (n = 99) of them were boys and the mean age was 14.9 ± 1.62 years. Thirty-eight (23.5%) adolescents had altered HOMA-IR. The group with altered blood pressure had higher values of waist circumference, body mass index and HOMA-IR (p<0.05). Waist circumference was higher among boys in both groups (p<0.05) and girls with altered blood pressure had higher HOMA-IR than boys (p<0.05). There was a significant moderate correlation between body mass index and HOMA-IR in the group with altered blood pressure (ρ = 0.394; p < 0.001), and such correlation was stronger than in the normotensive group. There was also a significant moderate correlation between waist circumference and HOMA-IR in both groups (ρ = 0.345; p < 0.05). Logistic regression showed that HOMA-IR was as predictor of altered blood pressure (odds ratio - OR = 2.0; p = 0.001). Conclusion There was a significant association of insulin resistance with blood pressure and the impact of insulin resistance on blood pressure since childhood. The correlation and association between

  8. High blood pressure

    Science.gov (United States)

    ... you are at risk for: Bleeding from the aorta, the large blood vessel that supplies blood to ... tests Blood pressure check Blood pressure References American Diabetes Association. Standards of medical care in diabetes-2015 ...

  9. High Blood Pressure

    Science.gov (United States)

    ... normal blood pressure 140/90 or higher is high blood pressure Between 120 and 139 for the top number, ... prehypertension. Prehypertension means you may end up with high blood pressure, unless you take steps to prevent it. High ...

  10. High blood pressure - infants

    Science.gov (United States)

    National High Blood Pressure Education Program Working Group on High Blood Pressure in Children and Adolescents. The fourth report on the diagnosis, evaluation, and treatment of high blood pressure in children and adolescents. Pediatrics . ...

  11. High Blood Pressure Facts

    Science.gov (United States)

    ... Heart Disease Cholesterol Salt Million Hearts® WISEWOMAN High Blood Pressure Facts Recommend on Facebook Tweet Share Compartir ... facts about high blood pressure [PDF-255K] . High Blood Pressure in the United States About 70 million ...

  12. The measurement of digital systolic blood pressure by strain gauge technique

    DEFF Research Database (Denmark)

    Nielsen, P E; Bell, G; Lassen, N A

    1972-01-01

    The systolic blood pressure on the finger, toe, and ankle has been measured by a strain gauge technique in 10 normal subjects aged 17-31 years and 14 normal subjects aged 43-57 years. The standard deviation in repeated measurements lies between 2 and 6 mm Hg. The finger pressure in the younger...

  13. Non-invasive assessment of arterial stiffness using oscillometric blood pressure measurement

    Directory of Open Access Journals (Sweden)

    Komine Hidehiko

    2012-02-01

    Full Text Available Abstract Background Arterial stiffness is a major contributor to cardiovascular diseases. Because current methods of measuring arterial stiffness are technically demanding, the purpose of this study was to develop a simple method of evaluating arterial stiffness using oscillometric blood pressure measurement. Methods Blood pressure was conventionally measured in the left upper arm of 173 individuals using an inflatable cuff. Using the time series of occlusive cuff pressure and the amplitudes of pulse oscillations, we calculated local slopes of the curve between the decreasing cuff pressure and corresponding arterial volume. Whole pressure-volume curve was derived from numerical integration of the local slopes. The curve was fitted using an equation and we identified a numerical coefficient of the equation as an index of arterial stiffness (Arterial Pressure-volume Index, API. We also measured brachial-ankle (baPWV PWV and carotid-femoral (cfPWV PWV using a vascular testing device and compared the values with API. Furthermore, we assessed carotid arterial compliance using ultrasound images to compare with API. Results The slope of the calculated pressure-volume curve was steeper for compliant (low baPWV or cfPWV than stiff (high baPWV or cfPWV arteries. API was related to baPWV (r = -0.53, P r = -0.49, P r = 0.32, P Conclusions These results suggest that our method can simply and simultaneously evaluate arterial stiffness and blood pressure based on oscillometric measurements of blood pressure.

  14. Arterial blood pressure measurement and pulse wave analysis—their role in enhancing cardiovascular assessment

    International Nuclear Information System (INIS)

    The most common method of clinical measurement of arterial blood pressure is by means of the cuff sphygmomanometer. This instrument has provided fundamental quantitative information on arterial pressure in individual subjects and in populations and facilitated estimation of cardiovascular risk related to levels of blood pressure obtained from the brachial cuff. Although the measurement is taken in a peripheral limb, the values are generally assumed to reflect the pressure throughout the arterial tree in large conduit arteries. Since the arterial pressure pulse becomes modified as it travels away from the heart towards the periphery, this is generally true for mean and diastolic pressure, but not for systolic pressure, and so pulse pressure. The relationship between central and peripheral pulse pressure depends on propagation characteristics of arteries. Hence, while the sphygmomanometer gives values of two single points on the pressure wave (systolic and diastolic pressure), there is additional information that can be obtained from the time-varying pulse waveform that enables an improved quantification of the systolic load on the heart and other central organs. This topical review will assess techniques of pressure measurement that relate to the use of the cuff sphygmomanometer and to the non-invasive registration and analysis of the peripheral and central arterial pressure waveform. Improved assessment of cardiovascular function in relation to treatment and management of high blood pressure will result from future developments in the indirect measurement of arterial blood pressure that involve the conventional cuff sphygmomanometer with the addition of information derived from the peripheral arterial pulse. (topical review)

  15. Arterial blood pressure measurement and pulse wave analysis--their role in enhancing cardiovascular assessment.

    Science.gov (United States)

    Avolio, Alberto P; Butlin, Mark; Walsh, Andrew

    2010-01-01

    The most common method of clinical measurement of arterial blood pressure is by means of the cuff sphygmomanometer. This instrument has provided fundamental quantitative information on arterial pressure in individual subjects and in populations and facilitated estimation of cardiovascular risk related to levels of blood pressure obtained from the brachial cuff. Although the measurement is taken in a peripheral limb, the values are generally assumed to reflect the pressure throughout the arterial tree in large conduit arteries. Since the arterial pressure pulse becomes modified as it travels away from the heart towards the periphery, this is generally true for mean and diastolic pressure, but not for systolic pressure, and so pulse pressure. The relationship between central and peripheral pulse pressure depends on propagation characteristics of arteries. Hence, while the sphygmomanometer gives values of two single points on the pressure wave (systolic and diastolic pressure), there is additional information that can be obtained from the time-varying pulse waveform that enables an improved quantification of the systolic load on the heart and other central organs. This topical review will assess techniques of pressure measurement that relate to the use of the cuff sphygmomanometer and to the non-invasive registration and analysis of the peripheral and central arterial pressure waveform. Improved assessment of cardiovascular function in relation to treatment and management of high blood pressure will result from future developments in the indirect measurement of arterial blood pressure that involve the conventional cuff sphygmomanometer with the addition of information derived from the peripheral arterial pulse. PMID:19940350

  16. Aortic blood pressure measured via EIT: investigation of different measurement settings.

    Science.gov (United States)

    Braun, Fabian; Proença, Martin; Rapin, Michael; Lemay, Mathieu; Adler, Andy; Grychtol, Bartłomiej; Solà, Josep; Thiran, Jean-Philippe

    2015-06-01

    Electrical impedance tomography (EIT) allows the measurement of intra-thoracic impedance changes related to cardiovascular activity. As a safe and low-cost imaging modality, EIT is an appealing candidate for non-invasive and continuous haemodynamic monitoring. EIT has recently been shown to allow the assessment of aortic blood pressure via the estimation of the aortic pulse arrival time (PAT). However, finding the aortic signal within EIT image sequences is a challenging task: the signal has a small amplitude and is difficult to locate due to the small size of the aorta and the inherent low spatial resolution of EIT. In order to most reliably detect the aortic signal, our objective was to understand the effect of EIT measurement settings (electrode belt placement, reconstruction algorithm). This paper investigates the influence of three transversal belt placements and two commonly-used difference reconstruction algorithms (Gauss-Newton and GREIT) on the measurement of aortic signals in view of aortic blood pressure estimation via EIT. A magnetic resonance imaging based three-dimensional finite element model of the haemodynamic bio-impedance properties of the human thorax was created. Two simulation experiments were performed with the aim to (1) evaluate the timing error in aortic PAT estimation and (2) quantify the strength of the aortic signal in each pixel of the EIT image sequences. Both experiments reveal better performance for images reconstructed with Gauss-Newton (with a noise figure of 0.5 or above) and a belt placement at the height of the heart or higher. According to the noise-free scenarios simulated, the uncertainty in the analysis of the aortic EIT signal is expected to induce blood pressure errors of at least ± 1.4 mmHg. PMID:26007662

  17. Simultaneous Pulmonary and Systemic Blood Pressure and ECG Interval Measurement in Conscious, Freely Moving Rats

    OpenAIRE

    Rey, Markus; Weber, Edgar W; Hess, Patrick D

    2012-01-01

    Here we evaluated the ability of a new, dual blood-pressure telemetry transmitter to simultaneously measure pulmonary and systemic blood pressure and the electrocardiogram in rats. The transmitter was implanted in normotensive and monocrotaline-induced pulmonary hypertensive Wistar rats, with sensing catheters placed in the pulmonary artery (channel 1) and descending aorta (channel 2). Biopotential electrodes were positioned to record an apex-based lead II electrocardiogram. Pulmonary and sys...

  18. [Accuracy of the oscillometric method to measure blood pressure in children

    Science.gov (United States)

    Rego Filho, E A; Mello, S F; Silva, C R; Vituri, D W; Bazoni, E; Gordan, L N

    1999-01-01

    OBJECTIVE: The aim of this study is to analyze the substitution of the standard auscultatory method by the oscillometric blood pressure monitor, independently of the validity of the intraarterial blood pressure measurement. The accuracy of the automatic oscillometric monitor was compared to the auscultatory mercury manometer blood pressure measurement in apparently healthy school age children. METHODS: A device able to perform 3 simultaneous readings are used: one reading by the monitor and the others by two "blind" observers. We studied 72 school age children with the following characteristics: mean age 9.5 (6.1-16.1) and 39 males (54.2%). RESULTS: The difference for the systolic and diastolic blood pressure obtained by the monitor was in average + 6.2 mmHg and + 10.0 mmHg, respectively, when compared to the observer's readings. There was neither a good correlation nor a good agreement between the two observers and the monitor in the blood pressure determination. CONCLUSIONS: We concluded that the substitution of the standard auscultatory method for the non-invasive oscillometric method to measure blood pressure in school age children can not be generally recommended. PMID:14685547

  19. Respiratory modulation of oscillometric cuff pressure pulses and Korotkoff sounds during clinical blood pressure measurement in healthy adults

    OpenAIRE

    Chen, Diliang; Chen, Fei; Murray, Alan; Zheng, Dingchang

    2016-01-01

    Background Accurate blood pressure (BP) measurement depends on the reliability of oscillometric cuff pressure pulses (OscP) and Korotkoff sounds (KorS) for automated oscillometric and manual techniques. It has been widely accepted that respiration is one of the main factors affecting BP measurement. However, little is known about how respiration affects the signals from which BP measurement is obtained. The aim was to quantify the modulation effect of respiration on oscillometric pulses and K...

  20. Should blood pressure be measured with the cuff on a bare arm?

    NARCIS (Netherlands)

    Thien, T.; Keltjens, E.B.; Lenders, J.W.M.; Deinum, J.

    2015-01-01

    OBJECTIVE: To establish whether the results of blood pressure (BP) measurements are affected by wearing clothing underneath the BP cuff during measurement. METHODS: Normotensive and hypertensive patients (n=133; 65 men) of an outpatient clinic participated in this study. BP was measured according to

  1. Exploration of nurses' knowledge regarding correct way of blood pressure measurement

    Directory of Open Access Journals (Sweden)

    Paraskeui Gourni

    2011-01-01

    Full Text Available Blood pressure (BP measurement by the use of sphygmomanometer and auscultation of brachial artery by stethoscope is the most widespread way of measurement in daily clinical practice. The aim of the present study was to explore nurses' knowledge regarding correct way of measurement of blood pressure by the use of a sphygmomanometer. Method and material: The sample –studied consisted of individuals from all levels of nursing personnel. Data were collected by the use the completion of a specially designed questionnaire which apart from demographic variables, it included items concerning knowledge about the correct way of blood pressure measurement. Results: From the 360 participants, 88% (316 were women, while the mean age of the sample-studied was 36,1 years old. 51,4% of the sample-studied was of tertiary education. In terms of the knowledge of participants, 79,6% knew the correct preparation, 98,6% knew that arm position for blood pressure measurement should be on a pillow or a side table and the 94,8% knew the back should be supported on a chair back. 60,9% of the sample-studied knew that at first time, blood pressure (BP should be measured in both arms, while 45,9% didn't know that BP should be measured in arm with higher measurement. 78,2% of the participants knew that the correct measurement includes the use of sphygmomanometer and auscultation of brachial artery by stethoscope. 67,9% knew that body and arm position should be in ankle of 45o degrees and that the cuff should be placed around the upper arm at the same vertical height as the heart. 59,8% knew that the cuff should be placed 2-3 cm above the point of auscultation of brachial artery. 45,1% considered that the arm cuff should be inflated manually until when the height of the column of mercury approaches 200 mmHg. 52,3% knew the correct rhythm (2-3 mmHg/sec that the pressure in the cuff should be released. 88,4% knew the sounds corresponding to the measurement of Systolic blood

  2. Prognostic significance of distal blood pressure measurements in patients with severe ischaemia

    DEFF Research Database (Denmark)

    Paaske, William; Tønnesen, K H

    1980-01-01

    The clinical course was followed and the ankle and toe blood pressures were measured with the strain gauge technique on 5 occasions during 2 years in 43 patients with pain at rest and/or ischaemic ulceration due to severe ischaemia of the legs on the basis of occlusive arterial disease. Although...... arteriosclerosis of the legs in non-diabetic patients is generally considered a benign disease from the standpoint of limb survival, the critical level of TPI (systolic toe blood pressure/systolic arm blood pressure) was found to be 0.07 as a TPI below this value was associated with an overall 82% risk of...... amputation. With TPI above 0.07, the chance of successful conservative therapy was about 40%. Diabetics with severe ischaemia must be regarded as a high risk group in respect of amputation (64%) and lethality (64%). A variance analysis was made on the pressure data: In patients with low pressure peripheral...

  3. The applicability of home blood pressure measurement in clinical practice: A review of literature

    Directory of Open Access Journals (Sweden)

    Willem J Verberk

    2008-01-01

    Full Text Available Willem J Verberk, Abraham A Kroon, Heidi A Jongen-Vancraybex, Peter W de LeeuwUniversity Hospital Maastricht, Department of Internal Medicine and Cardiovascular Research Institute Maastricht (CARIM, Maastricht University, The NetherlandsPurpose: To review the literature on home blood pressure measurement (HBPM, to examine its validity and applicability for clinical practice and to provide recommendations regarding HBPM assessment.Findings: HBPM can eliminate the white coat effect and offers the possibility to obtain multiple measurements under standardized conditions, which increases knowledge of overall blood pressure value. Although it is not entirely capable of replacing ambulatory blood pressure measurement (ABPM, HBPM correlates better with target organ damage and cardiovascular mortality than office blood pressure measurement (OBPM, it enables prediction of sustained hypertension in patients with borderline hypertension, and proves to be an appropriate tool for assessing drug efficacy. Additional advantages of HBPM are that it may increase drug compliance and patient’s awareness of hypertension. Overall, OBPM yield higher blood pressure values than HBPM. Differences between OBPM and HBPM tend to increase with age and are generally higher in patients without antihypertensive treatment than in patients with antihypertensive treatment.Recommendations: Measurements should be performed according to accepted guidelines and recordings should be performed with a memory equipped automatic validated device. From the data reviewed here, we recommend that HBPM be assessed monthly by taking two measurements in the morning within 1 hour after awakening and two in the evening for three consecutive days, the data from the first day should be dismissed. A subject should be labeled hypertensive if his/her HBPM value is equal to or greater than 137 mmHg systolic and/or 84 mmHg diastolic.Keywords: blood pressure, hypertension, self-measurement, home

  4. Reliable blood pressure self-measurement in the obstetric waiting room

    DEFF Research Database (Denmark)

    Wagner, Stefan; Kamper, C. H.; Rasmussen, Niels H;

    2014-01-01

    Background: Patients often fail to adhere to clinical recommendations when using current blood pressure self-measurement (BPSM) methods and equipment. As existing BPSM equipment is not able to detect non-adherent behavior, this could result in misdiagnosis and treatment error. To overcome this...... patients scheduled for self-measuring their blood pressure (BP) in the waiting room at an obstetrics department's outpatient clinic to perform an additional BPSM using ValidAid. We then compared the automatically measured and classified values from ValidAid with our manual observations. Results: We found...

  5. Non-invasive measurement of the blood pressure pulse using multiple PPGs

    Science.gov (United States)

    Seymour, John; Pennington, Gary

    Heart disease, the leading cause of death in the US, may be spotted early on by looking at photoplethysmogram (PPG) data. This experiment explores a new method of continuously monitoring the blood pressure pulse with PPG data. In contrast to the traditional sphygmomanometer (cuff) method, which yields only the systolic and diastolic pressure during measurement, this method tracks the blood pressure pulse wave in a non-invasive continuous manner. This procedure allows for fast, inexpensive, and detailed analysis of the patient's blood pressure implementable on a large scale. We also explore the second derivative of the PPG data. In combination with the above method, the patient's heart risk can be effectively detected. We acknowledge Fisher Endowment Grant support from the Jess and Mildred Fisher College of Science and Mathematics, Towson University.

  6. Comparison of three measures of the ankle-brachial blood pressure index in a general population

    OpenAIRE

    Pan, Cheng-Rui; Staessen, Jan A.; Li, Yan; Wang, Ji-Guang

    2007-01-01

    The ankle-brachial blood pressure index (ABI) predicts cardiovasular disease. To our knowledge, no study has compared manual ABI measurements with an automated electronic oscillometric method in a population sample. We enrolled 946 residents (50.8% women; mean age, 43.5 years) from 8 villages in JingNing County, Zhejiang Province, P.R. China. We computed ABI as the ratio of ankle-to-arm systolic blood pressures from consecutive auscultatory or Doppler measurements at the posterior tibial and ...

  7. Oscillometric measurement of systolic and diastolic blood pressures validated in a physiologic mathematical model

    Directory of Open Access Journals (Sweden)

    Babbs Charles F

    2012-08-01

    Full Text Available Abstract Background The oscillometric method of measuring blood pressure with an automated cuff yields valid estimates of mean pressure but questionable estimates of systolic and diastolic pressures. Existing algorithms are sensitive to differences in pulse pressure and artery stiffness. Some are closely guarded trade secrets. Accurate extraction of systolic and diastolic pressures from the envelope of cuff pressure oscillations remains an open problem in biomedical engineering. Methods A new analysis of relevant anatomy, physiology and physics reveals the mechanisms underlying the production of cuff pressure oscillations as well as a way to extract systolic and diastolic pressures from the envelope of oscillations in any individual subject. Stiffness characteristics of the compressed artery segment can be extracted from the envelope shape to create an individualized mathematical model. The model is tested with a matrix of possible systolic and diastolic pressure values, and the minimum least squares difference between observed and predicted envelope functions indicates the best fit choices of systolic and diastolic pressure within the test matrix. Results The model reproduces realistic cuff pressure oscillations. The regression procedure extracts systolic and diastolic pressures accurately in the face of varying pulse pressure and arterial stiffness. The root mean squared error in extracted systolic and diastolic pressures over a range of challenging test scenarios is 0.3 mmHg. Conclusions A new algorithm based on physics and physiology allows accurate extraction of systolic and diastolic pressures from cuff pressure oscillations in a way that can be validated, criticized, and updated in the public domain.

  8. Long-term Blood Pressure Measurement in Freely Moving Mice Using Telemetry.

    Science.gov (United States)

    Alam, Mohammad Afaque; Parks, Cory; Mancarella, Salvatore

    2016-01-01

    During the development of new vasoactive agents, arterial blood pressure monitoring is crucial for evaluating the efficacy of the new proposed drugs. Indeed, research focusing on the discovery of new potential therapeutic targets using genetically altered mice requires a reliable, long-term assessment of the systemic arterial pressure variation. Currently, the gold standard for obtaining long-term measurements of blood pressure in ambulatory mice uses implantable radio-transmitters, which require artery cannulation. This technique eliminates the need for tethering, restraining, or anesthetizing the animals which introduce stress and artifacts during data sampling. However, arterial blood pressure monitoring in mice via catheterization can be rather challenging due to the small size of the arteries. Here we present a step-by-step guide to illustrate the crucial key passages for a successful subcutaneous implantation of radio-transmitters and carotid artery cannulation in mice. We also include examples of long-term blood pressure activity taken from freely moving mice after a period of post-surgery recovery. Following this procedure will allow reliable direct blood pressure recordings from multiple animals simultaneously. PMID:27286041

  9. Blood Pressure Drop Prediction by using HRV Measurements in Orthostatic Hypotension.

    Science.gov (United States)

    Sannino, Giovanna; Melillo, Paolo; Stranges, Saverio; De Pietro, Giuseppe; Pecchia, Leandro

    2015-11-01

    Orthostatic Hypotension is defined as a reduction of systolic and diastolic blood pressure within 3 minutes of standing, and may cause dizziness and loss of balance. Orthostatic Hypotension has been considered an important risk factor for falls since 1960. This paper presents a model to predict the systolic blood pressure drop due to orthostatic hypotension, relying on heart rate variability measurements extracted from 5 minute ECGs recorded before standing. This model was developed and validated with the leave-one-out cross-validation technique involving 10 healthy subjects, and finally tested with an additional 5 healthy subjects, whose data were not used during the training and cross-validation process. The results show that the model predicts correctly the systolic blood pressure drop in 80 % of all experiments, with an error rate below the measurement error of a sphygmomanometer digital device. PMID:26345451

  10. An Investigation of Pulse Transit Time as a Non-Invasive Blood Pressure Measurement Method

    Science.gov (United States)

    McCarthy, B. M.; O'Flynn, B.; Mathewson, A.

    2011-08-01

    The objective of this paper is to examine the Pulse Transit Method (PTT) as a non-invasive means to track Blood Pressure over a short period of time. PTT was measured as the time it takes for an ECG R-wave to propagate to the finger, where it is detected by a photoplethysmograph sensor. The PTT method is ideal for continuous 24-hour Blood Pressure Measurement (BPM) since it is both cuff-less and non-invasive and therefore comfortable and unobtrusive for the patient. Other techniques, such as the oscillometric method, have shown to be accurate and reliable but require a cuff for operation, making them unsuitable for long term monitoring. Although a relatively new technique, the PTT method has shown to be able to accurately track blood pressure changes over short periods of time, after which re-calibration is necessary. The purpose of this study is to determine the accuracy of the method.

  11. An Investigation of Pulse Transit Time as a Non-Invasive Blood Pressure Measurement Method

    International Nuclear Information System (INIS)

    The objective of this paper is to examine the Pulse Transit Method (PTT) as a non-invasive means to track Blood Pressure over a short period of time. PTT was measured as the time it takes for an ECG R-wave to propagate to the finger, where it is detected by a photoplethysmograph sensor. The PTT method is ideal for continuous 24-hour Blood Pressure Measurement (BPM) since it is both cuff-less and non-invasive and therefore comfortable and unobtrusive for the patient. Other techniques, such as the oscillometric method, have shown to be accurate and reliable but require a cuff for operation, making them unsuitable for long term monitoring. Although a relatively new technique, the PTT method has shown to be able to accurately track blood pressure changes over short periods of time, after which re-calibration is necessary. The purpose of this study is to determine the accuracy of the method.

  12. An Investigation of Pulse Transit Time as a Non-Invasive Blood Pressure Measurement Method

    Energy Technology Data Exchange (ETDEWEB)

    McCarthy, B M; O' Flynn, B; Mathewson, A, E-mail: brian.mccarthy@tyndall.ie [Tyndall National Institute, UCC, Lee Maltings, Prospect Row, Cork (Ireland)

    2011-08-17

    The objective of this paper is to examine the Pulse Transit Method (PTT) as a non-invasive means to track Blood Pressure over a short period of time. PTT was measured as the time it takes for an ECG R-wave to propagate to the finger, where it is detected by a photoplethysmograph sensor. The PTT method is ideal for continuous 24-hour Blood Pressure Measurement (BPM) since it is both cuff-less and non-invasive and therefore comfortable and unobtrusive for the patient. Other techniques, such as the oscillometric method, have shown to be accurate and reliable but require a cuff for operation, making them unsuitable for long term monitoring. Although a relatively new technique, the PTT method has shown to be able to accurately track blood pressure changes over short periods of time, after which re-calibration is necessary. The purpose of this study is to determine the accuracy of the method.

  13. Continuous blood pressure measurement using the pulse transit time: Comparison to intra-arterial measurement.

    Science.gov (United States)

    Patzak, Andreas; Mendoza, Yuri; Gesche, Heiko; Konermann, Martin

    2015-01-01

    Continuous blood pressure (BP) measurement allows the investigation of transient changes in BP and thus may give insights into mechanisms of BP control. We validated a continuous, non-invasive BP measurement based on the pulse transit time (PTT), i.e., BP(PTT), by comparing it with the intra-arterial BP (BP(i.a.)) measurement. Twelve subjects (five females and seven males) were included. BP(i.a.) was obtained from the radial artery using a system from ReCor Medical. Systolic and diastolic BP were calculated using the PTT (BP(PTT), SOMNOscreen). (PTT) was determined from the electrocardiogram and the peripheral pulse wave. The BP was modulated by application of increasing doses of dobutamine (5, 10, 20 μg/kg body mass). Systolic BP(PTT) and systolic BP(i.a.) correlated significantly (R = 0.94). The limits of agreement in the Bland-Altman plot were ± 19 mmHg; the mean values differed by 1 mmHg. The correlation coefficient for the diastolic BP measurements was R = 0.42. The limits of agreement in the Bland-Altman plot were ± 18 mmHg, with a mean difference of 5 mmHg in favour of the BP(PTT). The study demonstrates a significant correlation between the measurement methods for systolic BP. The results encourage the application of PTT-based BP measurement for the evaluation of BP dynamics and pathological BP changes. PMID:25857601

  14. Aspects of the continuous clinical measurement of arterial blood pressure and cardiac output

    International Nuclear Information System (INIS)

    In this paper the authors try to classify circulatory measurements as to certain characteristics such as ''activeness'', ''invasivenesss'', etc. Next they turn to defining some fundamental measurements in the blood circulation and focus attention on the continuous measurement of systemic arterial pressure and flow to finally emphasize the inaccuracy of clinical cardiac output methods. The conclusion is that clinical circulatory measurement methods have accuracies at least an order of magnitude worse than common physical methods used in electrical or mechanical engineering. (Auth.)

  15. Relationship between blood pressure measurements recorded on patients' charts in family physicians' offices and subsequent 24 hour ambulatory blood pressure monitoring

    Directory of Open Access Journals (Sweden)

    Birtwhistle Richard

    2004-03-01

    chart were uncontrolled according to 24 hour ABPM criteria. This suggests that the white coat effect makes blood pressure measurements in the doctor's offices, at least as currently done, not sufficiently accurate for determining treatment endpoint.

  16. Effects of external pressure loading on human skin blood flow measured by 133Xe clearance

    International Nuclear Information System (INIS)

    Forearm skin blood flow was measured during external pressure loading in normal human subjects using 133Xe washout from intracutaneous injection sites. Pressures ranging between 5 and 150 mmHg were applied through a 3-cm-diameter disc placed over the site of flow determination. The pressure was maintained constant by a servo-controlled loading mechanism. Flow decreased with pressures from 5 to 10 and 30 to 150 mmHg, but remained constant with pressures from 10 to 30 mmHg. Reactive hyperemia occurred following removal of pressures of 90 mmHg or greater, but did not occur following removal of lower pressures. The pressure-flow curve for parasacral skin of paraplegic subjects closely paralleled the pressure-flow curve of normal skin at pressures tested: 5 to 15 mmHg. These data are interpreted to demonstrate autoregulation of skin blood flow. Autoregulation in parasacral skin of paraplegic subjects suggests a peripheral mechanism. The occurrence of hyperemia at pressures which exceed the ability of skin to autoregulate suggests that both autoregulation and post occlusion hyperemia may have the same mechanism

  17. High blood pressure medications

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/article/007484.htm High blood pressure medicines To use the sharing features on this page, please enable JavaScript. Treating high blood pressure will help prevent problems such as heart disease, ...

  18. Blood Pressure Medicines

    Science.gov (United States)

    High blood pressure, also called hypertension, usually has no symptoms. But it can cause serious problems such as stroke, heart ... kidney failure. If you cannot control your high blood pressure through lifestyle changes such as losing weight and ...

  19. Classification of peripheral occlusive arterial diseases based on symptoms, signs and distal blood pressure measurements

    DEFF Research Database (Denmark)

    Tønnesen, K H; Noer, Ivan; Paaske, William; Sager, P

    1980-01-01

    Systolic blood pressures at toe and ankle were measured in 459 consecutive patients with occlusive arterial disease. Fifty-eight per cent had intermittent claudication with arterial disease of all degrees of severity. Seventeen per cent complained of rest pain having toe systolic pressures below 30...... occlusive arterial disease which was located distally on the legs. A classification in three groups is suggested: (1) ischemia only during exercise; (2) ischemia at rest with or without ulcerations: and (3) diabetics with chronic ulcerations....

  20. MRI-compatible noninvasive continuous blood pressure measurement using fiber optics

    Science.gov (United States)

    Harja, Juha; Myllylä, Teemu S.; Sorvoja, Hannu S. S.; Myllylä, Risto A.; Elseoud, Ahmed A.; Nikkinen, Juha; Kiviniemi, Vesa; Tervonen, Osmo

    2010-02-01

    This report focuses on designing and implementing a non-invasive blood pressure measuring device capable of being used during magnetic resonance imaging. This device is based on measuring pulse wave velocity in arterial blood and using the obtained result to estimate diastolic blood pressure. Pulse transit times are measured by two fibre optical accelerometers placed over chest and carotid artery. The fabricated accelerometer contains two static fibres and a cantilever beam. The free end of the beam is angled at 90 degrees to act as a reflecting surface. Optical fibres are used for both illuminating the surface and receiving the reflected light. Acceleration applied to the sensor causes deflection of the beam, whereupon the amount of reflected light changes. The sensor output voltage is proportional to the intensity of the reflected light. Tests conducted on the electronics and sensors inside an MRI room during scanning proved that the device is MR conditional. No artifacts or distortions were detected.

  1. Continuous blood pressure monitoring during exercise using pulse wave transit time measurement.

    Science.gov (United States)

    Lass, J; Meigas, K; Karai, D; Kattai, R; Kaik, J; Rossmann, M

    2004-01-01

    This paper gives an overview of a research, which is focused on the development of the convenient device for continuous non-invasive monitoring of arterial blood pressure. The blood pressure estimation method is based on a presumption that there is a singular relationship between the pulse wave propagation time in arterial system and blood pressure. The parameter used in this study is pulse wave transit time (PWTT). The measurement of PWTT involves the registration of two time markers, one of which is based on ECG R peak detection and another on the detection of pulse wave in peripheral arteries. The reliability of beat to beat systolic blood pressure calculation during physical exercise was the main focus for the current paper. Sixty-one subjects (healthy and hypertensive) were studied with the bicycle exercise test. As a result of current study it is shown that with the correct personal calibration it is possible to estimate the beat to beat systolic arterial blood pressure during the exercise with comparable accuracy to conventional noninvasive methods. PMID:17272172

  2. Oscillometric blood pressure measurement: a simple method in screening for peripheral arterial disease

    DEFF Research Database (Denmark)

    Mehlsen, Jesper; Wiinberg, Niels; Bruce, Christopher

    2008-01-01

    Blood pressure at the ankle level is a reliable indicator of peripheral arterial disease (PAD) and the ankle brachial index (ABI) is a useful non-invasive screening tool for the early detection of atherosclerosis. In the first part of the study, systolic blood pressures obtained by oscillometry and...... PAD was sufficiently high in subjects over the age of 60 years to warrant screening. The ankle brachial index based on measurements with an oscillometric device was shown reliable in the exclusion of PAD, thereby fulfilling an important criterion for the use in screening....

  3. Differences in blood pressure measurements in the forearm and upper arm of obese otherwise healthy first year medical students

    OpenAIRE

    Suganthi V, Navin Rajaratnam, Suzanne Maria D’cruz

    2014-01-01

    Background: The prevalence of obesity is increasing in Indian youth and obesity is associated with complications like systemic hypertension. Often, due to the non-availability of appropriate sized cuffs, standard cuff bladders are used to measure blood pressure in the forearms of obese young adults. Aim: To compare the upper arm arterial blood pressure measured using an appropriate cuff with the forearm arterial blood pressure measured using a standard cuff and conventional sphygmomanometry i...

  4. Comparison of oscillometric and intra-arterial blood pressure and pulse measurement.

    Science.gov (United States)

    Rithalia, S V; Edwards, D

    1994-01-01

    Non-invasive oscillometric blood pressure and pulse measured by an Omron HEM-703CP monitor were compared with arterial values obtained from direct measurements of the radial artery. An excellent correlation and agreement was found between the two methods (systolic r = 0.99; diastolic r = 0.97; pulse r = 0.99), although there was some variability among individual subjects. The range of difference between them was 0 to 10 mmHg for systolic and -6 to +5 mmHg for diastolic pressures. When tested on the bench using the Metron QA-1280 non-invasive blood pressure analyser the HEM-703CP monitor rarely exhibited errors exceeding 2-3 mmHg over a measurement range of 50-200 mmHg. PMID:7776359

  5. Peripheral arterial volume distensibility: significant differences with age and blood pressure measured using an applied external pressure

    International Nuclear Information System (INIS)

    A new arterial distensibility measurement technique was assessed in 100 healthy normotensive subjects. Arterial transmural pressures on the whole right arm were reduced with a 50 cm long cuff inflated to 10, 20, 30 and 40 mmHg. The electrocardiogram, and finger and ear photoplethysmograms were recorded simultaneously. Arm pulse propagation time, pulse wave velocity (PWV) and arterial volume distensibility were determined. With a 40 mmHg reduction in transmural pressure, arm pulse propagation time increased from 61 to 83 ms, PWV decreased from 12 to 8 m s−1 and arterial distensibility increased from 0.102% to 0.232% per mmHg (all P < 0.0001). At all cuff pressures, arterial distensibility was significantly related to resting mean arterial pressure (MAP), diastolic blood pressure (DBP) and age, and for systolic blood pressure at 30 and 40 mmHg (all P < 0.05). At 40 mmHg cuff pressure, arterial distensibility fell by 54% for a MAP increase from 75 to 105 mmHg, 57% for a DBP increase from 60 to 90 mmHg and 47% for an age increase from 20 to 70 years. These changes were more than double than those without cuff pressure. Our technique showed that systemic volume distensibility of the peripheral arm artery reduced with age, with a greater effect at higher external and lower transmural pressures

  6. Is it reliable to measure the forearm blood pressure in children?

    OpenAIRE

    Amar M. Taksande; Aishwarya Jadhav; Jyoti Nair

    2015-01-01

    Background: When the upper arm (UA) is inaccessible or a standard-sized blood pressure (BP) cuff is unavailable, some healthcare workers use the forearm (FA) to measure BP with a mercury sphygmomanometer. Objective: The objective was to determine the accuracy of BP measurement in the arm and FA. Design: Prospective, randomized study. Setting: Department of Pediatrics, JNMC, Sawangi (Meghe) Participants: A total of 72 children aged 5-15 years. Measurements: Mercury and Automatic (OMRON Tokyo, ...

  7. ORANGE JUICE AND BLOOD PRESSURE

    Directory of Open Access Journals (Sweden)

    M. F. VALIM

    2009-01-01

    Full Text Available

    Blood pressure is the force of blood against artery walls. It is measured in millimeters of mercury (mm Hg and recorded as two numbers: systolic pressure (as the heart contracts over diastolic pressure (as the heart relaxes between beats. High blood pressure (hypertension is defined as chronically elevated high blood pressure, with systolic blood pressure (SBP of 140 mm Hg or greater, and diastolic blood pressure (DBP of 90 mm Hg or greater. High blood pressure (HBP, smoking, abnormal blood lipid levels, obesity and diabetes are risk factors for coronary heart disease, the leading cause of death in the US. Lifestyle modifications such as engaging in regular physical activity, quitting smoking and eating a healthy diet (limiting intake of saturated fat and sodium and increasing consumption of fiber, fruits and vegetables are advocated for the prevention, treatment, and control of HBP. As multiple factors influence blood pressure, the effects of each factor are typically modest, particularly in normotensive subjects, yet the combined effects can be substantial. Nutrition plays an important role in influencing blood pressure. Orange juice should be included as part of any low sodium diet and/or any blood pressure reducing eating plan, as it is sodium free, fat-free and can help meet recommended levels of potassium intake that may contribute to lower BP.

  8. Observational study comparing non-invasive blood pressure measurement at the arm and ankle during caesarean section.

    Science.gov (United States)

    Drake, M J P; Hill, J S

    2013-05-01

    Upper-arm non-invasive blood pressure measurement during caesarean section can be uncomfortable and unreliable because of movement artefact in the conscious parturient. We aimed to determine whether ankle blood pressure measurement could be used instead in this patient group by comparing concurrent arm and ankle blood pressure measured throughout elective caesarean section under regional anaesthesia in 64 term parturients. Bland-Altman analysis of mean difference (95% limits of agreement [range]) between the ankle and arm was 11.2 (-20.3 to +42.7 [-67 to +102]) mmHg for systolic arterial pressure, -0.5 (-21.0 to +19.9 [-44 to +91]) mmHg for mean arterial pressure and -3.8 (-25.3 to +17.8 [-41 to +94]) mmHg for diastolic arterial pressure. Although ankle blood pressure measurement is well tolerated and allows greater mobility of the arms than measurement from the arm, the degree of discrepancy between the two sites is unacceptable to allow routine use of ankle blood pressure measurement, especially for systolic arterial pressure. However, ankle blood pressure measurement may be a useful alternative in situations where arm blood pressure measurement is difficult or impossible. PMID:23480469

  9. Measurement of Blood Pressure Using an Arterial Pulsimeter Equipped with a Hall Device

    OpenAIRE

    Jong-Gu Choi; Keun-Ho Kim; Woo-Beom Lee; Dong-Hyun Nam; Il-Ho Son; You-Sik Hong; Sang-Suk Lee

    2011-01-01

    To measure precise blood pressure (BP) and pulse rate without using a cuff, we have developed an arterial pulsimeter consisting of a small, portable apparatus incorporating a Hall device. Regression analysis of the pulse wave measured during testing of the arterial pulsimeter was conducted using two equations of the BP algorithm. The estimated values of BP obtained by the cuffless arterial pulsimeter over 5 s were compared with values obtained using electronic or liquid mercury BP meters. The...

  10. Results of kidney function measurement and blood pressure in population from endemic region of Vitina

    Directory of Open Access Journals (Sweden)

    Stašević Zvonimir

    2008-01-01

    Full Text Available Introduction. The analysis of frequency of kidney diseases, causes of terminal renal failure in patients subjected to repeated dialysis in major dialysis centers in the region of Kosovo and Metohija as well as mortality rate in these patients showed a stable number of patients with kidney diseases, evidencing that the populations of Vitina and Gnjilane were the most commonly affected. These towns are designated as regions with the highest incidence of Balkan endemic nephropathy. The present analysis was aimed at: 1. establishing the incidence rate of hypertension and renal function impairment by using clinical and laboratory analyses in individuals from Vitina and neighboring villages, and 2. investigating the correlation between creatinine clearance, age and arterial blood pressure in the studied group. Material and methods. The analysis included 510 individuals (excluding diabetics over the one-month period during 2004 (201 males with their age ranging from 18 to 90 years. Blood pressure measurements were performed in all the individuals, while renal function was determined by glomerular filtration rate (GFR, as calculated according to Cockcroft-Gault formula. Results. Creatinine clearance was lower than 100 ml/min in 237 (46.5% individuals, out of whom 62 (12% had GFR below 60 ml/min. Among the remaining 273 (53.5% individuals with GFR above 100 ml/min, 68 individuals had GFR above 140 ml/min. The distribution of patients depending on their systolic blood pressure values revealed that systolic blood pressure was lower in 44 subjects and higher in 302 subjects (59%. The correlation test revealed significant association between the studied parameters. The positive correlation between patients' age and kidney function means the higher the age of subjects the lower creatinine clearance value (r=-0.622, p<0.001. The negative correlation of the systolic blood pressure value and kidney function was found, meaning that higher the systolic blood

  11. [An automatic non-invasive method for the measurement of systolic, diastolic and mean blood pressure].

    Science.gov (United States)

    Morel, D; Suter, P

    1981-01-01

    A new automatic apparatus for the measurement of arterial pressure by a non-invasive technique was compared with direct intra-arterial measurement in 20 adult patients in a surgical intensive care unit. The apparatus works on the basis of the principle of oscillometry. Blood pressure is determined with a microprocessor by analysis of the amplitude of the oscillations produced by a cuff which is inflated then deflated automatically. Thus mean arterial pressure corresponds to the maximum amplitude. Systolic and diastolic pressures are deduced by extrapolation to zero of the amplitudes on either side of the maximum reading. Mean arterial pressure (AP) proved to be very reliable within the limits studied: 8.0 - 14.7 kPa (60 - 110 mmHg) with a difference in mean direct AP and indirect AP of 0,09 +/- 0.9 kPa SD (0.71 +/- 7 mmHg) and a coefficient of linear correlation between the two methods of r = 0.82. This non-invasive technique determined systolic arterial pressure (sAP) in a less reliable fashion than AP when compared with the invasive technique, with a tendency to flatten the extreme values. The correlation coefficient here was 0.68. Finally, diastolic arterial pressure (dAP) showed a better degree of agreement through with a difference in mean indirect AP and mean direct AP of 1.0 +/- 0.8 kPa (7.6 +/- 6.0 mmHg). These results indicate a good degree of agreement for measurements of mean arterial pressure, clinically the most important, between the two methods used. Measurements of diastolic pressure and above all of diastolic pressure seemed to be less in agreement. This difference could be due to an error in determination of the automatic apparatus tested or to the peripheral site (radial artery) of the intra-arterial catheter used, itself falsifying the humeral arterial pressure. PMID:6113805

  12. Development of a wireless blood pressure measuring device with smart mobile device.

    Science.gov (United States)

    İlhan, İlhan; Yıldız, İbrahim; Kayrak, Mehmet

    2016-03-01

    Today, smart mobile devices (telephones and tablets) are very commonly used due to their powerful hardware and useful features. According to an eMarketer report, in 2014 there were 1.76 billion smartphone users (excluding users of tablets) in the world; it is predicted that this number will rise by 15.9% to 2.04 billion in 2015. It is thought that these devices can be used successfully in biomedical applications. A wireless blood pressure measuring device used together with a smart mobile device was developed in this study. By means of an interface developed for smart mobile devices with Android and iOS operating systems, a smart mobile device was used both as an indicator and as a control device. The cuff communicating with this device through Bluetooth was designed to measure blood pressure via the arm. A digital filter was used on the cuff instead of the traditional analog signal processing and filtering circuit. The newly developed blood pressure measuring device was tested on 18 patients and 20 healthy individuals of different ages under a physician's supervision. When the test results were compared with the measurements made using a sphygmomanometer, it was shown that an average 93.52% accuracy in sick individuals and 94.53% accuracy in healthy individuals could be achieved with the new device. PMID:26626086

  13. What Is High Blood Pressure?

    Science.gov (United States)

    ... also known as blood vessels and capillaries. The pressure --- blood pressure --- is the result of two forces. The ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) Introduction What ...

  14. High Blood Pressure Fact Sheet

    Science.gov (United States)

    ... much alcohol. Signs and Symptoms of High Blood Pressure High blood pressure usually has no warning signs or symptoms , ... they are at high risk for high blood pressure . Blood Pressure Levels Normal systolic: less than 120 mmHg ...

  15. High Blood Pressure (Hypertension)

    Science.gov (United States)

    ... Radiation-Emitting Products Vaccines, Blood & Biologics Animal & Veterinary Cosmetics Tobacco Products For Consumers Home For Consumers Consumer Information by Audience For Women High Blood Pressure (Hypertension) Share Tweet Linkedin Pin ...

  16. Community-based blood pressure measurement by non-health workers using electronic devices: a validation study

    OpenAIRE

    Reidpath, Daniel D.; Ling, Mei Lee; Yasin, Shajahan; Rajagobal, Kanason; Allotey, Pascale

    2012-01-01

    Introduction: Population monitoring and screening of blood pressure is an important part of any population health strategy. Qualified health workers are expensive and often unavailable for screening. Non-health workers with electronic blood pressure monitors are increasingly used in community-based research. This approach is unvalidated. In a poor, urban community we compared blood pressure measurements taken by non-health workers using electronic devices against qualified health workers usin...

  17. Factors Associated With Adherence to Blood Pressure Measurement Recommendations at Pediatric Primary Care Visits, Minnesota and Colorado, 2007–2010

    OpenAIRE

    Parker, Emily D; Sinaiko, Alan R; Daley, Matt F.; Kharbanda, Elyse O; Trower, Nicole K.; Tavel, Heather M.; Sherwood, Nancy E.; Magid, David J.; Margolis, Karen L.; O’Connor, Patrick J.

    2015-01-01

    Introduction Elevated blood pressure in childhood may predict increased cardiovascular risk in young adulthood. The Task Force on the Diagnosis, Evaluation and Treatment of High Blood pressure in Children and Adolescents recommends that blood pressure be measured in children aged 3 years or older at all health care visits. Guidelines from both Bright Futures and the Expert Panel of Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents recommend annual ...

  18. Measurement of brachial artery endothelial function using a standard blood pressure cuff

    OpenAIRE

    Maltz, Jonathan S.; Tison, Geoffrey H; Alley, Hugh F.; Budinger, Thomas F; Owens, Christopher D.; Olgin, Jeffrey

    2015-01-01

    The integrity of endothelial function in major arteries (EFMA) is a powerful independent predictor of heart attack and stroke. Existing ultrasound-based non-invasive assessment methods are technically challenging and suitable only for laboratory settings. EFMA, like blood pressure (BP), is both acutely and chronically affected by factors such as lifestyle and medication. Consequently, lab-based measurements cannot fully gauge the effects of medical interventions on EFMA. EFMA and BP have, arg...

  19. a New Approach of Dynamic Blood Pressure Measurement Based on the Time Domain Analysis of the Pulse Wave

    Science.gov (United States)

    Zimei, Su; Wei, Xu; Hui, Yu; Fei, Du; Jicun, Wang; Kexin, Xu

    2009-08-01

    In this study the pulse wave characteristics were used as a new approach to measure the human blood pressure. Based the principle of pulse wave and theory of the elastic vascular, the authors analyzed the characteristic of the pulse waveforms and revealed the characteristics points which could be used to represent the blood pressure. In this investigation the relevant mathematical feature was used to identify the relationship between the blood pressure and pulse wave parameters in a more accurate way. It also provided an experimental basis to carry out continuing non-invasive blood pressure monitoring using the pulse wave method.

  20. Context classification during blood pressure self-measurement using the sensor seat and the audio classification device

    DEFF Research Database (Denmark)

    Wagner, Stefan Rahr; Rasmussen, Niels Holm; Ahrendt, Peter;

    2012-01-01

    Blood pressure self-measurement (BPSM) requires the patient to follow a range of recommendations. Patients must remain silent during measurements, be seated correctly with back support and legs uncrossed, and must have rested at least 5 minutes prior to taking the measurement. Current blood...... process, as well as a sensor seat for measuring patient posture and activity before and during the BPSM process....

  1. Doppler ultrasound compared with strain gauge for measurement of systolic ankle blood pressure

    DEFF Research Database (Denmark)

    Joensen, Jette Bang; Juul, Søren; Abrahamsen, Jimmi;

    2012-01-01

    This study assesses measurement variation in the measurement of ankle systolic blood pressure (ABP) when measured with Doppler ultrasound and with the strain gauge method. Ninety-seven patients were included. ABP was measured with Doppler ultrasound and with the strain gauge method. The methods...... were compared graphically by scatterplots and analyzed by paired t test, analysis of variance, and Pitman's paired variance ratio test. ABP was measured by strain gauge in all extremities, whereas no Doppler signal was obtainable in 7 limbs (4%). There was no systematic difference in measurements...... between the means of the two measurements. However, a substantial difference of more than 25 mm Hg was found in 15% of limbs and more than 20 mm Hg in 20%. In the majority of patients, measurements of ABP by Doppler ultrasound and the strain gauge method give similar results, but for a minority the...

  2. Preventing High Blood Pressure

    Science.gov (United States)

    ... Heart Disease Cholesterol Salt Million Hearts® WISEWOMAN Preventing High Blood Pressure: Healthy Living Habits Recommend on Facebook Tweet Share ... meal and snack options can help you avoid high blood pressure and its complications. Be sure to eat plenty ...

  3. What Causes High Blood Pressure?

    Science.gov (United States)

    ... whether imbalances in this system cause high blood pressure. Blood Vessel Structure and Function Changes in the structure ... can affect blood pressure. Genetic Causes of High Blood Pressure Much of the understanding of the body systems ...

  4. From pioneering to implementing automated blood pressure measurement in clinical practice: Thomas Pickering's legacy

    DEFF Research Database (Denmark)

    Stolarz-Skrzypek, Katarzyna; Thijs, Lutgarde; Wizner, Barbara;

    2010-01-01

    Thomas G. Pickering spent most of his scientific career in carrying out research on clinical hypertension and blood pressure (BP) measurement. In our review of Pickering's seminal work, we first focused on white-coat hypertension and masked hypertension, two terms that he had introduced. Next, we...... involving white-coat hypertension and masked hypertension, diurnal BP variability, and self-measured BP. Recent studies validated Pickering's observations in terms of cardiovascular outcome and bridged the path from concept to application in clinical practice....

  5. A pitfall in the measurement of arterial blood pressure in the ischaemic limb during elevation

    DEFF Research Database (Denmark)

    Bülow, J; Jelnes, Rolf

    1987-01-01

    In order to evaluate if elevation of the ischaemic limb above heart level is an alternative to the conventionally applied method with external counterpressure for estimation of skin perfusion pressure, femoral and popliteal artery pressures were measured directly in eight patients with occlusion of...... the superficial femoral artery. The measurements were done in the horizontal position and during elevation of the calf above heart level. During elevation relative blood flow, measured by arterio-venous oxygen saturation differences, decreased compared with the horizontal position. In contrast the...... lower extremity cannot be determined non-invasively by elevation of the extremity, probably due to collapse of segments of the vascular bed increasing the vascular resistance considerably....

  6. [24-hour blood pressure measurement in normal pregnancy in hypertensive pregnant patients].

    Science.gov (United States)

    Rath, W; Schrader, J; Guhlke, U; Buhr-Schinner, H; Haupt, A; Kramer, A; Kuhn, W

    1990-08-01

    Noninvasive 24-hour ambulatory blood pressure monitoring was performed in 17 normotensive and 19 preeclamptic pregnant women. The normotensive women showed a significant nightly decline in their systolic and diastolic blood pressure. In contrast, the preeclamptic women demonstrated either an attenuated circadian rhythm or no circadian rhythm at all. This result was even more pronounced in patients with severe hypertension, some of whom had a nocturnal increase in blood pressure in spite of being treated with antihypertensive drugs in an evening dose. The lack of nocturnal blood pressure decrease was also found 24 hours post partum. In summary, these results suggest that preeclamptic women are endangered by hypertensive emergencies mostly during the night. Therefore blood pressure controls should be extended into the night, and antihypertensive drugs should also be given in a sufficient evening dose. PMID:2214601

  7. Differences in blood pressure measurements in the forearm and upper arm of obese otherwise healthy first year medical students

    Directory of Open Access Journals (Sweden)

    Suganthi V, Navin Rajaratnam, Suzanne Maria D’cruz

    2014-07-01

    Full Text Available Background: The prevalence of obesity is increasing in Indian youth and obesity is associated with complications like systemic hypertension. Often, due to the non-availability of appropriate sized cuffs, standard cuff bladders are used to measure blood pressure in the forearms of obese young adults. Aim: To compare the upper arm arterial blood pressure measured using an appropriate cuff with the forearm arterial blood pressure measured using a standard cuff and conventional sphygmomanometry in obese otherwise healthy first year medical students. Materials and Methods: Blood pressure was measured in 27 obese otherwise healthy first year medical students after five minutes of rest using a mercury sphygmomanometer with the subjects seated and the arm and forearm at heart level, using an appropriate sized cuff for the upper arm according to American Heart Association standards and a standard cuff for the fore arm. Results: A statistically significant difference in both systolic [t-test (paired = -6.921; df = 26; sig = .000 (2- tailed] and diastolic blood pressure [t-test (paired = -8.508; df = 26; sig = .000 (2- tailed] was found, with the blood pressure readings being higher in the forearm. The correlations between upper arm and forearm systolic and diastolic blood pressure were 0.785 (p = .000 and 0.870 (p = .000. Conclusion: Both systolic and diastolic blood pressure measurements were significantly higher in the forearm. Further studies with larger sample size should be conducted to confirm that forearm blood pressure measurements using standard cuff bladders cannot be considered equal to upper arm measurements made using an appropriate sized cuff in all young obese individuals

  8. Microalbuminuria Measured by three Different Methods, Blood Pressure and Cardiovascular Risk Factors in Elderly Swedish Males

    Directory of Open Access Journals (Sweden)

    Gösta Florvall

    2008-01-01

    Full Text Available Microalbuminuria is associated with hypertension and is a strong risk factor for subsequent chronic disease, both renal and coronary heart disease (CHD, Presently there are several methods available for measurement of microalbuminuria. The aim of this study was to evaluate if the three different methods gave similar information or if one of the assays were superior to the others. Blood pressure, inflammatory markers and cardiovascular mortality and morbidity were correlated with urine albumin analysed with a point-of-care testing (POCT instrument, nephelometric determination of albumin and albumin/creatinine ratio in elderly males. The study population consisted of 103 diabetic and 603 nondiabetic males (age 77 years in a cross-sectional study. We analyzed urine albumin with a HemoCue® Urine Albumin POCT instrument and a ProSpec® nephelometer and albumin/creatinine ratio. There were strong correlations between both systolic and diastolic blood pressure and all three urine albumin methods (p < 0.0001. There were also significant correlations between the different urine albumin measurements and serum amyloid A component, high-sensitivity C-reactive protein and interleukin-6. The three different urine albumin methods studied provided similar information in relation to cardiovascular disease. There was a strong correlation between systolic and diastolic blood pressure and microalbuminuria in both the whole study population and in nondiabetic males emphasizing the role of hypertension in glomerular damage. The good correlation between the studied urine albumin measurements show that all three methods can be used for monitoring urine albumin excretion.

  9. Low frequency arterial wall movements for indirect blood pressure measurement in man. Validation of a method for non-invasive assessment of blood pressure under the influence of isoprenaline and angiotensin.

    Science.gov (United States)

    Dietz, U; Belz, G G

    1991-05-01

    In order to measure blood pressure noninvasively, the second derivative of the low frequency wall movements of the brachial artery were registered with a piezo-electric pressure probe during deflation of a Riva-Rocci cuff along with the actual cuff pressure. Two characteristic phenomena of this signal have been suggested to reflect systolic and diastolic blood pressure. Appearance of a positive spike phenomenon (S) was suggested to indicate systolic blood pressure and disappearance of a negative preanacrotic notch (D) to indicate diastolic blood pressure. To prove the validity of these suggestions, these phenomena were assessed in 10 young healthy males during isoprenaline and angiotensin induced changes of blood pressure. Intraarterial (A. radialis) and auscultatory (A. brachialis) blood pressures were recorded simultaneously. Determination of systolic blood pressure with the S phenomenon agreed well with invasive and auscultatory results. Invasive diastolic values agreed well with the cuff pressure at the last signal before disappearance of the preanacrotic notch (D1). Data from auscultation agreed less well with the D1 phenomenon. With increasing doses of isoprenaline, the diastolic measurements (D1) tended to be lower than the invasive ones. However, this discrepancy was far discreeter than that seen with ordinary auscultatory blood pressure measurement. We therefore conclude that registrations of low frequency arterial wall movements yield distinct characteristic spike phenomena useful for measurement of blood pressure in good agreement with the invasive method. In addition, the method provides clearly documented records and should be useful in situations which rely on a valid indirect method. PMID:1898428

  10. Blood Pressure vs. Heart Rate

    Science.gov (United States)

    ... Pressure High Blood Pressure Tools & Resources Stroke More Blood Pressure vs. Heart Rate Updated:Aug 30,2016 Blood ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) Introduction What ...

  11. Measurement of Blood Pressure Using an Arterial Pulsimeter Equipped with a Hall Device

    Directory of Open Access Journals (Sweden)

    Jong-Gu Choi

    2011-01-01

    Full Text Available To measure precise blood pressure (BP and pulse rate without using a cuff, we have developed an arterial pulsimeter consisting of a small, portable apparatus incorporating a Hall device. Regression analysis of the pulse wave measured during testing of the arterial pulsimeter was conducted using two equations of the BP algorithm. The estimated values of BP obtained by the cuffless arterial pulsimeter over 5 s were compared with values obtained using electronic or liquid mercury BP meters. The standard deviation between the estimated values and the measured values for systolic and diastolic BP were 8.3 and 4.9, respectively, which are close to the range of values of the BP International Standard. Detailed analysis of the pulse wave measured by the cuffless radial artery pulsimeter by detecting changes in the magnetic field can be used to develop a new diagnostic algorithm for BP, which can be applied to new medical apparatus such as the radial artery pulsimeter.

  12. Community-based blood pressure measurement by non-health workers using electronic devices: a validation study

    Directory of Open Access Journals (Sweden)

    Daniel D. Reidpath

    2012-06-01

    Full Text Available Introduction: Population monitoring and screening of blood pressure is an important part of any population health strategy. Qualified health workers are expensive and often unavailable for screening. Non-health workers with electronic blood pressure monitors are increasingly used in community-based research. This approach is unvalidated. In a poor, urban community we compared blood pressure measurements taken by non-health workers using electronic devices against qualified health workers using mercury sphygmomanometers. Method: Fifty-six adult volunteers participated in the research. Data were collected by five qualified health workers, and six non-health workers. Participants were randomly allocated to have their blood pressure measured on four consecutive occasions by alternating a qualified health worker with a non-health worker. Descriptive statistics and graphs, and mixed effects linear models to account for the repeated measurement were used in the analysis. Results: Blood pressure readings by non-health workers were more reliable than those taken by qualified health workers. There was no significant difference between the readings taken by qualified health workers and those taken by non-health workers for systolic blood pressure. Non-health workers were, on average, 5–7 mmHg lower in their measures of blood pressure than the qualified health workers (95%HPD: −2.9 to −10.0 for diastolic blood pressure. Conclusion: The results provide empirical evidence that supports the practice of non-health workers using electronic devices for BP measurement in community-based research and screening. Non-health workers recorded blood pressures that differed from qualified health workers by no more than 10 mmHg. The approach is promising, but more research is needed to establish the generalisability of the results.

  13. Numerical analysis of stress distribution in the upper arm tissues under an inflatable cuff: Implications for noninvasive blood pressure measurement

    Science.gov (United States)

    Deng, Zhipeng; Liang, Fuyou

    2016-07-01

    An inflatable cuff wrapped around the upper arm is widely used in noninvasive blood pressure measurement. However, the mechanical interaction between cuff and arm tissues, a factor that potentially affects the accuracy of noninvasive blood pressure measurement, remains rarely addressed. In the present study, finite element (FE) models were constructed to quantify intra-arm stresses generated by cuff compression, aiming to provide some theoretical evidence for identifying factors of importance for blood pressure measurement or explaining clinical observations. Obtained results showed that the simulated tissue stresses were highly sensitive to the distribution of cuff pressure on the arm surface and the contact condition between muscle and bone. In contrast, the magnitude of cuff pressure and small variations in elastic properties of arm soft tissues had little influence on the efficiency of pressure transmission in arm tissues. In particular, it was found that a thickened subcutaneous fat layer in obese subjects significantly reduced the effective pressure transmitted to the brachial artery, which may explain why blood pressure overestimation occurs more frequently in obese subjects in noninvasive blood pressure measurement.

  14. Nurses' knowledge and skill of blood pressure measurement technique in a private hospital setting / Hanette du Toit

    OpenAIRE

    Du Toit, Hanette

    2013-01-01

    Background: Nurses are responsible for the monitoring and assessment of blood pressure in the clinical setting. Increasing evidence has demonstrated that inaccurate measurement technique often leads to the misclassification of large numbers of individuals as hypertensive. The impact of untreated or poorly treated hypertension, due to misclassification of patients, is a major contributor to the overall burden of adult diseases in any population. Accurate measurement of blood pressure relies on...

  15. Is it reliable to measure the forearm blood pressure in children?

    Directory of Open Access Journals (Sweden)

    Amar M Taksande

    2015-01-01

    Full Text Available Background: When the upper arm (UA is inaccessible or a standard-sized blood pressure (BP cuff is unavailable, some healthcare workers use the forearm (FA to measure BP with a mercury sphygmomanometer. Objective: The objective was to determine the accuracy of BP measurement in the arm and FA. Design: Prospective, randomized study. Setting: Department of Pediatrics, JNMC, Sawangi (Meghe Participants: A total of 72 children aged 5-15 years. Measurements: Mercury and Automatic (OMRON Tokyo, 108-0075 Japan BP measurements were recorded from the arm and FA at 2 min intervals. Results: In our study, 72 children of both sexes were enrolled. The mean age of the children was 10.13 ± 2.82 years, and 48% were females. Pearson′s correlation coefficient between FA and UA systolic BP (SBP measured by mercury was 0.782, and for diastolic BP (DBP it was 0.824. Similarly, Pearson′s correlation coefficient between FA and UA SBP measured with an automated device (OMRON was 0.843, and for DBP it was 0.846. The average readings for the SBP and DBP were higher in the FA than in the UA by approximately 3 mmHg. There was a statistically significant difference in both SBP and DBP. Conclusions: The FA is an acceptable method of BP monitoring when the UA cannot be accessed. The pressure from FA is probably higher than it would be from UA.

  16. Prevention of High Blood Pressure

    Science.gov (United States)

    ... from the NHLBI on Twitter. Prevention of High Blood Pressure Healthy lifestyle habits, proper use of medicines, and ... high blood pressure or its complications. Preventing High Blood Pressure Onset Healthy lifestyle habits can help prevent high ...

  17. Medications for High Blood Pressure

    Science.gov (United States)

    ... dangerous as elevations of both systolic and diastolic pressure. Blood pressure is elevated for two main reasons: too ... and Angiotensin II receptor blockers (ARBs), reduce blood pressure by relaxing blood vessels Beta blockers, which also cause the heart ...

  18. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... of High Blood Pressure For most patients, health care providers diagnose high blood pressure when blood pressure ... painless and can be done in a health care provider’s office or clinic. To prepare for the ...

  19. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... providers diagnose high blood pressure when blood pressure readings are consistently 140/90 mmHg or above. Confirming ... minutes before the test. To track blood pressure readings over a period of time, the health care ...

  20. Prognostic value of blood pressure measured during hospitalization after acute myocardial infarction: an insight from survival trials

    DEFF Research Database (Denmark)

    Yap, Yee Guan; Duong, Trinh; Bland, J Martin; Malik, Marek; Torp-Pedersen, Christian Tobias; Køber, Lars; Connolly, Stuart J; Gallagher, Mark M; Camm, A John

    2007-01-01

    , CAMIAT, SWORD, TRACE and DIAMOND-MI studies with left ventricular ejection fraction less than 40% or asymptomatic ventricular arrhythmia surviving more than 45 days after MI were pooled. Systolic and diastolic blood pressures and pulse pressures were measured soon after MI (median 6 days, range 0-53 days......BACKGROUND: The prognostic value of blood pressure measured during hospitalization after acute myocardial infarction (MI) has not been investigated, particularly with regard to arrhythmic death. METHODS: A total of 3311 placebo patients (2612 men, median age 64 years; range 23-92) from the EMIAT...... pressure measured during hospitalization after acute MI significantly increased the risk of all-cause mortality [hazard ratio (HR) for 10% increase in systolic blood pressure 0.80, 95% confidence interval (CI) 0.71-0.90; P < 0.001] and arrhythmic mortality (HR 0.73, 95% CI 0.61-0.86; P = 0.001). Reduced...

  1. Relative pressure estimation from velocity measurements in blood flows: state-of-the-art and new approaches

    OpenAIRE

    Bertoglio, Cristobal; Núñez, Rodolfo; Galarce, Felipe; Nordsletten, David; Osses, Axel

    2016-01-01

    The pressure gradient across stenotic blood vessels is an important clinical index for diagnosis of the pathological severity of the cardiovascular disease. While the clinical gold standard for its measurement is invasive catheterization, Phase-Contrast MR-imaging has emerged as a promising tool for enabling a non-invasive quantification of the relative pressures, by linking the (highly spatially resolved) velocity measurements with the relative pressure via the Navier-Stokes equations. In th...

  2. Healing of ulcers on the feet correlated with distal blood pressure measurements in occlusive arterial disease

    DEFF Research Database (Denmark)

    Holstein, P; Lassen, N A

    1980-01-01

    (SPPH) as measured with a photocell. Thirty-two patients (35 feet with ulcerations) had diabetes mellitus. The treatment was conservative. In 42 feet the ulcers healed after an average period of 5.8 months; in 24 feet major amputation became necessary after an average of 4.3 months. The frequency of...... cases (9%) healed. Of the 11 cases with SDBP of 20 to 29 mmHg seven cases (64%) healed and of the 33 cases with SDBP of30 mmHg or above all cases (100%) healed. There was no significant difference between the 35 diabetic feet and the 31 non-diabetic feet as regards the healing rates, although infection...... and peripheral neuropathy were frequent in the diabetic group. The data show that the systolic digital blood pressure is a particularly valuable prognostic parameter....

  3. Types of Blood Pressure Medications

    Science.gov (United States)

    ... Blood Pressure Tools & Resources Stroke More Types of Blood Pressure Medications Updated:Aug 26,2016 Many medications known ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  4. High Blood Pressure and Women

    Science.gov (United States)

    ... High Blood Pressure Tools & Resources Stroke More High Blood Pressure and Women Updated:Aug 13,2014 Many people ... was last reviewed on 08/04/14. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  5. Home and Office Blood Pressure Control among Treated Hypertensive Patients in Japan: Findings from the Japan Home versus Office Blood Pressure Measurement Evaluation (J-HOME Study

    Directory of Open Access Journals (Sweden)

    Nariyasu Mano

    2010-02-01

    Full Text Available Appropriate control of blood pressure (BP is essential for prevention of future cardiovascular events. However, BP control among treated hypertensive patients has been insufficient. Recently, the usefulness of self-measured BP at home (home BP measurement for the management of hypertension has been reported in many studies. We evaluated BP control both at home and in the office among treated hypertensive patients in primary care settings in Japan (the J-HOME study. We found poor control of home and office BPs and clarified some factors affecting control. We also examined factors associated with the magnitude of the white-coat effect, the morning–evening BP difference, and home heart rate in this J-HOME study.

  6. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Clinical Trials What Are Clinical Trials? Children & Clinical Studies NHLBI ... providers diagnose high blood pressure when blood pressure readings are consistently 140/90 mmHg or above. Confirming High Blood ...

  7. Diagnosis of High Blood Pressure

    Science.gov (United States)

    ... Clinical Trials What Are Clinical Trials? Children & Clinical Studies NHLBI ... providers diagnose high blood pressure when blood pressure readings are consistently 140/90 mmHg or above. Confirming High Blood ...

  8. Questions and Answers about High Blood Pressure

    Science.gov (United States)

    ... Blood Pressure Page Content What is high blood pressure? Blood pressure is the force of blood against the ... do I know if I have high blood pressure? High blood pressure is often called "the silent killer" because ...

  9. Measurement of brachial artery endothelial function using a standard blood pressure cuff.

    Science.gov (United States)

    Maltz, Jonathan S; Tison, Geoffrey H; Alley, Hugh F; Budinger, Thomas F; Owens, Christopher D; Olgin, Jeffrey

    2015-11-01

    The integrity of endothelial function in major arteries (EFMA) is a powerful independent predictor of heart attack and stroke. Existing ultrasound-based non-invasive assessment methods are technically challenging and suitable only for laboratory settings. EFMA, like blood pressure (BP), is both acutely and chronically affected by factors such as lifestyle and medication. Consequently, laboratory-based measurements cannot fully gauge the effects of medical interventions on EFMA. EFMA and BP have, arguably, comparable (but complementary) value in the assessment of cardiovascular health. Widespread deployment of EFMA assessment is thus a desirable clinical goal. To this end, we propose a device based on modifying the measurement protocol of a standard electronic sphygmomanometer. The protocol involves inflating the cuff to sub-diastolic levels to enable recording of the pulse waveform before and after vasodilatory stimulus. The mechanical unloading of the arterial wall provided by the cuff amplifies the distension that occurs with each pulse, which is measured as a pressure variation in the cuff. We show that the height of the rising edge of each pulse is proportional to the change in lumen area between diastole and systole. This allows the effect of vasodilatory stimuli on the artery to be measured with high sensitivity. We compare the proposed cuff flow-mediated dilation (cFMD) method to ultrasound flow-mediated dilation (uFMD). We find significant correlation (r = 0.55, p = 0.003, N = 27) between cFMD- and uFMD-based metrics obtained when the release of a 5 min cuff occlusion is employed to induce endothelial stimulus via reactive hyperemia. cFMD is approximately proportional to the square of uFMD, representing a typical increase in sensitivity to vasodilation of 300-600%. This study illustrates the potential for an individual to conveniently measure his/her EFMA by using a low-cost reprogrammed home sphygmomanometer. PMID:26393958

  10. Night time blood pressure dip

    Institute of Scientific and Technical Information of China (English)

    Dennis; Bloomfield; Alex; Park

    2015-01-01

    The advent of ambulatory blood pressure monitoring permitted examination of blood pressures during sleep and recognition of the associated circadian fall in pressure during this period. The fall in pressure,called the "dip",is defined as the difference between daytime mean systolic pressure and nighttime mean systolic pressure expressed as a percentage of the day value. Ten percent to 20% is considered normal. Dips less than 10%,referred to as blunted or absent,have been considered as predicting an adverse cardiovascular event. This view and the broader concept that white coat hypertension itself is a forerunner of essential hypertension is disputable. This editorial questions whether mean arterial pressures over many hours accurately represent the systolic load,whether nighttime dipping varies from measure to measure or is a fixed phenomenon,whether the abrupt morning pressure rise is a risk factor or whether none of these issues are as important as the actual night time systolic blood pressure itself. The paper discusses the difference between medicated and nonmedicated white coat hypertensives in regard to the cardiovascular risk and suggests that further work is necessary to consider whether the quality and duration of sleep are important factors.

  11. Blood pressure and atherosclerosis

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    2010319 Effects of combined application of Xuezhikang capsule with hypotensive drugs on arterial compliance and smoothness of the dynamic blood pressure. ZHU Zongtao(朱宗涛),et al. Dept Cardiol, Centr People’s Hosp, Tengzhou 277500.Chin J Integr Tradit & West Med 2010;30

  12. Heat-washout measurements compared to distal blood pressure and perfusion in orthopaedic patients with foot ulcers

    DEFF Research Database (Denmark)

    Midttun, Mette; Azad, B.B.S.; Broholm, R;

    2015-01-01

    Distal blood pressure and local skin perfusion pressure were compared to measurement of blood flow rate (BFR) measured by the heat-washout method in orthopaedic patients with and without diabetes, all with a foot ulcer in one foot, compared to healthy controls. The correlation was good between heat......-washout and distal blood pressure in patients with diabetes with and without an ulcer (P = 0·024 and 0·059, respectively). The correlation was weak in patients without diabetes with and without an ulcer, most probably due to power problems (P = 0·118 and 0·116, respectively). The correlation in the healthy...... oxygen from the surrounding tissue, and therefore, measurements are easier made in these subjects. BFR in the first toe increased significantly in all patients when the foot was moved from heart level to 50 cm below heart level (P = between 0·03 and 0·05) as previously seen in patients with claudication...

  13. Validation of a new non-invasive blood pressure measurement method on mice via pulse wave propagation time measurement on a cuff

    OpenAIRE

    Nguyen, Xuan P.; Kronemayer, Ralf; Herrmann, Peter; Mejía, Atila; Daw, Zamira; Nguyen, Xuan D.; Kränzlin, Bettina; Gretz, Norbert

    2011-01-01

    In the present article, we describe the validation of a new non-invasive method for measuring blood pressure (BP) which also enables to determine the three BP values: systolic, diastolic and mean value. Our method is based on the pulse transit time (PTT) measurement along an artery directly at the BP cuff. The accuracy of this method was evaluated by comparison with the direct simultaneous measurement of blood pressure from 40 anesthetized female mice. Close correlation ...

  14. A Coherent Pattern Among Social Behavior, Blood Pressure, Corticosterone and Catecholamine Measures in Individual Male Rats

    NARCIS (Netherlands)

    FOKKEMA, DS; SMIT, K; VANDERGUGTEN, J; KOOLHAAS, JM

    1988-01-01

    Behavioral and physiological responses of 18 chronically cannulated male TMD-S3 rats were assessed during various social interactions with conspecifics, both with and without the possibility for physical contact (social vs. psychosocial stimulation). Response magnitudes (behavior, blood pressure, pl

  15. Home and ambulatory blood pressure monitoring: when? who?

    Science.gov (United States)

    Kantarci, Gülçin

    2013-12-01

    Blood pressure measurement in the diagnosis and management of hypertension, including the technique required for ambulatory blood pressure monitoring and home blood pressure monitoring, will be reviewed in this article. Home and ambulatory measurements are widely used, both to confirm the diagnosis and to improve adherence to therapy. The major advantage of out-of-office blood pressure monitoring is that it provides a large number of blood pressure measurements away from the medical environment, which represents a more reliable assessment of actual blood pressure than office blood pressure. The advantage of ambulatory blood pressure monitoring is its unique ability to measure nocturnal blood pressure. Although not fully validated in large-scale clinical trials, ambulatory blood pressure monitoring appears to correlate best with prognosis. Ambulatory blood pressure monitoring and home blood pressure monitoring provide somewhat different information on the subject's blood pressure status, and the two methods should thus be regarded as complementary, rather than competitive or alternative. PMID:25019016

  16. Non-Invasive measurement of blood pressure - Why we should look at BP traces rather than listen to Korotkoff sounds.

    Science.gov (United States)

    Celler, Branko G; Basilakis, Jim; Goozee, Kathryn; Ambikairajah, Eliathamby

    2015-08-01

    Accurate non-invasive measurement of blood pressure in unsupervised environments continues to be a challenge, particularly in the presence of movement artefact, electrical noise and most importantly cardiac arrhythmia which are common in those aged over 65 suffering from a range of chronic conditions. Large intra personal variability in signal morphometry and amplitudes further complicates the development of reliable signal processing algorithms for NIBP measurement. In this paper we demonstrate the effect of this variability and propose that the traditional methods of human blood pressure determination by sphygmomanometry should no longer be considered a gold standard for the calibration of NIBP devices. PMID:26737650

  17. Stroke and High Blood Pressure

    Science.gov (United States)

    ... Pressure Tools & Resources Stroke More Stroke and High Blood Pressure Updated:Jan 6,2015 Stroke is a leading ... heart disease and stroke. Start exploring today ! High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  18. Potassium and High Blood Pressure

    Science.gov (United States)

    ... Pressure Tools & Resources Stroke More Potassium and High Blood Pressure Updated:Mar 1,2016 A diet that includes ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  19. Myths about High Blood Pressure

    Science.gov (United States)

    ... Pressure Tools & Resources Stroke More Myths About High Blood Pressure Updated:Aug 12,2014 You CAN manage your ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) Introduction What ...

  20. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... pressure. Using the results of your blood pressure test, your health care provider will diagnose prehypertension or high blood pressure ... same age, gender, and height . Once your health care provider ... he or she can order additional tests to determine if your blood pressure is due ...

  1. From Korotkoff and Marey to automatic non-invasive oscillometric blood pressure measurement: does easiness come with reliability?

    Science.gov (United States)

    Benmira, A; Perez-Martin, A; Schuster, I; Aichoun, I; Coudray, S; Bereksi-Reguig, F; Dauzat, M

    2016-01-01

    The auscultatory technique remains the point of reference for the validation of non-invasive blood pressure measurement devices, although the exact origin of the Korotkoff sounds is still debated and comparison with intra-arterial measurement shows limits and pitfalls. Automatic oscillometric devices are now widely used by nurses, physicians, and patients. However, many available devices have not been duly validated. Moreover, they calculate systolic and diastolic blood pressures using undisclosed algorithms. Therefore, these devices are not interchangeable, and their reliability may be questionable in some clinical situations. Nevertheless, oscillometry is increasingly used, beside NIBP, for the assessment of central blood pressure and systemic arterial wall stiffness. Awareness of its limits and causes of error is all the more necessary. PMID:26641026

  2. Interarm difference in blood pressure

    DEFF Research Database (Denmark)

    Mehlsen, Jesper; Wiinberg, Niels

    2014-01-01

    The present study aimed at examining the interarm difference in blood pressure and its use as an indicator of peripheral arterial disease (PAD). Data were included from consecutive patients referred from their general practitioner to our vascular laboratory for possible PAD aged 50 years or older...... without known cardiac disease, renal disease, or diabetes mellitus. 824 patients (453 women) with mean age of 72 years (range: 50-101) were included. 491 patients had a diagnosis of hypertension and peripheral arterial disease (PAD) was present in 386 patients. Systolic blood pressure was 143 ± 24 mm......Hg and 142 ± 24 mmHg on the right and left arm, respectively (P = 0.015). The interarm difference was greater in patients with hypertension (P = 0.002) and PAD (P < 0.0005). 443 patients were measured on two separate occasions and the interarm difference for systolic blood pressure was reproducible for...

  3. Derivation of a measure of systolic blood pressure mutability: a novel information theory-based metric from ambulatory blood pressure tests.

    Science.gov (United States)

    Contreras, Danitza J; Vogel, Eugenio E; Saravia, Gonzalo; Stockins, Benjamin

    2016-03-01

    We provide ambulatory blood pressure (BP) exams with tools based on information theory to quantify fluctuations thus increasing the capture of dynamic test components. Data from 515 ambulatory 24-hour BP exams were considered. Average age was 54 years, 54% were women, and 53% were under BP treatment. The average systolic pressure (SP) was 127 ± 8 mm Hg. A data compressor (wlzip) designed to recognize meaningful information is invoked to measure mutability which is a form of dynamical variability. For patients with the same average SP, different mutability values are obtained which reflects the differences in dynamical variability. In unadjusted linear regression models, mutability had low association with the mean systolic BP (R(2) = 0.056; P < .000001) but larger association with the SP deviation (R(2) = 0.761; P < .001). Wlzip allows detecting levels of variability in SP that could be hazardous. This new indicator can be easily added to the 24-hour BP monitors improving information toward diagnosis. PMID:26965751

  4. Non-invasive blood pressure measurement: values, problems and applicability in the common marmoset (Callithrix jacchus).

    Science.gov (United States)

    Mietsch, M; Einspanier, A

    2015-07-01

    The common marmoset (Callithrix jacchus, C. j.) is an established primate model in biomedical research and for human-related diseases. Monitoring of cardiovascular parameters including blood pressure (BP) is important for the health surveillance of these experimental animals and the quantification of diseases or pharmaceutical substances influencing BP. Measurement guidelines for C. j. do not exist yet; therefore, the present study was carried out to establish a practicable protocol based on recommendations of the American College of Veterinary Internal Medicine (ACVIM). Furthermore, BP data of 49 marmosets (13.8-202.4 months of age) were obtained via high-definition oscillometry to further knowledge of physiological parameters and gender-related differences in this primate. The thighs proved to be the most suitable measurement localization, since systolic values were less variable (left 4.03 ± 2.90%, right 5.96 ± 2.77%) compared with the tail (12.7 ± 6.96%). BP values were similar in the morning and in the afternoon (P > 0.05). Data were highly reproducible within and between several sessions on three consecutive days (P > 0.05) as well as over the course of 20 months (P > 0.05). Furthermore, the measurement time for females was significantly shorter than for males (5:14 ± 1:59 min versus 6:50 ± 1:58 min, P = 0.007). Measurement recommendations for the common marmoset were successfully established. Standardized values enabled a reliable comparison of BP parameters, e.g. for cardiovascular, toxicological or metabolic research. PMID:25552521

  5. Reliability of the Dinamap non-invasive monitor in the measurement of blood pressure of ill Asian newborns.

    Science.gov (United States)

    Chia, F; Ang, A T; Wong, T W; Tan, K W; Fung, K P; Lee, J; Khin, K

    1990-05-01

    Four hundred thirty-one paired sets of readings of systolic and diastolic blood pressure and 438 paired sets of readings of mean arterial BP from 49 ill newborns, including 21 very low birth weight infants, were analyzed for the extent and pattern of agreement and the linear relationship between the Dinamap oscillometric monitor and the direct intraarterial blood pressure readings. Agreement between the two methods was measured by the intraclass correlation, whereas the linear relationship was assessed by the product-moment correlation. The intraclass correlations for systolic, diastolic and mean blood pressures were 0.696, 0.766, and 0.781, respectively. The product-moment correlations for systolic, diastolic and mean blood pressures were 0.706, 0.768, and 0.786, respectively. BP measurements by the Dinamap monitor showed reasonably close agreement to those obtained by the intraarterial mean arterial pressure ranges above 40 mmHg. For mean arterial pressure of 40 mmHg and lower, BP readings by the Dinamap monitor tended to be higher than those obtained by the intraarterial method. These findings appeared to be consistent regardless of the birth weight of the newborn. PMID:2340688

  6. Closure of digital arteries in high vascular tone states as demonstrated by measurement of systolic blood pressure in the fingers

    DEFF Research Database (Denmark)

    Krähenbühl, B; Nielsen, S L; Lassen, N A

    1977-01-01

    Finger systolic blood pressure (FSP) was measured indirectly in normal subjects and patients with primary Raynaud phenomenon by applying a thin-walled plastic cuff around the finger and a strain gauge more distally to detect volume changes. Inducing a high vascular tone in one or more fingers by...... direct cooling or intra-arterial noradrenaline infusion caused a marked drop in FSP in the exposed fingers, but not in the non-exposed fingers of the same hand. The fact that the non-exposed fingers retained the normal (arm systolic) pressure level is taken to indicate that palmar arch blood pressure...... also remained normal. In the high vascular tone state, a large transmural pressure difference must apparently be established before the digital arteries are forced open. The lowered opening pressure constitutes a manifestation of the closure phenomenon of the digital arteries described in patients with...

  7. Blood Pressure Percentiles for School Children

    OpenAIRE

    İsmail Özanli; Sebahat Tülpar; Yunus Yılmaz; Fatih Yıldız

    2016-01-01

    Objective: The prevalence of hypertension in childhood and adolescence is gradually increasing. We aimed to in­vestigate the blood pressure (BP) values of children aged 7-18 years. Methods: This study was conducted in a total of 3375 (1777 females, 1598 males) children from 27 schools. Blood pressures of children were measured using sphyg­momanometer appropriate to arm circumference. Results: A positive relationship was found between sys­tolic blood pressure (SBP) and diastolic blood pr...

  8. Home blood pressure monitoring for mild hypertensives.

    OpenAIRE

    Midanik, L T; Resnick, B; Hurley, L B; Smith, E J; Mccarthy, M.

    1991-01-01

    A clinical trial of 204 untreated patients with mild hypertension was conducted to assess the effect of home blood pressure monitoring on blood pressure level, pharmacologic treatment, reduction of risk factors, and use of health services. After 1 year, no statistically significant differences were found between the treatment and control groups. The findings indicate that, while home blood pressure monitoring may be useful, it has no measurable short-term impact on these aspects of blood pres...

  9. Predicting Out-of-Office Blood Pressure in the Clinic (PROOF-BP): Derivation and Validation of a Tool to Improve the Accuracy of Blood Pressure Measurement in Clinical Practice.

    Science.gov (United States)

    Sheppard, James P; Stevens, Richard; Gill, Paramjit; Martin, Una; Godwin, Marshall; Hanley, Janet; Heneghan, Carl; Hobbs, F D Richard; Mant, Jonathan; McKinstry, Brian; Myers, Martin; Nunan, David; Ward, Alison; Williams, Bryan; McManus, Richard J

    2016-05-01

    Patients often have lower (white coat effect) or higher (masked effect) ambulatory/home blood pressure readings compared with clinic measurements, resulting in misdiagnosis of hypertension. The present study assessed whether blood pressure and patient characteristics from a single clinic visit can accurately predict the difference between ambulatory/home and clinic blood pressure readings (the home-clinic difference). A linear regression model predicting the home-clinic blood pressure difference was derived in 2 data sets measuring automated clinic and ambulatory/home blood pressure (n=991) using candidate predictors identified from a literature review. The model was validated in 4 further data sets (n=1172) using area under the receiver operator characteristic curve analysis. A masked effect was associated with male sex, a positive clinic blood pressure change (difference between consecutive measurements during a single visit), and a diagnosis of hypertension. Increasing age, clinic blood pressure level, and pulse pressure were associated with a white coat effect. The model showed good calibration across data sets (Pearson correlation, 0.48-0.80) and performed well-predicting ambulatory hypertension (area under the receiver operator characteristic curve, 0.75; 95% confidence interval, 0.72-0.79 [systolic]; 0.87; 0.85-0.89 [diastolic]). Used as a triaging tool for ambulatory monitoring, the model improved classification of a patient's blood pressure status compared with other guideline recommended approaches (93% [92% to 95%] classified correctly; United States, 73% [70% to 75%]; Canada, 74% [71% to 77%]; United Kingdom, 78% [76% to 81%]). This study demonstrates that patient characteristics from a single clinic visit can accurately predict a patient's ambulatory blood pressure. Usage of this prediction tool for triaging of ambulatory monitoring could result in more accurate diagnosis of hypertension and hence more appropriate treatment. PMID:27001299

  10. Sitting and standing blood pressure measurements are not accurate for the diagnosis of orthostatic hypotension.

    LENUS (Irish Health Repository)

    Cooke, J

    2012-01-31

    INTRODUCTION: Orthostatic hypotension (OH) is associated with troublesome symptoms and increased mortality. It is treatable and deserving of accurate diagnosis. This can be time consuming. The current reference standard for its diagnosis is head-up tilt (HUT) testing with continuous beat-to-beat plethysmography. Our objective was to assess the accuracy of sit-stand testing with semi-automatic sphygmomanometry for the diagnosis of OH. DESIGN: Retrospective test of diagnostic accuracy. METHODS: This was a retrospective study performed using a database maintained by a busy syncope unit. HUT testing was performed using an automated tilt table with Finometer monitoring. A 3 min 70 degrees HUT was performed following 5 min supine. Sitting blood pressure (BP) was measured following 3 min rest. Standing BP was measured within 30 s of assuming the upright posture. The results of sit-stand testing were compared with HUT testing as a reference standard. Both tests happened within 5 min of each other and patients underwent no intervention between tests. RESULTS: From a total of 1452 consecutive HUTs, we identified 730 with pre-test measures of sitting and standing BP. The mean age of this group was 70.57 years (SD = 15.1), 62% were female. The sensitivity of sit-stand testing was calculated as 15.5%, specificity as 89.9%, positive predictive value as 61.7%, negative predictive value as 50.2% and the likelihood ratio as 1.6. The area under the Receiver Operator Curve was 0.564. CONCLUSION: We have demonstrated that sit-stand testing for OH has very low diagnostic accuracy. We recommend that the more time-consuming reference standard method of diagnosis be used if the condition is suspected.

  11. Roll-over test--errors in interpretation, due to inaccurate blood pressure measurements.

    Science.gov (United States)

    Schoenfeld, A; Ziv, I; Tzeel, A; Ovadia, J

    1985-01-01

    In order to make the earliest possible prediction of the type of woman likely to develop pregnancy-induced hypertension (PIH), one hundred and ninety-six primigravidas underwent a roll-over test (ROT) during wk 28-32 of their pregnancy. Blood pressure (BP) readings were taken with a standard 12 cm cuff as well as with cuffs adapted to various arm circumferences. We found that the prediction rate of ROT readings with a standard 12 cm cuff was relatively low (38.5%) as compared with Gant's study (94%) (Amer. J. Obstet. Gynec., 120 (1974) 1). When a suitably sized cuff was used, the prediction rate dropped (to 14.7%). Data analysis at term for the whole population of this study shows that, by measuring with a standard 12 cm cuff, 10.2% of the women were found to have PIH, whereas measuring with a suitable cuff showed PIH in only 2.55% of the cases (1:4 ratio). We suggest that the low prediction rates in this and other studies demonstrate that the ROT test is not sufficiently reliable as a tool for predicting which women are liable to develop PIH, but there is definitely enough in it to predict which group will not develop PIH (in this study 89-93%). It has been recommended that ROT be considered only as a test of possible reliability. It should be done according to proper criteria for BP measuring, and a repeat ROT should be considered after several days before starting any kind of treatment. PMID:3979651

  12. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... above. Confirming High Blood Pressure A blood pressure test is easy and painless and can be done ... provider’s office or clinic. To prepare for the test: Don’t drink coffee or smoke cigarettes for ...

  13. High blood pressure and diet

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/article/007483.htm High blood pressure and diet To use the sharing features on ... diet is a proven way to help control high blood pressure . These changes can also help you lose weight ...

  14. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... track blood pressure readings over a period of time, the health care provider may ask you to ... the office on different days and at different times to take your blood pressure. The health care ...

  15. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... visit the health care provider, he or she should tell you what your blood pressure numbers are; if he or she does not, you should ask for your readings. Blood Pressure Severity and ...

  16. High Blood Pressure in Pregnancy

    Science.gov (United States)

    ... of the baby. Controlling your blood pressure during pregnancy and getting regular prenatal care are important for ... your baby. Treatments for high blood pressure in pregnancy may include close monitoring of the baby, lifestyle ...

  17. Genes That Influence Blood Pressure

    Science.gov (United States)

    ... Research Matters NIH Research Matters September 26, 2011 Genes that Influence Blood Pressure In one of the ... 16 previously unknown variations. Six were found in genes already suspected of regulating blood pressure. The remaining ...

  18. Method specificity of non-invasive blood pressure measurement: oscillometry and finger pulse pressure vs acoustic methods.

    Science.gov (United States)

    De Mey, C; Schroeter, V; Butzer, R; Roll, S; Belz, G G

    1995-10-01

    1. The agreement of blood pressure measurements by stethoscope auscultation (SBPa, DBPa-IV and DBPa-V), oscillometry (Dinamap; SBPo, and DBPo) and digital photoplethysmography (Finapres; SBPf, and DBPf) with the graphical analysis of the analogue microphone signals of vascular wall motion sound (SBPg and DBPg) was evaluated in eight healthy subjects in the presence of responses to the intravenous infusion of 1 microgram min-1 isoprenaline. 2. In general, there was good agreement between the SBP/DBP-measurements based on auscultatory Korotkoff-I- and IV-criteria and the reference method; the average method difference in estimating the isoprenaline responses for SBPa-SBPg was: -1.1, 95% CI: -5.4 to 3.1 mm Hg with a within-subject between-method repeatability coefficient (REP) of 11.6 mm Hg and for DBPa-IV-DBPg: 3.5, 95% CI: -0.5 to 6.5 mm Hg, REP: 11.5 mm Hg. The ausculatation of Korotkoff-V substantially overestimated the isoprenaline induced reduction of DBP: method difference DBPa-V-DBPg: -11.3, 95% CI: -17.8 to -4.7 mm Hg, REP: 31.8 mm Hg. 3. Oscillometry yielded good approximations for the SBP response to isoprenaline (average method difference SBPo-SBPg: -2.9, 95% CI: -9.0 to 3.3 mm Hg, REP: 17.6 mm Hg) but was poorly sensitive with regard to the DBP responses: method difference DBPo-DBPg: 6.5, 95% CI: -1.3 to 14.3 mm Hg, REP: 25.7 mm Hg. 4. Whilst the finger pulse pressure agreed well with regard to DBP (method difference for the DBP responses to isoprenaline: DBPf-DBPg: 1.8, 95% CI: -5.1 to 8.6 mm Hg, REP: 18.5 mm Hg) it was rather unsatisfactory with regard to SBP (method difference SBPf-SBPg: -14.1, 95% CI: -28.2 to -0.1 mm Hg, REP: 49.9 mm Hg).(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8554929

  19. Disparate estimates of hypertension control from ambulatory and clinic blood pressure measurements in hypertensive kidney disease.

    Science.gov (United States)

    Pogue, Velvie; Rahman, Mahboob; Lipkowitz, Michael; Toto, Robert; Miller, Edgar; Faulkner, Marquetta; Rostand, Stephen; Hiremath, Leena; Sika, Mohammed; Kendrick, Cynthia; Hu, Bo; Greene, Tom; Appel, Lawrence; Phillips, Robert A

    2009-01-01

    Ambulatory blood pressure (ABP) monitoring provides unique information about day-night patterns of blood pressure (BP). The objectives of this article were to describe ABP patterns in African Americans with hypertensive kidney disease, to examine the joint distribution of clinic BP and ABP, and to determine associations of hypertensive target organ damage with clinic BP and ABP. This study is a cross-sectional analysis of baseline data from the African American Study of Kidney Disease Cohort Study. Masked hypertension was defined by elevated daytime (>or= 135/85 mm Hg) or elevated nighttime (>or= 120/70 mm Hg) ABP in those with controlled clinic BP (disease, in large part because of increased nighttime BP. Whether lowering nighttime BP improves clinical outcomes is unknown but should be tested given the substantial burden of BP-related morbidity in this population. PMID:19047584

  20. High Definition Oscillometry: Non-invasive Blood Pressure Measurement and Pulse Wave Analysis.

    Science.gov (United States)

    Egner, Beate

    2015-01-01

    Non-invasive monitoring of blood pressure has become increasingly important in research. High-Definition Oscillometry (HDO) delivers not only accurate, reproducible and thus reliable blood pressure but also visualises the pulse waves on screen. This allows for on-screen feedback in real time on data validity but even more on additional parameters like systemic vascular resistance (SVR), stroke volume (SV), stroke volume variances (SVV), rhythm and dysrhythmia. Since complex information on drug effects are delivered within a short period of time, almost stress-free and visible in real time, it makes HDO a valuable technology in safety pharmacology and toxicology within a variety of fields like but not limited to cardiovascular, renal or metabolic research. PMID:26091643

  1. Thirty years of research on diagnostic and therapeutic thresholds for the self-measured blood pressure at home.

    NARCIS (Netherlands)

    Staessen, J.A.; Thijs, L.; Ohkubo, T.; Kikuya, M.; Richart, T.; Boggia, J.; Adiyaman, A.; Dechering, D.G.; Kuznetsova, T.; Thien, Th.; Leeuw, P de; Imai, Y.; O'brien, E.; Parati, G.

    2008-01-01

    OBJECTIVE: The goal of this review study is to summarize 30 years of research on cut-off limits for the self-measured blood pressure. METHODS: We reviewed two meta-analyses, several prospective outcome studies in populations and hypertensive patients, studies in pregnant women, three clinical trials

  2. Influence of vagus nerve stimulator to systemic blood pressure and heart rate measurement

    Czech Academy of Sciences Publication Activity Database

    Jurák, Pavel; Kára, T.; Halámek, Josef; Kuba, R.; Chládek, Jan; Vondra, Vlastimil

    Liptovský Mikuláš : Vojenská Akadémia FZV, 2002 - (Puttera, J.), s. 96 - 99 ISBN 80-8040-180-2. [KTERP. Tatranské Zruby (SK), 24.04.2002-26.04.2002] R&D Projects: GA ČR GA102/00/1262 Institutional research plan: CEZ:AV0Z2065902 Keywords : Vagus Nerve Stimulation * heart rate * blood pressure Subject RIV: FA - Cardiovascular Diseases incl. Cardiotharic Surgery

  3. Continuous estimates of dynamic cerebral autoregulation: influence of non-invasive arterial blood pressure measurements

    International Nuclear Information System (INIS)

    Temporal variability of parameters which describe dynamic cerebral autoregulation (CA), usually quantified by the short-term relationship between arterial blood pressure (BP) and cerebral blood flow velocity (CBFV), could result from continuous adjustments in physiological regulatory mechanisms or could be the result of artefacts in methods of measurement, such as the use of non-invasive measurements of BP in the finger. In 27 subjects (61 ± 11 years old) undergoing coronary artery angioplasty, BP was continuously recorded at rest with the Finapres device and in the ascending aorta (Millar catheter, BPAO), together with bilateral transcranial Doppler ultrasound in the middle cerebral artery, surface ECG and transcutaneous CO2. Dynamic CA was expressed by the autoregulation index (ARI), ranging from 0 (absence of CA) to 9 (best CA). Time-varying, continuous estimates of ARI (ARI(t)) were obtained with an autoregressive moving-average (ARMA) model applied to a 60 s sliding data window. No significant differences were observed in the accuracy and precision of ARI(t) between estimates derived from the Finapres and BPAO. Highly significant correlations were obtained between ARI(t) estimates from the right and left middle cerebral artery (MCA) (Finapres r = 0.60 ± 0.20; BPAO r = 0.56 ± 0.22) and also between the ARI(t) estimates from the Finapres and BPAO (right MCA r = 0.70 ± 0.22; left MCA r = 0.74 ± 0.22). Surrogate data showed that ARI(t) was highly sensitive to the presence of noise in the CBFV signal, with both the bias and dispersion of estimates increasing for lower values of ARI(t). This effect could explain the sudden drops of ARI(t) to zero as reported previously. Simulated sudden changes in ARI(t) can be detected by the Finapres, but the bias and variability of estimates also increase for lower values of ARI. In summary, the Finapres does not distort time-varying estimates of dynamic CA obtained with a sliding window combined with an ARMA model, but

  4. DIASTOLIC BLOOD PRESSURE OR ACTUALLY IT IS BASELINE SYSTOLIC BLOOD PRESSURE?

    OpenAIRE

    R.Vinodh Rajkumar

    2015-01-01

    Blood pressure measuring represents a routine investigation in general medicine. Nokolai Korotkoff was only 31 years old when he made a short presentation to the Scientific Meeting of the Military Hospital of the Academy on 5 November 1905 concerning an easy non-invasive method of blood pressure (BP) measurement, entitled ‘Concerning the problems of the methods of blood pressure measurement’. If the pressure in the cuff is relieved, blood starts coming through the compressed arterial segment...

  5. A New Cuffless Device for Measuring Blood Pressure: A Real-Life Validation Study

    Science.gov (United States)

    Schoot, Tessa S; Weenk, Mariska; van de Belt, Tom H; Engelen, Lucien JLPG; van Goor, Harry

    2016-01-01

    Background Cuffless blood pressure (BP) monitoring devices, based on pulse transit time, are being developed as an easy-to-use, more convenient, fast, and relatively cheap alternative to conventional BP measuring devices based on cuff occlusion. Thereby they may provide a great alternative to BP self-measurement. Objective The objective of our study was to evaluate the performance of the first release of the Checkme Health Monitor (Viatom Technology), a cuffless BP monitor, in a real-life setting. Furthermore, we wanted to investigate whether the posture of the volunteer and the position of the device relative to the heart level would influence its outcomes. Methods Study volunteers fell into 3 BP ranges: high (>160 mmHg), normal (130–160 mmHg), and low (International Protocol (ESH-IP) for the validation of BP measurement devices. After calibrating the Checkme device, we measured systolic BP with Checkme and a validated, oscillometric reference BP monitor (RM). Measurements were performed in randomized order both in supine and in sitting position, and with Checkme at and above heart level. Results We recruited 52 volunteers, of whom we excluded 15 (12 due to calibration failure with Checkme, 3 due to a variety of reasons). The remaining 37 volunteers were divided into low (n=14), medium (n=13), and high (n=10) BP ranges. There were 18 men and 19 women, with a mean age of 54.1 (SD 14.5) years, and mean recruitment systolic BP of 141.7 (SD 24.7) mmHg. BP results obtained by RM and Checkme correlated well. In the supine position, the difference between the RM and Checkme was >5 mmHg in 17 of 37 volunteers (46%), of whom 9 of 37 (24%) had a difference >10 mmHg and 5 of 37 (14%) had a difference >15 mmHg. Conclusions BP obtained with Checkme correlated well with RM BP, particularly in the position (supine) in which the device was calibrated. These preliminary results are promising for conducting further research on cuffless BP measurement in the clinical and

  6. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Diagnosis of High Blood Pressure For most patients, health care providers diagnose high blood pressure when blood pressure ... and painless and can be done in a health care provider’s office or clinic. To prepare for the ...

  7. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... page from the NHLBI on Twitter. Diagnosis of High Blood Pressure For most patients, health care providers diagnose high ... are consistently 140/90 mmHg or above. Confirming High Blood Pressure A blood pressure test is easy and painless ...

  8. Living with High Blood Pressure

    Science.gov (United States)

    ... from the NHLBI on Twitter. Living With High Blood Pressure If you have high blood pressure, the best thing to do is to talk ... care provider and take steps to control your blood pressure by making healthy lifestyle changes and taking medications, ...

  9. Biofeedback With Implanted Blood-Pressure Device

    Science.gov (United States)

    Rischell, Robert E.

    1988-01-01

    Additional uses found for equipment described in "Implanted Blood-Pressure-Measuring Device" (GSC-13042). Implanted with device electronic circuitry that measures, interprets, and transmits data via inductive link through patient's skin to external receiver. Receiver includes audible alarm generator activated when patient's blood pressure exceeds predetermined threshold. Also included in receiver a blood-pressure display, recorder, or both, for use by patient or physician.

  10. High Blood Pressure and Kidney Disease

    Science.gov (United States)

    ... to Remember Clinical Trials What is high blood pressure? Blood pressure is the force of blood pushing against ... filtering units called nephrons. [ Top ] How does high blood pressure affect the kidneys? High blood pressure can damage ...

  11. High Blood Pressure (Hypertension) (For Parents)

    Science.gov (United States)

    ... lead an active, normal life. What Is Blood Pressure? Blood pressure is the force that blood puts on ... and medications. continue Long-Term Effects of High Blood Pressure When someone has high blood pressure, the heart ...

  12. Indirect arterial blood pressure measurement in healthy anesthetized cats using a device that combines oscillometry with photoplethysmography.

    Science.gov (United States)

    Heishima, Yasuhiro; Hori, Yasutomo; Chikazawa, Seishiro; Kanai, Kazutaka; Hoshi, Fumio; Itoh, Naoyuki

    2016-08-01

    We investigated the basic characteristics of indirect arterial blood pressure (ABP) measurement using a device that combines oscillometry and photoplethysmography in cats. Dobutamine was infused intravenously in four anesthetized cats. Direct ABP was measured by a catheter. Indirect ABP was measured from the left forelimb. Dobutamine significantly elevated both systolic arterial pressure (SAP) and mean arterial pressure (MAP) in a dose-dependent manner. The indirect SAP, MAP and diastolic arterial pressure (DAP) values were closely correlated with the direct ABP values (r=0.88, 0.89 and 0.83, respectively). The mean bias for SAP, MAP and DAP was 3.4, 0.2 and -2.4 mmHg, respectively. The indirect ABP measured by this device may be used to reliably monitor ABP changes in anesthetized cats. PMID:27003226

  13. Opportunistic screening of atrial fibrillation by automatic blood pressure measurement in the community

    Science.gov (United States)

    Omboni, Stefano; Verberk, Willem J

    2016-01-01

    Objective Timely detection of atrial fibrillation (AF) may effectively prevent cardiovascular consequences. However, traditional diagnostic tools are either poorly reliable (pulse palpation) or not readily accessible (ECG) in general practice. We tested whether an automatic oscillometric blood pressure (BP) monitor embedded with an algorithm for AF detection might be effective for opportunistic screening of asymptomatic AF in the community. Setting A community-based screening campaign in an unselected population to verify the feasibility of AF screening with a Microlife WatchBP Office BP monitor with a patented AFIB algorithm. When possible AF was detected (≥2 of 3 BP measurements reporting AF), a doctor immediately performed a single-lead ECG in order to confirm or exclude the presence of the arrhythmia. The main demographic and clinical data were also collected. Participants 220 consecutive participants from an unselected sample of individuals in a small Italian community. Primary and secondary outcome measures Number of patients detected with AF and diagnosed risk factors for AF. Results In 12 of 220 participants, the device detected possible AF during the BP measurement: in 4 of them (1.8%), the arrhythmia was confirmed by the ECG. Patients with AF were more likely to be older (77.0±1.2 vs 57.2±15.2 years, p=0.010), obese (50.0 vs 14.4%, p=0.048) and to suffer from a cardiovascular disease (50.0 vs 10.6%, p=0.014) than patients without AF. Participants with a positive BP AF reading and non-AF arrhythmias (n=8) did not differ in their general characteristics from participants with a negative BP AF reading and were younger than patients with AF (mean age 56.4±14.8, p=0.027; 5 of 8 participants aged <65 years). Conclusions Opportunistic screening of AF by BP measurement is feasible to diagnose this arrhythmia in unaware participants, particularly in those older than 65 years, who are the target patient group recommended by current AF screening

  14. Gingival blood flow under total combs by functional pressure evaluated with laser-Doppler flowmetry, a non-invasive method of blood flow measurement

    International Nuclear Information System (INIS)

    Gingival blood flow under total-combs by functional pressure evaluated with Laser-Doppler Flowmetry, a non-invasive method of blood flow measurement. Microcirculation of gum's capillary system can be measured non-invasive by Laser-Doppler-Flowmetry (LDF). Circulation, defined by the number of floating erythrocytes per unit of time, is measured by a fibro-optical Laser-Doppler-Flowmetry. The task was to examine, if there is any change of gum's circulation during strain and relief. Circulation on defined measurepoints, divided on the four quadrants, was determined among maximal strain and subsequent relief, on one probationer (complete denture bearer). Before every measure session systemic pressure was taken. LDF-value was taken on top of jaw-comb, in doing so, to get reproducible result and a satisfying fixation of the probe, there was made an artificial limb of the upper and lower comb. In the upper comb a dynamometer-box, which determined minimal and maximal comb pressure, was integrated. The received results of the LDF-measurement, expressed as perfusion units (PU) were lower under applied pressure than by pressure points more distant. Hyperemia, resulting during relief, seemed the more intense, the less perfusion was before. This new, non-invasive kind of circulation measurement seems to be quite predestined to be used for gingival diagnostic under artificial limb in the future. (author)

  15. Validation of the integration of technology that measures additional “vascular” indices into an ambulatory blood pressure monitoring system

    OpenAIRE

    Kotovskaya, Yulia V; Kobalava, Zhanna D; Orlov, Artemy V

    2014-01-01

    Background The objective of this study was to validate the novel integration of oscillometric (Vasotens®) technology into a BPLab® ambulatory blood pressure (BP) monitoring system to measure central BP, the aortic augmentation index, and pulse wave velocity (PWV) compared with the recommended and widely accepted tonometric method. Methods The ARTERY Society guidelines for comparison of PWV measurement techniques were used as the basis for recruitment of 99 individuals (mean age 44±19 years, 5...

  16. Feasibility of using a lightweight context-aware system for facilitating reliable home blood pressure self-measurements

    DEFF Research Database (Denmark)

    Kusk, Karina; Nielsen, D B; Thylstrup, Troels;

    2013-01-01

    Blood pressure self-measurement requires the patient to follow a range of recommendations in order to be considered valid for diagnostic use. We investigated how a lightweight and context-aware system designed for sensing and correcting incorrect usage of home blood pressure self......-measurement devices was perceived by a group of four patients. We found that using a context-aware system for improving adherence is feasible for overcoming the challenges related to moving from the supervised clinical setting to the unsupervised home setting. We also found that patients are willing to accept more...... advanced monitoring systems and increased surveillance, as long as it is only used during self-measurement periods and is proportional to the severity of the disease...

  17. [Ambulatory invasive and noninvasive blood pressure monitoring].

    Science.gov (United States)

    Bachmann, K; Wortmann, A; Engels, G

    1989-08-01

    Indirect arterial blood pressure measurement has not changed substantially since its introduction by Riva-Rocci in 1986, Korotkoff in 1905 and Recklinghausen in 1906. Random measurements in the clinic or practice reflect only incompletely the dynamic nature of the blood pressure. Blood pressure recordings by patients themselves have provided more information through better temporal resolution, however, exact characterization of the pressure response throughout the entire day and, in particular, during physical exertion are not enabled; the latter are especially important with regard to diagnosis and treatment of hypertension. In 1966, therefore, radiotelemetric transmission of direct, continuously-measured arterial blood pressure was developed which enabled beat-to-beat registration of blood pressure, outside the laboratory, during normal daily life and sport activities. The initial results showed a marked variability of the blood pressure during the course of the day (Figure 1). Excessive blood pressure increases were observed during exposure to cold, static and dynamic exercise and to a lesser degree during automobile driving and exposure to heat (Figure 3). Recording of the pressure curves via transmission by radiotelemetry shows a high degree of accuracy and temporal resolution, spatial and situational freedom but is invasive and costly in terms of personnel. The same holds true for direct continuous blood pressure registration and storage on a portable tape recorder. Portable, automatic blood pressure measuring units for ambulatory monitoring employ indirect auscultatory or oscillometric recording with a cuff. As compared with the radiotelemetric direct continuous blood pressure measuring method, the indirect method has subordinate temporal resolution, that is, the measurements are only intermittent.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:2676813

  18. Risk Factors for High Blood Pressure

    Science.gov (United States)

    ... the NHLBI on Twitter. Risk Factors for High Blood Pressure Anyone can develop high blood pressure; however, age, ... can increase your risk for developing high blood pressure. Age Blood pressure tends to rise with age. About 65 ...

  19. Healthy Blood Pressure: "It's Worth the Effort!"

    Science.gov (United States)

    ... please turn Javascript on. Special Section: Healthy Blood Pressure Healthy Blood Pressure: "It's worth the effort!" Past Issues / Winter 2010 ... Numbers: What They Mean / Treatment: Types of Blood Pressure Medications / Healthy Blood Pressure: "It's worth the effort!" / Keep the Beat ...

  20. Measurement of blood pressure in a thalidomide-impaired patient who required ovarian cystectomy: A case report

    OpenAIRE

    Shiga, Yuka; Nojiri, Fumiyo; Yoshizawa, Atsuto; Shimbo, Takuro; Kawachi, Shoji

    2014-01-01

    INTRODUCTION Thalidomide was available for use over-the-counter between 1958 and 1962, and more than 300 thalidomide-impaired people have been confirmed in Japan. Currently, thalidomide-impaired people are nearing the age of 50 years and sometimes require medical treatment or surgery. However, a sphygmomanometer cannot be used to measure the blood pressure in some thalidomide-impaired people because of upper-limb shortening or hypoplastic defects. We encountered a patient with thalidomide-rel...

  1. Validation of the integration of technology that measures additional “vascular” indices into an ambulatory blood pressure monitoring system

    OpenAIRE

    Kotovskaya YV; Kobalava ZD; Orlov AV

    2014-01-01

    Yulia V Kotovskaya,1 Zhanna D Kobalava,1 Artemy V Orlov21Propedeutics Department, Peoples’ Friendship University of Russia, 2Competitive System Analysis Department (No 65), National Research Nuclear University MEPhI, Moscow, RussiaBackground: The objective of this study was to validate the novel integration of oscillometric (Vasotens®) technology into a BPLab® ambulatory blood pressure (BP) monitoring system to measure central BP, the aortic augmentation index, and pulse wave ve...

  2. Home and ambulatory blood pressure monitoring: when? who?

    OpenAIRE

    Gülçin KANTARCI

    2013-01-01

    Blood pressure measurement in the diagnosis and management of hypertension, including the technique required for ambulatory blood pressure monitoring and home blood pressure monitoring, will be reviewed in this article. Home and ambulatory measurements are widely used, both to confirm the diagnosis and to improve adherence to therapy. The major advantage of out-of-office blood pressure monitoring is that it provides a large number of blood pressure measurements away from the medical environme...

  3. Segmental blood pressure after total hip replacement

    DEFF Research Database (Denmark)

    Gebuhr, Peter Henrik; Soelberg, M; Henriksen, Jens Henrik Sahl

    1992-01-01

    Twenty-nine patients due to have a total hip replacement had their systemic systolic and segmental blood pressures measured prior to operation and 1 and 6 weeks postoperatively. No patients had signs of ischemia. The segmental blood pressure was measured at the ankle and at the toes. A significant...... drop was found in all pressures 1 week postoperatively. The decrease followed the systemic pressure and was restored to normal after 6 weeks. In a group of six patients with preoperatively decreased ankle pressure, a significant transient further decrease in the ankle-toe gradient pressure was found...

  4. DIASTOLIC BLOOD PRESSURE OR ACTUALLY IT IS BASELINE SYSTOLIC BLOOD PRESSURE?

    Directory of Open Access Journals (Sweden)

    R.Vinodh Rajkumar

    2015-08-01

    Full Text Available Blood pressure measuring represents a routine investigation in general medicine. Nokolai Korotkoff was only 31 years old when he made a short presentation to the Scientific Meeting of the Military Hospital of the Academy on 5 November 1905 concerning an easy non-invasive method of blood pressure (BP measurement, entitled ‘Concerning the problems of the methods of blood pressure measurement’. If the pressure in the cuff is relieved, blood starts coming through the compressed arterial segment during systole and causes auscultatory sound and, the first sound, which, in Korotkoff’s opinion, is a measurement of systolic blood pressure. In the same BP measurement, when normal blood flow is fully restored, the auscultatory sounds disappear and, the last sound, which, in Korotkoff's opinion is a measurement of diastolic blood pressure. Listening to Korotkoff sounds (K-sounds to determine systolic and diastolic blood pressure (BP has been the standard for noninvasive BP measurement in medical practices for nearly 100 years and it is the essential tool used for evaluation and assessment of patients with hypertension and risks of cardiovascular diseases (CVD by physicians and nurses despite limited understanding of the nature of K-sounds. This article focuses particularly on the cardiovascular biomechanics of the first and last auscultatory sound and suggests two new terminologies; Highest systolic blood pressure and Baseline systolic blood pressure to represent the systolic pressure and diastolic pressure, respectively. Experimenting blood pressures on the basis of these two new suggested terminologies may reveal various additional undiscovered aspects of normal BP and abnormal BP. KEY WORDS: Highest systolic blood pressure, Baseline systolic blood pressure, Korotkoff sounds

  5. The accuracy of blood pressure measured by arterial line and non-invasive cuff in critically ill children

    OpenAIRE

    Joffe, Rachel; Duff, Jonathan; Garcia Guerra, Gonzalo; Pugh, Jodie; Ari R. Joffe

    2016-01-01

    Background The accuracy of arterial lines (AL) using the flush test or stopcock test has not been described in children, nor has the difference between invasive arterial blood pressure (IABP) versus non-invasive cuff (NIBP) blood pressure. Methods After ethics approval and consent, we performed the flush test and stopcock test on AL (to determine over damping, under damping, and optimal damping), and determined the difference (NIBP–IABP) in systolic, diastolic, and mean blood pressure (ΔSBP, ...

  6. 无创血压袖带缠绕方向和位置对血压测量的影响%Effect of winding direction and position of non-invasive blood pressure cuff on blood pressure measurement

    Institute of Scientific and Technical Information of China (English)

    刘新平; 王爱芹; 袁芳; 李智艳

    2012-01-01

    目的 探讨无创血压袖带缠绕方向和位置对血压测量的影响.方法 将96例危重患者进行自身对照研究,将传感器置于肱动脉上和上臂外侧,每次间隔5分钟,进行正向和反向测量血压,记录测量数值.结果 不同组间收缩压、舒张压和平均压总体比较差异无统计学意义(P> 0.05),进一步行各组间多重比较差异无统计学意义(P>0.05).结论 心电监护仪无创血压测量时,袖带的缠绕方向和位置不影响血压值的准确性.%Objective To explore the effects of the winding direction and position of noninvasive blood pressure cuff on blood pressure measurement.Methods A self-control study was conducted in 96 critically ill patients.We placed the sensor ofa sphygmomanometer on brachial artery and the lateral side of the upper arm, then measured blood pressure every 5 minutes in forward and reverse directions,and then documented the readings.Results The systolic pressure,diastolic pressure,and mean blood pressure did not differ significantly among different ( P> 0.05 ); multiple comparisons did not show significant differences ( P > 0.05 ).Conclusions The winding direction and location of noninvasive blood pressure cuff have no effects on the accuracy of blood measurement by using a ECG monitor.

  7. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... does not, you should ask for your readings. Blood Pressure Severity and Type Your health care provider usually takes 2–3 ... any other location. Health care providers diagnose this type of high blood pressure by reviewing readings in the office and ...

  8. Diabetes and blood pressure (image)

    Science.gov (United States)

    People with diabetes have a higher risk for heart attacks and strokes. Your doctor or nurse should check your blood pressure ... People with diabetes have a higher risk for heart attacks and strokes. Your doctor or nurse should check your blood pressure ...

  9. Blood presure measurement in LabVIEW

    OpenAIRE

    Pelikán, Ondřej

    2015-01-01

    The aim of this work is to design and create a product for automated measurement of blood pressure by auscultatory method by using a computer. Thesis contains a description of the blood pressure, also there are explained ways of its monitoring, basic rules for its measurement and the methods by which it is possible to measure blood pressure. In the practical part is described measuring system serving to measuring blood pressure by auscultatory method using a computer. There is also shown a de...

  10. A pressão arterial está sendo medida? Is the blood pressure being measured?

    Directory of Open Access Journals (Sweden)

    Débora C. Alavarce

    2000-03-01

    Full Text Available A medida da pressão arterial faz parte do exame físico e deve ser realizada em toda consulta médica. Para avaliar se a pressão arterial é medida nas consultas médicas, foram consultados 500 prontuários de pacientes de primeira consulta ambulatorial, sendo 335 (67% provenientes de clínicas médicas e cirúrgicas e 165 (33% das clínicas ginecológica e obstétrica. A pressão arterial foi anotada em 39% das consultas realizadas (135±32/85±19 mm Hg, sendo que em 11% destas anotações a pressão diastólica estava acima de 90 mm Hg. Em relação ao diagnóstico prévio de hipertensão arterial verificou-se que: a em 62% dos prontuários não havia esta informação; b 20% referiram ter hipertensão, e em 79% destes a pressão arterial foi anotada; e c 18% referiram não ter hipertensão e 46% destes tiveram registro da pressão arterial. Portanto, a maior parte dos pacientes não teve sua pressão arterial anotada.The blood pressure measure is part of the physical exam and it should be accomplished in every medical consultation. To verify the blood pressure measured in the accomplished medical consultations record of first they were consulted it consults 500 patient's ambulatorial being 335 (67% coming of medical and surgical clinics and 165 (33% of the gynecological and obstetric clinics. The blood pressure was written down in 39% of the accomplished consultations (135+32 mm Hg 85+19 mm Hg, and 11% of this annotations the pressure diastólica was above 90 mm Hg. In relation to the previous diagnosis of hypertension it was verified that: a in 62% of the records there was not this information; b 20% referred to have hypertension, and in 79% of these the arterial pressure was scored; and c 18% referred not to have hypertension and 46% of these had registration of the arterial pressure. Therefore, most of the patients didn't have its logged arterial pressure.

  11. The relationship of blood lead to systolic blood pressure in a longitudinal study of policemen.

    OpenAIRE

    Weiss, S T; Munoz, A.; Stein, A.; Sparrow, D.; Speizer, F E

    1988-01-01

    We examined the relationship of blood lead level to systolic and diastolic blood pressure in a longitudinal study of 89 Boston, MA, policemen. At the second examination blood lead level and blood pressure were measured in triplicate. Blood pressure measurements were taken in a similar fashion in years 3, 4, and 5. Multivariate analysis using a first-order autoregressive model revealed that after adjusting for previous systolic blood pressure, body mass index, age, and cigarette smoking, an el...

  12. High Blood Pressure Medicines

    Science.gov (United States)

    ... your blood to pass through more easily. Alpha-beta blockers not only reduce nerve impulses, but also make ... with less force. They combine the effects of beta blockers and alpha blockers. Angiotensin-converting enzyme inhibitors (also ...

  13. Low Blood Pressure

    Science.gov (United States)

    ... failure . Your heart may not be able to circulate enough blood to meet your body's needs. Endocrine ... related to heart disease and stroke. Start exploring today ! Related Tools HBP Risk Calculator HBP Trackers Videos ...

  14. Non-invasive method for the aortic blood pressure waveform estimation using the measured radial EBI

    International Nuclear Information System (INIS)

    The paper presents a method for the Central Aortic Pressure (CAP) waveform estimation from the measured radial Electrical Bio-Impedance (EBI). The method proposed here is a non-invasive and health-safe approach to estimate the cardiovascular system parameters, such as the Augmentation Index (AI). Reconstruction of the CAP curve from the EBI data is provided by spectral domain transfer functions (TF), found on the bases of data analysis. Clinical experiments were carried out on 30 patients in the Center of Cardiology of East-Tallinn Central Hospital during coronary angiography on patients in age of 43 to 80 years. The quality and reliability of the method was tested by comparing the evaluated augmentation indices obtained from the invasively measured CAP data and from the reconstructed curve. The correlation coefficient r = 0.89 was calculated in the range of AICAP values from 5 to 28. Comparing to the traditional tonometry based method, the developed one is more convenient to use and it allows long-term monitoring of the AI, what is not possible with tonometry probes.

  15. Segmental blood pressure after total hip replacement

    DEFF Research Database (Denmark)

    Gebuhr, Peter Henrik; Soelberg, M; Henriksen, Jens Henrik

    1992-01-01

    Twenty-nine patients due to have a total hip replacement had their systemic systolic and segmental blood pressures measured prior to operation and 1 and 6 weeks postoperatively. No patients had signs of ischemia. The segmental blood pressure was measured at the ankle and at the toes. A significant...... drop was found in all pressures 1 week postoperatively. The decrease followed the systemic pressure and was restored to normal after 6 weeks. In a group of six patients with preoperatively decreased ankle pressure, a significant transient further decrease in the ankle-toe gradient pressure was found on...... the operated side. None of the patients had symptoms from the lowered pressure. We conclude that in patients without signs of ischemia, the postoperative segmental pressure decrease is reversible and therefore not dangerous....

  16. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Budget, Planning, & Legislative Advisory Committees Contact Us FAQs Home » Health Information for the Public » Health Topics » High ... also may ask you to check readings at home or at other locations that have blood pressure ...

  17. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Explore High Blood Pressure What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments ... stress, which can occur during the medical appointment, causes white coat hypertension. Rate This Content: NEXT >> Updated: ...

  18. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... are consistently higher than 120/80 mmHg. Your child’s blood pressure numbers are outside average numbers for children of the same age, gender, and height . Once your health care provider ...

  19. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Explore High Blood Pressure What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics Atherosclerosis DASH Eating Plan Overweight and Obesity Smoking and Your Heart ...

  20. A comparison of non-invasive continuous finger blood pressure measurement (Finapres) with intra-arterial pressure during prolonged head-up tilt.

    Science.gov (United States)

    Petersen, M E; Williams, T R; Sutton, R

    1995-11-01

    Simultaneous intra-radial and non-invasive (Finapres, Ohmeda) blood pressures were compared during prolonged head-up tilt, in eight patients (mean age 49 years) with malignant vasovagal syncope. Twelve tilts were performed, of which eight resulted in vasovagal syncope. The mean bias (difference between Finapres and intra-arterial pressures) for systolic pressure was +0.7 mmHg (standard deviation 11.3 mmHg) and for diastolic pressure was +5.4 mmHg (standard deviation 7 mmHg). The within-tilt precision (standard deviation of the bias) of the non-invasive measurements varied between 2.9-12.4 mmHg (median 4.5 mmHg) for systolic comparisons, and 1.6-8.4 mmHg (median 4.4 mmHg) for diastolic comparisons. In all but one tilt highly significant positive increases in both systolic (median 7.1 mmHg) and diastolic bias (median 8.1 mmHg) occurred on tilt with respect to resting pre-tilt levels. Independent of the absolute level of agreement, the non-invasive measurements followed changes in intra-arterial pressure closely, with 89% of beat-to-beat changes in systolic pressure, and 95% of beat-to-beat changes in diastolic pressure followed to within +/- 2 mmHg. This study suggests that the Finapres is well suited for use during diagnostic tilt testing, demonstrating an acceptable within-tilt precision and closely following pressure changes during vasovagal syncope. PMID:8881861

  1. High Blood Pressure in Pregnancy

    Science.gov (United States)

    ... Talk to your doctor about any over-the-counter medications you are taking or are thinking about taking. Does Hypertension or Preeclampsia During Pregnancy Cause Long-Term Heart and Blood Vessel Problems? The effects of high blood pressure during pregnancy vary depending on the disorder and ...

  2. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Entire Site Health Topics News & Resources Intramural Research Public Health Topics Education & Awareness Resources Contact The Health Information ... Contact Us FAQs Home » Health Information for the Public » Health Topics » High Blood Pressure » Diagnosis of High Blood ...

  3. High blood pressure and eye disease

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/000999.htm High blood pressure and eye disease To use the sharing features ... are sent to the brain. Causes High blood pressure can damage blood vessels in the retina. The higher the blood ...

  4. How Is High Blood Pressure Treated?

    Science.gov (United States)

    ... from the NHLBI on Twitter. How Is High Blood Pressure Treated? Based on your diagnosis, health care providers ... the medicine suspected of causing your high blood pressure. If high blood pressure persists or is first diagnosed as primary ...

  5. Avoid the Consequences of High Blood Pressure

    Science.gov (United States)

    ... Resources Stroke More Avoid the Consequences of High Blood Pressure Infographic Updated:Jun 19,2014 View a downloadable version of this infographic High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  6. Questions and Answers about High Blood Pressure

    Science.gov (United States)

    ... Research Training & Career Development Grant programs for students, postdocs, and faculty Research at NIDDK Labs, faculty, and ... you have high blood pressure. How can I control or prevent high blood pressure? High blood pressure ...

  7. Beat-to-Beat Blood Pressure Monitor

    Science.gov (United States)

    Lee, Yong Jin

    2012-01-01

    This device provides non-invasive beat-to-beat blood pressure measurements and can be worn over the upper arm for prolonged durations. Phase and waveform analyses are performed on filtered proximal and distal photoplethysmographic (PPG) waveforms obtained from the brachial artery. The phase analysis is used primarily for the computation of the mean arterial pressure, while the waveform analysis is used primarily to obtain the pulse pressure. Real-time compliance estimate is used to refine both the mean arterial and pulse pressures to provide the beat-to-beat blood pressure measurement. This wearable physiological monitor can be used to continuously observe the beat-to-beat blood pressure (B3P). It can be used to monitor the effect of prolonged exposures to reduced gravitational environments and the effectiveness of various countermeasures. A number of researchers have used pulse wave velocity (PWV) of blood in the arteries to infer the beat-to-beat blood pressure. There has been documentation of relative success, but a device that is able to provide the required accuracy and repeatability has not yet been developed. It has been demonstrated that an accurate and repeatable blood pressure measurement can be obtained by measuring the phase change (e.g., phase velocity), amplitude change, and distortion of the PPG waveforms along the brachial artery. The approach is based on comparing the full PPG waveform between two points along the artery rather than measuring the time-of-flight. Minimizing the measurement separation and confining the measurement area to a single, well-defined artery allows the waveform to retain the general shape between the two measurement points. This allows signal processing of waveforms to determine the phase and amplitude changes.

  8. Health Behavior Change after Blood Pressure Feedback.

    Directory of Open Access Journals (Sweden)

    Jia Pu

    Full Text Available Better understanding is needed for antihypertensive medication initiation and lifestyle modification among younger populations with elevated blood pressure. This study aimed to assess health behavior change after receiving a report of elevated blood pressure among African Americans and Caucasians younger than 50 years old. We used the Coronary Artery Risk Development in Young Adults (CARDIA repository dataset. By examination year twenty, 424 out of 2,478 Caucasian and 2,637 African American participants had received feedback from the CARDIA study due to elevated blood pressure readings. Blood pressure was measured by trained CARDIA researchers at the participant's home and was repeatedly recorded at seven examinations over twenty years. A feedback/referral letter was sent to participants with an elevated blood pressure reading. On average, participants first had an elevated blood pressure reading at the age of 34. After receiving the feedback letter, 44% of the previously undiagnosed participants received a formal diagnosis. In addition, 23% initiated the use of antihypertensive medication if they had not received medication treatment before. Among the participants with at-risk lifestyle behaviors, 40% reduced alcohol consumption, 14% increased exercise level, 11% stopped smoking, and 8% reached normal weight. While none of the studied patient factors were associated with lifestyle modification, age had a positive impact on antihypertensive medication initiation (p<0.05. We found no evidence of differences in health behavior change between African American and Caucasian participants after receiving the feedback letter. This research is one of the first to study what followed after receiving a feedback letter about elevated blood pressure outside of healthcare settings. Although additional referral care and behavior interventions are needed to facilitate medication initiation and lifestyle modification, our observations suggest that providing

  9. Health Behavior Change after Blood Pressure Feedback.

    Science.gov (United States)

    Pu, Jia; Chewning, Betty A; Johnson, Heather M; Vanness, David J; Young, Henry N; Kreling, David H

    2015-01-01

    Better understanding is needed for antihypertensive medication initiation and lifestyle modification among younger populations with elevated blood pressure. This study aimed to assess health behavior change after receiving a report of elevated blood pressure among African Americans and Caucasians younger than 50 years old. We used the Coronary Artery Risk Development in Young Adults (CARDIA) repository dataset. By examination year twenty, 424 out of 2,478 Caucasian and 2,637 African American participants had received feedback from the CARDIA study due to elevated blood pressure readings. Blood pressure was measured by trained CARDIA researchers at the participant's home and was repeatedly recorded at seven examinations over twenty years. A feedback/referral letter was sent to participants with an elevated blood pressure reading. On average, participants first had an elevated blood pressure reading at the age of 34. After receiving the feedback letter, 44% of the previously undiagnosed participants received a formal diagnosis. In addition, 23% initiated the use of antihypertensive medication if they had not received medication treatment before. Among the participants with at-risk lifestyle behaviors, 40% reduced alcohol consumption, 14% increased exercise level, 11% stopped smoking, and 8% reached normal weight. While none of the studied patient factors were associated with lifestyle modification, age had a positive impact on antihypertensive medication initiation (pbehavior change between African American and Caucasian participants after receiving the feedback letter. This research is one of the first to study what followed after receiving a feedback letter about elevated blood pressure outside of healthcare settings. Although additional referral care and behavior interventions are needed to facilitate medication initiation and lifestyle modification, our observations suggest that providing blood pressure feedback may have promise as part of a multi-method approach

  10. Associations of sedentary behaviour, physical activity, blood pressure and anthropometric measures with cardiorespiratory fitness in children with cerebral palsy.

    Directory of Open Access Journals (Sweden)

    Jennifer M Ryan

    Full Text Available Children with cerebral palsy (CP have poor cardiorespiratory fitness in comparison to their peers with typical development, which may be due to low levels of physical activity. Poor cardiorespiratory fitness may contribute to increased cardiometabolic risk.The aim of this study was to determine the association between sedentary behaviour, physical activity and cardiorespiratory fitness in children with CP. An objective was to determine the association between cardiorespiratory fitness, anthropometric measures and blood pressure in children with CP.This study included 55 ambulatory children with CP [mean (SD age 11.3 (0.2 yr, range 6-17 yr; Gross Motor Function Classification System (GMFCS levels I and II]. Anthropometric measures (BMI, waist circumference and waist-height ratio and blood pressure were taken. Cardiorespiratory fitness was measured using a 10 m shuttle run test. Children were classified as low, middle and high fitness according to level achieved on the test using reference curves. Physical activity was measured by accelerometry over 7 days. In addition to total activity, time in sedentary behaviour and light, moderate, vigorous, and sustained moderate-to-vigorous activity (≥10 min bouts were calculated.Multiple regression analyses revealed that vigorous activity (β = 0.339, p<0.01, sustained moderate-to-vigorous activity (β = 0.250, p<0.05 and total activity (β = 0.238, p<0.05 were associated with level achieved on the shuttle run test after adjustment for age, sex and GMFCS level. Children with high fitness spent more time in vigorous activity than children with middle fitness (p<0.05. Shuttle run test level was negatively associated with BMI (r2 = -0.451, p<0.01, waist circumference (r2 = -0.560, p<0.001, waist-height ratio (r2 = -0.560, p<0.001 and systolic blood pressure (r2 = -0.306, p<0.05 after adjustment for age, sex and GMFCS level.Participation in physical activity, particularly at a vigorous intensity, is

  11. High Blood Pressure: Medicines to Help You

    Science.gov (United States)

    ... Consumers Consumer Information by Audience For Women High Blood Pressure--Medicines to Help You Share Tweet Linkedin Pin ... is your pressure when your heart relaxes ( diastolic pressure ). High Blood Pressure Medicines Use this guide to help you ...

  12. Smartphone Blood-Pressure App Often Wrong, Study Finds

    Science.gov (United States)

    ... nlm.nih.gov/medlineplus/news/fullstory_157555.html Smartphone Blood-Pressure App Often Wrong, Study Finds Measurements ... HealthDay News) -- A popular app that uses your smartphone to check your blood pressure is inaccurate, missing ...

  13. Reproducibility of non-invasive measurement and of short-term variability of blood pressure and heart rate in healthy volunteers.

    OpenAIRE

    Dimier-David, L.; Billon, N; Costagliola, D.; Jaillon, P; Funck-Brentano, C

    1994-01-01

    1. Spectral analyses of blood pressure and heart rate oscillations are increasingly used to assess the influences of diseases and drugs on the autonomic nervous system. Such influences can only be interpreted in view of the spontaneous variability of these oscillations. We therefore studied the reproducibility of power spectral analyses of blood pressure and heart rate fluctuations measured by a non-invasive finger plethysmographic method in 24 healthy volunteers. 2. Intra-observer reproducib...

  14. Noninvasive tracking of systolic arterial blood pressure using pulse transit time measured with ECG and carotid doppler signals with intermittent calibration

    OpenAIRE

    Fujita, Yoshihisa

    2016-01-01

    We have developed a non-invasive blood pressure measurement system using pulse transit time (PTT) from the heart to the common carotid artery, measured by using an electrocardiogram (ECG) R-wave and carotid arterial Doppler signals at the anterior neck. In this study, we examined the validity of our system by comparing PTT derived systolic blood pressure (Dopp_SBP) with invasive radial systolic arterial pressure (Inv_SBP) with calibration every 15 min in the ICU setting.Methods: 17 patients u...

  15. Validation of the integration of technology that measures additional “vascular” indices into an ambulatory blood pressure monitoring system

    Directory of Open Access Journals (Sweden)

    Kotovskaya YV

    2014-05-01

    Full Text Available Yulia V Kotovskaya,1 Zhanna D Kobalava,1 Artemy V Orlov21Propedeutics Department, Peoples’ Friendship University of Russia, 2Competitive System Analysis Department (No 65, National Research Nuclear University MEPhI, Moscow, RussiaBackground: The objective of this study was to validate the novel integration of oscillometric (Vasotens® technology into a BPLab® ambulatory blood pressure (BP monitoring system to measure central BP, the aortic augmentation index, and pulse wave velocity (PWV compared with the recommended and widely accepted tonometric method.Methods: The ARTERY Society guidelines for comparison of PWV measurement techniques were used as the basis for recruitment of 99 individuals (mean age 44±19 years, 52 males. The standard for comparison was the conventional “classic” SphygmoCor device.Results: Accordance of the two methods was satisfactory (r=0.98, mean difference of 2.9±3.5 mmHg for central systolic BP; r=0.98, mean difference of −1.1±2.3 mmHg for central diastolic BP; r=0.83, mean difference of −2.6%±13% for aortic augmentation index; r=0.85, mean difference of 0.69±1.4 for PWV.Conclusion: The performance of Vasotens algorithms using an oscillometric ambulatory BP monitoring system is feasible for accurate diagnosis, risk assessment, and evaluation of the effects of antihypertensive drugs.Keywords: validation study, ambulatory, 24-hour, monitoring, arterial stiffness, pulse wave velocity, augmentation index, central blood pressure

  16. Reference data for distal blood pressure in healthy elderly and middle-aged individuals measured with the strain gauge technique. Part I: Resting distal blood pressure

    DEFF Research Database (Denmark)

    Arveschoug, Anne Kirstine; Vammen, Birthe; Yoshinaka, Emmy;

    2008-01-01

    . Material and methods. Group I comprised 31 healthy persons aged between 61 and 87 years and group II 14 healthy middle-aged hospital staff members aged between 45 and 58 years. Strict rules of inclusion were followed. Results. For group I, significantly greater gradients (DBPtoe - systolic arm blood...

  17. DASH diet to lower high blood pressure

    Science.gov (United States)

    ... patientinstructions/000770.htm DASH diet to lower high blood pressure To use the sharing features on this page, ... Hypertension. The DASH diet can help lower high blood pressure and cholesterol and other fats in your blood. ...

  18. High Blood Pressure: Keep the Beat Recipes

    Science.gov (United States)

    ... this page please turn Javascript on. Feature: High Blood Pressure Keep the Beat Recipes Past Issues / Fall 2011 ... National Heart, Lung, and Blood Institute To Improve Blood Pressure, Try the DASH Diet If you're one ...

  19. Possibility of non-invasive blood pressure estimation by measurements of force and arteries diameter

    OpenAIRE

    Veye, Florent; Mestre, Sandrine; Perez-Martin, Antonia; Triboulet, Jean

    2014-01-01

    International audience Ultrasound examination is the first line procedure for the diagnosis and follow-up of cardiovascular diseases. Instrumenting an ultrasound probe with a force sensor may improve the non-invasive measurement of arterial biomechanical parameters (diameter, pulsatility, intima-media thickness and flow-dependent dilation) by measuring and controlling the force exerted by the sonographer. We present here the results obtained with this approach coupled with image processing...

  20. Vital Signs - High Blood Pressure

    Centers for Disease Control (CDC) Podcasts

    2012-10-02

    In the U.S., nearly one third of the adult population have high blood pressure, the leading risk factor for heart disease and stroke - two of the nation's leading causes of death.  Created: 10/2/2012 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP).   Date Released: 10/17/2012.

  1. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Explore High Blood Pressure What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics Atherosclerosis DASH Eating Plan Overweight and Obesity Smoking and Your Heart Stroke Send a link ...

  2. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Technology Transfer Clinical Trials What Are Clinical Trials? Children & Clinical Studies NHLBI Trials Clinical Trial Websites News & ... are consistently higher than 120/80 mmHg. Your child’s blood pressure numbers are outside average numbers for ...

  3. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Health Topics Education & Awareness Resources Contact The Health Information Center Health Professionals Systematic Evidence Reviews & Clinical Practice ... Legislative Advisory Committees Contact Us FAQs Home » Health Information for the Public » Health Topics » High Blood Pressure » ...

  4. Diagnosis of High Blood Pressure

    Medline Plus

    Full Text Available ... Related Topics Atherosclerosis DASH Eating Plan Overweight and Obesity Smoking and Your Heart Stroke Send a link ... are consistently higher than 120/80 mmHg. Your child’s blood pressure numbers are outside average numbers for ...

  5. A novel photoplethysmography technique to derive normalized arterial stiffness as a blood pressure independent measure in the finger vascular bed

    International Nuclear Information System (INIS)

    Stiffening of the small artery may be the earliest sign of arteriosclerosis. However, there is no adequate method for directly assessing small arterial stiffness. In this study, the finger arterial elasticity index (FEI) was defined as the parameter n which denotes the curvilinearity of an exponential model of pressure (P)–volume (Va) relationship (Va = a − b exp (−nP)). For the original estimation, the FEI was calculated from a compliance index from the finger photoplethysmogram whilst occluding the finger. A simple estimation of the FEI was devised by utilizing normalized pulse volume instead of the compliance index. Both estimations yielded close agreement with the exponential model in healthy young participants (study 1: n = 19). Since the FEI was dependent on finger mean blood pressure, normalized finger arterial stiffness index (FSI) was defined as standardized residual from their relationship: mean and standard deviation (SD) of the FSI were 50 ± 10 (study 2: n = 174). The mean coefficient of variation of the FSI for four measurements was 5.72% (study 3: n = 6). The mean and SD of the FSI in seven arteriosclerotic patients were 100.0 ± 13.5. In conclusion, the FEI and FSI by simple estimation are valid and useful for arteriosclerosis research

  6. Accuracy Evaluation of Non-invasive Blood Pressure Monitor in Blood Pressure Measurement of Patients with Atrial Fibrillation%无创血压监护仪在心房纤颤病人血压测量中的准确性评价

    Institute of Scientific and Technical Information of China (English)

    胡文志; 周海波

    2014-01-01

    目的:探讨无创血压监护仪在心房纤颤病人血压测量中的准确性。方法对60例心房纤颤病人分别采用无创血压监护仪和汞柱台式血压计进行血压监测,对比其测量结果。结果无创血压监护仪和汞柱台式血压计血压测量结果比较,收缩压无显著差异(P>0.05),而舒张压有显著差异(P<0.05)。结论无创血压监护仪在心房纤颤病人血压测量中的准确性较差,值得临床注意。%Objective To investigate the accuracy of non-invasive blood pressure monitor in blood pressure measurement of patients with atrial fibrillation. Methods The blood pressure of 60 patients with atrial fibrillation was measured by using non-invasive blood pressure monitor and mercury sphygmomanometer, respectively. Then the measuring results of blood pressure of non-invasive blood pressure monitor were compared with those of mercury sphygmomanometer. Results There was no signiifcant difference between the measuring results of blood pressure of non-invasive blood pressure and those of mercury sphygmomanometer on systolic pressure (P>0.05) while there were signiifcant differences between the measuring results of blood pressure of non-invasive blood pressure and those of mercury sphygmomanometer on diastolic pressure (P<0.05). Conclusion It is inaccurate to measure the blood pressure of patients with atrial ifbrillation by using non-invasive blood pressure monitor, which should be paid attention to in clinic.

  7. Prediction of effectiveness of shunting in patients with normal pressure hydrocephalus by cerebral blood flow measurement and computed tomography cisternography

    International Nuclear Information System (INIS)

    Measurement of cerebral blood flow (CBF) and computed tomography (CT) cisternography were performed in 37 patients with a tentative diagnosis of normal pressure hydrocephalus (NPH) to predict their surgical outcome. The mean CBF of the whole brain was measured quantitatively by single photon emission computed tomography with technetium-99m-hexamethylpropylene amine oxime before surgery. The results of CT cisternography were classified into four patients: type I, no ventricular stasis at 24 hours; type II, no ventricular stasis with delayed clearance of cerebral blush; type III, persistent ventricular stasis with prominent cerebral blush; type IV, persistent ventricular stasis with diminished cerebral blush and/or asymmetrical filling of the sylvian fissures. The mean CBF was significantly lower than that of age-matched controls (p<0.005). Patients with a favorable outcome had a significantly higher mean CBF than patients with an unfavorable outcome (p<0.005). Patients with the type I pattern did not respond to shunting. Some patients with type II and III patterns responded to shunting but improvement was unsatisfactory. Patients with type IV pattern responded well to shunting, and those with a mean CBF of 35 ml/100 g/min or over achieved a favorable outcome. The combination of CBF measurement and CT cisternography can improve the prediction of surgical outcome in patients with suspected NPH. (author)

  8. Tolerability of the Oscar 2 ambulatory blood pressure monitor among research participants: a cross-sectional repeated measures study

    Directory of Open Access Journals (Sweden)

    Hinderliter Alan L

    2011-04-01

    Full Text Available Abstract Background Ambulatory blood pressure monitoring (ABPM is increasingly used to measure blood pressure (BP in research studies. We examined ease of use, comfort, degree of disturbance, reported adverse effects, factors associated with poor tolerability, and association of poor tolerability with data acquisition of 24-hour ABPM using the Oscar 2 monitor in the research setting. Methods Sixty adults participating in a research study of people with a history of borderline clinic BP reported on their experience with ABPM on two occasions one week apart. Poor tolerability was operationalized as an overall score at or above the 75th percentile using responses to questions adapted from a previously developed questionnaire. In addition to descriptive statistics (means for responses to Likert-scaled "0 to 10" questions and proportions for Yes/No questions, we examined reproducibility of poor tolerability as well as associations with poor tolerability and whether poor tolerability was associated with removal of the monitor or inadequate number of BP measurements. Results The mean ambulatory BP of participants by an initial ABPM session was 148/87 mm Hg. After wearing the monitor the first time, the degree to which the monitor was felt to be cumbersome ranged from a mean of 3.0 to 3.8, depending on whether at work, home, driving, or other times. The most bother was interference with normal sleeping pattern (mean 4.2. Wearers found the monitor straightforward to use (mean 7.5. Nearly 67% reported that the monitor woke them after falling asleep, and 8.6% removed it at some point during the night. Reported adverse effects included pain (32%, skin irritation (37%, and bruising (7%. Those categorized as having poor tolerability (kappa = 0.5 between sessions, p = 0.0003 were more likely to report being in fair/poor health (75% vs 22%, p = 0.01 and have elevated 24-hour BP average (systolic: 28% vs 17%, p = 0.56; diastolic: 30% vs 17%, p = 0.37. They were

  9. Blood pressure in head‐injured patients

    Science.gov (United States)

    Mitchell, Patrick; Gregson, Barbara A; Piper, Ian; Citerio, Giuseppe; Mendelow, A David; Chambers, Iain R

    2007-01-01

    Objective To determine the statistical characteristics of blood pressure (BP) readings from a large number of head‐injured patients. Methods The BrainIT group has collected high time‐resolution physiological and clinical data from head‐injured patients who require intracranial pressure (ICP) monitoring. The statistical features of this dataset of BP measurements with time resolution of 1 min from 200 patients is examined. The distributions of BP measurements and their relationship with simultaneous ICP measurements are described. Results The distributions of mean, systolic and diastolic readings are close to normal with modest skewing towards higher values. There is a trend towards an increase in blood pressure with advancing age, but this is not significant. Simultaneous blood pressure and ICP values suggest a triphasic relationship with a BP rising at 0.28 mm Hg/mm Hg of ICP, for ICP up to 32 mm Hg, and 0.9 mm Hg/mm Hg of ICP for ICP from 33 to 55 mm Hg, and falling sharply with rising ICP for ICP >55 mm Hg. Conclusions Patients with head injury appear to have a near normal distribution of blood pressure readings that are skewed towards higher values. The relationship between BP and ICP may be triphasic. PMID:17138594

  10. Blood Pressure Patterns May Predict Stroke Risk

    Science.gov (United States)

    ... pressure from normal systolic blood pressure (120 mm Hg) in middle age to high (160 mm Hg). Normal blood pressure in middle age but a steep rise to very high (200 mm Hg). Moderately high blood pressure (140 mm Hg) in ...

  11. Blood Pressure Percentiles for School Children

    Directory of Open Access Journals (Sweden)

    İsmail Özanli

    2016-06-01

    Full Text Available Objective: The prevalence of hypertension in childhood and adolescence is gradually increasing. We aimed to in­vestigate the blood pressure (BP values of children aged 7-18 years. Methods: This study was conducted in a total of 3375 (1777 females, 1598 males children from 27 schools. Blood pressures of children were measured using sphyg­momanometer appropriate to arm circumference. Results: A positive relationship was found between sys­tolic blood pressure (SBP and diastolic blood pressure (DBP and the body weight, height, age and body mass index (BMI in male and female children. SBP was high­er in males than females after the age of 13. DBP was higher in males than the females after the age of 14. The mean annual increase of SBP was 2.06 mmHg in males and 1.54 mmHg in females. The mean annual increase of DBP was 1.52 mmHg in males and 1.38 mmHg in fe­males. Conclusion: In this study, we identified the threshold val­ues for blood pressure in children between the age of 7 and 18 years in Erzurum province. It is necessary to com­bine and evaluate data obtained from various regions for the identification of BP percentiles according to the age, gender and height percentiles of Turkish children.

  12. Reference data for distal blood pressure in healthy elderly and middle-aged individuals measured with the strain gauge technique. Part II: Distal blood pressure after exercise

    DEFF Research Database (Denmark)

    Arveschoug, Anne Kirstine; Vammen, Birthe; Yoshinaka, Emmy;

    2008-01-01

    on age. Material and methods. DBP after exercise was measured using the strain-gauge technique on individuals in two groups: group I comprising 25 healthy persons aged between 61 and 82 years, and group II 14 healthy persons aged between 45 and 58 years. Strict rules of inclusion were followed...

  13. Estimated aortic blood pressure based on radial artery tonometry underestimates directly measured aortic blood pressure in patients with advancing chronic kidney disease staging and increasing arterial stiffness

    DEFF Research Database (Denmark)

    Carlsen, Rasmus K; Peters, Christian D; Khatir, Dinah S;

    2016-01-01

    /min/1.73 m(2)) and 41 controls without renal disease undergoing scheduled coronary angiography. BP in the ascending aorta was measured through the angiography catheter and simultaneously estimated using radial tonometry. The mean difference between estimated central and aortic SBP was -13.2 (95...

  14. The impact of arm position and pulse pressure on the validation of a wrist-cuff blood pressure measurement device in a high risk population

    Directory of Open Access Journals (Sweden)

    Ali Reza Khoshdel

    2010-03-01

    Full Text Available Ali Reza Khoshdel1,2, Shane Carney2, Alastair Gillies21Faculty of Medicine, Aja University of Medical Science, Tehran, Iran; 2John Hunter Hospital, Faculty of Health, The University of Newcastle, Newcastle, NS W, AustraliaAbstract: Despite the increasing popularity of blood pressure (BP wrist monitors for self-BP measurement at home, device validation and the effect of arm position remains an issue. This study focused on the validation of the Omron HEM-609 wrist BP device, including an evaluation of the impact of arm position and pulse pressure on BP measurement validation. Fifty patients at high risk for cardiovascular disease were selected (age 65 ± 10 years. Each patient had two measurements with a mercury sphygmomanometer and three measurements with the wrist BP device (wrist at the heart level while the horizontal arm supported [HORIZONTAL], hand supported on the opposite shoulder [SHOULDER], and elbow placed on a desk [DESK], in random order. The achieved systolic BP (SBP and diastolic BP (DBP wrist-cuff readings were compared to the mercury device and the frequencies of the readings within 5, 10, and 15 mmHg of the gold standard were computed and compared with the British Hypertension Society (BHS and Association for the Advancement of Medical Instrumentation (AAMI protocols. The results showed while SBP readings with HORIZONTAL and SHOULDER positions were significantly different from the mercury device (mean difference = 7.1 and 13.3 mmHg, respectively; P < 0.05, the DESK position created the closest reading to mercury (mean difference = 3.8, P > 0.1. Approximately 71% of SBP readings with the DESK position were within ±10 mmHg, whereas it was 62.5% and 34% for HORIZONTAL and SHOULDER positions, respectively. Wrist DBP attained category D with BHS criteria with all three arm positions. Bland–Altman plots illustrated that the wrist monitor systematically underestimated SBP and DBP values. However a reading adjustment of 5 and 10 mm

  15. From blood pressure to physical disability: the role of cognition.

    Science.gov (United States)

    Elias, Merrill F; Dore, Gregory A; Davey, Adam; Robbins, Michael A; Elias, Penelope K

    2010-06-01

    We examined the hypothesis that lowered cognitive performance plays a role in the relation between elevated blood pressure and physical disability in performing basic physical tasks. A community-based sample (N=1025) free from stroke and dementia (mean age: 61.1 years; SD: 13.0 years; 59.8% women) was used. Using path analysis, systolic and diastolic blood pressures (predictor variable) measured over multiple longitudinal examinations were averaged and related to multiple measures of cognition (intermediate variable) and physical ability (PA; outcome variable) measured at wave 6 of the Maine-Syracuse Study. PA was indexed by time required to execute standing, walking, and turning tests. A best-fit path model including blood pressure and multiple demographic and cardiovascular disease covariates was used. Paths from systolic blood pressure to global performance, verbal memory, and abstract reasoning (Similarities test) were significant (Pspatial organization/memory, verbal memory, working memory, and abstract reasoning. Regardless of the blood pressure predictor, lower cognitive performance (intermediate variable) was related to lower PA (outcome) in the path from blood pressure to PA. The direct path from blood pressure to PA was significant only for systolic blood pressure. Cognitive performance mediates between blood pressure and PA. As compared with systolic blood pressure, more domains of cognitive functioning intervene between diastolic blood pressure and PA. PMID:20404216

  16. Association of maternal blood pressure in pregnancy with blood pressure of their offspring through adolescence.

    Science.gov (United States)

    Royal-Thomas, Tamika; McGee, Daniel; Sinha, Debajyoti; Osmond, Clive; Forrester, Terrence

    2015-11-01

    This article looks at the association of maternal blood pressure with the blood pressure of the offspring from birth to childhood. The Barker hypothesis states that maternal and "in utero" attributes during pregnancy affect a child's cardiovascular health throughout life. We present an analysis of a unique dataset that consists of three distinct developmental processes: maternal cardiovascular health during pregnancy; fetal development; and child's cardiovascular health from birth to 14 years. This study explored whether a mother's blood pressure reading in pregnancy predicts fetal development and determines if this in turn is related to the future cardiovascular health of the child. This article uses data that have been collected prospectively from a Jamaican cohort which involves the following three developmental processes: (1) maternal cardiovascular health during pregnancy which is the blood pressure and anthropometric measurements at seven time-points on the mother during pregnancy; (2) fetal development which consists of ultrasound measurements of the fetus taken at six time-points during pregnancy; and (3) child's cardiovascular health which consists of the child's blood pressure measurements at 24 time-points from birth to 14 years. The inter-relationship of these three processes was examined using linear mixed effects models. Our analyses indicated that attributes later in childhood development, such as child's weight, child's baseline systolic blood pressure (SBP), age and sex, predict the future cardiovascular health of children. The results also indicated that maternal attributes in pregnancy, such as mother's baseline SBP and SBP change, predicted significantly child's SBP over time. PMID:25178900

  17. Effectiveness of in-office blood pressure measurement by eye care practitioners in early detection and management of hypertension

    Institute of Scientific and Technical Information of China (English)

    Saud; A.Al; Anazi; Uchechukwu; L.Osuagwu; Turki; M.Al; Mubrad; Hany; K.Ahmed; Kelechi; C.Ogbuehi

    2015-01-01

    AIM: To investigate the number of hypertensive patients, the optometrist is able to identify by routinely taking blood pressure(BP) measurements for patients in "at-risk" groups, and to sample patients’ opinions regarding in-office BP measurement. Many of the optometrists in Saudi Arabia practice in optical stores.These stores are wide spread, easily accessible and seldom need appointments. The expanding role of the optometrist as a primary health care provider(PHCP) and the increasing global prevalence of hypertension,highlight the need for an integrated approach towards detecting and monitoring hypertension.METHODS: Automated BP measurements were made twice(during the same session) at five selected optometry practices using a validated BP monitor(Omron M6) to assess the number of patients with high BP(HBP)- in at-risk groups-visiting the eye clinic routinely. Prior to data collection, practitioners underwent a two-day training workshop by a cardiologist on hypertension and how to obtain accurate BP readings. A protocol for BP measurement was distributed and retained in all participating clinics. The general,,.,attitude towards cardiovascular health of 480 patients aged 37.2(±12.4)y and their opinion towards in-office BP measurement was assessed using a self-administered questionnaire.RESULTS: A response rate of 83.6% was obtained for the survey. Ninety-three of the 443 patients(21.0%)tested for BP in this study had HBP. Of these,(62subjects) 67.7% were unaware of their HBP status. Thirty of the 105 subjects(28.6%) who had previously been diagnosed with HBP, still had HBP at the time of this study, and only 22(73.3%) of these patients were on medication. Also, only 25% of the diagnosed hypertensive patients owned a BP monitor.CONCLUSION: Taking BP measurements in optometry practices, we were able to identify one previously undiagnosed patient with HBP for every 8 adults tested.We also identified 30 of 105 previously diagnosed patients whose BP was poorly

  18. Preeclampsia and High Blood Pressure During Pregnancy

    Science.gov (United States)

    ... AQ FREQUENTLY ASKED QUESTIONS FAQ034 PREGNANCY Preeclampsia and High Blood Pressure During Pregnancy • What is high blood pressure? • What is chronic hypertension? • What is gestational hypertension? • ...

  19. High Blood Pressure: Unique to Older Adults

    Science.gov (United States)

    ... e-newsletter! Aging & Health A to Z High Blood Pressure Hypertension Unique to Older Adults This section provides ... care and improve or maintain quality of life. Blood Pressure Targets are Different for Very Old Adults High ...

  20. Blood Pressure Patterns May Predict Stroke Risk

    Science.gov (United States)

    ... blood pressure reading) of more than 6,700 Dutch adults. Participants were ages 55 to 106 and ... stroke or death from other blood pressure-related diseases up to age 80, the study found. Moderately ...

  1. Increasing blood pressure and its associated factors in Canadian children and adolescents from the Canadian Health Measures Survey

    OpenAIRE

    Shi Yipu; de Groh Margaret; Morrison Howard

    2012-01-01

    Abstract Background Canada is facing a childhood obesity epidemic. Elevated blood pressure (BP) is a major complication of obesity. Reports on the impact of excess adiposity on BP in children and adolescents have varied significantly across studies. We evaluated the independent effects of obesity, physical activity, family history of hypertension, and socioeconomic status on BP in a nationally representative sample of children and adolescents. Methods We analysed cross-sectional data for 1850...

  2. Impact of High-Normal Blood Pressure Measured in Emergency Room on Adverse Cardiac Events in Acute Myocardial Infarction

    OpenAIRE

    Yoon, Nam Sik; Jeong, Myung Ho; Ahn, Youngkeun; Kim, Jong Hyun; Chae, Shung Chull; Kim, Young Jo; Hur, Seung Ho; Seong, In Whan; Hong, Taek Jong; Choi, Donghoon; Cho, Myeong Chan; Kim, Chong Jin; Seung, Ki Bae; Chung, Wook Sung; Jang, Yang Soo

    2012-01-01

    Background and Objectives Prehypertension according to JNC7 is common and is associated with increased vascular mortality. The importance of management in high-normal blood pressure (BP) is underemphasized. Subjects and Methods We analyzed major adverse cardiac events (MACEs) in the Korea Acute Myocardial Infarction Registry in normal BP (group I) and high-normal BP (group II) patients. Results Among 14871 patients, 159 (61±12.3 years, 122 males) satisfied the study indication. Six-month and ...

  3. HIGH BLOOD PRESSURE: DOES THIS CONCERN ME?

    CERN Multimedia

    2007-01-01

    To find out, the Medical Service's nurses are organising A HIGH BLOOD PRESSURE SCREENING AND PREVENTION CAMPAIGN from Monday, 26th to Thursday, 29th March 2007 at the Infirmary - Building 57 - ground floor A blood pressure test, advice, information and, if necessary, referral for specialist medical treatment will be offered to any person working on the CERN site. High blood pressure is a silent threat to health. So come and get your blood pressure checked.

  4. HIGH BLOOD PRESSURE: DOES THIS CONCERN ME?

    CERN Multimedia

    2007-01-01

    To find out, the Medical Service's nurses are organising A HIGH BLOOD PRESSURE SCREENING AND PREVENTION CAMPAIGN from Monday, 26th to Thursday, 29th March 2007 at the Infirmary - Building 57 - ground floor A blood pressure test, advice, information and, if necessary, referral for specialist medical treatment will be offered to any person working on the CERN site. High blood pressure is a stealth threat to health. So come and get your blood pressure checked.

  5. Automated postoperative blood pressure control

    Institute of Scientific and Technical Information of China (English)

    Hang ZHENG; Kuanyi ZHU

    2005-01-01

    It is very important to maintain the level of mean arterial pressure (MAP).The MAP control is applied in many clinical situations,including limiting bleeding during cardiac surgery and promoting healing for patient's post-surgery.This paper presents a fuzzy controller-based multiple-model adaptive control system for postoperative blood pressure management.Multiple-model adaptive control (MMAC) algorithm is used to identify the patient model,and it is a feasible system identification method even in the presence of large noise.Fuzzy control (FC) method is used to design controller bank.Each fuzzy controller in the controller bank is in fact a nonlinear proportional-integral (PI) controller,whose proportional gain and integral gain are adjusted continuously according to error and rate of change of error of the plant output,resulting in better dynamic and stable control performance than the regular PI controller,especially when a nonlinear process is involved.For demonstration,a nonlinear,pulsatile-flow patient model is used for simulation,and the results show that the adaptive control system can effectively handle the changes in patient's dynamics and provide satisfactory performance in regulation of blood pressure of hypertension patients.

  6. Increasing blood pressure and its associated factors in Canadian children and adolescents from the Canadian Health Measures Survey

    Directory of Open Access Journals (Sweden)

    Shi Yipu

    2012-07-01

    Full Text Available Abstract Background Canada is facing a childhood obesity epidemic. Elevated blood pressure (BP is a major complication of obesity. Reports on the impact of excess adiposity on BP in children and adolescents have varied significantly across studies. We evaluated the independent effects of obesity, physical activity, family history of hypertension, and socioeconomic status on BP in a nationally representative sample of children and adolescents. Methods We analysed cross-sectional data for 1850 children aged 6 to 17 years who participated in the Canadian Health Measures Survey, Cycle 1, 2007–2009. Systolic BP (SBP and diastolic BP (DBP were age-, sex-, and height-adjusted to z-scores (SBPZ and DBPZ. Body mass index (BMI z-scores were calculated based on World Health Organization growth standards. Multivariate linear regression was used to evaluate the independent effects of relevant variables on SBPZ and DBPZ. Results For most age/sex groups, obesity was positively associated with SBP. Being obese was associated with higher DBP in adolescent boys only. The BP effect of obesity showed earlier in young girls than boys. Obese adolescents were estimated to have an average 7.6 mmHg higher SBP than normal weight adolescents. BMI had the strongest effect on BP among obese children and adolescents. Moderately active adolescent boys had higher SBP (3.9 mmHg and DBP (4.9 mmHg than physically active boys. Family history of hypertension showed effects on SBP and DBP in younger girls and adolescent boys. Both family income and parent education demonstrated independent associations with BP in young children. Conclusions Our findings demonstrate the early impact of excess adiposity, insufficient physical activity, family history of hypertension, and socioeconomic inequalities on BP. Early interventions to reduce childhood obesity can, among other things, reduce exposure to prolonged BP elevation and the future risk of cardiovascular disease.

  7. Auscultatory Blood Pressure Measurement—Effect of Pressure on the Head of the Stethoscope

    OpenAIRE

    Londe, Sol; Klitzner, Thomas S.

    1984-01-01

    Excessive pressure on the stethoscope head in auscultatory blood pressure measurement does not affect systolic blood pressure value but it does erroneously lower diastolic readings and frequently causes the sounds to persist to zero. Consequently, the lightest possible pressure should be placed on the stethoscope head.

  8. Dysglycemia induces abnormal circadian blood pressure variability

    Directory of Open Access Journals (Sweden)

    Kumarasamy Sivarajan

    2011-11-01

    Full Text Available Abstract Background Prediabetes (PreDM in asymptomatic adults is associated with abnormal circadian blood pressure variability (abnormal CBPV. Hypothesis Systemic inflammation and glycemia influence circadian blood pressure variability. Methods Dahl salt-sensitive (S rats (n = 19 after weaning were fed either an American (AD or a standard (SD diet. The AD (high-glycemic-index, high-fat simulated customary human diet, provided daily overabundant calories which over time lead to body weight gain. The SD (low-glycemic-index, low-fat mirrored desirable balanced human diet for maintaining body weight. Body weight and serum concentrations for fasting glucose (FG, adipokines (leptin and adiponectin, and proinflammatory cytokines [monocyte chemoattractant protein-1 (MCP-1 and tumor necrosis factor-α (TNF-α] were measured. Rats were surgically implanted with C40 transmitters and blood pressure (BP-both systolic; SBP and diastolic; DBP and heart rate (HR were recorded by telemetry every 5 minutes during both sleep (day and active (night periods. Pulse pressure (PP was calculated (PP = SBP-DBP. Results [mean(SEM]: The AD fed group displayed significant increase in body weight (after 90 days; p Conclusion These data validate our stated hypothesis that systemic inflammation and glycemia influence circadian blood pressure variability. This study, for the first time, demonstrates a cause and effect relationship between caloric excess, enhanced systemic inflammation, dysglycemia, loss of blood pressure control and abnormal CBPV. Our results provide the fundamental basis for examining the relationship between dysglycemia and perturbation of the underlying mechanisms (adipose tissue dysfunction induced local and systemic inflammation, insulin resistance and alteration of adipose tissue precursors for the renin-aldosterone-angiotensin system which generate abnormal CBPV.

  9. Murata - A Pressure Sensor Based Blood Pressure : Preliminary Reliability Study

    OpenAIRE

    Nummelin, Elina

    2015-01-01

    The purpose of the study was to determine the reliability of a blood pressure sensor developed by Murata as a blood pressure monitoring tool compared to an automatic blood pressure monitor, Omron M6. Blood pressure is one of the principal vital signs and is utilized for monitoring both short-term and long-term health of the cardiovascular system and thereby the health of the patient. Therefore there is a need for a non-invasive blood pressure monitor for accurate, continuous and comfortab...

  10. Blood pressure modifies retinal susceptibility to intraocular pressure elevation.

    Directory of Open Access Journals (Sweden)

    Zheng He

    Full Text Available Primary open angle glaucoma affects more than 67 million people. Elevated intraocular pressure (IOP is a risk factor for glaucoma and may reduce nutrient availability by decreasing ocular perfusion pressure (OPP. An interaction between arterial blood pressure and IOP determines OPP; but the exact contribution that these factors have for retinal function is not fully understood. Here we sought to determine how acute modifications of arterial pressure will affect the susceptibility of neuronal function and blood flow to IOP challenge. Anaesthetized (ketamine:xylazine Long-Evan rats with low (∼60 mmHg, sodium nitroprusside infusion, moderate (∼100 mmHg, saline, or high levels (∼160 mmHg, angiotensin II of mean arterial pressure (MAP, n = 5-10 per group were subjected to IOP challenge (10-120 mmHg, 5 mmHg steps every 3 minutes. Electroretinograms were measured at each IOP step to assess bipolar cell (b-wave and inner retinal function (scotopic threshold response or STR. Ocular blood flow was measured using laser-Doppler flowmetry in groups with similar MAP level and the same IOP challenge protocol. Both b-wave and STR amplitudes decreased with IOP elevation. Retinal function was less susceptible to IOP challenge when MAP was high, whereas the converse was true for low MAP. Consistent with the effects on retinal function, higher IOP was needed to attenuated ocular blood flow in animals with higher MAP. The susceptibility of retinal function to IOP challenge can be ameliorated by acute high BP, and exacerbated by low BP. This is partially mediated by modifications in ocular blood flow.

  11. Interchangeability of Electrocardiography and Blood Pressure Measurement for Determining Heart Rate and Heart Rate Variability in Free-Moving Domestic Pigs in Various Behavioral Contexts

    OpenAIRE

    Krause, Annika; Tuchscherer, Armin; Puppe, Birger; Langbein, Jan

    2015-01-01

    This study assessed the interchangeability between heart rate (HR) and heart rate variability (HRV) measures derived from a series of interbeat intervals (IBIs) recorded via electrocardiogram (ECG) and intra-arterial blood pressure (BP) in various behavioral contexts. Five minutes of simultaneously recorded IBIs from ECG and BP signals in 11 female domestic pigs during resting, feeding, and active behavior were analyzed. Comparisons were made for measures of HR, the standard deviation of IBIs...

  12. A survey of blood pressure in Lebanese children and adolescence

    Directory of Open Access Journals (Sweden)

    Bassem Abou Merhi

    2011-01-01

    Full Text Available Background: Blood pressure varies between populations due to ethnic and environmental factors. Therefore, normal blood pressure values should be determined for different populations. Aims: The aim of this survey was to produce blood pressure nomograms for Lebanese children in order to establish distribution curves of blood pressure by age and sex. Subjects and Methods: We conducted a survey of blood pressure in 5710 Lebanese schoolchildren aged 5 to 15 years (2918 boys and 2792 girls, and studied the distribution of systolic and diastolic blood pressure in these children and adolescents. Blood pressure was measured with a mercury sphygmomanometer using a standardized technique. Results: Both systolic and diastolic blood pressure had a positive correlation with weight, height, age, and body mass index (r= 0.648, 0.643, 0.582, and 0.44, respectively (P < .001. There was no significant difference in the systolic and diastolic blood pressure in boys compared to girls of corresponding ages. However, the average annual increase in systolic blood pressure was 2.86 mm Hg in boys and 2.63 mm Hg in girls, whereas the annual increase in diastolic blood pressure was 1.72 mm Hg in boys and 1.48 mm Hg in girls. The prevalence of high and high-normal blood pressure at the upper limit of normal (between the 90th and 95th percentile, at risk of future hypertension if not managed adequately, was 10.5% in boys and 6.9% in girls, with similar distributions among the two sexes. Conclusions: We present the first age-specific reference values for blood pressure of Lebanese children aged 5 to 15 years based on a good representative sample. The use of these reference values should help pediatricians identify children with normal, high-normal and high blood pressure.

  13. A survey of blood pressure in Lebanese children and adolescence

    Directory of Open Access Journals (Sweden)

    Bassem Abou Merhi

    2011-01-01

    Full Text Available Background: Blood pressure varies between populations due to ethnic and environmental factors. Therefore, normal blood pressure values should be determined for different populations. Aims : The aim of this survey was to produce blood pressure nomograms for Lebanese children in order to establish distribution curves of blood pressure by age and sex. Subjects and Methods: We conducted a survey of blood pressure in 5710 Lebanese schoolchildren aged 5 to 15 years (2918 boys and 2792 girls, and studied the distribution of systolic and diastolic blood pressure in these children and adolescents. Blood pressure was measured with a mercury sphygmomanometer using a standardized technique. Results: Both systolic and diastolic blood pressure had a positive correlation with weight, height, age, and body mass index (r= 0.648, 0.643, 0.582, and 0.44, respectively (P < .001. There was no significant difference in the systolic and diastolic blood pressure in boys compared to girls of corresponding ages. However, the average annual increase in systolic blood pressure was 2.86 mm Hg in boys and 2.63 mm Hg in girls, whereas the annual increase in diastolic blood pressure was 1.72 mm Hg in boys and 1.48 mm Hg in girls. The prevalence of high and high-normal blood pressure at the upper limit of normal (between the 90 th and 95 th percentile, at risk of future hypertension if not managed adequately, was 10.5% in boys and 6.9% in girls, with similar distributions among the two sexes. Conclusions: We present the first age-specific reference values for blood pressure of Lebanese children aged 5 to 15 years based on a good representative sample. The use of these reference values should help pediatricians identify children with normal, high-normal and high blood pressure.

  14. Impact of Glycemic and Blood Pressure Variability on Surrogate Measures of Cardiovascular Outcomes in Type 2 Diabetic Patients

    OpenAIRE

    Di Flaviani, Alessandra; Picconi, Fabiana; Di Stefano, Paola; Giordani, Ilaria; Malandrucco, Ilaria; Maggio, Paola; Palazzo, Paola; Sgreccia, Fabrizio; Peraldo, Carlo; Farina, Fabrizio; Frajese, Gaetano; Frontoni, Simona

    2011-01-01

    OBJECTIVE The effect of glycemic variability (GV) on cardiovascular risk has not been fully clarified in type 2 diabetes. We evaluated the effect of GV, blood pressure (BP), and oxidative stress on intima-media thickness (IMT), left ventricular mass index (LVMI), flow-mediated dilation (FMD), and sympathovagal balance (low frequency [LF]/high frequency [HF] ratio) in 26 type 2 diabetic patients (diabetes duration 4.41 ± 4.81 years; HbA1c 6.70 ± 1.25%) receiving diet and/or metformin treatment...

  15. Interday variation and effect of transportation on indirect blood pressure measurements, plasma endothelin-1 and serum cortisol in Standardbred and Icelandic horses

    Directory of Open Access Journals (Sweden)

    Söder Josefin

    2012-06-01

    Full Text Available Abstract Background Systemic hypertension is a prominent feature in humans with metabolic syndrome (MS and this is partly caused by an enhanced endothelin-1 (ET-1 mediated vasoconstriction. There are indications that systemic hypertension might be a feature in equine metabolic syndrome (EMS but if ET-1 is involved in the development of hypertension in horses is not known. Increased levels of cortisol have also been found in humans with MS but there are no reports of this in horses. Before blood pressure, plasma ET-1 and serum cortisol can be evaluated in horses with EMS, it is necessary to investigate the interday variation of these parameters on clinically healthy horses. The aims of the present study were therefore to evaluate the interday variation and influence of transportation on systemic blood pressure, plasma ET-1 and serum cortisol in healthy Standardbred and Icelandic horses, and to detect potential breed differences. Methods Nine horses of each breed were included in the study. Blood pressure was measured and blood samples were collected between 6 and 9 am on two separate days. Eight of the horses (four of each breed were transported to a new stable were they stayed overnight. The next morning, the sampling procedure was repeated. Results The interday variation was higher for plasma ET-1 (37% than for indirect pressure measurements (8-21% and serum cortisol (18%. There were no differences in systemic blood pressure between the two breeds. The Icelandic horses had significantly lower serum cortisol and significantly higher plasma ET-1 concentrations compared to the Standardbred horses. Plasma ET-1 was significantly elevated after transportation, but systemic blood pressure and serum cortisol did not differ from the values obtained in the home environment. Conclusions Indirect blood pressure, plasma ET-1 and serum cortisol are of interest as markers for cardiovascular dysfunction in horses with EMS. The elevated plasma ET-1

  16. 一种间接测量人体血压值的新方法%A New Method of Measuring Blood Pressure Indirectly

    Institute of Scientific and Technical Information of China (English)

    赵海; 彭海霞; 朱剑; 李学波

    2012-01-01

    现有的脉搏血流参数检测仪需要事先测量人体血压,并且操作不方便,针对这一问题,提出了一种获取人体动脉血压值的新方法.该方法基于动脉血压与光电容积脉搏波特征参数的相关性理论,对特征参数与动脉收缩压和舒张压进行相关性分析,从而获得与收缩压及舒张压相关性较大的几个特征参数;然后利用线性回归的方法得到动脉血压和这几个特征参数的方程,依此求出人体的动脉血压值.该方法同传统测压方法相比,测量方便,可被应用到无创光电检测仪中,具有更广阔的应用前景.%Existing detectors for pulse flow parameters can be used only after blood pressure measurement and their operation is inconvenient. Thus a new method was proposed for measuring the human body arterial blood pressure values. Based on the relationship between arterial blood pressure and the characteristic parameters of the photoelectric volume pulse waves, correlation analysis between the parameters and arterial systolic and diastolic blood pressures was performed to determine which parameters strongly correlate to the arterial systolic and diastolic blood pressures, with the dependence of arterial blood pressure on these parameters obtained by linear regression, and human blood pressure was thus indirectly obtained. Compared with the conventional methods, the proposed one is more convenient, can be applied to non-invasive optical detectors and has more potential applications.

  17. Accurate blood pressure recording: Is it difficult?

    OpenAIRE

    Bhalla A; Singh R; D'cruz S; Lehl S; Sachdev A

    2005-01-01

    BACKGROUND: Blood pressure (BP) measurement is a routine procedure but errors are frequently committed during BP recording. AIMS AND SETTINGS: The aim of the study was to look at the prevalent practices in the institute regarding BP recording. The study was conducted in the Medicine Department at Government Medical College, Chandigarh, a teaching institute for MBBS students. METHODS: A prospective, observational study was performed amongst the 80 doctors in a tertiary care hospital. All ...

  18. Measuring Intracranial Pressure And Volume Noninvasively

    Science.gov (United States)

    Cantrell, John H.; Yost, William T.

    1994-01-01

    Ultrasonic technique eliminates need to drill into brain cavity. Intracranial dynamics instrument probes cranium ultrasonically to obtain data for determination of intracranial pressure (ICP) and pressure-volume index (PVI). Instrument determines sensitivity of skull to changes in pressure and by use of mechanical device to exert external calibrated pressure on skull. By monitoring volume of blood flowing into jugular vein, one determines change of volume of blood in cranial system. By measuring response of skull to increasing pressure (where pressure increased by tilting patient known amount) and by using cranial blood pressure, one determines intial pressure in cerebrospinal fluid. Once PVI determined, ICP determined.

  19. Endovascular blood flow measurement system

    Science.gov (United States)

    Khe, A. K.; Cherevko, A. A.; Chupakhin, A. P.; Krivoshapkin, A. L.; Orlov, K. Yu

    2016-06-01

    In this paper an endovascular measurement system used for intraoperative cerebral blood flow monitoring is described. The system is based on a Volcano ComboMap Pressure and Flow System extended with analogue-to-digital converter and PC laptop. A series of measurements performed in patients with cerebrovascular pathologies allows us to introduce “velocity-pressure” and “flow rate-energy flow rate” diagrams as important characteristics of the blood flow. The measurement system presented here can be used as an additional instrument in neurosurgery for assessment and monitoring of the operation procedure. Clinical data obtained with the system are used for construction of mathematical models and patient-specific simulations. The monitoring of the blood flow parameters during endovascular interventions was approved by the Ethics Committee at the Meshalkin Novosibirsk Research Institute of Circulation Pathology and included in certain surgical protocols for pre-, intra- and postoperative examinations.

  20. Let's Talk about High Blood Pressure and Stroke

    Science.gov (United States)

    ... Tools & Resources Stroke More Let's Talk About High Blood Pressure and Stroke Updated:Dec 9,2015 What is ... Blood Pressure? How Can I Reduce High Blood Pressure? High Blood Pressure and Stroke What Is Diabetes and How ...

  1. Validation of four automatic devices for self-measurement of blood pressure according to the international protocol of the European Society of Hypertension

    OpenAIRE

    Asmar, Roland

    2011-01-01

    Jirar Topouchian1, Davide Agnoletti1, Jacques Blacher1, Ahmed Youssef1, Isabel Ibanez2,3, Jose Khabouth2, Salwa Khawaja2, Layale Beaino2, Roland Asmar1–31Centre de Diagnostic, Hôpital Hôtel-Dieu, Paris, France; 2Hôpital Libanais and Faculté Libanaise de Médecine, Beirut, Lebanon; 3Foundation-Medical Research Institutes, Geneva, SwitzerlandBackground: Four oscillometric devices for self-measurement of blood pressure (SBPM) were eval...

  2. Grains and Potato Consumption in Association with Anthropomet¬ric Measures and Blood Pressure in Iranian Chil¬dren and Adolescents: The CASPIAN-IV Study

    OpenAIRE

    Payab, Moloud; Kelishadi, Roya; Ranjbar, Shirin Hasani; Motlagh, Mohammad Esmaeil; Ardalan, Gelayol; Hoda ZAHEDI; Sanaei, Maryam; Shafiee, Gita; Asayesh, Hamid; Bagher LARIJANI; Qorbani, Mostafa; Heshmat, Ramin

    2015-01-01

    Background: This study was aimed to investigate the association of consuming white rice and potato, as well as the bread type with anthropometric measures and blood pressure (BP) in a national sample of Iranian children and adolescents. Methods: This nationwide study was conducted in 2011-2012 among 14,880 students, aged 6-18 years, selected by multistage cluster sampling from 30 provinces of Iran. Weight, height, waist circumference (WC), hip circumference (HC), waist -to-hip ratio (WHR), wa...

  3. Validation of the integration of technology that measures additional “vascular” indices into an ambulatory blood pressure monitoring system

    OpenAIRE

    Orlov, Artemy

    2014-01-01

    Yulia V Kotovskaya,1 Zhanna D Kobalava,1 Artemy V Orlov21Propedeutics Department, Peoples’ Friendship University of Russia, 2Competitive System Analysis Department (No 65), National Research Nuclear University MEPhI, Moscow, RussiaBackground: The objective of this study was to validate the novel integration of oscillometric (Vasotens®) technology into a BPLab® ambulatory blood pressure (BP) monitoring system to measure central BP, the aortic augmentation index, and p...

  4. Blood pressure changes in dogs with babesiosis

    Directory of Open Access Journals (Sweden)

    L.S. Jacobson

    2000-07-01

    Full Text Available Systemic arterial blood pressures were measured in 30 dogs with acute babesiosis, 10 each with mild uncomplicated, severe uncomplicated and complicated disease. Ten healthy dogs were used as controls. Hypotension was defined as more than 3 standard deviations below the control mean. Normal mean pressures (±SD were: systolic arterial pressure 151 (±11 mm Hg, diastolic arterial pressure 89 (±8 mm Hg and mean arterial pressure 107 (±10 mmHg. Hypotension was the most frequent abnormality, and increased strikingly in incidence as disease severity increased, with 5/10 dogs in the complicated group being hypotensive for systolic, diastolic and mean arterial pressures, compared with 2/10 in the severe uncomplicated group and 0/10 in the mild uncomplicated group. Systolic, diastolic and mean arterial pressures in the complicated group and severe uncomplicated group, and systolic pressure in the mild uncomplicated group, were significantly lower than in the controls. There were no significant relationships between arterial pressures and age, pulse rate, respiratory rate, temperature, mucous membrane colour or haematocrit. There was a significant negative correlation between arterial pressures and white cell and immature neutrophil counts. Arterial pressures differed significantly between dogs that were clinically collapsed and those that were not, but not between survivors and non-survivors. Pulse pressure (systolic - diastolic was low in 7/10 complicated, 1/10 mild uncomplicated, and 1/10 severe uncomplicated cases, and differed significantly between the complicated and control groups. The high incidence of hypotension in clinically severe babesiosis has important implications for therapy.

  5. Water sodium, urinary electrolytes, and blood pressure of adolescents.

    OpenAIRE

    Robertson, J. S.

    1984-01-01

    Blood pressure measurements were made on children in their fourth year at secondary schools in parts of Scunthorpe Health District supplied with drinking water of varying sodium content. Of the 3131 children, 2740 were examined (1394 boys and 1346 girls). Boys had slightly higher systolic pressures and slightly lower diastolic pressures than the girls. There was no difference between the blood pressure distributions of children in areas supplied with water containing 105 mg/l sodium, 50 mg/l ...

  6. Life style as a blood pressure determinant.

    OpenAIRE

    Staessen, J A; Bieniaszewski, L; Pardaens, K; V. Petrov; Thijs, L.; Fagard, R.

    1996-01-01

    In Belgium, an affluent Western European country, participation in sports, alcohol intake, and living in a working class area were identified as the life style factors with the closest associations with the blood pressure level. Obesity was another important blood pressure correlate. Sodium intake, determined from the 24 h urinary output, and smoking were not associated with blood pressure. Controlled intervention studies have proven that weight reduction, endurance training and alcohol absti...

  7. RELATIONSHIP BETWEEN BLOOD-PRESSURE DURING HEMODIALYSIS AND AMBULATORY BLOOD-PRESSURE IN BETWEEN DIALYSES

    NARCIS (Netherlands)

    HUISMAN, RM; DEBRUIN, C; KLONT, D; SMIT, AJ

    1995-01-01

    Background. Ambulatory blood pressure measurements in haemodialysis patients are relevant in view of the high cardiovascular morbidity and mortality in chronic haemodialysis patients. Methods. Twelve normotensive patients were studied from the beginning of one dialysis until the end of the next (mea

  8. Placental programming of blood pressure in Indian children

    OpenAIRE

    Winder, Nicola R; Krishnaveni, Ghattu V.; Hill, Jacqueline C.; Karat, Chitra LS; Fall, Caroline HD; Veena, Sargoor R; Barker, David JP

    2011-01-01

    Aim To determine whether the size and shape of the placental surface predict blood pressure in childhood. Methods We studied blood pressure in 471 nine-year-old Indian children whose placental length, breadth and weight were measured in a prospective birth cohort study. Results In the daughters of short mothers (

  9. Alcohol intake and blood pressure: a systematic review implementing a Mendelian randomization approach.

    OpenAIRE

    Lina Chen; George Davey Smith; Harbord, Roger M.; Lewis, Sarah J

    2008-01-01

    Editors' Summary Background. High blood pressure (hypertension) is a common medical condition that affects nearly a third of US and UK adults. Hypertension has no symptoms but can lead to heart attacks or strokes. It is diagnosed by measuring blood pressure—the force that blood moving around the body exerts on the inside of large blood vessels. Blood pressure is highest when the heart is pumping out blood (systolic pressure) and lowest when it is filling up with blood (diastolic pressure). No...

  10. Does a colour-coded blood pressure diary improve blood pressure control for patients in general practice: the CoCo trial

    OpenAIRE

    Steurer-Stey, C.; Zoller, M.; Moshinsky, C C; Senn, O; Rosemann, T

    2010-01-01

    BACKGROUND: Insufficient blood pressure control is a frequent problem despite the existence of effective treatment. Insufficient adherence to self-monitoring as well as to therapy is a common reason. Blood pressure self-measurement at home (Home Blood Pressure Measurement, HBPM) has positive effects on treatment adherence and is helpful in achieving the target blood pressure. Only a few studies have investigated whether adherence to HBPM can be improved through simple measures resulting also ...

  11. Does a colour-coded blood pressure diary improve blood pressure control for patients in general practice: The CoCo trial

    OpenAIRE

    Senn Oliver; Moshinsky Corinne; Zoller Marco; Steurer-Stey Claudia; Rosemann Thomas

    2010-01-01

    Abstract Background Insufficient blood pressure control is a frequent problem despite the existence of effective treatment. Insufficient adherence to self-monitoring as well as to therapy is a common reason. Blood pressure self-measurement at home (Home Blood Pressure Measurement, HBPM) has positive effects on treatment adherence and is helpful in achieving the target blood pressure. Only a few studies have investigated whether adherence to HBPM can be improved through simple measures resulti...

  12. Ambulatory Blood Pressure Monitoring and Circadian Rhythm of Blood Pressure in Diabetes Mellitus

    OpenAIRE

    Elena Matteucci; Ottavio Giampietro

    2013-01-01

    Systolic and diastolic blood pressures display a circadian rhythmicity that can be assessed by 24-hour ambulatory blood pressure monitoring and analysed using the cosinor procedure. Altered characteristics to the circadian rhythm of blood pressure, which may result in adverse health outcomes, have been observed in both prediabetes and diabetes. We have investigated the circadian variability of blood pressure in patients with type 1 and type 2 diabetes. Chronobiologically interpreted ambulator...

  13. Does a colour-coded blood pressure diary improve blood pressure control for patients in general practice: The CoCo trial

    Directory of Open Access Journals (Sweden)

    Senn Oliver

    2010-04-01

    Full Text Available Abstract Background Insufficient blood pressure control is a frequent problem despite the existence of effective treatment. Insufficient adherence to self-monitoring as well as to therapy is a common reason. Blood pressure self-measurement at home (Home Blood Pressure Measurement, HBPM has positive effects on treatment adherence and is helpful in achieving the target blood pressure. Only a few studies have investigated whether adherence to HBPM can be improved through simple measures resulting also in better blood pressure control. Objective Improvement of self-monitoring and improved blood pressure control by using a new colour-coded blood pressure diary. Outcome Primary outcome: Change in systolic and/or diastolic blood pressure 6 months after using the new colour-coded blood pressure diary. Secondary outcome: Adherence to blood pressure self-measurement (number of measurements/entries. Methods/Design Randomised controlled study. Population: 138 adult patients in primary care with uncontrolled hypertension despite therapy. The control group uses a conventional blood pressure diary; the intervention group uses the new colour-coded blood pressure diary (green, yellow, red according a traffic light system. Expected results/conclusion The visual separation and entries in three colour-coded areas reflecting risk (green: blood pressure in the target range ≤ 140/≤ 90 mmHg, yellow: blood pressure >140/>90 mmHg, red: blood pressure in danger zone > 180 mmHg/>110 mmHg lead to better self-monitoring compared with the conventional (non-colour-coded blood pressure booklet. The colour-coded, visualised information supports improved perception (awareness and interpretation of blood pressure and triggers correct behaviour, in the means of improved adherence to the recommended treatment as well as better communication between patients and doctors resulting in improved blood pressure control. Trial registration ClinicalTrials.gov ID NCT01013467

  14. CIRCADIAN BLOOD PRESSURE VARIABILITY AND EXERCISE THERAPY

    OpenAIRE

    HAVELKOVÁ, A.; SIEGELOVÁ, J.; FIŠER, B.; MÍFKOVÁ, L.; CHLUDILOVÁ, V.; POCHMONOVÁ, J.; VANK, P.; POHANKA, M.; DUŠEK, J.; Cornélissen, G.; Halberg, F.

    2007-01-01

    The objective of this study was to find if there was a relationship between the time when cardiovascular rehabilitation was running in the patients after myocardial infarction and an average daily value of systolic and diastolic blood pressure at 7-day ambulatory blood pressure monitoring.

  15. 基于脉搏波传导时间的连续血压监测系统%Continuous Blood Pressure Measurement based on Pulse Transit Time

    Institute of Scientific and Technical Information of China (English)

    白丽红; 王成; 文苗; 张通

    2014-01-01

    To achieve continuous non-invasive blood pressure measurement,a method based on pulse transit time (PTT)was presented.We got PTT from electrocardiograph(ECG)and photoplethysmograph(PPG).The start point of PTT on ECG-R wave point and the stop point of PTT on PPG characteristic point was gotten.The mathematical model of systolic blood pressure (SBP)and dias-tolic blood pressure (DBP)were gotten by making regression analysis between PTT and SBP or DBP measured with a mercury sphyg-momanometer.Forty-one healthy young people were studied using this method.The correlation coefficients of SBP and DBP between our system and the mercury sphygmomanometer were 0.82 and 0.73,respectively.It was found that the estimated SBP and DBP dif-fered from the reference BP by 0.15 ±2.05 mmHg and 0.12 ±2.16 mmHg,respectively.The Bland-Altman method was used to check the consistency of the blood pressure measured by our system and the mercury sphygmomanometer.The results show that blood pressure measured by this method is good agreed with which measured by mercury sphygmomanometer.%为了实现无创连续血压测量,提出了一种基于脉搏波传导时间(pulse transit time,PTT)的连续血压测量方案。通过同步采集心电(electrocardiogram,ECG)信号与光电脉搏波(photoplethysmograph,PPG)信号,以ECG的R波峰值点作为PTT的开始点,PPG信号的最大值点作为PTT的结束点,得到PTT,与水银血压计测得舒张压(diastolic blood pressure ,DBP)与收缩压(systolic blood pressure ,SBP)进行回归分析,得到了DBP和SBP的数学模型。利用该方法对41名身体健康的青年人进行实验,利用本方案得到的SBP与水银血压计的相关系数为0.82,其差值的平均数与标准偏差为0.15±2.05 mmHg;得到的DBP与水银血压计的相关系数为0.73,其差值的平均数与标准偏差为0.12±2.16 mmHg。利用Bland-Altman差值法对本系统血压测量方法与水银

  16. Blood pressure regulation in diabetic autonomic neuropathy

    DEFF Research Database (Denmark)

    Hilsted, J

    1985-01-01

    Defective blood pressure responses to standing, exercise and epinephrine infusions have been demonstrated in diabetic patients with autonomic neuropathy. The circulatory mechanisms underlying blood pressure responses to exercise and standing up in these patients are well characterized: In both...... which may contribute to exercise hypotension in these patients. During hypoglycemia, blood pressure regulation seems intact in patients with autonomic neuropathy. This is probably due to release of substantial amounts of catecholamines during these experiments. During epinephrine infusions a substantial...... blood pressure fall ensues in patients with autonomic neuropathy, probably due to excessive muscular vasodilation. It is unresolved why blood pressure regulation is intact during hypoglycemia and severely impaired--at similar catecholamine concentrations--during epinephrine infusions....

  17. Home readings of blood pressure in assessment of hypertensive subjects

    DEFF Research Database (Denmark)

    Nielsen, P.E.; Myschetzky, P; Andersen, A R;

    1986-01-01

    Out-patient clinic blood pressure (OPC-BP) was compared to home blood pressure (Home-BP) measured three times daily during a two week period in 122 consecutively referred hypertensive subjects. A semi-automatic device (TM-101) including a microphone for detection of Korotkoff-sounds, self......-deflation of cuff pressure and digital display of blood pressure was used. Mean difference between OPC-BP and Home-BP was systolic +13 mm Hg (range -21 - +100 mg Hg) and diastolic +5 mm Hg (range -27 - +36 mm Hg). Although a significant correlation could be demonstrated between Home-BP and OPC-BP, the inter...

  18. Interrater and intrarater reliability of photoplethysmography for measuring toe blood pressure and toe-brachial index in people with diabetes mellitus

    Directory of Open Access Journals (Sweden)

    Scanlon Christopher

    2012-06-01

    Full Text Available Abstract Background A reliable tool to measure arterial flow to the feet in people with diabetes is required given that they are particularly prone to peripheral arterial disease. Traditionally, the ankle brachial index (ABI has been used to measure arterial circulation, but its application is limited due to calcification of larger arteries. More recently, toe pressure and the toe brachial index (TBI has been suggested as superior to ABI measurements because they assess smaller digital arteries less prone to arterial calcification. However, reliability studies for the clinical use of photoplethysmography (PPG in people with diabetes are lacking. Methods Sixty people with diabetes mellitus (35 males and 25 females, mean age 59.6 yrs consented to take part in the study. The majority (92% had type 2 diabetes and 8% had type 1 diabetes. Forty-three percent were diagnosed as having peripheral neuropathy when tested using a biothesiometer and 15% were current smokers (10 – 40/day. A podiatrist and a diabetes educator measured toe and brachial blood pressure independently and in a random order using PPG. These measurements were repeated again seven days later, and subsequently analysed with intraclass correlation coefficients (ICC, 95% confidence intervals (CI and standard error of measurement (SEM. Results The intrarater reliability of measuring toe pressures was excellent (ICC3,1 =0.78-0.79, SEM 8 mmHg and interrater reliability was also excellent (ICC2,2 = 0.93, SEM 4 mmHg. The intrarater reliability for measuring brachial pressures was generally poor (ICC3,1 = 0.40 – 0.42, SEM 19 mmHg and interrater reliability was fair-good (ICC2,2. 0.65, SEM 14 mmHg. The TBI intrarater reliability was fair-good (ICC3,1 = 0.51-0.72, SEM 0.08, whilst the interrater reliability of TBI was excellent (ICC2,2 = 0.85, SEM 0.07. Conclusions Based on these results, interrater and intrarater reliability of PPG is excellent for measuring toe

  19. Consistenyc of perioperative invasive blood pressure m easurement with non-invasive blood pressure measurement for lower extremities in patients undergoing general anesth esia%全麻手术患者围术期下肢有创血压与无创血压的一致性分析

    Institute of Scientific and Technical Information of China (English)

    衣晓卓; 李天发; 王红霞; 夏豪; 周期

    2016-01-01

    Objective To analyze the consistency of perioperative invasive blood pressure measurement with non -invasive blood pressure measurement for lower extremities in patients undergoing general anesthesia .Methods Thirty patients receiving neurosurgery were enrolled and underwent intravenous general anesthesia .The non-invasive blood pressure of the ankle and the invasive blood pressure of the ipsilateral dorsal artery were monitored in all cases during surgery and after surgery .The results of the two blood pressure measurements were compared.Results Within 0-4 hours after the surgery starting,the systolic blood pressure and diastolic blood pressure of the ankle measured by the invasive method were higher than those measured by the non -invasive method(P<0.05).Within 4-16 hours after the surgery starting ,there was no significant difference in the systolic blood pressure or diastolic blood pressure between two methods .For patientsundergoing general anesthesia ,good consistency existed between the two measurements for perioperative systolic blood pressure and diastolic blood pressure of lower extremities (Kappa=0.70,0.79).Conc lusion For patients undergoing general anesthesia ,non-invasive blood pressure measurement is consistent with invasive blood pressure measurement for perioperative blood pressure of lower extremities . However ,difference still exists between the two methods , therefore the blood pressure measurement should be chosen according to the specific circumstances of the patients during surgery .%目的:分析全麻手术患者围术期下肢有创血压与无创血压的一致性。方法选取行神经外科手术的患者30例,均行静脉全身麻醉。术中及术后同时监测患者脚踝部的无创血压及同侧足背动脉的有创血压,对两种血压进行比较。结果在手术开始后0~4 h内,有创测量脚踝部的收缩压及舒张压测量值均高于无创测量(P<0.05),在手术开始后4~16 h,两种测量

  20. Noninvasive 24-hour ambulatory arterial blood pressure monitoring in cirrhosis

    DEFF Research Database (Denmark)

    Møller, Søren; Wiinberg, N; Henriksen, Jens Henrik

    1995-01-01

    Cirrhotic patients have disturbed systemic hemodynamics with reduced arterial blood pressure, but this has not been investigated during daily activity and sleep. Systolic (SBP), diastolic (DBP), and mean arterial blood pressure (MAP), and heart rate (HR) were measured by an automatic ambulant...... device for monitoring blood pressure in 35 patients with cirrhosis and 35 healthy matched controls. During the daytime, SBP, DBP, and MAP were significantly lower in the patients than in the controls (median 118 vs. 127; 70 vs. 78; 86 vs. 94 mm Hg, P < .0001 to P < .05). The nighttime blood pressures...... were almost similar in the two groups (108 vs. 110; 65 vs. 67; 78 vs. 82 mm Hg, NS). Conversely, HR was significantly higher in the patients both in the daytime (86 vs. 72/min, P < .0001) and at night (80 vs. 64/min, P < .0001). Consequently, the reduction in blood pressure and HR from daytime to...

  1. SYSTOLIC BLOOD PRESSURE: BIOPHYSICAL, AGE AND GENDER FEATURES

    Directory of Open Access Journals (Sweden)

    L.I. Malinova

    2008-03-01

    Full Text Available The article is devoted to the study of systolic blood pressure features in the population of large industrial center. On the basis of measurement of blood pressure in adult population of three city regions there were revealed the following age-related changes in systolic blood pressure in men: three periods of rise and two periods of stabilization. The principal difference in women is the absence of the periods of rise and stabilization, lower level of blood pressure in young and middle aged people and authentically higher level of blood pressure - in elderly women. The increase of haemodynamical loading for one year of life in men of the middle (2 times and elder ages (3 times was revealed, that was not typical forwomen.

  2. Proton-Pump Inhibitors Therapy and Blood Pressure Control

    OpenAIRE

    Juan Francisco Sánchez Muñoz-Torrero; Pedro Joya-Vazquez; M Asunción Bacaicoa; Raul Velasco; Jose L. Chicón; Sara Trejo; M. Antonia Carrasco; N. Roberto Robles

    2014-01-01

    Objective: To evaluate  the potential impact of inhibitors of proton-pump in blood-pressure. .Methods: In a 24-hour-ambulatory-blood-pressure-monitoring (AMBP)-database we analyzed records of 462-hypertensive-patients according Proton-Pump Inhibitors (PPI). 150(33%)-patients were regularly users of PPI, and 312(67%) nonusers of PPI. Ambulatory-blood-pressure was measured non-invasively for 24--hours by the Spacelab-devices programmed-to-measure every 20-minutes during-daytime and every 60-min...

  3. Measurement of endolymphatic pressure.

    Science.gov (United States)

    Mom, T; Pavier, Y; Giraudet, F; Gilain, L; Avan, P

    2015-04-01

    Endolymphatic pressure measurement is of interest both to researchers in the physiology and pathophysiology of hearing and ENT physicians dealing with Menière's disease or similar conditions. It is generally agreed that endolymphatic hydrops is associated with Menière's disease and is accompanied by increased hydrostatic pressure. Endolymphatic pressure, however, cannot be measured precisely without endangering hearing, making the association between hydrops and increased endolymphatic pressure difficult to demonstrate. Several integrated in vivo models have been developed since the 1960s, but only a few allow measurement of endolymphatic hydrostatic pressure. Models associating measurement of hydrostatic pressure and endolymphatic potential and assessment of cochlear function are of value to elucidate the pathophysiology of endolymphatic hydrops. The present article presents the main types of models and discusses their respective interest. PMID:25467202

  4. Improvement and development of non-invasive blood pressure measurement techniques%无创血压测量技术的改进与进展

    Institute of Scientific and Technical Information of China (English)

    郑理华; 窦建洪; 何兴华; 屠伟峰; 马铭俊; 吴昊

    2013-01-01

    This paper reviews the improvement and development of some general non-invasive blood pressure measurement(NBPM)techniques, e.g. korotkoff sound method, oscillometric method and double cuff method. The new practical techniques and methods at home and abroad and perspective of non-invasive continuous blood pressure measurement(NCBPM)have also been presented systematically in this article, such as arterial tonometry method, arterial volumn clamp method, pulse-wave velocity method, ultrasonic method and the application of wavelet analysis and fuzzy recognition. Finally, it's pointed out that NBPM, especially NCBPM, has a huge market demand. Pulse-wave velocity method can achieve real non-invasive continuous blood pressure measurement and thus has abroad application. Research progress of methods and theories of continuous non-invasive measurement of blood pressure will be a desired direction.%介绍数种常规的无创血压测量方法-柯氏音法、示波法和双袖带法及其改进.重点对国际上连续无创血压测量的新型实用技术、方法及前景进行较为详细的介绍,如动脉张力测量法、动脉容积钳制法、脉搏波速度测量法、超声测压法以及小波分析和模糊识别技术在血压信号处理中的应用等.指出无创血压测量技术,尤其是无创连续血压测量方法有着巨大的市场需求;脉搏波速度测量法能实现真正意义上的连续无创血压测量,因此具有广泛的应用前景,而采用新理论进行连续的无创血压测量将是该领域的目标和发展方向.

  5. Maternal Blood Pressure During Pregnancy and Early Childhood Blood Pressures in the Offspring: The GUSTO Birth Cohort Study.

    Science.gov (United States)

    Lim, Wai-Yee; Lee, Yung-Seng; Yap, Fabian Kok-Peng; Aris, Izzudin Mohd; Ngee, Lek; Meaney, Michael; Gluckman, Peter D; Godfrey, Keith M; Kwek, Kenneth; Chong, Yap-Seng; Saw, Seang-Mei; Pan, An

    2015-11-01

    Although epidemiological studies suggest that offspring of women with preeclampsia are at increased risk to higher blood pressures and cardiovascular disease, little is known about the nature of blood pressures between the mother and her offspring. As blood pressures comprise of both pulsatile (systolic blood pressure [SBP] and pulse pressure [PP]) and stable (diastolic blood pressure [DBP]) components, and they differ between central and peripheral sites, we sought to examine maternal peripheral and central blood pressure components in relation to offspring early childhood blood pressures. A prospective birth cohort of 567 Chinese, Malay, and Indian mother-offspring with complete blood pressure information were studied. Maternal brachial artery SBP, DBP, and PP were measured at 26 to 28 weeks gestation; and central SBP and PP were estimated from radial artery waveforms. Offspring brachial artery SBP, DBP, and PP were measured at 3 years of age. Associations between continuous variables of maternal blood pressures (peripheral SBP, DBP, PP, central SBP, and PP) and offspring blood pressures (peripheral SBP, DBP, and PP) were examined using multiple linear regression with adjustment for maternal characteristics (age, education level, parity, smoking status, alcohol consumption and physical activity during pregnancy, and pre-pregnancy BMI) and offspring characteristics (sex, ethnicity, BMI, and height at 3 years of age). In the multivariate models, offspring peripheral SBP increased by 0.08 (95% confidence interval 0.00-0.17, P = 0.06) mmHg with every 1-mmHg increase in maternal central SBP, and offspring peripheral PP increased by 0.10 (0.01-0.18, P = 0.03) mmHg for every 1-mmHg increase in maternal central PP. The relations of maternal-offspring peripheral blood pressures (SBP, DBP, and PP) were positive but not statistically significant, and the corresponding values were 0.05 (-0.03 to 0.13; P = 0.21), 0.03 (-0.04 to 0.10; P = 0.35), and 0.05 (-0

  6. Development of brain damage as measured by brain impedance recordings, and changes in heart rate, and blood pressure induced by different stunning and killing methods.

    Science.gov (United States)

    Savenije, B; Lambooij, E; Gerritzen, M A; Korf, J

    2002-04-01

    Poultry are electrically stunned before slaughter to induce unconsciousness and to immobilize the chickens for easier killing. From a welfare point of view, electrical stunning should induce immediate and lasting unconsciousness in the chicken. As an alternative to electroencephalography, which measures brain electrical activity, this study used brain impedance recordings, which measure brain metabolic activity, to determine the onset and development of brain damage. Fifty-six chickens were surgically equipped with brain electrodes and a canula in the wing artery and were subjected to one of seven stunning and killing methods: whole body electrical stunning; head-only electrical stunning at 50, 100 or 150 V; or an i.v. injection with MgCl2. After 30 s, the chickens were exsanguinated. Brain impedance and blood pressure were measured. Extracellular volume was determined from the brain impedance data and heart rate from the blood pressure data. An immediate and progressive reduction in extracellular volume in all chickens was found only with whole body stunning at 150 V. This treatment also caused cardiac fibrillation or arrest in all chickens. With all other electrical stunning treatments, extracellular volume was immediately reduced in some but not all birds, and cardiac fibrillation or arrest was not often found. Ischemic conditions, caused by cessation of the circulation, stimulated this epileptic effect. A stunner setting of 150 V is therefore recommended to ensure immediate and lasting unconsciousness, which is a requirement for humane slaughter. PMID:11989758

  7. Grains and Potato Consumption in Association with Anthropomet¬ric Measures and Blood Pressure in Iranian Chil¬dren and Adolescents: The CASPIAN-IV Study

    Directory of Open Access Journals (Sweden)

    Moloud PAYAB

    2015-10-01

    Full Text Available Background: This study was aimed to investigate the association of consuming white rice and potato, as well as the bread type with anthropometric measures and blood pressure (BP in a national sample of Iranian children and adolescents. Methods: This nationwide study was conducted in 2011-2012 among 14,880 students, aged 6-18 years, selected by multistage cluster sampling from 30 provinces of Iran. Weight, height, waist circumference (WC, hip circumference (HC, waist -to-hip ratio (WHR, waist-to- height ratio (WHtR, as well as systolic and diastolic blood pressure (SBP, DBP were measured. The self-reported frequency consumption of white rice and potato (daily or non-daily, as well as consumed bread type were asked. Results: The mean (SD age of participants was 12.47 (3.36. They were consisted of 50.76% girls and 75.57% urban residents. The intake of white rice had significant positive association with anthropometric indices and SBP levels (P-value<0.05. In crude and adjusted models, white rice consumption was significantly associated with BMI (0.29(0.06-0.51 and 0.19(0.02-0.35. Likewise, significant association existed between the type of the bread and anthropometric indices (except for WHR. Potato consumption was significantly associated with anthropometric indices (except for WHR and WHtR and BP levels. In adjusted model, potato consumption had significant positive association with BMI. For every increase in the frequency of daily consumption of white rice, 0.19 units were added to BMI.Conclusion: White rice consumption increases the risk of general and abdominal obesity in children and adolescents. Consequently, for prevention and control of obesity, the consumption of refined grains should be limited by moderating nutrition policies. Keywords: Grains, High blood pressure, Obesity, Anthropometric indices, Iran 

  8. Measurement of bone blood flow in sheep

    International Nuclear Information System (INIS)

    Bone blood flow in sheep tibia has been estimated via the measurement of the perfusion limited clearance of 41Ar from the bone mineral matrix following fast neutron activation of 44Ca. Tibia blood flows were estimated for the intact sheep, and after the installation of an intramedullary pressure tap to elevate bone marrow pressure by saline infusion. The results indicate that normal blood flow in the tibia is in the range of 1.1 to 3.7 ml/100ml-min in the intact animal and at normal marrow pressure. With an elevated intramedullary pressure of approximately 100 mmHg, the bone blood flow measured varied around 0.5 to 1.1 ml/100ml-min. 12 refs., 5 figs., 1 tab

  9. Booze, High Blood Pressure a Dangerous Mix

    Science.gov (United States)

    ... in New York City. Until published in a peer-reviewed medical journal, the results should be considered preliminary. One-third of U.S. adults have high blood pressure, also called hypertension. It contributes to more than ...

  10. Elderly Benefit from Intensive Blood Pressure Treatment

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_158958.html Elderly Benefit From Intensive Blood Pressure Treatment No greater ... The study included more than 2,600 patients, aged 75 and older. They were randomly assigned to ...

  11. Obesity Can Send Kids' Blood Pressure Soaring

    Science.gov (United States)

    ... nlm.nih.gov/medlineplus/news/fullstory_157363.html Obesity Can Send Kids' Blood Pressure Soaring: Study Losing ... and effective clinical and public health strategies for obesity prevention," said lead researcher Emily Parker. She is ...

  12. Pressure measuring probe

    Science.gov (United States)

    Ashby, George C., Jr. (Inventor)

    1988-01-01

    The invention is a probe for measuring changes in pressure in a high velocity fluid stream over and adjacent to the surface of an object. The probe is formed of an exterior housing having a closed pressure chamber in which a piezoelectric pressure transducer is mounted. An open connector tube having a probe tip passes a portion of the fluid stream into the closed pressure chamber; any change of pressure within, which requires a settling-time to appear in the closed pressure chamber, is inversely proportional to the cross-sectional area of the connector tube. A cooling chamber formed around the pressure chamber is connected to a source of cooling fluid by means of inlet and outlet tubes.

  13. Blood pressure management in cardiovascular risk stratification : procedure, progression, process

    OpenAIRE

    Adiyaman, A.

    2009-01-01

    In this thesis we have explored different aspects of blood pressure measurement and related it to the risk of cardiovascular disease. In the first part we showed that when the arm is positioned under heart level, for example when the arm is placed on a desk or a chair support, the blood pressure and the cardiovascular risk is overstimated. We demonstrated that crossing the legs at the level of the knee, but not at the level of the ankle, causes a rise of blood pressure. We proved that the phy...

  14. Clinical application of a right ventricular pressure-volume loop determined by gated blood-pool imaging and simultaneously measured right ventricular pressure

    International Nuclear Information System (INIS)

    The data obtained by ECG-gated radionuclide angiography were collected simultaneously with right ventricular pressure and thermal cardiac output (CO) obtained by a Swan-Ganz catheter in Scintipac 1200 (Shimazu Co) in order to create a right ventricular pressure-volume (RV P-V) loop. Subjects consisted of 15 patients with old myocardial infarction (MI group), seven with angina pectoris (AP group), six with congestive cardiomyopathy (CCM group) and five with neurocirculatory asthenia (NCA group). Right ventricular end-diastolic volume (RVEDV) was calculated as RVEDV = CO/(EF x HR) (CO = cardiac output; HR = heart rate). Systolic work (W sub(S)), diastolic work (W sub(D)) and net work (W sub(N)) were calculated from a RV P-V loop by Simpson's method. The measurements were performed before and 5 min after sublingual administration of nitroglycerin (NG) (0.3 mg). The results were as follows: 1. RV P-V loops shifted towards the left lower part of the P-V plane after sublingual administration of nitroglycerin, indicating the reduction of pressure and volume of the right ventricle. 2. Right ventricular ejection fraction (RVEF) in the MI, AP and CCM groups showed smaller values than that of the NCA group. 3. Right ventricular end-diastolic volume index (RVEDVI) showed a converse relation with RVEF. 4. Cardiac index in all groups decreased after NG and a statistical significance was seen in the MI, AP and NCA groups (p<0.05). 5. RV W sub(S), RV W sub(D) and RV W sub(N) showed no difference among each groups in the control state, and significantly decreased after NG. We conclude that the present method using RV P-V loop might be useful as a noninvasive bedside monitoring and permits the evaluation of RV function in a clinical setting

  15. Clinical application of a right ventricular pressure-volume loop determined by gated blood-pool imaging and simultaneously measured right ventricular pressure

    Energy Technology Data Exchange (ETDEWEB)

    Yasue, Takao; Watanabe, Sachiro; Sugishita, Nobuyoshi; Tanaka, Tsutomu; Yokoyama, Hideo (Prefectural Gifu Hospital (Japan))

    1983-09-01

    The data obtained by ECG-gated radionuclide angiography were collected simultaneously with right ventricular pressure and thermal cardiac output (CO) obtained by a Swan-Ganz catheter in Scintipac 1200 (Shimazu Co) in order to create a right ventricular pressure-volume (RV P-V) loop. Subjects consisted of 15 patients with old myocardial infarction (MI group), seven with angina pectoris (AP group), six with congestive cardiomyopathy (CCM group) and five with neurocirculatory asthenia (NCA group). Right ventricular end-diastolic volume (RVEDV) was calculated as RVEDV = CO/(EF x HR) (CO = cardiac output; HR = heart rate). Systolic work (W sub(S)), diastolic work (W sub(D)) and net work (W sub(N)) were calculated from a RV P-V loop by Simpson's method. The measurements were performed before and 5 min after sublingual administration of nitroglycerin (NG) (0.3 mg). The results were as follows: 1. RV P-V loops shifted towards the left lower part of the P-V plane after sublingual administration of nitroglycerin, indicating the reduction of pressure and volume of the right ventricle. 2. Right ventricular ejection fraction (RVEF) in the MI, AP and CCM groups showed smaller values than that of the NCA group. 3. Right ventricular end-diastolic volume index (RVEDVI) showed a converse relation with RVEF. 4. Cardiac index in all groups decreased after NG and a statistical significance was seen in the MI, AP and NCA groups (p<0.05). 5. RV W sub(S), RV W sub(D) and RV W sub(N) showed no difference among each groups in the control state, and significantly decreased after NG. We conclude that the present method using RV P-V loop might be useful as a noninvasive bedside monitoring and permits the evaluation of RV function in a clinical setting.

  16. Association between blood pressure levels over time and brain atrophy in the elderly

    NARCIS (Netherlands)

    den Heijer, T; Skoog, [No Value; Oudkerk, M; de Leeuw, FE; de Groot, JC; Hofman, A; Breteler, MMB

    2003-01-01

    The relation between blood pressure level and degree of global brain atrophy is equivocal. We evaluated past and present blood pressure levels and change in blood pressure over 20 years in relation to the degree of cortical atrophy on magnetic resonance imaging (MRI). In 1995-1996, we measured blood

  17. 21 CFR 868.1200 - Indwelling blood oxygen partial pressure (PO2) analyzer.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Indwelling blood oxygen partial pressure (PO2... Indwelling blood oxygen partial pressure (PO2) analyzer. (a) Identification. An indwelling blood oxygen... electrode) and that is used to measure, in vivo, the partial pressure of oxygen in blood to aid...

  18. Estimated daily salt intake in relation to blood pressure and blood lipids

    DEFF Research Database (Denmark)

    Thuesen, Betina H; Toft, Ulla; Buhelt, Lone P;

    2015-01-01

    BACKGROUND: Excessive salt intake causes increased blood pressure which is considered the leading risk for premature death. One major challenge when evaluating associations between daily salt intake and markers of non-communicable diseases is that a high daily salt intake correlates with obesity......, which is also a well described risk factor for poor cardiometabolic outcome. The aim of this study was to evaluate the relationship of estimated daily salt intake with blood pressure and blood lipids and to investigate the effect of taking different measures of obesity into account. METHODS: We included...... estimated 24-hour sodium excretion with blood pressure and blood lipids were evaluated by linear regression models. RESULTS: The daily mean estimated intake of salt was 10.80 g and 7.52 g among men and women, respectively. Daily salt intake was significantly associated with blood pressure (β-estimates 1...

  19. [Blood pressure measurement--do not sweat the small stuff and it is all small stuff?! Position paper of the Croatian national referral center for hypertension, center of excellence of the European Society of Hypertension].

    Science.gov (United States)

    Vrdoljak, Ana; Vrkić, Tajana Zeljković; Kos, Jelena; Vitale, Ksenija; Premuzić, Vedran; Laganović, Mario; Jelaković, Bojan

    2014-01-01

    Office blood pressure measurement using mercury sphygmomanometer is the gold standard for making diagnoses of hypertension, evaluation of cardiovascular risk and estimation of obtained control of treated hypertensives. The vast majority of epidemiologic data are based on this method. However, the importance of blood pressure variability, white coat effect as well as availability of simple devices, home and ambulatory blood pressure measurements became routine parts in routine clinical work. As mercury will be soon forbidden in clinical work such devices and methodology will be even more important. In everyday clinical practice all three techniques should be implemented and in this paper advantages and drawbacks of all techniques are discussed. In the end, based on recent data and recommendations of international societies, diagnostic algorithm was proposed. Additionally, we described the technique of non-invasive central blood pressure measurement, determination of pulse wave velocity and calculation of augmentation index, new proposed risk factors. PMID:24720154

  20. What about African Americans and High Blood Pressure?

    Science.gov (United States)

    ANSWERS by heart Lifestyle + Risk Reduction High Blood Pressure What About African Americans and High Blood Pressure? The prevalence of high blood pressure in African Americans is among the highest in ...

  1. Talk with Your Health Care Provider about High Blood Pressure

    Science.gov (United States)

    ... Circulation Talk With Your Health Care Provider About High Blood Pressure Why is high blood pressure dangerous? Blood pressure is the force of blood ... pur-TEN-shun”). If it is not controlled, high blood pressure can cause: yy Stroke yy Kidney yy Heart ...

  2. Validation of four automatic devices for self-measurement of blood pressure according to the international protocol of the European Society of Hypertension

    Directory of Open Access Journals (Sweden)

    Topouchian J

    2011-11-01

    Full Text Available Jirar Topouchian1, Davide Agnoletti1, Jacques Blacher1, Ahmed Youssef1, Isabel Ibanez2,3, Jose Khabouth2, Salwa Khawaja2, Layale Beaino2, Roland Asmar1–31Centre de Diagnostic, Hôpital Hôtel-Dieu, Paris, France; 2Hôpital Libanais and Faculté Libanaise de Médecine, Beirut, Lebanon; 3Foundation-Medical Research Institutes, Geneva, SwitzerlandBackground: Four oscillometric devices for self-measurement of blood pressure (SBPM were evaluated according to the European Society of Hypertension (ESH international protocol and its 2010 revision in four separate studies. The Omron® M2, Omron M3, and Omron M6 measure blood pressure (BP at the brachial level, while the Omron R2 measures BP at the wrist level.Methods: The international protocol requires a total number of 33 subjects in which the validation is performed. The Omron M2 and Omron R2 were validated in 2009 according to the ESH international protocol, while the Omron M3 and Omron M6 were validated in 2010–2011 according to the 2010 ESH international protocol revision. The protocol procedures were followed precisely.Results: All four tested devices passed the validation process. The mean differences between the device and mercury readings were 2.7 ± 5.0 and –1.4 ± 3.2 mmHg for systolic and diastolic BP, respectively, using the Omron M2 device, and 1.7 ± 3.2 and –0.9 ± 2.6 mmHg using the Omron M3, 1.6 ± 2.9 and -0.9 ± 2.5 mmHg using the Omron M6, and –1.1 ± 4.8 and –0.9 ± 4.3 mmHg using the Omron R2.Conclusion: Readings from the Omron M2, Omron M3, Omron M6, and Omron R2, differing by less than 5, 10, and 15 mmHg, fulfill the ESH international protocol and its 2010 revision requirements. Therefore, each of these four devices can be used by patients for SBPM.Keywords: Omron R2, M2, M3, M6, blood pressure measurement, validation, international protocol, European Society of Hypertension

  3. Comparison of non-invasive and invasive blood pressure in aeromedical care.

    Science.gov (United States)

    McMahon, N; Hogg, L A; Corfield, A R; Exton, A D

    2012-12-01

    Blood pressure measurement is an essential physiological measurement for all critically ill patients. Previous work has shown that non-invasive blood pressure is not an accurate reflection of invasive blood pressure measurement. In a transport environment, the effects of motion and vibration may make non-invasive blood pressure less accurate. Consecutive critically ill patients transported by a dedicated aeromedical retrieval and critical care transfer service with simultaneous invasive and non-invasive blood pressure measurements were analysed. Two sets of measurements were recorded, first in a hospital environment before departure (pre-flight) and a second during aeromedical transport (in-flight). A total of 56 complete sets of data were analysed. Bland-Altman plots showed limits of agreement (precision) for pre-flight systolic blood pressure were -37.3 mmHg to 30.0 mmHg, and for pre-flight mean arterial pressure -20.5 mmHg to 25.0 mmHg. The limits of agreement for in-flight systolic blood pressure were -40.6 mmHg to 33.1 mmHg, while those for in-flight mean blood pressure in-flight were -23.6 mmHg to 24.6 mmHg. The bias for the four conditions ranged from 0.5 to -3.8 mmHg. There were no significant differences in values between pre-flight and in-flight blood pressure measurements for all categories of blood pressure measurement. Thus, our data show that non-invasive blood pressure is not a precise reflection of invasive intra-arterial blood pressure. Mean blood pressure measured non-invasively may be a better marker of invasive blood pressure than systolic blood pressure. Our data show no evidence of non-invasive blood pressures being less accurate in an aeromedical transport environment. PMID:23033983

  4. Effect of overtime work on 24-hour ambulatory blood pressure.

    Science.gov (United States)

    Hayashi, T; Kobayashi, Y; Yamaoka, K; Yano, E

    1996-10-01

    Recently, the adverse effects of long working hours on the cardiovascular systems of workers in Japan, including "Karoshi" (death from overwork), have been the focus of social concern. However, conventional methods of health checkups are often unable to detect the early signs of such adverse effects. To evaluate the influence of overtime work on the cardiovascular system, we compared 24-hour blood pressure measurements among several groups of male white-collar workers. As a result, for those with normal blood pressure and those with mild hypertension, the 24-hour average blood pressure of the overtime groups was higher than that of the control groups; for those who periodically did overtime work, the 24-hour average blood pressure and heart rate during the busy period increased. These results indicate that the burden on the cardiovascular system of white-collar workers increases with overtime work. PMID:8899576

  5. Variability of arterial blood pressure in normal and hypertensive pregnancy.

    Science.gov (United States)

    Oney, T; Meyer-Sabellek, W

    1990-12-01

    In normal pregnancy the circadian blood pressure rhythm is similar to that in the non-pregnant state, with the highest blood pressure values in the morning and the lowest at midnight. This rhythm is lost in patients with pre-eclampsia. Women with severe pre-eclampsia show a reversed circadian rhythm, with a nocturnal increase in blood pressure during the sleeping phase. Although the reasons for this nocturnal hypertension in severe pre-eclampsia are poorly understood, the results suggest that pre-eclamptic women are endangered by hypertensive emergencies, mostly at night. Therefore blood pressure measurement should be extended to the night, and antihypertensive treatment must be adapted to the demands of a reversed circadian rhythm in relevant subgroups of patients. PMID:2082002

  6. Blood Pressure Standards for Shiraz (Southern Iran School Children in Relation to Height

    Directory of Open Access Journals (Sweden)

    Seyyed Mohammad-Taghi Ayatollahi

    2012-06-01

    Full Text Available Objective: This study aims at providing local reference values for blood pressure by height and determining distribution pattern of systolic and diastolic blood pressure in 6.5-11.5 elementary school children for the first time in Shiraz (Southern Iran.Methods: Height, systolic blood pressure (SBP and diastolic blood pressure (DBP were measured with standard methods in 2270 healthy school children (1174 boys, 1096 girls who were selected by multi-stage random sampling in 2003-2004 academic years. We produced blood pressure percentiles by height percentiles using Healy-Rasbash-Yang method.Findings: The blood pressure (both systolic and diastolic tends to increase with age, but after adjusting the measurements for height, no significant correlation was found between either systolic blood pressure or diastolic blood pressure and age (r=-0.03 and P=0.15 for systolic blood pressure, r=-0.005 and P=0.8 for diastolic blood pressure. Then systolic and diastolic blood pressure percentile values by age and height percentiles, and blood pressure smoothed centiles by height in 6.5-11.5 years school children were derived.Conclusion: Due to genetic, cultural and environmental differences among populations, it is suggested to use local blood pressure standards in Iran. We produced blood pressure percentiles by height instead of age because it seems that it would lead to better evaluation for real hypertensive diagnosis.

  7. Effect on blood pressure of daily lemon ingestion and walking.

    Science.gov (United States)

    Kato, Yoji; Domoto, Tokio; Hiramitsu, Masanori; Katagiri, Takao; Sato, Kimiko; Miyake, Yukiko; Aoi, Satomi; Ishihara, Katsuhide; Ikeda, Hiromi; Umei, Namiko; Takigawa, Atsusi; Harada, Toshihide

    2014-01-01

    Background. Recent studies suggest that the daily intake of lemon (Citrus limon) has a good effect on health, but this has not been confirmed in humans. In our previous studies, it was observed that people who are conscious of their health performed more lemon intake and exercise. An analysis that took this into account was required. Methodology. For 101 middle-aged women in an island area in Hiroshima, Japan, a record of lemon ingestion efforts and the number of steps walked was carried out for five months. The change rates (Δ%) of the physical measurements, blood test, blood pressure, and pulse wave measured value during the observation period were calculated, and correlations with lemon intake and the number of steps walked were considered. As a result, it was suggested that daily lemon intake and walking are effective for high blood pressure because both showed significant negative correlation to systolic blood pressure Δ%. Conclusions. As a result of multiple linear regression analysis, it was possible that lemon ingestion is involved more greatly with the blood citric acid concentration Δ% and the number of steps with blood pressure Δ%, and it was surmised that the number of steps and lemon ingestion are related to blood pressure improvement by different action mechanisms. PMID:24818015

  8. Effect on Blood Pressure of Daily Lemon Ingestion and Walking

    Directory of Open Access Journals (Sweden)

    Yoji Kato

    2014-01-01

    Full Text Available Background. Recent studies suggest that the daily intake of lemon (Citrus limon has a good effect on health, but this has not been confirmed in humans. In our previous studies, it was observed that people who are conscious of their health performed more lemon intake and exercise. An analysis that took this into account was required. Methodology. For 101 middle-aged women in an island area in Hiroshima, Japan, a record of lemon ingestion efforts and the number of steps walked was carried out for five months. The change rates (Δ% of the physical measurements, blood test, blood pressure, and pulse wave measured value during the observation period were calculated, and correlations with lemon intake and the number of steps walked were considered. As a result, it was suggested that daily lemon intake and walking are effective for high blood pressure because both showed significant negative correlation to systolic blood pressure Δ%. Conclusions. As a result of multiple linear regression analysis, it was possible that lemon ingestion is involved more greatly with the blood citric acid concentration Δ% and the number of steps with blood pressure Δ%, and it was surmised that the number of steps and lemon ingestion are related to blood pressure improvement by different action mechanisms.

  9. Tevatron quench pressure measurement

    International Nuclear Information System (INIS)

    The upcoming lower temperature/higher energy upgrade to the Fermilab Tevatron accelerator has raised questions concerning peak pressures during magnet system quenches. An experiment was performed to measure the pressure versus time at various quench energies in several devices in the Tevatron. A smaller study also looked at the temperature and mass flow rate versus time. Data was captured in a PC based circular buffer. The buffer captured ten seconds of data at 250 Hz for up to eight channels. Quenches ranging from 400 GeV to 1000 GeV were investigated. Peak pressures of 1.24 MPa (180 psia) were measured at 1000 GeV. Peak pressure increased linearly with quench energy up to 950 GeV, where it flattened off. Likewise, the time to reach peak pressure decreased linearly until 900 GeV, where it flattened off at 280 ms. The process appears to become heat transfer limited at about 900 GeV. This results in reasonable peak quench pressures at the expense of the coil reaching higher peak temperatures (not measured). The existing cryostats and relieving systems in the Tevatron will be sufficient for the new low temperature upgrade

  10. Nocturnal variations in peripheral blood flow, systemic blood pressure, and heart rate in humans

    DEFF Research Database (Denmark)

    Sindrup, J H; Kastrup, J; Christensen, H;

    1991-01-01

    Subcutaneous adipose tissue blood flow rate, together with systemic arterial blood pressure and heart rate under ambulatory conditions, was measured in the lower legs of 15 normal human subjects for 12-20 h. The 133Xe-washout technique, portable CdTe(Cl) detectors, and a portable data storage uni...... than 0.0001). The synchronism of the nocturnal subcutaneous hyperemia and the decrease in systemic mean arterial blood pressure point to a common, possibly central nervous or humoral, eliciting mechanism.......Subcutaneous adipose tissue blood flow rate, together with systemic arterial blood pressure and heart rate under ambulatory conditions, was measured in the lower legs of 15 normal human subjects for 12-20 h. The 133Xe-washout technique, portable CdTe(Cl) detectors, and a portable data storage unit...

  11. Blood glucose and nocturnal blood pressure in African and caucasian men: the SABPA study

    OpenAIRE

    Lammertyn, Leandi; Schutte, Aletta Elisabeth; Schutte, Rudolph

    2011-01-01

    To investigate the relationship between nocturnal blood pressure and chronically elevated blood glucose to determine if these elevated blood glucose concentrations contribute to a non-dipping blood pressure, especially in high-risk groups such as Africans.

  12. 无创连续血压测量技术的研究进展%Research Progress in Non-Invasive Continuous Blood Pressure Measurement

    Institute of Scientific and Technical Information of China (English)

    魏安海; 尹军; 苌飞霸; 李姝颖; 周德强; 颜乐先

    2015-01-01

    This paper introduced the importance of non-invasive continuous blood pressure measurement. Moreover, the applanation tonometry method, vascular unloading technique, pulse wave velocity and characteristic parameter were analyzed emphatically. This paper also described the basic principles, the present research and the technical dififculties. Finally, the further development was prospected.%本文介绍了无创连续血压测量技术的重要性,重点分析了动脉张力法、容积补偿法、脉搏波速传导法和脉搏波特征参数测定法的原理、研究现状及难点,并根据研究现状对无创血压测量技术的发展提出了展望。

  13. Non-invasive automatic blood pressure measurement with equivalent auscultation%等效听诊法无创自动测量血压计的提出

    Institute of Scientific and Technical Information of China (English)

    解良勤; 刘彦刚

    2012-01-01

    介绍两种无创自动测量血压计—听诊法(又称柯氏音法)血压计和示波法(又称振荡法)血压计的工作原理,指出导致测量准确度不理想的原因。通过仔细观察传统听诊器法水银血压计测量血压的过程,发现伴随着柯氏音响的同时,水银柱会抖动。可根据水银柱第一次抖动和最后一次抖动确定收缩压和舒张压的现象,认真分析提出了准确度能大幅提高的等效听诊法无创自动测量血压计。指出在现有示波法无创自动测量血压计的基础上,实现等效听诊法无创自动测量血压计,不仅完全可行,而且非常简易。%In this paper, the authors described the existing two non-invasive automatic methods for blood pressure measurements of auscultation blood pressure measurement and oscillography blood pressure measurement and explored the cause for its inaccurate measurement. Through the observation of measuring the blood pressure with tradition mercury blood pressure measurement process, we found that mercury wobbled with sound. According to the first jitter sure systolic blood pressure and the last time jitter sure diastolic blood pressure, we concluded that we can greatly improve the accuracy of non-invasive automatic measure blood pressure measurement with equivalent auscultation. Based on the existing methods, non-invasive automatic measure blood pressure measurement with equivalent auscultation is simple and feasible.

  14. Verapamil buffering effect on the abrupt elevation in blood pressure, linkage with microcirculatory blood flow.

    Science.gov (United States)

    Gmitrov, J

    2008-01-01

    1 We studied the effects of verapamil on sudden elevation in blood pressure, microcirculation and arterial baroreflex sensitivity (BRS). 2 Thirty experiments (10 controls and 20 with verapamil) were performed in rabbits sedated using pentobarbital infusion (5 mg kg(-1) h(-1)). 3 BRS, mean femoral artery blood pressure (MAP), heart rate (HR) and ear lobe skin microcirculatory blood flow, estimated using microphotoelectric plethysmography (MPPG), were simultaneously measured during 30 min of verapamil infusion (20 mug kg(-1) min(-1)). BRS was assessed from HR and MAP responses to intravenous phenylephrine (Ph) and by power spectral analysis using transfer function (TF) from MAP to the HR (BRS(Ph,TF)). 4 Verapamil significantly increased microcirculatory blood flow, and decreased BRS(Ph,TF) and phenylephrine-induced abrupt elevation in MAP (MAP(AE)). 5 A significant inverse correlation was found between verapamil-induced changes in MAP(AE), BRS and in microcirculatory blood flow, measured before phenylephrine blood pressure ramps (DeltaMAP(AE) with DeltaBRS(TF), r = -0.47, P < 0.036; DeltaMAP(AE) with DeltaMPPG, r = -0.49, P < 0.025). 6 These results suggest involvement of the arterial baroreflex and vascular blood pressure-buffering mechanisms, their enhancement by verapamil, and thus a potential benefit of verapamil in cardiovascular conditions where patients present with abrupt high elevations in blood pressure. PMID:18598288

  15. Predictive role of the nighttime blood pressure

    DEFF Research Database (Denmark)

    Hansen, Tine W; Li, Yan; Boggia, José;

    2011-01-01

    Numerous studies addressed the predictive value of the nighttime blood pressure (BP) as captured by ambulatory monitoring. However, arbitrary cutoff limits in dichotomized analyses of continuous variables, data dredging across selected subgroups, extrapolation of cross-sectional studies to...... conclusive evidence proving that nondipping is a reversible risk factor, the option whether or not to restore the diurnal blood pressure profile to a normal pattern should be left to the clinical judgment of doctors and should be individualized for each patient. Current guidelines on the interpretation of...

  16. Managing Blood Pressure with a Heart-Healthy Diet

    Science.gov (United States)

    ... High Blood Pressure Tools & Resources Stroke More Managing Blood Pressure with a Heart-Healthy Diet Updated:Apr 8, ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  17. Techniques for estimating blood pressure variation using video images.

    Science.gov (United States)

    Sugita, Norihiro; Obara, Kazuma; Yoshizawa, Makoto; Abe, Makoto; Tanaka, Akira; Homma, Noriyasu

    2015-08-01

    It is important to know about a sudden blood pressure change that occurs in everyday life and may pose a danger to human health. However, monitoring the blood pressure variation in daily life is difficult because a bulky and expensive sensor is needed to measure the blood pressure continuously. In this study, a new non-contact method is proposed to estimate the blood pressure variation using video images. In this method, the pulse propagation time difference or instantaneous phase difference is calculated between two pulse waves obtained from different parts of a subject's body captured by a video camera. The forehead, left cheek, and right hand are selected as regions to obtain pulse waves. Both the pulse propagation time difference and instantaneous phase difference were calculated from the video images of 20 healthy subjects performing the Valsalva maneuver. These indices are considered to have a negative correlation with the blood pressure variation because they approximate the pulse transit time obtained from a photoplethysmograph. However, the experimental results showed that the correlation coefficients between the blood pressure and the proposed indices were approximately 0.6 for the pulse wave obtained from the right hand. This result is considered to be due to the difference in the transmission depth into the skin between the green and infrared light used as light sources for the video image and conventional photoplethysmogram, respectively. In addition, the difference in the innervation of the face and hand may be related to the results. PMID:26737225

  18. Blood pressure control among type 2 diabetics

    International Nuclear Information System (INIS)

    Objective was to assess blood pressure BP control in patients with diabetes mellitus type 2 DM type treated in primary health care. A cross-sectional study was conducted in primary health care at King Fahd Military Complex Hospital in Dhahran, Kingdom of Saudi Arabia, between August 2003 and February 2004, to assess blood control in type 2 diabetics. A sample of 403 medical records of type 2 diabetic patients was selected using systematic random sampling after ordering the medical record numbers. The data were collected through the pre-coded checklist. Hypertension was found in 57.8% of diabetic patients with no statistically significant difference between males and females. The mean age of diabetic patients was significantly highly in hypertensive than non-hypertensive p=0.001. The mean duration of hypertension was significantly higher in females p=0.02. There were only 14.2% of hypertensive diabetic patients in whom blood pressure was controlled. Poor control was significantly associated with obesity and a high rate of complications. Blood pressure control correlated positively and significantly with the age of patients and negatively with duration of diabetes and hypertension. The most commonly prescribed antihypertensive were angiotensin converting enzyme inhibitors in 29.3%, followed by angiotensin receptors blockers in 24.1%, and the least prescribed drug was thiazide diuretic. Blood pressure in diabetic patients needs to be given particular attention from all health care professionals, especially primary care family physicians, who should follow the new guideline for better control of blood pressure, and fewer complications. Patient's awareness should be increased, through continuous health education with different modalities. (author)

  19. High Blood Pressure and Children: What Parents Need to Know

    Science.gov (United States)

    ... and Blood Institute Alternate Language URL Español High Blood Pressure and Children: What Parents Need to Know Page Content Children can have high blood pressure. Did you know that children could have high ...

  20. Multiple-input nonlinear modelling of cerebral haemodynamics using spontaneous arterial blood pressure, end-tidal CO2 and heart rate measurements.

    Science.gov (United States)

    Marmarelis, V Z; Mitsis, G D; Shin, D C; Zhang, R

    2016-05-13

    In order to examine the effect of changes in heart rate (HR) upon cerebral perfusion and autoregulation, we include the HR signal recorded from 18 control subjects as a third input in a two-input model of cerebral haemodynamics that has been used previously to quantify the dynamic effects of changes in arterial blood pressure and end-tidal CO2upon cerebral blood flow velocity (CBFV) measured at the middle cerebral arteries via transcranial Doppler ultrasound. It is shown that the inclusion of HR as a third input reduces the output prediction error in a statistically significant manner, which implies that there is a functional connection between HR changes and CBFV. The inclusion of nonlinearities in the model causes further statistically significant reduction of the output prediction error. To achieve this task, we employ the concept of principal dynamic modes (PDMs) that yields dynamic nonlinear models of multi-input systems using relatively short data records. The obtained PDMs suggest model-driven quantitative hypotheses for the role of sympathetic and parasympathetic activity (corresponding to distinct PDMs) in the underlying physiological mechanisms by virtue of their relative contributions to the model output. These relative PDM contributions are subject-specific and, therefore, may be used to assess personalized characteristics for diagnostic purposes. PMID:27044989

  1. On preventive blood pressure self-monitoring at home

    DEFF Research Database (Denmark)

    Verdezoto, Nervo; Grönvall, Erik

    2015-01-01

    -called Quantified Self). In this article, we explore socio-technical complexities that may occur when introducing preventive health-measurement technologies into older adults’ daily routines and everyday lives. In particular, the original study investigated blood pressure (BP) measurement in non-clinical settings...

  2. Ethnic Variations in Blood Pressure and Hypertension

    NARCIS (Netherlands)

    C.O. Agyemang (Charles)

    2005-01-01

    textabstractThe objective of the study was to review published evidence on whether blood pressure levels and the prevalence of hypertension are higher or lower in South Asian adults living in the UK as compared to white populations. A systematic literature review was carried out using MEDLINE 196

  3. Teaming Up Against High Blood Pressure

    Centers for Disease Control (CDC) Podcasts

    2012-09-04

    This podcast is based on the September 2012 CDC Vital Signs report. A team-based approach by patients, health care systems, and health care providers is one of the best ways to treat uncontrolled high blood pressure.  Created: 9/4/2012 by Centers for Disease Control and Prevention (CDC).   Date Released: 9/4/2012.

  4. Familial Aggregation and Childhood Blood Pressure

    NARCIS (Netherlands)

    Wang, Xiaoling; Xu, Xiaojing; Su, Shaoyong; Snieder, Harold

    2015-01-01

    There is growing concern about elevated blood pressure (BP) in children. The evidence for familial aggregation of childhood BP is substantial. Twin studies have shown that a large part of the familial aggregation of childhood BP is due to genes. The first part of this review provides the latest prog

  5. Accurate blood pressure recording: Is it difficult?

    Directory of Open Access Journals (Sweden)

    Bhalla A

    2005-11-01

    Full Text Available BACKGROUND: Blood pressure (BP measurement is a routine procedure but errors are frequently committed during BP recording. AIMS AND SETTINGS: The aim of the study was to look at the prevalent practices in the institute regarding BP recording. The study was conducted in the Medicine Department at Government Medical College, Chandigarh, a teaching institute for MBBS students. METHODS: A prospective, observational study was performed amongst the 80 doctors in a tertiary care hospital. All of them were observed by a single observer during the act of BP recording. The observer was well versed with the guidelines issued by British Hypertension Society (BHS and the deviations from the standard set of guidelines issued by BHS were noted. The errors were defined as deviations from these guidelines. STATISTICAL METHODS: The results were recorded as percentage of doctors committing these errors. RESULTS: In our study, 90% used mercury type sphygmomanometer. Zero error of the apparatus, hand dominance was not noted by any one. Every one used the standard BP cuff for recording BP. 70% of them did not let the patient rest before recording BP. 80% did not remove the clothing from the arm. None of them recorded BP in both arms. In out patient setting, 80% recorded blood pressure in sitting position and 14% in supine position. In all the patients where BP was recorded in sitting position BP apparatus was below the level of heart and 20% did not have their arm supported. 60% did not use palpatory method for noticing systolic BP and 70% did not raise pressure 30-40 mm Hg above the systolic level before checking the BP by auscultation. 80% lowered the BP at a rate of more than 2 mm/s and 60% rounded off the BP to nearest 5-10 mm Hg. 70% recorded BP only once and 90% of the rest re inflated the cuff without completely deflating and allowing rest before a second reading was obtained. CONCLUSION: The practice of recording BP in our hospital varies from the standard

  6. Blood pressure and control of cardiovascular risk

    Directory of Open Access Journals (Sweden)

    Judith A Whitworth

    2005-10-01

    Full Text Available Judith A WhitworthJohn Curtin School of Medical Research, Australian National University, Canberra, ACT, AustraliaAbstract: Two key early 20th century notions, the first the primacy of diastolic pressure in determining risk, and the second that hypertension is a discrete disorder, have proved to be incorrect. We now recognize the primacy of systolic pressure as a risk factor for cardiovascular disease and that hypertension is an arbitrary definition. In the early 21st century, we are moving away from a dichotomous approach to risk classification, and away from notions of hypertension and normotension towards an appreciation that blood pressure-related risk is continuous. In parallel, there has been a paradigm shift from a single risk factor approach to comprehensive cardiovascular disease risk prevention. Accordingly, prevention of cardiovascular disease requires a focus on lowering of blood pressure and modification of associated risk factors rather than simply treatment of hypertension. This emphasis is reflected in the World Health Organization (WHO – International Society of Hypertension (ISH 2003 statement on management of hypertension.Keywords: blood pressure, hypertension, cardiovascular risk, treatment

  7. Epidural blood patch for refractory low CSF pressure headache

    DEFF Research Database (Denmark)

    Madsen, Søren Aalbæk; Fomsgaard, Jonna Storm; Jensen, Rigmor

    2011-01-01

    of non-invasive/conservative measures and invasive measures with epidural blood patch providing the cornerstone of the invasive measures. In the present pilot study we therefore aimed to evaluate the treatment efficacy of epidural blood patch (EBP) in treatment-refractory low-pressure headache. Our......Once believed an exceedingly rare disorder, recent evidence suggests that low cerebrospinal fluid (CSF) pressure headache has to be considered an important cause of new daily persistent headaches, particularly among young and middle-aged individuals. Treatment of low CSF pressure headache consists...... reduction in frequency. An increase in days with use of medication was found. Increased awareness of low CSF pressure headache is emphasized and a controlled larger randomized study is needed to confirm the results. However the present results, allows us to conclude that EBP in treatment-refractory low CSF...

  8. Instrumentação na medida da pressão arterial: aspectos históricos, conceituais e fontes de erro Blood pressure measurement instrumentation: historical aspects, concepts and source of errors

    Directory of Open Access Journals (Sweden)

    Thelma Leite de Araujo

    1998-04-01

    Full Text Available A medida indireta da pressão arterial é um dos procedimentos mais executados pelos enfermeiros de todo o mundo, segundo o Conselho Internacional de Enfermeiras. 0 trabalho discute os principais aspectos polêmicos do instrumental utilizado para a medida indireta da pressão arterial que são causa significativa de erros de medida, a partir da análise da literatura e das recomendações da American Heart Association.According to the International Council of Nurses the measurement of blood pressure is the procedure most performed by nurses in all the world. The aim of this study is to analyse the polemical aspects of instruments used in blood pressure measurement. Considering the analyses of the literature and the American Heart Association Recommendations, the main source of errors when measuring blood pressure are discussed.

  9. Body mass index relates to blood pressure among adults

    Directory of Open Access Journals (Sweden)

    Suman Dua

    2014-01-01

    Full Text Available Background: The blood pressure and anthropometric measurements are important for evaluating the health of children, adolescents as well as adults. Aim: The aim is to study the blood pressure and body dimensions and to find out the prevalence of overweight/obesity and hypertension among adults. Materials and Methods: A cross-sectional study was conducted of all the people belonging to the Punjabi community, residing in Roshanara area and Jaina building in Delhi, for the past 20 years and aged 18-50 years. The men were engaged in transport business and women were mainly housewives. Results: Mean values of all the measurements, that is, height, weight, upper arm circumference, pulse rate, systolic blood pressure (SBP, and diastolic blood pressure (DBP were higher among males as compared with females, except skinfold thicknesses. Body mass index (BMI and fat percentage was found to be higher among females as compared with males. There was a significant positive correlation between BMI, fat percentage, and blood pressure both SBP as well as DBP. Odds ratio showed that overweight/obese subjects were more likely to have hypertension than those with normal BMI. Conclusion: Prevalence of prehypertension among overweight/obese suggested an early clinical detection of prehypertension and intervention including life style modification, particularly weight management.

  10. Pressure passive cerebral blood flow and breakdown of the blood-brain barrier in experimental fetal asphyxia

    DEFF Research Database (Denmark)

    Lou, H C; Lassen, N A; Tweed, W A;

    1979-01-01

    mean arterial blood pressure in the fetuses by blood withdrawal or infusion in this state, CBF was measured at different perfusion pressures (mean arterial blood pressure (MABP) minus central venous pressure (CVP)). A passive flow/pressure relationship--loss of autoregulation--was found, with hyperemia...... reaching CBF values up to 6 times normal at normal MABP of about 60 to 70 mmHg, and severe ischemia reaching CBF values close to zero in large cortical areas at MABP of 30 mmHg. CVP remained essentially unchanged at 10--15 mmHg. The severe and prolonged asphyxia rendered the blood-brain barrier leaky to...

  11. Association of Socioeconomic Status with Anthropometric Measures and Blood Pressure in a Representative Sample of Iranian Children and Adoles-cents: The CASPIAN-IV Study

    Directory of Open Access Journals (Sweden)

    Ramin HESHMAT

    2015-10-01

    Full Text Available Background: The aim of this study was to evaluate the association of Socioeconomic Status (SES with anthropometric measures and BP in Iranian children and adolescents.Methods: This nationwide study was conducted in 2011-2012 among 14,880 students, aged 6-18 years, selected by multistage, cluster-sampling method from rural and urban areas of 30 provinces of Iran. Anthropometric indexes and BP were measured by standard protocols and with calibrated instruments. SES was estimated based on family assets and parents’ job and education using principle component analysis method. SES was considered as “low”, “intermediate” and “high” in the statistical analysis.Results: Overall, 13486 children and adolescents out of 14,880 invited students (response rate 90.6% participated in this study. They consisted of 50.8% boys, 75.6% urban residents, with a mean age of 12.47 ±3.36 years. The prevalence of overweight, obesity and abdominal obesity and also mean of all anthropometric measures increased linearly with increasing SES. Inversely, underweight decreased linearly with increasing SES. Association of BP measures with SES was not statistically significant. After adjustment for potential confounders, association of anthropometric measures and BP with SES did not change significantly.Conclusion: We found that obesity, overweight and abdominal obesity was prevalent in high SES group and underweight in low SES group. Our findings serve as confirmatory evidence that contrary to developed countries, in developing countries childhood obesity is more prevalent in families with higher SES. Keywords: Anthropometric measures, Blood pressure, Socio-economic status, Children and adolescents, Iran

  12. Effects on blood pressure in patients with refractory angina pectoris after enhanced external counterpulsation

    DEFF Research Database (Denmark)

    Bondesson, Susanne; Pettersson, Thomas; Ohlsson, Børje Ola Mattias;

    2010-01-01

    OBJECTIVE: Enhanced external counterpulsation (EECP) is a non-invasive technique that has been shown to reduce the frequency and severity of angina pectoris. Little is known how EECP affects the blood pressure. METHODS: 153 patients with refractory angina were treated with either EECP or retained...... on their pharmacological treatment (reference group). Systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial blood pressure (MAP) and heart rate were measured pre- and post-treatment and at 12 months follow-up. RESULTS: EECP treatment altered the blood pressure in patients with...... refractory angina pectoris. A decrease in the blood pressure was more common in the EECP group compared with the reference group. In the reference group, an increase in the blood pressure was more common. A correlation between a decrease in blood pressure after EECP treatment and a higher baseline MAP, SBP...

  13. Cuffless differential blood pressure estimation using smart phones.

    Science.gov (United States)

    Chandrasekaran, Vikram; Dantu, Ram; Jonnada, Srikanth; Thiyagaraja, Shanti; Subbu, Kalyan Pathapati

    2013-04-01

    Smart phones today have become increasingly popular with the general public for their diverse functionalities such as navigation, social networking, and multimedia facilities. These phones are equipped with high-end processors, high-resolution cameras, and built-in sensors such as accelerometer, orientation-sensor, and light-sensor. According to comScore survey, 26.2% of U.S. adults use smart phones in their daily lives. Motivated by this statistic and the diverse capability of smart phones, we focus on utilizing them for biomedical applications. We present a new application of the smart phone with its built-in camera and microphone replacing the traditional stethoscope and cuff-based measurement technique, to quantify vital signs such as heart rate and blood pressure. We propose two differential blood pressure estimating techniques using the heartbeat and pulse data. The first method uses two smart phones whereas the second method replaces one of the phones with a customized external microphone. We estimate the systolic and diastolic pressure in the two techniques by computing the pulse pressure and the stroke volume from the data recorded. By comparing the estimated blood pressure values with those measured using a commercial blood pressure meter, we obtained encouraging results of 95-100% accuracy. PMID:22868529

  14. Blood pressure standards for Saudi children and adolescents

    International Nuclear Information System (INIS)

    Blood pressure levels may vary in children because of genetic, ethnic and socioeconomic factors. To date, there have been no large national studies in Saudi Arabia on blood pressure in children. Therefore, we sought to establish representative blood pressure reference centiles for Saudi Arabian children and adolescents. We selected a sample of children and adolescents aged from birth to 18 years by multi-stage probability sampling of the Saudi population. The selected sample represented Saudi children from the whole country. Data were collected through a house-to-house survey of all selected households in all 13 regions in the country. Data were analyzed to study the distribution pattern of systolic (SBP) and diastolic blood pressure (DBP) and to develop reference values. The 90th percentile of SBP and DBP values for each age were compared with values from a Turkish and an American study. A total of 16 226 Saudi children and adolescents from birth to 18 years were studied. Blood pressure rose steadily with age in both boys and girls. The average annual increase in SBP was 1.66 mm Hg for boys and1.44 mm Hg for girls. The average annual increase in DBP was 0.83 mm Hg for boys and 0.77 mm Hg for girls. DBP rose sharply in boys at the age of 18 years. Values for the 90th percentile of both SBP and DBP varied in Saudi children from their Turkish and American counterparts for all age groups. Blood pressure values in this study differed from those from other studies in developing countries and in the United States, indicating that comparison across studies is difficult and from that every population should use their own normal standards to define measured blood pressure levels in children. (author)

  15. 21 CFR 870.1100 - Blood pressure alarm.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Blood pressure alarm. 870.1100 Section 870.1100...) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1100 Blood pressure alarm. (a) Identification. A blood pressure alarm is a device that accepts the signal from a blood...

  16. Non-invasive and quantitative evaluation of peripheral vascular resistances in rats by combined NMR measurements of perfusion and blood pressure using ASL and dynamic angiography.

    Science.gov (United States)

    Ménard, Jacques C; Giacomini, Eric; Baligand, Céline; Fromes, Yves; Carlier, Pierre G

    2010-02-01

    The in vivo determination of peripheral vascular resistances (VR) is crucial for the assessment of arteriolar function. It requires simultaneous determination of organ perfusion (F) and arterial blood pressure (BP). A fully non-invasive method was developed to measure systolic and diastolic BP in the caudal artery of rats based on dynamic NMR angiography. A good agreement was found between the NMR approach and the gold standard techniques (linear regression slope = 0.98, R(2) = 0.96). This method and the ASL-MRI measurement of skeletal muscle perfusion were combined into one single NMR experiment to quantitatively evaluate the local vascular resistances in the calf muscle of anaesthetized rats, in vivo and non-invasively 1) at rest: VR = 7.0 +/- 1.0 mmHg x min 100 g x ml(-1), F = 13 +/- 3 ml min(-1) x 100 g(-1) and mean BP (MBP) = 88 +/- 10 mmHg; 2) under vasodilator challenge (milrinone): VR = 3.7 +/- 1.1 mmHg min x 100 g ml(-1), F = 21 +/- 4 ml min(-1) x 100 g(-1) and MBP = 75 +/- 14 mmHg; 3) under vasopressor challenge (norepinephrine): VR = 9.8 +/- 1.2 mmHg min 100 g ml(-1), F = 14 +/- 3 ml min(-1) x 100 g(-1) and MBP = 137 +/- 2 mmHg. PMID:19795372

  17. Effect of Classical Music on Reducing Blood Pressure in Children

    OpenAIRE

    Saing, Saloma Klementina; Rina, Oke; Ramayati, Rafita; Rusdidjas

    2009-01-01

    Background High blood pre ssure remains a public health problem. High blood pressure in children and adolescent is a major risk for cardiovascular disease in adulthood which can cause high morbidity and mortality. Listening to the classical music can be used as an alternative in reducing high blood pressure. Objective To investigate the effect of classical music in reducing blood pressure in children with high normal blood pressure and or hypertension. Methods Eighty eight students of S...

  18. Measurement of Strong Shock Pressure

    OpenAIRE

    Hajime Takada; Daisuke Fujimaki; Takao Tsuboi

    1997-01-01

    This paper deals with measurement of a strong shock pressure like an imploding detonation of over 1 GPa which cannot be measured directly with currently available commercial pressure transducers. After the transfer functions of three kinds of materials were measured using a shock tube, Teflon was selected as a shock absorber. As an example of pressure beyond the limit of the pressure transducer, we tried to measure pressure at the center of an imploding detonation. From this measurement, we c...

  19. Diurnal changes of blood pressure values (24 h blood pressures in women with polycystic ovary syndrome

    Directory of Open Access Journals (Sweden)

    Barbara Grzechocińska

    2011-06-01

    Full Text Available Background: More attention is being paid lately to polycystic ovary syndrome (PCOS not only in the aspect of fertility but also according to long-term metabolic and cardiovascular abnormalities. Observations of women with PCOS show that the occurrence of blood hypertension is more frequent after the menopause. There are few articles concerning the predictable symptoms of blood hypertension. It seems that twenty-four hour blood pressure monitoring and assessment of changes of diurnal rhythm could be useful in this group of patients.Aim of the study: The purpose of this study was to assess diurnal changes of blood pressure in women with polycystic ovary syndrome.Material and methods: 26 women with PCOS diagnosed according to Rotterdam consensus criteria and Androgen Excess Society (AES criteria were included in our study. The mean age of the examined women was 29.5 years and the mean BMI (body mass index was 24.7 kg/m2. The control group consisted of 12 age-matched women, without PCOS. Twenty-four hour Holter monitoring of ambulatory blood pressure was performed during normal daily activity in all patients. Halberg’s cosinor method was used to analyse daily biorhythm.Results: Results show the diurnal changes of systolic blood pressure in the preclinical phase in 30% and diastolic in 15% of PCOS women. In this group no physiological decrease of blood pressure at night time was observed.

  20. Gastric mucosal blood flow measurement

    International Nuclear Information System (INIS)

    Pertechnetate clearance (C/sub Tc/) by the stomach before and after betazole stimulation was compared to regional measurements of gastric blood flow utilizing nuclide (Chromium-51 and Cerium-141)-labeled microspheres in five piglets. Pertechnetate clearance closely correlated (correlation coefficient 0.926) with mucosal blood flow in the gastric corpus measured by the microsphere technique. Betazole increased blood flow in the corpus region by 100 percent but did not alter this relationship. Except in one experiment, microsphere blood flow valves in the antrum and fundus were unchanged by betazole and did not significantly correlate with pertechnetate clearance. Pertechnetate clearance appears to be a reliable method of determining gastric mucosal blood flow in experimental animals and may be considered as a noninvasive method for measuring such flow in humans. (U.S.)

  1. [Blood pressure control in eldery hypertension].

    Science.gov (United States)

    Shimamoto, Kazuaki

    2006-01-01

    Case of diabetes mellitus associated with essential hypertension are mostly type 2 diabetes mellitus(NIDDM) in elderly patients. In the JNC VI and JSH 2004, it is recommended that the therapeutic target blood pressure level should be lower then 130/80 mmHg in hypertension complicated with diabetes mellitus, and this target has recently obtained wide acceptance. On the other hand, the target blood pressure in elderly is recommended below 140/90 mmHg. Accordingly, diabetes mellitus in elderly hypertensives should be treated similarly as in the young and middle-aged. Because ACE inhibitors/ARBs or Ca blockers increase insulin sensitivity, these drugs should be used as the first choice in cases of elderly hypertensive patients complicated with diabetes mellitus. PMID:16408451

  2. Dirty Air, High Blood Pressure Linked

    Institute of Scientific and Technical Information of China (English)

    应树道

    2001-01-01

    贵刊去年第6期曾刊登一短文,题目是:盐,迫升血压之元凶。读了该文,我开始严格控制每日的食盐摄入量,再附以药物治疗,血压果然趋于平稳。近日上网,遇一奇文,意思是人的血压与空气污染状况有涉!根据对2600个成年人的调查,得出了这样的结论:Pollution may cause changes in the part of the nervous system that controls blood pressure.文章又同时说明:Exactly how pollution might cause blood pressure to climb remains unclear.人体之奥妙由此可见一斑。

  3. [Reducing blood pressure with Dipyron (novaminsulfone sodium)].

    Science.gov (United States)

    Zoppi, M; Hoigné, R; Keller, M F; Streit, F; Hess, T

    1983-11-26

    A fall in systolic blood pressure without other symptoms of anaphylactic shock has been described following the administration of drugs containing dipyrone. This adverse reaction was first observed in 4 patients by the same team in 1972-1973. Ten further cases with a fall in systolic blood pressure by at least 20 mm Hg occurring within minutes to 6 hours after intravenous administration of dipyrone are presented in this paper. In each of them this adverse reaction was considered to be probable or even definite. During the years 1976-1981 drug exposure was registered for all 15 678 patients of the two medical divisions of Comprehensive Hospital Drug Monitoring Berne. This adverse reaction was found in 7, representing 0.34% of the 2053 patients who received intravenous treatment with a dipyrone preparation. PMID:6658424

  4. 基于容积脉搏波的无创连续血压测量系统%A Non-invasive Continuous Blood Pressure Measurement System Based on Plethysmographic Pulse Wave

    Institute of Scientific and Technical Information of China (English)

    梁永波; 陈真诚; 朱健铭; 殷世民

    2013-01-01

    Objective To develop a non-invasive continuous blood pressure measurement system without the cuff based on plethysmographic pulse wave. Methods A blood pressure estimation equation was established by the stepwise regression analysis on blood pressure and pulse wave transit time which was extracted from a single circle of plethysmographic pulse wave, and then the non-invasive continuous blood pressure measurement was realized. Results Compared blood pressure value with detection by the system and Yu-Yue brand mercury sphygmomanometer from various populations, the results indicated that the two methods exhibit good coherence , and the measurement error is better than the Association for the Advancement of Medical Instrumentation (AAMI) recommendation standard. Conclusion Compared with traditional blood pressure measurement method , the non-invasive continuous blood pressure measurement method is more convenient. It can measure blood pressure continuously without cuff and invasion, and may have promising application in the future.%目的 设计一种基于容积脉搏波的无袖套连续血压测量系统.方法 从单一容积脉搏波中提取脉搏波传导时间,经逐步回归分析与血压建立血压估算方程,实现无创连续血压测量.结果 通过对不同人群血压检测,并与鱼跃牌水银血压计进行对比,结果表明该方法和传统方法具有较好的测试一致性,测量误差优于美国医疗仪器促进协会(AAMI)推荐标准.结论 该方法同传统血压测量方法相比,测量方便,可彻底摆脱缚带,并能实现无创连续测量,具有更广阔的应用前景.

  5. What Are the Signs, Symptoms, and Complications of High Blood Pressure?

    Science.gov (United States)

    ... What Are the Signs, Symptoms, and Complications of High Blood Pressure? Because diagnosis is based on blood pressure readings, ... damaged from chronic high blood pressure. Complications of High Blood Pressure When blood pressure stays high over time, it ...

  6. Is aerobic workload positively related to ambulatory blood pressure?

    DEFF Research Database (Denmark)

    Korshøj, Mette; Clays, Els; Lidegaard, Mark;

    2016-01-01

    PURPOSE: Cardiovascular disease is prevalent among workers with high levels of occupational physical activity. The increased risk may be due to a high relative aerobic workload, possibly leading to increased blood pressure. However, studies investigating the relation between relative aerobic...... workload and ambulatory blood pressure (ABP) are lacking. The aim was to explore the relationship between objectively measured relative aerobic workload and ABP. METHODS: A total of 116 cleaners aged 18-65 years were included after informed consent was obtained. A portable device (Spacelabs 90217) was...

  7. Blood pressure: trends, determinants and consequences.

    NARCIS (Netherlands)

    Leer, van E.

    1995-01-01

    Trends in blood pressure, prevalence and treatment of hypertension were studied in 30,000 men and women aged 37-43 years during the period 1974-1980, in 80,000 men aged 33-37 years during the period 1981-1986 and 36,000 in men and women aged 20-59 years during the period 1987-1991. Between 1974 and

  8. Effect of lemon juice on blood pressure

    OpenAIRE

    SARI, Aysel; SELİM, Nevzat; Melda DİLEK; AYDOĞDU, Turkan; ADIBELLİ, Zelal; BÜYÜKKAYA, Piltan; Akpolat, Tekin

    2012-01-01

    Lemon juice has commonly been used by hypertensive patients in order to lower blood pressure (BP) acutely when BP is raised or as an alternative/complementary therapy for expectation of chronic improvement. Grapefruit, a citrus fruit like lemon, causes clinically significant interactions with a variety of drugs including calcium antagonists. The aims of this study were to investigate acute and chronic effects of lemon juice on BP among hypertensive patients. Ninty-eight patients were included...

  9. Blood pressure changes resulting from aortography.

    OpenAIRE

    Snowdon, S L; Whitehouse, G. H.

    1981-01-01

    Patients requiring aortography frequently suffer from generalized arteriosclerosis. Uncontrolled hypotension is therefore clearly undesirable, especially if associated with myocardial depression. Significant hypotension was observed following the use of conventional ionic contrast media, Urografin 370 and Cardioconray, and occurred following every injection in this study. Metrizamide, a non-ionic contrast medium, was found to be associated with a smaller fall in blood pressure of a shorter du...

  10. Neuro-endocrine regulation of blood pressure

    OpenAIRE

    Sandeep Chopra; Chris Baby; Jubbin Jagan Jacob

    2011-01-01

    As our understanding of the underlying aetiology of hypertension is far from adequate, over 90% of patients with hypertension receive a diagnosis of essential hypertension. This non-specific diagnosis leads to suboptimal therapeutics and a major problem with non-compliance. Understanding the normal control of blood pressure (BP) is, hence, important for a better understanding of the disease.This review attempts to unravel the present understanding of BP control. The local mechanisms of BP con...

  11. Familial Aggregation and Childhood Blood Pressure

    OpenAIRE

    Wang, Xiaoling; Xu, Xiaojing; Su, Shaoyong; Snieder, Harold

    2015-01-01

    There is growing concern about elevated blood pressure (BP) in children. The evidence for familial aggregation of childhood BP is substantial. Twin studies have shown that a large part of the familial aggregation of childhood BP is due to genes. The first part of this review provides the latest progress in gene finding for childhood BP, focusing on the combined effects of multiple loci identified from the genome-wide association studies on adult BP. We further review the evidence on the contr...

  12. Brachial versus central blood pressure and vascular stiffness

    DEFF Research Database (Denmark)

    Rasmussen, Susanne; Hansen, Tine; Frimodt-Møller, Marie

    2010-01-01

    Central blood pressure (BP) estimates the true load imposed on the left ventricle to a higher degree than does brachial BP. Increased aortic pulse wave velocity (aPWV) and central BP are risk markers for cardiovascular disease. Both can be measured by simple and noninvasive methods. Guidelines...

  13. The effect of nutrition on blood pressure.

    Science.gov (United States)

    Savica, Vincenzo; Bellinghieri, Guido; Kopple, Joel D

    2010-08-21

    The incidence and severity of hypertension are affected by nutritional status and intake of many nutrients. Excessive energy intake and obesity are major causes of hypertension. Obesity is associated with increased activity of the renin-angiotensin-aldosterone and sympathetic nervous systems, possibly other mineralcorticoid activity, insulin resistance, salt-sensitive hypertension and excess salt intake, and reduced kidney function. High sodium chloride intake strongly predisposes to hypertension. Increased alcohol consumption may acutely elevate blood pressure. High intakes of potassium, polyunsaturated fatty acids, and protein, along with exercise and possibly vitamin D, may reduce blood pressure. Less-conclusive studies suggest that amino acids, tea, green coffee bean extract, dark chocolate, and foods high in nitrates may reduce blood pressure. Short-term studies indicate that specialized diets may prevent or ameliorate mild hypertension; most notable are the Dietary Approaches to Stop Hypertension (DASH) diet, which is high in fruits, vegetables, and low-fat dairy products, and the DASH low-sodium diet. Long-term compliance to these diets remains a major concern. PMID:20645853

  14. Simultaneously measured inter-arm and inter-leg systolic blood pressure differences and cardiovascular risk stratification: a systemic review and meta-analysis.

    Science.gov (United States)

    Singh, Sukhchain; Sethi, Ankur; Singh, Mukesh; Khosla, Kavia; Grewal, Navsheen; Khosla, Sandeep

    2015-08-01

    Association of inter-arm systolic blood pressure difference (IASBPD) with cardiovascular (CV) morbidity and mortality remains controversial. We aimed to thoroughly examine all available evidence on inter-limb blood pressure (BP) difference and its association with CV risk and outcomes. We searched PubMed, EMBASE, CINAHL, Cochrane library, and Ovid for studies reporting bilateral simultaneous BP measurements in arms or legs and risk of peripheral arterial disease (PAD), coronary artery disease, cerebrovascular disease, subclavian stenosis, or mortality. Random-effect meta-analysis was performed to compare effect estimates. Twenty-seven studies met inclusion criteria, but only 17 studies (18 cohorts) were suitable for analysis. IASBPD of 10 mmHg or more was associated with PAD (risk ratios, 2.22; 1.41-3.5; P = .0006; sensitivity 16.6%; 6.7-35.4; specificity 91.9%; 83.1-96.3; 8 cohorts; 4774 subjects), left ventricular mass index (standardized mean difference 0.21; 0.03-0.39; P = .02; 2 cohort; 1604 subjects), and brachial-ankle pulse wave velocity (PWV) (one cohort). Association of PAD remained significant at cutoff of 15 mmHg (risk ratios, 1.91; 1.28-2.84; P = .001; 5 cohorts; 1914 subjects). We could not find statistically significant direct association of coronary artery disease, cerebrovascular disease, CV, and all-cause mortality in subjects with IASBPD of 10 mmHg or more, 15 mmHg or more, and inter-leg systolic BP difference of 15 mmHg or more. Inter-leg BP difference of 15 mmHg or more was strong predictor of PAD (P = .0001) and brachial-ankle PWV (P = .0001). Two invasive studies showed association of IASBPD and subclavian stenosis (estimates could not be combined). In conclusion, inter-arm and leg BP differences are strong predictors of PAD. IASBPD may be associated with subclavian stenosis, high left ventricular mass effect, and higher brachial-ankle PWVs. Inter-leg BP difference may also be associated with high left ventricular mass effect and higher

  15. Precautions for breast cancer-related lymphoedema: risk from air travel, ipsilateral arm blood pressure measurements, skin puncture, extreme temperatures, and cellulitis.

    Science.gov (United States)

    Asdourian, Maria S; Skolny, Melissa N; Brunelle, Cheryl; Seward, Cara E; Salama, Laura; Taghian, Alphonse G

    2016-09-01

    Precautionary recommendations conveyed to survivors of cancer by health-care practitioners to reduce the risk of breast cancer-related lymphoedema are indispensable aspects of clinical care, yet remain unsubstantiated by high-level scientific evidence. By reviewing the literature, we identified 31 original research articles that examined whether lifestyle-associated risk factors (air travel, ipsilateral arm blood pressure measurements, skin puncture, extreme temperatures, and skin infections-eg, cellulitis) increase the risk of breast cancer-related lymphoedema. Among the few studies that lend support to precautionary guidelines, most provide low-level (levels 3-5) or inconclusive evidence of an association between lymphoedema and these risk factors, and only four level 2 studies show a significant association. Skin infections and previous infection or inflammation on the ipsilateral arm were among the most clearly defined and well established risk factors for lymphoedema. The paucity of high-level evidence and the conflicting nature of the existing literature make it difficult to establish definitive predictive factors for breast cancer-related lymphoedema, which could be a considerable source of patient distress and anxiety. Along with further research into these risk factors, continued discussion regarding modification of the guidelines and adoption of a risk-adjusted approach is needed. PMID:27599144

  16. Elevated blood pressure and obesity in young adults of hypertensive parent versus normotensive parent

    OpenAIRE

    Ramya. K3; Mukundan A; Lokesh Maran A

    2016-01-01

    Background: Hypertension has become one of the leading cause of morbidity and mortality throughout the world. Family history of hypertension increases the risk of occurrence of elevated blood pressure and hypertension in their offspring. Simple measures like blood pressure measurements and anthropometric measures can used easily for screening them. So, this study was aimed to assess the association of elevated blood pressure and obesity in young adults of one parent hypertensive versus normot...

  17. Classification of High Blood Pressure Persons Vs Normal Blood Pressure Persons Using Voice Analysis

    Directory of Open Access Journals (Sweden)

    Saloni

    2013-11-01

    Full Text Available The human voice is remarkable, complex and delicate. All parts of the body play some role in voice production and may be responsible for voice dysfunction. The larynx contains muscles that are surrounded by blood vessels connected to circulatory system. The pressure of blood in these vessels should be related with dynamic variation of vocal cord parameters. These parameters are directly related with acoustic properties of speech. Acoustic voice analysis can be used to characterize the pathological voices. This paper presents the classification of high blood pressure and normal with the aid of voice signal recorded from the patients. Various features have been extracted from the voice signal of healthy persons and persons suffering from high blood pressure. Simulation results show differences in the parameter values of healthy and pathological persons. Then an optimum feature vector is prepared and kmean classification algorithm was implemented for data classification. The 79% classification efficiency was obtained.

  18. Ambulatory Blood Pressure Monitoring in Clinical Practice: A Review

    Science.gov (United States)

    Viera, Anthony J.; Shimbo, Daichi

    2016-01-01

    Ambulatory blood pressure monitoring offers the ability to collect blood pressure readings several times an hour across a 24-hour period. Ambulatory blood pressure monitoring facilitates the identification of white-coat hypertension, the phenomenon whereby certain individuals who are not on antihypertensive medication show elevated blood pressure in a clinical setting but show non-elevated blood pressure averages when assessed by ambulatory blood pressure monitoring. Additionally, readings can be segmented into time windows of particular interest, e.g., mean daytime and nighttime values. During sleep, blood pressure typically decreases, or dips, such that mean sleep blood pressure is lower than mean awake blood pressure. A non-dipping pattern and nocturnal hypertension are strongly associated with increased cardiovascular morbidity and mortality. Approximately 70% of individuals dip ≥10% at night, while 30% have non-dipping patterns, when blood pressure remains similar to daytime average, or occasionally rises above daytime average. The various blood pressure categorizations afforded by ambulatory blood pressure monitoring are valuable for clinical management of high blood pressure since they increase accuracy for diagnosis and the prediction of cardiovascular risk. PMID:25107387

  19. Fat induced hypertension in rabbits. Effects of dietary fibre on blood pressure and blood lipid concentration.

    Science.gov (United States)

    Burstyn, P G; Husbands, D R

    1980-04-01

    Rabbits were fed diets containing 200 g.kg-1 coconut oil, palm oil, or safflower oil. Some of the diets also contained 200 g.kg-1 cellulose. The blood pressure was measured daily by a non-invasive technique for the 2 month duration of the experiment. Blood samples were drawn after an overnight fast at intervals during the experiment and analysed for lipids. Blood pressure was always increased by a fat-enriched diet. This effect was diminished and delayed by adding cellulose to the diets, though cellulose itself had no effect on the blood pressure in the absence of fat. There was a modest negative correlation between fasting serum triglyceride concentration and the blood pressure in animals fed fat enriched diets without added cellulose, but not in animals fed diets containing both fat and cellulose. These results coupled with those of Wright, Burstyn and Gibney may serve partly to explain the observation that vegetarians have lower blood pressures than omnivores, the latter consuming diets which are relatively richer in fats and poorer in fibre than the former. PMID:6253068

  20. 24小时动态血压与偶测血压的相关性研究%The Correlation Study between ABPM and Measuring Blood Pressure by Chance

    Institute of Scientific and Technical Information of China (English)

    马樱; 苏泽; 肖践明

    2001-01-01

    Objective To study on the relationship between ABPM(Atraumatic Monitoring of Dynamic Blood Pressure) and measuring blood pressure by chance.Methods Comparison and correlation analysis between parameter of ABPM in 479 hypertensive disease cases coinciding with WHO diagnosis standard and numeric value of measuring blood pressure by chance.Results Numeric value of measuring blood pressure by chance was Obviously higher than that mean 24 hour's blood pressure、mean daynight blood pressure and mean nighttime blood pressure(p<0.05);there were correlations between numeric value of measuring blood pressure by chance and some parameter of ABPM(p<0.01).Conclusions The correlation between 24 hour's dynamic blood pressure and measuring blood pressure by chance is not high,of not high,if the criteria of measuring blood pressure by chance can not be used.However,ABPM is still as a reliable index of observing fluctuation of blood pressure and therapeutic efficacy.%目的探讨24小时动态血压与偶测血压的相关性.方法随机选择符合WHO诊断标准的高血压病患者479例,用无创性携带式动态血压检测仪进行24小时血压检测,检测前以标准汞柱式血压计按常规测右上臂血压,将获取的ABPM参数与偶测血压值作比较及相关分析.结果偶测血压值明显高于ABPM平均24h血压、平均白昼血压和平均夜间血压(p<0.05);偶测血压值与ABPM的几个参数值均有相关性(p<0.01),偶测SBP与白昼SBP的相关系数r=0.501,与夜间SBP的r=0.395,与24hSBP的r=0.114,偶测DBP与24hDBP的相关系数r=0.495,与夜间DBP的r=0.357,与白昼DBP的r=0.223.结论 24小时动态血压与偶测血压的相关性不高,不能用偶测血压的诊断指标,但ABPM仍不失作为观察血压波动与治疗效果的可靠指标.

  1. Association of low-level blood lead and blood pressure in NHANES 1999–2006

    International Nuclear Information System (INIS)

    This study investigated whether low blood-lead levels (≤10 μg/dL) were associated with blood pressure (BP) outcomes. The authors analyzed data from National Health and Nutrition Examination Survey 1999–2006 and participants aged 20 years or older. Outcome variables were systolic and diastolic BP measurements, pulse pressure, and hypertension status. Multivariable linear and logistic regressions stratified by race/ethnicity and gender were performed. Blood lead levels (BLL) were significantly correlated with higher systolic BP among black men and women, but not white or Mexican–American participants. BLLs were significantly associated with higher diastolic BPs among white men and women and black men, whereas, a negative association was observed in Mexican–American men that had, also, a wider pulse pressure. Black men in the 90th percentile of blood lead distribution (BLL≥3.50 μg/dL) compared to black men in the 10th percentile of blood lead distribution (BLL≤0.7 μg/dL) had a significant increase of risk of having hypertension (adjusted POR=2.69; 95% CI: 1.08–6.72). In addition, blood cadmium was significantly associated with hypertension and systolic and diastolic blood. This study found that, despite the continuous decline in blood lead in the U.S. population, lead exposure disparities among race and gender still exist.

  2. TL-200 Tensymetry连续无创血压与直接桡动脉测量不稳定血压的对比%Comparison of the Results of TL-200 Tensymetry Non-invasive Blood Pressure and Radial Artery Directly Measurement for Unstable ;Blood Pressure

    Institute of Scientific and Technical Information of China (English)

    沈新明

    2014-01-01

    Objective:To compare the results of TL-200 Tensymetry non-invasive blood pressure and radial artery directly measurement for unstable blood pressure. Method:80 patients in the need for measure blood pressure,they were measured by T-line and A-line for blood pressure monitoring. The results were compared and analyzed. Result:The results for average blood pressure values by T-line and A-Line were generally in the same. There was no regression changes for SBP and DBP. It showed that the results highly related. Conclusion:It can implement real time,non-invasive, continuous,accuracy for ambulatory blood pressure monitoring by T-line,it has a higher clinical value and worthy of application.%目的:比较TL-200 Tensymetry连续无创血压与直接桡动脉测量不稳定血压的临床效果。方法:对本院收治的80例需进行连续实时动脉血压监测的患者,分别于两侧桡动脉采取无创连续血压监测系统(T-line)与直接桡动脉血压监测(A-line)进行血压监测,比较两种方法血压监测结果,并对结果进行分析。结果:T-line与A-line血压测定结果平均血压值基本一致,决定系数也较高;收缩压和舒张压均未出现回归关系的变化,表明T-line与A-Line血压测定结果具有高度一致性。结论:T-line能够实现实时、无创、连续、准确血压动态监测,较间断袖带式血压测量和直接桡动脉血压测量临床应用和推广价值更高。

  3. Blood pressure and plasma catecholamines in acute and prolonged hypoxia

    DEFF Research Database (Denmark)

    Kanstrup, I L; Poulsen, T D; Hansen, J M;

    1999-01-01

    5 days after rapid, passive transport to high altitude (4,559 m). Acute mountain sickness scores ranged from 5 to 16 (maximal attainable score: 20) on the first day but were reduced to 0-8 by the fifth day. Systolic blood pressure, heart rate, and plasma epinephrine increased on day 1 at altitude......This study measured the pressor and plasma catecholamine response to local hypothermia during adaptation to hypobaric hypoxia. Eight healthy men were studied at rest and after 10 and 45 min of local cooling of one hand and forearm as well as after 30 min of rewarming at sea level and again 24 h and...... compared with sea level but declined again on day 5, whereas diastolic and mean blood pressures continued to rise in parallel with plasma norepinephrine. With local cooling, an increased vasoactive response was seen on the fifth day at altitude. Very high pressures were obtained, and the pressure elevation...

  4. Accuracy of blood pressure monitors available in high street pharmacies.

    Science.gov (United States)

    Ware, Adam; Stevens, Richard; Selwood, Mary; Fleming, Susannah

    2016-02-01

    The aim of this study was to assess the accuracy of automated blood pressure monitors on sale to the UK general public. We conducted static pressure accuracy testing on all compatible (19 out of 22 available) blood pressure monitors available for sale in pharmacies within the city of Oxford, UK, and tested two devices for accuracy in measurement of systolic and diastolic blood pressures in 21 adults. The devices showed good accuracy when measuring static pressure in laboratory bench testing, with the median error per device ranging from -2.2 to +1.2 mmHg; however, the two devices tested performed worse in vivo than in laboratory tests, with median errors as high as 6 mmHg. The monitors showed good accuracy in static pressure testing, with a lack of correlation between monitor price and accuracy. However, higher error rates seen during in-vivo testing of a subset of monitors may indicate that static testing may not be appropriate for routine accuracy assessment of these monitors. PMID:26427055

  5. Correlation of blood pressure and the ratio of S1 to S2 as measured by esophageal stethoscope and wireless bluetooth transmission

    OpenAIRE

    Hoon Lim, Kyoung; Duck Shin, Young; Hi Park, Sang; Ho Bae, Jin; Jae Lee, Hong; Jung Kim, Seon; Yun Shin, Ji; Jin Choi, Young

    2013-01-01

    Objective : Esophageal stethoscope has the advantage of being non-invasive, easily placed and capability to monitor the heart sound. This study was designed to determine whether the ratio of S1 to S2 analyzed by esophageal stethoscope and wireless bluetooth transmission can be accurate indicator that express the correlation with blood pressure. Methods: Total 33 adult male and female without cardiac disorder and with normal heart rhythm were selected randomly as the subjects of this Study. Tw...

  6. Effects of particulate air pollution on blood pressure in a highly exposed population in Beijing, China : a repeated-measure study

    OpenAIRE

    Baccarelli Andrea; Barretta Francesco; Dou Chang; Zhang Xiao; McCracken John P; Díaz Anaité; Bertazzi Pier; Schwartz Joel; Wang Sheng; Hou Lifang

    2011-01-01

    Abstract Background Particulate Matter (PM) exposure is critical in Beijing due to high population density and rapid increase in vehicular traffic. PM effects on blood pressure (BP) have been investigated as a mechanism mediating cardiovascular risks, but results are still inconsistent. The purpose of our study is to determine the effects of ambient and personal PM exposure on BP. Methods Before the 2008 Olympic Games (June 15-July 27), we examined 60 truck drivers and 60 office workers on tw...

  7. High blood pressure - what to ask your doctor

    Science.gov (United States)

    What to ask your doctor about high blood pressure; Hypertension - what to ask your doctor ... problems? What medicines am I taking to treat high blood pressure? Do they have any side effects? What should ...

  8. A Nutritional Strategy for the Treatment of High Blood Pressure.

    Science.gov (United States)

    Podell, Richard N.

    1984-01-01

    Some physicians wonder if high blood pressure can be controlled without the use of drugs and their potential side effects. Current findings concerning nutrition and high blood pressure are presented. (RM)

  9. "Keep the Beat": Healthy Blood Pressure Helps Prevent Heart Disease

    Science.gov (United States)

    ... Keep the Beat": Healthy Blood Pressure Helps Prevent Heart Disease Past Issues / Winter 2010 Table of Contents Your ... a condition that also increases the chance of heart disease and stroke. High blood pressure is especially common ...

  10. Dietary Mineral Could Be One Key to Blood Pressure Control

    Science.gov (United States)

    ... html Dietary Mineral Could Be One Key to Blood Pressure Control People who didn't get enough daily ... nutrient magnesium might be a boon to good blood pressure, new research suggests. "Magnesium dilates arteries, and in ...

  11. Snapshot: Blood Pressure in the U.S.

    Science.gov (United States)

    ... please visit this page: About CDC.gov . Home Blood Pressure: Make Control Your Goal Infographic Recommend on Facebook ... Compartir Copy the code below to use the Blood Pressure Infographic on your web page or social media ...

  12. Blood Pressure Problems During Pregnancy, Heart Trouble Later?

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_159580.html Blood Pressure Problems During Pregnancy, Heart Trouble Later? Spotting risk ... 27, 2016 (HealthDay News) -- Pregnant women who have blood pressure in the high-normal range may have an ...

  13. Even Poorer Nations Not Immune to High Blood Pressure

    Science.gov (United States)

    ... html Even Poorer Nations Not Immune to High Blood Pressure Researchers cite aging populations, diet, inactivity and lack ... HealthDay News) -- For the first time ever, high blood pressure rates are higher in low- and middle-income ...

  14. Standard Blood Pressure Target is Sufficient for Treating Some Strokes

    Science.gov (United States)

    ... News Releases News Release Wednesday, June 8, 2016 Standard blood pressure target is sufficient for treating some ... of Minnesota An international stroke study found that standard and intensive blood pressure treatments were equally effective ...

  15. Hypertension, blood pressure, cognition and cerebral blood flow in the cohort of "Men born 1914"

    OpenAIRE

    Reinprecht, Faina

    2006-01-01

    "Men born 1914" is a population based cohort study of the epidemiology of cardiovascular disease. Five hundred men, born 1914, were examined at the age of 68 and 185 of them were re-examined at 81 years of age. Examination included a medical and a psychological investigation, ultrasonographic measurement of carotid arteries, 24-hour ambulatory blood pressure monitoring, regional cerebral blood flow, and cardiovascular risk factors. It is well known that hypertension plays a major et...

  16. Tissue-Informative Mechanism for Wearable Non-invasive Continuous Blood Pressure Monitoring

    Science.gov (United States)

    Woo, Sung Hun; Choi, Yun Young; Kim, Dae Jung; Bien, Franklin; Kim, Jae Joon

    2014-10-01

    Accurate continuous direct measurement of the blood pressure is currently available thru direct invasive methods via intravascular needles, and is mostly limited to use during surgical procedures or in the intensive care unit (ICU). Non-invasive methods that are mostly based on auscultation or cuff oscillometric principles do provide relatively accurate measurement of blood pressure. However, they mostly involve physical inconveniences such as pressure or stress on the human body. Here, we introduce a new non-invasive mechanism of tissue-informative measurement, where an experimental phenomenon called subcutaneous tissue pressure equilibrium is revealed and related for application in detection of absolute blood pressure. A prototype was experimentally verified to provide an absolute blood pressure measurement by wearing a watch-type measurement module that does not cause any discomfort. This work is supposed to contribute remarkably to the advancement of continuous non-invasive mobile devices for 24-7 daily-life ambulatory blood-pressure monitoring.

  17. Relationship between children’s and parents’ blood pressure

    Directory of Open Access Journals (Sweden)

    Desy Aswira Nasution

    2014-07-01

    Full Text Available Background A family history of hypertension is a risk factor for hypertension in children. Past studies have reported a significant relationship between elevated blood pressure in children and hypertensive parents. Objective To assess for an association between blood pressure in children and that of their parents. Methods A cross-sectional study was conducted in 90 children aged 6-18 years in Baringin Village, Panyabungan, from May to June 2010. Subjects were collected by consecutive sampling. Classification of hypertension was based on Fourth Task Force Guidelines by measuring blood pressure, height, and weight. We used Student’s T-test to analyze numerical data. Simple linear regression was used to investigate the relationship between blood pressures of children and their parents. Results Of the 90 participants recruited, 24 boys and 17 girls had hypertensive parents. The mean systolic (SBP, diastolic (DBP and arterial blood pressure (MABP were significantly higher in children with hypertensive parents than in children with normotensive parents [(SBP 116.7 (SD 7.07 vs. 87.1 (SD 13.57 mmHg; P=0.0001, (DBP 77.8 (SD 8.33 vs. 51.8 (SD 11.70 mmHg; P=0.0001, (MABP 90.7 (SD 7.41 vs. 63.6 (12.10 mmHg; P=0.0001]. There was a significant relationship between elevated SBP in boys and their fathers, as indicated by the correlation coefficient (r=0.806; P=0.0001. Conclusion The blood pressure is significantly higher in children with hypertensive parents than in those with normotensive parents. There is a correlation between SBP in boys and that of their fathers. [Paediatr Indones. 2014;54:202-5.].

  18. Does home blood pressure monitoring improve patient outcomes? A systematic review comparing home and ambulatory blood pressure monitoring on blood pressure control and patient outcomes

    Science.gov (United States)

    Breaux-Shropshire, Tonya L; Judd, Eric; Vucovich, Lee A; Shropshire, Toneyell S; Singh, Sonal

    2015-01-01

    Objective Our objective was to compare the clinical effectiveness of home blood pressure monitoring (HBPM) and 24-hour ambulatory blood pressure monitoring (ABPM) on blood pressure (BP) control and patient outcomes. Design A systematic review was conducted. We also appraised the methodological quality of studies. Data sources PubMed, Scopus, CINAHL, and the Cochrane Central Register of Control Trials (CENTRAL). Inclusion criteria Randomized control trials, prospective and retrospective cohort studies, observational studies, and case-control studies published in English from any year to present that describe HBPM and 24-hour ABPM and report on systolic and/or diastolic BP and/or heart attack, stroke, kidney failure and/or all-cause mortality for adult patients. Due to the nature of the question, studies with only untreated patients were not considered. Results Of 1,742 titles and abstractions independently reviewed by two reviewers, 137 studies met predetermined criteria for evaluation. Nineteen studies were identified as relevant and included in the paper. The common themes were that HBPM and ABPM correlated with cardiovascular events and mortality, and targeting HBPM or ABPM resulted in similar outcomes. Associations between BP measurement type and mortality differed by study population. Both the low sensitivity of office blood pressure monitoring (OBPM) to detect optimal BP control by ABPM and the added association of HBPM with cardiovascular mortality supported the routine use of HBPM in clinical practice. There was insufficient data to determine the benefit of using HBPM as a measurement standard for BP control. Conclusion HBPM encourages patient-centered care and improves BP control and patient outcomes. Given the limited number of studies with both HBPM and ABPM, these measurement types should be incorporated into the design of randomized clinical trials within hypertensive populations. PMID:26170715

  19. Measurement of Strong Shock Pressure

    Directory of Open Access Journals (Sweden)

    Hajime Takada

    1997-01-01

    Full Text Available This paper deals with measurement of a strong shock pressure like an imploding detonation of over 1 GPa which cannot be measured directly with currently available commercial pressure transducers. After the transfer functions of three kinds of materials were measured using a shock tube, Teflon was selected as a shock absorber. As an example of pressure beyond the limit of the pressure transducer, we tried to measure pressure at the center of an imploding detonation. From this measurement, we could estimate the pressure peak of about 1.7 GPa.

  20. Secular trends of blood pressure in A-bomb survivors

    International Nuclear Information System (INIS)

    There has been controversy about whether or not radiation exposure plays a major role in advancing age. To preliminarily study this relationship, a statistical analysis was made on blood pressure measurements in a cohort of A-bomb survivors for Adult Health Study carried out during a 22-year period from 1958 through 1980. Systolic blood pressure increased with advancing age in both men and women between 30 and 80 years. During the years 1974 through 1980, it tended to increase in both men and women aged in their thirties and fourties. Diastolic blood pressure for men increased between the ages of 30 and 60 years, and decreased between the ages of 60 and 80 years. It tended to increase from year to year for men. For women, it decreased prior to the 1970's, and thereafter, tended to increase. The parameters, including systolic and diastolic blood pressures and pulse pressure, were independent of exposure doses in the subgroups according to age or sex. (Namekawa, K.)

  1. Oscillometric continuous blood pressure sensing for wearable health monitoring system

    CERN Document Server

    Gelao, Gennaro; Passaro, Vittorio M N; Perri, Anna Gina

    2015-01-01

    In this paper we present an acquisition chain for the measurement of blood arterial pressure based on the oscillometric method. This method does not suffer from any limitation as the well-known auscultatory method and it is suited for wearable health monitoring systems. The device uses a pressure sensor whose signal is filtered, digitalized and analyzed by a microcontroller. Local analysis allows the evaluation of the systolic and diastolic pressure values which can be used for local alarms, data collection and remote monitoring.

  2. Microcirculation impairment and blood pressure in sepsis

    Directory of Open Access Journals (Sweden)

    Domagoj Drenjančević

    2009-02-01

    Full Text Available Blood pressure is crucial for the tissue perfusion, oxygenation andelimination of metabolites in normal tissue. In septic patients itmay be altered by several mechanisms. Endothelial lesions andimpaired vasoregulation resulting from bacteriemia may producevasodilatation, hypotension, tissue hypoxia and decrease in theblood velocity. These events may favour disseminated intravascularcoagulation in septic patients, and thus pronounce perfusionmisdistribution. Since hypotension is commonly treated byvasoactive drugs to increase vascular tone toward normal values,more pronounced peripheral tissue ischemia may result. Duringthe process of blood pressure regulation in septic patients a diversityof physiological parameters should be encountered, i.e. age,body weight, core temperature, overall patients’ cardiovascularperformance, anemia, and protein status. In a healthy, adult person,in the absence of other causes of hypotension systolic bloodpressure of > 90 mmHg or mean arterial pressure ≥ 70 mmHgshould maintain adequate tissue perfusion. Together with specificantibiotics, therapeutic procedures like haemodilution, use of vasoconstrictors,vasopressin and its analogue terlipressin, corticosteroidsare currently used to improve outcome of hypotensive septicpatients. Numerous studies were undertaken to point the valuesof the biochemical tests suggesting a need for prompt intervention.The arterial lactate, cortisol response, TNF, interleukin (IL6, IL-12p70 and IL-12p40 production, together with submucosal(gastric intramucosal or sublingual CO2 values were proven as indicative.These may suggest whether microcirculatory impairmentis reversible or not, and which therapeutic maneuver should beappropriate.

  3. Blood distribution measurements

    International Nuclear Information System (INIS)

    The necessity of employing a vascular exploration technique, which is non-aggressive and repetitive, and which gives total and quantitative results led to the exploitation of a rheo-graphic method. An apparatus was constructed for making such measurements. Some appropriate statistics were subsequently determined which allowed the law concerning the establishment of a circulatory index to be determined as well as its statistical distribution and pathological threshold. The results of an examination, which are presented graphically, led to the establishment of a technique (known as cartography) giving the state of the circulation in a member. The application of this technique to persons affected with arteritis allowed the validity of the law and the previously established thresholds to be verified. The apparatus was completely automated and thus gives results which are entirely objective. (author)

  4. High-pressure processing for preservation of blood products

    NARCIS (Netherlands)

    Matser, A.M.; Ven, van der C.; Gouwerok, C.W.N.; Korte, de D.

    2005-01-01

    The possibilities of high pressure as a preservation method for human blood products were evaluated by examining the functional properties of blood fractions, after high-pressure processing at conditions which potentially inactivate micro-organisms and viruses. Blood platelets, red blood cells and b

  5. Changes in blood pressure, heart rate and blood constituents during heat exposure in men with elevated blood pressure

    Energy Technology Data Exchange (ETDEWEB)

    Gaebelein, C.J.; Senay, L.C. Jr.; Ladd, C.M.

    1985-01-01

    Although the vascular volume response of hypertensive men during exercise has been rather well characterized, the effect of resting heat exposure in this patient population has not been examined. This was done in the present report in seven men with high blood pressure (BP) (i.e., diastolic pressure greater than 12 kPa (90 mmHg) upon initial interview) and 5 normotensive control subjects. 50 min after each subject had consumed an amount of water equal to 1% of his body weight, he reclined on a cot. 10 min later the subject was carried into an environmental chamber equilibrated at Tdb = 45 degrees C, Twb = 28 degrees C. Free-flowing venous blood samples were obtained from a cubital vein, and BP and heart rate were measured, before the heat exposure and at 15 min intervals during the experiment. Within 30 min systolic, diastolic and mean BP of the high BP subjects had decreased to normal levels; no BP changes were detected in normotensive subjects. Accompanying this depressor response was an exaggerated elevation in plasma glucose concentration. No alterations were found with haematocrit, plasma osmolality or electrolytes, or total protein and albumin. The data suggest that heat exposure may have been more stressful for the subjects with high BP than for their controls. This finding implies that phasic depressor responses may be as important as phasic pressor episodes in the aetiology of established essential hypertension.

  6. Heart and Artery Damage and High Blood Pressure

    Science.gov (United States)

    ... Stroke More Heart and Artery Damage and High Blood Pressure Updated:Oct 22,2015 There are several harmful ... was last reviewed on 08/04/2014. High Blood Pressure • Home • About High Blood Pressure (HBP) • Why HBP ...

  7. 21 CFR 870.1140 - Venous blood pressure manometer.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Venous blood pressure manometer. 870.1140 Section... (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1140 Venous blood pressure manometer. (a) Identification. A venous blood pressure manometer is a device attached to a...

  8. 21 CFR 870.1120 - Blood pressure cuff.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Blood pressure cuff. 870.1120 Section 870.1120...) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1120 Blood pressure cuff. (a) Identification. A blood pressure cuff is a device that has an inflatable bladder in an...

  9. Acute effects of consumption of energy drinks on intraocular pressure and blood pressure

    Directory of Open Access Journals (Sweden)

    Ilechie AA

    2011-04-01

    Full Text Available A Alex Ilechie, Sandra TettehDepartment of Optometry, University of Cape Coast, GhanaBackground: Energy drinks contain a wide variety of ingredients including caffeine, for which there have been conflicting reports regarding its effects on intraocular pressure (IOP and blood pressure. The aim of this study was to investigate the acute effects of an energy drink (Red Bull® on the IOP and blood pressure of healthy young adults.Methods: Thirty healthy university students of either gender, aged 18–30 (mean 23.20 ± 2.81 years were randomly selected to participate in this study. The subjects were randomly divided into two groups (experimental and control and were asked to abstain from caffeine for 48 hours prior to and during the study. Baseline IOP and blood pressure were measured. The experimental group (n = 15 consumed one can of the energy drink (containing 85 mg of caffeine in 250 mL and measurements were repeated at 30, 60, and 90 minutes, while the control group drank 250 mL of water and were tested over the same time period.Results: When compared with baseline, a significant decrease (P < 0.05 in mean IOP at 60 and 90 minutes was observed in the experimental group. There was no corresponding change in systolic or diastolic blood pressure.Conclusion: Our results suggest that energy drinks (ie, Red Bull produce a significant reduction in IOP but have no effect on blood pressure. These findings may be interpreted as reflecting the effect of the combination of caffeine and taurine in the Red Bull energy drink. This effect may result from the known hypotensive effect of taurine, and warrants further study.Keywords: acute effect, intraocular pressure, blood pressure, glaucoma, caffeine, taurine

  10. Skin necrosis in a critically ill patient due to a blood pressure cuff

    OpenAIRE

    Devbhandari Mohan; Shariff Z; Duncan A

    2006-01-01

    The non-invasive method of blood pressure measurement is regarded as a safe procedure and the reports of any serious complications are rare. We report a unique case of extensive skin necrosis due to an intermittently inflating blood pressure cuff in a 65-year-old critically ill lady following a third time redo mitral valve surgery. A brief review of the literature on complications associated with noninvasive method of measurement of blood pressure is presented along with possible mechanisms o...

  11. Noninvasive measurement of pulmonary blood volume

    International Nuclear Information System (INIS)

    In noninvasive estimation of pulmonary blood volume by radionuclide-angiocardiography, a formula was derived from experiments with heart-lung model, and in vivo experiments PBV = CO x PPT x 0.77. The pulmonary blood volume estimated clinically by this formula was in good agreement with the results obtained invasively before. The compliance (δV/δP) of the pulmonary ''venous'' system was calculated by simultaneous measurement of pressure changes in lung field on leg elevation and changes in pulmonary arterial wedge pressure with Swan-Ganz catheter. The compliances which were calculated in 35 cases of heart diseases by this method were in a considerably good agreement with those which were assessed by analysis of a pulmonary arterial wedge pressure tracing. (Ueda, J.)

  12. Risk Stratification by Ambulatory Blood Pressure Monitoring Across JNC Classes of Conventional Blood Pressure

    DEFF Research Database (Denmark)

    Brguljan-Hitij, Jana; Thijs, Lutgarde; Li, Yan;

    2014-01-01

    BACKGROUND: Guidelines propose classification of conventional blood pressure (CBP) into normotension (<120/<80 mm Hg), prehypertension (120-139/80-89 mm Hg), and hypertension (≥140/≥90 mm Hg). METHODS: To assess the potential differential contribution of ambulatory blood pressure (ABP) in predict......BACKGROUND: Guidelines propose classification of conventional blood pressure (CBP) into normotension (...) in predicting risk across CBP strata, we analyzed outcomes in 7,826 untreated people recruited from 11 populations. RESULTS: During an 11.3-year period, 809 participants died (276 cardiovascular deaths) and 639, 383, and 225 experienced a cardiovascular, cardiac, or cerebrovascular event. Compared...... with normotension (n = 2,639), prehypertension (n = 3,076) carried higher risk (P ≤ 0.015) of cardiovascular (+41%) and cerebrovascular (+92%) endpoints; compared with hypertension (n = 2,111) prehypertension entailed lower risk (P ≤ 0.005) of total mortality (-14%) and cardiovascular mortality (-29...

  13. Inner ocular blood flow responses to an acute decrease in blood pressure in resting humans

    International Nuclear Information System (INIS)

    Whether inner ocular vessels have an autoregulatory response to acute fluctuations in blood pressure is unclear. We tried to examine the validity of acute hypotension elicited by thigh-cuff release as to assess the dynamic autoregulation in the ocular circulation. Blood flow velocity in the superior nasal and inferior temporal retinal arterioles, and in the retinal and choroidal vasculature were measured with the aid of laser speckle flowgraphy before and immediately after an acute decrease in blood pressure in 20 healthy subjects. Acute hypotension was induced by a rapid release of bilateral thigh occlusion cuffs that had been inflated to 220 mmHg for 2 min. The ratio of the relative change in retinal and choroidal blood flow velocity to the relative change in mean arterial blood pressure (MAP) was calculated. Immediately after cuff release, the MAP and blood flows in the all ocular target vessels decreased significantly from the baseline values obtained before thigh-cuff release. The ratio of the relative change in inner ocular blood flow velocity to that in the MAP exceeded 1% / %mmHg. An explicit dynamic autoregulation in inner ocular vessels cannot be demonstrated in response to an acute hypotension induced by the thigh-cuff release technique. (paper)

  14. 无创式微型动态血压监护仪的设计%A new portable non-invasive sphygmomanometer for dynamic blood pressure measurement

    Institute of Scientific and Technical Information of China (English)

    杜晓兰; 吴宝明; 陈林; 何庆华

    2004-01-01

    目的:研制一种无创式微型动态血压监护仪.方法:以一片80c196单片机和一个高分辨率液晶显示器(LCD)为基础,采用振动法原理和数据处理技术实现血压参数的实时检测和显示.结果:系统可动态实时显示所采集的血压波形和检测参数,并可存储显示24 h内的血压数据信号,通过RS232接口可完成与计算机之间的数据通讯.结论:该仪器小型轻便,使用灵活,有较强的抗干扰能力,具有很大的应用价值.%AIM: To develop a non-invasive portable monitor for accurate dynamic blood pressure(BP) measurement.METHODS: With a piece of 80c196 singlechip and a high-differentiation LCD, a new portable monitor could carry out real-time examination and display of BP parameters on the basis of oscillometric method theory and data processing technique.RESULTS: System could dynamically show real-time BP wave shape and parameters, which then stored in computer for 24 hours for inter-computer communication through RS232 interface.CONCLUSION: This kind of sphygmomanometer was of great applicable value because of mini-type and portability, as well as agile usage and anti-interference capability.

  15. Cuff inflation during ambulatory blood pressure monitoring and heart rate

    Directory of Open Access Journals (Sweden)

    Mia Skov-Madsen

    2008-11-01

    Full Text Available Mia Skov-Madsen, My Svensson, Jeppe Hagstrup ChristensenDepartment of Nephrology, Aarhus University Hospital, Aalborg, DenmarkIntroduction: Twenty four-hour ambulatory blood pressure monitoring is a clinically validated procedure in evaluation of blood pressure (BP. We hypothesised that the discomfort during cuff inflation would increase the heart rate (HR measured with 24-h ambulatory BP monitoring compared to a following HR measurement with a 24-h Holter monitor.Methods: The study population (n = 56 were recruited from the outpatient’s clinic at the Department of Nephrology, Aalborg Hospital, Aarhus University Hospital at Aalborg, Denmark. All the patients had chronic kidney disease (CKD. We compared HR measured with a 24-h Holter monitor with a following HR measured by a 24-h ambulatory BP monitoring.Results: We found a highly significant correlation between the HR measured with the Holter monitor and HR measured with 24-h ambulatory blood pressure monitoring (r = 0.77, p < 0.001. Using the Bland-Altman plot, the mean difference in HR was only 0.5 beat/min during 24 hours with acceptable limits of agreement for both high and low HR levels. Dividing the patients into groups according to betablocker treatment, body mass index, age, sex, angiotensin-converting enzyme inhibitor treatment, statins treatment, diuretic treatment, or calcium channel blocker treatment revealed similar results as described above.Conclusion: The results indicate that the discomfort induced by cuff inflation during 24-h ambulatory BP monitoring does not increase HR. Thus, 24-h ambulatory BP monitoring may be a reliable measurement of the BP among people with CKD.Keywords: ambulatory blood pressure monitoring, Holter monitoring, heart rate, chronic kidney disease, hypertension

  16. Pressure measurement on rotating machinery

    Science.gov (United States)

    Pemberton, Addison; Harris, Louis R.

    The objective of this paper is to describe the use of pressure scanners for measuring multiple unknown pressures in rotating machinery. Pressure scanners consist of stepper driven selector valves, which sequentially connect unknown pressures and apply these pressures to a single pressure transducer. This generates analog voltage signals which can be computerized and plotted while a pressure test is in progress. When an electrical selector switch on the same stepper driven shaft is added, thermocouple signals can be brought out of a rotating machine synchronously with pressure data.

  17. E-health blood pressure control program.

    Science.gov (United States)

    Ahern, David K; Stinson, Lynda J; Uebelacker, Lisa A; Wroblewski, Joseph P; McMurray, Jerome H; Eaton, Charles B

    2012-01-01

    Both technological and human factors design requirements for integration of home blood pressure monitoring (HBPM) into a patient centered medical home (PCMH) model primary care practice are described. Patients with uncontrolled hypertension were given home blood pressure (BP) monitors, and after a three-month run-in period introduced to either a high-tech only (HBPM connectivity to personal health record and tailored Web portal access) or a high-tech/"high-touch" (high-tech solution plus patient navigator [PN]) solution. Features of the Web portal included: BP graphing function, traffic-light feedback system of BP goal attainment, economic incentives for self-monitoring, and dual patient-facing and care-team-facing dashboard functions. The e-health BP control system with PN support was well received by patients, providers, and the healthcare team. Current e-health technology and limited technological literacy of many patients suggest that a PN or some other personnel resource may be required for the adoption of patient-facing technology in primary care. PMID:23167022

  18. Continuous non-invasive finger blood pressure monitoring in children.

    Science.gov (United States)

    Tanaka, H; Thulesius, O; Yamaguchi, H; Mino, M; Konishi, K

    1994-06-01

    We evaluated the performance of continuous non-invasive finger arterial pressure measurement using the volume-clamp technique (Finapres). This study was designed to compare finger arterial pressure with brachial blood pressure estimated by the auscultatory method in 217 children (90 boys and 127 girls) aged 4-16 years and in 38 adults (aged 18-45 years). Finger and brachial artery pressure readings were obtained consecutively from the ipsilateral side in the supine position. Finger arterial pressure waveforms were recorded in all children except 4 with small and thin fingers. There was good agreement for systolic pressure with only a slight underestimation of 1.9 mmHg and 5.1 mmHg lower for diastolic pressure. This difference most probably reflects inaccuracy of the auscultatory cuff method rather than an error in the Finapres. There was large inter-individual variability in Finapres recordings which might be due to differences in vasomotor tone, as demonstrated by systolic amplification in 5 patients with anorexia. However, Finapres showed a small within-subject variability (3.8 mmHg for systolic and 4.1 mmHg for diastolic pressure) determined in 5 patients during phenylephrine infusion, and as good reproducibility as the auscultatory method. These results suggest that finger arterial pressure measurement in children older than 6 years of age has similar accuracy as that in adults, and that this method is useful for clinical applications in children, especially for the non-invasive evaluation of autonomic control and cardiovascular reflexes involving transient and rapid blood pressure changes. PMID:7919764

  19. Instrument measures dynamic pressure fluctuations

    Science.gov (United States)

    Coats, J. W.; Penko, P. E.; Reshotko, M.

    1977-01-01

    Pressure probe instrument, incorporating "infinite line" principle, can be used to remotely measure dynamic pressure fluctuations in hot high-pressure environemnts too severe for sensors. System is designed and can be utilized for measurements in core of operating turbofan engine.

  20. Blood pressure load does not add to ambulatory blood pressure level for cardiovascular risk stratification

    DEFF Research Database (Denmark)

    Li, Yan; Thijs, Lutgarde; Boggia, José;

    2014-01-01

    Experts proposed blood pressure (BP) load derived from 24-hour ambulatory BP recordings as a more accurate predictor of outcome than level, in particular in normotensive people. We analyzed 8711 subjects (mean age, 54.8 years; 47.0% women) randomly recruited from 10 populations. We expressed BP...

  1. 基于光电容积脉搏波描记法的无创连续血压测量%The Research Progress of Non-Invasive and Continuous Blood Pressure Measurement Based on Photoplethysmography

    Institute of Scientific and Technical Information of China (English)

    李章俊; 王成; 朱浩; 金凡; 马俊领

    2012-01-01

    Noninvasive and continuous blood pressure monitoring have been intensively investigated and developed in attempt to getting rid of inflatable cuff and realizing the long term blood pressure monitoring. This article analyzed the principle of noninvasive and continuous blood pressure measurement based on photoplethysmography (PPG) . The researches of current noninvasive blood pressure monitoring based on the PPG ware claasi fied into three categories including combination of electrocardiograph ( ECG) and PPG, two channels PPG, and utilization of pulse characteristic parameter. The measurement accuracy, advantage and disadvantage of the three technologies were summarized. The development tendency of the noninvasive and continuous monitoring blood pressure based on the PPG was discussed.%为了摆脱传统血压计充气袖带的束缚、实现长期连续的血压监测,很多学者开展了基于PPG实现无创、连续血压监测的研究.阐述基于光电容积脉搏波描记法( PPG)实现无创、连续血压测量的基本原理.将当前基于PPG无创血压监测的研究分为3类,分别为心电(ECG)与PPG结合的血压测量技术、两路PPG结合的血压测量技术、脉搏波特征参数血压测量技术,分析这3类技术的基本测量原理、测量精度及其优缺点.在此基础上,论述基于PPG实现无创、连续监测血压的发展方向.

  2. Surfactant bolus instillation: effects of different doses on blood pressure and cerebral blood flow velocities

    OpenAIRE

    Rey, M.; Segerer, Hugo; Kiessling, C.; Obladen, Michael

    1994-01-01

    Fifteen preterm infants suffering from respiratory distress syndrome were randomly allocated to receive either high-dose (200 mg/kg) or low-dose (100 mg/kg) surfactant treatment. Retreatments were done with the low dose. Blood pressure, blood gases and cerebral blood flow velocities were determined before and after 24 bolus instillations. With the high dose mean blood pressure and mean cerebral blood flow velocity dropped significantly. With the low dose only mean cerebral blood flow velocity...

  3. Heritability of blood pressure traits and the genetic contribution to blood pressure variance explained by four blood-pressure-related genes.

    NARCIS (Netherlands)

    Rijn, M.J. van; Schut, A.F.; Aulchenko, Y.S.; Deinum, J.; Sayed-Tabatabaei, F.A.; Yazdanpanah, M.; Isaacs, A.; Axenovich, T.I.; Zorkoltseva, I.V.; Zillikens, M.C.; Pols, H.A.; Witteman, J.C.; Oostra, B.A.; Duijn, C.M. van

    2007-01-01

    OBJECTIVE: To study the heritability of four blood pressure traits and the proportion of variance explained by four blood-pressure-related genes. METHODS: All participants are members of an extended pedigree from a Dutch genetically isolated population. Heritability and genetic correlations of systo

  4. Cuff-Free Blood Pressure Estimation Using Pulse Transit Time and Heart Rate

    OpenAIRE

    Wang, Ruiping; Jia, Wenyan; Mao, Zhi-Hong; Sclabassi, Robert J.; Sun, Mingui

    2014-01-01

    It has been reported that the pulse transit time (PTT), the interval between the peak of the R-wave in electrocardiogram (ECG) and the fingertip photoplethysmogram (PPG), is related to arterial stiffness, and can be used to estimate the systolic blood pressure (SBP) and diastolic blood pressure (DBP). This phenomenon has been used as the basis to design portable systems for continuously cuff-less blood pressure measurement, benefiting numerous people with heart conditions. However, the PTT-ba...

  5. Community Characteristics are Associated with Blood Pressure Levels in a Racially Integrated Community

    OpenAIRE

    Samuel, L. J.; Thorpe, R. J.; Bower, K. M.; LaVeist, T. A.

    2015-01-01

    Community problems have been associated with higher, and community resources and social cohesion with lower, blood pressure. However, prior studies have not accounted for potential confounding by residential racial segregation. This study tested associations between community characteristics and blood pressure levels and prevalent hypertension in a racially integrated community. The Exploring Health Disparities in Integrated Communities Study measured blood pressure in residents of two contig...

  6. Heat stress attenuates the increase in arterial blood pressure during the cold pressor test

    OpenAIRE

    Cui, Jian; Shibasaki, Manabu; Low, David A.; Keller, David M.; Davis, Scott L.; Crandall, Craig G.

    2010-01-01

    The mechanisms by which heat stress impairs the control of blood pressure leading to compromised orthostatic tolerance are not thoroughly understood. A possible mechanism may be an attenuated blood pressure response to a given increase in sympathetic activity. This study tested the hypothesis that whole body heating attenuates the blood pressure response to a non-baroreflex-mediated sympathoexcitatory stimulus. Ten healthy subjects were instrumented for the measurement of integrated muscle sy...

  7. Results of ambulatory arterial blood pressure monitoring in children with obesity

    OpenAIRE

    Faruk Öktem

    2010-01-01

    Objectives: The relationship between obesity and essential hypertension is well known. In this study, we aimed to evaluate ambulatory arterial blood pressure monitoring of obese and non-obese children who had similar demographic characteristics.Materials and methods: Seventy one children and adolescents (n=39 obesity, n=32 controls) were studied. Blood pressure of the children were measured by 24 hour ambulatory blood pressure monitoring device.Results: Obese children had significantly higher...

  8. Predictive value and rate of change of blood pressure throughout adolescence : a Belgian prospective study

    OpenAIRE

    Saint-Remy, Annie; Rorive, Georges

    1991-01-01

    We performed a prospective study on the natural course of blood pressure throughout adolescence. The major goals were to assess the predictive value of a high blood pressure level at the age of 12 years and the feasibilty of developing a screening test for the early detection of young subjects at risk of developing chronic hypertension. By measuring the relationship between the initial level and subsequent changes in blood pressure, we looked for a phenomenon previously demonstrated in adults...

  9. Circadian variations in blood pressure in health and disease: implications for patient management

    OpenAIRE

    Slaughter, Mark

    2011-01-01

    Atul R Chugh1, John H Loughran1, Mark S Slaughter21Division of Cardiovascular Medicine, 2Division of Thoracic and Cardiovascular Surgery, University of Louisville, Louisville, KY, USAAbstract: Traditionally, blood pressure measurements have been performed in office settings and have provided the basis for all diagnostic and therapeutic decisions. However, the development of a clinically relevant 24-hour blood pressure monitoring system has added greatly to the ability of blood pressure values...

  10. Wearable Beat-to-Beat Blood Pressure Monitor

    Science.gov (United States)

    Lee, Yong Jin

    2015-01-01

    Linea Research Corporation has developed a wearable noninvasive monitor that provides continuous blood pressure and heart rate measurements in extreme environments. Designed to monitor the physiological effects of astronauts' prolonged exposure to reduced-gravity environments as well as the effectiveness of various countermeasures, the device offers wireless connectivity to allow transfer of both real-time and historical data. It can be modified to monitor the health status of astronaut crew members during extravehicular missions.

  11. Economic evaluation of home blood pressure telemonitoring

    DEFF Research Database (Denmark)

    Madsen, Line Bille; Christiansen, Terkel; Kirkegaard, Peder;

    2011-01-01

    Aims. The purpose of the present study was to compare the costs of home blood pressure (BP) telemonitoring (HBPM) with the costs of conventional office BP monitoring. In a randomized controlled trial, 105 hypertensive patients performed HBPM and 118 patients received usual care with conventional......-time ambulatory BP (ABP) were reduced in both groups. The uncertainty around the incremental cost effectiveness ratio point estimates was considerable for both systolic and diastolic ABP. For systolic ABP, the difference in cost effectiveness ratio between the two groups was 256 Danish kroner (DKK)/mmHg [95......% uncertainty interval, UI -860 to 4544]. For diastolic ABP, the difference in cost effectiveness ratio between the two groups was 655 DKK/mmHg [95% UI -674 to 69315]. Medication and consultation costs were lowest in the intervention group, but were offset by the cost of the telemonitoring equipment...

  12. Familial aggregation and childhood blood pressure.

    Science.gov (United States)

    Wang, Xiaoling; Xu, Xiaojing; Su, Shaoyong; Snieder, Harold

    2015-01-01

    There is growing concern about elevated blood pressure (BP) in children. The evidence for familial aggregation of childhood BP is substantial. Twin studies have shown that a large part of the familial aggregation of childhood BP is due to genes. The first part of this review provides the latest progress in gene finding for childhood BP, focusing on the combined effects of multiple loci identified from the genome-wide association studies on adult BP. We further review the evidence on the contribution of the genetic components of other family risk factors to the familial aggregation of childhood BP including obesity, birth weight, sleep quality, sodium intake, parental smoking, and socioeconomic status. At the end, we emphasize the promise of using genomic-relatedness-matrix restricted maximum likelihood (GREML) analysis, a method that uses genome-wide data from unrelated individuals, in answering a number of unsolved questions in the familial aggregation of childhood BP. PMID:25432901

  13. Neuro-endocrine regulation of blood pressure

    Directory of Open Access Journals (Sweden)

    Sandeep Chopra

    2011-01-01

    Full Text Available As our understanding of the underlying aetiology of hypertension is far from adequate, over 90% of patients with hypertension receive a diagnosis of essential hypertension. This non-specific diagnosis leads to suboptimal therapeutics and a major problem with non-compliance. Understanding the normal control of blood pressure (BP is, hence, important for a better understanding of the disease.This review attempts to unravel the present understanding of BP control. The local mechanisms of BP control, the neural mechanisms, renal-endocrine mechanisms, and a variety of other hormones that have a bearing in normal BP control are discussed and the possible role in the pathophysiology is alluded to.

  14. Pharmacological attenuation of blood pressure variability

    Institute of Scientific and Technical Information of China (English)

    Claude JULIEN

    2005-01-01

    @@ Over the past few years, the research team of Professor Ding-feng SU has reported an impressive quantity of experimental data about the relationships between blood pressure variability (BPV) and end-organ damage, a topic of obvious clinical interest. This research work has been summarized in a paper that appeared in the August issue of the renowned journal Trends in Pharmacological Sciences[1]. The studies by Su et al provide convincing evidence that BPV is an independent cardiovascular risk factor that should be considered as such and, therefore, might become an important target for therapeutic interventions. Besides these exciting perspectives in the prevention and treatment of cardiovasculardiseases, the work by Su et al raises a series of physiological questions.

  15. Effects of vegetarian diets on blood pressure

    Directory of Open Access Journals (Sweden)

    Yokoyama Y

    2016-04-01

    Full Text Available Yoko Yokoyama,1,2 Kazuo Tsubota,2,3 Mitsuhiro Watanabe1,2,4,5 1Graduate School of Media and Governance, Keio University, Fujisawa, Kanagawa, 2Health Science Laboratory, 3Department of Ophthalmology, 4Department of Internal Medicine, Keio University School of Medicine, Tokyo, 5Faculty of Environment and Information Studies, Keio University, Fujisawa, Kanagawa, Japan Abstract: Hypertension is a major independent risk factor for coronary artery diseases, and the prevalence of hypertension is continuously increasing. Diet is an important factor that can be modified to prevent hypertension. According to the US Department of Health and Human Services, dietary patterns are defined as the quantities, proportions, and variety or combinations of different foods and beverages in diets and the frequency with which they are habitually consumed. In this review, the vegetarian dietary pattern is introduced with a focus on the effect on blood pressure (BP. Although the available evidence is limited, according to a previous meta-analysis of controlled trials, vegetarian dietary patterns significantly reduced systolic and diastolic BPs. One of the common features of a vegetarian diet is weight loss, which might, at least partially, explain the effect on BP. Other possible factors such as sodium, potassium, protein, amino acids, vitamin B-12, antioxidants, fiber, and the microbiome are introduced as possible mechanisms. Further studies are needed with non-Western populations to determine the most effective vegetarian dietary pattern and to explore the exact mechanisms by which these dietary patterns affect BP. Keywords: vegetarian diet, plant-based diet, blood pressure, hypertension, meta-analysis

  16. Medida da pressão arterial em crianças e adolescentes: recomendações das diretrizes de hipertensão arterial e prática médica atual Blood pressure measurement in children and adolescents: guidelines of high blood pressure recommendations and current clinical practice

    Directory of Open Access Journals (Sweden)

    Maria Alayde Mendonça da Silva

    2007-04-01

    Full Text Available OBJETIVO: Identificar, em crianças e adolescentes (7 a 17 anos, rede pública e privada de ensino, a freqüência de indivíduos já submetidos à medida da pressão arterial (MPA, o número de vezes, os locais em que foi realizada a aferição e o resultado informado. MÉTODOS: Estudo transversal. Amostragem por conglomerados em 40 escolas, nível fundamental e médio, sorteadas. Cálculo da amostra baseado na prevalência esperada de HAS em crianças e adolescentes. Protocolo: questionário sobre realização prévia de MPA (em caso afirmativo, quantas vezes, quando foi a última medida, o local e o resultado da medida e duas MPA. Variáveis independentes: sexo, faixa etária, classe econômica, escola pública ou privada. RESULTADOS: Amostra constituída de 1253 estudantes 1215 responderam ao questionário (97% 531 do sexo masculino média de 12,4 ± 3 anos. Prevalência de HAS: 7,7% 348 estudantes (29% já haviam medido a PA (54% 1 vez 35% 2 a 4 vezes 11% 5 ou mais 53% há menos de 1 ano. Posto de Saúde, residência, hospital e consultório foram os locais mais mencionados (27%, 16%, 15% e 14%, respectivamente. Houve associação significante entre prévia MPA com faixa etária de 15 a 17 anos, classes econômicas A e B e ser estudante de escola privada. CONCLUSÃO: Apesar das recomendações, há baixa freqüência de MPA (29% em crianças e adolescentes, demonstrando que a mesma não foi ainda incorporada na prática clínica.OBJECTIVE: To determine, in a school-based sample of children and adolescents, aged from 7 to 17 years, of both gender, in public and private schools, the frequency of students already submitted to blood pressure measure. METHODS: A cross-sectional study was carried out, sampling from a population pool of elementary and middle schools, randomly selected. The sample was calculated based on the expected prevalence of hypertension for the age group. Data were collected through a questionnaire. Blood pressure was

  17. Salt Really Does Boost Blood Pressure

    Institute of Scientific and Technical Information of China (English)

    Ransdell; pierson; 张仙根

    2000-01-01

    盐的摄入与高血压到底存在怎样的关系?多年来,人们对这个问题争论不休。现在,终于有了可靠的结论:A salty diet really does drive up bloodpressure;both in people with and without elevated pressure.本文出现了一个新的首字母缩略词DASH。《英汉大词典补编》尚未收入此词。所幸的是,本文作者对此DASH作了说明,DASH=Dietary Approaches to Stop Hypertension,我们是否可将它译成“食疗降血压法”?高血压是诱发各种心血管疾病的元凶,我们不能掉以轻心。本文的一个观点可供我们参考:An intake of sodium below thecurrent recommended daily level of 2,400 milligrams(毫克)could help Americansprevent blood pressure rises that occur especially with advancing age.

  18. 基于多传感器的无创血压测量系统的研究∗%A Research on Non-Invasive Blood Pressure Measurement System Based on Multi-Sensors

    Institute of Scientific and Technical Information of China (English)

    高云; 周聪聪; 田健; 涂春龙; 叶学松

    2015-01-01

    针对无创血压测量过程中易受手臂运动干扰影响测量准确度,设计研究了一种无创血压测量中抗运动干扰系统。该系统在常规的无创血压测量基础上,通过集成MEMS加速度传感器,实时采集血压测量过程中手臂运动的加速度信号,并将该信号作为自适应滤波器的参考信号来抵消原始信号中的运动干扰。实验结果表明该系统对测量过程中手臂局部运动的血压检测具有较好的抗运动干扰作用。该方法可用于其他已经存在的可穿戴的动态血压监测系统当中,提高其抗干扰能力,并对其他人体生理参数的穿戴式检测技术具有重要意义。%Since the blood pressure measurement is susceptible to the arm movement in the process of measurement, this paper implements a noninvasive blood pressure system with an anti-noise algorithm. The system based on the conventional noninvasive blood pressure measurement,collect the real-time information of the arm movement during the measurement by the use of a MEME acceleration transducer,which is used as the reference input of a self-adap-tive filter to eliminate the motion artifact by using the self-adaptive filtering algorithm. The experimental results show that the system is resistant to the partial arm motion artifact in the process of measuring blood pressure measure-ment. The method can be used by the other wearable blood pressure measurement system and improve its anti-inter-ference ability.

  19. BiSpectral Index (BIS) monitoring may detect critical hypotension before automated non-invasive blood pressure (NIBP) measurement during general anaesthesia; a case report. [v1; ref status: indexed, http://f1000r.es/2oi

    OpenAIRE

    Smith, Matthew M. J.

    2014-01-01

    A patient undergoing general anaesthesia for neurosurgery exhibited an unexpected sudden decrease in the BiSpectral Index (BIS) value to near-zero. This prompted the detection of profound hypotension using non-invasive blood pressure (NIBP) measurement and expedited urgent assessment and treatment, with the patient making a full recovery. Widely regarded as a ‘depth of anaesthesia’ monitor, this case demonstrates the potential extra clinical benefit BIS may have in the detection of critical i...

  20. Magnetic measurements under pressure

    Czech Academy of Sciences Publication Activity Database

    Zentková, M.; Arnold, Zdeněk; Mihalik, M.; Mihalik, M.; Zentko, A.; Kamarád, Jiří; Mitróová, Z.; Mat`aš, S.

    2006-01-01

    Roč. 57, 8/S (2006), s. 29-32. ISSN 1335-3632 Institutional research plan: CEZ:AV0Z10100521 Keywords : hydrostatic pressure * Prussian blue analogues * AC susceptibility * intermetallic compound * ferromagnetism * errimagnetism Subject RIV: BM - Solid Matter Physics ; Magnetism

  1. Quantitative measurement of blood cells

    International Nuclear Information System (INIS)

    Full text: We are observing and measuring the varying development reaction stages of blood cells to different saline solutions. The imaging process is based on a common path interferometer which is realized with a spatial light modulator (SLM) in the Fourier plane after the microscope objective. With the SLM we can shift the phase of the transmitted light with respect to the phase of signal wave. This principle is used for the phase contrast microscopy method where we take four pictures of the same image with different phase shifts in order to calculate the complex field of the measured cell. This microscope technique obtains quantitative data about the blood cell's surface in different development stages, amplitude and phase differences inside the cell itself. (author)

  2. Survey of blood pressure in 226Ra- and 90Sr-treated beagles

    International Nuclear Information System (INIS)

    Multiple blood pressure measurements on a total of 407 beagles with a non-invasive method showed the greatest frequency of mean pressures to be in the normal 101-120 mm Hg range. Another major group of dogs were hypertensive, with mean pressures of 120-140 mm Hg. Future correlation of canine blood pressures with diseases should prove useful in both veterinary and human medical research

  3. Does home blood pressure monitoring improve patient outcomes? A systematic review comparing home and ambulatory blood pressure monitoring on blood pressure control and patient outcomes

    Directory of Open Access Journals (Sweden)

    Breaux-Shropshire TL

    2015-07-01

    Full Text Available Tonya L Breaux-Shropshire,1,2 Eric Judd,1 Lee A Vucovich,3 Toneyell S Shropshire,4 Sonal Singh5 1Vascular Biology and Hypertension Program, Cardiovascular Disease, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA; 2Veterans Administration, Birmingham, AL, USA; 3Lister Hill Library, University of Alabama at Birmingham, Birmingham, AL, USA; 4Department of Physical Therapy, Louisiana State University Health Sciences Center, New Orleans, LA, USA; 5Department of Medicine, John Hopkins School of Medicine, Baltimore, MD, USA Objective: Our objective was to compare the clinical effectiveness of home blood pressure monitoring (HBPM and 24-hour ambulatory blood pressure monitoring (ABPM on blood pressure (BP control and patient outcomes. Design: A systematic review was conducted. We also appraised the methodological quality of studies. Data sources: PubMed, Scopus, CINAHL, and the Cochrane Central Register of Control Trials (CENTRAL. Inclusion criteria: Randomized control trials, prospective and retrospective cohort studies, observational studies, and case-control studies published in English from any year to present that describe HBPM and 24-hour ABPM and report on systolic and/or diastolic BP and/or heart attack, stroke, kidney failure and/or all-cause mortality for adult patients. Due to the nature of the question, studies with only untreated patients were not considered. Results: Of 1,742 titles and abstractions independently reviewed by two reviewers, 137 studies met predetermined criteria for evaluation. Nineteen studies were identified as relevant and included in the paper. The common themes were that HBPM and ABPM correlated with cardiovascular events and mortality, and targeting HBPM or ABPM resulted in similar outcomes. Associations between BP measurement type and mortality differed by study population. Both the low sensitivity of office blood pressure monitoring (OBPM to detect optimal BP control by ABPM and the

  4. Do maternal and intrauterine factors influence blood pressure in childhood?

    OpenAIRE

    Whincup, P H; Cook, D G; Papacosta, O

    1992-01-01

    It has been proposed that maternal health and nutrition may be important in the development of adult cardiovascular risk, and that blood pressure may be an important intermediate step in this process. To examine the relevance of this hypothesis in contemporary British children, the relationships of several maternal factors to blood pressure were studied in 3360 children of European origin aged 5-7 years. Maternal age, height, and body mass index were all positively related to blood pressure i...

  5. Blood pressure among the Inuit (Eskimo) populations in the Arctic

    DEFF Research Database (Denmark)

    Bjerregaard, Peter; Dewailly, Eric; Young, T Kue;

    2003-01-01

    Studies of blood pressure among various Inuit (Eskimo) populations in the Arctic have given inconsistent results. Most studies reported lower blood pressure among the Inuit as compared with the predominantly white national populations. This has been attributed to traditional subsistence practices...... and lifestyle. This study compared the blood pressure among the major Inuit population groups with other populations and examined the associations with factors like age, gender, obesity and smoking....

  6. Tissue-Informative Mechanism for Wearable Non-invasive Continuous Blood Pressure Monitoring

    OpenAIRE

    Woo, Sung Hun; Choi, Yun Young; Kim, Dae Jung; Bien, Franklin; Kim, Jae Joon

    2014-01-01

    Accurate continuous direct measurement of the blood pressure is currently available thru direct invasive methods via intravascular needles, and is mostly limited to use during surgical procedures or in the intensive care unit (ICU). Non-invasive methods that are mostly based on auscultation or cuff oscillometric principles do provide relatively accurate measurement of blood pressure. However, they mostly involve physical inconveniences such as pressure or stress on the human body. Here, we in...

  7. 24-h blood pressure in Space: The dark side of being an astronaut

    NARCIS (Netherlands)

    J.M. Karemaker; J. Berecki-Gisolf

    2009-01-01

    Inflight 24-h profiles of blood pressure (BP) and heart rate (HR) were recorded in 2 ESA-astronauts by automatic upper arm cuff measurements. In one astronaut this was combined with Portapres (TM) continuous finger blood pressure recordings. It was the intention to contrast the latter to 24-h record

  8. The Search for High-Impact Diagnostic and Management Tools for Low- and Middle-Income Countries: A Self-Powered Low-Cost Blood Pressure Measurement Device Powered by a Solid-State Vibration Energy Harvester.

    Science.gov (United States)

    Bilgen, Onur; Kenerson, John G; Akpinar-Elci, Muge; Hattery, Rebecca; Hanson, Lisbet M

    2015-08-01

    The World Health Organization has established recommendations for blood pressure measurement devices for use in low-resource venues, setting the "triple A" expectations of Accuracy, Affordability, and Availability. Because of issues related to training and assessment of proficiency, the pendulum has swung away from manual blood pressure devices and auscultatory techniques towards automatic oscillometric devices. As a result of power challenges in the developing world, there has also been a push towards semiautomatic devices that are not dependent on external power sources or batteries. Beyond solar solutions, disruptive technology related to solid-state vibrational energy harvesting may be the next iterative solution to attain the ultimate goal of a self-powered low-cost validated device that is simple to use and reliable. PMID:25913774

  9. Less than half of citizens, aged 55-64 years, had a normal blood pressure in a Danish population. prevalence of hypertension using telemedically transmitted home blood pressure

    DEFF Research Database (Denmark)

    Hoffmann-Petersen, N; Lauritzen, T; Bech, J N;

    2015-01-01

    55-64 years had an abnormally high HBP, and one fourth had a wrong diagnosis, either white coat or masked hypertension. Improvements in diagnosing and treating hypertension seem necessary, and telemedically transmitted home blood pressure measurements might by an effective procedure to reach the goal.......OBJECTIVE: Hypertension is the most important modifiable risk factor for cardiovascular disease. It is debated which method is optimal for diagnosing and treatment monitoring. Home blood pressure (HBP) is prognostically superior to office blood pressure (OBP) and similar to ambulatory BP. We wanted...

  10. Ouabain induces cardiac remodeling in rats independent of blood pressure

    Institute of Scientific and Technical Information of China (English)

    Xing JIANG; Yan-ping REN; Zhuo-ren L(U)

    2007-01-01

    Aim: To investigate the ouabain's effects on cardiac remodeling in rats. Methods:Male Sprague-Dawley rats were treated with ouabain. Systolic blood pressure(SBP) was recorded weekly. After 4 and 6 weeks, echocardiography were performed,hemodynamic parameters were measured by invasive cardiac catheterization,changes in cardiac ultrastructure were analyzed using transmission electron microscopy, the collagen fraction of the left ventricle was assessed with Picrosirius red stain, and RT-PCR was applied to evaluate the mRNA level of myosin heavy chain-α and-β in the left ventricle. Results: Having been treated with ouabain for 4 weeks, there was no significant difference in the mean SBP of the two groups.However, left ventricular hypertrophy, myocardial ultrastructure deterioration,and extracellular matrix remodeling were induced by ouabain treatment; meanwhile,cardiac systolic and diastolic performance were both worsened. Moreover, the cardiac MHC-β mRNA was upregulated by ouabain treatment, whereas MHC-αmRNA was downregulated. After 4 weeks, the mean SBP in the ouabain group began to increase and was significantly higher than that in control group after 6 weeks (P<0.01); the rats' cardiac structure and function were worsened.Conclusion: These results suggested that ouabain induces alterations in cardiac structure and function, and the effects happened before the increase of blood pressure. The results indicated that ouabain induced cardiac remodeling in rats independent of blood pressure.

  11. Predicting Increased Blood Pressure Using Machine Learning

    Directory of Open Access Journals (Sweden)

    Hudson Fernandes Golino

    2014-01-01

    Full Text Available The present study investigates the prediction of increased blood pressure by body mass index (BMI, waist (WC and hip circumference (HC, and waist hip ratio (WHR using a machine learning technique named classification tree. Data were collected from 400 college students (56.3% women from 16 to 63 years old. Fifteen trees were calculated in the training group for each sex, using different numbers and combinations of predictors. The result shows that for women BMI, WC, and WHR are the combination that produces the best prediction, since it has the lowest deviance (87.42, misclassification (.19, and the higher pseudo R2 (.43. This model presented a sensitivity of 80.86% and specificity of 81.22% in the training set and, respectively, 45.65% and 65.15% in the test sample. For men BMI, WC, HC, and WHC showed the best prediction with the lowest deviance (57.25, misclassification (.16, and the higher pseudo R2 (.46. This model had a sensitivity of 72% and specificity of 86.25% in the training set and, respectively, 58.38% and 69.70% in the test set. Finally, the result from the classification tree analysis was compared with traditional logistic regression, indicating that the former outperformed the latter in terms of predictive power.

  12. Blood pressure response to low level static contractions

    DEFF Research Database (Denmark)

    Fallentin, Nils; Jørgensen, Kurt

    1992-01-01

    The present study re-examines the 15% MVC concept, i.e. the existence of a circulatory steady-state in low intensity static contractions below 15% of maximal voluntary contraction (MVC). Mean arterial blood pressure was studied during static endurance contractions of the elbow flexor and extensor...... 0.7) min for elbow extension]. Mean arterial blood pressure exhibited a continuous and progressive increase during the 10% MVC contractions indicating that the 15% MVC concept would not appear to be valid. The terminal blood pressure value recorded at the point of exhaustion in the 10% MVC elbow...... the circulation to the muscles was arrested just prior to the cessation of the contraction, blood pressure only partly recovered and remained elevated for as long as the occlusion persisted, indicating the level of pressure-raising muscle chemoreflexes. Based on blood pressure recordings obtained...

  13. Associations of ambulatory blood pressure with urinary caffeine and caffeine metabolite excretions.

    Science.gov (United States)

    Guessous, Idris; Pruijm, Menno; Ponte, Belén; Ackermann, Daniel; Ehret, Georg; Ansermot, Nicolas; Vuistiner, Philippe; Staessen, Jan; Gu, Yumei; Paccaud, Fred; Mohaupt, Markus; Vogt, Bruno; Pechère-Bertschi, Antoinette; Pechère-Berstchi, Antoinette; Martin, Pierre-Yves; Burnier, Michel; Eap, Chin B; Bochud, Murielle

    2015-03-01

    Intake of caffeinated beverages might be associated with reduced cardiovascular mortality possibly via the lowering of blood pressure. We estimated the association of ambulatory blood pressure with urinary caffeine and caffeine metabolites in a population-based sample. Families were randomly selected from the general population of Swiss cities. Ambulatory blood pressure monitoring was conducted using validated devices. Urinary caffeine, paraxanthine, theophylline, and theobromine excretions were measured in 24 hours urine using ultrahigh performance liquid chromatography tandem mass spectrometry. We used mixed models to explore the associations of urinary excretions with blood pressure although adjusting for major confounders. The 836 participants (48.9% men) included in this analysis had mean age of 47.8 and mean 24-hour systolic and diastolic blood pressure of 120.1 and 78.0 mm Hg. For each doubling of caffeine excretion, 24-hour and night-time systolic blood pressure decreased by 0.642 and 1.107 mm Hg (both P values <0.040). Similar inverse associations were observed for paraxanthine and theophylline. Adjusted night-time systolic blood pressure in the first (lowest), second, third, and fourth (highest) quartile of paraxanthine urinary excretions were 110.3, 107.3, 107.3, and 105.1 mm Hg, respectively (P trend <0.05). No associations of urinary excretions with diastolic blood pressure were generally found, and theobromine excretion was not associated with blood pressure. Anti-hypertensive therapy, diabetes mellitus, and alcohol consumption modify the association of caffeine urinary excretion with systolic blood pressure. Ambulatory systolic blood pressure was inversely associated with urinary excretions of caffeine and other caffeine metabolites. Our results are compatible with a potential protective effect of caffeine on blood pressure. PMID:25489060

  14. Comparison of high-definition oscillometry -- a non-invasive technology for arterial blood pressure measurement -- with a direct invasive method using radio-telemetry in awake healthy cats.

    Science.gov (United States)

    Martel, Eric; Egner, Beate; Brown, Scott A; King, Jonathan N; Laveissiere, Arnaud; Champeroux, Pascal; Richard, Serge

    2013-12-01

    This study compared indirect blood pressure measurements using a non-invasive method, high-definition oscillometry (HDO), with direct measurements using a radio-telemetry device in awake cats. Paired measurements partitioned to five sub-ranges were collected in six cats using both methods. The results were analysed for assessment of correlation and agreement between the two methods, taking into account all pressure ranges, and with data separated in three sub-groups, low, normal and high ranges of systolic (SBP) and diastolic (DBP) blood pressure. SBP data displayed a mean correlation coefficient of 0.92 ± 0.02 that was reduced for low SBP. The agreement level evaluated from the whole data set was high and slightly reduced for low SBP values. The mean correlation coefficient of DBP was lower than for SBP (ie, 0.81 ± 0.02). The bias for DBP between the two methods was 22.3 ± 1.6 mmHg, suggesting that HDO produced lower values than telemetry. These results suggest that HDO met the validation criteria defined by the American College of Veterinary Internal Medicine consensus panel and provided a faithful measurement of SBP in conscious cats. For DBP, results suggest that HDO tended to underestimate DBP. This finding is clearly inconsistent with the good agreement reported in dogs, but is similar to outcomes achieved in marmosets and cynomolgus monkeys, suggesting that this is not related to HDO but is species related. The data support that the HDO is the first and only validated non-invasive blood pressure device and, as such, it is the only non-invasive reference technique that should be used in future validation studies. PMID:23813147

  15. Resistance exercise with different volumes: blood pressure response and forearm blood flow in the hypertensive elderly

    Directory of Open Access Journals (Sweden)

    Brito AF

    2014-12-01

    Full Text Available Aline de Freitas Brito,1 Caio Victor Coutinho de Oliveira,2 Maria do Socorro Brasileiro-Santos,1 Amilton da Cruz Santos1 1Physical Education Department, 2Research Laboratory for Physical Training Applied to Performance and Health, Federal University of Paraíba, João Pessoa, Brazil Background: The purpose of this study was to evaluate the effect of two sessions of resistance exercise with different volumes on post-exercise hypotension, forearm blood flow, and forearm vascular resistance in hypertensive elderly subjects.Methods: The study was conducted with ten hypertensive elderly (65±3 years, 28.7±3 kg/m2 subjected to three experimental sessions, ie, a control session, exercise with a set (S1, and exercise with three sets (S3. For each session, the subjects were evaluated before and after intervention. In the pre-intervention period, blood pressure, forearm blood flow, and forearm vascular resistance were measured after 10 minutes of rest in the supine position. Thereafter, the subjects were taken to the gym to perform their exercise sessions or remained at rest during the same time period. Both S1 and S3 comprised a set of ten repetitions of ten exercises, with an interval of 90 seconds between exercises. Subsequently, the measurements were again performed at 10, 30, 50, 70, and 90 minutes of recovery (post-intervention in the supine position.Results: Post-exercise hypotension was greater in S3 than in S1 (systolic blood pressure, −26.5±4.2 mmHg versus −17.9±4.7 mmHg; diastolic blood pressure, −13.8±4.9 mmHg versus −7.7±5 mmHg, P<0.05. Similarly, forearm blood flow and forearm vascular resistance changed significantly in both sessions with an increase and decrease, respectively, that was more evident in S3 than in S1 (P<0.05.Conclusion: Resistance exercises with higher volume were more effective in causing post-exercise hypotension, being accompanied by an increase in forearm blood flow and a reduction of forearm vascular

  16. Blood Pressure Characteristics in Moderate to Severe Renal Insufficiency

    Directory of Open Access Journals (Sweden)

    Zheyou Wu

    2015-09-01

    Full Text Available Background/Aims: Ambulatory blood pressure monitoring (ABPM in chronic kidney disease (CKD patients has been extensively studied, but few investigations have attempted to relate ABPM with CKD stages. The objectives of this article were to compare ABPM parameters for the diagnosis and treatment determination of CKD with daytime clinic blood pressure (BP measurements. We also investigated BP and renal injury in combined hypertension and CKD. We supposed ABPM was important in combined hypertension and CKD. Methods: We compared ABPM in hypertension patients, including 152 patients with combined hypertension and CKD. Patients with combined hypertension and CKD were grouped according to severity into stages 1 through 3 (Stage 1-3 and stages 4 and 5 (Stage 4-5. Results: In the Stage 4-5 group, systolic BP (SBP (daytime, nighttime and 24 h mean, diastolic BP (DBP, pulse pressure and SBP standard deviations (SD (daytime and 24 h were higher. SBP and DBP loads were significantly higher in the Stage 4-5 group. The nighttime load was higher than the daytime load. Mean arterial pressure (MAP was higher and heart rates (HR were faster in the Stage 4-5 group. Conclusions: BP load should be a component employed in ABPM to determine cardiovascular risk stratification. MAP and HR might be associated with risk to develop end-stage renal disease.

  17. CDC Vital Signs: High Blood Pressure and Cholesterol

    Science.gov (United States)

    ... 1.36 MB] Read the MMWR Science Clips High Blood Pressure and Cholesterol Out of Control Recommend on Facebook ... by County http://apps.nccd.cdc.gov/GISCVH2/ High Blood Pressure and High Cholesterol Among US Adults SOURCES: National ...

  18. Prenatal air pollution exposure and newborn blood pressure

    NARCIS (Netherlands)

    van Rossem, Lenie; Rifas-Shiman, Sheryl L.; Melly, Steven J.; Kloog, Itai; Luttmann-Gibson, Heike; Zanobetti, Antonella; Coull, Brent A.; Schwartz, Joel D.; Mittleman, Murray A.; Oken, Emily; Gillman, Matthew W.; Koutrakis, Petros; Gold, Diane R.

    2015-01-01

    Background: Air pollution exposure has been associated with increased blood pressure in adults. oBjective: We examined associations of antenatal exposure to ambient air pollution with newborn systolic blood pressure (SBP). Methods: We studied 1,131 mother–infant pairs in a Boston, Massachusetts, are

  19. 21 CFR 870.1110 - Blood pressure computer.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Blood pressure computer. 870.1110 Section 870.1110 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED... computer. (a) Identification. A blood pressure computer is a device that accepts the electrical signal...

  20. Effect of breathing techniques on blood pressure response to resistance exercise.

    OpenAIRE

    Linsenbardt, S T; Thomas, T. R.; Madsen, R W

    1992-01-01

    Twenty novice male weight lifters performed resistance exercises using three different breathing techniques to determine the effects on blood pressure. Systolic and diastolic blood pressures were measured by an automated non-invasive method while subjects performed the single arm curl and double knee extension using the different breathing techniques. Performing the Valsalva manoeuvre (breath-holding) during either the single arm curl or double knee extension produced the highest blood pressu...

  1. Sleep duration modifies effects of free ad libitum school meals on adiposity and blood pressure

    DEFF Research Database (Denmark)

    Hjorth, Mads Fiil; Sjödin, Anders Mikael; Dalskov, Stine-Mathilde;

    2016-01-01

    simultaneously for seven consecutive days using dietary records and accelerometers. Short and long sleeping children were defined as lower and upper tertile of sleep duration. Body composition, blood pressure, blood lipids, and homeostatic model assessment of insulin resistance (HOMAIR) were measured...... duration (all P≥0.32). Conclusions: The susceptibility to increase abdominal adiposity and blood pressure when exposed to dietary changes can potentially be explained by too little sleep that results in increased caloric intake and reduced physical activity....

  2. Non-invasive pulmonary blood flow analysis and blood pressure mapping derived from 4D flow MRI

    Science.gov (United States)

    Delles, Michael; Rengier, Fabian; Azad, Yoo-Jin; Bodenstedt, Sebastian; von Tengg-Kobligk, Hendrik; Ley, Sebastian; Unterhinninghofen, Roland; Kauczor, Hans-Ulrich; Dillmann, Rüdiger

    2015-03-01

    In diagnostics and therapy control of cardiovascular diseases, detailed knowledge about the patient-specific behavior of blood flow and pressure can be essential. The only method capable of measuring complete time-resolved three-dimensional vector fields of the blood flow velocities is velocity-encoded magnetic resonance imaging (MRI), often denoted as 4D flow MRI. Furthermore, relative pressure maps can be computed from this data source, as presented by different groups in recent years. Hence, analysis of blood flow and pressure using 4D flow MRI can be a valuable technique in management of cardiovascular diseases. In order to perform these tasks, all necessary steps in the corresponding process chain can be carried out in our in-house developed software framework MEDIFRAME. In this article, we apply MEDIFRAME for a study of hemodynamics in the pulmonary arteries of five healthy volunteers. The study included measuring vector fields of blood flow velocities by phase-contrast MRI and subsequently computing relative blood pressure maps. We visualized blood flow by streamline depictions and computed characteristic values for the left and the right pulmonary artery (LPA and RPA). In all volunteers, we observed a lower amount of blood flow in the LPA compared to the RPA. Furthermore, we visualized blood pressure maps using volume rendering and generated graphs of pressure differences between the LPA, the RPA and the main pulmonary artery. In most volunteers, blood pressure was increased near to the bifurcation and in the proximal LPA, leading to higher average pressure values in the LPA compared to the RPA.

  3. High Blood Pressure in Adolescents of Curitiba: Prevalence and Associated Factors

    Directory of Open Access Journals (Sweden)

    Rodrigo Bozza

    2016-01-01

    Full Text Available Abstract Background: Arterial hypertension is a major public health problem and has increased considerably in young individuals in past years. Thus, identifying factors associated with this condition is important to guide intervention strategies in this population. Objective: To determine high blood pressure prevalence and its associated factors in adolescents. Methods: A random sample of 1,242 students enrolled in public schools of the city of Curitiba (PR was selected. Self-administered questionnaires provided family history of hypertension, daily energy expenditure, smoking habit, daily fat intake, and socioeconomic status. Waist circumference was measured following standardized procedures, and blood pressure was measured with appropriate cuffs in 2 consecutive days to confirm high blood pressure. Relative frequency and confidence interval (95%CI indicated high blood pressure prevalence. Bivariate and multivariate analyses assessed the association of risk factors with high blood pressure. Results: The high blood pressure prevalence was 18.2% (95%CI 15.2-21.6. Individuals whose both parents had hypertension [odds ratio (OR, 2.22; 95%CI 1.28-3.85] and those with high waist circumference (OR, 2.1; 95%CI 1.34-3.28 had higher chances to develop high blood pressure. Conclusion: Positive family history of hypertension and high waist circumference were associated with high blood pressure in adolescents. These factors are important to guide future interventions in this population.

  4. A Discussion on the Regulation of Blood Flow and Pressure.

    Science.gov (United States)

    Wolff, Christopher B; Collier, David J; Shah, Mussadiq; Saxena, Manish; Brier, Timothy J; Kapil, Vikas; Green, David; Lobo, Melvin

    2016-01-01

    This paper discusses two kinds of regulation essential to the circulatory system: namely the regulation of blood flow and that of (systemic) arterial blood pressure. It is pointed out that blood flow requirements sub-serve the nutritional needs of the tissues, adequately catered for by keeping blood flow sufficient for the individual oxygen needs. Individual tissue oxygen requirements vary between tissue types, while highly specific for a given individual tissue. Hence, blood flows are distributed between multiple tissues, each with a specific optimum relationship between the rate of oxygen delivery (DO2) and oxygen consumption (VO2). Previous work has illustrated that the individual tissue blood flows are adjusted proportionately, where there are variations in metabolic rate and where arterial oxygen content (CaO2) varies. While arterial blood pressure is essential for the provision of a sufficient pressure gradient to drive blood flow, it is applicable throughout the arterial system at any one time. Furthermore, It is regulated independently of the input resistance to individual tissues (local arterioles), since they are regulated locally, that being the means by which the highly specific adequate local requirement for DO2 is ensured. Since total blood flow is the summation of all the individually regulated tissue blood flows cardiac inflow (venous return) amounts to total tissue blood flow and as the heart puts out what it receives cardiac output is therefore determined at the tissues. Hence, regulation of arterial blood pressure is independent of the distributed independent regulation of individual tissues. It is proposed here that mechanical features of arterial blood pressure regulation will depend rather on the balance between blood volume and venous wall tension, determinants of venous pressure. The potential for this explanation is treated in some detail. PMID:26782204

  5. Algorithmic Summaries of Perioperative Blood Pressure Fluctuations.

    Science.gov (United States)

    Toddenroth, Dennis; Ganslandt, Thomas; Drescher, Caroline; Weith, Thomas; Prokosch, Hans-Ulrich; Schuettler, Juergen; Muenster, Tino

    2016-01-01

    Automated perioperative measurements such as cardiovascular monitoring data are commonly compared to established upper and lower thresholds, but could also allow for more complex interpretations. Analyzing such time series in extensive electronic medical records for research purposes may itself require customized automation, so we developed a set of algorithms for quantifying different aspects of temporal fluctuations. We implemented conventional measures of dispersion, summaries of absolute gradients between successive values, and Poincaré plots. We aggregated the severity and duration of hypotensive episodes by calculating the average area under different mean arterial pressure (MAP) thresholds. We applied these methods to 30,452 de-identified MAP series, and analyzed the similarity between alternative indices via hierarchical clustering. To explore the potential utility of these propositional metrics, we computed their statistical association with presumed complications due to cardiovascular instability. We observed that hierarchical clustering reliably segregated features that had been designed to quantify dissimilar aspects. Summaries of temporary hypotension turned out to be significantly increased among patient subgroups with subsequent signs of a complicated recovery. These associations were even stronger for measures that were specifically geared to capturing short-term MAP variability. These observations suggest the potential capability of our proposed algorithms for quantifying heterogeneous aspects of short-term MAP fluctuations. Future research might also target a wider selection of outcomes and other attributes that may be subject to intraoperative variability. PMID:27577440

  6. Impact of systolic blood pressure on visit-to-visit blood pressure variability in middle-aged and elderly people

    Institute of Scientific and Technical Information of China (English)

    陈朔华

    2013-01-01

    Objective To observe the impact of systolic blood pressure(SBP)on visit-to-visit blood pressure variability(BPV) in middle-aged and elderly people.Methods Visit-to-visit BPV was determined in 5440 workers in the

  7. Prognostic significance of exercise blood pressure and heart rate in middle-aged men.

    Science.gov (United States)

    Filipovský, J; Ducimetière, P; Safar, M E

    1992-09-01

    Systolic blood pressure and heart rate measured at rest and during a standardized exercise test were analyzed in the cohort of middle-aged male employees followed-up an average of 17 years in the Paris Prospective Study I. The population sample selected for the analysis included 4,907 men who completed at least 5 minutes of bicycle ergometry, who had no heart disease at entry, and whose resting blood pressure was less than or equal to 180/105 mm Hg. Exercise-induced increase in systolic blood pressure was positively correlated with resting systolic blood pressure (r = 0.104, p less than 0.0001), whereas the correlation of exercise-induced heart rate increase with resting heart rate was negative (r = -0.169, p less than 0.001). Using Cox regression analysis with the inclusion of resting systolic blood pressure and heart rate; exercise-induced elevations of systolic blood pressure and heart rate; and controlling for age, smoking, total cholesterol, body mass index, electrical left ventricular hypertrophy, and sports activities, cardiovascular mortality was found to be associated with the systolic blood pressure increase (p less than 0.05), whereas no association with resting systolic blood pressure was found. Total mortality was predicted by resting systolic blood pressure and its elevation (p less than 0.01 for both) and by resting heart rate (p less than 0.0001). The heart rate increase did not contribute to death prediction. In conclusion, the magnitude of the exercise-induced increase of systolic blood pressure, but not of heart rate, may represent a risk factor for death from cardiovascular as well as noncardiovascular causes, independently of resting blood pressure and heart rate. PMID:1387630

  8. Measurement of fast transient pressures

    International Nuclear Information System (INIS)

    The accuracy, reliability and sensitivity of a pressure transducers define its principal static characteristics. When the quantity measured varies with time, the measurement carries a dynamic error and a delay depending on the frequency of this variation. Hence, when fast pressure changes in a fluid have to be determined, different kinds of pressure transducers can be used depending on their inherent dynamic characteristics which must be compared with those of the transient phenomenon to be analysed. The text describes the pressure transducers generally employed in industry for analysing such phenomenon and gives two practical applications developed in the EDF: the first submits the measurements and results of pump cavitation tests carried out at the Vitry II EDF power station; the second deals with hammer blows particularly noticed in nuclear power stations and required the use of transducers of exceptionally high performance such as strain gauge transducers and piezoelectric transducers (response time within 1m sec.)

  9. Pressure Measurement during Penetration Experiments

    Science.gov (United States)

    Krause, C.; Demming, J.; Flecht, T.; Heller, S.

    2014-04-01

    Penetration experiments are common tools for the investigation of physical surface properties. Additionally penetration experiments will find several applications in exploration missions in the near future. A penetration test stand has been flown for the investigation of penetration force reduction under reduced gravity in the 2nd Joint European Partial-G Parabolic Flight Campaign (JEPPF-2) of ESA, CNES and DLR [1]. The main contribution to the bearing resistance of a soil is combined of shaft and base resistance. During the penetration the grains of the granular material will be squeezed into the surrounding material. The penetration will cause a change in the pressure distribution inside the surrounding soil [2],[3]. An experimental setup has been designed and built for understanding and measurement of this induced pressure distribution. In the last year the parabolic flight test stand has been further developed for the measurement of pressure during the penetration process. The main part of the experiments stayed the same with a steel rod penetration into a sample cell measuring the penetration force and recording it in relation to the depth. The sample cell is equipped with a supporting sieving mechanism for sample preparation. The pressure sensors are mounted at the sample cell. During the last test campaigns the principle of measurement has been investigated and first measurements have been performed. In the presentation the measurement principle will be shown and its implementation into the parabolic flight setup. Pressure measurement results on ground tests of different penetrator and tip configurations will be presented.

  10. Graded associations between cardiorespiratory fitness, fatness, and blood pressure in children and adolescents

    DEFF Research Database (Denmark)

    Klasson-Heggebø, L.; Andersen, Lars Bo; Wennlöf, A.H.;

    2006-01-01

    Objective: To measure the graded relation between cardiorespiratory fitness and sum of skinfolds, waist circumference, and blood pressure in children and adolescents participating in the European youth heart study. Methods: The participants were 4072 children and adolescents (aged 9 and 15) from...... Denmark, Portugal, Estonia, and Norway. Cardiorespiratory fitness was indirectly determined using a maximal ergometer cycle test. The sum of four skinfolds, waist circumference, and blood pressure were assessed with a standardised protocol. Linear regression analysis was used to test the graded relation.......09-0.26 for the different sexes and age groups). Systolic and diastolic blood pressure also showed a curvilinear relation with cardiorespiratory fitness, and fitness explained 2% of the variance in systolic blood pressure. The difference in systolic blood pressure between the least and most fit was 6 mm Hg...

  11. Direct blood pressure monitoring in laboratory rodents via implantable radio telemetry.

    Science.gov (United States)

    Huetteman, Daniel A; Bogie, Heather

    2009-01-01

    The ability to monitor and record precise blood pressure fluctuations in research animals is vital to research for human hypertension. Direct measurement of blood pressure via implantable radio telemetry devices is the preferred method for automatic collection of chronic, continuous blood pressure data. Two surgical techniques are described for instrumenting the two most commonly used laboratory rodent species with radiotelemetry devices. The basic rat procedure involves advancing a blood pressure catheter into the abdominal aorta and placing a radio transmitting device in the peritoneal cavity. The mouse technique involves advancing a thin, flexible catheter from the left carotid artery into the aortic arch and placing the telemetry device under the skin along the animal's flank. Both procedures yield a chronically instrumented model to provide accurate blood pressure data from an unrestrained animal in its home cage. PMID:19763922

  12. Ambulatory Blood Pressure Monitoring-Derived Short-Term Blood Pressure Variability in Primary Aldosteronism.

    Science.gov (United States)

    Grillo, Andrea; Bernardi, Stella; Rebellato, Andrea; Fabris, Bruno; Bardelli, Moreno; Burrello, Jacopo; Rabbia, Franco; Veglio, Franco; Fallo, Francesco; Carretta, Renzo

    2015-08-01

    The aim of this study was to investigate the short-term blood pressure (BP) variability (BPV) derived from ambulatory blood pressure monitoring (ABPM) in patients with primary aldosteronism (PA), either idiopathic hyperaldosteronism (IHA) or aldosterone-producing adenoma (APA), in comparison with patients with essential hypertension (EH) and normotensive (NT) controls. Thirty patients with PA (16 with IHA and 14 with APA), 30 patients with EH, and 30 NT controls, matched for sex, age, body mass index, and antihypertensive therapy, were studied. The standard deviation (SD) of 24-hour, daytime, and nighttime BP; 24-hour weighted SD of BP; and 24-hour BP average real variability were not different between patients with PA and those with EH (P=not significant). All BPV indices were higher in patients with PA, either IHA or APA subtypes, and patients with EH, compared with NT controls (P<.001 to P<.05). ABPM-derived short-term BPV is increased in patients with PA, and it may represent an additional cardiovascular risk factor in this disease. The role of aldosterone excess in BPV has to be clarified. PMID:25880017

  13. Correlation Between Fasting Blood Sugar and Resting Blood Pressure in Teachers Residing in Shiraz, Iran 2009

    Directory of Open Access Journals (Sweden)

    K Aghasadeghi

    2011-03-01

    Full Text Available Background: Coronary Artery Disease (CAD is the major cause ofmorbidity and mortality. The knowledge about correlation between the differentrisk factors of CAD provides valuable information for prediction and preventionof the disease in a specific population.The aim of this study was to evaluatethe correlation between fasting blood sugar (FBS and resting blood pressure inteachers residing in Shiraz, IranMethods: A total of 3115 teachers from different educational centers ofShiraz, Iran were interviewed in this cross sectional study. The data obtainedcomprised demographic information including age, sex, and history ofhypertension (HTN, diabetes mellitus (DM, and current use of medications.Other parameters measured were height, weight, fasting blood sugar (FBS andresting blood pressure (BP as well as calculating the body mass index (BMI.Results: Out of all the cases studied, undiagnosed and/or untreated casesof diabetes and hypertension were 1.5% and 15.2% respectively. FBS was higher inthe elderly and in cases with higher BMI, but without any significant differencein relation to sex. The prevalence of HTN was higher in males, in older casesand in those with higher BMI. A significant relationship was observed betweenFBS and resting BP in hypertensive and prehypertensive groups (P < 0.001 ascompared to normotensive subjects.Conclusion: There was a significant correlation between FBS and restingBP in hypertensive and prehypertensive teachers residing in Shiraz,Iran. Theprevalence of neglected DM and HTN in this population was high enough to warrantregular screening.

  14. Skin necrosis in a critically ill patient due to a blood pressure cuff

    Directory of Open Access Journals (Sweden)

    Devbhandari Mohan

    2006-01-01

    Full Text Available The non-invasive method of blood pressure measurement is regarded as a safe procedure and the reports of any serious complications are rare. We report a unique case of extensive skin necrosis due to an intermittently inflating blood pressure cuff in a 65-year-old critically ill lady following a third time redo mitral valve surgery. A brief review of the literature on complications associated with noninvasive method of measurement of blood pressure is presented along with possible mechanisms of skin injury and ways to avoid it.

  15. Effect of citicoline on blood pressure variability

    Directory of Open Access Journals (Sweden)

    O. D. Ostroumova

    2014-01-01

    Full Text Available The authors give the results of their investigation dealing with citicoline therapy in patients with hypertension and cognitive impairments.Objective: to determine the efficiency of citicoline therapy on the level and variability of both systolic and diastolic blood pressures (BP (SBP and DBP.Patients and methods. The investigation covered 60 patients with Stage II hypertension and a goal BP of < 140/90 mm Hg within ≥3 months before their inclusion. The patients were randomized into 2 groups: 30 patients in the study group were assigned to receive a cycle of 10 injections of citicoline in a daily dose of 1000 mg dropwise intravenously, then 1000 mg/day orally for as long as 3 months. 30 patients comprised the control group.Results and discussion. 24-hour BP monitoring indicated that during 4-week citicoline therapy there were significant (p<0.05 reductions in average nocturnal SBP (by 4.1±2.24 mm Hg, average daytime (-1.5±0.39 mm Hg and average nighttime (-1.5±0.37 mm Hg BP variabilities; such changes were not found in the control group. In the study group, normal daytime SBP variability at baseline (≤15 mm Hg was seen in 15 (50% patients; that after citicoline treatment was in 21 (70%; in the control group, this was in 15 (50% and 14 (46.7% patients before and after 4-week therapy, respectively. In the study group, normal nocturnal SBP variability at baseline (≤ 15 mm Hg was seen in 15 (50% patients; that after citicoline treatment was in 23 (76.7%; in the control group, this was in 15 (50% and 16 (53.3% patients, respectively.Twenty-one (70% patients in each group had baseline normal daytime DBP variability (<14 mm Hg; following 4 weeks of treatment, the number of patients with normal daytime DBP variability remained unchanged in the control group and that increased by one patient (n = 22 (73.3% in the citicoline group. Normal nocturnal DBP variability at baseline (<12 mm Hg was observed in 19 (63.3% patients in each group

  16. Rarefaction and blood pressure in systemic and pulmonary arteries.

    Science.gov (United States)

    Olufsen, Mette S; Hill, N A; Vaughan, Gareth D A; Sainsbury, Christopher; Johnson, Martin

    2012-08-01

    The effects of vascular rarefaction (the loss of small arteries) on the circulation of blood are studied using a multiscale mathematical model that can predict blood flow and pressure in the systemic and pulmonary arteries. We augmented a model originally developed for the systemic arteries (Olufsen et al. 1998, 1999, 2000, 2004) to (a) predict flow and pressure in the pulmonary arteries, and (b) predict pressure propagation along the small arteries in the vascular beds. The systemic and pulmonary arteries are modelled as separate, bifurcating trees of compliant and tapering vessels. Each tree is divided into two parts representing the `large' and `small' arteries. Blood flow and pressure in the large arteries are predicted using a nonlinear cross-sectional area-averaged model for a Newtonian fluid in an elastic tube with inflow obtained from magnetic resonance measurements. Each terminal vessel within the network of the large arteries is coupled to a vascular bed of small `resistance' arteries, which are modelled as asymmetric structured trees with specified area and asymmetry ratios between the parent and daughter arteries. For the systemic circulation, each structured tree represents a specific vascular bed corresponding to major organs and limbs. For the pulmonary circulation, there are four vascular beds supplied by the interlobar arteries. This manuscript presents the first theoretical calculations of the propagation of the pressure and flow waves along systemic and pulmonary large and small arteries. Results for all networks were in agreement with published observations. Two studies were done with this model. First, we showed how rarefaction can be modelled by pruning the tree of arteries in the microvascular system. This was done by modulating parameters used for designing the structured trees. Results showed that rarefaction leads to increased mean and decreased pulse pressure in the large arteries. Second, we investigated the impact of decreasing vessel

  17. Characteristic of Ambulatory Blood Pressure in Normotensive Subjects With Type 2 Diabetes Mellitus

    Institute of Scientific and Technical Information of China (English)

    Chen Xiaochao; Xu Mingtong; Kong Minyi; Xue Shengneng

    2005-01-01

    Objectives To observe the characteristic of ambulatory blood pressure monitoring in normotensive diabetic subjects with normoalbuminuria or microalbuminuria. Methods Fifty-two normotensive patients with type 2 diabetes received ambulatory blood pressure monitoring were divided into normoalbuminuric and microalbuminuric groups according to their albumin excretion rate, the other 28 normotensive subjects without diabetes were contributed as control group. Ambulatory blood pressure monitoring was performed on a working day and measurement of blood pressure circadian rhythm was analyzed. Results Normotensive microalbuminuric diabetic patients had higher night-time systolic blood pressure and more blood pressure burden than normotensive normoalbuminuric diabetic patients. Additionally, the microalbuminuric patients had a higher frequency of non-dippers than normoalbuminuric ones, although they were all normotensive. Compared to the normotensive non-diabetic control subjects, the nighttime systolic blood pressure and frequency of nondippers of the normoalbuminuric diabetic patients were significantly higher. Conclusions Intensive attention should be paid in control of blood pressure in diabetic patients to prevent and limit damage of target organ including kidney, even in those normotensive subjects.

  18. Influence of genetic variance on sodium sensitivity of blood pressure.

    Science.gov (United States)

    Luft, F C; Miller, J Z; Weinberger, M H; Grim, C E; Daugherty, S A; Christian, J C

    1987-02-01

    To examine the effect of genetic variance on blood pressure, sodium homeostasis, and its regulatory determinants, we studied 37 pairs of monozygotic twins and 18 pairs of dizygotic twins under conditions of volume expansion and contraction. We found that, in addition to blood pressure and body size, sodium excretion in response to provocative maneuvers, glomerular filtration rate, the renin-angiotensin system, and the sympathetic nervous system are influenced by genetic variance. To elucidate the interaction of genetic factors and an environmental influence, namely, salt intake, we restricted dietary sodium in 44 families of twin children. In addition to a modest decrease in blood pressure, we found heterogeneous responses in blood pressure indicative of sodium sensitivity and resistance which were normally distributed. Strong parent-offspring resemblances were found in baseline blood pressures which persisted when adjustments were made for age and weight. Further, mother-offspring resemblances were observed in the change in blood pressure with sodium restriction. We conclude that the control of sodium homeostasis is heritable and that the change in blood pressure with sodium restriction is familial as well. These data speak to the interaction between the genetic susceptibility to hypertension and environmental influences which may result in its expression. PMID:3553721

  19. What Blood Pressure Goal in Type-2 Diabetes?

    Directory of Open Access Journals (Sweden)

    Nilsson PM

    2011-01-01

    Full Text Available Hypertension in diabetes is a wellknown risk factor for cardiovascular diseases that should be taken seriously. Observational studies have shown a more or less linear relationship between systolic blood pressure levels and risk, but this does not correspond with the outcome results of intervention trials to lower blood pressure. In fact, tight blood pressure control has only been shown to be of general benefit in the range of 130–135 mmHg systolic blood pressure, but not below except for stroke prevention. On the other hand, there might even exist an increased risk for coronary heart disease events and cardiovascular mortality at lower ranges based on data from observational studies. This fact, in combination with the increased costs and risk of serious adverse events, cautions clinicians not to lower systolic blood pressure too much in susceptible patients with longer diabetes duration, more comorbidities, and in older age groups. However, we should not lose sight of the challenge that still around half of all patients with type-2 diabetes are not even below the desired minimum goal of 140 mmHg systolic blood pressure. This calls for improved actions to control blood pressure as part of a general strategy to counteract all cardiovascular risk factors in patients with type-2 diabetes. The higher the risk, the more ambitious should be the approach to screen, detect, treat, and monitor these risk factors.

  20. Elevated blood pressure in offspring of rats exposed to diverse chemicals during pregnancy

    Science.gov (United States)

    Adverse intrauterine environments are associated with increased risk of later disease, including cardiovascular disease and hypertension. As a potential bioindicator of such an adverse environment, we measured blood pressure (BP), renal nephron endowment, renal glucocorticoid rec...

  1. Blood Pressure Monitoring for the Anesthesiologist: A Practical Review.

    Science.gov (United States)

    Bartels, Karsten; Esper, Stephen A; Thiele, Robert H

    2016-06-01

    Periodic, quantitative measurement of blood pressure (BP) in humans, predating the era of evidence-based medicine by over a century, is a component of the American Society of Anesthesiologists standards for basic anesthetic monitoring and is a staple of anesthetic management worldwide. Adherence to traditional BP parameters complicates the ability of investigators to determine whether particular BP ranges confer any clinical benefits. The BP waveform is a complex amalgamation of both antegrade and retrograde (reflected) pressure waves and is affected by vascular compliance, distance from the left ventricle, and the 3D structure of the vascular tree. Although oscillometry is the standard method of measuring BP semicontinuously in anesthetized patients and is the primary form of measurement in >80% of general anesthetics, major shortcomings of oscillometry are its poor performance at the extremes and its lack of information concerning BP waveform. Although arterial catheterization remains the gold standard for accurate BP measurement, 2 classes of devices have been developed to noninvasively measure the BP waveform continuously, including tonometric and volume clamp devices. Described in terms of a feedback loop, control of BP requires measurement, an algorithm (usually human), and an intervention. This narrative review article discusses the details of BP measurement and the advantages and disadvantages of both noninvasive and invasive monitoring, as well as the principles and algorithms associated with each technique. PMID:27195632

  2. BiSpectral Index (BIS monitoring may detect critical hypotension before automated non-invasive blood pressure (NIBP measurement during general anaesthesia; a case report. [v1; ref status: indexed, http://f1000r.es/2oi

    Directory of Open Access Journals (Sweden)

    Matthew M. J. Smith

    2014-01-01

    Full Text Available A patient undergoing general anaesthesia for neurosurgery exhibited an unexpected sudden decrease in the BiSpectral Index (BIS value to near-zero. This prompted the detection of profound hypotension using non-invasive blood pressure (NIBP measurement and expedited urgent assessment and treatment, with the patient making a full recovery. Widely regarded as a ‘depth of anaesthesia’ monitor, this case demonstrates the potential extra clinical benefit BIS may have in the detection of critical incidents such as anaphylaxis during general anaesthesia.

  3. [Patterns of blood pressure and pulse frequency in infants during Vojta therapy].

    Science.gov (United States)

    Beetz, R; Jüngst, B K

    1983-10-01

    In twenty infants aged seven weeks on average blood pressure and pulse frequency were measured during physiotherapy according to Vojta. At one of the exercises ("reflex reversion") blood pressure increased at an average of 60 mm Hg compared with the basic value under rest conditions. At another exercise ("reflex supporting") blood pressure reached about 52 mm Hg higher values as under rest conditions. The pulse frequency, however, showed a less impressive increase: it corresponded approximately to the value measured during crying. As probable causes for the increase of blood pressure are discussed: sustained muscle contractions, varied intrathoracal pressure conditions, and the emotional irritations of the infants. In infants with cardiovascular disease the increased strain during physiotherapy according to Vojta should be taken into account as an additional risk. PMID:6646143

  4. An instantaneous blood pressure measuring system at the wrist based on chip microprocessor%基于单片机控制的血压连续检测系统

    Institute of Scientific and Technical Information of China (English)

    宋义林; 李勇; 高树枚; 张扬; 祁林; 刘琳

    2013-01-01

    Objective In order to achieve the early detection, early diagnosis and early treatment of hypertension, an instantaneous blood pressure measuring system at the wrist is developed based on the volume-compensation method and PIC microcontroller in this paper. Methods The radial artery at wrist is as the object of detection, a local pressurizing cuff and a new type electro-pneumatic converter are used to realize a portable detection system with continuity and highly accuracy. The comparative test between this system and the electronic blood-pressure meter ( EBM ) is carried out to evaluate the system accuracy. Results The local pressurizing cuff compresses the radial artery effectively and safely, and the electric pneumatic converter with good frequency characteristic is suitable for the control of instantaneous pressure in the cuff. The results obtained from this system using the volume-oscillometric method and those from the electronic blood-pressure meter are well correlated. In addition,the characteristics of the system to measure instantaneous blood pressure are good not only in rest condition,but also with respiratory interference. Conclusions The system is capable of measuring instantaneous blood pressure at radial artery non-invasively.%目的 为实现高血压症的早期发现、早期诊断和早期治疗,笔者开发了基于容积补偿法和单片机控制的手腕式无创性血压连续检测系统.方法 本系统以手腕处的桡骨动脉为检测对象,采用局部加压式袖带和新型电空变换器,并通过单片机的软硬件控制,实现了便携式、连续性和高精度检测系统的研发.同时,实验评价了系统的检测性能,与电子血压计检测装置进行了检测精度的对比实验.结果 局部加压式袖带可以有效压迫桡骨动脉而不产生末梢血管的淤血,新型电空变换器具有良好的频率特性并实现袖带的瞬时压力控制.本系统与同时利用电子血压计测得的血压

  5. Specific Blood Pressure Targets for Patients With Diabetic Nephropathy?

    Science.gov (United States)

    Grassi, Guido; Mancia, Giuseppe; Nilsson, Peter M

    2016-08-01

    Diabetic nephropathy represents a condition frequently detected in current clinical practice characterized by a very high cardiovascular risk profile. Blood pressure reduction via antihypertension drug treatment represents a therapeutic approach capable of exerting favorable effects on renal and cardiovascular outcomes. The purpose of this article is to review the current literature and results of key clinical trials pertaining to blood pressure goals of antihypertension treatment in these patients. The pros and cons of a less or a more intensive blood pressure goal in diabetic nephropathy will be discussed, with particular emphasis on the cardiovascular and renal effects of each therapeutic strategy. PMID:27440837

  6. Teaming Up Against High Blood Pressure PSA (:60)

    Centers for Disease Control (CDC) Podcasts

    2012-09-04

    Nearly one-third of American adults have high blood pressure, and more than half of them don’t have it under control. Simply seeing a doctor and taking medications isn’t enough for many people who have high blood pressure. A team-based approach by patients, health care systems, and health care providers is one of the best ways to treat uncontrolled high blood pressure.  Created: 9/4/2012 by Centers for Disease Control and Prevention (CDC).   Date Released: 9/4/2012.

  7. Blood pressure change in Africa: case study from Nigeria.

    Science.gov (United States)

    Kaufman, J S; Owoaje, E E; Rotimi, C N; Cooper, R S

    1999-08-01

    Studies of migrants and comparisons of rural versus urban communities are potentially informative study designs because they allow examination of genetically similar population subgroups exposed to diverse environmental conditions. These designs have been underused in Africa, where recent urbanization has created many situations in which nearby communities of common ethnicity and culture live under different social and economic circumstances. The International Study of Hypertension in Blacks (ICSHIB) conducted several overlapping surveys in Nigeria starting in 1993. These surveys were based primarily in the rural village of Idere and the urban community of Idikan, both inhabited by people defined ethnically as Oyo Yoruba and sharing a common language and culture. Survey teams collected standardized blood pressure and anthropometric measurements, and some study participants provided 24-hr urine samples and questionnaire data on psychosocial stress and social integration. Rural and urban groups differed substantially in blood pressure and related characteristics. Age-adjusted prevalence of hypertension (blood pressure > or = 140/90 mm Hg) for participants aged 25 years and older was 7-8% in Idere and 24-27% in Idikan. The distributions of overweight, sodium/potassium ratio, perceived stress, and social integration scores all contributed to lower hypertension risk in Idere. The effects and interactions of these identified risk factors remain poorly understood, even among people who share a common genetic background, similar diet, and many other lifestyle features. Nonetheless, the rural-urban distinction is sufficiently salient to engender a nearly threefold difference in hypertension prevalence. This disparity in disease prevalence demonstrates the sensitivity of human beings to the environmental determinants of disease and provides a sobering example of the difficulty in identifying subtle genetic effects, which can be easily overwhelmed by small differences in

  8. Pulmonary blood flow distribution measured by radionuclide computed tomography

    International Nuclear Information System (INIS)

    Distributions of pulmonary blood flow per unit lung volume were measured in sitting patients with a radionuclide computed tomography (RCT) by intravenously administered Tc-99m macroaggregates of human serum albumin (MAA). Four different types of distribution were distinguished, among which a group referred as type 2 had a three zonal blood flow distribution as previously reported (West and co-workers, 1964). The pulmonary arterial pressure (Pa) and the venous pressure (Pv) were determined in this group of distribution. These values showed satifactory agreements with the pulmonary artery pressure (Par) and the capillary wedged pressure (Pcw) measured by Swan-Ganz catheter in eighteen supine patients. Those good correlations enable to establish a noninvasive methodology for measurement of pulmonary vascular pressures

  9. STUDY OF EFFECT OF BMI AND WAIST CIRCUMFERENCE ON BLOOD PRESSURE IN FIRST YEAR MEDICAL STUDENTS

    Directory of Open Access Journals (Sweden)

    Pedada

    2015-03-01

    Full Text Available The present study is undertaken to evaluate any association between BMI, WC and Blood pressure and any tendency to develop prehypertension. The study comprises of 100 medical students of NRI medical college, Sangivalasa near Visakhapatnam. It was carried out ongirl students with age of 17 ye ars. Their BMI, WC and Blood pressure were determined. The examination included measurement of weight, height of the student to determine BMI, measurement of waist circumference, and measurement of blood pressure by sphygmomanometer. In the present study t he results are consistent with early clinical studies reporting that there is elevated systolic and diastolic blood pressure with increasing BMI and waist circumference and there is tendency to develop prehypertension in students with higher BMI. Modificat ion of life style factors should be emphasized.

  10. Evaluation of the cerebrovascular pressure reactivity index using non-invasive finapres arterial blood pressure

    International Nuclear Information System (INIS)

    A pressure reactivity index (PRx) can be assessed in patients with continuous monitoring of arterial blood pressure (ABP) and intracranial pressure (ICP) as a moving correlation coefficient between slow fluctuations of these two signals within a low frequency bandwidth. The study aimed to investigate whether the invasive ABP monitoring can be replaced with non-invasive measurement of ABP using a Finapres plethysmograph (fABP) to calculate the fPRx. There is a well-defined group of patients, suffering from hydrocephalus and undergoing CSF pressure monitoring, which may benefit from such a measurement. 41 simultaneous day-by-day monitoring of ICP, ABP and fABP were performed for about 30 min in 10 head injury patients. A Bland–Altman assessment for agreement was used to compare PRx and fPRx calculations. Performance metrics and the McNemary test were used to determine whether fPRx is sensitive enough to distinguish between functioning and disturbed cerebrovascular pressure reactivity. The fPRx correlated with PRx (RSpearman = 0.92, p < 0.001; bias = −0.04; lower and upper limits of agreement: −0.26 and 0.17, respectively). The fPRx distinguished between active and passive reactivity in more than 89% cases. The fPRx can be used with care for assessment of cerebrovascular reactivity in patients for whom invasive ABP measurement is not feasible. The fPRx is sensitive enough to distinguish between functional and deranged reactivity

  11. Evaluation of the cerebrovascular pressure reactivity index using non-invasive finapres arterial blood pressure.

    Science.gov (United States)

    Kasprowicz, M; Schmidt, E; Kim, D J; Haubrich, C; Czosnyka, Z; Smielewski, P; Czosnyka, M

    2010-09-01

    A pressure reactivity index (PRx) can be assessed in patients with continuous monitoring of arterial blood pressure (ABP) and intracranial pressure (ICP) as a moving correlation coefficient between slow fluctuations of these two signals within a low frequency bandwidth. The study aimed to investigate whether the invasive ABP monitoring can be replaced with non-invasive measurement of ABP using a Finapres plethysmograph (fABP) to calculate the fPRx. There is a well-defined group of patients, suffering from hydrocephalus and undergoing CSF pressure monitoring, which may benefit from such a measurement. 41 simultaneous day-by-day monitoring of ICP, ABP and fABP were performed for about 30 min in 10 head injury patients. A Bland-Altman assessment for agreement was used to compare PRx and fPRx calculations. Performance metrics and the McNemary test were used to determine whether fPRx is sensitive enough to distinguish between functioning and disturbed cerebrovascular pressure reactivity. The fPRx correlated with PRx (R(Spearman) = 0.92, p agreement: -0.26 and 0.17, respectively). The fPRx distinguished between active and passive reactivity in more than 89% cases. The fPRx can be used with care for assessment of cerebrovascular reactivity in patients for whom invasive ABP measurement is not feasible. The fPRx is sensitive enough to distinguish between functional and deranged reactivity. PMID:20664157

  12. Creatine kinase activity is associated with blood pressure

    NARCIS (Netherlands)

    L.M. Brewster; G. Mairuhu; N.R. Bindraban; R.P. Koopmans; J.F. Clark; G.A. van Montfrans

    2006-01-01

    Background - We previously hypothesized that high activity of creatine kinase, the central regulatory enzyme of energy metabolism, facilitates the development of high blood pressure. Creatine kinase rapidly provides adenosine triphosphate to highly energy-demanding processes, including cardiovascula

  13. High Blood Pressure in Pregnancy - Multiple Languages: MedlinePlus

    Science.gov (United States)

    ... trudnoći - Bosanski (Bosnian) Bilingual PDF Health Information Translations Chinese - Simplified (简体中文) High Blood Pressure in Pregnancy 孕期高血压 - 简体中文 (Chinese - Simplified) Bilingual PDF Health Information ...

  14. More Support for Aggressive Blood Pressure Treatment for Elderly

    Science.gov (United States)

    ... More Support for Aggressive Blood Pressure Treatment for Elderly Latest findings from national trial show it lowers ... risk of heart disease -- even if they're elderly or have already had heart problems, new research ...

  15. High Blood Pressure, Afib and Your Risk of Stroke

    Science.gov (United States)

    ... prescribed if you have high blood pressure or atrial fibrillation . Stroke prevention is often the focus of doctor-patient conversations in atrial fibrillation, Dr. Sacco said. But for people with high ...

  16. Study of blood pressure and blood sugar levels in adolescence and comparison with body mass index

    Directory of Open Access Journals (Sweden)

    Ashwin Borade

    2011-01-01

    Full Text Available Background: Worldwide prevalence of overweight and obesity is increasing and its consequences prompted the WHO to designate obesity as a global epidemic in 2002. Being overweight is a risk factor for significant illness, especially diabetes and hypertension in adult life. Objectives : To study the blood pressure and blood sugar levels and lifestyle parameters in adolescence and comparison with body mass index. Materials and Methods: In a prospective case control study, out of the 1000 screened, a total of 200 adolescents were considered out of which 100 were with high body mass index (BMI and the other 100 were with normal BMI. Height, weight, BMI, waist hip ratio (WHR, blood pressure (BP, BSL, and associated risk factors like physical activity, fast food consumption, and computer/television watching were measured and screened. Results and Observations: 109 (54.5% males and 91 (45.5% females were included. Maximum number [90 (45%] of adolescents screened were in the age group of 17-19 years, while 54 (27% and 56 (28% adolescents were in the age group of 10-13 years and 14-16 years, respectively. According to CDC charts 2000, prevalence of overweight was 24% which was double when compared to WHO charts 2007. There was significant difference in prevalence of obesity; according to CDC chart it was 26%, whereas according to WHO chart it was 39%. The difference in blood pressures between cases and controls as per both CDC and WHO charts was found to be statistically significant (P 0.05 with BMI. Conclusion: The adolescents seem to have become heavier owing to environmental influences on growth patterns. So, a consideration should be given to shift the cut-offs for overweight and obesity to higher BMI percentiles if recent growth charts are to be followed. Adolescents with a BMI above the 95 >th percentile (obese are most likely to have obesity-related health risks.

  17. The correlation between serum leptin and blood pressure after exposure to noise at work

    Directory of Open Access Journals (Sweden)

    Muayad S Rahma

    2013-01-01

    Full Text Available Several epidemiologic studies have reported that exposure to noise is associated with cardiovascular disease. The increased body weight is often associated with metabolic as well as increased blood pressure. The aim of this study is to investigate the correlation between the elevation of blood pressure and serum leptin hormones due to the effects of noise in the work place. A total of 80 volunteer males where included in this study with an age range between of 20 and 45 years, they were divided in two groups equally, the 1 st group were exposed to noise in the workplace while the 2 nd group were not. The individual noise exposure was determined by using a sound level meter. The range of noise was 80-100 dBA. Body Mass Index was also taken for each individual by a standard measure, blood pressure was measured by OMRON sphygmomanometer and serum leptin was measured through venous blood sample analysis enzyme linked immunosorbent assay. Spearman rank order correlation was used to examine the correlations between Blood pressure value (Systolic, Diastolic and Leptin. All the relationships between parameters showed a positive correlation. Systolic and diastolic blood pressure values had a significant correlation to leptin hormone level in comparison to the control. There was a significant relation between leptin and blood pressure. leptin effects on the sympathetic nervous system may provide a partial explanation. Therefore, Leptin might have diverse cardiovascular actions.

  18. Low dose spironolactone reduces blood pressure in patients with resistant hypertension and type 2 diabetes mellitus

    DEFF Research Database (Denmark)

    Stolzenburg Oxlund, Christina; Henriksen, J. E.; Tarnow, L.;

    2013-01-01

    Background:The increased risk of cardiovascular morbidity and mortality associated with arterial hypertension is particularly pronounced in patients with type 2 diabetes mellitus. Blood pressure control is, therefore, decisively important but often not sufficiently achieved.Objective:The primary...... excretion as well as adverse effects.Methods:In a multicentre, double-blind, randomized, placebo-controlled study 119 patients with blood pressure at or above 130/80mmHg despite triple antihypertensive therapy were included. One tablet of 25mg spironolactone or placebo was added to previous treatment and...... increased to two if blood pressure below 130/80mmHg was not achieved after 4 weeks. Blood pressure was measured by ambulatory monitoring at baseline and after 16 weeks.Results:The study was completed by 112 patients, 57 randomized to spironolactone and 55 to placebo. Average daytime placebo-corrected blood...

  19. Pediatric Blood Pressure and Adult Preclinical Markers of Cardiovascular Disease

    OpenAIRE

    Magnussen, Costan G.; Kylie J. Smith

    2016-01-01

    A high blood pressure level in adults is considered the single most important modifiable risk factor for global disease burden, especially those of cardiovascular (CV) origin such as stroke and ischemic heart disease. Because blood pressure levels have been shown to persist from childhood to adulthood, elevations in pediatric levels have been hypothesized to lead to increased CV burden in adulthood and, as such, might provide a window in the life course where primordial and primary prevention...

  20. Blood Pressure Level Amongst Lactovegetarian And Non-Vegetarian Males

    OpenAIRE

    Jain B K; Jain S C

    1999-01-01

    Research Question: Is the relative risk for the development of hypertension more among non vegetarians than lacto vegetarians? Objectives: To compare the arterial blood pressure between lacto vegetarian and non-vegetarian males of 30 years and above. Design: Cross sectional study. Setting: In two different areas of walled city of Delhi. Study Variables: Blood pressure. Statistical analysis: Quetelet Index, t-test, z-test, x2-test, Relative risk