WorldWideScience

Sample records for cat middle ear

  1. Middle Ear Infections (For Parents)

    Science.gov (United States)

    ... Story" 5 Things to Know About Zika & Pregnancy Middle Ear Infections KidsHealth > For Parents > Middle Ear Infections ... eventually leading to an ear infection. continue About Middle Ear Infections Inflammation in the middle ear area ...

  2. Middle ear infection (image)

    Science.gov (United States)

    A middle ear infection is also known as otitis media. It is one of the most common of childhood infections. With this illness, the middle ear becomes red, swollen, and inflamed because of bacteria ...

  3. Middle Ear Infections

    Science.gov (United States)

    ... Issues Listen Español Text Size Email Print Share Middle Ear Infections Page Content Article Body What are ... serious illness. What if a child with a middle ear infection is in great pain and discomfort? ...

  4. Middle ear infection (otitis media) (image)

    Science.gov (United States)

    ... is an inflammation and/or infection of the middle ear. Acute otitis media (acute ear infection) occurs ... or viral infection of the fluid of the middle ear, which causes production of fluid or pus. ...

  5. Reconstruction of middle ear malformations

    OpenAIRE

    Schwager, Konrad

    2008-01-01

    Malformations of the middle ear are classified as minor and major malformations. Minor malformations appear with regular external auditory canal, tympanic membrane and aerated middle ear space. The conducting hearing loss is due to fixation or interruption of the ossicular chain. The treatment is surgical, following the rules of ossiculoplasty and stapes surgery. In major malformations (congenital aural atresia) there is no external auditory canal and a deformed or missing pinna. The mastoid ...

  6. Reconstruction of middle ear malformations

    Directory of Open Access Journals (Sweden)

    Schwager, Konrad

    2007-01-01

    Full Text Available Malformations of the middle ear are classified as minor and major malformations. Minor malformations appear with regular external auditory canal, tympanic membrane and aerated middle ear space. The conducting hearing loss is due to fixation or interruption of the ossicular chain. The treatment is surgical, following the rules of ossiculoplasty and stapes surgery. In major malformations (congenital aural atresia there is no external auditory canal and a deformed or missing pinna. The mastoid and the middle ear space may be underdevelopped, the ossicular chain is dysplastic. Surgical therapy is possible in patients with good aeration of the temporal bone, existing windows, a near normal positioned facial nerve and a mobile ossicular chain. Plastic and reconstructive surgery of the pinna should proceed the reconstruction of the external auditory canal and middle ear. In cases of good prognosis unilateral aural atresia can be approached already in childhood. In patients with high risk of surgical failure, bone anchored hearing aids are the treatment of choice. Recent reports of implantable hearing devices may be discussed as an alternative treatment for selected patients.

  7. Carcinoid tumour of the middle ear

    LENUS (Irish Health Repository)

    Baig, Salman

    2012-09-01

    A case of middle ear mass in a young female from Ireland is described, who presented with left ear hearing loss and intermittent bloody discharge from the same ear. Examination under microscope revealed occlusive polyp in the left ear and a biopsy had been taken under general anaesthesia. Histopathology report described an adenoma \\/ carcinoid tumour of the middle ear confirmed by positive immunohistochemical staining. CT temporal bones revealed the extension of the disease. The patient underwent left tympanotomy and excision of the tumour. In general, these tumours are regarded as benign but may be mistaken for adenocarcinomas because of their histological heterogenecity.

  8. Radiation induced carcinoma of the middle ear

    International Nuclear Information System (INIS)

    Radiation induced carcinoma of the middle ear is rare. Only four cases have been reported; an additional case is now described. The treatment approach for radiation induced carcinoma of the middle ear has not yet been established. Radiation therapy for advanced cases is discussed as an alternative to surgical treatment. Previous reported cases are reviewed

  9. 21 CFR 874.3430 - Middle ear mold.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Middle ear mold. 874.3430 Section 874.3430 Food... DEVICES EAR, NOSE, AND THROAT DEVICES Prosthetic Devices § 874.3430 Middle ear mold. (a) Identification. A middle ear mold is a preformed device that is intended to be implanted to reconstruct the middle...

  10. Compensating for Deviant Middle Ear Pressure in Otoacoustic Emission Measurements, Data, and Comparison to a Middle Ear Model

    NARCIS (Netherlands)

    Hof, Janny R.; de Kleine, Emile; Avan, Paul; Anteunis, Lucien J. C.; Koopmans, Peter J.; van Dijk, Pim

    2012-01-01

    Objective: Deviant middle ear pressure has a negative effect on the forward and backward transmission of stimulus and emissions through the middle ear. Resolving this deviant middle ear pressure is expected to lead to better middle ear transmission and, as a result of this, stronger otoacoustic emis

  11. Virtual endoscopy of the middle ear

    International Nuclear Information System (INIS)

    Virtual endoscopy is a computer-generated simulation of fiberoptic endoscopy, and its application to the study of the middle ear has been recently proposed. The need to represent the middle ear anatomy by means of virtual endoscopy arose from the increased interest of otolarygologists in transtympanic endoscopy. In fact, this imaging method allows the visualization of middle ear anatomy with high detail, but it is evasive and is essentially used for surgical guidance. Virtual endoscopy provides similar perspectives of the tympanic cavity but does not require the tympanic perforation. In the study of the middle ear, specific attention is given to the retroperitoneum. This region contains elevations of the medial wall (pyramidal eminence and ridge, styloid eminence and ridge, subiculum, ponticulus) and depressions (sinus tympani, posterior sinus tympani, facial sinus, fossula of Grivot, oval window fossula), which can be effectively displayed by virtual endoscopy. Virtual endoscopy is foreseen as a useful tool in preoperative management of patients who are candidates for middle ear surgery, since it can predict with high detail the patient's specific anatomy by imaging perspectives familiar to otosurgeons. (orig.)

  12. Prenatal evaluation of the middle ear and diagnosis of middle ear hypoplasia using MRI

    International Nuclear Information System (INIS)

    Analysis of the middle ear with fetal MRI has not been previously reported. To show the contribution of fetal MRI to middle ear imaging. The tympanic cavity was evaluated in 108 fetal cerebral MRI examinations (facial and/or cerebral malformation excluded) and in two cases, one of Treacher Collins syndrome (case 1) and the other of oculo-auriculo-vertebral (OUV) spectrum (case 2) with middle ear hypoplasia identified by MRI at 27 and 36 weeks' gestation, respectively. In all 108 fetuses (mean gestational age 32.5 weeks), the tympanic cavity and T2 hypointensity related to the ossicles were well visualised on both sides. Case 1 had micro/retrognathia and bilateral external ear deformity and case 2 had retrognathism with a left low-set and deformed ear. MRI made it possible to recognize the marked hypoplasia of the tympanic cavity, which was bilateral in case 1 and unilateral in case 2. Both syndromes are characterized by craniofacial abnormalities including middle ear hypoplasia, which cannot be diagnosed with US. The middle ear cavity can be visualized with fetal MRI. We emphasize the use of this imaging modality in the diagnosis of middle ear hypoplasia. (orig.)

  13. Middle ear malformations in identical twins.

    Science.gov (United States)

    Kidowaki, Naoko; Kamitani, Toru; Nakamura, Takashi; Taki, Masakatsu; Sakaguchi, Hirofumi; Suzuki, Toshihiro; Hisa, Yasuo

    2014-06-01

    The majority of the congenital anomalies of middle ear are solitary and a non-hereditary. We report cases of identical twins with congenital incudo-stapedial disconnection. Case 1 was an 8-year-old girl. Hearing impairment was identified at the age of three. She was referred to our university hospital in April 2005. Pure-tone audiogram showed conductive hearing impairments. Computed tomography (CT) revealed the incudo-stapedial disconnections in both ears. The exploratory tympanotomies on the right and left ears were performed in May and July 2005, respectively. The surgical findings showed absence of the long process and presence of the lenticular process of the incus in both ears. After the reconstructions of ossicular chain, the hearing of both ears improved. Case 2 was an 11-year-old girl. The hearing impairment of the right ear was identified in May 2008. She was referred to our university hospital three months later. Pure-tone audiogram showed the conductive hearing impairment in the right ear. CT revealed the incudo-stapedial disconnection in the right ear. The surgery showed the same findings as those of case 1. Anomalies of both cases suggest that the lenticular process of the incus and the stapes originate from a common primordium. PMID:24355584

  14. Passive and active middle ear implants

    Directory of Open Access Journals (Sweden)

    Beutner, Dirk

    2009-01-01

    Full Text Available Besides eradication of chronic middle ear disease, the reconstruction of the sound conduction apparatus is a major goal of modern ear microsurgery. The material of choice in cases of partial ossicular replacement prosthesis is the autogenous ossicle. In the event of more extensive destruction of the ossicular chain diverse alloplastic materials, e.g. metals, ceramics, plastics or composits are used for total reconstruction. Their specialised role in conducting sound energy within a half-open implant bed sets high demands on the biocompatibility as well as the acoustic-mechanic properties of the prosthesis. Recently, sophisticated titanium middle ear implants allowing individual adaptation to anatomical variations are widely used for this procedure. However, despite modern developments, hearing restoration with passive implants often faces its limitations due to tubal-middle-ear dysfunction. Here, implantable hearing aids, successfully used in cases of sensorineural hearing loss, offer a promising alternative. This article reviews the actual state of affairs of passive and active middle ear implants.

  15. Animal Models of Middle Ear Cholesteatoma

    OpenAIRE

    Tomomi Yamamoto-Fukuda; Haruo Takahashi; Takehiko Koji

    2011-01-01

    Middle ear acquired cholesteatoma is a pathological condition associated with otitis media, which may be associated with temporal bone resorption, otorrhea and hearing loss, and occasionally various other complications. Cholesteatoma is characterized by the enhanced proliferation of epithelial cells with aberrant morphologic characteristics. Unfortunately, our understanding of the mechanism underlying its pathogenesis is limited. To investigate its pathogenesis, different animal models have b...

  16. Auditory Brainstem Circuits That Mediate the Middle Ear Muscle Reflex

    OpenAIRE

    Mukerji, Sudeep; Windsor, Alanna Marie; Lee, Daniel J.

    2010-01-01

    The middle ear muscle (MEM) reflex is one of two major descending systems to the auditory periphery. There are two middle ear muscles (MEMs): the stapedius and the tensor tympani. In man, the stapedius contracts in response to intense low frequency acoustic stimuli, exerting forces perpendicular to the stapes superstructure, increasing middle ear impedance and attenuating the intensity of sound energy reaching the inner ear (cochlea). The tensor tympani is believed to contract in response to ...

  17. Effect of anesthetic gas on middle ear fluid.

    Science.gov (United States)

    Tom, L W; Tsao, F; Marsh, R R; Kessler, A; Konkle, D F

    1994-07-01

    Tympanometry was performed before (preoperative) and after (intraoperative) the administration of inhalation anesthesia including nitrous oxide and halothane on 109 children undergoing myringotomy with pressure equalization tube insertion. A total of 213 preoperative tympanograms were compared with their intraoperative counterparts and the presence or absence of middle ear effusion at myringotomy. When preoperative tympanograms were consistent with pneumatized middle ears, intraoperative findings demonstrated a mean middle ear pressure increase of +147 daPa. When preoperative tympanometry suggested middle ear effusion, less than 1% demonstrated intraoperative tympanometric changes and/or findings at surgery that would support anesthesia clearing middle ear effusion. Preoperative tympanometric data were poor predictors of the presence or absence of effusion at myringotomy. The relationship between inhalation anesthetics (i.e., nitrous oxide and halothane) and middle ear fluids, and the reliability of tympanometry to predict middle ear effusion are discussed. PMID:8022245

  18. The Role of Immittance Audiometry in Detecting Middle Ear Disease

    OpenAIRE

    Jacobson, John T.

    1981-01-01

    Immittance audiometry is an objective technique which evaluates middle ear function by three procedures: static immittance, tympanometry, and the measurement of acoustic reflex threshold sensitivity. This article discusses the technique's ability to identify middle ear effusion, the single leading ear disease in children.

  19. Computed tomography findings in middle ear anomaly

    International Nuclear Information System (INIS)

    The efficacy of computed tomography (CT) of the temporal bone was studied in 45 ears with a middle ear anomaly but whose tympanic membranes were normal. The plane of the film was 30 degrees oblique to the orbito-meatal line. Four otorhinolaryngologists made radiological diagnoses of the CT film without having any information about the patients. CT films of 40 normal ears were also evaluated and served as controls. The incudo-stapedial joint (I-S joint) and the stapes were visualized in all control group subjects. The percentage of correct diagnoses was 77.8% for separation of the I-S joint, and 75.6% for fixation of the stapes. The monopedal stapes was not visualized. Fixation of the malleus and the incus could not be diagnosed correctly. Abnormalities in the location of the facial nerve were visualized in a few ears. CT of the temporal bone was clinically useful for differentiating I-S joint separation and fixation of the stapes. (author)

  20. Numerical simulation of the human ear and the dynamic analysis of the middle ear sound transmission

    International Nuclear Information System (INIS)

    Based on the clinical CT of normal right ear, a 3-D ?nite element (FE) model of the human ear consisting of the external ear canal, middle ear(tympanic membrane, ossicular chain, ligaments, tendons), and inner ear (including semicircular canals, vestibular, spiral cochlear)was constructed in this paper. The complicated structures and inner boundary conditions of middle ear were described in this model. Model analysis and acoustic-structure-?uid coupled dynamic frequency response analysis were conducted on the model. The validity of this model was confirmed by comparing the results with published experimental data. The amplitudes and velocities of tympanic membrane and stapes footplate, sound pressure gain across the middle ear, and the cochlear input impedance were derived. Besides, it was concluded that the ear canal can amplify the sound signal in low frequencies.The modes of vibration of middle ear auditory ossicles, oval window and round window have been analysed. This model can well simulate the acoustic behavior with the interaction of external ear, middle ear and inner ear, which can supply more valuable theoretical support for development and improvement of hearing-aid and artificial inner ear.

  1. Penetration of ceftibuten into middle ear fluid.

    OpenAIRE

    Lin, C.; Kumari, P; Perrotta, R J; Reidenberg, B E

    1996-01-01

    The penetration of ceftibuten, an extended-spectrum oral cephalosporin, into middle ear fluid (MEF) was evaluated in pediatric patients during a course of daily oral doses of 9 mg/kg of body weight for 10 days. Plasma and MEF collected at 2, 4, 6, or 12 h after at least 3 days of dosing were analyzed for ceftibuten by a high-pressure liquid chromatography method, and the data were used to calculate pharmacokinetic parameters. Plasma and MEF had almost identical maximum concentrations (Cmax) o...

  2. Ondansetron and dexamethasone in middle ear procedures

    OpenAIRE

    Usmani, Hammad; Quadir, A.; Siddiqui, Rehan Asif; S C Sharma

    2003-01-01

    A randomised, double-blind study was conducted on 90 ASA I & II patients undergoing middle ear surgery to compare the efficacy of ondansetron, dexamethasone and a combination of Ondansett on+dexamethasone for the prevention of postoperative nausea and vomiting. Group I patients received ondansetron (0. 1 mg/kg), group IIpatients received dexamethasone(0.1z mg./Kg) while group III received ondansetron (0.1 mg./kg) + dexamethasone (0.15 mg/kg), 10 minute before induction of general anaesthesia....

  3. Neuroendocrine Adenoma of the Middle Ear: A Rare Histopathological Diagnosis

    Science.gov (United States)

    McGinness, Sam; Coleman, Hedley; Varikatt, Winny; da Cruz, Melville

    2016-01-01

    Neuroendocrine tumours occur throughout the body but are rare in the head and neck region and particularly rare in the middle ear. Clinical findings are often nonspecific and therefore pose a diagnostic challenge. Furthermore, the nomenclature of neuroendocrine tumours of the middle ear is historically controversial. Herein a case is presented of a middle ear adenoma in a 33-year-old patient who presented with otalgia, hearing loss, and facial nerve palsy. A brief discussion is included regarding the histopathological features of middle ear adenomas and seeks to clarify the correct nomenclature for these tumours. PMID:27429819

  4. Applied comparative anatomy of the avian middle ear.

    OpenAIRE

    Mills, R.

    1994-01-01

    The anatomy of the middle ear has been studied in nine species of birds, with particular reference to the structure of the ossicle and its relationship to the tympanic membrane. The morphology of the avian middle ear has been compared to that of the reconstructed human middle ear. Drum to stapes foot plate assemblies created during ossiculoplasty operations differ from the pattern found in the avian middle ear in a number of important respects and this may help to explain why they are often u...

  5. LDV measurement of bird ear vibrations to determine inner ear impedance and middle ear power flow

    Science.gov (United States)

    Muyshondt, Pieter G. G.; Pires, Felipe; Dirckx, Joris J. J.

    2016-06-01

    The mechanical behavior of the middle ear structures in birds and mammals is affected by the fluids in the inner ear (IE) that are present behind the oval window. In this study, the aim was to gather knowledge of the acoustic impedance of the IE in the ostrich, to be able to determine the effect on vibrations and power flow in the single-ossicle bird middle ear for future studies. To determine the IE impedance, vibrations of the ossicle were measured for both the quasi-static and acoustic stimulus frequencies. In the acoustic regime, vibrations were measured with a laser Doppler vibrometer and electromagnetic stimulation of the ossicle. The impedance of the inner ear could be determined by means of a simple RLC model in series, which resulted in a stiffness reactance of KIE = 0.20.1012 Pa/m3, an inertial impedance of MIE = 0.652.106 Pa s2/m3, and a resistance of RIE = 1.57.109 Pa s/m. The measured impedance is found to be considerably smaller than what is found for the human IE.

  6. Drop weld thermal injuries to the middle ear.

    LENUS (Irish Health Repository)

    Keogh, I J

    2009-01-01

    Drop weld injuries to the tympanic membrane and middle ear caused by hot sparks or molten slag are a rare but significant injury. Steel workers and welders who are regularly exposed to flying sparks and molten metal slag are predisposed. This type of transtympanic thermal injury occurs when the slag literally drops into the external auditory canal and burns through the tympanic membrane. A spectrum of severity of injury occurs which includes chronic tympanic membrane perforation, chronic otorrhoea, facial nerve injury and deafness. Chronic tympanic membrane perforation is the most common sequelae and is perhaps one of the most challenging of all perforations to repair The combination of direct thermal injury and foreign body reaction results in continuing or recurrent suppuration. The foreign body reaction is due to the embedding of metal slag in the promontorial mucosa. We present a case of drop weld injury to the left tympanic membrane, resulting in chronic middle ear inflammation, otorrhoea and tympanic perforation. CAT scan clearly demonstrated a metallic promontorial foreign body with localised bone erosion. We emphasise the importance of removing these foreign bodies and recommend a cartilage reinforced underlay tympanoplasty technique to repair these perforations. Transtympanic thermal trauma is a preventable occupational injury, which is best, avoided by earplugs and increased awareness.

  7. CT and MRI of the middle ear

    International Nuclear Information System (INIS)

    High-resolution computed tomography (HRCT) provides excellent contrast between osseous structures, air and soft tissue in conjunction with high spatial resolution. Therefore, thin-section HRCT with bone window setting is the method of choice for the examination of the middle ear structures. The indications are acute and chronic inflammatory changes, cholesteatoma and tumor, the 'postoperative middle ear', and malformations. In most cases, HRCT enables differentiation between inflammatory changes, cholesteatoma, and tumor. The excellent depiction of subtle osseous details enables the identification of erosions of the ossicles or of the bony walls of the mastoid cells, of osseous defects of the tegmen, of the bony labyrinth, and of the tympanic course of the facial canal. In addition, HRCT enables excellent depiction of reconstructions of the ossicles or prosthesis of the ossicles. Although HRCT is the first method of choice, magnetic resonance imaging (MRI) may provide additional information and lead to a more accurte diagnosis in some cases. The is explained by the excellent soft tissue contrast provided by MRI. In addition, MRI offers the possibility of using various pulse sequences and the administration of IV contrast material. Therefore, MRI may allow the differentiation between inflammatory changes, cholesteatoma, and tumor in those cases in which accurate diagnosis cannot be made by HRCT. (orig./AJ)

  8. TREATMENT OF INFLAMMATORY MIDDLE EAR DISEASES WITH EXOGENOUS NITROGEN OXIDE

    OpenAIRE

    Nosova, О.

    2010-01-01

    The article is devoted to the treatment problem of patients with different inflammatory middle ear diseases. Results of studying NO-therapy efficiency in treatment of acute catarrhal middle otitis and acute suppurative and chronic middle otitis are presented as well as those of inflammatory process exacerbation in the trepanation cavity. The outcome obtained allows the assertion of the possibility to significantly increase the treatment efficacy of inflammatory middle ear diseases using NO-th...

  9. Can you hear me now? Understanding vertebrate middle ear development

    OpenAIRE

    Chapman, Susan Caroline

    2011-01-01

    The middle ear is a composite organ formed from all three germ layers and the neural crest. It provides the link between the outside world and the inner ear, where sound is transduced and routed to the brain for processing. Extensive classical and modern studies have described the complex morphology and origin of the middle ear. Non-mammalian vertebrates have a single ossicle, the columella. Mammals have three functionally equivalent ossicles, designated the malleus, incus and stapes. In this...

  10. Magnetic resonance imaging in inflammatory lesions of the middle ear

    Energy Technology Data Exchange (ETDEWEB)

    Tono, Tetsuya; Saku, Kazuaki; Miyanaga, Satoshi; Kano, Kiyo; Morimitsu, Tamotsu; Suzuki, Yukiko.

    1988-05-01

    Eighteen patients with chronic otitis media, middle ear cholesteatoma, and postoperative inflammatory diseases of the middle ear underwent high resolution computerized tomography (CT) and magnetic resonance imaging (MRI) before surgical exploration of the middle ear. Results showed that CT provides higher detail resolution in middle ear structures, but provides limited density resolution in displaying inflammatory soft tissue lesions. By contrast, MRI differentiates among soft tissue lesions such as fluid-filled spaces, granulation tissues, and cholesteatomatous debris. Cholesterin granulomas show a particularly characteristic signal pattern with a very high intensity area in both T1 and T2 weighted images. It is concluded that MRI is useful in differentiating soft tissue density masses when used in conjunction with CT in middle ear inflammatory diseases.

  11. Magnetic resonance imaging in inflammatory lesions of the middle ear

    International Nuclear Information System (INIS)

    Eighteen patients with chronic otitis media, middle ear cholesteatoma, and postoperative inflammatory diseases of the middle ear underwent high resolution computerized tomography (CT) and magnetic resonance imaging (MRI) before surgical exploration of the middle ear. Results showed that CT provides higher detail resolution in middle ear structures, but provides limited density resolution in displaying inflammatory soft tissue lesions. By contrast, MRI differentiates among soft tissue lesions such as fluid-filled spaces, granulation tissues, and cholesteatomatous debris. Cholesterin granulomas show a particularly characteristic signal pattern with a very high intensity area in both T1 and T2 weighted images. It is concluded that MRI is useful in differentiating soft tissue density masses when used in conjunction with CT in middle ear inflammatory diseases. (author)

  12. Aberrant internal carotid artery in the middle ear

    International Nuclear Information System (INIS)

    The knowledge about the aberrant internal carotid artery (ICA) in the middle ear is essential for clinicians, because a misdiagnosis of the aberrant ICA could have serious consequences such as excessive aural bleeding during a middle ear surgery. A 38-year-old woman presented with tinnitus and hearing difficulties of the left ear that had started 5 years ago. During otoscopy, an anteroinferior bluish mass was seen in the tympanic space. Computed tomography and magnetic resonance imaging demonstrated a left-side aberrant ICA with bony dehiscence of the carotid canal in the middle ear and a reduced diameter of the tympanic ICA. Herein we report a case of an aberrant ICA in the middle ear. We also review the literature regarding this important vascular anomaly of the temporal bone which may lead to disastrous surgical complications.

  13. Aberrant internal carotid artery in the middle ear

    Energy Technology Data Exchange (ETDEWEB)

    Roh, Keun Tak; Kang, Hyun Koo [Dept. of Radiology, Seoul Veterans Hospital, Seoul (Korea, Republic of)

    2014-10-15

    The knowledge about the aberrant internal carotid artery (ICA) in the middle ear is essential for clinicians, because a misdiagnosis of the aberrant ICA could have serious consequences such as excessive aural bleeding during a middle ear surgery. A 38-year-old woman presented with tinnitus and hearing difficulties of the left ear that had started 5 years ago. During otoscopy, an anteroinferior bluish mass was seen in the tympanic space. Computed tomography and magnetic resonance imaging demonstrated a left-side aberrant ICA with bony dehiscence of the carotid canal in the middle ear and a reduced diameter of the tympanic ICA. Herein we report a case of an aberrant ICA in the middle ear. We also review the literature regarding this important vascular anomaly of the temporal bone which may lead to disastrous surgical complications.

  14. 3D visualization of middle ear structures

    Science.gov (United States)

    Vogel, Uwe; Schmitt, Thomas

    1998-06-01

    The achievement of volume geometry data from middle ear structures and surrounding components performs a necessary supposition for the finite element simulation of the vibrational and transfer characteristics of the ossicular chain. So far those models base on generalized figures and size data from anatomy textbooks or particular manual and one- or two-dimensional distance measurements of single ossicles, mostly obtained by light microscopy, respectively. Therefore the goal of this study is to create a procedure for complete three-dimensional imaging of real middle ear structures (tympanic membrane, ossicles, ligaments) in vitro or even in vivo. The main problems are their microscopic size with relevant structures from 10 micrometer to 5 mm, representing various tissue properties (bone, soft tissue). Additionally, these structures are surrounded by the temporal bone, the most solid bone of the human body. Generally there exist several established diagnostic tools for medical imaging that could be used for geometry data acquisition, e.g., X-ray computed tomography and magnetic resonance imaging. Basically they image different tissue parameters, either bony structures (ossicles), or soft tissue (tympanic membrane, ligaments). But considering this application those standard techniques allow low spatial resolution only, usually in the 0.5 - 1mm range, at least in one spatial direction. Thus particular structures of the middle ear region could even be missed completely because of their spatial location. In vitro there is a way out by collecting three complete data sets, each distinguished by 90 degree rotation of a cube-shaped temporal bone specimen. That allows high-resolution imaging in three orthogonal planes, which essentially supports the three-dimensional interpolation of the unknown elements, starting from the regularly set elements of the cubic grid with an edge extension given by the original two-dimensional matrix. A different approach represents the

  15. Gain and maximum output of two electromagnetic middle ear implants: are real ear measurements helpful?

    OpenAIRE

    Snik, A.F.M.; Noten, J.F.P.; Cremers, C. W. R. J.

    2004-01-01

    We compared the output of two electronic middle ear implants: the Otologics MET device and the Vibrant Soundbridge device. Both devices were programmed in the linear amplification mode. Aided minus unaided sound pressure levels recorded in the ear canal (objective gain) were compared to unaided minus aided soundfield thresholds (functional gain) in 13 patients with severe sensorineural hearing loss. In addition, input/output characteristics were studied with the help of ear canal measurements...

  16. Imaging of postoperative middle ear cholesteatoma

    International Nuclear Information System (INIS)

    Cholesteatoma is often treated surgically using canal wall-preserving techniques. Clinical and otoscopic diagnosis of residual or recurrent disease after this form of surgery is unreliable and thus radiological imaging is often used prior to mandatory 'second-look' surgery. Imaging needs to be able to differentiate residual or recurrent disease from granulation tissue, inflammatory tissue or fluid within the middle ear cavity and mastoid cavity. High-resolution computed tomography (HRCT), conventional magnetic resonance imaging (MRI), and delayed contrast MRI have all been used in detecting postoperative cholesteatoma. Although delayed contrast MRI performs better than HRCT and conventional MRI, the sensitivities and specificities of these different imaging methods are relatively poor. Diffusion-weighted MRI (DWI and, in particular, non-echo planar DWI) has been shown to have a high sensitivity and specificity for detecting recurrent cholesteatoma. In this review we provide examples of postoperative imaging appearances following cholesteatoma surgery and we review the relevant literature with an emphasis on studies evaluating the diagnostic accuracy of DWI.

  17. Cochlear implantation: strategies to protect the implanted cochlea from middle ear infection.

    Science.gov (United States)

    Jackler, R K; O'Donoghue, G M; Schindler, R A

    1986-01-01

    A cochlear implant for use in children must take into account the high incidence of middle ear infection in this age group. A scala tympani electrode that traverses the middle ear and round window will likely act as a conduit by which infection can spread to the inner ear and potentially to the CNS. In this study an attempt was made to reestablish a separation of the cochlea from the middle ear by developing a seal around the implant at the level of the round window. A series of cats were implanted with simulated cochlear prostheses consisting of either a plain Silastic cylinder, a Silastic cylinder wrapped with autogenous fascia, or a Silastic cylinder with a cuff of bioactive ceramic. Middle ear infection was induced, followed by histologic examination. Bioactive ceramic appears to have some merit as a round window sealing material, while fascia was shown to be of no value. Intracochlear infection, when it did occur, was limited to the basal regions of the cochlea. PMID:3753835

  18. The middle ear immune defense changes with age

    DEFF Research Database (Denmark)

    Nielsen, Michelle Christine; Friis, Morten; Martin-Bertelsen, Tomas;

    2016-01-01

    this study was to analyze the relationship between age and the mucosal immune system in the middle ear. It is hypothesized that genes involved in the middle ear immune system will change with age. A comprehensive assessment of these genetic differences using the techniques of complementary DNA has not...... been performed. Complementary DNA microarray technology was used to identify immune-related genes differentially expressed between the normal middle ear mucosa of young (10 days old) and adult rats (80 days old). Data were analyzed using tools of bioinformatics. A total of 260 age-related genes were......, zeta-chain T-cell receptor-associated protein kinase and linker of activated T-cells, were upregulated in the adult. This study concludes that the normal middle ear immune system changes with age. Genes related to the innate immune system are upregulated in young rats, whereas genes related to the...

  19. CT analysis of 333 cases of congenital malformations of the external and middle ear

    International Nuclear Information System (INIS)

    To analyze the different CT findings of congenital malformations of the external and middle ear, 333 cases including 404 ears with external and middle ear malformations diagnosed by high resolution CT (HRCT) were analysed according to the location and type of the malformation. In 404 ears, there were 364 ears with atresia of external auditory meatus, 40 ears with stenosis of external auditory meatus, 377 ears with malformation of the ossicles, 382 ears with stenosis of tympanum and 333 ears with anterior position of the mastoid segment of the facial canal. HRCT can show the location and type of external and middle ear malformation and provide valuable information for surgery

  20. BASAL CELL CARCINOMA IN MIDDLE EAR: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Shankar

    2015-02-01

    Full Text Available Basal cell carcinoma is a very common skin cancer, it is much more common in fair – skinned individuals with a family history of Basal cell carcinoma and increases closure to the equator or at higher attitude, this tumor is a extremely rarely found in the middle ear, accounts for 45% of all au ricular carcinomas and is more common than squamous cell carcinoma, it is most frequently found in patient between 40 and 60 years of age, sunlight exposure is the most common modifiable risk factor, we are here presenting a case of Basal cell carcinoma in middle ear presented with ear discharge and polyp in external auditory canal and middle ear, treated with radiotherapy

  1. Computed tomography of middle ear cholesteatomas without tympanic membrane perforation

    International Nuclear Information System (INIS)

    The growth of a middle ear cholesteatoma behind a normal tympanic membrane is a rate though possible event. In such cases, CT may provide useful information for diagnosis. The results are presented of a CT study carried out on 14 patients affected with unilateral conductive hearing loss and with normal tympanic membrane. CT allowed the diagnosis of meddle ear cholesteatoma to be made in all cases. All patients were treated with surgery: 8 of them underwent tympanoplasty and 6 explorative tympanotomy. While the diagnosis of cholesteatoma was confirmed in 13 patients, in 1 case tympanosclerosis was diagnosed. CT diagnosis of middle ear cholesteatoma is based on the demonstration of a low-density soft-tissue mass, in association with bone erosion or ossicular dislocation. The author emphasizes the difficulty of a CT diagnosis of cholesteatoma in the patients with middle ear soft-tissue masses in the absence of bone alterations

  2. Prevalence of middle ear disorders in coal miners

    Energy Technology Data Exchange (ETDEWEB)

    Lempert, B.L.; Hopkinson, N.T.; Keith, R.W.; Motl, M.L.; Horine, J.

    1981-06-01

    Results are presented from a study of the prevalence of middle and external ear disorders in coal miners who work underground. The study followed from an earlier NIOSH report (1976) that indicated a possibly large number of otoscopic abnormalities in this population of workers. Otoscopic examinations, pure tone air- and bone-conduction audiometry tests, and impedance tests were administered to 350 underground miners and 150 industrial workers not associated with mining. The study was conducted completely within a hospital otolaryngology/audiology clinic setting. Results of the investigation showed a highly similar prevalence of middle ear and ear canal abnormalities in the miner group and the control group (19 percent). Middle ear abnormalities observed in the miners were judged by the examining otolaryngologists to have preceded their experience in the mines and were not related solely to underground noise exposure or coal dust. Nearly half of the subjects who had an air-bone gap had no middle ear abnormality observable by otoscopic examination. There was substantial agreement between the finding of abnormal otoscopy and abnormal tympanometry. By itself, acoustic reflex was not useful in identifying middle ear disorders, since this reflex may be absent for other reasons, including presence of severe sensorineural hearing loss.

  3. Three-dimensional display of the inner ear and middle ear using bi-ocular stereoscopic observation and multiplex holograms

    International Nuclear Information System (INIS)

    Several methods are routinely used to observe the inner ear and the middle ear. At present, however, some inextricable problems still exist with such methods. The authors obtained precise multidirectional projection images of the inner ear and the middle ear by using computer graphics and reformatted data obtained with high-resolution transaxial CT (section thickness of 1 mm). These images can be processed to allow windowing, enlargement, and edge enhancement, for improved observation of detail. Bi-ocular stereoscopic observation of these images from any direction is possible in addition, three-dimensional display of the inner ear and the middle ear is performed with good success, using multiplex holograms

  4. Dysmorphism of the middle ear: case report.

    Science.gov (United States)

    Solero, P; Ferrara, M; Musto, R; Pira, A; Di Lisi, D

    2005-10-01

    Although there are numerous publications in the literature describing the wide range of diagnosis, classifications and treatment of malformations of the hearing apparatus, even more variations can be found in clinical practice. Indeed, each individual case is unique as far as concerns pathogenesis, clinical course and treatment. The case reported herein describes a 12-year-old boy affected by cranio-facial dysmorphism and monolateral conductive hearing loss in the right ear: followed from radiological diagnosis--carried out to study a malformation of the ear pinna--to surgical treatment. PMID:16602328

  5. Poor Oral Hygiene and Middle Ear Infections: Any Relationship?

    OpenAIRE

    Esra, Eryaman; Banu, Oter Ilhan; Erdinc, Aydin

    2013-01-01

    The purpose of this study is to evaluate the relationship between poor oral hygiene and middle ear infections. 59 children between 3–12 age intervals were included in this study. The ears were examined by microscope. The findings were marked according to Kempthorne clinical scale and tympanograms were performed. For data analysis of dental caries, dft and DMFT indexes were used in accordance with WHO (World Health Organization) criteria for oral health surveys. The oral hygiene status was det...

  6. Zwislocki's model of the middle ear re-visited

    Science.gov (United States)

    Withnell, Robert H.; Fields, Taylor N.

    2015-12-01

    Zwislocki's circuit model of the middle ear [11] has been used, in original or modified form, in subsequent studies modeling the ear [4, 6]. The model includes two eardrum modes of vibration, a shunt for flexible coupling between the incus and stapes, and a single tuned oscillator for ossicular vibration. The contribution of each of these mechanisms was examined by fitting a model of the ear to acoustic input impedance data from healthy human ears. The circuit elements for a non-ossicular eardrum vibration and a flexible coupling between the incus and stapes were found to be detrimental or non-essential for the model-fit-to-data. A single mode of eardrum vibration for sound transmission to the middle ear is consistent with the eardrum acting as an impedance-matching device, with pars-tensa eardrum vibration coupled to the ossicles [1]. A single-tuned oscillator was insufficient to account for the bandwidth of the ear. The frequency response of the ear suggests multiple resonant modes of ossicular vibration.

  7. Differential diagnosis of middle ear inflammatory diseases by MRI findings

    International Nuclear Information System (INIS)

    Although computed tomography can reveal a soft tissue mass in middle ear diseases as an area of increased density, it cannot differentiate cholesteatoma from other inflammatory tissue. We prospectively studied 30 patients with various middle ear inflammatory diseases, including inflammatory granulation tissue, cholesteatoma and cholesterin granuloma with magnetic resonance imaging (MRI) with or without Gd-DTPA enhancement. Cholesteatoma and inflammatory granulation tissue showed intensity ranging from low to high on T1-weighted images and from high to very high on T2-weighted images. However, cholesteatoma showed either no enhancement or ring enhancement on MR imagings with Gd-DTPA, and it could be differentiated from the Gd-DTPA-enhanced inflammatory granulation tissue. Cholesterin granuloma showed very high intensity on both T1 and T2-weighted images. Therefore, MRI with Gd-DTPA is considered to be useful in the differential diagnosis of these middle ear diseases. (auhtor)

  8. Rotation of middle ear ossicles during cetacean development.

    Science.gov (United States)

    Kinkel, M D; Thewissen, J G; Oelschläger, H A

    2001-08-01

    Cetacean middle ears are unique among mammals in that they have an elongated tympanic membrane, a greatly reduced manubrium mallei, and an incudal crus longum that is shorter than the crus breve. Elongation of the tympanic membrane and reduction of the manubrium is thought to be related to an evolutionary rotation of the incus and malleus out of the plane of the tympanic membrane. We examined if rotation also occurs during ontogeny by comparing the middle ears of two species of dolphins (Delphinus delphis, Stenella attenuata) at different stages of development. We observed that: the incus has the body and crural proportions as in terrestrial mammals early in development; the incudomallear complex rotates approximately 90 degrees following ossification; the tympanic membrane is not elongated until relatively late in development. Therefore, some of the unique characteristics of the cetacean middle ear develop as modifications of an initially terrestrial-like morphology. PMID:11466740

  9. Distance Measurement in Middle Ear Surgery using a Telemanipulator

    OpenAIRE

    Maier, Thomas; Strauss, Gero; Bauer, Franz; Grasser, Andreas; Hata, Nobuhiko; Tim C. Lueth

    2011-01-01

    In this article, a new tool for the intraoperative measurement of distances within the middle ear by means of a micromanipulator is presented. The purpose of this work was to offer the surgeon a highly accurate tool for measuring the distances between two points in the 3D operational field. The tool can be useful in various operations; this article focuses, however, on measuring the distance between the stapes footplate and the long process of the incus of the middle ear. This distance is imp...

  10. Dysmorphism of the middle ear: case report

    OpenAIRE

    Solero, P; Ferrara, M; Musto, R.; Pira, A; Di Lisi, D

    2005-01-01

    Although there are numerous publications in the literature describing the wide range of diagnosis, classifications and treatment of malformations of the hearing apparatus, even more variations can be found in clinical practice. Indeed, each individual case is unique as far as concerns pathogenesis, clinical course and treatment. The case reported herein describes a 12-year-old boy affected by cranio-facial dysmorphism and monolateral conductive hearing loss in the right ear: followed from rad...

  11. Imaging evaluation of middle ear cholesteatoma: iconographic essay

    Energy Technology Data Exchange (ETDEWEB)

    Avila, Ana Flavia Assis de; Aburjeli, Bruna de Oliveira Melim; Moreira, Wanderval; Motta, Emilia Guerra Pinto Coelho; Ribeiro, Marcelo Almeida; Diniz, Renata Lopes Furletti Caldeira, E-mail: fauassis@hotmail.com [Hospital Mater Dei, Belo Horizonte, MG (Brazil)

    2013-06-15

    Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications. (author)

  12. Reconstructive Middle Ear Surgery: Techniques to improve hearing

    OpenAIRE

    Ruby, R.R.F.; Ballagh, R.H.

    1992-01-01

    Conductive hearing loss is a common cause of deafness and disability, particularly in children and young adults. This article presents a brief overview of the various methods currently available for reconstructing the tympanic membrane and middle ear ossicular chain, including some comments as to their indications and limitations. Schematic diagrams showing these techniques illustrate the various types of repair described.

  13. [Congenital malformations of the external and middle ear].

    Science.gov (United States)

    Wang, Zhaoyan; Yang, Jun; Wu, Hao

    2013-07-01

    Congenital malformations of the external and middle ear is the common reason of pediatric hearing impairment and cosmic problem. The treatment composes of auricular plastic surgery and auditory reconstruction surgery. The use of BAHA, vibrant sound-bridge and tissue engineering materials can significantly improve the treatment outcomes. PMID:24073571

  14. Imaging evaluation of middle ear cholesteatoma: iconographic essay

    International Nuclear Information System (INIS)

    Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications. (author)

  15. Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology

    OpenAIRE

    Lima, Marco Antônio Rios; Farage, Luciano; Cury, Maria Cristina Lancia; Bahamad, Fayez

    2014-01-01

    Introduction Middle ear barotrauma is the most common side effect of hyperbaric oxygen therapy. Knowledge and understanding of its pathophysiology are crucial for an accurate diagnosis and proper decision making about treatment and prevention. Objective Describe up-to-date information on pathophysiology of middle ear barotrauma after hyperbaric oxygen therapy considering the physiology of pressure variation of the middle ear. Data Synthesis Middle ear barotrauma occurs especially during the c...

  16. Middle ear osteoma causing progressive facial nerve weakness: a case report

    OpenAIRE

    Curtis, Kate; Bance, Manohar; Carter, Michael; Hong, Paul

    2014-01-01

    Introduction Facial nerve weakness is most commonly due to Bell’s palsy or cerebrovascular accidents. Rarely, middle ear tumor presents with facial nerve dysfunction. Case presentation We report a very unusual case of middle ear osteoma in a 49-year-old Caucasian woman causing progressive facial nerve deficit. A subtle middle ear lesion was observed on otoscopy and computed tomographic images demonstrated an osseous middle ear tumor. Complete surgical excision resulted in the partial recovery...

  17. Middle-ear cholesteatoma surgery. The need of individualized therapy

    International Nuclear Information System (INIS)

    The goal of middle-ear cholesteatoma surgery is two-fold- a safe, dry, trouble-free ear and good hearing. No single surgical strategy is optimal in all cases, however, necessitating an individualized approach- and a standard for surgical selection. We reviewed middle-ear ventilation and tympanoplasty techniques. Cholesteatoma recurrence is a major problem following closed tympanoplasty, requiring ventilation created from the mesotympanum to the mastoid cavity and promoting mastoid reaeration. If a ventilation route cannot be constructed postoperatively, open tympanoplasty should be considered. In attic and antrum aeration in preoperative computed tomography (CT), we selected closed tympanoplasty. For such cases without attic and antrum aeration, planned tympanoplasty was selected. In those older than 60 years or with poor Eustachian tube function, open tympanoplasty with or without soft-wall external ear canal reconstruction was selected rather than planned staged tympanoplasty. Postoperative residual cholesteatoma was seen in 19 of 185 ears (10.3%), but no recurrent cholesteatoma. Individual hospital staffs should thus prepare and review a standard individualizing cholesteatoma surgery. (author)

  18. Evolution of the mammalian middle ear: a historical review.

    Science.gov (United States)

    Maier, Wolfgang; Ruf, Irina

    2016-02-01

    Here we present a brief, historical review of research into the mammalian middle ear structures. Most of their essential homologies were established by embryologists, notably including Reichert, during the 19th century. The evolutionary dimension was confirmed by finds of fossil synapsids, mainly from the Karroo of South Africa. In 1913, Ernst Gaupp was the first to present a synthesis of the available embryological and paleontological data, but a number of morphological details remained to be solved, such as the origin of the tympanic membrane. Gaupp favoured an independent origin of the eardrum in anurans, sauropsids, and mammals; we support most of his ideas. The present review emphasizes the problem of how the mammalian middle ear structures that developed at the angle of the lower jaw were transferred to the basicranium; the ontogenesis of extant marsupials provides important information on this question. PMID:26397963

  19. HRCT diagnosis in the evaluation of chronic middle ear inflammation

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Jung Sik; Kim, Dong Ik; Suh, Jung Ho; Chung, Tae Sub [College of Medicine, Yonsei Univ., Seoul (Korea, Republic of)

    1990-10-15

    Though the preoperative high-resolution computed tomographic (HRCT) evaluation of the patients with chronic middle ear inflammation, the nature and potential complications of the lesions can be evaluated more accurately than previous imaging modalities. We retrospectively reviewed the HRCT findings of chronic middle ear inflammation in 50 surgically proven cases during recent 2 years. We also compared findings of HRCT and otologic surgery in order to know the diagnostic ability of HRCT about the true nature and extent of soft tissue inflammatory masses within the middle ear and various complications. The results obtained were as follows : 1. HRCT demonstrated the soft tissue inflammatory lesions in the middle ear cavity in all 50 cases. Among these, 32 cases were confirmed to have cholesteatoma, and 12 cases of granulations tissue including 2 cases of cholestrol granuloma, 3 cases of thickened mucosa and 3 cases of inflammatory exude were verified respectively. 2. Among the 32 cases of cholesteatoma, HRCT showed the ossicular erosion in 87% and other complications in 38% of cases. The types of cholesteatoma can be predicted according to the site and extension of soft tissue mass except in 6 cases. 3. Among the 12 cases of granulation tissue, HRCT also showed the erosion of ossicles in 50% and facial nerve canal in 17%. 4. Pars flaccida type cholesteatomas (21 cases) were most frequently noted in atticoantral area (67%) and pars tensa type (4 cases) in mesotympanum (75%). 5. Incus body and malleus head were the most vulnerable portions of bony erosion in pars flaccida type (10/21). 6. We met some difficulty in differentiation of the soft tissue inflammatory mass in 7 cases.

  20. Tomography and xerotomography after reconstructive middle ear surgery for cholesteatoma

    International Nuclear Information System (INIS)

    In order to adequately visualize the ossicles and other fine structures in the middle ear, sophisticated radiological methods are essential. The temporal bone has been studied with hypocycloidal tomography using conventional films and xerotomography in 60 patients with cholesteatoma. In 53 of the patients xerotomography gave good results while conventional tomography gave good results in only 38 patients. The superiority of xerotomography to conventional radiological methods is stressed. The only drawback is the high radiation dose to the patient. (orig.)

  1. Determining otitis media severity from middle ear fluid analysis.

    Science.gov (United States)

    Juhn, S K; Garvis, W J; Lees, C J; Le, C T; Kim, C S

    1994-05-01

    Otitis media has a complex multifactorial pathogenesis, and the middle ear inflammatory response is typified by the accumulation of cellular and chemical mediators in middle ear effusion. However, specific biochemical and immunochemical factors that may be responsible for the severity or chronicity of otitis media have not been identified. Identification of factors involved in chronicity appears to be an essential step in the treatment and ultimate prevention of chronic otitis media. We analyzed 70 effusion samples from patients 1 to 10 years of age who had chronic otitis media with effusion for two cytokines (interleukin-1 beta and tumor necrosis factor alpha) and total collagenase. The highest concentrations of all three inflammatory mediators were found in purulent otitis media, and concentrations were higher in younger than in older patients. Mediator concentrations were similar in samples obtained from patients having their first myringotomy for otitis media with effusion and in those who had had multiple previous myringotomies. The multiresponse star, which incorporates several biochemical parameters in one graphic illustration, may best characterize the complex nature of middle ear inflammation. PMID:8179269

  2. Middle ear cleft in chronic otitis media: a clinicohistopathological study.

    Science.gov (United States)

    Sharma, Karan; Manjari, Mridu; Salaria, Neha

    2013-12-01

    Chronic mucosal diseases of middle ear cleft or chronic suppurative otitis media has been traditionally defined as a chronic inflammation of the middle ear and mastoid usually associated with perforation of the tympanic membrane and otorrhoea. Understanding the pathology and pathogenesis of chronic suppurative otitis media is important in predicting the management, prognosis and sequelae of the disease. The present prospective study was conducted to evaluate the clinical, intraoperative and histopathological changes in middle ear cleft. 100 patients diagnosed with CSOM who underwent surgery were taken. The mucosa and granulation tissue was removed along with ossicles wherever indicated and sent for histopathological examination. On clinical examination, 72 cases were found to be of tubotympanic type and 28 cases of atticoantral variety. However, intraoperatively, of the tubotympanic cases 8 were found to be of unsafe type which was also proven histologically. Stratified squamous epithelium was revealed in most of the cases accompanied by changes in the submucosa. Ossicular chain was involved in 40 cases with incus being the commonest bone to be eroded. PMID:24427703

  3. Imaging Finding of Malignant Melanoma of Eustachian Tube with Extension to Middle Ear Cavity: Case Report

    International Nuclear Information System (INIS)

    We report a case of malignant melanoma of Eustachian tube with extension to the middle ear cavity and nasopharynx in a 51-year-old woman who presented with right ear fullness. Computed tomography showed a soft tissue mass in the middle ear cavity and caused the widening and eroding of the bony eustachian tube. Magnetic resonance imaging showed well enhancing mass in eustachian tube extending nasopharynx to middle ear cavity. A biopsy of the middle ear cavity mass revealed a malignant amelanotic melanoma.

  4. Neurological manifestations of ear disease in dogs and cats.

    Science.gov (United States)

    Garosi, Laurent S; Lowrie, Mark L; Swinbourne, Natalie F

    2012-11-01

    There are four major neuroanatomical structures associated with the ear that, when damaged, result in different neurologic clinical signs. These structures are the facial nerve, the ocular sympathetic tract, the vestibular receptors, and the cochlea. The clinical signs associated with disorders of each structure are discussed, followed by a summary of the diseases that should be considered in each case. The article begins with a description of the neuroanatomy of each of these structures. PMID:23122174

  5. The blood supply to the canine middle ear.

    Science.gov (United States)

    Stevens-Sparks, Cathryn; Jarrett, Keith; McNulty, Margaret A; Strain, George M

    2016-07-01

    Current descriptions of the anatomy of the blood supply to the canine middle ear are either incomplete or inconsistent, particularly in regards to the vascular branches in close proximity to the temporomandibular articulation (TMJ). To further investigate this blood supply, dissections (n = 9), corrosion casts (n = 4), and computed tomography (n = 8) of canine temporal regions/ears were performed. The goal of this study was to identify and describe branches of the external carotid and maxillary arteries in close proximity to the TMJ that supply the middle ear of the dog. Specific focus was placed on the constancy and origin of the canine rostral tympanic artery since this artery was anticipated to arise from the maxillary artery and enter a foramen at the medial aspect of the mandibular fossa adjacent to the TMJ. New anatomical variations of three canine arteries are described in this study. (1) The rostral tympanic artery is a branch of the temporomandibular ramus and is accommodated by a small foramen located within a depression medial to the temporomandibular joint. (2) A pharyngeal branch of the caudal deep temporal artery was identified. (3) The origin of the caudal auricular artery occurred opposite the lingual artery in 25.8% of dissected specimens, contrary to published descriptions. Anat Rec, 299:907-917, 2016. © 2016 Wiley Periodicals, Inc. PMID:27082971

  6. Anatomic Considerations on the Middle Ear in Dog

    Directory of Open Access Journals (Sweden)

    Carmen Berghes

    2010-05-01

    Full Text Available Purpose of this study is to explain some aspects of middle ear anatomy in dog. The study was conducted on five dog skulls (different ages from common, large size dogs. The skulls were processed by maceration and submitted to a treatment of mechanical cleaning with perhydrol. The temporal bone was collected first; the external wall was opened carefully to study the tympanic cavity. The ossicles were collected separately and subsequently described. From research carried promontory appears as an elongated projection that separates the oval window and round window. Vestibular window is oval or slightly ovoid shape of a hole, located dorso-medially to the promontory, which communicates with the middle ear vestibule. Cochlearia window appears as a round or circular hole located caudo-lateral to the promontory . it is blocked by a membrane called the tympanum secondary, cavity separating the ramp of the snail. In the ventro-oral cavity openings ductus faringo tympanicum. The osicules sound represented by hammer, anvil and stirrup are articulated with each other and form a chain as a link between the eardrum and vestibular window. Bones are driven by two muscles: the tensor muscle and muscle stirrup eardrum is very thin. osicules ear are relatively large and resemble those of humans. Lenticular bone is the lenticular process of the long arm of anvile.

  7. Inflammatory responses to Hydroxyapatite implants in middle ear in rats

    Institute of Scientific and Technical Information of China (English)

    YE Qing; JIANG Yi; WANG Xiao-yan; ZHENG Ke-fei

    2008-01-01

    Objective To study local inflammatory response after implantation of hydroxyapatite synthetic ossicular prosthesis. Methods Hydroxyapatite gantries were implanted in the bulla in 32 rats. Sham surgical procedures were performed in 10 rats as the control. Animals were sacrificed at 1 to 300 days after surgery. Bulla sections, stained with HE and Mallory's azan, were examined for numbers and percentages of various inflammatory cell types. Results Slightly more inflammatory reaction was seen in animals with the implant than in the controls, mostly during the early stage following the implantation procedure. Few inflammatory cells were observed at later times. There were satisfactory fibrosis in both implanted and control ears. Conclusion The results indicate that hydroxyapatite synthetic prosthesis is a biocompatible implantation material in the middle ear. Nonetheless, the presence of inflammatory reaction immediately following implantation implies that control of infection is important in the early times after the implantation procedure.

  8. Modeling Analysis of Biomechanical Changes of Middle Ear and Cochlea in Otitis Media

    Science.gov (United States)

    Gan, Rong Z.; Zhang, Xiangming; Guan, Xiying

    2011-11-01

    A comprehensive finite element (FE) model of the human ear including the ear canal, middle ear, and spiral cochlea was developed using histological sections of human temporal bone. The cochlea was modeled with three chambers separated by the basilar membrane and Reissner's membrane and filled with perilymphatic fluid. The viscoelastic material behavior was applied to middle ear soft tissues based on dynamic measurements of tissues in our lab. The model was validated using the experimental data obtained in human temporal bones and then used to simulate various stages of otitis media (OM) including the changes of morphology, mechanical properties, pressure, and fluid level in the middle ear. Function alterations of the middle ear and cochlea in OM were derived from the model and compared with the measurements from temporal bones. This study indicates that OM can be simulated in the FE model to predict the hearing loss induced by biomechanical changes of the middle ear and cochlea.

  9. Problems of middle ear and hearing in cleft children

    Directory of Open Access Journals (Sweden)

    Sharma Ramesh

    2009-10-01

    Full Text Available The hearing loss in a cleft patient is a well known complication, but generally gets ignored. These children continue to have recurrent otitis media with effusion that affects the hearing abilities. Unfortunatley the middle ear function may not improve with palatoplasty.Cleft palate teams need to follow up all such children beginning at birth and going into adulthood, decades after a ′successful′ palate repair. These patients should have careful otological and audiological surveillance with appropriate interventions whenever required. The review article discusses the current status of hearing management in patients with cleft palate.

  10. Investigation of middle ear anatomy and function with combined video otoscopy-phase sensitive OCT

    OpenAIRE

    Park, Jesung; Cheng, Jeffrey T.; Ferguson, Daniel; Maguluri, Gopi; Chang, Ernest W.; Clancy, Caitlin; Lee, Daniel J.; Iftimia, Nicusor

    2016-01-01

    We report the development of a novel otoscopy probe for assessing middle ear anatomy and function. Video imaging and phase-sensitive optical coherence tomography are combined within the same optical path. A sound stimuli channel is incorporated as well to study middle ear function. Thus, besides visualizing the morphology of the middle ear, the vibration amplitude and frequency of the eardrum and ossicles are retrieved as well. Preliminary testing on cadaveric human temporal bone models has d...

  11. Radiographic appearance of the middle ear after ventral bulla osteotomy in five dogs with otitis media

    International Nuclear Information System (INIS)

    Radiographs of the middle ear were made in five dogs 60 to 78 months after ventral bulla osteotomy was performed to treat otitis media. The clinical results of surgery were considered satisfactory in four dogs and unsatisfactory in one. In 4 dogs with satisfactory results, radiographs demonstrated complete reformation of the bulla in 3 operated middle ears (3 dogs), with partial bulla reformation in the three middle ears (3 dogs). Radiographs in one dog with unsatisfactory results showed complete bulla reformation with no increase in lumen opacity. The proliferative bony response obliterating the middle ear previously reported in normal dogs after ventral bulla osteotomy was not seen in any of these patients

  12. Aberrant internal carotid artery in the middle ear : a case report

    International Nuclear Information System (INIS)

    Aberrant internal carotid artery in the middle ear is a rare disease which, if unrecognized on raiological studies, can lead to serious complications during tissue biopsy. We report the imaging features of a case with aberrant internal carotid artery in the middle ear. A 60-year-old woman visited our hospital because of hearing difficulty on the right side. Temporal bone CT showed a well-defined mass of the right middle ear and lateral bony defect in the carotid canal adjacent to the mass. After arterial phase temporal bone CT with spiral CT and angiography, the mass could be diagnosed as aberrant internal carotid artery in the middle ear

  13. Investigation of middle ear anatomy and function with combined video otoscopy-phase sensitive OCT.

    Science.gov (United States)

    Park, Jesung; Cheng, Jeffrey T; Ferguson, Daniel; Maguluri, Gopi; Chang, Ernest W; Clancy, Caitlin; Lee, Daniel J; Iftimia, Nicusor

    2016-02-01

    We report the development of a novel otoscopy probe for assessing middle ear anatomy and function. Video imaging and phase-sensitive optical coherence tomography are combined within the same optical path. A sound stimuli channel is incorporated as well to study middle ear function. Thus, besides visualizing the morphology of the middle ear, the vibration amplitude and frequency of the eardrum and ossicles are retrieved as well. Preliminary testing on cadaveric human temporal bone models has demonstrated the capability of this instrument for retrieving middle ear anatomy with micron scale resolution, as well as the vibration of the tympanic membrane and ossicles with sub-nm resolution. PMID:26977336

  14. Eosinophilic otitis media: a new middle ear disease entity.

    Science.gov (United States)

    Iino, Yukiko

    2008-11-01

    Eosinophilic otitis media (EOM) is intractable otitis media characterized by the presence of a highly viscous yellow effusion containing eosinophils. It occurs mainly in patients with bronchial asthma and is resistant to conventional treatments for otitis media. Here we discuss the clinical features, pathogenesis, and management of EOM. EOM predominantly affects women and presents most often in patients in their 50s. The clinical features of the middle ear in EOM are roughly divided into the otitis media with effusion type and chronic otitis media type. The latter is further divided into two subtypes: simple perforation and granulation tissue formation. EOM is often complicated by rhinosinusitis (eosinophilic sinusitis). High-tone loss is more frequently found and more severe in EOM patients than in chronic otitis media control patients, and EOM patients sometimes become deaf suddenly. Systemic or topical steroid administration is the most effective treatment for patients with EOM. The instillation of triamcinolone acetonide, a suspension of steroids, into the middle ear is very effective for controlling eosinophilic inflammation. It is very important to explain to patients with EOM that the disease may last for a long period and that progressive and sudden hearing loss may occur. PMID:18940145

  15. STUDY OF INCIDENCE OF MIDDLE EAR HEMORRHAGE IN DROWNING

    Directory of Open Access Journals (Sweden)

    Chidanand

    2015-02-01

    Full Text Available OBJECTIVES: An autopsy study of deaths due to drowning with special reference to middle ear hemorrhage and spleen findings was done. METHODS: Data were collected from the police, relatives, and photographic evidences from the scene, postmortem findings and chemical analysis /histopathological examinations representative control groups. 101 cases of drowning deaths were studied. RE SULTS: The presence of froth, wrinkling, bleaching, soddening, overlapping of anterior margin of lungs, antemortem ingestion of water and postmortem aquatic bite marks were seen in 58%, 83%, 59%, 23%, 52%, 45% and 8% of cases respectively. Middle ear hemorrhage was seen in 72.27% of cases with an odd's ratio of 23.73 and it increased with increase in duration and depth of submersion. The mean organ weights observed in the drowning group were 1112.54±295.01, 1208.84±264.60, 121.68±53.28, 361.96±99.59gms for the combined lung, liver, spleen and combined kidney respectively; the increase in lung and kidney weight were statically significant and a 16% drop in the spleen weight seen after a postmortem interval of >24 hours was statistically insignificant . CONCLUSION: Males and the young population constituted the bulk and more than half of the deaths were unintentional and a significant number died in drainages. A good number of drowning deaths are preventable

  16. A short-wave infrared otoscope for middle ear disease diagnostics (Conference Presentation)

    Science.gov (United States)

    Carr, Jessica A.; Valdez, Tulio; Bruns, Oliver; Bawendi, Moungi

    2016-02-01

    Otitis media, a range of inflammatory conditions of the middle ear, is the second most common illness diagnosed in children. However, the diagnosis can be challenging, particularly in pediatric patients. Otitis media is commonly over-diagnosed and over-treated and has been identified as one of the primary factors in increased antibiotic resistance. We describe the development of a short-wave infrared (SWIR) otoscope for objective middle ear effusion diagnosis. The SWIR otoscope can unambiguously detect the presence of middle ear fluid based on its strong light absorption in the SWIR. This absorption causes a stark, visual contrast between the presence and absence of fluid behind the tympanic membrane. Additionally, when there is no middle ear fluid, the deeper tissue penetration of SWIR light allows the SWIR otoscope to better visualize middle ear anatomy through the tympanic membrane than is possible with visible light. We demonstrate that in healthy, adult human ears, SWIR otoscopy can image a range of middle ear anatomy, including landmarks of the entire ossicular chain, the promontory, the round window niche, and the chorda tympani. We suggest that SWIR otoscopy can provide valuable diagnostic information complementary to that provided by visible pneumotoscopy in the diagnosis of middle ear effusions, otitis media, and other maladies of the middle ear.

  17. Opacification of the middle ear and mastoid: imaging findings and clues to differential diagnosis.

    Science.gov (United States)

    Lo, A C C; Nemec, S F

    2015-05-01

    Opacification of the middle ear and mastoid represents a spectrum of inflammatory, neoplastic, vascular, fibro-osseous, and traumatic changes. This article reviews the most important clinical and pathological characteristics, emphasizing CT and MRI findings. Knowledge of subtle patterns of middle ear and mastoid opacification at CT and MRI provide guidance towards the correct diagnosis. PMID:25573814

  18. Opacification of the middle ear and mastoid: imaging findings and clues to differential diagnosis

    International Nuclear Information System (INIS)

    Opacification of the middle ear and mastoid represents a spectrum of inflammatory, neoplastic, vascular, fibro-osseous, and traumatic changes. This article reviews the most important clinical and pathological characteristics, emphasizing CT and MRI findings. Knowledge of subtle patterns of middle ear and mastoid opacification at CT and MRI provide guidance towards the correct diagnosis

  19. Characterization of cytokines present in middle ear effusions.

    Science.gov (United States)

    Yellon, R F; Leonard, G; Marucha, P T; Craven, R; Carpenter, R J; Lehmann, W B; Burleson, J A; Kreutzer, D L

    1991-02-01

    Retention of inflammatory mediators and cells in the middle ear cleft during chronic otitis media with effusion (COME), results in ongoing inflammation with the potential for pathologic changes and hearing loss. Cytokines are glycoproteins produced by macrophages and other cells. Activities of cytokines include fever production, osteoclast, fibroblast, phagocyte and cytotoxic cell activation, regulation of antibody formation, and inhibition of cartilage, bone and endothelial cell growth. Using enzyme-linked immunospecific assays we measured levels of six cytokines in middle ear effusions (MEE) from children with COME. Significant levels of four cytokines: interleukin-1-beta (greater than 50 pg/ml), interleukin-2 (greater than 300 pg/ml), tumor necrosis factor-alpha (greater than 40 pg/ml), and gamma-interferon (greater than 6.25 pg/ml) were found in 51%, 54%, 63%, and 19% of MEE, respectively. In contrast, levels of a fifth cytokine, granulocyte-macrophage colony-stimulating factor, and a sixth cytokine, interleukin-4, were undetectable. Age was observed to have a significant effect on the levels of specific cytokines. Interleukin-1 (IL-1) correlated inversely (P less than .02) with age such that the younger the child, the higher the level of IL-1 in MEE. Tumor necrosis factor-alpha (TNF) correlated directly (P less than .005) with age such that the older the child, the higher the level of TNF in MEE. Children undergoing tympanostomy on multiple occasions had average MEE TNF levels (234.2 +/- 109.1 pg/mg total protein) that were nearly 14 times higher (P less than .005) than those from children undergoing their first tympanostomy (16.9 +/- 3.0 pg/mg total protein). Thus IL-1 correlated with the early stages of COME, while TNF correlated with persistence of disease. The presence of these cytokines in MEE may be responsible for the mucosal damage, bone erosion, fibrosis, and resulting hearing loss seen in some cases of COME. PMID:1992267

  20. Real ear unaided gain and its relation with the equivalent volume of the external and middle ear

    Directory of Open Access Journals (Sweden)

    Bastos, Bárbara Guimarães

    2012-01-01

    Full Text Available Introduction: Old age is associated with changes in the characteristics of the middle ear transmission system and in external ear resonance, and these carry implications for the hearing aid (HA verification process for which targets and measures of the real ear insertion gain (REIG are used. Aim: To compare the real ear unaided gain (REUG and the equivalent volumes of the external ear (VeqEE and the middle ear (VeqME between elderly and adult patients. Methods: This is a retrospective study in which the medical records of 28 elderly patients (aged between 61 and 102 years, average hearing thresholds between 38.75 and 85 dB HL and 23 adult patients (aged 20-59, mean hearing thresholds between 31.25 and 116.25 dB HL with bilateral sensorineural hearing loss and no history of middle ear abnormalities were analyzed. Immittance measurements (VeqEE, VeqME, and pressure of the peak of maximum compliance and the REUG (frequency and amplitude of the primary peak were recovered for a total of 40 ears. These data were compared between elderly and adults as well as between men and women, using Student's t test. Correlations (Pearson between immittance and REUG data were also verified. Results: No statistically significant differences (p < 0.01 were found for immittance and REUG data between elderly and adults, or between men and women. A negative and weak but significant correlation was observed between the REUG primary peak and VeqEE. Conclusion: Hearing aid verification can be performed with target and measures of the REIG in the elderly population.

  1. CT and magnetic resonance imaging features of middle ear adenoma of neuroendocrine differentiation: A case report

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Kwon; Choe, Mi Sun [Keimyung University School of Medicine, Daegu (Korea, Republic of)

    2013-09-15

    Middle ear adenoma is a rare benign epithelial tumor. We report the CT and magnetic resonance imaging findings of a case of middle ear adenoma of neuroendocrine differentiation in a 36-year-old man. On high-resolution CT, the mass was found to fill the middle ear, in which the ossicles were embedded, but not destroyed, with outward bulging of the intact tympanic membrane. On MRI, the mass, which was intensely enhanced on 3-dimensional (3D) gadolinium (Gd)-enhanced spoiled gradient-recalled (SPGR) sequence, involved the middle ear, aditus ad antrum and a portion of mastoid antrum. Histological and immunohistochemical findings of the specimen obtained by surgical excisions were consistent with middle ear adenoma of neuroendocrine differentiation. Middle ear adenoma of neuroendocrine differentiation should be included in the differential diagnosis of an intensely enhancing mass filling the middle ear/mastoid antrum without ossicular destructions. The extent of the mass can be excellently assessed with 3D Gd-enhanced SPGR sequence.

  2. CT and magnetic resonance imaging features of middle ear adenoma of neuroendocrine differentiation: A case report

    International Nuclear Information System (INIS)

    Middle ear adenoma is a rare benign epithelial tumor. We report the CT and magnetic resonance imaging findings of a case of middle ear adenoma of neuroendocrine differentiation in a 36-year-old man. On high-resolution CT, the mass was found to fill the middle ear, in which the ossicles were embedded, but not destroyed, with outward bulging of the intact tympanic membrane. On MRI, the mass, which was intensely enhanced on 3-dimensional (3D) gadolinium (Gd)-enhanced spoiled gradient-recalled (SPGR) sequence, involved the middle ear, aditus ad antrum and a portion of mastoid antrum. Histological and immunohistochemical findings of the specimen obtained by surgical excisions were consistent with middle ear adenoma of neuroendocrine differentiation. Middle ear adenoma of neuroendocrine differentiation should be included in the differential diagnosis of an intensely enhancing mass filling the middle ear/mastoid antrum without ossicular destructions. The extent of the mass can be excellently assessed with 3D Gd-enhanced SPGR sequence.

  3. Middle ear cavity morphology is consistent with an aquatic origin for testudines.

    Directory of Open Access Journals (Sweden)

    Katie L Willis

    Full Text Available The position of testudines in vertebrate phylogeny is being re-evaluated. At present, testudine morphological and molecular data conflict when reconstructing phylogenetic relationships. Complicating matters, the ecological niche of stem testudines is ambiguous. To understand how turtles have evolved to hear in different environments, we examined middle ear morphology and scaling in most extant families, as well as some extinct species, using 3-dimensional reconstructions from micro magnetic resonance (MR and submillimeter computed tomography (CT scans. All families of testudines exhibited a similar shape of the bony structure of the middle ear cavity, with the tympanic disk located on the rostrolateral edge of the cavity. Sea Turtles have additional soft tissue that fills the middle ear cavity to varying degrees. When the middle ear cavity is modeled as an air-filled sphere of the same volume resonating in an underwater sound field, the calculated resonances for the volumes of the middle ear cavities largely fell within testudine hearing ranges. Although there were some differences in morphology, there were no statistically significant differences in the scaling of the volume of the bony middle ear cavity with head size among groups when categorized by phylogeny and ecology. Because the cavity is predicted to resonate underwater within the testudine hearing range, the data support the hypothesis of an aquatic origin for testudines, and function of the middle ear cavity in underwater sound detection.

  4. Middle ear cavity morphology is consistent with an aquatic origin for testudines

    DEFF Research Database (Denmark)

    Willis, Katie L; Christensen-Dalsgaard, Jakob; Ketten, Darlene R;

    2013-01-01

    evolved to hear in different environments, we examined middle ear morphology and scaling in most extant families, as well as some extinct species, using 3-dimensional reconstructions from micro magnetic resonance (MR) and submillimeter computed tomography (CT) scans. All families of testudines exhibited a...... bony middle ear cavity with head size among groups when categorized by phylogeny and ecology. Because the cavity is predicted to resonate underwater within the testudine hearing range, the data support the hypothesis of an aquatic origin for testudines, and function of the middle ear cavity in...

  5. The malleable middle ear: an underappreciated player in the evolution of hearing in vertebrates

    DEFF Research Database (Denmark)

    Christensen-Dalsgaard, Jakob; Manley, Geoffrey A.

    The middle ear of tetrapods (limbed vertebrates) originated from nonauditory structures, and has been modified by adaptations arising from the lifestyle of the tetrapods. These accessory structures for the inner ear increased the sensitivity to airborne sound, the frequency range of hearing, and ...

  6. Effects of Consecutive Wideband Tympanometry Trials on Energy Absorbance Measures of the Middle Ear

    Science.gov (United States)

    Burdiek, Laina M.; Sun, Xiao-Ming

    2014-01-01

    Purpose: Wideband acoustic immittance (WAI) is a new technique for assessing middle ear transfer function. It includes energy absorbance (EA) measures and can be acquired with the ear canal pressure varied, known as "wideband tympanometry" (WBTymp). The authors of this study aimed to investigate effects of consecutive WBTymp testing on…

  7. Middle ear rhabdomyosarcoma infiltrating the petrous with diffuse leptomeningeal spread in a child

    Directory of Open Access Journals (Sweden)

    Pravin Salunke

    2012-01-01

    Full Text Available We present a case of middle ear rhabdomyosarcoma with intracranial erosion and later presented with diffuse leptomeningeal spread. Such lesions are difficult to eradicate and have a poor prognosis

  8. Bone Signaling in Middle Ear Development: A Genome‐Wide Differential Expression Analysis

    DEFF Research Database (Denmark)

    Nielsen, Michelle Christine; Bertelsen, Tomas Martin; Friis, Morten; Winther, Ole; Friis‐Hansen, Lennart; Cayé‐Thomasen, Per; Sørensen, Mads Sølvsten

    2014-01-01

    260 genes were identified of which 22 genes were involved in bone metabolism. Gene set analysis revealed five enriched bone‐related gene sets. The identified differentially expressed bone‐related mRNAs and gene sets are of potential significance in the normally developing bulla. These factors and gene......Common middle ear diseases may affect bone behavior in the middle ear air cell system. To understand this pathologic pneumatization, the normal development of bone in the middle ear should be investigated. The objective of this study was to analyze gene expression of bone‐related signaling factors...... and gene sets in the developing middle ear. Microarray technology was used to identify bone‐related genes and gene sets, which were differentially expressed between the lining tissue of adult (quiescent) bulla and young (resorbing/forming) bulla. Data were analyzed using tools of bioinformatics and...

  9. Theory of forward and reverse middle-ear transmission applied to otoacoustic emissions in infant and adult ears

    OpenAIRE

    Keefe, Douglas H.; Abdala, Carolina

    2007-01-01

    The purpose of this study is to understand why otoacoustic emission (OAE) levels are higher in normal-hearing human infants relative to adults. In a previous study, distortion product (DP) OAE input/output (I/O) functions were shown to differ at f2=6 kHz in adults compared to infants through 6 months of age. These DPOAE I/O functions were used to noninvasively assess immaturities in forward/reverse transmission through the ear canal and middle ear [Abdala, C., and Keefe, D. H., (2006). J. Aco...

  10. The Efficiency of Titanium Middle Ear Prosthesis in Ossicular Chain Reconstruction: Our Experience

    OpenAIRE

    Shah, Kshitij Dhaval; Bradoo, Renuka A.; Joshi, Anagha A.; Sapkale, Deepti D.

    2011-01-01

    Middle ear ossicular reconstruction is a challenging task for any otologist. Over a period of time, surgeons have tried various types of materials as ossicular prosthesis with varying amount of success. In the last decade, numerous studies have been conducted that have proved that titanium prosthesis is biocompatible. We have conducted this study to investigate the efficiency of titanium middle ear prosthesis (Eon Meditech Pvt. Ltd.) in tympanoplasty. Nineteen patients who underwent tympanopl...

  11. Loudness changes resulting from an electrically induced middle-ear reflex.

    Science.gov (United States)

    Gunn, W. J.

    1973-01-01

    An experiment was conducted in order to determine the changes in loudness brought about by electro-cutaneous elicitation of the middle-ear reflex. Subjects were required to judge the relative loudness of the second of three consecutive 30-msec bursts of tone, the second tone being accompanied by an electrical shock to the external auditory meatus, capable of eliciting a contraction of the middle-ear muscles. The difference between these judgments and those of the control condition (shock on the arm) was taken to represent a measure of the attenuation provided by contraction of the middle-ear muscles. Test tones were 500, 1000, 2000, and 3000 Hz at levels of 65, 75, 85, 95, and 105 dB. The results indicate that the middle-ear reflex decreases the middle-ear's transmission mainly for low-frequency sounds. The results fail to lend support to the Loeb-Riopelle hypothesis that the middle-ear reflex acts as a limiter, rather than a linear attenuator.

  12. Middle Ear Infection (Chronic Otitis Media) and Hearing Loss

    Science.gov (United States)

    ... hearing loss in ears with fluid is 24 decibels...equivalent to wearing ear plugs. (Twenty-four decibels is about the level of the very softest ... can cause much more loss, up to 45 decibels (the range of conversational speech). Your child may ...

  13. Early-response cytokine expression in adult middle ear effusions.

    Science.gov (United States)

    Ondrey, F G; Juhn, S K; Adams, G L

    1998-10-01

    Various cytokines are presently known to be associated with the regulation of inflammatory responses. In pediatric otitis media, cytokines that correlate with various degrees of inflammation are present in middle ear effusions as inflammatory mediators. The present study was undertaken to examine the potential role of the early-response cytokines, interleukin-1beta and tumor necrosis factor-alpha, in adult otitis media. Fifty-nine adults with otitis media underwent tympanocentesis, and the effusion specimens were analyzed for the presence of both cytokines by enzyme-linked immunosorbent assay methods. Eighty-eight percent of the effusions were serous in nature. Sixty-seven percent of the patients had a known history of head and neck malignancy and radiation to the temporal bone. Twelve percent of the effusions were positive for interleukin-1beta expression, compared with 85% of effusions in children with otitis media. Eight percent of the effusions contained tumor necrosis factor-alpha, compared with 85% of those collected in pediatric otitis media. All of the specimens that contained tumor necrosis factor-alpha also contained interleukin-1beta. In the present study, there was no correlation with head and neck malignancy/radiation or the clinical degree of inflammation with the presence of either cytokine. We conclude that adult otitis media is associated with lower expression of an acute inflammatory response, as judged by the levels of interleukin-1beta and tumor necrosis factor-alpha in the effusions. Additionally, adult otitis probably represents a less severe and more chronic inflammatory state in comparison with pediatric otitis media. Further analysis of inflammatory mediators in adult otitis media is necessary to evaluate the contribution of cytokines in relation to various etiologic factors. PMID:9781987

  14. Cavernous Hemangioma of the External Canal, Tympanic Membrane, and Middle Ear Cleft: A Case Report.

    Science.gov (United States)

    Odat, Haitham; Al-Qudah, Mohannad; Al-Qudah, Mohammad A

    2016-06-01

    Cavernous hemangioma involving the external canal, tympanic membrane, and middle ear cavity is extremely rare. We present a case of a 45-year-old woman who had progressive right sided decreased hearing, pulsatile tinnitus, and aural fullness of 7 months duration. Microscopic examination, imaging studies, surgical treatment, and histological evaluation are reported. To the best of our knowledge, this is the first case of cavernous hemangioma with simultaneous involvement of the external ear, tympanic membrane, middle ear, and attic reported in English literature. PMID:26304856

  15. Assessment of middle ear function in patients with cleft palate treated under "Smile Train Project"

    Directory of Open Access Journals (Sweden)

    Prachi Gautam

    2011-01-01

    Full Text Available Objective: To evaluate the middle ear function in patients of cleft palate treated under "Smile Train Project". Materials and Methods: Sixty patients (120 ears; 32 male and 28 female of cleft palate with or without cleft lip were evaluated in pediatrics and ENT OPD in preoperative period. A general medical check up was performed in pediatrics OPD to evaluate the associated craniofacial anomalies. Middle ear function was evaluated in ENT OPD. Otoscopy was done in all patients. Cases under five years of age were evaluated for middle ear function by tympanometry and cases with more than five years of age were evaluated by tympanometry for middle ear function and pure tone audiometry to establish the type of hearing loss. The results are presented as number of ears. Results: A total of 50% of the patients in the study group were in zero- to two-year age group. Otoscopy findings in 120 ears showed that 66.66% of the patients had dull tympanic membrane suggesting a diagnosis of otitis media with effusion. Tympanometry was done in 110 ears, of which, 72.72% of ears had type B tympanogram suggesting otitis media with effusion. Pure tone audiometry in more than five years age group showed that 81.25% ears had conductive hearing loss. Conclusion: This study suggests the need of preoperative ENT check up and audiological assessment in patients of cleft palate undergoing palatal surgery under "Smile Train Project". The association of otitis media with effusion in patients with cleft palate appears strong and a high degree of suspicion for the disease should be kept in them. The anatomical defect and possible causative pathophysiology also supports the inference. Otitis media with effusion causing hearing loss in these patients causes speech delay and unfavorable outcome despite aggressive speech therapy in postoperative period. A co-ordinate team approach of concerned specialists involved in managing these patients would definitely improve their outcome.

  16. [Aural polyp in chronic inflammatory middle ear disease].

    Science.gov (United States)

    López Aguado, D; López Campos, D; Pérez Piñero, B; Campos Bañales, M E

    2003-03-01

    240 patients with chronic otitis media (COM) were studied: 166 ears termed as non cholesteatomatous otitis media and 74 with cholesteatoma. In 38 ears an aural polyp was found with no evidence of cholesteatoma in 19 ears (11.4%) whereas a cholesteatoma was present in the remaining 19 ears. The histology of the polyp and the characteristics of the chronic process were matched: a) The aural polyp is an infrequent complication in COM. b) After histological analysis was found to present two different pictures: The inflammatory reaction polyp, present in non cholesteatomatous COM; and the polyp with granulation tissue and foreign body reaction (keratina) usually found in cholesteatomatous COM. c) The finding of granulation tissue reaction and keratina in an aural polyp is a good predictor for the presence of a cholesteatoma. PMID:12825338

  17. A RETROSPECTIVE STUDY OF FACIAL NERVE DEHISCENCE ENCOUNTERED DURING MIDDLE EAR SURGERY

    Directory of Open Access Journals (Sweden)

    Gurumani

    2014-09-01

    Full Text Available OBJECTIVE: The aim of this study to evaluate the incidence and localization of facial nerve dehiscence in patients undergoing middle ear surgery. MATERIALS AND METHODS: A retrospective study done at our ENT center consists of 103 patients undergoing various middle ear surgery. The patients who have been operated in our ENT center for middle ear problems in last 3 years were enrolled for the study. Among 103 patients, 35 were women, 68 were men with age ranging from 7 to 59. STATISTICAL TOOL: proportion and percentage, Chi square test. Statistical method analyzed by Graph Pad Instat software. RESULTS: Facial nerve dehiscence occurred in 15 (14.5% of 103 patients. Involvement of tympanic segment more common than other segments. CONCLUSION: Conclusively, one out of every 10 surgical cases may have dehiscence of the facial canal which has to be always keeping in mind during surgical manipulation of the middle ear. Facial nerve is most vulnerable structure in middle ear and that should be dealt carefully to avoid complications.

  18. Carcinoid Tumors in the Middle Ear: a Case Report and Literature Review

    Institute of Scientific and Technical Information of China (English)

    WANG Entong; GONG Weixi; DA Jiping

    2006-01-01

    Middle ear carcinoid tumor (MEC T) is rare. Only 46 cases of MECT have been reported in the literature since the first case of MECT was described in 1980. We present here a case of primary MECT initially diagnosed as inflammatory aural polyp. The case was a 43-year-old women complaining of right ear chronic otorrhea and hearing loss over a period of five years, with a blockage sensation in the right ear for two years. Audiometry showed conductive hearing loss in the right ear. Physical examination and CT scans showed a mass in the right external auditory canal and middle ear, surrounding the ossicular chain. Pathologic study of surgically removed specimen revealed features of carcinoid tumor with positive staining to chromogranin A and synaptophysin in tumor cells. Local radiation of 60 Gy was applied. The patient has been followed up for more than one year. Postoperative histopathological examination showed no evidence of MECT recurrence one year after surgery, but inflammatory changes in the middle ear. Relevant literatures were reviewed. Clinical, histopathological, immunohistochemical and ultrastructural features of MECT, and strategies in MECT diagnosis and management are discussed.

  19. Unusual presentation of glomus tympanicum tumour: New bone formation in the middle ear.

    Science.gov (United States)

    Kumar, Gaurav; Andreou, Zenon; Virk, Jagdeep Singh; Owa, Anthony

    2014-09-16

    The objective of this study is to increase awareness of the rare presentation, diagnostic difficulties and management of glomus tympanicum of the middle ear. A 49 years old male, with a background of hypertension and epilepsy, presented with a two month history of left sided conductive hearing loss, pulsatile tinnitus and headache. Clinically and radiologically a diagnosis of glomus tympanicum was made. Intraoperatively, extensive osteogenesis of the middle ear resulting in ossicular fixation and erosion was found. This patient required a two stage operation for full clearance of disease. A stapedectomy drill was used to drill off the bony overgrowth surrounding the ossicles resulting in improved hearing thresholds and full clearance of the disease at two year follow up. Glomus tympanicum can result in new bone formation in the middle ear with resultant ossicular fixation and conductive hearing loss. This can be effectively treated surgically with restoration of hearing. PMID:25232551

  20. First Branchial Cleft Fistula Associated with External Auditory Canal Stenosis and Middle Ear Cholesteatoma

    Directory of Open Access Journals (Sweden)

    shahin abdollahi fakhim

    2014-10-01

    Full Text Available Introduction: First branchial cleft anomalies manifest with duplication of the external auditory canal.   Case Report: This report features a rare case of microtia and congenital middle ear and canal cholesteatoma with first branchial fistula. External auditory canal stenosis was complicated by middle ear and external canal cholesteatoma, but branchial fistula, opening in the zygomatic root and a sinus in the helical root, may explain this feature. A canal wall down mastoidectomy with canaloplasty and wide meatoplasty was performed. The branchial cleft was excised through parotidectomy and facial nerve dissection.   Conclusion:  It should be considered that canal stenosis in such cases can induce cholesteatoma formation in the auditory canal and middle ear.

  1. Your Ears

    Science.gov (United States)

    ... Other Kids Are Reading Movie: Digestive System Winter Sports: Sledding, Skiing, Snowboarding, Skating Crushes What's a ... Middle Ear: Good Vibrations The Inner Ear: Nerve Signals Start Here Day or Night, Ears Keep You Upright Three Cheers for the ...

  2. Macroscopic description of the external and middle ear of paca (Cuniculus paca Linnaeus, 1766

    Directory of Open Access Journals (Sweden)

    Leandro L. Martins

    2015-06-01

    Full Text Available Abstract: Paca (Cuniculus paca, one of the largest rodents of the Brazilian fauna, has inherent characteristics of its species which can conribute as a new option for animal experimantation. As there is a growing demand for suitable experimental models in audiologic and otologic surgical research, the gross anatomy and ultrastructural ear of this rodent have been analyzed and described in detail. Fifteen adult pacas from the Wild Animals Sector herd of Faculdade de Ciências Agrárias e Veterinárias, Unesp-Jaboticabal, were used in this study. After anesthesia and euthanasia, we evaluated the entire composition of the external ear, registering and ddescribing the details; the temporal region was often dissected for a better view and detailing of the tympanic bulla which was removed and opened to expose the ear structures analyzed mascroscopically and ultrastructurally. The ear pinna has a triangular and concave shape with irregular ridges and sharp apex. The external auditory canal is winding in its path to the tympanic mebrane. The tympanic bulla is is on the back-bottom of the skull. The middle ear is formed by a cavity region filled with bone and membranous structures bounded by the tympanic membrane and the oval and round windows. The tympanic membrane is flat and seals the ear canal. The anatomy of the paca ear is similar to the guinea pig and from the viewpoint of experimental model has major advantages compared with the mouse ear.

  3. Middle ear muscle contractions and their relation to pulse and echo evoked potentials in the bat

    Science.gov (United States)

    Henson, O. W., Jr.; Henson, M. M.

    1972-01-01

    An analysis is made of pulse and echo orientation cries of the Mustache Bat. That bat's cries are characterized by a long, 60 to 30 msec, pure tone component and brief beginning and terminal FM sweeps. In addition to obvious echo overlap and middle ear muscle contractions, the following are examined: (1) characteristics of pulse- and echo-evoked potential under various conditions, (2) evidence of changes in hearing sensitivity during and after pulse emission, and (3) the role of the middle ear muscles in bringing about these changes.

  4. Three-dimensional CT of the middle ear and adjacent structures

    International Nuclear Information System (INIS)

    Three-dimensional (3D) computed tomography of the middle ear and adjacent structures has been carried out in two cadaveric heads from axial and coronal high-resolution images. The structures shown on the images of the walls of the tympanic cavity are illustrated. The usefulness and limitations of the technique, in this region, are discussed: Use of grey level volumes at the surface of the slices and the inclusion of structural landmarks is emphasized. The 3D representations show the anatomical spacial relationships of the small structures in and around the middle ear to advantage. The information may be of use in surgical orientation. (orig.)

  5. Medicinal plant treatments for fleas and ear problems of cats and dogs in British Columbia, Canada.

    Science.gov (United States)

    Lans, Cheryl; Turner, Nancy; Khan, Tonya

    2008-09-01

    Research conducted in 2003/2004 documented and validated (in a non-experimental way) ethnoveterinary medicines used by small-scale, organic livestock farmers in British Columbia (BC), Canada. Interviews were conducted with 60 participants who were organic farmers or holistic medicinal/veterinary practitioners. A workshop was held with selected participants to discuss the plant-based treatments. This paper reports on the medicinal plants used for fleas in cats and dogs. Fleas and flies are treated with Artemisia vulgaris L. (Asteraceae), Citrus x limon (L.), Juniperus communis L. var. depressa Pursh. (Cupressaceae), Lavandula officinalis L. (Labiatae), Melissa officinalis L. (Lamiaceae), and Thuja plicata Donn ex D. Don (Cupressaceae). All of the plants used have insecticidal activity. Ear problems are treated with Achillea millefolium L., Calendula officinalis L., and Helichrysum angustifolium (Roth.) G. Don. (Asteraceae), Allium sativum L. (Alliaceae), Berberis aquifolium Pursh./Mahonia aquifolium (Berberidaceae), Glycyrrhiza glabra L. (Fabaceae), Lobelia inflata L. (Campanulaceae), Matricaria recutita L., Melaleuca alternifolia L. (Myrtaceae), Origanum vulgare L. (Labiatae), Ricinus communis L. (Euphorbiaceae), Syzygium aromaticum (L.) Merr. & L. M. Perry (Myrtaceae), Thymus vulgaris L. (Lamiaceae), and Verbascum thapsus L. (Scrophulariaceae). PMID:18563443

  6. Computed tomography and magnetic resonance imaging of pathologic conditions of the middle ear

    International Nuclear Information System (INIS)

    Computed tomography (CT) is an excellent technique for demonstrating even small abnormalities of the thin and complex bony structures of the middle ear. For this reason, it is the modality of choice in the study of conductive hearing loss (CHL). However, not every patient complaining of CHL requires a CT study. In fact, established indications encompass complex conditions, such as the complications of acute and chronic otomastoiditis, the postoperative ear in chronic otomastoiditis or in the localization of prosthetic devices, and the assessment of congenital or vascular anomalies. Particularly, the precise extent of bone erosion associated with cholesteatoma is correctly demonstrated by high resolution CT. Conversely, although fistulization through the tegmen tympani or the posterior wall of temporal bone is usually detectable by CT, the actual involvement of meninges and veins are better assessed by magnetic resonance (MR). MR is also indicated when complicated inflammatory lesions are suspected to extend into the inner ear or towards the sigmoid sinus or jugular vein. Neoplasms arising from or extending into the middle ear require the use of both techniques as their combined data provide essential information. Most important data for surgical planning concern the destruction of thin bony structures and the relationships of the lesion with the dura and surrounding vessels. DSA and interventional vascular techniques maintain an essential role in the presurgical work-up and embolization of paragangliomas extended into the middle ear

  7. Assessment of middle ear effusion and audiological characteristics in young children with adenoid hypertrophy

    Institute of Scientific and Technical Information of China (English)

    REN Dong-dong; WANG Wu-qing

    2012-01-01

    Background Otitis media with effusion is a highly concurrent disease in young children with adenoid hypertrophy.The aim of this study was to assess the middle ear effusion and audiological characteristics in children with adenoid hypertrophy and compare the various assessment methods.@@Methods Two hundred and seven candidates who were to undergo adenoidectomy were analyzed using otoscopy,tympanometry,air-conduction auditory steady-state responses (AC-ASSR),and computerized tomography (CT) before adenoidectomy.@@Results About 73.4% (304/414) of ears were confirmed to have middle ear effusion (MEE) by otoscopy; 75.4% (312/414) of ears revealed MEE by CT.CT scan correctly predicted all the myringotomy results,giving 100% accuracy on the diagnosis of MEE.Additionally,CT revealed two children with inner ear malformations.Type B tracing tympanogram provided a sensitivity of 91.7% and a specificity of 92.2%.Type C tympanogram with peak pressure <-200 daPa indicated effusion; type C tympanogram having acoustic stapedius reflex could exclude MEE.We excluded the AC-ASSR results of the 4 ears with malformation; 54.4% (223/410) of ears were confirmed of hearing loss.Furthermore,5.2%(16/310) of the ears with MEE suffered from severe to profound hearing loss.The average threshold level in the 0.25 kHz frequency of children was found to have poorer hearing thresholds than those in the 0.5,1,2,and 4 kHz (P <0.001) frequencies; 29.7% (92/310) of ears with MEE were regarded as normal hearing level.About 55.8% (173/310) of ears with MEE were classified as having slight-mild hearing loss.@@Conclusions The practitioners should pay much attention to the middle ear condition and be aware of a possible development of severe to profound hearing loss during the course of MEE in young children with adenoid hypertrophy.CT scan is good for the assessment of MEE before ventilation tube insertion.

  8. Femtosecond laser microstructuring of titanium surfaces for middle ear ossicular replacement prosthesis: results of preliminary studies

    Science.gov (United States)

    Biedron, S.; Ilgner, J. F. R.; Fadeeva, E.; Chichkov, B.; Prescher, A.; Bovi, M.; Westhofen, M.

    2009-07-01

    The objective of this study was to optimize titanium surfaces by means of Ti:Sapphire femtosecond laser to improve the attachment of human cartilage cells on titanium prosthesis in middle ear surgery. The application of microstructures on titanium samples was evaluated and the influence of these microstructures on human auricular chondrocytes was studied in-vitro. After establishing the ear chondrocyte cell culture, cells were seeded on titanium platelets with selected microstructure patterns. Whereas the phenotype of cells seeded on unstructured titanium was similar to cells grown on standard tissue culture surfaces, the morphology of chondrocytes grown on structured titanium samples was influenced by the pattern. For future titanium middle ear prosthesis structural optimizations will be developed to promote chondrocyte growth and adhesion while impeding fibrocyte proliferation to avoid scarring on implant interfaces.

  9. [Middle ear cancer hidden by chronic otitis media--a case report].

    Science.gov (United States)

    Wierzbicka, Małgorzata; Gawecki, Wojciech; Leszczyńska, Małgorzata; Kopeć, Tomasz

    2008-01-01

    The authors would like to present a rare case of the middle ear cancer which has been developed in postoperative cave in 67 years old patient operated for cholesteatoma 50 years earlier. The patient was admitted to the ENT Department of Poznań University of Medical Sciences because of the ear suppuration and headache occurring for 3 months. CT and MR images suggested granulation tissue filling the postoperative spaces with bone destruction, infiltration of the dura and temporal lobe abscess formation. Intraoperative findings allowed excluding the preliminary diagnosis of intracranial complication in the course of chronic otitis media, revealing the tissue masses resembling neoplastic infiltration. The histopathology examination confirmed the final diagnosis of squamous cell cancer. The patient was directed to radiotherapy. The authors report a case of middle ear squamous cell carcinoma and discuss its diagnostic aspect. PMID:19205537

  10. Silicone impression material foreign body in the middle ear: Two case reports and literature review.

    Science.gov (United States)

    Suzuki, Nobuyoshi; Okamura, Koji; Yano, Takuya; Moteki, Hideaki; Kitoh, Ryosuke; Takumi, Yutaka; Usami, Shin-ichi

    2015-10-01

    We report two cases of impression material foreign body in the middle ear. The first case had been affected with chronic otitis media. The silicone flowed into the middle ear through a tympanic membrane perforation during the process of making an ear mold. About 4 years and 8 months after, the patient had severe vertigo and deafness. We found bone erosion of the prominence of the lateral semicircular canal and diagnosed labyrinthitis caused by silicone impression material. In the second case silicone flowed into the canal wall down mastoid cavity. Both cases required surgery to remove the foreign body. The clinical courses in such cases are variable and timing of surgery is sometimes difficult. In addition to reporting these two cases, we present here a review of the literature regarding impression material foreign bodies. PMID:25956272

  11. Clinical investigation of flat panel CT following middle ear reconstruction: a study of 107 patients

    International Nuclear Information System (INIS)

    After middle ear reconstruction using partial or total ossicular replacement prostheses (PORP/TORP), an air-bone gap (ABG) may persist because of prosthesis displacement or malposition. So far, CT of the temporal bone has played the main role in the diagnosis of reasons for postoperative insufficient ABG improvement. Recent experimental and clinical studies have evaluated flat panel CT (fpCT) as an alternative imaging technique that provides images with high isovolumetric resolution, fewer metal-induced artefacts and lower irradiation doses. One hundred and seven consecutive patients with chronic otitis media with or without cholesteatoma underwent reconstruction by PORP (n = 52) or TORP (n = 55). All subjects underwent preoperative and postoperative audiometric testing and postoperative fpCT. Statistical evaluation of all 107 patients as well as the sole sub-assembly groups (PORP or TORP) showed a highly significant correlation between hearing improvement and fpCT-determined prosthesis position. FpCT enables detailed postoperative information on patients with middle ear reconstruction. FpCT is a new imaging technique that provides immediate feedback on surgical results after reconstructive middle ear surgery. Specific parameters evaluated by fpCT may serve as a predictive tool for estimated postoperative hearing improvement. Therefore this imaging technique is suitable for postoperative quality control in reconstructive middle ear surgery. (orig.)

  12. Short term and long term subjective taste disorder after middle ear cleft surgery

    Directory of Open Access Journals (Sweden)

    Ayaz Rehman

    2013-01-01

    Full Text Available Aim: The present study is a prospective study that looks into the prevalence of chorda tympani nerve injury and related symptoms following varying degrees of trauma to the nerve during four common types of middle-ear operations; namely, Tympanomastoid operations, myringoplasty, Tympanoplasty and Exploratory tympanotomy. Materials and Methods: 178 patients who underwent middle ear cleft surgery were included in this prospective study. Childrens below 20 years and patients with other potential cause of taste disturbance were excluded. Patients were given a single questionnaire, so as to assess their post-operative taste disturbance. Patient name, Age, Sex, Type of middle ear surgery, side of surgery were recorded. Any change in sense of taste immediately (after 2-4 weeks or delayed (2-3 yearswere recorded. Results: The number of patients with Chorda tympani nerve-related symptoms varied widely between these four groups. Increased occurrence of the nerve related symptoms were observed in Tympanomastoid and Myringoplasty, and a prolonged recovery time were observed in the tympanomastoid group. Stretching of the nerve produced more symptomatic cases than thermal injury or drying. Conclusion: It is important to inform patients about the possibility of Chorda Tympani Nerve injury during middle-ear operations, and it should also be emphasized that symptoms related to Chorda Tympani Nerve injury can occur irrespective of the type of damage to the nerve.

  13. Clinical investigation of flat panel CT following middle ear reconstruction: a study of 107 patients

    Energy Technology Data Exchange (ETDEWEB)

    Zaoui, K. [University Hospital Heidelberg, Ruprecht Karls University, Department of Otorhinolaryngology, Head and Neck Surgery, Heidelberg (Germany); Kromeier, J. [St. Josefs Hospital, RkK, Department of Radiology, Freiburg (Germany); Neudert, M.; Beleites, T.; Zahnert, T. [University Hospital Dresden, Technical University, Department of Otorhinolaryngology, Head and Neck Surgery, Dresden (Germany); Laszig, R.; Offergeld, C. [University Hospital Freiburg, Albert Ludwigs University, Department of Otorhinolaryngology, Head and Neck Surgery, Freiburg (Germany)

    2014-03-15

    After middle ear reconstruction using partial or total ossicular replacement prostheses (PORP/TORP), an air-bone gap (ABG) may persist because of prosthesis displacement or malposition. So far, CT of the temporal bone has played the main role in the diagnosis of reasons for postoperative insufficient ABG improvement. Recent experimental and clinical studies have evaluated flat panel CT (fpCT) as an alternative imaging technique that provides images with high isovolumetric resolution, fewer metal-induced artefacts and lower irradiation doses. One hundred and seven consecutive patients with chronic otitis media with or without cholesteatoma underwent reconstruction by PORP (n = 52) or TORP (n = 55). All subjects underwent preoperative and postoperative audiometric testing and postoperative fpCT. Statistical evaluation of all 107 patients as well as the sole sub-assembly groups (PORP or TORP) showed a highly significant correlation between hearing improvement and fpCT-determined prosthesis position. FpCT enables detailed postoperative information on patients with middle ear reconstruction. FpCT is a new imaging technique that provides immediate feedback on surgical results after reconstructive middle ear surgery. Specific parameters evaluated by fpCT may serve as a predictive tool for estimated postoperative hearing improvement. Therefore this imaging technique is suitable for postoperative quality control in reconstructive middle ear surgery. (orig.)

  14. Comparison of different computed tomography post-processing modalities in assessment of various middle ear disorders.

    Science.gov (United States)

    Mehanna, Ahmed Mohamed; Baki, Fatthi Abdel; Eid, Mohamed; Negm, Magdy

    2015-06-01

    Several anatomic structures of the middle ear are not optimally depicted in the standard axial and coronal planes. Several 2D and 3D image-processing modalities are currently available for CT examinations in clinical radiology departments. Till now 3D reconstructions of the temporal bone have not been widely used yet, and attracted only academic interest. The aim of this study was to compare axial (source images), 2D and 3DCT post-processing modalities, and to evaluate the value of 3D reconstructed images/virtual endoscopy (VE) in assessment of various middle ear disorders for identification of the best modality/view for assessment of a particular middle ear structure or pathology. 40 patients with various middle ear disorders, planned for surgical intervention were included in prospective study. Multi-slice CT was performed for all patients. Scans were acquired in the axial plane. The axial source datasets were utilized for generation of 2D reformations and 3D reconstructed images. All studied images were divided into three categories: axial (source images), 2D reformations (MPR and sliding-thin-slab MIP) and 3D reconstruction (virtual endoscopy). The visibility of middle ear structures and pathologies with each modality were scored qualitatively using three-point scoring system in reference to operative findings. Stapes superstructure and footplate, incudostapedial joint, oval and round windows, tympanic segment of the facial nerve and tegmen were not optimally depicted in the axial plane. Sinus tympani and facial recess were best visualized with axial images or VE. 3D reconstruction/VE allowed good visualization of all parts of ossicular chain except stapes superstructure. Regarding pathologic changes, 2D reformations and 3D reconstructed images allowed better visualization of erosion of ossicles and tegmen. 3D reconstruction/VE did not allow detection of foci of otospongiosis. 2D reformations can be considered the mainstay in assessment of most middle ear

  15. CT and MR imaging after middle ear surgery.

    Science.gov (United States)

    Kösling, S; Bootz, F

    2001-11-01

    This article describes the current value of imaging in patients after stapes surgery and surgery after chronic otitis media including cholesteatoma. Possibilities and limits of computed tomography (CT) and MRI are described and most important investigation parameters are mentioned. After otosclerosis surgery, CT is the method of first choice in detection of reasons for vertigo and/or recurrent hearing loss in the later postoperative phase. CT may show the position and condition of prosthesis, scarring around the prosthesis and otospongiotic foci. Sometimes, it gives indirect hints for perilymphatic fistulas and incus necrosis. MRI is able to document inner ear complications. CT has a high negative predictive value in cases with a free cavity after mastoidectomy. Localized opacities or total occlusion are difficult to distinguish by CT alone. MRI provides important additional information in the differentiation of cholesterol granuloma, cholesteatoma, effusion, granulation and scar tissue. PMID:11704358

  16. CT and MR imaging after middle ear surgery

    International Nuclear Information System (INIS)

    This article describes the current value of imaging in patients after stapes surgery and surgery after chronic otitis media including cholesteatoma. Possibilities and limits of computed tomography (CT) and MRI are described and most important investigation parameters are mentioned. After otosclerosis surgery, CT is the method of first choice in detection of reasons for vertigo and/or recurrent hearing loss in the later postoperative phase. CT may show the position and condition of prosthesis, scarring around the prosthesis and otospongiotic foci. Sometimes, it gives indirect hints for perilymphatic fistulas and incus necrosis. MRI is able to document inner ear complications. CT has a high negative predictive value in cases with a free cavity after mastoidectomy. Localized opacities or total occlusion are difficult to distinguish by CT alone. MRI provides important additional information in the differentiation of cholesterol granuloma, cholesteatoma, effusion, granulation and scar tissue

  17. CT and MR imaging after middle ear surgery

    Energy Technology Data Exchange (ETDEWEB)

    Koesling, Sabrina E-mail: sabrina.koesling@medizin.uni-halle.de; Bootz, F

    2001-11-01

    This article describes the current value of imaging in patients after stapes surgery and surgery after chronic otitis media including cholesteatoma. Possibilities and limits of computed tomography (CT) and MRI are described and most important investigation parameters are mentioned. After otosclerosis surgery, CT is the method of first choice in detection of reasons for vertigo and/or recurrent hearing loss in the later postoperative phase. CT may show the position and condition of prosthesis, scarring around the prosthesis and otospongiotic foci. Sometimes, it gives indirect hints for perilymphatic fistulas and incus necrosis. MRI is able to document inner ear complications. CT has a high negative predictive value in cases with a free cavity after mastoidectomy. Localized opacities or total occlusion are difficult to distinguish by CT alone. MRI provides important additional information in the differentiation of cholesterol granuloma, cholesteatoma, effusion, granulation and scar tissue.

  18. Design of Floating Mass Type Piezoelectric Actuator for Implantable Middle Ear Hearing Devices

    Institute of Scientific and Technical Information of China (English)

    LIU Houguang; TA Na; MING Xiaofeng; RAO Zhushi

    2009-01-01

    To overcome some of the problems inherent in conventional hearing aids such as low gain at high frequencies due to acoustic feedback, discomfort in occlusion of the external ear canal and so on, implantable middle ear hearing devices (IMEHDs) have been developed over the past two decades. For such kinds of IMEHDS, this paper presents the design of a floating mass piezoelectric actuator using a PMN-30%PT stack as a new type of vibrator. The proposed piezoelectric actuator consists of only three components of a piezoelectric stack, a metal case and a clamp. For the purpose of aiding the design of this actuator, a coupling biomechanics model of human middle ear and the piezoelectric actuator was constructed. This model was built based on a complete set of computerized tomography section images of a healthy volunteer's left ear by reverse engineering technology. The validity of this model was confirmed by comparing the motion of the tympanic membrane and stapes footplate obtained by this model with published experimental measurements on human temporal bones. It is shown that the designed actuator can be implanted on the incus long process by a simple surgical operation, and the stapes footplate displacement by its excitation at 10.5 V root-mean-square(RMS) voltage was equivalent to that from acoustic stimulation at 100 dB sound pressure level(SPL), which is adequate stimulation to the nssicular chain. The corresponding power consumption is 0.04 mW per volt of excitation at 1 kHz, which is low enough for the transducer to be used in an implantable middle ear device.

  19. Bone conduction responses of middle ear structures in Thiel embalmed heads

    Science.gov (United States)

    Arnold, Andreas; Stieger, Christof; Caversaccio, Marco; Kompis, Martin; Guignard, Jérémie

    2015-12-01

    Thiel-embalmed human whole-head specimens offer a promising alternative model for bone conduction (BC) studies of middle ear structures. In this work we present the Thiel model's linearity and stability over time as well as its possible use in the study of a fixed ossicle chain. Using laser Doppler vibrometry (LDV), the motion of the retroauricular skull, the promontory, the stapes footplate and the round window (RW) were measured. A bone-anchored hearing aid stimulated the ears with step sinus tones logarithmically spread between 0.1 and 10 kHz. Linearity of the model was verified using input levels in steps of 10 dBV. The stability of the Thiel model over time was examined with measurements repeated after hours and weeks. The influence of a cement-fixed stapes was assessed. The middle ear elements measured responded linearly in amplitude for the applied input levels (100, 32.6, and 10 mV). The variability of measurements for both short- (2 h) and long-term (4-16 weeks) repetitions in the same ear was lower than the interindividual difference. The fixation of the stapes induced a lowered RW displacement for frequencies near 750 Hz (-4 dB) and an increased displacement for frequencies above 1 kHz (max. +3.7 dB at 4 kHz). LDV assessment of BC-induced middle ear motion in Thiel heads can be performed with stable results. The vibratory RW response is affected by the fixation of the stapes, indicating a measurable effect of ossicle chain inertia on BC response in Thiel embalmed heads.

  20. [Clinical evaluation of congenital cholesteatoma of the middle ear].

    Science.gov (United States)

    Kikuchi, Masahiro; Yamamoto, Etsuo; Shinohara, Shogo; Shiomi, Yousaku; Fujiwara, Keizo; Shiomi, Yoshiko; Watanabe, Futoshi; Tanabe, Makito

    2003-08-01

    We conducted a retrospective study to identify the clinical features and surgical observations of congenital cholesteatoma. Sixty patients were diagnosed and underwent surgery for congenital cholesteatoma between April 1987 and May 2002. All diagnoses were made on the basis of two operative findings: 1. the tympanic membrane manifested neither retraction, perforation, nor granulation. 2. the tympanic membrane was not continuous with the cholesteatoma. In this series, congenital cholesteatoma accounted for 7% of all cholesteatomas (853 ears). The patient age ranged from 2 to 48 years. The male to female ratio was 4:1. Seventeen patients had multiple cholesteatoma. Fifty-three patients exhibited closed-type cholesteatomas, while the remaining 7 patients had open-type cholesteatomas that had formed as a flat surface of the epidermis. Patients with open-type cholesteatomas presented with a much more pronounced conductive hearing loss and ossicular erosion or malformation. Twenty-two patients with relatively small cholesteatomas were analyzed to estimate the origin of their cholesteatomas. Of the 22 patients, 13 had anterior superior quadrant (ASQ-type) and 9 had posterior superior quadrant (PSQ-type) cholesteatomas. The mean age at the time of detection was older in the PSQ-type group than in the ASQ-type group and the frequency of ossicular erosion or malformation was more prominent in the PSQ-type group than in the ASQ-type group. The primary site of origin was thought to be the portion between the tympanic ostium of the auditory canal and the semicanal for tensor tympani in the ASQ-type group and near the incudostapedial joint in the PSQ-type group. A planned staged procedure was performed in 29 patients, 15 patients (52%) had residual lesions situated mostly on the oval window, the round window, an exposed facial nerve or an exposed lateral semicircular canal. The frequency of residual lesions in patients who presented with extended, multiple cholesteatoma and

  1. Middle ear adenoma with neuroendocrine differentiation: relate of two cases and literature review

    Science.gov (United States)

    Bittencourt, Aline Gomes; Tsuji, Robinson Koji; Cabral, Francisco; Pereira, Larissa Vilela; Fonseca, Anna Carolina de Oliveira; Alves, Venâncio; Bento, Ricardo Ferreira

    2013-01-01

    Summary Introduction: Adenomas with neuroendocrine differentiation are defined as neuroendocrine neoplasms, and they are rarely found in the head and neck. Objective: To describe two cases of a middle ear adenoma with neuroendocrine differentiation, with a literature review. Case Report: Patient 1 was a 41-year-old woman who presented with a 3-year history of left aural fullness associated with ipsilateral “hammer beating” tinnitus. Patient 2 was a 41-year-old male who presented with unilateral conductive hearing loss. Conclusion: Adenoma with neuroendocrine differentiation of the middle ear is a rare entity, but it should be considered in patients with tinnitus, aural fullness, and a retrotympanic mass and remembered as a diferential diagnosis of tympanic paraganglioma. PMID:25992031

  2. Study Of The Effect Of Nasal- Septal Deviation On The Middle Ear Pressure

    Directory of Open Access Journals (Sweden)

    Motesaddi Zarandi M

    2003-10-01

    Full Text Available Eustachian tube connects middle ear space to the nasopharyngeal space. Upper airway obstruction, with any cause, can derange Eustachian tube function. Nasal septal deviation is one of the prevalent causes of upper airway obstruction which can affects the ventilation function of Eustachian tube."nMaterials and Methods: This study was conducted on the patients who underwent septoplasty due to severe septal deviation leading to unilateral nasal obstruction in Amiraalam hospital from summer of 1378 till the spring of 1379."nResults: There was 140 patients whose data were as: female patients 34 (24.3% male patients 106 (75.7%, mean age (22.7. Median age (20 years and mode of age (18 years of age. they were from 12 to 40 years of age."nConclusion: Comparison between preoperative and postoperative middle ear pressures shows no any significant statistical difference (p=0.798.

  3. Effects of changes in dynamic characteristics of the middle ear on transient-evoked otoacoustic emissions

    Directory of Open Access Journals (Sweden)

    Špirić Sanja

    2011-01-01

    Full Text Available Transient-evoked otoacoustic emissions are transmitted through the middle ear. The purpose of this study was to investigate the effects of dynamic properties of the transmission system on the measurability of transient otoacoustic emissions. The authors analyzed the presence of transient otoacoustic emissions in 48 children with serous otitis media regarding the tympanogram, presence and type of effusion and pure tone average findings. The results obtained in this research show the predominant absence of transient otoacoustic emissions in patients with type B tympanogram (69.1% especially if the effusion is mucoid (77.5% with the hearing loss of 15 decibel hearing level. This research shows that disorders in dynamic characteristics of the middle ear in patients with serous otitis obstruct the transmission of acoustic energy and affect the measurability of transient otoacoustic emissions, especially if the effusion is mucoid and hearing loss of 15 decibel hearing level.

  4. Evaluation of Middle Ear Ventilation after Tympanoplasty by Xe-133 Scintigraphy

    OpenAIRE

    Ortapamuk, Hülya; Korkmaz, Hakan; Öztürk, Zeynel

    2008-01-01

    Aim: Eustachian tube is considered to have important role in the normal physiology of middle ear, as well as in the success of tympanoplasty operations. The study was designed prospectively to reveal the role of Xe-133 ventilation scintigraphy in the determination of eustachian tube (ET) function. Materials and Methods: Thirteen patients who underwent successful tympanoplasty with intact graft and 5 healthy volunteers were included in this study. Xe-133 insufflation into nasopharynx was don...

  5. Middle ear myoclonus: a new technique for suppression of spontaneous clicking tinnitus.

    Science.gov (United States)

    Chan, Chung; Palaniappan, Rudrapathy

    2010-01-01

    Middle ear myoclonus is one of the causes of clicking tinnitus and can be psychologically distressing. Current management of intractable clicking includes medication or tenotomy. Two cases with spontaneous intrusive irregular clicking are presented where relief and a sense of control were obtained using non-invasive self - administered zygomatic pressure. This technique may be useful in selected patients before resorting to medication or tenotomy. PMID:21609914

  6. Bilateral use of Active Middle Ear Implants: Speech Discrimination Results in Noise

    OpenAIRE

    Wolf-Magele, A; Koci, V; Sprinzl, G; Zorowka, P; Riechelmann, H.; Schnabl, J

    2016-01-01

    Background: Binaural sound reception has advantages over unilateral perception, including better localization and sound quality as well as speech and tone reception in both quiet and noisy environments. Up to now, most active middle ear implant (AMEI) users have been unilaterally implanted, but patient demand for an implant on the other side is increasing.Material & Methods: Ten bilaterally-AMEI implanted native German-speaking adults were included in the study. The Oldenburg sentence test...

  7. Ear barotrauma

    Science.gov (United States)

    Barotitis media; Barotrauma; Ear popping; Pressure-related ear pain; Eustachian tube dysfunction ... The air pressure in the middle ear is most often the same as the air pressure outside of the body. The Eustachian tube is a connection between the middle ...

  8. Ear Tubes

    Science.gov (United States)

    ... of the ear drum or eustachian tube, Down Syndrome, cleft palate, and barotrauma (injury to the middle ear caused by a reduction of air pressure, ... specialist) may be warranted if you or your child has experienced repeated ... fluid in the middle ear, barotrauma, or have an anatomic abnormality that ...

  9. Prophylactic antiemetic effects of midazolam, dexamethasone, and its combination after middle ear surgery

    International Nuclear Information System (INIS)

    To evaluate and compare the efficacy of the combination of midazolam and dexamethasone, with midazolam and dexamethasone alone, for the prevention of postoperative nausea and vomiting (PONV) in female patients undergoing middle ear surgery. A prospective, randomized, double-blind, placebo-controlled study in 80 female patients (mean age 32.6 years), undergoing middle ear surgery with general anesthesia at Ohud Hospital, Madina, Kingdom of Saudi Arabia from May 2007 to May 2008. Patients were classified into 4 groups. They received intravenous normal saline (S group), midazolam 0.075 mg/kg (M group), or dexamethasone 10 mg (D group), or a combination of midazolam and dexamethasone (MD group), before the induction of anesthesia. Postoperatively for 24 hours observation and assessment of nausea, vomiting, rescue anti-emetics, and side effects of the study drugs such as headache and drowsiness were carried out. There was a significant difference between the 4 groups. The MD group was the least to develop PONV compared to other groups (p<0.01). Regarding nausea, there was a non-significant difference between the 4 groups, although the MD group developed the least symptoms among the 4 groups, there were no significant differences in pain intensity and side effects such as, headache, dizziness, and drowsiness between the 4 groups. The combination of midazolam 0.075 mg/kg and dexamethasone 10 mg intravenously is better than either drug alone in reducing the incidence of PONV in female patients after middle ear surgery. (author)

  10. Limited cone-beam computed tomography imaging of the middle ear: a comparison with multislice helical computed tomography

    International Nuclear Information System (INIS)

    Purpose: To determine the applicability of cone-beam computed tomography (CBCT) in otological imaging, and to compare its accuracy with the routinely used multislice helical CT (MSCT) for imaging of the middle- and inner-ear areas. Material and Methods: Thirteen unoperated human cadaver temporal bones were imaged with CBCT and MSCT. Sixteen landmarks of the middle and adjacent inner ear were evaluated and compared for their conspicuity according to a modified Likert scale. Total scores and scores for subgroups including landmarks of specific clinical interest were also compared. Results: No significant differences were found between the imaging techniques or subgroups when scores of individual structures were compared. While the middle ear itself was visible in all cases with CBCT, parts of the inner ear were 'cut off' in four cases due to the limited field of view. For the same reason, the evaluation of the whole mastoid was not possible with CBCT. The cochlear and vestibular aqueducts were not visualized in either CT techniques. The contrast-to-noise ratio was more than 50% lower in CBCT than in MSCT, but still adequate for diagnostic task. Conclusion: CBCT proved to be at least as accurate as routinely used MSCT in revealing the clinically and surgically important middle-ear structures. The results show that high-quality imaging of the middle ear is possible with the current CBCT device

  11. Limited cone-beam computed tomography imaging of the middle ear: a comparison with multislice helical computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Peltonen, L.I.; Aarnisalo, A.A.; Kortesniemi, M.K.; Suomalainen, A.; Jero, J.; Robinson, S. [Dept. of Otorhinolaryngology and Dept. of Radiology, Helsinki Univ. Central Hospital (Finland)

    2007-02-15

    Purpose: To determine the applicability of cone-beam computed tomography (CBCT) in otological imaging, and to compare its accuracy with the routinely used multislice helical CT (MSCT) for imaging of the middle- and inner-ear areas. Material and Methods: Thirteen unoperated human cadaver temporal bones were imaged with CBCT and MSCT. Sixteen landmarks of the middle and adjacent inner ear were evaluated and compared for their conspicuity according to a modified Likert scale. Total scores and scores for subgroups including landmarks of specific clinical interest were also compared. Results: No significant differences were found between the imaging techniques or subgroups when scores of individual structures were compared. While the middle ear itself was visible in all cases with CBCT, parts of the inner ear were 'cut off' in four cases due to the limited field of view. For the same reason, the evaluation of the whole mastoid was not possible with CBCT. The cochlear and vestibular aqueducts were not visualized in either CT techniques. The contrast-to-noise ratio was more than 50% lower in CBCT than in MSCT, but still adequate for diagnostic task. Conclusion: CBCT proved to be at least as accurate as routinely used MSCT in revealing the clinically and surgically important middle-ear structures. The results show that high-quality imaging of the middle ear is possible with the current CBCT device.

  12. Three-dimensional CT of the ossicles of the middle ear

    International Nuclear Information System (INIS)

    This study was performed to evaluate the usefulness and limitations of three-dimensional (3-D) imaging of the ossicular chain in the middle ear by high speed helical CT. One dissected human temporal bone, five normal ears, and twelve diseased ears (trauma, ossicular anomaly, cholesteatoma, chronic otitis media) were scanned in 1.0 mm slices and reconstructed at a thickness of 0.2-0.5 mm. All 3-D CT specimens can be observed in any plane and from any direction. Ossicular 3-D CT temporal bone images were reconstructed as if the malleus, incus and stapes were being observed under a microscope. No defect in the ossicles or their joints was seen in the images. The entire structure of the stapes could not be represented by conventional two-dimensional CT, but the 3-D CT in our study showed the head, crus and foot plate of the stapes in detail. Ossicular 3-D CT images of normal ears yielded the same findings as those recorded in the temporal bone. Preoperative diagnostic findings of ossicles in diseased ears were very useful. 3-D CT was diagnostic and its accuracy was confirmed by surgical observations, especially in ossicular anomalies. 3-D CT was also an important method of postoperative evaluation of ossicular reconstruction, i.e. TORP and PORP. It could represent the anatomical relation between prosthesis and the oval window. Postoperative hearing improvement can be compared with 3-D CT findings. High-speed helical CT can scan an object more quickly and clearly than conventional CT, and its biological damage in humans is less than that of other methods. 3-D CT allows obviously clearer reconstruction by helical CT than the other methods. (author)

  13. UTILITY OF VIBRANT SOUNDBRIDGE IN PATIENTS WITH CONGENITAL MIDDLE AND OUTER EAR DEFORMITIES

    Institute of Scientific and Technical Information of China (English)

    ZOU; Yihui; LI; Jianan; CHEN; Aiting; DAI; Bu; HAN; Dongyi; LIU; Huizhan; YANG; Shiming

    2012-01-01

    Objective To report use of the Vibrant Soundbridge (VSB) in patients with congenital deformation of the middle and outer ears and investigate its utility in this patient population.Method Four patients with congenital deformation of middle and outer ears underwent VSB implantation. All were male (aged 3-18 years,average 13.5 years) and operated on the left side.Malformation was bilateral in 3 patients and unilateral in 1 patient. Surgical techniques were modified to accommodate each patient’s unique conditions and needs.The implant site was approached via the facial recess in 3 patients and through a retro-facial nerve route in 1 patient. The VSB implant was connected to either the stapes (2 cases) or the round window (2 cases).Pure tone and speech audiometry results and daily communication capabilities before and after VSB activation were compared.Results The operations were successful in all patients, with no complications. The patient communication level improved significantly after VSB activation. Average air conduction pure tone threshold or conditioned reflex audiometry threshold improved by 35 dB in the 0.25-4 kHz range,from 69 dB HL before VSB activation to 34 dB HL after.The sentence recognition rate in quiet at 65 dB SPL went up to 86% from 0% without VSB for patients with bilateral deformation and remained at 100% for the patient with unilateral deformity. However, for the latter patient, the rate improved to 20% from 0% without VSB in noise (-8 dB SNR).Conclusion VSB is an excellent solution for improving hearing in patients with congenital deformation of middle and outer ears.Operation can be completed and good results can be achieved even in patients with unique conditions and needs.

  14. Prophylactic antiemetic effects of Midazolam, Ondansetron, and their combination after middle ear surgery

    OpenAIRE

    Honarmand, Azim; Safavi, Mohammadreza; Chegeni, Mansoureh; Hirmanpour, Anahita; Nazem, Masoud; Sarizdi, Seyyad Hamid

    2016-01-01

    Objective: The purpose of the present study was to evaluate the efficacy of midazolam-ondansetron combination in prevention of postoperative nausea and vomiting (PONV) after middle ear surgery and its comparison with using midazolam or ondansetron alone. Methods: One hundred and forty patients were enrolled in four groups to receive midazolam 0.75 mg/kg in group M, ondansetron 4 mg in group O, midazolam 0.75 mg/kg and ondansetron 4 mg in group MO, and saline 0.90% in group S intravenously jus...

  15. Middle ear mechanics and progress in cochlear modeling: A moderated discussion

    Science.gov (United States)

    Allen, Jont B.; Nakajima, Hideko Heidi; O'Maoiléidigh, Dáibhid

    2015-12-01

    The following is an edited transcript of a recorded discussion session on the topics of "Middle Ear Mechanics" and "Progress in Cochlear Modeling". The discussion, moderated by the authors, took place at the 12th International Workshop on the Mechanics of Hearing held at Cape Sounio, Greece, in June 2014. All participants knew that the session was being recorded. In view of both the spontaneous nature of the discussion and the editing, however, this transcript may not represent the considered or final views of the participants, and may not represent a consensus of experts in the field. The reader is advised to consult additional independent publications.

  16. CT and MRI diagnosis of primary middle ear carcinoma invading jugular foramen

    International Nuclear Information System (INIS)

    Objective: To study the CT and MRI features of primary middle ear carcinoma invading jugular foramen. Methods: CT and MRI images of 7 patients with surgically and pathologically confirmed primary middle ear carcinoma invading jugular foramen were analyzed retrospectively, including high resolution CT (HRCT) scan in 6 cases, CT enhancement scan in 1 case and MR plain and enhancement scan in 7 cases. Results: On HRCT, the soft tissue lesions mainly located in tympanum, tympanic sinus, the deep of external auditory canal and jugular foramen, and irregular 'moth-eaten' bone destruction could be seen, including the destruction of jugular foramen in 7 cases, eustachian tube in 7 cases, facial nerve canal in 4 cases, carotid artery canal in 4 cases, external auditory canal wall in 3 cases, auditory ossicles in 2 cases, vestibular window and horizontal semicircular canal in 1 case. CT plain scan showed the density of soft tissue mass was uniform in 4 cases with CT value of 30-55 HU, and heterogeneous in 2 cases, in which small pieces high density lesions could be found. CT enhancement scan in 1 case revealed moderate and homogeneous enhancement. On MR plain scan, the soft tissue masses with hazy margins could be seen, and compared to the gray matter of brain, the lesions were isointense or slightly hypointense on T1WI and isointense or slightly hyperintense on T2WI. The signal was homogeneous in 5 cases and inhomogeneous in 2 cases with small pieces of hypointensity both on T1WI and T2WI. After enhancement, the lesions were enhanced moderately and homogeneously in 5 cases and inhomogeneously in 2 cases with small pieces of non enhanced area. MRI also showed the erosion of carotid artery in 4 cases, sigmoid sinus in 1 case. Conclusion: The primary middle ear carcinoma can invade the jugular foramen area extensively, which may lead to misdiagnosis. HRCT can precisely depict the bone destruction and the invasion of the important anatomic structures in the primary middle ear

  17. Mucin gene 19 (MUC19) expression and response to inflammatory cytokines in middle ear epithelium

    OpenAIRE

    Kerschner, Joseph E.; Khampang, Pawjai; Erbe, Christy B.; Kolker, Alexander; Cioffi, Joseph A.

    2009-01-01

    Mucin gene 19 (MUC19) has been identified as a major gel-forming mucin in the human middle ear (ME). The objectives of this investigation were to characterize the expression and assess the regulation of MUC19 in the ME cell culture models utilized in the study of otitis media (OM). Findings demonstrate that MUC19 is expressed in both human immortalized cell culture (HMEEC) and chinchilla primary epithelial culture (CMEEC). ME exposure to inflammatory cytokines TNF-α, IL-1β, IL-6 and IL-8 up-r...

  18. Middle ear capillary haemangioma: Review of literature and appraisal of management options.

    Science.gov (United States)

    Salamat, Ali A; Casselden, Elizabeth; Theaker, Jeffrey; Batty, Vincent; Thomas, Sebastian

    2016-12-01

    Infantile middle ear capillary haemangiomas (MECH) are a rare entity with only five reported cases in the literature. At present there is no consensus regarding the management of such lesions. Extra-cutaneous haemangiomas have been successfully managed with oral propranolol but not yet reported in MECH. We present a further case and appraise the management options. At present oral propranolol has not been used in the treatment of MECH. The literature suggests that infantile MECH have a higher propensity to spontaneously involute and a greater likelihood of response to propranolol. Surgical excision is the best option in older children and adults. PMID:26992272

  19. Simulations and Measurements of Human Middle Ear Vibrations Using Multi-Body Systems and Laser-Doppler Vibrometry with the Floating Mass Transducer

    OpenAIRE

    Tobias Strenger; Stefan Lehner; Frank Böhnke; Theodor Bretan

    2013-01-01

    The transfer characteristic of the human middle ear with an applied middle ear implant (floating mass transducer) is examined computationally with a Multi-body System approach and compared with experimental results. For this purpose, the geometry of the middle ear was reconstructed from μ-computer tomography slice data and prepared for a Multi-body System simulation. The transfer function of the floating mass transducer, which is the ratio of the input voltage and the generated force, is deri...

  20. Determinants of sensorineural hearing loss in chronic middle-ear disease.

    Science.gov (United States)

    Kasliwal, Neeraj; Joshi, Sanjeev; Pareek, S M

    2004-10-01

    A statistical study was carried out on SNHL in CSOM. The study group consisted of 1,828 patients suffering from CSOM who underwent surgery at our centre from 1982 to 2001, out of these 510 cases with unilateral CSOM were selected for this study by a strict selection criteria so as to eliminate covariables such as exposure to acoustic trauma, head injury, previous ear surgery and hereditary causes. The healthy ear served as control. We determined the average SNHL in relation to the age of onset, duration of disease, examining it in relation to other eventual aural complications such as cholesteatoma, ossicular chain erosion und otorrhea.On the basis of data obtained we observed consistent co-relation between severity of SNHL and duration of the disease, presence of cholesteatoma, ossicular erosion, attic and subtotal perforations. These findings suggest that more severe middle ear disease may result in SNHL and thus early intervention in cases of chronic suppurative Otitis media is desired. PMID:23120094

  1. Dosimetric analysis of the use of CBCT in diagnostic radiology: sinus and middle ear

    International Nuclear Information System (INIS)

    The use of cone beam computed tomography (CBCT) in diagnostic radiology departments is increasing. Several discussions arise whether with the CBCT application, some multi-slice CT (MSCT) examinations can be replaced by it. High hopes are set regarding the dosimetric aspects of CBCT: are patient doses in between those of conventional X-rays and MSCT? In this study, effective dose and organ doses were evaluated for two non-dental CBCT examinations: sinus and middle ear. A comparison with the dose obtained with a MSCT protocol was performed. Moreover, the sinus examination was also compared with the dose obtained by projection radiography (RX). Effective doses were estimated from thermoluminescent detector dose measurements in an anthropomorphic phantom and were compared against Monte Carlo simulations. Results show that the effective dose for the sinus examination is more than three times higher with MSCT than with CBCT and about five times lower with RX compared with CBCT, whereas for the middle ear examination, the effective dose obtained with MSCT is almost six times higher than that of CBCT. Finally, a sensitivity study on the size and position of the CBCT field of view showed the influence of these two factors on the dose received by the patient. (authors)

  2. Pediatric middle ear cholesteatoma: the comparative study of congenital cholesteatoma and acquired cholesteatoma.

    Science.gov (United States)

    Morita, Yuka; Yamamoto, Yutaka; Oshima, Shinsuke; Takahashi, Kuniyuki; Takahashi, Sugata

    2016-05-01

    This study examined the differences between congenital cholesteatoma (CC) and acquired cholesteatomas (AC) in children by comparing clinical features and treatment courses. This was a retrospective study which retrospectively evaluated 127 children with middle ear cholesteatomas using medical records from January 1999 to December 2012 in the Department of Otolaryngology, Niigata University Hospital. The study comprised 69 and 58 cases of CC and AC, respectively. The main outcome measures include patient backgrounds, the opportunities for consultations, mastoid cell development, intraoperative finding of stapes, surgical procedure and number of surgeries. The average age at operation was 6.4 and 9.8 years in CC and AC, respectively. AC was more prevalent in boys. Mastoid development was better in CC than in AC. We adopted a two-stage operation in 17 cases (25 %) of CC and in 22 cases (38 %) of AC. The repeat surgery rate was 11.6 % in CC and 27.6 % in AC. Three times as many operations were required for three cases (4.3 %) of CC and 10 cases (17.2 %) of AC. The lesions in AC were more difficult to control. In the treatment of pediatric middle ear cholesteatoma, we had to keep the outcome in mind. PMID:26044405

  3. Effect of middle-ear pathology on high-frequency ear-canal reflectance measurements in the frequency and time domains

    Science.gov (United States)

    Merchant, Gabrielle R.; Siegel, Jonathan H.; Neely, Stephen T.; Rosowski, John J.; Nakajima, Hideko H.

    2015-12-01

    Wideband immittance and reflectance have not been well described at frequencies above 6-8 kHz, and past analyses of these measurements have focused on the responses to stimulus frequencies below 3-4 kHz, while ignoring high-frequency or time-domain information. This work uses a novel approach to measure reflectance that utilizes high-frequency signals and analyzes reflectance in both the frequency and the time domains. Experiments were performed with fresh normal human temporal bones before and after simulating various middle-ear pathologies. In addition to experimental data, novel model analyses were used to obtain fitted parameter values of middle-ear elements that vary systematically due to simulations and thus may have diagnostic implications. Our results show that high-frequency measurements improve temporal resolution of reflectance measurements, and this data combined with novel modeling techniques provides separation of three major conductive pathologies.

  4. Comparison of advanced optical imaging techniques with current otolaryngology diagnostics for improved middle ear assessment (Conference Presentation)

    Science.gov (United States)

    Nolan, Ryan M.; Shelton, Ryan L.; Monroy, Guillermo L.; Spillman, Darold R.; Novak, Michael A.; Boppart, Stephen A.

    2016-02-01

    Otolaryngologists utilize a variety of diagnostic techniques to assess middle ear health. Tympanometry, audiometry, and otoacoustic emissions examine the mobility of the tympanic membrane (eardrum) and ossicles using ear canal pressure and auditory tone delivery and detection. Laser Doppler vibrometry provides non-contact vibrational measurement, and acoustic reflectometry is used to assess middle ear effusion using sonar. These technologies and techniques have advanced the field beyond the use of the standard otoscope, a simple tissue magnifier, yet the need for direct visualization of middle ear disease for superior detection, assessment, and management remains. In this study, we evaluated the use of portable optical coherence tomography (OCT) and pneumatic low-coherence interferometry (LCI) systems with handheld probe delivery to standard tympanometry, audiometry, otoacoustic emissions, laser Doppler vibrometry, and acoustic reflectometry. Comparison of these advanced optical imaging techniques and current diagnostics was conducted with a case study subject with a history of unilateral eardrum trauma. OCT and pneumatic LCI provide novel dynamic spatiotemporal structural data of the middle ear, such as the thickness of the eardrum and quantitative detection of underlying disease pathology, which could allow for more accurate diagnosis and more appropriate management than currently possible.

  5. COMPARISON BETWEEN COMPUTED TOMOGRAPHIC CHARACTERISTICS OF THE MIDDLE EAR IN NONBRACHYCEPHALIC AND BRACHYCEPHALIC DOGS WITH OBSTRUCTIVE AIRWAY SYNDROME.

    Science.gov (United States)

    Salgüero, Raquel; Herrtage, Michael; Holmes, Mark; Mannion, Paddy; Ladlow, Jane

    2016-03-01

    Prevalence of subclinical middle ear lesions in dogs that undergo computed tomography (CT) and magnetic resonance imaging of the head has been reported up to 41%. A predisposition in brachycephalics has been suggested, however evidence-based studies are lacking. Aims of this retrospective cross-sectional study were to compare CT characteristics of the middle ear in groups of nonbrachycephalic and brachycephalic dogs that underwent CT of the head for conditions unrelated to ear disease, and test associations between thickness of the soft palate and presence of subclinical middle ear lesions. One observer recorded CT findings for each dog without knowledge of group status. A total of 65 dogs met inclusion criteria (25 brachycephalic, 40 nonbrachycephalic). Brachycephalic dogs had a significantly thicker bulla wall (P = 2.38 × 10(-26) ) and smaller luminal volume (P = 5.74 × 10(-20) ), when compared to nonbrachycephalic dogs. Soft palate thickness was significantly greater in the brachycephalic group (P = 2.76 × 10(-9) ). Nine of 25 brachycephalic dogs had material in the lumen of the tympanic cavity, compared to zero of 45 of nonbrachycephalics. Within the brachycephalic group, a significant difference in mean soft palate thickness was identified for dogs with material in the middle ear (12.2 mm) vs. air-filled bullae (9 mm; P = 0.016). Findings from the current study supported previous theories that brachycephalic dogs have a greater prevalence of subclinical middle ear effusion and smaller bulla luminal size than nonbrachycephalic dogs. Authors recommend that the bulla lumen volume formula previously developed for mesaticephalic dogs, (-0.612 + 0.757 [lnBW]) be adjusted to 1/3(-0.612 + 0.757 [lnBW]) for brachycephalic breeds. PMID:26765680

  6. Transducer Type and Design Influence on the Hearing Loss Compensation Behaviour of the Electromagnetic Middle Ear Implant in a Finite Element Analysis

    OpenAIRE

    Liu, Houguang; Ge, Shirong; Cheng, Gang; Yang, Jianhua; Rao, Zhushi; Huang, Xinsheng

    2014-01-01

    Several types of electromagnetic transducer for the middle ear implants (MEIs) have been developed as an alternative to conventional hearing aids for the rehabilitation of sensorineural hearing loss. Electromagnetic transducer type and design are thought to have a significant influence on their hearing compensation performance. To investigate these effects, a middle ear computational model was constructed based on a complete set of microcomputerized tomography section images of a human ear. I...

  7. Inadvertent insertion of hearing aid impression material into the middle ear: Case report and implications for future community hearing services ☆

    OpenAIRE

    Algudkar, Ashwin; Maden, Belma; Singh, Arvind; Tatla, Taran

    2013-01-01

    INTRODUCTION The creation of ear moulds for hearing aids is generally considered a safe and routine procedure for trained professionals. In the literature there are reports of otological complications caused by hearing aid mould impression material in the middle ear cavity but such complications are considered rare. PRESENTATION OF CASE We present the case of a patient in whom impression material entered the middle ear through a perforation of the tympanic membrane during the process of makin...

  8. [Embryonal rhabdomyosarcoma of the middle ear: description of a case with long-term survival].

    Science.gov (United States)

    Artesi, L; Sbrocca, M

    1990-01-01

    A case is described of embryonal rhabdomyosarcoma (E.R.) of the middle ear in a 4-year-old child; survival has been over 9 years. R.E. is the most common malignant tumor of the auricular region in children and is most often fatal due to locoregional extensions or secondary metastases carried through the bloodstream and lymphatic systems. The basis for treatment is a multidisciplinary approach to the disease: surgery with as broad an exeresis as possible; radiotherapy with tumor-killing doses of 5,500/6,000 rads; and polychemotherapy (Vincristina, Endoxan, Methotrexate). Such "aggressive" treatment often results in a high rate of morbidity with complications involving the blood, bones, eyes and meninx often requiring temporary suspension of treatment and prolonged hospitalization. PMID:2260443

  9. Advances tomographic in evaluation of middle ear; Avancos tomograficos na avaliacao da orelha media

    Energy Technology Data Exchange (ETDEWEB)

    Anjos, Mayara Alves Pinheiro dos; Ledo, Mirelle D& #x27; arc Frota; Ribeiro, Marcio Duarte, E-mail: may_anjos@yahoo.com.br [Fundacao Bahiana para o Desenvolvimento das Ciencias, Escola Bahiana de Medicina e Saude Publica, Salvador, BA (Brazil)

    2011-07-01

    Computed tomography has a key role in the study of hearing, since through it can be evaluated structures not seen by otoscope. In many clinical situations the diagnosis through this test proves limited, being fundamental examination of the associated image reconstructions: multiplanar reconstruction, maximum intensity projection, and volume-rendering technique. The ossicular chain is a complex formed by the ossicles malleus, incus and stapes, situated in the middle ear; it is difficult to view them in orthogonals planes. This review article intends to demonstrate the importance of post-processing the image of the ossicular chain for a better representation of the anatomy and possible diseases. Reformatting of images helps, significantly, to a better visualization of these structures as related congenital malformations, vascular abnormalities, inflammatory conditions, neoplasia and traumas. (author)

  10. Evaluation of human middle ear function via an acoustic power assessment.

    Science.gov (United States)

    Allen, Jont B; Jeng, Patricia S; Levitt, Harry

    2005-01-01

    Measurements of middle ear (ME) acoustic power flow (power reflectance, power absorption, and transmittance) and normalized impedance (acoustic resistance, acoustic reactance, and impedance magnitude) were compared for their utility in clinical applications. Transmittance, a measure of the acoustic power absorbed by the ME, was found to have several important advantages over other measures of acoustic power flow. In addition to its simple and audiologically relevant physical interpretation (absorbed power), the normal transmittance curve has a simple shape that is visually similar to the ME transfer function. The acoustic impedance measures (resistance and reactance) provided important additional information about ME status and supplemented transmittance measurements. Together these measurements can help identify unusual conditions such as eardrum perforations. While this article is largely a review of the development of a commercial power reflectance measurement system, previously unpublished experimental results are presented. PMID:16470465

  11. Comparative anatomy of the middle ear ossicles of extant hominids--Introducing a geometric morphometric protocol.

    Science.gov (United States)

    Stoessel, Alexander; Gunz, Philipp; David, Romain; Spoor, Fred

    2016-02-01

    The presence of three interconnected auditory ossicles in the middle ear is a defining characteristic of mammals, and aspects of ossicle morphology are related to hearing sensitivity. However, analysis and comparison of ossicles are complicated by their minute size and complex three-dimensional shapes. Here we introduce a geometric morphometric measurement protocol for 3D shape analysis based on landmarks and semilandmarks obtained from μCT images and apply it to ossicles of extant hominids (great apes and humans). We show that the protocol is reliable and reproducible over a range of voxel resolutions, and captures even subtle shape differences. Using this approach it is possible to distinguish the hominid taxa by mean shapes of their malleus and incus (p morphometric studies analyzing ossicles of extinct hominids, with a bearing on taxonomy, phylogeny and auditory function. PMID:26852810

  12. Topical administration of hyaluronic acid in children with recurrent or chronic middle ear inflammations.

    Science.gov (United States)

    Torretta, Sara; Marchisio, Paola; Rinaldi, Vittorio; Gaffuri, Michele; Pascariello, Carla; Drago, Lorenzo; Baggi, Elena; Pignataro, Lorenzo

    2016-09-01

    Hyaluronic acid (HA) treatment has been successfully performed in patients with recurrent upper airway infections or rhinitis. The aim of this study was to assess the efficacy and safety of the topical nasal administration of an HA-based compound by investigating its effects in children with recurrent or chronic middle ear inflammations and chronic adenoiditis. A prospective, single-blind, 1:1 randomised controlled study was performed to compare otoscopy, tympanometry and pure-tone audiometry in children which received the daily topical administration of normal 0.9% sodium chloride saline solution (control group) or 9 mg of sodium hyaluronate in 3 mL of a 0.9% sodium saline solution. The final analysis was based on 116 children (49.1% boys; mean age, 62.9 ± 17.9 months): 58 in the control group and 58 in the study group. At the end of follow-up, the prevalence of patients with impaired otoscopy was significantly lower in the study group (P value = 0.024) compared to baseline but not in the control group. In comparison with baseline, the prevalence of patients with impaired tympanometry at the end of the follow-up period was significantly lower in the study group (P value = 0.047) but not in the control group. The reduction in the prevalence of patients with conductive hearing loss (CHL) (P value = 0.008) and those with moderate CHL (P value = 0.048) was significant in the study group, but not in the control group. The mean auditory threshold had also significantly improved by the end of treatment in the study group (P value = 0.004) but not in the control group. Our findings confirm the safety of intermittent treatment with a topical nasal sodium hyaluronate solution and are the first to document its beneficial effect on clinical and audiological outcomes in children with recurrent or chronic middle ear inflammations associated with chronic adenoiditis. PMID:27481884

  13. Predominant Bacteria Detected from the Middle Ear Fluid of Children Experiencing Otitis Media: A Systematic Review.

    Directory of Open Access Journals (Sweden)

    Chinh C Ngo

    Full Text Available Otitis media (OM is amongst the most common childhood diseases and is associated with multiple microbial pathogens within the middle ear. Global and temporal monitoring of predominant bacterial pathogens is important to inform new treatment strategies, vaccine development and to monitor the impact of vaccine implementation to improve progress toward global OM prevention.A systematic review of published reports of microbiology of acute otitis media (AOM and otitis media with effusion (OME from January, 1970 to August 2014, was performed using PubMed databases.This review confirmed that Streptococcus pneumoniae and Haemophilus influenzae, remain the predominant bacterial pathogens, with S. pneumoniae the predominant bacterium in the majority reports from AOM patients. In contrast, H. influenzae was the predominant bacterium for patients experiencing chronic OME, recurrent AOM and AOM with treatment failure. This result was consistent, even where improved detection sensitivity from the use of polymerase chain reaction (PCR rather than bacterial culture was conducted. On average, PCR analyses increased the frequency of detection of S. pneumoniae and H. influenzae 3.2 fold compared to culture, whilst Moraxella catarrhalis was 4.5 times more frequently identified by PCR. Molecular methods can also improve monitoring of regional changes in the serotypes and identification frequency of S. pneumoniae and H. influenzae over time or after vaccine implementation, such as after introduction of the 7-valent pneumococcal conjugate vaccine.Globally, S. pneumoniae and H. influenzae remain the predominant otopathogens associated with OM as identified through bacterial culture; however, molecular methods continue to improve the frequency and accuracy of detection of individual serotypes. Ongoing monitoring with appropriate detection methods for OM pathogens can support development of improved vaccines to provide protection from the complex combination of

  14. Evaluation of the middle and inner ear structures: comparison of hybrid rendering, virtual endoscopy and axial 2D source images

    International Nuclear Information System (INIS)

    Recent developments in 3D reconstructions can enhance the quality and diagnostic value of axial 2D image data sets with direct benefits for clinical practice. To show the possible advantages of a hybrid rendering method [color-coded 3D shaded-surface display (SSD)- and volume rendering method] with the possibility of virtual endoscopy we have specifically highlighted the use in relation to the middle and inner ear structures. We examined 12 patients with both normal findings and postoperative changes, using image data sets from high-resolution spiral computed tomography (HRSCT). The middle and inner ear was segmented using an interactive threshold interval density volume-growing method and visualized with a color-coded SSD rendering method. The temporal bone was visualized using a transparent volume rendering method. The 3D- and virtual reconstructions were compared with the axial 2D source images. The evaluated middle and inner ear structures could be seen in their complete form and correct topographical relationship, and the 3D- and virtual reconstructions indicated an improved representation and spatial orientation of these structures. A hybrid and virtual endoscopic method could add information and improve the value of imaging in the diagnosis and management of patients with middle or inner ear diseases making the understanding and interpretation of axial 2D CT image data sets easier. The introduction of an improved rendering algorithm aids radiological diagnostics, medical education, surgical planning, surgical training, and postoperative assessment. (orig.)

  15. Ear tube insertion

    Science.gov (United States)

    Myringotomy; Tympanostomy; Ear tube surgery; Pressure equalization tubes; Ventilating tubes; Ear infection - tubes; Otitis - tubes ... trapped fluid can flow out of the middle ear. This prevents hearing loss and reduces the risk ...

  16. Increasing rate of middle ear ventilation tube insertion in children in denmark

    DEFF Research Database (Denmark)

    Djurhuus, Bjarki Ditlev; Skytthe, Axel; Christensen, Kaare;

    2014-01-01

    ventilation tube insertions distributed among 269,459 different children were identified. From 1997 to 2010 the age standardized incidence rate in 0-15-year-olds increased from 26 to 40 per 1000 person years with an estimated annual increase of 2.0% (95% confidence interval 1.9-2.1%). The largest increase in......OBJECTIVE: To study the incidence rates of middle ear ventilation tube insertion in children aged 0 to 15 years in Denmark from 1997 to 2010. METHODS: Using two national registers, the Danish National Health Service Register and the Danish National Patient Register, practically all cases of middle...... incidence rate was found in 1-year-olds with an annual increase of 4.5% (95% confidence interval 4.4-4.6%). Age-specific incidence rates remained at maximum around the age of 14 months throughout the period. The cumulative incidence proportion for the 2010 birth cohort by the time they reach the age of 5...

  17. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Hearing, Ear Infections, and Deafness Travel Inside the Ear Video When sound waves reach your ear, you know you've heard a soft sound ... loud sound. The sound passes through the outer ear and is funneled into the middle ear, where ...

  18. [Middle ear salivary gland choristoma related to branchio-oto-renal syndrome diagnosed by array-CGH].

    Science.gov (United States)

    Amrhein, P; Sittel, C; Spaich, C; Kohlhase, J; Boppert, R; Kohlhof, P; Koitschev, A

    2014-05-01

    Branchio-oto-renal (BOR) syndrome is characterized by ear malformations associated with sensorineural or mixed hearing loss. In addition, preauricular tags, preauricular pits, branchial cleft fistulas and cysts, as well as renal dysplasia are seen. A genetic mutation on chromosome 8, either autosomal dominantly inherited or occuring as a spontaneous mutation, is the cause in the majority of cases. Using array-based comparative genomic hybridization (CGH), it is possible to detect even the smallest genetic changes. Salivary gland choristoma in the middle ear is very rare. Surgical removal and histological clarification are required. PMID:23868653

  19. High-resolution numerical model of the middle and inner ear for a detailed analysis of radio frequency absorption

    International Nuclear Information System (INIS)

    In order to enable a detailed analysis of radio frequency (RF) absorption in the human middle and inner ear organs, a numerical model of these organs was developed at a spatial resolution of 0.1 mm, based on a real human tissue sample. The dielectric properties of the liquids (perilymph and endolymph) inside the bony labyrinth were measured on samples of ten freshly deceased humans. After inserting this model into a commercially available numerical head model, FDTD-based computations for exposure scenarios with generic models of handheld devices operated close to the head in the frequency range 400-3700 MHz were carried out. For typical output power values of real handheld mobile communication devices the obtained results showed only very small amounts of absorbed RF power in the middle and inner ear organs. Highest absorption in the middle and inner ear was found for the 400 MHz irradiation. In this case, the RF power absorbed inside the labyrinth and the vestibulocochlear nerve was as low as 166 μW and 12 μW, respectively, when considering a device of 500 mW output power operated close to the ear. For typical mobile phone frequencies (900 MHz and 1850 MHz) and output power values (250 mW and 125 mW) the corresponding values of absorbed RF power were found to be more than one order of magnitude lower than the values given above. These results indicate that temperature-related biologically relevant effects on the middle and inner ear, induced by the RF emissions of typical handheld mobile communication devices, are unlikely

  20. Cats

    Science.gov (United States)

    ... those experienced by humans. Cats that hunt wild rodents and rabbits in the western, particularly the southwestern, ... caused by a fungus that can infect skin, hair, and nails of both people and animals. Ringworm ...

  1. A method for three-dimensional displacement and deformation measurement applied to the statically loaded middle ear ossicles

    Science.gov (United States)

    Decraemer, Willem F.; Gea, Stefan L.; Maas, Steve A.; Dirckx, Joris J. J.

    2008-06-01

    The middle ear ossicles transmit sound from eardrum to inner ear under largely varying ambient pressure conditions. To protect the structures within the cochlea from excessive footplate incursions the configuration of the ossicles changes with pressure. Sequences of micro CT-scans were acquired from gerbil temporal bones under static ear canal pressures ranging from -450 to +450 daPa. These image stacks were used to track the 3D motion and deformations of the ossicles as a function of pressure using hyperelastic warping. Using the scans for zero pressure, accurate finite-element reference models were generated for each of the ossicles. With the difference between these template images and the target image data recorded in a deformed configuration as a driving force, the warping algorithm displaced and deformed the finite-element models of the ossicles in order to align the deformed template with the target data. Position changes of the ossicles within the middle ear cavity and deformation of the ossicles and the tympanic membrane were all measured in a same preparation. For each static pressure load a finite-element ossicular chain model is obtained in the run and can be used for further analysis under acoustic stimulation.

  2. Discovery of a Biological Mechanism of Active Transport through the Tympanic Membrane to the Middle Ear.

    Science.gov (United States)

    Kurabi, Arwa; Pak, Kwang K; Bernhardt, Marlen; Baird, Andrew; Ryan, Allen F

    2016-01-01

    Otitis media (OM) is a common pediatric disease for which systemic antibiotics are often prescribed. While local treatment would avoid the systemic treatment side-effects, the tympanic membrane (TM) represents an impenetrable barrier unless surgically breached. We hypothesized that the TM might harbor innate biological mechanisms that could mediate trans-TM transport. We used two M13-bacteriophage display biopanning strategies to search for mediators of trans-TM transport. First, aliquots of linear phage library displaying 10(10th) 12mer peptides were applied on the TM of rats with active bacterial OM. The middle ear (ME) contents were then harvested, amplified and the preparation re-applied for additional rounds. Second, the same naïve library was sequentially screened for phage exhibiting TM binding, internalization and then transit. Results revealed a novel set of peptides that transit across the TM to the ME in a time and temperature dependent manner. The peptides with highest transport capacities shared sequence similarities. Historically, the TM was viewed as an impermeable barrier. However, our studies reveal that it is possible to translocate peptide-linked small particles across the TM. This is the first comprehensive biopanning for the isolation of TM transiting peptidic ligands. The identified mechanism offers a new drug delivery platform into the ME. PMID:26946957

  3. A study of sound transmission in an abstract middle ear using physical and finite element models.

    Science.gov (United States)

    Gonzalez-Herrera, Antonio; Olson, Elizabeth S

    2015-11-01

    The classical picture of middle ear (ME) transmission has the tympanic membrane (TM) as a piston and the ME cavity as a vacuum. In reality, the TM moves in a complex multiphasic pattern and substantial pressure is radiated into the ME cavity by the motion of the TM. This study explores ME transmission with a simple model, using a tube terminated with a plastic membrane. Membrane motion was measured with a laser interferometer and pressure on both sides of the membrane with micro-sensors that could be positioned close to the membrane without disturbance. A finite element model of the system explored the experimental results. Both experimental and theoretical results show resonances that are in some cases primarily acoustical or mechanical and sometimes produced by coupled acousto-mechanics. The largest membrane motions were a result of the membrane's mechanical resonances. At these resonant frequencies, sound transmission through the system was larger with the membrane in place than it was when the membrane was absent. PMID:26627771

  4. Femtosecond laser microstructuring of titanium surfaces for middle ear ossicular replacement prosthesis

    Science.gov (United States)

    Ilgner, Justus; Biedron, Slavomir; Fadeeva, Elena; Chichkov, Boris; Westhofen, Martin

    2009-02-01

    Introduction: While a variety of materials has been evaluated for replacement of human middle ear ossicles following inflammation, titanium and its alloys have shown excellent sound transmission properties and biocompatibility. However, cartilage thickness at the tympanic membrane interface deteriorates over time, while fibrous tissue formation may dislodge the titanium prosthesis. This study was performed to evaluate the effect of microstructures on titanium surfaces in contact with adjacent biological tissue. Materials and Methods: Titanium samples of 5mm diameter and 0,25mm thickness were structured by means of a Ti:Sapphire femtosecond laser operating at 970nm. The structures applied were lines of parabolic shape (cross-sectional) of 5µm (parallel), 5µm (cross-hatch) and 10µm width (parallel). The inter-groove distance between two maxima was exactly twice the line width. Results: Lines smaller than 5µm were not feasible due to the natural irregularity of the basic material with pits and level changes of up to 2µm. The process showed little debris and constant microstructure shape over the whole structured area (2x2mm). The resulting debris was examined for toxic by-products on human fibrobcytes and chondrocytes. Discussion: The results show that microstructures can be applied on titanium surfaces for human implantation with reproducible and constant shapes. Further studies will focus on cell culture which has suggested a relative selectivity for chondrocyte compared to fibrocyte growth in earlier studies with selected microstructures.

  5. Bilateral use of active middle ear implants: speech discrimination results in noise.

    Science.gov (United States)

    Wolf-Magele, Astrid; Koci, Viktor; Schnabl, Johannes; Zorowka, Patrick; Riechelmann, Herbert; Sprinzl, Georg Mathias

    2016-08-01

    Binaural sound reception has advantages over unilateral perception, including better localization and sound quality as well as speech and tone reception in both quiet and noisy environments. Up to now, most active middle ear implant (AMEI) users have been unilaterally implanted, but patient demand for an implant on the other side is increasing. Ten bilaterally-AMEI implanted native German-speaking adults were included in the study. The Oldenburg sentence test was used to measure speech reception thresholds in noise. The subject's signal-to-noise ratio (SNR) at a speech reception score of 50 % was calculated for different noise conditions. SRT was measured as a function of noise condition (nc) and listening condition (lc)-for example, SRT (lc, nc), with nc from S0N0, S0N-90, or S0N90 and lc from left, right or both. For each noise condition, the squelch effect and the binaural summation effect were calculated. Patients in this study demonstrated improvement with bilateral AMEIs compared to right or left AMEI only in all three tested listening conditions. Statistical significance was found in the S0N0 condition to favor usage of bilateral AMI versus either the right or left side only. The benefits of binaural hearing are well known, also in normal-hearing individuals. In the future every bilateral implantation should be a part of the clinical routine. Bilateral implantation can help to reduce problems in background noise and restore directional hearing. PMID:26385811

  6. Dental root agenesis secondary to irradiation therapy in a case of rhabdomyosarcoma of the middle ear

    International Nuclear Information System (INIS)

    There have been only a few published reports on the dental-facial effects of radiation therapy and the subsequent oral management of these patients. A case involving a 13-year-old black male patient with a history of rhabdomyosarcoma is presented. The patient received 4,050 rads of radiation to the right middle ear when he was 2 years of age. His residual medical and dental difficulties are apparently complications from the initial therapy. Examination of the oral cavity revealed bimaxillary micrognathia and marked loss of vertical dimension. A Class II facial profile with Class I molar relationship was observed. The mandible was thin and hypoplastic, with a small knife-edge alveolar ridge. The remaining eighteen erupted permanent teeth were very mobile, and root development had ceased after only initial formation. All of the teeth except the first permanent molars were extracted, and immediate partial dentures were inserted at the time of surgery. A discussion of therapeutic considerations follows the case report

  7. Hearing loss and potential hazards of metallic middle-ear implants in NMR-magnetic fields

    International Nuclear Information System (INIS)

    Concurrent with the expanding clinical applications of nuclear magnetic resonance (NMR) imaging, patients with metallic middle-ear implants will certainly be exposed to this strong magnetic field in the future. To determine potential hazards, associated with movements of steel- or Platinium stapes-prostheses, several tests were performed in a 0.5 tesla NMR unit and the induced forces were calculated. Although the commonly used paramagnetic steel-wire or platinium-alloys will not dislodge in vivo, ferromagnetic prostheses may present a hazardous risk. Prior to exposure to the magnetic field, information about the implanted material should therefore be obtained. A side-effect of the induced current flow is the attenuation of the sound-vibrations of the stapes prosthesis. This, 5-10 dB impairment of transmission develops only at a certain position of the patient's head, when the prosthesis vibrates perpendicularly to the magnetic field's Z-axis. Patients with a metallic prosthesis should be informed about this purely physical, harmless phenomenon prior to entering the NMR-cylinder. (orig.)

  8. Morphological effects of nanosecond- and femtosecond-pulsed laser ablation on human middle ear ossicles

    Science.gov (United States)

    Ilgner, Justus F. R.; Wehner, Martin M.; Lorenzen, Johann; Bovi, Manfred; Westhofen, Martin

    2006-01-01

    We evaluate the feasibility of nanosecond-pulsed and femtosecond-pulsed lasers for otologic surgery. The outcome parameters are cutting precision (in micrometers), ablation rate (in micrometers per second), scanning speed (in millimeters per second), and morphological effects on human middle ear ossicles. We examine single-spot ablations by a nanosecond-pulsed, frequency-tripled Nd:YAG laser (355 nm, beam diameter 10µm, pulse rate 2 kHz, power 250 mW) on isolated human mallei. A similar system (355 nm, beam diameter 20µm, pulse rate 10 kHz, power 160-1500 mW) and a femtosecond-pulsed CrLi:SAF-Laser (850 nm, pulse duration 100 fs, pulse energy 40 µJ, beam diameter 36 µm, pulse rate 1 kHz) are coupled to a scanner to perform bone surface ablation over a defined area. In our setups 1 and 2, marginal carbonization is visible in all single-spot ablations of 1-s exposures and longer: With an exposure time of 0.5 s, precise cutting margins without carbonization are observed. Cooling with saline solution result is in no carbonization at 1500 mW and a scan speed of 500 mm/s. Our third setup shows no carbonization but greater cutting precision, although the ablation volume is lower. Nanosecond- and femtosecond-pulsed laser systems bear the potential to increase cutting precision in otologic surgery.

  9. Middle ear mechanics of type IV and type V tympanoplasty: II. Clinical analysis and surgical implications.

    Science.gov (United States)

    Merchant, S N; Rosowski, J J; Ravicz, M E

    1995-09-01

    Type IV and type V tympanoplasty operations are simple, robust, and well-established techniques to reconstruct middle ears that have been severely altered by chronic otitis media. In a previous paper, the authors developed a simple four-block physiologic model to describe hearing results after these procedures. This paper presents a comparison of model predictions to hearing results obtained from a detailed retrospective clinical review of 30 type IV and type V procedures. Audiograms predicted by the model and those observed clinically show good agreement over a wide frequency range (500-4000 Hz) and for many different clinical conditions. Thus, this model reliably predicts postsurgical hearing results. The application of quantitative analyses provided by this model permits the formation of a few simple surgical rules that may improve postoperative hearing results. (1) The footplate should be left as mobile as possible (e.g., by covering it with a very thin split-thickness skin graft, as opposed to a fascia graft, which will tend to stiffen it). If the footplate is ankylosed, it should be removed and replaced with a compliant tissue graft, such as fat. (2) The round window acoustic graft shield should be made as stiff as possible. If the shield material used is temporalis fascia, then one should consider using more than one layer, or reinforcing it with cartilage. (3) An attempt should be made to create an aerated cavum minor containing at least 0.03 cc of air. PMID:8588661

  10. Original Solution for Middle Ear Implant and Anesthetic/Surgical Management in a Child with Severe Craniofacial Dysmorphism

    Directory of Open Access Journals (Sweden)

    Giovanni Bianchin

    2015-01-01

    Full Text Available We describe the novel solution adopted in positioning middle ear implant in a child with bilateral congenital aural atresia and craniofacial dysmorphism that have posed a significant challenge for the safe and correct management of deafness. A five-year-old child, affected by a rare congenital disease (Van Maldergem Syndrome, suffered from conductive hearing loss. Conventional skin-drive bone-conduction device, attached with a steel spring headband, has been applied but auditory restoration was not optimal. The decision made was to position Vibrant Soundbridge, a middle ear implant, with an original surgical application due to hypoplasia of the tympanic cavity. Intubation procedure was complicated due to child craniofacial deformities. Postoperative hearing rehabilitation involved a multidisciplinary team, showing improved social skills and language development.

  11. Original Solution for Middle Ear Implant and Anesthetic/Surgical Management in a Child with Severe Craniofacial Dysmorphism.

    Science.gov (United States)

    Bianchin, Giovanni; Tribi, Lorenzo; Reverzani, Aronne; Formigoni, Patrizia; Polizzi, Valeria

    2015-01-01

    We describe the novel solution adopted in positioning middle ear implant in a child with bilateral congenital aural atresia and craniofacial dysmorphism that have posed a significant challenge for the safe and correct management of deafness. A five-year-old child, affected by a rare congenital disease (Van Maldergem Syndrome), suffered from conductive hearing loss. Conventional skin-drive bone-conduction device, attached with a steel spring headband, has been applied but auditory restoration was not optimal. The decision made was to position Vibrant Soundbridge, a middle ear implant, with an original surgical application due to hypoplasia of the tympanic cavity. Intubation procedure was complicated due to child craniofacial deformities. Postoperative hearing rehabilitation involved a multidisciplinary team, showing improved social skills and language development. PMID:26491591

  12. Prognostic value of bone involvement in patients with squamous cell carcinoma of the external and middle ear

    International Nuclear Information System (INIS)

    The incidence of the external and middle ear squamous cell carcinoma (SCC) is extremely rare in the head and neck cancer with less than 1%. Therefore, the correlation between the staging classification and the prognosis has not been clear. Prognostic factors for patients with the external and middle ear SCC were assessed in the initial clinical symptoms and radiographic imaging. 13 patients with the external and middle ear SCC (5 male and 8 female) that had been treated at the Department of Otorhinolaryngology, Kanazawa University hospital from 2000 to 2006 were selected for this study. The radiation therapy followed surgery in ten patients. One patient received the radical cure irradiation before surgery. Two patients received a surgical excision alone. The temporal bone involvement and the parotid gland involvement in the radiographic image (computed tomography imaging and/or magnetic resonance imaging) were assessed. Clinical symptoms (otalgia, hearing disturbance, tinnitus, vertigo and facial nerve palsy) before treatment were reviewed based on the medical record. The correlation of those clinical factors and T staging in the Pittsburgh classification with overall survival was statistically assessed. The temporal bone involvement significantly correlated with worse prognosis. However, parotid gland involvement did not influence the prognosis. Moreover, statistically significant difference in T staging of the Pittsburgh classification (T1·T2 vs. T3·T4) was not found. The temporal bone involvement in the radiographic image was a prognostic factor for patients with the external and middle ear SCC. Pittsburgh classification needs to be modified because the bony part of the external auditory canal involvement is considered as T2 stage and the soft tissue involvement is defined as T4 stage. (author)

  13. Dexmedetomidine infusion during middle ear surgery under general anaesthesia to provide oligaemic surgical field: A prospective study

    Directory of Open Access Journals (Sweden)

    Kumkum Gupta

    2015-01-01

    Full Text Available Background and Aims: Middle ear surgery requires bloodless surgical field for better operating conditions, deep level of anaesthesia and rapid emergence. Recent studies suggest that α2 agonists could provide desired surgical field, sedation and analgesia. The present study was aimed to evaluate the clinical effects of dexmedetomidine infusion as anaesthetic adjuvant during middle ear surgery using operating microscope. Methods: Sixty four adult patients aged 18-58 years, American Society of Anaesthesiologists Grades I and II, of both gender were randomised into two comparable equal groups of 32 patients each for middle ear surgery under general anaesthesia with standard anaesthetic technique. After induction of general anaesthesia, patients of Group I were given dexmedetomidine infusion of 0.5 μg/kg/h and patients of Group II were given placebo infusion of normal saline. Isoflurane concentration was titrated to achieve a systolic blood pressure 30% below the baseline value. All patients were assessed intra-operatively for bleeding at surgical field, haemodynamic changes, awakening time and post-operative recovery. Results: Statistically significant reduction was observed in the required percentage of isoflurane (0.8 ± 0.6% to maintain the systolic blood pressure 30% below the baseline values in patients receiving dexmedetomidine infusion when compared to those receiving placebo infusion (1.6 ± 0.7%. Patients receiving dexmedetomidine infusion had statistically significant lesser bleeding at surgical field (P < 0.05. The mean awakening time and recovery from anaesthesia did not show any significant difference between the groups. Conclusion: Dexmedetomidine infusion can be safely used to provide oligaemic surgical field for better visualization using operating microscope for middle ear surgery.

  14. Evaluation of the subjective effect of middle ear implantation in hearing-impaired patients with severe external otitis.

    OpenAIRE

    Snik, A.F.M.; van Duijnhoven, N. T. L.; Mulder, J.J.S.; Cremers, C.W.R.J.

    2007-01-01

    The subjective benefit of middle ear implantation was studied in a group of 23 hearing-impaired patients who could not use conventional hearing aids owing to severe chronic external otitis. Changes in hearing disability (Abbreviated Profile of Hearing Aid Benefit [APHAB]) and changes in quality of life (Glasgow Benefit Inventory [GBI]) were determined. Mean benefit value on the APHAB for the subscale Ease of Communication was close to the mean reference value for conventional hearing aids. Fo...

  15. Original Solution for Middle Ear Implant and Anesthetic/Surgical Management in a Child with Severe Craniofacial Dysmorphism

    OpenAIRE

    Giovanni Bianchin; Lorenzo Tribi; Aronne Reverzani; Patrizia Formigoni; Valeria Polizzi

    2015-01-01

    We describe the novel solution adopted in positioning middle ear implant in a child with bilateral congenital aural atresia and craniofacial dysmorphism that have posed a significant challenge for the safe and correct management of deafness. A five-year-old child, affected by a rare congenital disease (Van Maldergem Syndrome), suffered from conductive hearing loss. Conventional skin-drive bone-conduction device, attached with a steel spring headband, has been applied but auditory restoration ...

  16. Mammalian development does not recapitulate suspected key transformations in the evolutionary detachment of the mammalian middle ear.

    Science.gov (United States)

    Ramírez-Chaves, Héctor E; Wroe, Stephen W; Selwood, Lynne; Hinds, Lyn A; Leigh, Chris; Koyabu, Daisuke; Kardjilov, Nikolay; Weisbecker, Vera

    2016-01-13

    The ectotympanic, malleus and incus of the developing mammalian middle ear (ME) are initially attached to the dentary via Meckel's cartilage, betraying their origins from the primary jaw joint of land vertebrates. This recapitulation has prompted mostly unquantified suggestions that several suspected--but similarly unquantified--key evolutionary transformations leading to the mammalian ME are recapitulated in development, through negative allometry and posterior/medial displacement of ME bones relative to the jaw joint. Here we show, using µCT reconstructions, that neither allometric nor topological change is quantifiable in the pre-detachment ME development of six marsupials and two monotremes. Also, differential ME positioning in the two monotreme species is not recapitulated. This challenges the developmental prerequisites of widely cited evolutionary scenarios of definitive mammalian middle ear (DMME) evolution, highlighting the requirement for further fossil evidence to test these hypotheses. Possible association between rear molar eruption, full ME ossification and ME detachment in marsupials suggests functional divergence between dentary and ME as a trigger for developmental, and possibly also evolutionary, ME detachment. The stable positioning of the dentary and ME supports suggestions that a 'partial mammalian middle ear' as found in many mammaliaforms--probably with a cartilaginous Meckel's cartilage--represents the only developmentally plausible evolutionary DMME precursor. PMID:26763693

  17. Ears and Altitude

    Science.gov (United States)

    ... the middle ear pressure cannot be equalized. The air already there is absorbed and a vacuum occurs, sucking the eardrum ... a pressure buildup but do not let the air out your mouth The ears have been ... of a physician who has experience in the care of ear disorders. The ear ...

  18. Radiation-Induced Middle Ear and Mastoid Opacification in Skull Base Tumors Treated With Radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Walker, Gary V. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Ahmed, Salmaan [Department of Radiology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Allen, Pamela [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Gidley, Paul W. [Department of Head and Neck Surgery, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Woo, Shiao Y. [Department of Radiation Oncology, University of Louisville, Louisville, KY (United States); DeMonte, Franco [Department of Neurosurgery, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Chang, Eric L. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Mahajan, Anita, E-mail: amahajan@mdanderson.org [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States)

    2011-12-01

    Purpose: To assess the incidence of middle ear (ME) pathology in patients treated with radiotherapy (RT) for skull base tumors. Methods and Materials: A retrospective analysis of 61 patients treated with RT between 2003 and 2008 for skull base tumors was conducted. Clinical outcomes and demographics were reviewed. Dose-volume histogram analysis was performed on the eustachian canal (EC), ME, mastoid air cells, vestibular apparatus, cochlea, internal auditory canal, lateral and posterior nasopharynx, and temporal lobes to relate doses to symptoms and radiographic change. Otomastoid opacification was rated 0 (none), 1 (mild), 2 (moderate), and 3 (severe) by a neuroradiologist blinded to clinical outcomes and doses. Results: The median prescribed dose was 50.4 Gy (range, 14-74 Gy). The ME mean dose was 14 Gy and 34 Gy for Grade 0-1 and 2-3 opacification, respectively (p < 0.0001). The mean mastoid dose was 10 Gy and 26 Gy for Grade 0-1 and 2-3, respectively (p < 0.0001). The mean EC dose was 17 Gy and 32 Gy for Grade 0-1 and 2-3, respectively (p = 0.0001). Otomastoid opacification resolved in 17 of 40 patients (42.5%), at a mean of 17 months after RT (range, 2-45 months). Otomastoid opacification persisted in 23 of 40 patients (57.5%), with a mean follow-up of 23 months (range, 2-55 months). Multivariate analysis showed that mastoid dose >30 Gy (odds ratio = 28.0, p < 0.001) and posterior nasopharynx dose of >30 Gy (odds ratio = 4.9, p = 0.009) were associated with Grade 2-3 effusions, whereas other factors including dose to EC and ME were not significant. Conclusions: A mean RT dose >30 Gy to the mastoid air cells or posterior nasopharynx is associated with increased risk of moderate to severe otomastoid opacification, which persisted in more than half of patients at 2-year follow-up.

  19. The midterm results of concurrent superselective arterial chemoradiotherapy for carcinoma of the external auditory canal and middle ear

    International Nuclear Information System (INIS)

    This study retrospectively reports the midterm results of concurrent superselective arterial chemoradiotherapy for carcinoma of the external auditory canal and middle ear. Fifteen patients (7 males and 8 females) who were treated for carcinoma of the external auditory canal and middle ear between March 2003 and July 2009 were enrolled in this study. The median follow-up period was 14 months (4-44 months). All patients were staged according to the Pittsburgh staging system by Moody as follows: T1 (n=1), T2 (n=1), T3 (n=1), T4 (n=12). Thirteen patients had squamous cell carcinoma, one had adenocarcinoma, and one had undifferentiated carcinoma. All catheterizations were performed via a transfemoral approach by the Seldinger method. After identifying the feeding arteries of the primary tumor, cisplatin (50 mg/body) was injected. Simultaneously a cisplatin antagonist, sodium thiosulfate, was administered intravenously. Four or five courses of arterial infusion were given weekly. The catheter was removed after each session. External beam irradiation was performed five times a week at 2 Gy per fraction. Total dose ranged from 40 to 60 Gy (median: 60 Gy). The toxicity was evaluated by Common Terminology Criteria for Adverse Events (CTC-AE) ver. 3.0. The 2-year overall survival (OS) rate was 73.4%, and progression free survival (PFS) rate was 53.3% for all patients. Concerning acute toxicity, one patient had Grade 3 dermatitis, and one had Grade 3 leucopenia. No catheter-related complications and no treatment-related deaths were observed. No severe late complications were observed, but one patient had a mild inflammation on the subcutaneous tissue. These results are comparable with those of other reports, suggesting that this method for carcinoma of the external auditory canal and middle ear is acceptable, but the OS rate and PFS rate need improvement. Further investigations are required with larger series to evaluate the long-term survival rate with this treatment. (author)

  20. Efficacy of nasopharyngeal culture in identification of pathogens in middle ear fluid in chronic otitis media with effusion

    Directory of Open Access Journals (Sweden)

    Eser O

    2009-01-01

    Full Text Available Purpose: Chronic otitis media with effusion (OME is the leading cause of hearing loss during childhood. In bacterial etiology of OME, the most frequent pathogens responsible are Haemophilus influenzae followed by Streptococcus pneumoniae and Moraxella catarrhalis . This study aimed at evaluating the accuracy of nasopharyngeal (NP specimens in the identification of pathogens in the middle ear fluid (MEF in patients with OME. Materials and Methods: In this cross sectional, case-control study, 95 MEFs and 53 NP secretion specimens were obtained from 53 children. As a control group, 102 NP specimens were taken from children having an operation other than an otological disease. Conventional culture methods and multiplex-PCR method have been used to determine the etiology of OME; NP carriage between cases and control groups were compared using conventional culture methods. Pearson Chi-Square and Fisher′s Exact tests were used in statistical analysis. Results : Bacteria were isolated by culture in 37.9% of MEF specimens, 14.7% of which belonged to the group H. influenzae , S. pneumoniae and M. catarrhalis. PCR was positive in 30.5% specimens targeting the same pathogens. There was a two-fold increase in carriage rate of S. pneumoniae and H. influenzae in patients than controls for each pathogen. Conclusion: PCR is a more reliable method to detect middle ear pathogens in MEF in comparison with the conventional culture methods. The NP colonization wasn′t found to be an indicator of the pathogen in MEF although middle ear pathogens colonize more in nasopharynx of diseased children.

  1. Role of Sialic Acid and Complex Carbohydrate Biosynthesis in Biofilm Formation by Nontypeable Haemophilus influenzae in the Chinchilla Middle Ear

    OpenAIRE

    Jurcisek, Joseph; Greiner, Laura; Watanabe, Hiroshi; Zaleski, Anthony; Apicella, Michael A.; Bakaletz, Lauren O.

    2005-01-01

    Nontypeable Haemophilus influenzae (NTHI) is an important pathogen in respiratory tract infections, including otitis media (OM). NTHI forms biofilms in vitro as well as in the chinchilla middle ear, suggesting that biofilm formation in vivo might play an important role in the pathogenesis and chronicity of OM. We've previously shown that SiaA, SiaB, and WecA are involved in biofilm production by NTHI in vitro. To investigate whether these gene products were also involved in biofilm production...

  2. Pneumatic otoscopy in the diagnosis of middle ear effusion: the use of video as a teaching aid.

    Science.gov (United States)

    Burke, P; Jones, W

    1989-01-01

    A recent survey has shown that the average general practitioner could expect to see 40 episodes of middle ear effusion in one year. It is an important condition because of its frequency, its insidious onset, and its persistence. It is presently associated with hearing loss, resulting in educational and social disadvantages. A more accurate diagnosis can be made over other conventional methods by the use of pneumatic otoscopy. It is a technique that is not widely used by general practitioners in this country. A videotape was produced to demonstrate the behaviour of the normal and abnormal eardrum during pneumatic otoscopy. This paper gives a review of how this was achieved. PMID:2809076

  3. Effects of dexamethasone on distributions of water and pertechnetate in brains of cats after middle cerebral artery occlusion

    International Nuclear Information System (INIS)

    Large parenteral doses of dexamethasone were given to five of ten cats after transorbital occlusion of one middle cerebral artery and to two of four cats after sham operations. Two days later the water content and brain/blood ratios of pertechnetate were measured in samples of cerebral tissue that were categorized as nonischemic, ischemic, or infarcted. Values for infarcted tissue were greater than those for ischemic tissue in untreated cats, but not in cats that received dexamethasone. The drug had no apparent effect in ischemic tissue that was not necrotic. These results help explain inconsistencies in previous studies and help define the potential usefulness of dexamethasone for treatment of cerebrovascular disease. (U.S.)

  4. Simulations and Measurements of Human Middle Ear Vibrations Using Multi-Body Systems and Laser-Doppler Vibrometry with the Floating Mass Transducer

    Directory of Open Access Journals (Sweden)

    Tobias Strenger

    2013-10-01

    Full Text Available The transfer characteristic of the human middle ear with an applied middle ear implant (floating mass transducer is examined computationally with a Multi-body System approach and compared with experimental results. For this purpose, the geometry of the middle ear was reconstructed from μ-computer tomography slice data and prepared for a Multi-body System simulation. The transfer function of the floating mass transducer, which is the ratio of the input voltage and the generated force, is derived based on a physical context. The numerical results obtained with the Multi-body System approach are compared with experimental results by Laser Doppler measurements of the stapes footplate velocities of five different specimens. Although slightly differing anatomical structures were used for the calculation and the measurement, a high correspondence with respect to the course of stapes footplate displacement along the frequency was found. Notably, a notch at frequencies just below 1 kHz occurred. Additionally, phase courses of stapes footplate displacements were determined computationally if possible and compared with experimental results. The examinations were undertaken to quantify stapes footplate displacements in the clinical practice of middle ear implants and, also, to develop fitting strategies on a physical basis for hearing impaired patients aided with middle ear implants.

  5. Ex vivo evaluation of ferromagnetism for metallic ocular and middle-ear prostheses exposed to a 1.5-T MR imager

    International Nuclear Information System (INIS)

    This paper determines ferromagnetism by measuring deflection angles for nine different metallic ocular and middle-ear biomedical implants exposed to a 1.5-T MR imager. Deflection angles were determined at the bore of a 1.5-t MR imager for two ocular (Fatio eyelid wire 0.008, Fatio eyelid wire 0.01) and seven middle-ear (House tantalum single loop, House tantalum double loop, IRP, Schuknecht tef-wire piston, Austin tytan piston, McGee piston, Robinson stapes prosthesis) biomedical implants. A previously described, standardized methodology was used to measure deflection angles. Deflection angles for the biomedical implants were 90 degrees for the first ocular implant, over 90 degrees for the second, and 0 degrees (no deflection measured) for the seven middle-ear implants

  6. Macroscopic description of the external and middle ear of paca (Cuniculus paca Linnaeus, 1766)

    OpenAIRE

    Leandro L. Martins; Ijanete Almeida-Silva; Maria Rossato; Adriana A.B. Murashima; Hyppolito, Miguel A.; Marcia R.F. Machado

    2015-01-01

    Abstract: Paca (Cuniculus paca), one of the largest rodents of the Brazilian fauna, has inherent characteristics of its species which can conribute as a new option for animal experimantation. As there is a growing demand for suitable experimental models in audiologic and otologic surgical research, the gross anatomy and ultrastructural ear of this rodent have been analyzed and described in detail. Fifteen adult pacas from the Wild Animals Sector herd of Faculdade de Ciências Agrárias e Veteri...

  7. Vibro-acoustic modelling of the outer and middle ear using the finite-element method.

    Science.gov (United States)

    Prendergast, P J; Ferris, P; Rice, H J; Blayney, A W

    1999-01-01

    In this study, a computer-based method called finite-element analysis is used to predict the forced-frequency response of the ear, with and without an ossicular replacement prosthesis (PORP 0362, Xomed Surgical Products). The method allows visualisation of the dynamical behaviour of the tympanic membrane (TM) and of the ossicles. The finite-element model is fully three-dimensional and includes both ligaments and muscles, and accounts for damping caused by the TM, ligaments, incudostapedial joint and the fluids of the inner ear. For validation, comparison is made with experimental measurements of umbo displacement taken from the literature. The translation and rotation (both anterior-posterior and inferior-superior) of the stapedial footplate are investigated. It is predicted that the translatory motion of the footplate decreases with increasing frequency, except when the frequency of the acoustic signal matches the natural frequencies of the ossicular chain or outer ear canal. The tilting motion of the stapedial footplate is also predicted to depend on frequency of excitation. The presence of a prosthesis changes the dynamical response considerably by shifting the natural frequencies of the ossicular chain. Ratios of stapes motion with and without the prostheses are plotted as a function of frequency allowing this effect to be clearly observed. PMID:10187928

  8. Cytokine profile of nasal and middle ear polyps in a patient with Woakes' syndrome and eosinophilic otitis media.

    Science.gov (United States)

    De Loof, Marie; De Leenheer, Els; Holtappels, Gabriële; Bachert, Claus

    2016-01-01

    Woakes' syndrome is characterised by severe recurrent nasal polyps in early childhood with broadening of the nose, nasal dyscrinia, frontal sinus aplasia and bronchiectasis. Eosinophilic otitis media (EOM) is an intractable condition that can cause gradual or sudden deterioration of hearing and is associated with comorbid asthma. For these reasons, both diseases must be recognised and treated appropriately. We present a case of a 20-year-old man with Woakes' syndrome complicated by EOM, with polyps in both middle ears; this condition has so far not been described as an entity of eosinophilic disease in the literature. We have, from reviewing the literature, learned that this is the first time that results of tissue examination on nasal polyposis with respect to tissue IgE, eosinophil-cationic protein, interleukin (IL)-17 and IL-5 in a patient with Woakes' syndrome and EOM, has been reported and discussed. PMID:27143164

  9. Middle ear meningiomas: a case series reviewing the clinical presentation, radiologic features, and contemporary management of a rare temporal bone pathology.

    Science.gov (United States)

    Stevens, Kristin L; Carlson, Matthew L; Pelosi, Stanley; Haynes, David S

    2014-01-01

    Meningiomas are the most common extra-axial intracranial neoplasm and frequently develop in the parasagittal region. Rarely, meningiomas may involve the middle ear and mastoid, resulting from contiguous spread of adjacent intracranial tumor, or less commonly as an isolated primary tumor of the middle ear. Patients with primary middle ear meningiomas (MEMs) often present with non-specific otologic complaints including hearing loss, otorrhea and otalgia thereby mimicking common chronic otitis media, while secondary lesions more frequently manifest sensorineural hearing loss, cranial neuropathy and other neurologic symptoms from the associated intracranial component. The radiological appearance of MEMs often overlaps with other tumors of the temporal bone. Therefore, a correct diagnosis cannot always be made prior to surgical biopsy. While gross total resection with preservation of existing neurological function is possible with smaller lesions, complete tumor removal may be extremely morbid with more extensive or adherent MEMs. In such cases, aggressive subtotal resection with close radiologic follow-up should be considered. Given the rarity of the studied condition, the literature addressing MEMs is sparse. The current study reviews ten additional cases of MEMs, highlighting the clinicopathologic and radiological features that distinguish meningiomas from other middle ear and mastoid pathology. PMID:24650749

  10. Comparison of the antiemetic effect of ramosetron with the combination of dexamethasone and ondansetron in middle ear surgery: A double-blind, randomized clinical study

    Directory of Open Access Journals (Sweden)

    Sameer Desai

    2013-01-01

    Full Text Available Background: Postoperative nausea and vomiting (PONV is a frequent complication of middle ear surgery. Ondansetron has been shown to be effective for early PONV and dexamethasone has been shown to be effective for late PONV. Therefore, a combination of dexamethasone and ondansetron is commonly used for middle ear surgery. This study was conducted to compare the combination of ondansetron and dexamethasone with ramosetron for early and late PONV up to 48 h after middle ear surgery. Methods: One hundred and twenty adults scheduled for middle ear surgery were allocated to receive either dexamethasone 8 mg and ondansetron 4 mg ( n=60 or ramosetron 0.3 mg ( n=60. General anesthesia with inhalation agents was used for all the patients. The incidence and severity of PONV, administration of rescue antiemetic, and the side effects of the antiemetic were documented during the first 48 h after surgery. Results: The incidence of nausea was significantly lower in the dexamethasone and ondansetron group compared to the ramosetron group between 2 and 24 h. The complete response, which is patients with no nausea or vomiting, was significantly more in dexamethasone and ondansetron group compared to ramosetron group between 2 and 24 h and between 24 and 48 h (76% vs. 56%, P=0.02, 93% vs. 81%, P=0.05, respectively. Overall, complete response was more in dexamethasone and ondansetron group compared to ramosetron group (71% vs. 40%, P=0.01. Conclusion: The combination of dexamethasone and ondansetron is superior to ramosetron for prevention of PONV after middle ear surgeries.

  11. Compatibility of the argon and KTP lasers with middle ear implants.

    Science.gov (United States)

    Wanamaker, H H; Silverstein, H

    1993-06-01

    Visible-spectrum lasers (argon, KTP) are becoming common tools in otology. Concern over transmission of disease by homograft tissue has focused attention on synthetic materials such as Silastic, Polycel, hydroxylapatite, and Teflon. This study sought to determine the effects of argon and KTP lasers on materials used in stapes and chronic ear surgery. Silastic sheeting, hydroxylapatite and polycel total ossicular replacement prostheses (TORPs) and partial ossicular replacement prostheses (PORPs), and platinum wire/Teflon stapes prostheses were exposed to argon and KTP laser energy at clinical power settings. Effects of the two lasers were similar. The presence of pigment (char or blood) was necessary to produce any effect. Silastic transmitted energy to underlying material. Hydroxylapatite cracked and shattered. Polycel vaporized and melted, as did Teflon. Clinical implications of these interactions on primary and revision otologic surgeries will be discussed. PMID:8388975

  12. Aerobic bacteria from mucous membranes, ear canals, and skin wounds of feral cats in Grenada, and the antimicrobial drug susceptibility of major isolates.

    Science.gov (United States)

    Hariharan, Harry; Matthew, Vanessa; Fountain, Jacqueline; Snell, Alicia; Doherty, Devin; King, Brittany; Shemer, Eran; Oliveira, Simone; Sharma, Ravindra N

    2011-03-01

    In a 2-year period 54 feral cats were captured in Grenada, West Indies, and a total of 383 samples consisting of swabs from rectum, vagina, ears, eyes, mouth, nose and wounds/abscesses, were cultured for aerobic bacteria and campylobacters. A total of 251 bacterial isolates were obtained, of which 205 were identified to species level and 46 to genus level. A commercial bacterial identification system (API/Biomerieux), was used for this purpose. The most common species was Escherichia coli (N=60), followed by Staphylococcus felis/simulans (40), S. hominis (16), S. haemolyticus (12), Streptococcus canis (9), Proteus mirabilis (8), Pasteurella multocida (7), Streptococcus mitis (7), Staphylococcus xylosus (7), S. capitis (6), S. chromogenes (4), S. sciuri (3), S. auricularis (2), S. lentus (2), S. hyicus (2), Streptococcus suis (2) and Pseudomonas argentinensis (2). Sixteen other isolates were identified to species level. A molecular method using 16S rRNA sequencing was used to confirm/identify 22 isolates. Salmonella or campylobacters were not isolated from rectal swabs. E. coli and S. felis/simulans together constituted 50% of isolates from vagina. S. felis/simulans was the most common species from culture positive ear and eye samples. P. multocida was isolated from 15% of mouth samples. Coagulase-negative staphylococci were the most common isolates from nose and wound swabs. Staphylococcus aureus, or S. intemedius/S. pseudintermedius were not isolated from any sample. Antimicrobial drug resistance was minimal, most isolates being susceptible to all drugs tested against, including tetracycline. PMID:20627391

  13. CLINICO-PATHOLOGICAL STUDY OF EXTRACRANIAL COMPLICATIONS OF MIDDLE EAR INFECTIONS

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    Sitashree

    2014-03-01

    Full Text Available Suppurative otitis media is a common occurrence and so are its complications. Its various complications are of frequent occurrence in otorhinolaryngology clinics. The incidence of extracranial ones are still posing a problem to the otologists Present work has been, undertaken from September 2010 to September 2012 to study the incidence of extracranial complications in relation to suppurative otitis media and to study the clinical presentation and pathology of extracranial complications of suppurative otitis media. Total 6130 cases of suppurative otitis media were observed (23.96%. Out of these patients 4890 cases (19.11% were having chronic suppurative otitis media (CSOM and 1240 cases (4.85% had acute suppurative otitis medi (ASOM.In the present study, it is seen that 23.96% of total patients were having suppurative otitis media. The incidence of complications due to ASOM is 1.45%. Mastoiditis comprises of 59.35% of total extracranial complications and is the commonest in the present series followed by subperiosteal abscess, labyrinthitis and facial palsy. The prevalence can be decreased by means of health awareness regarding how to take care of the ear and when to report the physician.

  14. Diffusion Weighted MR Imaging of Primary and Recurrent Middle Ear Cholesteatoma: An Assessment by Readers with Different Expertise

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    A. Elefante

    2015-01-01

    Full Text Available Introduction and Purpose. Diffusion weighted imaging (DWI has been proven to be valuable in the diagnosis of middle ear cholesteatoma. The aims of our study were to evaluate the advantage of multi-shot turbo spin echo (MSh TSE DWI compared to single-shot echo-planar (SSh EPI DWI for the diagnosis of cholesteatoma. Material and Methods. Thirty-two patients with clinical suspicion of unilateral cholesteatoma underwent preoperative MRI (1.5T with SSh EPI and MSh TSE. Images were separately analyzed by 4 readers with different expertise to confirm the presence of cholesteatoma. Sensitivity, specificity, diagnostic accuracy, and positive (PPV and negative predictive values (NPV were assessed for each observer and interrater agreement was assessed using kappa statistics. Diagnosis was obtained at surgery. Results. Overall MSh TSE showed higher diagnostic accuracy and lower negative predictive value (NPV compared to conventional SSh EPI. Interreader agreement between the observers revealed the superiority of MSh TSE compared to SSh EPI. Interrater agreement among all the four observers was higher by using MSh TSE compared to SSh EPI. Conclusion. Our findings suggest that MSh TSE DWI has higher sensitivity for detection of cholesteatoma and lower probability of misdiagnosis. MSh TSE DWI is useful in guiding less experienced observers to the diagnosis.

  15. Synergistic effect of interleukin 1 alpha on nontypeable Haemophilus influenzae-induced up-regulation of human beta-defensin 2 in middle ear epithelial cells

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    Park Raekil

    2006-01-01

    Full Text Available Abstract Background We recently showed that beta-defensins have antimicrobial activity against nontypeable Haemophilus influenzae (NTHi and that interleukin 1 alpha (IL-1 alpha up-regulates the transcription of beta-defensin 2 (DEFB4 according to new nomenclature of the Human Genome Organization in human middle ear epithelial cells via a Src-dependent Raf-MEK1/2-ERK signaling pathway. Based on these observations, we investigated if human middle ear epithelial cells could release IL-1 alpha upon exposure to a lysate of NTHi and if this cytokine could have a synergistic effect on beta-defensin 2 up-regulation by the bacterial components. Methods The studies described herein were carried out using epithelial cell lines as well as a murine model of acute otitis media (OM. Human cytokine macroarray analysis was performed to detect the released cytokines in response to NTHi exposure. Real time quantitative PCR was done to compare the induction of IL-1 alpha or beta-defensin 2 mRNAs and to identify the signaling pathways involved. Direct activation of the beta-defensin 2 promoter was monitored using a beta-defensin 2 promoter-Luciferase construct. An IL-1 alpha blocking antibody was used to demonstrate the direct involvement of this cytokine on DEFB4 induction. Results Middle ear epithelial cells released IL-1 alpha when stimulated by NTHi components and this cytokine acted in an autocrine/paracrine synergistic manner with NTHi to up-regulate beta-defensin 2. This synergistic effect of IL-1 alpha on NTHi-induced beta-defensin 2 up-regulation appeared to be mediated by the p38 MAP kinase pathway. Conclusion We demonstrate that IL-1 alpha is secreted by middle ear epithelial cells upon exposure to NTHi components and that it can synergistically act with certain of these molecules to up-regulate beta-defensin 2 via the p38 MAP kinase pathway.

  16. TNF-R2 expression in acquired middle ear cholesteatoma Expressão do TNF-R2 no colesteatoma adquirido da orelha média

    OpenAIRE

    Rodrigo Faller Vitale; Celina Siqueira Barbosa Pereira; Adriana Leal Alves; Jose Humberto Tavares Guerreiro Fregnani; Fernando Quintanilha Ribeiro

    2011-01-01

    Acquired middle ear cholesteatoma is a disease which promotes bone erosion resulting in potentially serious complications. The tumor necrosis factor alpha (TNF-α) is present in cholesteatoma and it is related to bone erosion, as shown by different authors. To understand the aggressiveness characteristics of cholesteatoma is necessary, however, to better address the presence and distribution of their receptors. OBJECTIVE: To evaluate the expression of type 2 TNF-α receptor (TNF-R2) i...

  17. Classification and diagnosis of ear malformations

    OpenAIRE

    Bartel-Friedrich, Sylva; Wulke, Cornelia

    2008-01-01

    In the ENT region 50% of the malformations affect the ear. Malformations of the outer and middle ear are predominantly unilateral (ca. 70-90%) and mostly involve the right ear. Inner ear malformations can be unilateral or bilateral. The incidence of ear malformations is approximately 1 in 3800 newborns. Ear malformations may be genetic (associated with syndromes or not, with family history, spontaneous mutations) or acquired in nature. Malformations can affect the outer ear (pinna and externa...

  18. Images of the middle and inner ear using limited-cone-beam 3D X-ray CT (Ortho-CT)

    International Nuclear Information System (INIS)

    To report the high quality images of middle and inner ear obtained using limited-cone-beam three-dimensional x-ray CT (Ortho-CT) developed by authors. We have developed and reported about principle and images of Ortho-CT. This system is small three-dimensional X-ray CT which is remodeled from the multi-functional tomographic machine for dental use (ScanoraTM, Soredex Co., Helsinki, Finland). The patient who is examined can sit down on the chair of the system and his head is fixed. X-ray sensor used is 4 inches imaging intensifier (I.I.). The size of X-ray beam is 32 mm high and 40 mm width at rotational center. The exposure conditions are consisted of 85 kVp, 10 mA, adder filter 1 mm Cu and 3 mm Al. The exposure time is 17 seconds. The 512 projection images from 360 degree are recorded on the personal computer (Pentium II 333 MHz Intel, USA). CT images are reconstructed from the projection images. The reconstruction time is about 7 minutes using personal computer system (Pentium III 550 MHz, Intel, USA). The voxel is ortho-cubic figure (each side of size: 0.136 mm). The figure of imaging area is cylinder type (32 mm high, 38 mm diameter). In this study, the middle and inner ear of a volunteer (61-years-old male) was examined with this system to evaluate its performance. The images obtained were very high quality. Therefore the images of the auditory ossicles and inner ear can be very useful for the diagnosis of small bone destruction by the pathosis. We developed limited-cone-beam three-dimensional x-ray CT. The images of inner ear and auditory ossicles were shown with a very high quality using this system. The system is expected to be applied for clinical use to the diagnosis of the ear disease. (author)

  19. Accumulation of Regulatory T Cells and Chronic Inflammation in the Middle Ear in a Mouse Model of Chronic Otitis Media with Effusion Induced by Combined Eustachian Tube Blockage and Nontypeable Haemophilus influenzae Infection.

    Science.gov (United States)

    Hirano, Takashi; Kodama, Satoru; Kawano, Toshiaki; Suzuki, Masashi

    2016-01-01

    Nontypeable Haemophilus influenzae (NTHi) is associated with chronic otitis media (COM). In this study, we generated a murine model of COM by using eustachian tube (ET) obstruction and NTHi (10(7) CFU) inoculation into the tympanic bulla, and we investigated the relationship between regulatory T cells (Treg) and chronic inflammation in the middle ear. Middle ear effusions (MEEs) and middle ear mucosae (MEM) were collected at days 3 and 14 and at 1 and 2 months after inoculation. Untreated mice served as controls. MEEs were used for bacterial counts and to measure the concentrations of cytokines. MEM were collected for histological evaluation and flow cytometric analysis. Inflammation of the MEM was prolonged throughout this study, and the incidence of NTHi culture-positive MEE was 38% at 2 months after inoculation. The levels of interleukin-1β (IL-β), tumor necrosis factor alpha, IL-10, and transforming growth factor β were increased in the middle ear for up to 2 months after inoculation. CD4(+) CD25(+) FoxP3(+) Treg accumulated in the middle ear, and the percentage of Treg in the MEM increased for up to 2 months after inoculation. Treg depletion induced a 99.9% reduction of bacterial counts in MEEs and also significantly reduced the ratio of NTHi culture-positive MEE. The levels of these cytokines were also reduced in MEEs. In summary, we developed a murine model of COM, and our findings indicate that Treg confer infectious tolerance to NTHi in the middle ear. PMID:26553466

  20. Cognitive enhancement in middle-aged and old cats with dietary supplementation with a nutrient blend containing fish oil, B vitamins, antioxidants and arginine.

    Science.gov (United States)

    Pan, Yuanlong; Araujo, Joseph A; Burrows, Joey; de Rivera, Christina; Gore, Asa; Bhatnagar, Sandeep; Milgram, Norton W

    2013-07-14

    Cognitive dysfunction syndrome is a major disease affecting old cats and is the consequence of severe and irreversible loss of brain cells and brain atrophy. The present study focused on the hypothesis that the optimal strategy for promoting successful brain ageing is to target risk factors associated with brain ageing and dementia. We used a nutritional strategy involving supplementation with a blend of nutrients (antioxidants, arginine, B vitamins and fish oil) to test this hypothesis. Middle-aged and old cats between 5·5 and 8·7 years of age were assigned to cognitively equivalent control or treatment groups based on prior cognitive experience and performance on baseline cognitive tests. The cats in the treatment group were maintained on a diet supplemented with the nutrient blend and the cats in the control group were maintained on the identical base diet without the additional supplementation. After an initial wash-in period, all cats were tested on a battery of cognitive test protocols. The cats fed the test diet showed significantly better performance on three of four test protocols: a protocol assessing egocentric learning, a protocol assessing discrimination and reversal learning and a protocol focused on acquisition of a spatial memory task. The results support the hypothesis that brain function of middle-aged and old cats can be improved by the nutrient blend that was selected to minimise or eliminate the risk factors associated with brain ageing and dementia. PMID:23211671

  1. Postoperative Intensity-Modulated Radiotherapy for Squamous Cell Carcinoma of the External Auditory Canal and Middle Ear: Treatment Outcomes, Marginal Misses, and Perspective on Target Delineation

    International Nuclear Information System (INIS)

    Purpose: To report outcomes of the rare disease of squamous cell carcinoma (SCC) of the external auditory canal (EAC) and middle ear treated with surgery and postoperative intensity-modulated radiotherapy (IMRT). Failure patterns related to spatial dose distribution were also analyzed to provide insight into target delineation. Methods and Materials: A retrospective review was conducted of the records of 11 consecutive patients with SCC of the EAC and middle ear who were treated with curative surgery and postoperative IMRT at one institution between January 2007 and February 2010. The prescribed IMRT dose was 60 to 66 Gy at 2 Gy per fraction. Three patients also received concurrent cisplatin-based chemotherapy, and 1 patient received concurrent oral tegafur/uracil. The median follow-up time was 19 months (range, 6–33 months). Results: Four patients had locoregional recurrence, yielding an estimated 2-year locoregional control rate of 70.7%. Among them, 1 patient had persistent disease after treatment, and 3 had marginal recurrence. Distant metastasis occurred in 1 patient after extensive locoregional recurrence, yielding an estimated 2-year distant control rate of 85.7%. The estimated 2-year overall survival was 67.5%. The three cases of marginal recurrence were near the preauricular space and glenoid fossa of the temporomandibular joint, adjacent to the apex of the ear canal and glenoid fossa of the temporomandibular joint, and in the postauricular subcutaneous area and ipsilateral parotid nodes, respectively. Conclusions: Marginal misses should be recognized to improve target delineation. When treating SCC of the EAC and middle ear, care should be taken to cover the glenoid fossa of the temporomandibular joint and periauricular soft tissue. Elective ipsilateral parotid irradiation should be considered. The treatment planning procedure should also be refined to balance subcutaneous soft-tissue dosimetry and toxicity.

  2. Postoperative Intensity-Modulated Radiotherapy for Squamous Cell Carcinoma of the External Auditory Canal and Middle Ear: Treatment Outcomes, Marginal Misses, and Perspective on Target Delineation

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Wan-Yu [Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan (China); Kuo, Sung-Hsin [Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan (China); Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan (China); Chen, Yu-Hsuan; Lu, Szu-Huai; Tsai, Chiao-Ling [Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan (China); Chia-Hsien Cheng, Jason [Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan (China); Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan (China); Graduate Institute of Oncology, National Taiwan University College of Medicine, Taipei, Taiwan (China); Hong, Ruey-Long [Division of Medical Oncology, Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan (China); Chen, Ya-Fang [Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan (China); Hsu, Chuan-Jen; Lin, Kai-Nan; Ko, Jenq-Yuh; Lou, Pei-Jen; Wang, Cheng-Ping [Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan (China); Chong, Fok-Ching [Graduate Institute of Electrical Engineering, National Taiwan University, Taipei, Taiwan (China); Wang, Chun-Wei, E-mail: cwwang@ntuh.gov.tw [Graduate Institute of Electrical Engineering, National Taiwan University, Taipei, Taiwan (China)

    2012-03-15

    Purpose: To report outcomes of the rare disease of squamous cell carcinoma (SCC) of the external auditory canal (EAC) and middle ear treated with surgery and postoperative intensity-modulated radiotherapy (IMRT). Failure patterns related to spatial dose distribution were also analyzed to provide insight into target delineation. Methods and Materials: A retrospective review was conducted of the records of 11 consecutive patients with SCC of the EAC and middle ear who were treated with curative surgery and postoperative IMRT at one institution between January 2007 and February 2010. The prescribed IMRT dose was 60 to 66 Gy at 2 Gy per fraction. Three patients also received concurrent cisplatin-based chemotherapy, and 1 patient received concurrent oral tegafur/uracil. The median follow-up time was 19 months (range, 6-33 months). Results: Four patients had locoregional recurrence, yielding an estimated 2-year locoregional control rate of 70.7%. Among them, 1 patient had persistent disease after treatment, and 3 had marginal recurrence. Distant metastasis occurred in 1 patient after extensive locoregional recurrence, yielding an estimated 2-year distant control rate of 85.7%. The estimated 2-year overall survival was 67.5%. The three cases of marginal recurrence were near the preauricular space and glenoid fossa of the temporomandibular joint, adjacent to the apex of the ear canal and glenoid fossa of the temporomandibular joint, and in the postauricular subcutaneous area and ipsilateral parotid nodes, respectively. Conclusions: Marginal misses should be recognized to improve target delineation. When treating SCC of the EAC and middle ear, care should be taken to cover the glenoid fossa of the temporomandibular joint and periauricular soft tissue. Elective ipsilateral parotid irradiation should be considered. The treatment planning procedure should also be refined to balance subcutaneous soft-tissue dosimetry and toxicity.

  3. Microbiota indígena do meato acústico externo de gatos hígidos Normal microflora of the ear canal in healthy cats

    Directory of Open Access Journals (Sweden)

    Ricardo Coutinho do Amaral

    1998-09-01

    Full Text Available Cinqüenta felinos hígidos, adultos - vinte e seis machos e vinte e quatro fêmeas - sem definição racial, com distintas idades, reunidos em dois grupos (GRUPO 1- animais domiciliados e GRUPO 2 - animais que rendados de vinte e cinco animais cada. Após anamnese e prévia sedação, os gatos foram submetidos a exame físico e à otoscopia, comprovando-se a ausência de lesões meatais e timpânicas, com cureta de Buck e wragatoas estéreis, foi colhido material meatal, que foi então submetido a exames bacteriológico e micológico. No Grupo 1, foi evidenciado presença de Otodectes cynotis (4% das amostras, em 72% dos casos de bolores e leveduras (Cladosporium sp 66,6%, Malassezia sp 40%, Penicillium sp 33%, Aspergillus sp 33,3%, Rhodotorula sp 20,0%, Mycelia sp 13,3% e Alternaria sp, Aureobasidium sp, Ryzopus sp, Trichosporon sp, todos com 6,6% e, finalmente, em 64% da amostragem, bactérias dos gêneros Staphylococcus spp (81,2%, Pseudomonas sp (12,5%, Klebsiella sp (12,5%, Acinetobacter sp, Bacilos difteróides, Enterobacter sp, Lactobacillus spp (todos com 6,2%. No Grupo 2, o Otodectes sp foi identificado em 36% das amostras, em 96% daquelas isolaram-se fungos dos gêneros: Malassezia sp - 54,1%, Aspergillus e Penicillium sp, ambos com 33,3%, Microsporum sp - 29,1%, Cladosporium sp - 16,6%, Trichoderma sp - 12,5%, Alternaria e Phoma sp, ambos com 8,3% e Epicoccum sp, Neurospora sp. Mycelia sp, Rhodotorula sp, todos com 4,1% e, por fim, em 20 das 25 amostras (80% isolaram-se pelo menos uma cepa bacteriana (Staphylococcus spp 75%, Klebsiella sp 20,8%, Bacilos difteróides 12,5%, Pseudomonas sp, 8,3% e Acinetobacter sp, Enterobacter sp e Escherichia sp, todos com 4,1% cada um em cultivo monoespecífico ou em associação.The study aimed to find out the frequency of microrganisms in the external ear canal in healthy cats. Fifty adult male (26 and female (24 short hair cats were utilized for the purpose, and they were divided according to

  4. Primary investigations on the potential of a novel diode pumped Er:YAG laser system for middle ear surgery

    Science.gov (United States)

    Stock, Karl; Wurm, Holger; Hausladen, Florian

    2016-02-01

    Flashlamp pumped Er:YAG lasers are successfully used clinically for both precise soft and hard tissue ablation. Since several years a novel diode pumped Er:YAG laser system (Pantec Engineering AG) is available, with mean laser power up to 40 W and pulse repetition rate up to 1 kHz. The aim of the study was to investigate the suitability of the laser system specifically for stapedotomy. Firstly an experimental setup was realized with a beam focusing unit and a computer controlled translation stage to move the samples (slices of porcine bone) with a defined velocity while irradiation with various laser parameters. A microphone was positioned in a defined distance to the ablation point and the resulting acoustic signal of the ablation process was recorded. For comparison, measurements were also performed with a flash lamp pumped Er:YAG laser system. After irradiation the resulting ablation quality and efficacy were determined using light microscopy. Using a high speed camera and "Töpler-Schlierentechnik" the cavitation bubble in water after perforation of a bone slice was investigated. The results show efficient bone ablation using the diode pumped Er:YAG laser system. Also a decrease of the sound level and of the cavitation bubble volume was observed with decreasing pulse duration. Higher repetition rates lead to a slightly increase of thermal side effects but have no influence on the ablation efficiency. In conclusion, these first experiments demonstrate the high potential of the diode pumped Er:YAG laser system for use in middle ear surgery.

  5. Ear emergencies

    Science.gov (United States)

    Ear emergencies include objects in the ear canal and ruptured eardrums. ... Children often put objects into their ears. These objects can be hard to remove. The ear canal is a tube of solid bone that is lined with thin, sensitive ...

  6. ROLE OF HIGH RESOLUTION COMPUTED TOMOGRAPHY IN THE EVALUATION OF SUPPURATIVE DISEASES OF MIDDLE EAR AND MASTOIDS AND THEIR COMPLICATIONS WITH SURGICAL CORRELATION

    Directory of Open Access Journals (Sweden)

    Deb Kr

    2016-02-01

    Full Text Available OBJECTIVE High Resolution Computed Tomography (HRCT, a modification of routine CT, provides a direct visual window in the temporal bone providing minute structural details. Purpose of the present study was to evaluate the suppurative diseases of middle ear and mastoid with their complications on HRCT and to correlate these imaging findings surgically. Our study shows good correlation of various HRCT findings in suppurative diseases of middle ear & mastoids with intra-operative findings. MATERIALS AND METHODS This retrospective study included 60 patients who were referred to the Department of Radiodiagnosis, Assam Medical College with clinically suspected temporal bone or ear pathologies. After detailed clinical examination, the patients were subjected to HRCT examination. The imaging findings of all cases were correlated with the surgical findings. RESULTS Out of 60 patients, 63.3% had unsafe CSOM with cholesteatoma. The HRCT findings with surgical correlation showed a high 91.89% sensitivity for identifying cholesteatoma. HRCT also provided good sensitivity for detecting erosion of scutum (90.32%, erosion of ossicular chain (86.96% and erosion of lateral semi-circular canal (80%. HRCT had lower sensitivity (66.67% for identifying facial canal dehiscence. CONCLUSION The HRCT findings showed a good sensitivity with intraoperative findings in identification of cholesteatoma, erosion of scutum, ossicular chain and semi-circular canal.

  7. Ear Infections and Language Development.

    Science.gov (United States)

    Roberts, Joanne E.; Zeisel, Susan A.

    Ear infections in infants and preschoolers can cause mild or moderate temporary hearing loss, which may in turn affect a child's ability to understand and learn language. Noting that providing children with proper medical treatment for ear infections or middle ear fluid is important in preventing possible problems with language development, this…

  8. Comparative evaluation of the biological properties of bone bioimplants Tutoplast® and bioactive ceramic material "Syntekost" when implanted in the middle ear in the experiment

    Directory of Open Access Journals (Sweden)

    Kravchenko S.V.

    2014-09-01

    Full Text Available Background. Trepanation cavity formed during sanitizing operation subsequently leads to a recurrence of inflammation in the middle ear cavity. A special importance in mastoidoplastics is to eliminate the postoperative cavity. One of the current problems is to create an alternative plastic material that could be used for healing of the bone defect with the newly formed bone tissue without causing further injury to the patient. Objective. The purpose of this study was to investigate and compare the features of reparative processes of bone implant Tutoplast® and bioactive ceramic material "Sintekost" as well as to assess the reaction of the inner ear to the materials which were replanted into the tympanic bullae of guinea pigs while creating an experimental model of antromastoidotomy. Methods. Experimental studies were carried out on 72 male guinea pigs of 300-400 g. Depending on the used plastic material animals were divided into 3 groups. Studies were performed on the left ear of the animal, the right ear was used as a control. Animals were withdrawn from the experiment on the 14th, 30th, 90th, 120th, 330th day. To evaluate the results of the study common histological methods were used. Results. After implanting of bioactive ceramic material "Sintekost" into tympanic bullae of guinea pigs signs of resorption of the material were mild and these processes were not always accompanied by the formation of bone tissue. The newly formed bone trabeculae were not observed until 90 day. After implanting cancellous bone crumbs "Tutoplast" into tympanic bullae of guinea pigs the initiation of osteogenesis was observed on the one hand and the resorption of bone fragments on the other. This resulted in formation of newly formed bone tissue whose volume gradually grew, filling the cavity of the tympanic bullae in that area. Implant "Tutoplast" possessed osteoplastic properties, which contributed to the growth of bone, acting as a matrix on which bone islands

  9. Comparison of the Effect of Ondansetrone - Dexamethasone, Dexamethasone – Metoclopeamide and Ondansetron - Normal Saline in Decreasing Post Operative Nausa and Vomitting (PONV after Middle Ear Surgery

    Directory of Open Access Journals (Sweden)

    Haddadi Soudabeh

    2009-09-01

    Full Text Available Background: The incidence of post-operative nausea and vomitting (PONV is increased after middle ear surgery and it may complicate and interact with reconstruction after surgery, so prevention and treatment of these complications are necessary.The aim of this study was to evaluate the efficacy of anti-emetic combinations in decreasing the PONV after middle ear surgery.Materials and methods: This double blind clinical trial was carried out during 2007-2008 on 111 patients of 15-45 years old with ASA I-II who were candidates for elective middle ear surgery under general anesthesia. The patients were divided into three groups. Patients in the ON group received Ondansetrone 0.1mg/kg + Nacl 0.9% 2cc, OD group received Ondansetrone 0.1mg/kg + Dexamethasone 0.15mg/kg and MD group received Dexamethasone 0.15mg/kg+ Metoclopramide 0.15mg/kg intravenously just before the end of surgery. The patients were evaluated for nausea, vomiting, need of anti-emetic drugs and drug dosage in recovery, 1-6, 6-12 and 12-24 hours after operation and then all data were statistically analyzed by SPSS software, Chi-square, ANOVA and t- Test. P<0.05 was significant.Results: There were no significant differences among three groups in age and sex. The incidence of PONV among 3 groups was not significantly different during 24 hours after operation. (P=0.271 but the incidence of PONV in the first six hours was different among 3 groups (P=0.007 (ON: 8.1%, OD: 0%, MD: 21.6%. Also Metoclopramide consumption was significant between three groups. Conclusion: This study showed that the need to anti-emetic drugs in first 6 hours was the least in OD group, but the difference in the incidence of PONV was not significant otherwise.

  10. 放疗后中耳胆固醇肉芽肿的治疗%Cholesterin Granuloma of the Middle Ear in Post-irradiated Patients

    Institute of Scientific and Technical Information of China (English)

    杨海弟; 许耀东; 张志钢; 陈穗俊; 郑亿庆

    2012-01-01

    [目的]研究放疗后中耳胆固醇肉芽肿行乳突根治及鼓室成型术手术的效果.[方法]对在我科确诊为鼻咽癌放疗后中耳胆固醇肉芽肿的9例患者9耳进行手术治疗研究,放疗与手术间隔时间为6~14年(平均9年),术前接受的放射剂量为68~75 Gy.所有患耳采取的手术治疗方法包括开放乳突根治或完壁乳突根治术,同时行鼓室成型,其中3例行开放乳突根治+鼓室成型;6例行完壁乳突根治+鼓室成型.[结果]所有患者术后均随访2年以上,7耳鼓膜完整(占77.8%),2耳在术后3个月出现鼓膜再穿孔,但耳流脓、耳闷塞感明显较术前减少.平均纯音听阈PTA和A-B Gap分别由术前的90.5 dB和45.8 dB改善至术后6个月的62.3dB和25.5 dB.[结论]大多数鼻咽癌放疗后中耳胆固醇肉芽肿患者可采取手术改善症状,放疗引起的慢性中耳炎不是鼓室成型的禁忌证.%[Objective] To evaluate the surgical outcome of mastoidectomy plus tympanoplasty for cholesterin granuloma of the middle ear in post-irradiated patients. [Methods] Nine ears diagnosed cholesterin granuloma in the middle ear in post-irradiated NPC patients were included in this study. The time from radiotherapy termination to surgery ranged from 6 to 14 years (median 9 years). All the patients with NPC received radiotherapy of 68 to 75 Gy before surgery. All patients underwent radical tympanoplasty plus mastoidectomy with canal wall down or up. Three ears underwent canal wall down mastoidectomy plus tympanoplasty and six ears underwent canal wall up mastoidectomy plus tympanoplasty. [Results] All the patients were followed up for 2 years at least. There were 7 ears (77.8%) had intact tympanic membrane and 2 ears developed reperforation of eardrum 3 months after surgery, but otorrhea decreased significantly. All these patients reported improved quality of daily life after the surgery. The pure tone average (PTA) of pre-operation was 90.5 dB and air-bone gap

  11. That Fat Cat

    Science.gov (United States)

    Lambert, Phyllis Gilchrist

    2012-01-01

    This activity began with a picture book, Nurit Karlin's "Fat Cat On a Mat" (HarperCollins; 1998). The author and her students started their project with a 5-inch circular template for the head of their cats. They reviewed shapes as they drew the head and then added the ears and nose, which were triangles. Details to the face were added when…

  12. Serous labyrinthitis as a manifestation of cat scratch disease: a case report

    Directory of Open Access Journals (Sweden)

    Kantas Ilias

    2009-09-01

    Full Text Available Abstract Introduction Cat scratch disease is an infectious disease transmitted by young cats, in which the principal causative factor is Bartonella henselae. The typical course of cat scratch disease is usually benign and self-limited and requires only supportive therapy. However, cases lasting up to 2 years have been reported, and more serious complications may occur. Many manifestations of the disease have been reported by different medical disciplines. Case presentation A case of cat scratch disease in a 71-year-old Greek woman with an unusual clinical course is presented here. Serous otitis media was combined with rotational vertigo due to labyrinthitis. The invaded ear was ipsilateral to the inoculation site. Conclusion Cervicofacial lymphadenopathy has been demonstrated as the most common otolaryngologic manifestation of cat scratch disease. Manifestation in the middle and inner ear has, to the best of our knowledge, not been reported before. Our report presents a patient with cat scratch disease with clinical signs and symptoms in the middle and inner ear.

  13. Computed tomographic appearance of inflammatory polyps in three cats

    International Nuclear Information System (INIS)

    This report describes the use of computed tomography (CT) to evaluate the inner ear, tympanic bullae, nasopharyngeal area, and external ear canals of three cats. All cats presented for evaluation of upper respiratory signs or chronic ear infection. Nasopharyngeal masses were present in two cats, and a mass in the external ear canal was present in the third cat. In all three cats, CT was able to define the extent of osseous bulla involvement, which was confirmed at surgery. Computed tomography also defined the extent of the polyp in the nasopharyngeal area in two cats, and in the external ear canal in one cat. Surgical removal of the polyps was accomplished with a combined oral approach and ventral bulla osteotomy in cats 1 and 2. The polyp was removed from cat 3 using a combination of ventral bulla osteotomy and excision of the mass through the external ear canal. Microscopic examination confirmed all masses as nasopharyngeal (inflammatory) polyps

  14. Cauliflower Ear

    Science.gov (United States)

    ... Snowboarding, Skating Crushes What's a Booger? What's Cauliflower Ear? KidsHealth > For Kids > What's Cauliflower Ear? Print A A A Text Size Have you ever seen someone whose ear looks bumpy and lumpy? The person might have ...

  15. Swimmer's Ear

    Science.gov (United States)

    ... Medical Words En Español What Other Kids Are Reading Back-to-School Butterflies? Read This Chloe & Nurb ... TOPIC Taking Care of Your Ears Can Loud Music Hurt My Ears? What Is an Ear Infection? ...

  16. Virtual endoscopy of the middle ear: experimental and clinical results of a standardised approach using multi-slice helical computed tomography

    International Nuclear Information System (INIS)

    Virtual endoscopy (VE) enables non-invasive 3D endoluminal imaging of the middle ear by post-processing of CT data. To optimise the clinical application a standardised approach was evaluated in normal and pathologic cases. Data acquisition was performed using multi-slice helical CT in 20 normal patients and 15 patients with malformation or trauma. Virtual endoscopy of the tympanic cavity and 3D images of the ossicles were generated using surface and volume rendering. Qualitative assessment of the representation of anatomical structures was performed in normal patients. In 15 pathological cases the diagnostic benefit was evaluated by comparing the 3D images to the 2D images and intra-operative findings. In all 35 cases 3D imaging was possible using the standardised approach. The ossicular chain as well as the bony and soft tissue structures of the tympanic cavity were visualised in 20 normal patients. In 7 of 8 patients with malformation and 1 of 7 patients with trauma the original diagnosis was changed by 3D imaging. Standardisation and evaluation of the method in normal patients is essential as it enhances the diagnostic reliability. Virtual endoscopy facilitates understanding of the complex anatomy of the middle ear. In cases of suspected malformation and confirmed trauma it is helpful for diagnosis and surgical planning. (orig.)

  17. Ear wax

    OpenAIRE

    Browning, George GG

    2008-01-01

    Ear wax only becomes a problem if it causes a hearing impairment, or other ear-related symptoms. Ear wax is more likely to accumulate and cause a hearing impairment when normal extrusion is prevented — for example, by hearing aids, or by the use of cotton buds to clean the ears.Ear wax can visually obscure the ear drum, and may need to be removed for diagnostic purposes.

  18. Detection of ossicular chain abnormalities using CT imaging. Comparison of axial and virtual middle ear endoscopic imaging

    International Nuclear Information System (INIS)

    The purpose of this study was to evaluate the usefulness of axial and three-dimensional imaging (virtual endoscopy) with helical CT for the detection of ossicular chain abnormalities. In 15 patients who had traumatic ossicular dislocation, disruption, and congenital ossicular defect and anomaly, axial helical CT scanning of the temporal bone was performed with GE HSA. Axial and three-dimensional imaging was carried out in normal ears (15 ears) and abnormal ears (10 ears), for the detection of ossicular chain abnormalities. Diagnostic accuracy was evaluated by receiver-operating-characteristic (ROC) curve analysis using a continuous reporting scale. Furthermore, ROC testing was done to determine the sensitivity, specificity, and accuracy of the detection of ossicular chain abnormalities. Diagnostic accuracy in the detection of ossicular chain abnormalities with three-dimensional imaging (Az=0.967, SD=0.022) was not significantly better than that of axial imaging (Az=0.930, SD=0.046); however, the interobserver standard deviation was better for three-dimensional imaging. Three-dimensional imaging resulted in an increase in true positive cases and a decrease in false negatives. Three-dimensional imaging also showed higher sensitivity and accuracy. In the evaluation of ossicular chain abnormalities, three-dimensional imaging (virtual endoscopy) is useful and provides additional information. Three-dimensional imaging may have an important role in diagnostic procedures and/or preoperative evaluation in otology. (author)

  19. Differential Gene Expression in the Otic Capsule and the Middle Ear-An Annotation of Bone-Related Signaling Genes

    DEFF Research Database (Denmark)

    Nielsen, Michelle C.; Martin-Bertelsen, Tomas; Friis, Morten;

    2015-01-01

    Hypothesis: A number of bone-related genes may be responsible for the unique suppression of perilabyrinthine bone remodeling. Background: Bone remodeling is highly inhibited around the inner ear space most likely because of osteoprotegerin (OPG), which is a well-known potent inhibitor of osteoclast...

  20. A Study of Relationship between the Acoustic Sensitivity of Vestibular System and the Ability to Trigger Sound-Evoked Muscle Reflex of the Middle Ear in Adults with Normal Hearing

    Directory of Open Access Journals (Sweden)

    S.F. Emami

    2014-07-01

    Full Text Available Introduction & Objective: The vestibular system is sound sensitive and the sensitivity is related to the saccule. The vestibular afferents are projected to the middle ear muscles (such as the stapedius. The goal of this research was studying the relationship between the vestibular hearing and the sound-evoked muscle reflex of the middle ear to 500 HZ. Materials & Methods: This study was a cross sectional-comparison done in audiology department of Sheikholreis C‍‍linic (Hamadan, Iran. The study groups consisted of thirty healthy people and thirty patients with benign paroxysmal positional vertigo. Inclusion criteria of the present study were to have normal hearing on pure tone audiometry, acoustic reflex, and speech discrimination scores. Based on ipsilateral acoustic reflex test at 500HZ, they were divided to normal and abnormal groups. Then they were evaluated by cervical vestibular evoked myogenic potentials (cVEMPs and finally classified in three groups (N Normal ear , (CVUA Contra lateral vertiginous ear with unaffected saccular sensitivity to sound,(IVA Ipsilateral vertiginous ear with affected saccular sensitivity to sound. Results: Thirty affected ears (IVA with decreased vestibular excitability as detected by ab-normal cVEMPs, revealed abnormal findings of acoustic reflex at 500HZ. Whereas, both un-affected (CVUA and normal ears (N had normal results. Multiple comparisons of mean values of cVEMPs (p13,n23 and acoustic reflex at500HZ among the three groups were sig-nificant. The correlation between acoustic reflex at 500HZ and p13 latencies was significant. The n23 latencies showed significant correlation with acoustic reflex at 500HZ. Conclusion: The vestibular sensitivity to sound retains the ability to trigger sound-evoked re-flex of the middle ear at 500 HZ. (Sci J Hamadan Univ Med Sci 2014; 21 (2:99-104

  1. Ear canal cholesteatoma.

    Science.gov (United States)

    Holt, J J

    1992-06-01

    Although cholesteatomas are more commonly found in the middle ear and the mastoid, the disease can occur in the external ear canal. All cases of ear canal cholesteatoma treated by the author were reviewed. There were nine ears in seven patients, who had an average age of 62 years. The lesions ranged in size from a few millimeters to extensive mastoid destruction. Smaller lesions can be managed by frequent cleaning as an office procedure. Larger lesions require surgery, either canaloplasty or mastoidectomy. The otolaryngologist should suspect this disease in the elderly. Microscopic examination of the ear with meticulous cleaning of all wax, especially in elderly patients, is most useful in detecting early disease. Frequent applications of mineral oil to the canal should be used in the management of the disease and to prevent recurrence. PMID:1376388

  2. Ear Pieces

    Science.gov (United States)

    DiJulio, Betsy

    2011-01-01

    In this article, the author describes an art project wherein students make fanciful connections between art and medicine. This project challenges students to interpret "ear idioms" (e.g. "blow it out your ear," "in one ear and out the other") by relying almost entirely on realistic ear drawings, the placement of them, marks, and values. In that…

  3. Effect on cochlea function of guinea pig after controlled release recombinant human bone morphogenetic protein 2 transplanted into the middle ear

    Institute of Scientific and Technical Information of China (English)

    LI Xue-sheng; SUN Jian-jun; JIANG Wei; LIU Xiao

    2010-01-01

    Background The recombinant human bone morphogenetic protein 2 (rhBMP-2) has been used to induce osteogenesis in animals' middle ear and this technique is possible to be used to reconstruct the defects of ossicles. The side effects of the rhBMP-2 in middle ear should be observed before using in clinic. Thus we prepared the controlled release rhBMP-2 and implanted it into the acoustic bulla of guinea pigs. The effect on the cochlea was observed. Methods We prepared the acellular cancellous bone, accompanied with rhBMP-2. The material accompanied with rhBMP-2 was implanted into one acoustic bulla of the animal and the opposite side of the acoustic bulla was implanted with acellular cancellous bone without rhBMP-2. Totally 20 guinea pigs were undergone this procedure. After the operation, the auditory brainstem response (ABR) of the animals was tested according to the time sequence. Three months after the operation, the animals were sacrificed. The osteogenesis induced by rhBMP-2, the acoustic bulla and cochlea affected by rhBMP-2 were observed. The structures of hair cells were observed after silver nitrate staining. Results The animals were recovered soon after surgery. The hearing thresholds of the animals were declined slightly just after the surgery and come back completely after 3 months. Also, the bulla and cochlea were normal in shape. The osteogenesis occurred in the pore of the acellular cancellous bone with rhBMP-2. There was not any abnormal hyperplasia of bone in the bulla and cochlea. The articulation between the stapes and oval window was not merged. The shapes of the hair cells were normal and there was no obvious deletion of the hair cells compared with control group. Conclusions The controlled release rhBMP-2 transplanted into the middle ear could induce osteogenesis in the bulla of the animals. It did not affect the shape of the bulla and the hearing threshold of the animal, and did not induce the abnormal hyperplasia of bone in the bulla and might

  4. Single Prophylactic Dose Of Dexamethasone Antiemetic Versus Ondansteron In Patients Undergoing Middle Ear Surgery: A Comparative Clinical And Experimental Animal Study

    Directory of Open Access Journals (Sweden)

    Khaled Taha

    2003-06-01

    Full Text Available This prospective, randomized, double-blinded, placebo-controlled study in which 150 ASA I-II patients scheduled for middle ear surgery were randomized into three equal groups. The dexamethasone group (group D received a single dose of dexamethasone 10 mg IV at induction of anesthesia, ondansetron group (group O received 4 mg IV ondansetron and the control group (group C received 5 ml saline IV as placebo by the same technique. The study demonstrated that the incidence of early postoperative nausea, retching and vomiting (PONV was significantly greater in the placebo group than the dexamethasone group (P 0.05. More over, the severity of late PONV (6-24h was markedly less in the dexamethasone group than the ondansetron group (P< 0.05 and still the incidence of late PONV was markedly less in both dexamethasone and ondansetron groups than the control group (P< 0.001. The study also reported that postoperative analgesic requirement was notably lower in the dexamethasone group than the ondansetron and control groups. An experimental animal study was also done to assess the extrapyramidal reaction associated with the use of both dexamethasone and ondansetron. Increasing doses of both drugs were given IV to the rats, up to 5 times the therapeutic dose of each drug. The rats then stimulated for 24h after injection by light, sound and 6 volt electric current in the Rat Conditioning Chamber. No one rat developed akathisa or acute dystonic reaction. In conclusion, dexamethasone and ondansetron were quite effective and have limited side-effects profile when given as single prophylactic antiemetic doses in patients undergoing middle ear surgery. The advantages of dexamethasone over ondansetron were its prolonged antiemetic effect, its analgesic effect and the lower cost.

  5. Classification and diagnosis of ear malformations

    Directory of Open Access Journals (Sweden)

    Bartel-Friedrich, Sylva

    2007-01-01

    Full Text Available In the ENT region 50% of the malformations affect the ear. Malformations of the outer and middle ear are predominantly unilateral (ca. 70-90% and mostly involve the right ear. Inner ear malformations can be unilateral or bilateral. The incidence of ear malformations is approximately 1 in 3800 newborns. Ear malformations may be genetic (associated with syndromes or not, with family history, spontaneous mutations or acquired in nature. Malformations can affect the outer ear (pinna and external auditory canal, EAC, middle ear and inner ear, not infrequently in combination. Formal classification is advisable in order to be able to predict the prognosis and compare treatment schedules. Various classifications have been proposed: pinna and EAC malformations according to Weerda [1], middle ear malformations according to Kösling [2], and inner ear malformations according to Jackler [3], [4], to Marangos [5] and to Sennaroglu [6]. Additionally, we describe Altmann’s classification of atresia auris congenita [7] and the Siegert-Mayer-Weerda score [8] for EAC and middle ear malformations, systems of great practicability that are in widespread clinical use. The diagnostic steps include clinical examination, audiological testing, genetic analysis and, especially, CT and MRI. These imaging methods are most usefully employed in combination. Precise description of the malformations by means of CT and MRI is indispensable for the planning and successful outcome of operative ear reconstruction and rehabilitation procedures, including cochlear implantation.

  6. Pierced Ears

    Science.gov (United States)

    ... clean your ears and put ear cleaning solution, rubbing alcohol, or antibiotic ointment on them. Whoever is doing ... Use a cotton ball or swab to apply rubbing alcohol or antibiotic ointment to the earlobe or lobes. ...

  7. Ear examination

    Science.gov (United States)

    ... page: //medlineplus.gov/ency/article/003340.htm Ear examination To use the sharing features on this page, ... ear References King EF, Couch ME. History, physical examination, and the preoperative evaluation. In: Flint PW, Haughey ...

  8. Computer tomography of the temporal bones in children with developmental anomalies of the external and middle ear

    International Nuclear Information System (INIS)

    Computer polypositional high-resolution tomography (CT)was provided to 45 children with dysplasia of the external acoustic meatus (EAM). The computed tomograms were analyzed in accordance with the scheme which included the evaluation of the following structures: atresia or stenosis area, pneumatized mastoid process, tympanic cavity, antrum, osteal opening of the Eustachian tube, chain of auditory ossicles, windows of the labyrinth, internal ear, facial nerve canal, and large vessels. Preoperative CT of the temporal bones allows for the evaluation of the above-listed structures, which is of paramount importance for the planning of the patient management policy. Also, CT enables the assessment of the risk of surgical intervention associated with a potential injury to the facial nerve, large vessels, and temporomandibular articulation. CT is to be an indispensable diagnostic modality for examination of children presenting with EAM dysplasia

  9. A case of neuroglia choristoma in middle ear%中耳神经胶质迷芽瘤1例

    Institute of Scientific and Technical Information of China (English)

    李康; 张志茂

    2013-01-01

    A 14-year-old young man presented with a white oval mass on the right side of external auditory canal.Physical examination:Under ear endoscope,a size of 0.6 cm × 0.8 cm× 0.6 cm,smooth and unmovable mass was on the right side of external auditory canal.In surgery,a cystic neoplasm which is connected to neoplasm of the external auditory canal by bone defect was found in aditus of drum sinus,and local bone defect in the back wall of drum sinus.Tympanic membrane and auditory ossicle chain is complete.Postoperative pathologic findings were consistent with neuroglia choristoma.The diagnosis mainly relied on the postoperative pathological findings.

  10. Estudio morfológico del oído medio e interno de la Chinchilla laniger Morphological study of the middle and internal ear of Chinchilla laniger

    Directory of Open Access Journals (Sweden)

    Loreto Carrasco M

    2008-12-01

    ; nevertheless, a macroscopic and microscopic detailed study of the ear in this animal is lacking. Purposes: Jo describe the anatomy and histology of the middle and inner ear of Chinchilla laniger. Materials and methods: Five adult chinchillas were used in this study. The macroscopic study was made with a computed tomography of the ear and then dissection under a microscope. For the microscopic study ears were dissected, fixed, decalcified, included in paraffin and then sectioned and stained with hematoxylin-eosin. Results: A tympanomeatal flap was made vía the external acoustic meatus, similar to a stapedectomy The tympanic cavity was accessed through the posterosuperior quadrant to examine the malleus. A thin manubrium attached vertically to the eardrum could be observed. The malleus head is characterized by a large anterior process, instead of the anterior tympanomallear ligament, and it was fused to the incus. The lenticular process of the latter joined a thin stapedius, in which the vestige of the stapedial artery was observed (between the cruras. The promontory was visible easily because ofits size and prominence. The oval window was located more superoanterior than the round window. The cochiea gave 31/2 turns around the modiolus. The organ of Corti, saccule, utricle and ampullary crest were identified in the histological sections. Conclusions: The ear of Chinchilla laniger is similar to the human ear supporting its use as a model in ear research. The study of the ear specially the cochiea, is difficult and needs great dedication in order to obtain good results.

  11. Detection of respiratory pathogens in pediatric acute otitis media by PCR and comparison of findings in the middle ear and nasopharynx.

    Science.gov (United States)

    Yatsyshina, Svetlana; Mayanskiy, Nikolay; Shipulina, Olga; Kulichenko, Tatiana; Alyabieva, Natalia; Katosova, Lyubovj; Lazareva, Anna; Skachkova, Tatyana; Elkina, Maria; Matosova, Svetlana; Shipulin, German

    2016-05-01

    We conducted a series of polymerase chain reactions (PCRs) in order to detect bacteria (7 species) and viruses (17 species) in middle ear fluid (MEF) and nasopharynx (Nph) of children with acute otitis media (AOM; n=179). Bacterial and viral nucleic acids were detected in MEF of 78.8% and 14.5% patients, respectively. The prevalence was as follows: Streptococcus pneumoniae, 70.4%; Haemophilus influenzae, 17.9%; Staphylococcus aureus, 16.8%; Streptococcus pyogenes, 12.3%; Moraxella catarrhalis, 9.5%; rhinovirus, 9.5%; and adenovirus, 3.4%. The overall rate of PCR-positive specimens for bacterial pathogens was 2.6 times higher, compared to culture results. The rate of PCR-positive results and the distribution of pathogens in the Nph were similar to those in the MEF. Nph PCR results had variable positive predictive values and high negative predictive values in predicting MEF findings. Our results indicate that Nph PCR could be a practical tool for examining respiratory pathogens in children with acute infections. PMID:26971180

  12. Interaction of pneumococcal phase variation and middle ear pressure/gas composition: An in vitro model of simulated otitis media (Ms. Ref. No.: YMPAT-D-08-00046)

    OpenAIRE

    Li-Korotky, Ha-Sheng; Banks, Juliane M.; Lo, Chia-Yee; Zeng, Fan-Rui; Stolz, Donna B.; Swarts, J. Douglas; Doyle, William J.

    2008-01-01

    Streptococcus pneumoniae, a leading cause of otitis media (OM), undergoes spontaneous intra-strain variations in colony morphology. Transparent (T) variant is more efficient in colonizing the nasopharynx while the opaque (O) variant exhibits greater virulence during systemic infections. We hypothesized that changes in middle ear (ME) gas pressure/composition during Eustachian tube (ET) dysfunction and the treatment of that dysfunction, e.g., tympanostomy tube (TT) insertion, play a role in se...

  13. CT中耳仿真内窥镜成像对中耳结构空间解剖关系的显示价值%Computed tomography virtual endoscopy imaging for spacial anatomy of the middle ear

    Institute of Scientific and Technical Information of China (English)

    杨智云; 刘春玲; 周旭辉; 严超贵; 谢红波; 彭谦

    2009-01-01

    CT仿真内窥镜耗时不长,可以临床常规使用.%BACKGROUND: The middle ear is a little aerated cavity with a complex anatomy and a deep location. Computed tomagraphy virtual endoscopy (CTVE) can be used to reconstruct the stereoscopic images of internal surface of hollow organs using spiral CT volumetric data, providing findings similar to fiberendoscope.OBJECTIVE: To vedfy the ability to show the normal middle ear and the clinical application of virtual endoscopy based on 64-detector CT data.DESIGN, TIME AND SETTING: A confirmatory controlled observation was performed at Department of Radiology, First Affiliated Hospital of Sun Yat-sen University between October 2005 and March 2006.PARTICIPANTS: A total of 33 patients (66 ears) with suspected middle ear disease who underwent spiral CT examination were included in this study. Among included ears, 35 were normal, and 31 were impaired, including 24 ears presenting with chronic suppurative otitis media (10 simple otitis media, 5 granulomatous otitis media, and 9 middle ear cholesteatoma), 2 ears with post-operative recurred suppurative otitis media, 2 ears with carcinoma of middle ear, and 2 ears with temporal bone fracture, and lear with foreign body granuloma.METHODS: CT images of the temporal bone were obtained using 0.5 mm thick axis slices with a soft reconstruction kemel at 0.3 mm intervals. Virtual endoscopic images of middle ear on CT were generated from volumetric data using the Navigator software. CTVE images were observed from multiple directions using the Fly Through software, and compared with the axial and coronal images and surgery findings.MAIN OUTCOME MEASURES: The following structures were observed: auditory ossicle and joints, superior, middle, and inferior tympanum, sinus tympani, external acoustic meatus, tympanum, facial recess, tegmental wall, anterior and superior ligaments of malleus, posterior ligament of incus, and retrotympanum.RESULTS: A series of images were acquired as the virtual

  14. Elephant ear

    Science.gov (United States)

    Elephant ear plants are indoor or outdoor plants with very large, arrow-shaped leaves. Poisoning may occur ... The harmful substances in elephant ear plants are: Oxalic acid Asparagine, a protein found in this plant Note: Leaves and stems are the most dangerous ...

  15. Ear Problems

    Science.gov (United States)

    ... this condition. Try an over-the-counter decongestant medicine for a few days. Putting a warm heating pad on your ear may help relieve the pain. If the pain is intense or doesn't go away in 1 or 2 days, see your doctor. No 9. Do you have tooth pain on the same side as the ear ...

  16. Discontinuity of the incudo-stapedial joint within a fully aerated middle ear and mastoid on computed tomography: A clinico-radiological study of its aetiology and clinical consequence

    International Nuclear Information System (INIS)

    Aim: To investigate the aetiology and clinical consequences of incudo-stapedial (IS) discontinuity when it is demonstrated on computed tomography (CT) within a fully aerated middle ear and mastoid. Methods and materials: Patients with CT evidence of IS discontinuity within a fully aerated middle ear and mastoid were prospectively identified. Clinical history, otoscopic findings, audiometry, and CT data were evaluated. Predefined criteria were used to determine the likely aetiology of IS discontinuity, whether it was diagnosed prior to the CT study, and the clinical consequences in terms of degree of conductive hearing loss and requirement for surgical correction. The range of CT appearances was evaluated. Results: The IS discontinuity in 34/36 ears was felt to be due to incus erosion secondary to chronic otitis, on the basis of clinical history and otoscopic findings. The IS discontinuity was rarely evident prior to CT with long-process deficiency being identified in only 5/36 cases. The mean air bone gap was only 22.5 dB. The ossicular defect was surgically addressed in only four cases. The incus deficiency was confined to the lower-third on CT in 19/36 cases. Conclusion: When IS discontinuity is demonstrated within a fully aerated middle ear and mastoid, the most likely aetiology is of acquired incus erosion due to chronic otitis media. The IS discontinuity on CT is usually not evident otoscopically. It usually results in only mild conductive hearing loss and the ossicular discontinuity was rarely surgically addressed in the present series.

  17. Pulmonary thromboembolism in cats.

    Science.gov (United States)

    Schermerhorn, Thomas; Pembleton-Corbett, Julie R; Kornreich, Bruce

    2004-01-01

    Pulmonary thromboembolism (PTE) is rarely diagnosed in cats, and the clinical features of the disease are not well known. PTE was diagnosed at postmortem examination in 17 cats, a prevalence of 0.06% over a 24-year period. The age of affected cats ranged from 10 months to 18 years, although young (10 years) cats were more commonly affected than were middle-aged cats. Males and females were equally affected. The majority of cats with PTE (n = 16) had concurrent disease, which was often severe. The most common diseases identified in association with PTE were neoplasia, anemia of unidentified cause, and pancreatitis. Cats with glomerulonephritis, encephalitis, pneumonia, heart disease, and hepatic lipidosis were also represented in this study. Most cats with PTE demonstrated dyspnea and respiratory distress before death or euthanasia, but PTE was not recognized ante mortem in any cat studied. In conclusion, PTE can affect cats of any age and is associated with a variety of systemic and inflammatory disorders. It is recommended that the same clinical criteria used to increase the suspicion of PTE in dogs should also be applied to cats. PMID:15320593

  18. Ear Infections in Children

    Science.gov (United States)

    ... Hearing, Ear Infections, and Deafness Ear Infections in Children On this page: What is an ear infection? ... their hearing. How can I tell if my child has an ear infection? Most ear infections happen ...

  19. Pro-inflammatory interleukins in middle ear effusions from atopic and non-atopic children with chronic otitis media with effusion.

    Science.gov (United States)

    Zielnik-Jurkiewicz, Beata; Stankiewicz-Szymczak, Wanda

    2016-06-01

    Chronic otitis media with effusion (OME) is associated with irreversible changes in the middle ear, sometimes leading to hearing loss and abnormal language development in children. While the pathogenesis of OME is not fully understood, inflammatory and allergic factors are thought to be involved. The study aimed to investigate the role of cytokines in the local development of chronic OME, and assess differences in the cytokine profiles between atopic and non-atopic children. 84 atopic and non-atopic children with chronic OME (mean age of 6 years 7 months) were studied. Age-matched children with hypertrophy of the adenoids and Eustachian tube dysfunction served as the control group. The number of past acute otitis media (AOM) episodes, their age, and the type of effusion were recorded for all children. Pro-inflammatory cytokine concentrations (TNF-α, IL-1β, IL-6 and IL-8) were determined and the presence of pathogenic bacteria in the patients' effusions was examined. High concentrations of TNF-α, IL-1β, IL-6 and IL-8 were found in the effusions in all children with chronic OME, with the highest levels observed in the non-atopic group. The atopic group showed persistently high IL-1β levels, while in the non-atopic children, IL-1β and TNF-α levels positively correlated with the patient's age and the number of past AOM episodes. Pathogenic bacteria were more frequently isolated from effusions in non-atopic children. In both atopic and non-atopic children, pro-inflammatory cytokines are found at high concentrations. This argues in favor of instituting anti-inflammatory management for treating OME, regardless of atopy. PMID:26078091

  20. Ear Injury

    Science.gov (United States)

    ... 2 Diabetes, Heart Disease a Dangerous Combo Are 'Workaholics' Prone to OCD, Anxiety? ALL NEWS > Resources First ... A blunt blow to the external ear can cause bruising between the cartilage and the layer of ...

  1. Membrana do biopolímero da cana-de-açúcar: avaliação experimental na orelha média Sugarcane biopolymer membrane: experimental evaluation in the middle ear

    Directory of Open Access Journals (Sweden)

    Débora Lopes Bunzen Mayer

    2011-02-01

    Full Text Available O desenvolvimento dos biomateriais é importante na cirurgia. O comportamento de uma nova membrana derivada da cana-de-açúcar será avaliado na orelha média do rato. OBJETIVOS: Analisar a interação da membrana do biopolímero da cana-de-açúcar na mucosa da orelha do rato. MATERIAL E MÉTODO: Estudo experimental, prospectivo e pareado com 24 ratos Wistar. A membrana do biopolímero da cana-de-açúcar foi inoculada na orelha média direita e a fáscia autóloga na orelha esquerda. Os ratos foram subdivididos em 3 grupos de 8 e sacrificados com 4, 8 e 12 semanas após a cirurgia. Foi realizada uma análise histológica da mucosa da orelha média e da membrana timpânica. RESULTADOS: Houve reação inflamatória no grupo experimental com exsudato subagudo em 50% dos casos e 30% exsudato crônico; 20% estava normal. A inflamação foi intensa inicialmente, mas diminuiu no decorrer do tempo. No grupo controle houve apenas um caso de exsudato. Miringoesclerose na membrana timpânica foi observada em ambos os grupos. A biomembrana foi absorvida tardiamente em comparação com a fáscia. CONCLUSÕES: A membrana do biopolímero da cana-de-açúcar causou reação inflamatória na orelha média, com regressão no tempo tardio do experimento e fibrose leve. Futuros estudos podem direcionar seu uso na otorrinolaringologia.New developments on biomaterials are important in surgery. The behavior of a new membrane produced from sugarcane will be evaluated in the middle ear of rats. AIM: This study analyzed the results from the interaction of the sugarcane-base biopolymer membrane in the middle ear of a rat. MATERIALS AND METHODS: We ran an experimental, prospective, paired study with 24 Wistar rats. The sugarcane-base polymer membrane was inoculated in the right ear; and an autologous fascia in the left ear. The rats were divided in 3 groups of 8, and slaughtered at 4, 8 and 12 weeks after surgery. Histological analyses were performed on the rats' middle

  2. Cosmetic ear surgery

    Science.gov (United States)

    Otoplasty; Ear pinning; Ear surgery - cosmetic; Ear reshaping; Pinnaplasty ... 31. Thorne CH. Otoplasty. In: Neligan PC, ed. Plastic Surgery . 3rd ed. Philadelphia, PA: Elsevier Saunders; 2013:chap ...

  3. Estudo comparativo de aspectos histológicos e imunohistoquímicos entre o colesteatoma espontâneo do meato acústico externo e o colesteatoma adquirido da orelha média Comparative study of the histological and immunohisochemical aspects of the spontaneous cholesteatomas of the external ear canal and the acquired cholesteatoma of the middle ear

    Directory of Open Access Journals (Sweden)

    Fernando de Andrade Quintanilha Ribeiro

    2004-10-01

    Full Text Available OBJETIVO: Neste trabalho foram avaliadas as características histológicas e imunohistoquímicas (Ki-67 e CK-16 do colesteatoma espontâneo do meato acústico externo comparando-as com as do colesteatoma adquirido da orelha média. FORMA DE ESTUDO: Caso controle. MATERIAL E MÉTODO: Fragmentos de colesteatoma do meato acústico externo foram submetidos a estudo histológico e imunohistoquímico com o intuito de verificar a expressão da CK16 e do antígeno nuclear Ki-67 nas células de sua matriz, e os resultados foram comparados com os encontrados no colesteatoma adquirido da orelha média. RESULTADOS: Os aspectos histológico e imunohistoquímico quanto à presença da CK16 e do antígeno nuclear Ki-67 na matriz do colesteatoma do meato acústico externo foram idênticos àqueles encontrados no colesteatoma adquirido da orelha média. DISCUSSÃO: Acreditamos que a ocorrência do colesteatoma do meato acústico externo seja devido ao comportamento anormal de células com potencial hiperproliferativo no epitélio do meato. Este potencial estaria relacionado com a presença da CK16 em uma região onde estes marcadores não são usualmente encontrados. Esta característica hiperproliferativa do colesteatoma do meato fica patente pela presença do antígeno nuclear Ki-67 nas células suprabasais de sua epiderme. Possivelmente esta doença deve ser desencadeada pela interação desta citoqueratina (CK16 com citocinas presentes no tecido conjuntivo subepitelial inflamado, como a TGF-µ. CONCLUSÃO: As características histológicas (presença de cones epiteliais e histoquímicas (expressão da CK16 e do antígeno nuclear KI-67 são idênticas no colesteatoma adquirido da orelha média e no colesteatoma espontâneo do meato acústico externo.AIM: A comparative analysis between the histological and the immuno histochemical (Ki-67 and CK-16 characteristics of spontaneous cholesteatomas of the external ear canal and acquired cholesteatomas of the middle

  4. Numerical analysis of ossicular chain lesion of human ear

    Institute of Scientific and Technical Information of China (English)

    Yingxi Liu; Sheng Li; Xiuzhen Sun

    2009-01-01

    Lesion of ossicular chain is a common ear disease impairing the sense of hearing. A comprehensive numerical model of human ear can provide better understanding of sound transmission. In this study, we propose a three-dimensional finite element model of human ear that incorporates the canal, tympanic membrane, ossicular bones,middle ear suspensory ligaments/muscles, middle ear cavity and inner ear fluid. Numerical analysis is conducted and employed to predict the effects of middle ear cavity, malleus handle defect, hypoplasia of the long process of incus,and stapedial crus defect on sound transmission. The present finite element model is shown to be reasonable in predicting the ossicular mechanics of human ear.

  5. Autoimmune Inner Ear Disease

    Science.gov (United States)

    ... Find an ENT Doctor Near You Autoimmune Inner Ear Disease Autoimmune Inner Ear Disease Patient Health Information ... with a hearing loss. How Does the Healthy Ear Work? The ear has three main parts: the ...

  6. How the Ear Works

    Science.gov (United States)

    ... Find an ENT Doctor Near You How the Ear Works How the Ear Works Patient Health Information News media interested in ... public relations staff at newsroom@entnet.org . The ear has three main parts: the outer ear (including ...

  7. Better Ear Health

    Science.gov (United States)

    ... Calendar Find an ENT Doctor Near You Better Ear Health Better Ear Health Patient Health Information News ... often helpful to those with this condition. Swimmer’s Ear An infection of the outer ear structures caused ...

  8. Simultaneous depth-resolved imaging of sub-nanometer scale ossicular vibrations and morphological features of the human-cadaver middle ear with spectral-domain phase-sensitive optical coherence tomography

    Science.gov (United States)

    Subhash, Hrebesh M.; Nguyen-Huynh, Anh; Wang, Ruikang K.; Jacques, Steven L.; Nuttall, Alfred L.

    2012-02-01

    We describe a novel method for the detection of the tiny motions of the middle ear (ME) ossicles and their morphological features with a spectral-domain phase sensitive optical coherence tomography (PS-OCT). Laser Doppler Vibrometry (LDV) and its variations are the most extensively used methods for studding the vibrational modes of the ME. However, most techniques are limited to single point analysis methods, and do not have the ability to provide depth resolved simultaneous imaging of multiple points on the ossicles especially with the intact eardrum. Consequently, the methods have the limited ability to provide relative vibration information at these points. In this study, we demonstrated the feasibility of using PS-OCT for simultaneous depth resolved imaging of both vibration information and morphological features in a cadaver human middle ear with high sensitivity and resolution. This technique has the potential to provide meaningful vibration of ossicles with a vibration sensitivity of ~0.5nm at 1kHz acoustic stimulation. To the best of our knowledge, this is the first demonstration of depth-resolved vibration imaging of ossicles with a PS-OCT system at sub-nanometer scale.

  9. TNF-R2 expression in acquired middle ear cholesteatoma Expressão do TNF-R2 no colesteatoma adquirido da orelha média

    Directory of Open Access Journals (Sweden)

    Rodrigo Faller Vitale

    2011-08-01

    Full Text Available Acquired middle ear cholesteatoma is a disease which promotes bone erosion resulting in potentially serious complications. The tumor necrosis factor alpha (TNF-α is present in cholesteatoma and it is related to bone erosion, as shown by different authors. To understand the aggressiveness characteristics of cholesteatoma is necessary, however, to better address the presence and distribution of their receptors. OBJECTIVE: To evaluate the expression of type 2 TNF-α receptor (TNF-R2 in fragments of cholesteatoma and correlate it to the degree of inflammation present. MATERIAL AND METHODS: observational cross-sectional study, which analyzed 33 fragments of cholesteatomas through histological analysis and immunohistochemistry (using as primary antibody to TNF-R2 LabVision® brand. The evaluation was performed by means of a qualitative and semi-quantitative agreement with the observed intensity. For statistical analysis we used the Fisher exact test and Spearman´s correlation coefficient (considered statistically significant when p O colesteatoma adquirido da orelha média promove erosão óssea, ocasionando complicações potencialmente graves. O fator de necrose tumoral alfa (TNF-α está presente no colesteatoma adquirido da orelha média e relaciona-se com a erosão óssea, como demonstraram diferentes autores. Para que se compreenda as características de agressividade do colesteatoma, é necessário que se estude a presença e a distribuição seus receptores. OBJETIVO: Avaliar a expressão do receptor tipo dois do TNF-α (TNF-R2 em fragmentos de colesteatoma e relacioná-lo com o grau de inflamação. MATERIAL E MÉTODOS: Estudo observacional do tipo transversal. Foram analisados 33 fragmentos de colesteatomas, submetidos à análise histológica e imunoistoquímica (utilizando o TNF-R2 da marca Labvision®. A avaliação foi realizada de forma qualitativa e semiquantitativa, de acordo com a intensidade observada. Para a análise estat

  10. 14 CFR 67.305 - Ear, nose, throat, and equilibrium.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Ear, nose, throat, and equilibrium. 67.305..., nose, throat, and equilibrium. Ear, nose, throat, and equilibrium standards for a third-class airman...) 35 50 50 60 (b) No disease or condition of the middle or internal ear, nose, oral cavity, pharynx,...

  11. 14 CFR 67.205 - Ear, nose, throat, and equilibrium.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Ear, nose, throat, and equilibrium. 67.205..., nose, throat, and equilibrium. Ear, nose, throat, and equilibrium standards for a second-class airman...) 35 50 50 60 (b) No disease or condition of the middle or internal ear, nose, oral cavity, pharynx,...

  12. Pathogenesis of otitis externa and otitis media in dogs and cats

    Directory of Open Access Journals (Sweden)

    Popović Nikola

    2005-01-01

    Full Text Available Diseases of the outer and middle ear (Otitis externa and Otitis media are a frequent clinical problem which is mostly approached in the wrong way. We believe that the approach to a diseased ear in dogs or cats by practicing veterinarians in our country is most often incorrect. Namely, the conventional approach to inflammation of the outer ear is narrowed down to cleaning the ear, usually with cotton wool and hydrogen peroxide, and then by applying ear drops for veterinary or human use over the next few days. A somewhat more conscientious approach implies treatment using antibiotics, topical and/or systemic, but based on an antibiogram. If the presence of a foreign body is suspected, the veterinarian will use an otoscope, and this is where the entire diagnostic approach in our conditions usually ends. Such procedures most often fail to resolve the problem, so that the disease recurs after a certain time or becomes chronic recurrent Otitis externa, which is one of the biggest problems in dog dermatology. Experience shows that veterinarians here are generally not familiar with the pathogenesis of outer and middle ear infection, and that this is the reason why they approach diagnostics and therapy in the wrong way. The most important thing is to have in mind that bacteria and fungi linked with a pathological process in the ear canal are merely opportunistic microorganisms, and never primary pathogens, themselves responsible for Otitis externa. Antibiotic or antimycotic treatment does not cure the basic disease which led to the inflammation, but only its consequences. A large number of factors involved in the inflammation of the outer or middle ear are traditionally divided into primary, predisposing, secondary, and underlying. The basis for the successful treatment of Otitis externa and Otitis media is the recognition, elimination or control of the primary factors (atopy, nutritive allergy, keratinization disorders, parasitic infestations. The

  13. Análise dos padrões histopatológicos do colesteatoma adquirido da orelha média Analysis of histopathological aspects in acquired middle ear cholesteatoma

    Directory of Open Access Journals (Sweden)

    Adriana Leal Alves

    2008-12-01

    Full Text Available O colesteatoma da orelha média é caracterizado pela presença de epitélio estratificado pavimentoso queratinizado neste local, com alto poder invasivo, causando destruição óssea e podendo levar a complicações. OBJETIVO: Estudar os padrões histopatológicos no colesteatoma adquirido da orelha média. Correlacionar esses dados com a idade do paciente. FORMA DE ESTUDO: Clínico e experimental do tipo transversal. MATERIAL E MÉTODO: Foram colhidas amostras de colesteatoma de 50 pacientes submetidos à cirurgia otológica, sendo 34 adultos e 16 crianças, no período de 2006 a 2007. Essas amostras foram submetidas à análise histológica. RESULTADOS: A presença de atrofia foi encontrada em 78% dos casos, acantose em 88%, hiperplasia da camada basal em 88% e cones epiteliais em 62%. As correlações entre acantose e hiperplasia da camada basal, acantose e formação de cones epiteliais, hiperplasia da camada basal foram positivas e significativas. Não houve diferença estatisticamente significativa em relação aos padrões histopatológicos entre os dois grupos etários (p>0,05. CONCLUSÃO: O colesteatoma tem características hiperproliferativas, com acantose, hiperplasia da camada basal e presença de cones epiteliais na sua matriz.Middle ear cholesteatomas are characterized by the presence of stratified squamous epithelium in this cavity with highly invasive properties causing bone destruction and it may lead to complications. AIM: To study the histopathological features in acquired cholesteatomas of the middle ear, correlating this data with patient age. Study design:clinical and experimental cross-sectional study. MATERIAL AND METHODS: Samples were obtained from 50 patients submitted to otologic surgery for the removal of middle ear cholesteatomas from 2006 to 2007. Thirty four patients were adults and 16 were children. Samples were studied by histological analysis. RESULTS: we found the presence of epithelial atrophy (78

  14. Travel Inside the Ear

    Science.gov (United States)

    ... Home » Health Info » Hearing, Ear Infections, and Deafness Travel Inside the Ear Video When sound waves reach ... are smaller than an orange seed. It then travels into the inner ear, which is filled with ...

  15. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Home » Health Info » Hearing, Ear Infections, and Deafness Travel Inside the Ear Video When sound waves reach ... are smaller than an orange seed. It then travels into the inner ear, which is filled with ...

  16. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Ear Infections, and Deafness Travel Inside the Ear Video When sound waves reach your ear, you know ... Topics How Do We Hear? What is Sound? Video Have a question? Information specialists can answer your ...

  17. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Menu Home Health Info Hearing, Ear Infections, and Deafness Balance Taste and Smell Voice, Speech, and Language ... here Home » Health Info » Hearing, Ear Infections, and Deafness Travel Inside the Ear Video When sound waves ...

  18. Ear Disorders in Scuba Divers

    Directory of Open Access Journals (Sweden)

    MH Azizi

    2010-12-01

    Full Text Available History of underwater diving dates back to antiquity. Breath-hold technique in diving was known to the ancient nations. However, deep diving progressed only in the early decades of the 19th century as the result of advancements in efficient underwater technologies which subsequently led to invention of sophisticated sets of scuba diving in the 20th century. Currently, diving is performed for various purposes including commercial, recreational, military, underwater construction, oil industry, underwater archeology and scientific assessment of marine life. By increasing popularity of underwater diving, dive-related medical conditions gradually became more evident and created a new challenge for the health care professionals, so that eventually, a specialty the so-called “diving medicine” was established. Most of the diving-associated disorders appear in the head and neck. The most common of all occupational disorders associated with diving are otologic diseases. External otitis has been reported as the most common otolaryngologic problem in underwater divers. Exostosis of the external ear canal may be formed in divers as the result of prolonged diving in cold waters. Other disorders of the ear and paranasal sinuses in underwater divers are caused by barometric pressure change (i.e., barotraumas, and to a lesser extent by decompression sickness. Barotrauma of the middle ear is the most prevalent barotrauma in divers. The inner ear barotraumas, though important, is less common. The present paper is a brief overview of diving-related ear disorders particularly in scuba divers.

  19. MICRODISSECTION OF MINIATURE PIG EAR

    Institute of Scientific and Technical Information of China (English)

    YI Haijin; GuoWeiwei; Chen Lei; Wu Na; Li Jiana; Ren Lili; Yang Shiming

    2013-01-01

    Objective To investigate the suitability of miniature pigs as an animal model for otological research. Methods Microdissection of the temporal bone was performed on 10 miniature pigs and recorded on photo-graphs. Results The morphology and measurement of the external, middle and inner ear and the lateral re-cess of the miniature pigs were obtained by microdissection. Conclusion Compared to traditional animal models, the miniature pig may be a better model for biomedical research because of its many similarities in physiological functions with humans. Similarities of the temporal bone structures, including the external, middle and inner ear and the lateral recess, between the miniature pig and human make the animal a poten-tially useful model for otological research.

  20. Chronic discharging ear in a child: are we missing something?

    Science.gov (United States)

    Dutta, Mainak; Ghatak, Soumya; Biswas, Gautam

    2013-08-01

    Chronic discharging ear, mostly due to middle or external ear infection, is one of the leading causes for seeking healthcare among the paediatric population in a developing country. However, a long-standing forgotten middle ear foreign body forms a rare cause for such presentation demanding a high index of suspicion from the clinicians. Most of them are iatrogenic or accidental, and are removed by conventional permeatal approach; need for tympanotomy is rarely documented in the recent literature. We report the first case where a large stone was introduced into the middle ear through a pre-existing tympanic membrane perforation by the child himself, and only the second documentation of removal of a middle ear foreign body by tympanotomy in a child. PMID:24145273

  1. Play it by Ear

    DEFF Research Database (Denmark)

    Kammersgaard, Nikolaj Peter Iversen; Kvist, Søren Helstrup; Thaysen, Jesper;

    2014-01-01

    The first antenna for ear-to-ear communication with a standard Bluetooth chip has the potential to improve hearing aid technology.......The first antenna for ear-to-ear communication with a standard Bluetooth chip has the potential to improve hearing aid technology....

  2. Swimmer's Ear (For Parents)

    Science.gov (United States)

    ... for Your Child All About Food Allergies Swimmer's Ear (Otitis Externa) KidsHealth > For Parents > Swimmer's Ear (Otitis ... español Otitis del nadador (otitis externa) About Swimmer's Ear Otitis externa (OE) — commonly known as swimmer's ear — ...

  3. Swimmer's Ear (External Otitis)

    Science.gov (United States)

    ... Can I Help a Friend Who Cuts? Swimmer's Ear (External Otitis) KidsHealth > For Teens > Swimmer's Ear (External Otitis) Print A A A Text Size ... Ryan awoke with a sharp pain in his ear — it really hurt! He remembered having ear infections ...

  4. Ear cleaning: the UK and US perspective.

    Science.gov (United States)

    Nuttall, Tim; Cole, Lynette K

    2004-04-01

    Ear cleaning helps maintain the normal otic environment and is important in the treatment of otitis. Over cleaning, however, may trigger otitis through maceration of the epidermal lining. Simple manual cleaning is useful for routine cleansing but doesn't remove tightly adherent debris. Bulb syringes are more vigorous but may damage the ear in inexperienced hands. Devices using mains water pressure or dental machines are also available. Thorough cleaning of the ear canals and middle ear cavity can only be achieved by retrograde flushing using specially adapted catheters, feeding tubes or video otoscopes under anaesthesia. Myringotomy, inspection and cleaning of the middle should be performed if the tympanic membrane appears abnormal. There are a wide variety of cleaning fluids available. Ceruminolytics soften and dissolve cerumen to facilitate cleaning. Surfactants emulsify debris, breaking it up and keeping it in solution. Astringents dry the ear canal surface, preventing maceration. Maintaining a low pH and incorporating antimicrobial agents can inhibit microbial proliferation and glucocorticoids can be used to reduce inflammation. Adverse effects and contraindications following ear cleaning can include maceration, contact reactions, otitis media, ear canal avulsion, vestibular syndrome, Horner's syndrome, facial nerve paralysis and deafness. Care should be exercised in selecting cleaning fluids if the tympanic membranes are ruptured. PMID:15030561

  5. Experimental cochlear hydrops in cats.

    Science.gov (United States)

    Eby, T L

    1986-11-01

    An experimental model of cochlear hydrops was created in cats. Ten cats underwent surgical procedures to obliterate the saccule, and their temporal bones were studied by light microscopy after sacrifice at 10 weeks. In one group the saccules were destroyed by maceration and aspiration. However, in these ears the saccular lumens were not obliterated and endolymphatic hydrops did not develop. Obliteration of the saccules was achieved in the second group after fascia was introduced into the area of the injured saccules. Cochlear endolymphatic hydrops was a consistent finding in these ears except when a fistula of the membranous labyrinth was present. However, in addition to fibrosis and new bone formation in the vestibules there were also degenerative changes in the hair cells, tectorial membranes, and striae vasculares of these cochleae. The results supported the longitudinal flow theory of endolymph and are consistent with the reported examples of cochlear endolymphatic hydrops in man. PMID:3812642

  6. An abbreviated history of the ear: from Renaissance to present.

    OpenAIRE

    Hachmeister, Jorge E.

    2003-01-01

    In this article we discuss important discoveries in relation to the anatomy and physiology of the ear from Renaissance to present. Before the Renaissance, there was a paucity of knowledge of the anatomy of the ear, because of the relative inaccessibility of the temporal bone and the general perception that human dissections should not be conducted. It was not until the sixteenth century that the middle ear was described with detail. Further progress would be made between the sixteenth and eig...

  7. Precise individualized armature for ear reconstruction

    Science.gov (United States)

    Evenhouse, Raymond J.; Chen, Xiaoming

    1991-04-01

    The cosmetic result of an ear restored surgically or via prosthetics is dependent on the surgeon''s ability to carve a precise cartilage armature at the time of surgery or the prosthetist''s ability to sculpt in wax an exact duplicate of the patient''s " missing" ear. Introducing CAD/CAM technology into the process benefits the esthetic outcome of these procedures. By utilizing serial section information derived from CAT MRI or moulage techniques a mirrorimage of the patient''s " donor" ear is generated. The resulting earform data is then used for the design of a cartilage armature produced by multi-axis milling or to produce by stereolithography a model which serves as the basis for a prosthesis.

  8. Ear Plastic Surgery

    Science.gov (United States)

    ... receive light-weight earrings. Does Insurance Pay for Cosmetic Ear Surgery? Insurance usually does not cover surgery solely for ... republication strictly prohibited without prior written permission. Ears Cosmetic Surgery, Facelift, Rhinoplasty, Blepharoplasty ... Get Involved Professional Development Practice ...

  9. Ear Infection and Vaccines

    Science.gov (United States)

    ... an ENT Doctor Near You Ear Infection and Vaccines Ear Infection and Vaccines Patient Health Information News ... or may need reinsertion over time. What about vaccines? A vaccine is a preparation administered to stimulate ...

  10. 3D visualisation of the middle ear and adjacent structures using reconstructed multi-slice CT datasets, correlating 3D images and virtual endoscopy to the 2D cross-sectional images

    International Nuclear Information System (INIS)

    The 3D imaging of the middle ear facilitates better understanding of the patient's anatomy. Cross-sectional slices, however, often allow a more accurate evaluation of anatomical structures, as some detail may be lost through post-processing. In order to demonstrate the advantages of combining both approaches, we performed computed tomography (CT) imaging in two normal and 15 different pathological cases, and the 3D models were correlated to the cross-sectional CT slices. Reconstructed CT datasets were acquired by multi-slice CT. Post-processing was performed using the in-house software ''3D Slicer'', applying thresholding and manual segmentation. 3D models of the individual anatomical structures were generated and displayed in different colours. The display of relevant anatomical and pathological structures was evaluated in the greyscale 2D slices, 3D images, and the 2D slices showing the segmented 2D anatomy in different colours for each structure. Correlating 2D slices to the 3D models and virtual endoscopy helps to combine the advantages of each method. As generating 3D models can be extremely time-consuming, this approach can be a clinically applicable way of gaining a 3D understanding of the patient's anatomy by using models as a reference. Furthermore, it can help radiologists and otolaryngologists evaluating the 2D slices by adding the correct 3D information that would otherwise have to be mentally integrated. The method can be applied to radiological diagnosis, surgical planning, and especially, to teaching. (orig.)

  11. Application of Vibrant Soundbridge (VSB)in patients with congenital deformation of middle and outer ears%振动声桥在先天性中外耳畸形患者的应用

    Institute of Scientific and Technical Information of China (English)

    邹艺辉; 李佳楠; 陈爱婷; 戴朴; 韩东一; 刘会占; 杨仕明

    2012-01-01

    Objective To report application of the Vibrant Soundbridge (VSB) in patients with congenital deformation of the middle and outer ears and investigate its indications for this patient population. Method Four patients with congenital deformation of middle and outer ears underwent VSB implantation. All were male (aged 3-18 years, average 13.5 years) and operated on the left side., Malformation was bilateral in 3 patients and unilateral in 1 patient. Surgical techniques were modified to accommodate each patient' s unique conditions. The middle ear space was approached via the facial recess in 3 patients and through a post-facial nerve route in 1 patient. The VSB implant was connected to either the stapes (2 cases) or the round window (2 cases). Pure tone and speech audiometry results and daily communication before and after VSB activation were compared. Results The operations were successful in all patients, with no complications. The patient communication level improved significantly after VSB activation. Average air conduction pure tone threshold or conditioned reflex audiometry improved by 35dB in the 0.25-4 kHz range from 69 dB HL before VSB activation to 34 dB HL after. In quiet, the sentence recognition rate at 65 dB SPL went up to 86% from 0% without VSB for patients with bilateral deformation and remained at 100% for the patient with unilateral deformity. However, for the latter patient, the rate improved to 20% from 0% without VSB in noise (-8 dB SNR). Conclusion VSB is a good solution for improving hearing in patients with congenital deformation of middle and outer ears. Operation can be completed and good results can be achieved even in patients with unique conditions.%目的 报道振动声桥在先天性中外耳畸形患者(尤其有特殊情况者)的应用,探索其在该类患者的适应症.方法 对4例先天性中外耳畸形患者行振动声桥植入术,均为男性,年龄3-18岁(平均13.5岁),3例双耳畸形,1例单耳畸形,均为左侧植

  12. Cat Scan

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正> A man takes his motionless dog to the vet."Doc,I think my dog is dead.”The vet looks the dog over, goes into a backroom,and comes out with a cat.He places the caton the table next to the dog.The cat walks aroundand sniffs at the dog.The dog does not move.The

  13. High Intensity Pressure Noise Transmission in Human Ear: A Three Dimensional Simulation Study

    Science.gov (United States)

    Hawa, Takumi; Gan, Rong; Leckness, Kegan

    2015-03-01

    High intensity pressure noise generated by explosions and jet engines causes auditory damage and hearing loss of the military service personals, which are the most common disabilities in the veterans. Authors have investigated the high intensity pressure noise transmission from the ear canal to middle ear cavity. A fluid-structure interaction with a viscoelastic model for the tympanic membrane (TM) as well as the ossicular chain has been considered in the study. For the high intensity pressure simulation the geometry of the ear was based on a 3D finite element (FE) model of the human ear reported by Gan et al. (Ann Biomed Eng 2004). The model consists of the ear canal, TM, ossicular chain, and the middle ear cavity. The numerical approach includes two steps: 1) FE based finite-volume method simulation to compute pressure distributions in the ear canal and the middle ear cavity using CFX; and 2) FE modeling of TM and middle ear ossicles in response to high intensity sound using multi-physics analysis in ANSYS. The simulations provide the displacement of the TM/ossicular chain and the pressure fields in the ear canal and the middle ear cavity. These results are compared with human temporal bone experimental data obtained in our group. This work was supported by DOD W81XWH-14-1-0228.

  14. Secreção na orelha média em lactentes - ocorrência, recorrência e aspectos relacionados Secretion of middle ear in infants - occurrence, recurrence and related factors

    Directory of Open Access Journals (Sweden)

    Sandra de O. Saes

    2005-04-01

    Full Text Available OBJETIVO: O presente estudo objetivou avaliar a ocorrência e recorrência de secreção na orelha média e os possíveis fatores associados, em 190 recém-nascidos e lactentes observados nos 2 primeiros anos de vida, participantes de um programa de prevenção, detecção e intervenção interdisciplinar desenvolvido na Clínica de Educação para Saúde da Universidade do Sagrado Coração. MÉTODOS: Os recém-nascidos e lactentes foram submetidos mensalmente a anamnese, otoscopia, avaliação audiológica comportamental por meio de instrumentos sonoros e tons puros (audiometria pediátrica e timpanometria. RESULTADOS: Os resultados revelaram que 68,4% dos lactentes apresentaram um ou mais episódios de secreção na orelha média nos 2 primeiros anos, com maior recorrência para o sexo masculino. A idade de maior ocorrência foi entre 4 e 12 meses. Quanto mais cedo ocorreu o primeiro episódio, maior foi a probabilidade de recorrência. Os meses do ano de maior incidência foram de maio a agosto. Das variáveis estudadas, constatou-se que o período de aleitamento materno exclusivo atuou como um fator protetor. Quanto aos fatores de risco, verificou-se que a presença tabagismo passivo, refluxo gastroesofágico, alergia respiratória esteve relacionada à recorrência de efusão. CONCLUSÃO: Os achados revelaram a importância do acompanhamento auditivo periódico para lactentes nos 2 primeiros anos de vida, considerando ser o período crítico para o processo de maturação do sistema auditivo, no qual privações sensoriais auditivas podem ser responsáveis por seqüelas para o desenvolvimento de fala e linguagem.OBJECTIVE: The present study aimed at evaluating the occurrence and recurrence of middle ear secretion and possible associated factors in the first two years of life of 190 newborns and infants, participants in the interdisciplinary prevention, detection, and intervention program at the Clínica de Educação para Saúde of

  15. A RARE FOREIGN BODY IN THE EAR: REMOVED BY CANALOPLASTY: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Shankar

    2015-08-01

    Full Text Available Getting an object impact in the ear canal is a relatively common problem in children, the majority of items are lodged in the external auditory canal which is the small channel that ends at the ear drum. The children often place these items in their ears out of curiosity. Common objects found in ear include beads, toys, food material, insects and seeds etc. usually foreign body ear are removed by syringing or with Hartmann’s forceps, we are here presenting a case of foreign body in the middle ear removed by canaloplasty through post - aural approach.

  16. O papel das citocinas no colesteatoma adquirido da orelha média: revisão da literatura The role of cytokines in acquired middle ear cholesteatoma: literature review

    Directory of Open Access Journals (Sweden)

    Adriana Leal Alves

    2004-12-01

    Full Text Available Este estudo visa a analisar de modo crítico a literatura pertinente a respeito do papel das citocinas no colesteatoma adquirido. O colesteatoma da orelha média é caracterizado pela presença de epitélio escamoso estratificado queratinizado neste local, com alto poder invasivo, causando destruição óssea e podendo levar a complicações. As citocinas são glicoproteínas de baixo peso molecular que atuam na intercomunicação celular. São importantes na estimulação e supressão dos eventos da resposta imune, desencadeando e coordenando a resposta inflamatória, assim como os processos de cicatrização e remodelação tecidual. No colesteatoma já foram observadas as seguintes citocinas e fatores de crescimento: IL-1, IL-6, IL-8, TNF-±, TGF- ±,TGF-², EGF e KGF. Ocorre um sinergismo entre as diferentes citocinas para resultar nas características agressivas do colesteatoma.The present study conducted a critical analysis of the literature regarding the role of cytokines in acquired cholesteatomas. Middle ear cholesteatomas are characterized by the presence of stratified squamous epithelium in this cavity revealing highly invasive properties evolving bone destruction and subsequent complications. Cytokines are low molecular weight-glycoproteins able to act in cellular intercommunication. They are important to stimulation and suppression of immune response-related events, triggering and coordinating inflammatory response, as well as wound healing and tissue remodeling. In cholesteatoma, reported cytokines and growth factors were as follows: IL-1, IL-6, IL-8, TNF-a, TGF-alpha, TGF-beta, EGF and KGF. A synergism among different cytokines should occur to generate the aggressive characteristics of cholesteatoma.

  17. The Analysis of the Main Pathogenic Bacteria and Drug Sensitivity in Patients with Chronic Suppurative Otitis Media and Patients with Middle Ear Cholesteatoma in Xinjiang%新疆地区慢性化脓性中耳炎及中耳胆脂瘤病原菌及药敏分析

    Institute of Scientific and Technical Information of China (English)

    顾兴智; 牛良军; 尤乐都斯·克尤木; 张华

    2014-01-01

    Objective To study the main pathogenic bacteria and drug sensitivity in patients with chronic sup-purative otitis media and patients with middle ear cholesteatoma in Xinjiang ,and to provide evidence for reasonable u-sing antibiotics for the two diseases .Methods We performed a retrospective analysis of the middle ear secretion bac-terial culture results of 409 patients with chronic suppurative otitis media and middle ear cholesteatoma at our hospi-tal from January 2008 to December 2013 .Results ①There were 361 strains of microbes isolated from 409 patients , and 16 of them were fungi ,and 245 were bacteria .There was a statistical significance of the pathogen detection rate about G+ and G- bacteria between chronic suppurative otitis media and middle ear cholesteatoma (χ2 =12 .216 ,P=0 .000) .②Staphylococcus aureus(in 78 of 254 ears ,30 .7% ) ,pseudomonas aeruginosa(in 46 of 254 ears ,18 .1% ) , coagulase-negative staphylococcus(in 42 of 254 ears ,16 .5% ) ,and proteus mirabilis(in 20 of 254 ears ,7 .87% ) were the most frequently insolated pathogens in chronic suppurative otitis media ,while staphylococcus aureus(in 26 of 107 ears ,24 .30% ) ,pseudomonas aeruginosa(in 17 of 107 ears ,15 .9% ) ,coagulase-negative staphylococcus (in 16 of 107 ears ,15 .0% ) ,and proteus mirabilis(in 14 of 107 ears ,13 .1% ) were the most frequently insolated patho-gens in middle ear cholesteatoma .③Staphylococcus aureus and coagulase -negative staphylococcus were all sensi-tive to quinoline nupu ting /dalfopristin ,teicoplanin ,vancomycin ,and moxifloxacin .The sensitivity of coagulase -negative staphylococcus to gentamicin ,trimethoprim -sulfamethoxazole ,and erythromycin in the middle ear chol-esteatoma were higher than those of in chronic suppurative otitis media .The sensitivity of pseudomonas aeruginosa to ceftazidime ,and imipenem were lower in the middle ear cholesteatoma .The drug sensitivity of pseudomonas aeruginosa ,proteus to trimethoprim/sulfamethoxazole and

  18. Cat scratch disease (image)

    Science.gov (United States)

    Cat scratch disease is an infectious illness associated with cat scratches, bites, or exposure to cat saliva, causing chronic swelling of the lymph nodes. Cat scratch disease is possibly the most common cause of ...

  19. Epidemiology, genetic divergence and acaricides of Otodectes cynotis in cats and dogs

    OpenAIRE

    Fayez Awadalla Salib and Taher Ahamed Baraka

    2011-01-01

    Otodectes cynotis mite is a common parasite of cats and dogs, survives in the ear canal and causes otitis externa, itching and severe complications. The microscopic examination of ear swabs, skin scraps and faecal samples of 289 cats and 223 dogs revealed that mono-specific and mixed infestations of Otodectes cynotis in cats were (24.56%) and(6.57%) while in dogs were (7.17%) and (4.48%) respectively. The highest rate of infestation was in young cats and the lowest was in elder dogs. The mixe...

  20. Cat's Claw

    Science.gov (United States)

    ... R S T U V W X Y Z Cat's Claw Share: On This Page Introduction What the ... More Information Key References © Steven Foster Common Names: cat’s claw, uña de gato Latin Name: Uncaria tomentosa, ...

  1. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Search form Search A–Z Index Español Menu Home Health Info Hearing, Ear Infections, and Deafness Balance ... Committees Contact Us Get Involved You are here Home » Health Info » Hearing, Ear Infections, and Deafness Travel ...

  2. Natural ear rings

    OpenAIRE

    Sabaretnam, Mayilvaganan; Virupakshaiah, Akash; Baruah, Rishiraj

    2015-01-01

    Key Clinical Message Ear lobe keloids are common following ear piercing and these lesions are conspicuous and cosmetically unappealing. Multiple methods including surgery, radiotherapy, anti mitotic agents, silicone sheet, pressure clips, and cryotherapy have been used. The Challenge is to have a good cosmetic outcome with minimal recurrence.

  3. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Deafness Travel Inside the Ear Video When sound waves reach your ear, you know you've heard ... the sound through the hair cells to your brain. Last Updated Date: July 30, 2014 Languages Español ...

  4. A Catalogue of Anatomical Fugitive Sheets: Cat. 49-62

    OpenAIRE

    1999-01-01

    Images Cat. 50 Cat. 51 Cat. 53 Cat. 54 Cat. 55 (a) Cat. 55 (b) Cat. 56 Cat. 57: 1 Cat. 57: 2 Cat. 57: 3 Cat. 57: 4 Cat. 59: 1 Cat. 59: 2 Cat. 59: 3 Cat. 59: 4 Cat. 60 Cat. 61 Cat. 62: 1 (a) Cat. 62: 1 (b) Cat. 62: 2 (a) Cat. 62: 2 (b)

  5. A Catalogue of Anatomical Fugitive Sheets: Cat. 26-48

    OpenAIRE

    1999-01-01

    Images Cat. 26: 1 (a) Cat. 26: 1 (b) Cat. 26: 2 (a) Cat. 26: 2(b) Cat. 27: 1 (a) Cat. 27: 1 (b) Cat. 27: 2 (a) Cat. 27: 2 (b) Cat. 28 Cat. 29: 2 (a) Cat. 29: 2 (b) Cat. 30: 1 Cat. 30: 2 Cat. 30: 3 Cat. 33 Cat. 34: 1 Cat. 34: 2 Cat. 35: 1 Cat. 35: 2 Cat. 35: 3 Cat. 36 Cat. 37 Cat. 38: 1 Cat. 38: 2 Cat. 40 Cat. 42 Cat. 43 Cat. 44 Cat. 45: 1 Cat. 45: 2 Cat. 46 Cat. 47: 1 Cat. 47: 2 Cat. 47: 3 Cat. 48: 1 Cat. 48: 2 Cat. 48: 3

  6. Primary hypoadrenocorticism in ten cats.

    Science.gov (United States)

    Peterson, M E; Greco, D S; Orth, D N

    1989-01-01

    Primary hypoadrenocorticism was diagnosed in ten young to middle-aged cats of mixed breeding. Five of the cats were male, and five were female. Historic signs included lethargy (n = 10), anorexia (n = 10), weight loss (n = 9), vomiting (n = 4), and polyuria (n = 3). Dehydration (n = 9), hypothermia (n = 8), prolonged capillary refill time (n = 5), weak pulse (n = 5), collapse (n = 3), and sinus bradycardia (n = 2) were found on physical examination. Results of initial laboratory tests revealed anemia (n = 3), absolute lymphocytosis (n = 2), absolute eosinophilia (n = 1), and azotemia and hyperphosphatemia (n = 10). Serum electrolyte changes included hyponatremia (n = 10), hyperkalemia (n = 9), hypochloremia (n = 9), and hypercalcemia (n = 1). The diagnosis of primary adrenocortical insufficiency was established on the basis of results of adrenocorticotropic hormone (ACTH) stimulation tests (n = 10) and endogenous plasma ACTH determinations (n = 7). Initial therapy for hypoadrenocorticism included intravenous administration of 0.9% saline and dexamethasone and intramuscular administration of desoxycorticosterone acetate in oil. Three cats were euthanatized shortly after diagnosis because of poor clinical response. Results of necropsy examination were unremarkable except for complete destruction of both adrenal cortices. Seven cats were treated chronically with oral prednisone or intramuscular methylprednisolone acetate for glucocorticoid supplementation and with oral fludrocortisone acetate or intramuscular injections of repository desoxycorticosterone pivalate for mineralocorticoid replacement. One cat died after 47 days of therapy from unknown causes; the other six cats are still alive and well after 3 to 70 months of treatment. PMID:2469793

  7. Dynamics of Streptococcus pneumoniae serotypes causing acute otitis media isolated from children with spontaneous middle-ear drainage over a 12-year period (1999-2010 in a region of northern Spain.

    Directory of Open Access Journals (Sweden)

    Marta Alonso

    Full Text Available The aim of this study was to determine the serotype and clonal distribution of pneumococci causing acute otitis media (AOM and their relationship with recurrences and mixed infections with other microorganisms under the influence of the 7-valent pneumococcal conjugate vaccine (PCV7. To do this, all pneumococcal isolates collected from the spontaneous middle-ear drainage of children <5 years old diagnosed of AOM by their pediatrician or their general practitioner from 1999 to 2010 were phenotypically characterized and the most frequent serotypes were genotyped. In the 12-year study, 818 episodes of pneumococcal AOM were detected, mostly (70.5% in children younger than 2 years old. In 262 episodes (32%, the pneumococci were isolated with another bacterium, mainly (n=214 Haemophilus influenzae. Mixed infections were similar in children under or over 2 years old. The most frequent serotypes were 19A (n=227, 27.8%, 3 (n=92, 11.2% and 19F (n=74, 9%. Serotypes included in the PCV7 sharply decreased from 62.4% in the pre-vaccination (1999-2001 to 2.2% in the late post-vaccination period (2008-2010. Serotype diversity steadily increased after the introduction of the PCV7 but decreased from 2008-2010 due to the predominant role of serotype 19A isolates, mostly ST276 and ST320. The prevalence of serotype 3 doubled from 6.1% (20/326 in 1999-2004 to 14.6% (72/492 in 2005-2010. Relapses mainly occurred in male infants infected with isolates with diminished antimicrobial susceptibility. Reinfections caused by isolates with the same serotype but different genotype were frequent, highlighting the need for genetic studies to differentiate among similar strains. In conclusion, the main change in pneumococcal AOM observed after the introduction of the PCV7 was the sharp decrease in vaccine serotypes. Also notable was the high burden of serotype 19A in total pneumococcal AOM before and especially after the introduction of the PCV7, as well as in relapses and

  8. CT of temporal bone - IV. inner ear

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Jae Yoon; Sung, Kyu Bo; Youn, Eun Kyoung; Park, Youn Kyeung; Lee, Young Uk [Koryo general Hospital, Seoul (Korea, Republic of)

    1990-07-15

    Temporal bone CT was done in 697 patients from April 1985 to October 1989. The abnormal findings were seen in 453 patients, which were chronic otitis media in 355 patients, fracture in 49 patients and congenital anomaly in 44 patients, etc. The abnormal findings of inner ear were observed on 46 patients. The results were summarized as follows : 1. The incidence of inner ear involvement by chronic otitis media was 7.3% (26/355 : labyrinthine fistula in 17 patients, labyrinthitis ossificans in 9 patients). Labyrinthine fistula was most commonly located on lateral semicircular canal (15/17, 88.2%). 2. Fusion of vestibule with lateral semicircular canal and formation of common cavity was demonstrated incidentally in 5 patients (0.7% of total number of temporal bone CT), and bilateral in 3 patients. 3. The incidence of inner ear anomaly in congenital ear anomaly was 11.4% (5/44). All cases were bilateral and three patients showed associated middle ear anomaly. 4. The incidence of involvement of bony labyrinth in temporal bone fracture was 10.2% (5/49). Labyrinthine fracture was seen all patients of transverse(3) and mixed fracture(1). In longitudinal fracture, labyrinthine fracture was seen in 2.2% (1/45). 5. Others were traumatic labyrinthitis ossificans(1), intracanalicular acoustic neuroma(3) and facial nerve neuroma(1)

  9. MORPHOLOGICAL VARIATIONS IN HUMAN FETAL EAR OSSICLES-A STUDY

    Directory of Open Access Journals (Sweden)

    M. Pramila Padmini

    2013-09-01

    Full Text Available Aim: To study the morphological variation, if any, of the ear ossicles in the human fetuses and use of the study in medical applications. Materials And Methods :This study is performed on 100 sets of middle ear ossicles, each set consisting of Malleus, Incus and Stapes, which were taken from 50 fetal cadavers left and right sides of both Result: All the three ossicles showed variations in their morphology and more so in the stapes. Discussion: There are few studies in the literature on individual differences in these ossicles and these studies were on either adult or different species. Conclusion: the ear ossicles of the destitute human fetuses can be used as homografts to replace eroded adult middle ear ossicles.

  10. Travel Inside the Ear

    Medline Plus

    Full Text Available ... soft sound or a loud sound. The sound passes through the outer ear and is funneled into ... is filled with fluid, through the cochlea, and passes the vibration of the sound through the hair ...

  11. Ear infection - acute

    Science.gov (United States)

    ... over-the-counter medicines such as ibuprofen or acetaminophen for pain or fever. Do NOT give aspirin ... get worse New symptoms appear, especially severe headache, dizziness, swelling around the ear, or twitching of the ...

  12. External Otitis (Swimmer's Ear)

    Science.gov (United States)

    ... otitis (otomycosis), typically caused by Aspergillus niger or Candida albicans, is less common. Boils are usually caused by ... form in the ear canal. Otomycosis caused by Candida albicans does not cause any visible fungi to form ...

  13. Impact of Placement of In-the-Ear Antenna on Ear-to-Ear Path Gain

    DEFF Research Database (Denmark)

    Kammersgaard, Nikolaj Peter Iversen; Kvist, Søren H.; Thaysen, Jesper; Jakobsen, Kaj Bjarne

    2015-01-01

    An in-the-ear antenna is rotated in the concha. For the different placements the ear-to-ear path gain is simulated and measured. The simulations and measurements show that the ear-to-ear path gain varies with more than 15 dB even though it is the same antenna that occupies the same volume, which...... has only been rotated. This illustrates the importance of the correct placement of the antenna. The variation of the ear-to-ear path gain is compared with the far-field efficiency in order to explain part of the variation. The best and worst placements’ radiation patterns are analyzed....

  14. Schroedinger's cat

    International Nuclear Information System (INIS)

    The issue is to seek quantum interference effects in an arbitrary field, in particular in psychology. For this a digest of quantum mechanics over finite-n-dimensional Hilbert space is invented. In order to match crude data not only von Neumann's mixed states are used but also a parallel notion of unsharp tests. The mathematically styled text (and earlier work on multibin tests, designated MB) deals largely with these new tests. Quantum psychology itself is only given a foundation. It readily engenders objections; its plausibility is developed gradually, in interlocking essays. There is also the empirically definite proposal that (state, test, outcome)-indexed counts be gathered to record data, then fed to a 'matrix format' (MF) search for quantum models. A previously proposed experiment in visual perception which has since failed to find significant quantum correlations, is discussed. The suspicion that quantum mechanics is all around goes beyond MF, and 'Schroedinger's cat' symbolizes this broader perspective. (author)

  15. Radiotherapy for malignant tumor of the ear

    International Nuclear Information System (INIS)

    Fifteen patients with malignant tumor of the ear were treated with radiotherapy between January 1966 and May 1993. The age ranged from 3 to 81 years with a mean age of 52, and male to female ratio was 10 to 5. Tumor sites were the external auditory canal in 12 cases and middle ear in 3 cases. There were 4 cases in T1, 8 in T2, and 3 in T3 by Stell's stage classification, and there were 13 in N0, 1 in N1 and 1 in N2, which were all M0. There were 10 squamous cell carcinomas, 3 adenoid cystic carcinomas. 1 liposarcoma and 1 rhabdomyosarcoma. Radiotherapy was administered to 12 cases postoperatively, to 3 cases definitively with a total dose of 48 Gy to 66 Gy in adult cases. The follow-up period ranged from 11 months to 15 years and 3 months (mean 8 years). The overall local control rate and the overall cumulative 5-year rate and the cause specific 5-year survival rate were 73%, 46.9% and 62.5%, respectively. Four cases died of primary ear malignancy and 2 of intercurrent disease. No severe side effect or complication has been observed. Radiotherapy combined with surgery is a promising modality for treatment of ear malignancy. (author)

  16. [Inner Ear Hearing Loss].

    Science.gov (United States)

    Hesse, G

    2016-06-01

    Hearing loss is one of the most dominant handicaps in modern societies, which additionally very often is not realized or not admitted. About one quarter of the general population suffers from inner ear hearing loss and is therefore restricted in communicational skills. Demographic factors like increasing age play an important role as well as environmental influences and an increasing sound and noise exposure especially in leisure activities. Thus borders between a "classical" presbyacusis - if it ever existed - and envirionmentally induced hearing loss disappear. Today restrictions in hearing ability develop earlier in age but at the same time they are detected and diagnosed earlier. This paper can eventually enlighten the wide field of inner ear hearing loss only fragmentarily; therefore mainly new research, findings and developments are reviewed. The first part discusses new aspects of diagnostics of inner ear hearing loss and different etiologies. PMID:27259171

  17. The visible ear simulator: a public PC application for GPU-accelerated haptic 3D simulation of ear surgery based on the visible ear data

    DEFF Research Database (Denmark)

    Sørensen, Mads Sølvsten; Mosegaard, Jesper; Trier, Peter

    2009-01-01

    BACKGROUND: Existing virtual simulators for middle ear surgery are based on 3-dimensional (3D) models from computed tomographic or magnetic resonance imaging data in which image quality is limited by the lack of detail (maximum, approximately 50 voxels/mm3), natural color, and texture of the sour...

  18. Radiation therapy for carcinoma of the ear

    International Nuclear Information System (INIS)

    Carcinoma of the ear is rarely reported. From 1978 through 1992, we treated 9 patients, of whom 5 had malignant tumors of the external auditory canal and 4 had malignant tumors of the middle ear, with radiation. These patients accounted for only 0.9% of all patients with head and neck carcinomas treated with radiation at our hospital. Most patients had otorrhea and otalgia, but few patients had specific symptoms of carcinoma. The outcome in cases in which radiotherapy was given after tumor was completely resected was good. The overall 5-year survival rate was 55%. In addition, the 3-year survival rates in cases of carcinoma of the middle ear and of the external auditory canal were 50% and 60%. However, there was no statistical difference in 5-year survival rates between the two sites. We believe factors that affect prognosis are early diagnosis of malignant change, the area of tumor involvement at diagnosis, and combined therapy with surgery and radiation. (author)

  19. Ear piercings Revisited

    Directory of Open Access Journals (Sweden)

    Mahendra S Naik

    2013-12-01

    Full Text Available Piercing of the ears and body is an age old practice of adornment. Piercing, is defined as the insertion of a needle to create a fistula for decorative ornaments1.The earliest record of piercing, is in the Bible (Genesis 24:22, where a golden earring was one of the gifts given to Rebecca, wife of Abraham’s son Isaac. Over the ages, ear piercings have become a widespread practice enjoying social, cultural and religious acceptance. Body piercing is beyond the scope of this article.

  20. Ear, Hearing and Speech

    DEFF Research Database (Denmark)

    Poulsen, Torben

    2000-01-01

    An introduction is given to the the anatomy and the function of the ear, basic psychoacoustic matters (hearing threshold, loudness, masking), the speech signal and speech intelligibility. The lecture note is written for the course: Fundamentals of Acoustics and Noise Control (51001)......An introduction is given to the the anatomy and the function of the ear, basic psychoacoustic matters (hearing threshold, loudness, masking), the speech signal and speech intelligibility. The lecture note is written for the course: Fundamentals of Acoustics and Noise Control (51001)...

  1. Ear Cotton Buds Forgotten in External Ear Canals

    OpenAIRE

    SAĞLAM, Ömer; SAAT, Bülent; Dursun, Engin; ÇETİN, Bilal; KARAPINAR, Uğur; Şahan, Murat; Güneş, Mustafa; TAŞCAN, İnci

    2014-01-01

    Foreign bodies in the external canal of the ear are an emergency problem encountered by the otolaryngologist almost every day. Foreign bodies may cause hearing loss, pain, severe itching, ear discharge, tinnitus and vertigo. There is also great risk for complications during the removal of foreign bodies. An 82 years old male patient with dementia suffering from hearing loss, pain, itching and ear discharge in both ears was referred to our clinic as an emergency case. Otoscopic examination rev...

  2. Cat and Dog Bites

    Science.gov (United States)

    MENU Return to Web version Cat and Dog Bites Cat and Dog Bites How should I take care of a bite from a cat or a dog? Whether from a family pet or a neighborhood stray, cat and dog bites are common. Here are some things you ...

  3. The ear in fetal MRI: what can we really see?

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Nuno Canto [Neuroradiology Section C., Campos Costa, Fragosela, Viseu (Portugal); Uppsala University, Department of Radiology, Uppsala (Sweden); Teixeira, Joao [Department of Neuroradiology, Porto (Portugal); Raininko, Raili; Wikstrom, Johan [Uppsala University, Department of Radiology, Uppsala (Sweden)

    2011-12-15

    The aim of this study was to investigate the ability to depict the components of the ear on brain-oriented fetal MRI studies. Retrospective evaluation of the ear in MRI studies was performed post-mortem in 16 fetuses ranging from 15 to 22 gestation weeks (GW), and in 122 examinations in vivo of fetuses ranging from 20 to 38 GW. The cochlea, vestibular apparatus, middle ear, and external auditory canal were separately graded according to the components that were delineated. The components of the inner and middle ear were fully delineated in 100% of the post-mortem examinations, but the external auditory canals were only seen in only 25%. In the in vivo group, the imaging detail was much lower. Cochlear turns could be identified in 75% of the fetuses, the vestibule and the lateral semicircular canals in 72% andossicles in 70%. Before 25 GW, the ability to identify these individual parts was 50%, 30%, and 33%, respectively, and above it was 89%, 93%, and 90%. In most cases, the external auditory canals could only be seen after 29 GW. In fetal MRI studies in vivo, it is possible to depict the components of the ear in the majority of the fetuses, in such a manner as to exclude major malformations. However, MRI might not provide enough detail to rule out pathology of the ear before 25 GW, this being a critical age for pregnancy management in many countries. (orig.)

  4. The ear in fetal MRI: what can we really see?

    International Nuclear Information System (INIS)

    The aim of this study was to investigate the ability to depict the components of the ear on brain-oriented fetal MRI studies. Retrospective evaluation of the ear in MRI studies was performed post-mortem in 16 fetuses ranging from 15 to 22 gestation weeks (GW), and in 122 examinations in vivo of fetuses ranging from 20 to 38 GW. The cochlea, vestibular apparatus, middle ear, and external auditory canal were separately graded according to the components that were delineated. The components of the inner and middle ear were fully delineated in 100% of the post-mortem examinations, but the external auditory canals were only seen in only 25%. In the in vivo group, the imaging detail was much lower. Cochlear turns could be identified in 75% of the fetuses, the vestibule and the lateral semicircular canals in 72% andossicles in 70%. Before 25 GW, the ability to identify these individual parts was 50%, 30%, and 33%, respectively, and above it was 89%, 93%, and 90%. In most cases, the external auditory canals could only be seen after 29 GW. In fetal MRI studies in vivo, it is possible to depict the components of the ear in the majority of the fetuses, in such a manner as to exclude major malformations. However, MRI might not provide enough detail to rule out pathology of the ear before 25 GW, this being a critical age for pregnancy management in many countries. (orig.)

  5. Lumped parametric model of the human ear for sound transmission.

    Science.gov (United States)

    Feng, Bin; Gan, Rong Z

    2004-09-01

    A lumped parametric model of the human auditoria peripherals consisting of six masses suspended with six springs and ten dashpots was proposed. This model will provide the quantitative basis for the construction of a physical model of the human middle ear. The lumped model parameters were first identified using published anatomical data, and then determined through a parameter optimization process. The transfer function of the middle ear obtained from human temporal bone experiments with laser Doppler interferometers was used for creating the target function during the optimization process. It was found that, among 14 spring and dashpot parameters, there were five parameters which had pronounced effects on the dynamic behaviors of the model. The detailed discussion on the sensitivity of those parameters was provided with appropriate applications for sound transmission in the ear. We expect that the methods for characterizing the lumped model of the human ear and the model parameters will be useful for theoretical modeling of the ear function and construction of the ear physical model. PMID:15300453

  6. Autoimmune Inner Ear Disease (AIED)

    Science.gov (United States)

    ... to order. Mention “VEDA” to receive a 15% discount. Paid Advertisement Disclaimer Information on this website is ... treatment of autoimmune inner ear disease. Although drug companies are not directly studying treatments for inner ear ...

  7. Ear - blocked at high altitudes

    Science.gov (United States)

    High altitudes and blocked ears; Flying and blocked ears; Eustachian tube dysfunction - high altitude ... you are going up or coming down from high altitudes. Chewing gum the entire time you are changing ...

  8. ENDOSCOPIC TYPMPANOMASTOID EXPLORATION [FUNCTIONAL ENDOSCOPIC EAR SURGERY-FEES

    Directory of Open Access Journals (Sweden)

    Sanjay Kumar

    2012-03-01

    Full Text Available Tympano mastoidectomy is usually performed using operating microscope. This study reports a case series of tympanomastoidectomy which was performed using an endoscope.Endoscopic Tympanomastoidectomy for atticoantral type of CSOM is an excellent technique for complete removal of cholesteatoma especially from inaccessible areas of middle ear cleft including facial recess, sinustympani Transmeatal removal of disease from mastoid antrum and even tip cells is possible with endoscopes. Preservation of as much of normal mucosa of the middle ear cleft is possible with thistechnique, which promotes early reaeration of the mastoid cavity leading to better hearing outcome.Soft wall reconstruction has distinctive advantage of short additional time for reconstruction procedures, restoration of self cleaning EAC, early post operative epithelisation of tympanic membrane and the EAC. Limitation of endoscopic technique: The endoscopic technique of tympanomastoidectomy with softwall reconstruction is not possible in cases with large mastoid cavity and in ears where a thin lateral rim of bony meatal wall (that can support soft wall is retained, because of extensive disease.Like Functional Endoscopic sinus surgery (FESS for nose, Endoscopes have changed the treatment concept of atticoantral disease, with complete removal of the disease and preservation of normal mucosa, that restores the normal physiology of middle ear cleft. Thishas led to the development of new concept of Functional Endoscopic Ear Surgery (FEES for atticoantral type of CSOM.

  9. Travel Inside the Ear

    Medline Plus

    Full Text Available Search Search form Search A–Z Index Español Menu Home Health Info Hearing, Ear Infections, and Deafness Balance Taste and Smell Voice, Speech, and Language Información en español Statistics Health Resources ...

  10. Pressure difference receiving ears

    DEFF Research Database (Denmark)

    Michelsen, Axel; Larsen, Ole Næsbye

    2007-01-01

    Directional sound receivers are useful for locating sound sources, and they can also partly compensate for the signal degradations caused by noise and reverberations. Ears may become inherently directional if sound can reach both surfaces of the eardrum. Attempts to understand the physics of such...

  11. Travel Inside the Ear

    Medline Plus

    Full Text Available Search Search form Search A–Z Index Español Menu Home Health Info Hearing, Ear Infections, and Deafness Balance Taste and Smell ... Human Services National Institutes of Health USA.gov—Government Made Easy NIH… Turning Discovery Into Health ® National ...

  12. From Ear to Brain

    Science.gov (United States)

    Kimura, Doreen

    2011-01-01

    In this paper Doreen Kimura gives a personal history of the "right-ear effect" in dichotic listening. The focus is on the early ground-breaking papers, describing how she did the first dichotic listening studies relating the effects to brain asymmetry. The paper also gives a description of the visual half-field technique for lateralized stimulus…

  13. Travel Inside the Ear

    Medline Plus

    Full Text Available ... form Search A–Z Index Español Menu Home Health Info Hearing, Ear Infections, and Deafness Balance Taste ... Voice, Speech, and Language Información en español Statistics Health Resources Clinical Studies Research Extramural Research Intramural Research ...

  14. Travel Inside the Ear

    Medline Plus

    Full Text Available ... Ear Infections, and Deafness Balance Taste and Smell Voice, Speech, and Language Información en español Statistics Health ... can answer your questions in English or Spanish. Voice: (800) 241-1044 TTY: (800) 241-1055 nidcdinfo@ ...

  15. Cats of the Pharaohs: Genetic Comparison of Egyptian Cat Mummies to their Feline Contemporaries.

    Science.gov (United States)

    Kurushima, Jennifer D; Ikram, Salima; Knudsen, Joan; Bleiberg, Edward; Grahn, Robert A; Lyons, Leslie A

    2012-10-01

    The ancient Egyptians mummified an abundance of cats during the Late Period (664 - 332 BC). The overlapping morphology and sizes of developing wildcats and domestic cats confounds the identity of mummified cat species. Genetic analyses should support mummy identification and was conducted on two long bones and a mandible of three cats that were mummified by the ancient Egyptians. The mummy DNA was extracted in a dedicated ancient DNA laboratory at the University of California - Davis, then directly sequencing between 246 and 402 bp of the mtDNA control region from each bone. When compared to a dataset of wildcats (Felis silvestris silvestris, F. s. tristrami, and F. chaus) as well as a previously published worldwide dataset of modern domestic cat samples, including Egypt, the DNA evidence suggests the three mummies represent common contemporary domestic cat mitotypes prevalent in modern Egypt and the Middle East. Divergence estimates date the origin of the mummies' mitotypes to between two and 7.5 thousand years prior to their mummification, likely prior to or during Egyptian Predyanstic and Early Dynastic Periods. These data are the first genetic evidence supporting that the ancient Egyptians used domesticated cats, F. s. catus, for votive mummies, and likely implies cats were domesticated prior to extensive mummification of cats. PMID:22923880

  16. Cats of the Pharaohs: Genetic Comparison of Egyptian Cat Mummies to their Feline Contemporaries

    Science.gov (United States)

    Kurushima, Jennifer D.; Ikram, Salima; Knudsen, Joan; Bleiberg, Edward; Grahn, Robert A.; Lyons, Leslie A.

    2012-01-01

    The ancient Egyptians mummified an abundance of cats during the Late Period (664 - 332 BC). The overlapping morphology and sizes of developing wildcats and domestic cats confounds the identity of mummified cat species. Genetic analyses should support mummy identification and was conducted on two long bones and a mandible of three cats that were mummified by the ancient Egyptians. The mummy DNA was extracted in a dedicated ancient DNA laboratory at the University of California – Davis, then directly sequencing between 246 and 402 bp of the mtDNA control region from each bone. When compared to a dataset of wildcats (Felis silvestris silvestris, F. s. tristrami, and F. chaus) as well as a previously published worldwide dataset of modern domestic cat samples, including Egypt, the DNA evidence suggests the three mummies represent common contemporary domestic cat mitotypes prevalent in modern Egypt and the Middle East. Divergence estimates date the origin of the mummies’ mitotypes to between two and 7.5 thousand years prior to their mummification, likely prior to or during Egyptian Predyanstic and Early Dynastic Periods. These data are the first genetic evidence supporting that the ancient Egyptians used domesticated cats, F. s. catus, for votive mummies, and likely implies cats were domesticated prior to extensive mummification of cats. PMID:22923880

  17. Ear Cubes for local controlled drug delivery to the inner ear.

    Science.gov (United States)

    Gehrke, M; Sircoglou, J; Gnansia, D; Tourrel, G; Willart, J-F; Danede, F; Lacante, E; Vincent, C; Siepmann, F; Siepmann, J

    2016-07-25

    A new type of advanced drug delivery systems is proposed: Miniaturized implants, which can be placed into tiny holes drilled into (or close to) the oval window. They consist of two parts: 1) A cylinder, which is inserted into the hole crossing the oval window. The cylinder (being longer than the depth of the hole) is partly located within the inner ear and surrounded by perilymph. This provides direct access to the target site, and at the same time assures implant fixation. 2) A cuboid, which is located in the middle ear, serving as a drug reservoir. One side of the cuboid is in direct contact with the oval window. Drug release into the cochlea occurs by diffusion through the cylindrical part of the Ear Cubes and by diffusion from the cuboid into and through the oval window. High precision molds were used to prepare two differently sized Ear Cubes by injection molding. The miniaturized implants were based on silicone and loaded with different amounts of dexamethasone (10 to 30 % w/w). The systems were thoroughly characterized before and upon exposure to artificial perilymph at 37°C. Importantly, drug release can effectively be controlled and sustained during long time periods (up to several years). Furthermore, the implants did not swell or erode to a noteworthy extent during the observation period. Drug diffusion through the polymeric matrix, together with limited dexamethasone solubility effects, seem to control the resulting drug release kinetics, which can roughly be estimated using mathematical equations derived from Fick's second law. Importantly, the proposed Ear Cubes are likely to provide much more reliable local long term drug delivery to the inner ear compared to liquid or semi-solid dosage forms administered into the middle ear, due to a more secured fixation. Furthermore, they require less invasive surgeries and can accommodate higher drug amounts compared to intracochlear implants. Thus, they offer the potential to open up new horizons for innovative

  18. Ear Candling: A Dangerous Pleasure?

    Directory of Open Access Journals (Sweden)

    Kianoosh Nahid

    2011-01-01

    Ear candling is claimed to create negative pressure for drawing cerumen from the ear and to benefit the ears in many ways. It is however not free of complications and is now banned. Here we would like to highlight potential complications to this.

  19. Ear Candling: A Dangerous Pleasure?

    Directory of Open Access Journals (Sweden)

    Kianoosh Nahid

    2011-01-01

    Full Text Available Ear candling is an alternative medicine practice alleged to enhance general health by putting an end of a hollow candle in the ear canal and lighting up the other end of it. It also is advertised for cerumen and debris (bacteria and fungi removal. Ear candling is claimed to create negative pressure for drawing cerumen from the ear and to benefit the ears in many ways. It is however not free of complications and is now banned. Here we would like to highlight potential complications to this.

  20. Radiologic evaluation of the ear anatomy in pediatric cholesteatoma.

    Science.gov (United States)

    Manolis, Evangelos N; Filippou, Dimitrios K; Tsoumakas, Constantinos; Diomidous, Marianna; Cunningham, Michael J; Katostaras, Theophanis; Weber, Alfred L; Eavey, Roland D

    2009-05-01

    The aim of the study was to describe computed tomography (CT) findings in middle ear cholesteatoma in pediatric patients. A cohort of 32 children with cholesteatoma (3-14 years old) entered the study. From them, 30 presented acquired cholesteatoma (AC), and 2 presented congenital cholesteatoma. All of the children were investigated using CT before surgery of the middle ear and mastoid. Computed tomography was performed with 1- or 2-mm axial and coronal sections of both temporal bones. Nineteen children with AC (63.3%) revealed a diffuse soft-tissue density isodense with muscle, whereas in 6 of them, the mass mimicked inflammation. The remaining revealed localized soft-tissue mass with partially lobulated contour. In AC, ossicular erosion was detected in 23 cases (76.7%), abnormal pneumatization in 19 cases (63.3%), and erosion-blunting of spur and enlargement of middle ear or mastoid in 8 cases (26.7%). The 2 congenital cholesteatomas revealed soft-tissue mass with polypoid densities, while a semicircular canal fistula was detected in one of them. High-resolution CT facilitates early diagnosis and appropriate treatment of pediatric cholesteatoma by assessing the anatomic abnormalities and the extent of disease, which are crucial in middle ear and mastoid surgery. PMID:19390457

  1. Diagnosis and surgical management of obstructive ureteral calculi in cats: 11 cases (1993-1996)

    International Nuclear Information System (INIS)

    To evaluate diagnostic methods, surgical treatment, perioperative management, and renal function of cats with obstructive calcium oxalate ureteroliths. Retrospective case series. 11 cats that underwent surgery for removal of calcium oxalate ureteroliths. Medical records were reviewed, and the following information was recorded: signalment; results of physical examination, clinicopathologic analyses, and abdominal imaging; surgical procedure; postoperative management; and results of ureterolith quantitative analysis. Ureteroliths in the proximal portion of the ureter were removed from 5 cats (pyelotomy, 1 cat; unilateral ureterotomy, 2 cats; bilateral ureterotomies, 2 cats). Calculi in the middle and distal part of the ureter were removed by partial ureterectomy and ureteroneocystostomy (6 cats). Ten cats recovered from surgery and were discharged from the hospital. One cat died from unknown causes 4 months after surgery, and 1 cat had a nephrectomy elsewhere 5 weeks after ureterolith removal. Eight cats were evaluated 12 to 20 months after surgery. Of these, 2 cats that were markedly azotemic before surgery improved after surgery, and 2 cats developed nephroliths after surgery. Also, of 5 cats that had nephroliths that were not removed at the time of surgery, 4 still had visible nephroliths. One cat had recurrent ureteral obstruction from a ureterolith and persistent urinary tract infection. Ureteroliths or ultrasonographic evidence of ureteral obstruction were not detected in other cats. A combination of microsurgical techniques and intensive postoperative care is necessary to minimize morbidity of cats after removal of a ureterolith. Renal function may improve or stabilize after removal of the ureteral obstruction

  2. 中药茶饮结合耳穴治疗中学生痤疮120例疗效观察%Curative Observation on Herbal Tea Combined with Ear Acupoint in Treating 120 Middle School Students with Acne

    Institute of Scientific and Technical Information of China (English)

    安维新; 张正华

    2016-01-01

    Objective: To survey curative effects of herbal tea and ear acupoint in the treatment for the students with acne. Methods: All 633 cases who were suffering from acne in health examination ofJiayuguan2014 College entrance examination, 230 patients were chosen and randomized into 120 cases of the treatment group and 110 cases of the control group, the treatment group were treated by herbal tea and ear acupoint and the control group orally took Viaminati capsules, 25mg each time, twice per day, and 0.025% tretinoin cream for external use, skin lesions ofthe acne were observed in six weeks. Results: Herbal tea and ear acupoint are effective in treating acne, and total ef-fective rate reached 95.8%. Conclusion: Spicy and sweet food and staying up late are the important inducing and ag-gravating factors of acne, herbal tea and ear acupoint are superior to western medicine in treating acne, and it's sim-ple and easily to accept by the students.%目的:观察中药茶饮和耳穴治疗中学生痤疮的临床疗效。方法:将嘉峪关市2014年高考体检痤疮学生633例,选择其中230例患者并随机分为治疗组120例和对照组110例,治疗组以中药茶饮结合耳穴治疗,对照组口服维胺酯胺囊25 mg/次,2次/d,并外用0.025%维A酸乳膏,6周后观察痤疮皮损情况。结果:中药茶饮结合耳穴治疗痤疮效果明显,总有效率达95.8%。结论:辛辣、甜腻饮食和熬夜是痤疮重要的诱发和加重因素,中药茶饮结合耳穴治疗学生痤疮优于西药对照组,而且方法简单,易为学生接受。

  3. High-resolution three-dimensional diffusion-weighted imaging of middle ear cholesteatoma at 3.0 T MRI: Usefulness of 3D turbo field-echo with diffusion-sensitized driven-equilibrium preparation (TFE–DSDE) compared to single-shot echo-planar imaging

    International Nuclear Information System (INIS)

    Objective: To prospectively evaluate the usefulness of a newly developed high-resolution three-dimensional diffusion-weighted imaging method, turbo field-echo with diffusion-sensitized driven-equilibrium (TFE–DSDE) in diagnosing middle-ear cholesteatoma by comparing it to conventional single-shot echo-planar diffusion-weighted imaging (SS-EP DWI). Materials and methods: Institutional review board approval and informed consent from all participants were obtained. We studied 30 patients with preoperatively suspected acquired cholesteatoma. Each patient underwent an MR examination including both SS-EP DWI and DSDE-TFE using a 3.0 T MR scanner. Images of the 30 patients (60 temporal bones including 30 with and 30 without cholesteatoma) were reviewed by two independent neuroradiologists. The confidence level for the presence of cholesteatoma was graded on a scale of 0–2 (0 = definite absence, 1 = equivocal, 2 = definite presence). Interobserver agreement as well as sensitivity, specificity, and accuracy for detection were assessed for the two reviewers. Results: Excellent interobserver agreement was shown for TFE–DSDE (κ = 0.821) whereas fair agreement was obtained for SS-EP DWI (κ = 0.416). TFE–DSDE was associated with significantly higher sensitivity (83.3%) and accuracy (90.0%) compared to SS-EP DWI (sensitivity = 35.0%, accuracy = 66.7%; p < 0.05). No significant difference was found in specificity (96.7% for TFE–DSDE, 98.3% for SS-EP DWI) Conclusion: With increased spatial resolution and reduced susceptibility artifacts, TFE–DSDE improves the accuracy in diagnosing acquired middle ear cholesteatomas compared to SS-EP DWI

  4. Radio scanning studies of ear and sinuses

    International Nuclear Information System (INIS)

    Radiophotoscanners are relatively new diagnostic tools. They provide visual images as well as quantitative information about the behavior in the human body of special substances called radionuclides. A preliminary report is presented about the use of a radioactive gas, xenon-133, to study the ventilation of the middle ear and sinuses. At this point these results cannot be considered definitive or conclusive. If standardization and control of variables is achieved, this technique may play an important role in the physiological and pathological assessment of these cavities. (U.S.)

  5. Nonlinear dynamics of the mammalian inner ear

    CERN Document Server

    Szalai, Robert; Homer, Martin

    2015-01-01

    A simple nonlinear transmission-line model of the cochlea with longitudinal coupling is introduced that can reproduce Basilar membrane response and neural tuning in the chinchilla. It is found that the middle ear has little effect on cochlear resonances, and hence conclude that the theory of coherent reflections is not applicable to the model. The model also provides an explanation of the emergence of spontaneous otoacoustic emissions (SOAEs). It is argued that SOAEs arise from Hopf bifurcations of the transmission-line model and not from localized instabilities. The paper shows that emissions can become chaotic, intermittent and fragile to perturbations.

  6. Retrospective study of ear findings of dogs submitted to cranial tomography in FMVZ - UNESP, Botucatu

    International Nuclear Information System (INIS)

    Computed tomography (CT) is an important imaging modality in the diagnosis of ear alterations, especially those affecting the middle ear. In this retrospective study, in which the cranial CT scans of 151 dogs were evaluated, the most common finding was the mineralization of the external auditory cartilage, followed by secretions in external and middle ear and tissue in these two regions. The average age of affected animals ranged from 6-9 years. Mixed breed dogs were the most affected animals, followed by cockers, boxers, poodles, labrador retrievers, german shepherds and pit bulls. (author)

  7. Cat Scratch Disease

    Science.gov (United States)

    Cat scratch disease (CSD) is an illness caused by the bacterium Bartonella henselae. Almost half of all cats carry the infection ... symptoms of CSD, call your doctor. Centers for Disease Control and Prevention

  8. Cat Scratch Disease

    Science.gov (United States)

    Cat scratch disease (CSD) is an illness caused by the bacterium Bartonella henselae. Almost half of all cats carry the infection at some ... Poor appetite For people with weak immune systems, CSD may cause more serious problems. The best way ...

  9. External ear canal cholesteatoma after ventilation tube insertion and mastoidectomy

    Directory of Open Access Journals (Sweden)

    Đerić Dragoslava

    2012-01-01

    Full Text Available Introduction. Etiopathogenetically, there are two types of chollesteatomas: congenital, and acquired. Numerous theories in the literature try to explain the nature of the disease, however, the question about cholesteatomas remain still unanswered. The aim of the study was to present a case of external ear canal cholesteatoma (EEC developed following microsurgery (ventilation tube insertion and mastoidectomy, as well as to point ant possible mechanisms if its development. Case report. A 16-yearold boy presented a 4-month sense of fullness in the ear and otalgia on the left side. A year before, mastoidectomy and posterior atticotomy were performed with ventilation tube placement due to acute purulent mastoiditis. Diagnosis was based on otoscopy examination, audiology and computed tomography (CT findings. CT showed an obliterative soft-tissue mass completely filled the external ear canal with associated erosion of subjacent the bone. There were squamous epithelial links between the canal cholesteatoma and lateral tympanic membrane surface. They originated from the margins of tympanic membrane incision made for a ventilation tube (VT insertion. The position of VT was good as well as the aeration of the middle ear cavity. The tympanic membrane was intact and of normal appearance without middle ear extension or mastoid involvement of cholesteatoma. Cholesteatoma and ventilation tube were both removed. The patient recovered without complications and shortly audiology revealed hearing improving. Follow-up 2 years later, however, showed no signs of the disease. Conclusion. There could be more than one potential delicate mechanism of developing EEC in the ear with VT insertion and mastoidectomy. It is necessary to perform routine otologic surveillance in all patients with tubes. Affected ear CT scan is very helpful in showing the extent of cholesteatoma and bony defects, which could not be assessed by otoscopic examination alone.

  10. Getting a CAT Scan

    Medline Plus

    Full Text Available ... Snowboarding, Skating Crushes What's a Booger? Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands for "computerized axial tomography." Translated, that means ...

  11. Getting a CAT Scan

    Medline Plus

    Full Text Available ... Here's Help White House Lunch Recipes Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands for "computerized axial tomography." Translated, that means ...

  12. Discospondylitis in a cat

    International Nuclear Information System (INIS)

    The incidence and causative agents of discospondylitis in cats are unknown. This report describes a cat with radiologic changes consistent with discospondylitis and concurrent urinary tract infection. As in dogs, discospondylitis should be the primary rule out for vertebral end plate lysis in cats

  13. Getting a CAT Scan

    Medline Plus

    Full Text Available ... Crushes What's a Booger? Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands for "computerized axial tomography." Translated, that ...

  14. Ear Recognition Based on Gabor Features and KFDA

    OpenAIRE

    Li Yuan; Zhichun Mu

    2014-01-01

    We propose an ear recognition system based on 2D ear images which includes three stages: ear enrollment, feature extraction, and ear recognition. Ear enrollment includes ear detection and ear normalization. The ear detection approach based on improved Adaboost algorithm detects the ear part under complex background using two steps: offline cascaded classifier training and online ear detection. Then Active Shape Model is applied to segment the ear part and normalize all the ear images to the s...

  15. Ultrastructural myocardial changes in seven cats with spontaneous hypertrophic cardiomyopathy

    DEFF Research Database (Denmark)

    Christiansen, Liselotte Bruun; Prats Gavalda, Clara; Hyttel, Poul;

    2015-01-01

    OBJECTIVES: Hypertrophic cardiomyopathy (HCM) is the most common heart disease in cats and shares clinical and pathological characteristics with human HCM. Little is known about the pathogenic mechanisms underlying development of spontaneous feline HCM. ANIMALS: The study population consisted of...... seven cats diagnosed with HCM and eight age-matched cats with no evidence of cardiac disease. METHODS: Fresh myocardial biopsies taken from the middle of the left ventricular posterior free wall were obtained and examined with transmission electron microscopy. RESULTS: Electron microscopic examination...... showed ultrastructural aberrations of the myocardial cytoarchitecture and of the interstitium in the seven cats with HCM. In the most severely affected cats the myofibrils were disorganized and subsarcolemmal mitochondria were depleted. In control cats, contraction band artifacts were commonly seen...

  16. Manufacturing and in vivo inner ear visualization of MRI traceable liposome nanoparticles encapsulating gadolinium

    Directory of Open Access Journals (Sweden)

    Kinnunen Paavo KJ

    2010-12-01

    Full Text Available Abstract Background Treatment of inner ear diseases remains a problem because of limited passage through the blood-inner ear barriers and lack of control with the delivery of treatment agents by intravenous or oral administration. As a minimally-invasive approach, intratympanic delivery of multifunctional nanoparticles (MFNPs carrying genes or drugs to the inner ear is a future therapy for treating inner ear diseases, including sensorineural hearing loss (SNHL and Meniere's disease. In an attempt to track the dynamics and distribution of nanoparticles in vivo, here we describe manufacturing MRI traceable liposome nanoparticles by encapsulating gadolinium-tetra-azacyclo-dodecane-tetra-acetic acid (Gd-DOTA (abbreviated as LPS+Gd-DOTA and their distribution in the inner ear after either intratympanic or intracochlear administration. Results Measurements of relaxivities (r1 and r2 showed that LPS+Gd-DOTA had efficient visible signal characteristics for MRI. In vivo studies demonstrated that LPS+Gd-DOTA with 130 nm size were efficiently taken up by the inner ear at 3 h after transtympanic injection and disappeared after 24 h. With intracochlear injection, LPS+Gd-DOTA were visualized to distribute throughout the inner ear, including the cochlea and vestibule with fast dynamics depending on the status of the perilymph circulation. Conclusion Novel LPS+Gd-DOTA were visible by MRI in the inner ear in vivo demonstrating transport from the middle ear to the inner ear and with dynamics that correlated to the status of the perilymph circulation.

  17. MORPHOLOGICAL VARIATIONS IN HUMAN FETAL EAR OSSICLES-A STUDY

    OpenAIRE

    M. Pramila Padmini; B.Narasinga Rao

    2013-01-01

    Aim: To study the morphological variation, if any, of the ear ossicles in the human fetuses and use of the study in medical applications. Materials And Methods :This study is performed on 100 sets of middle ear ossicles, each set consisting of Malleus, Incus and Stapes, which were taken from 50 fetal cadavers left and right sides of both Result: All the three ossicles showed variations in their morphology and more so in the stapes. Discussion: There are few studies in the literature on indi...

  18. "Swimmer's Ear" (Otitis Externa) Prevention

    Science.gov (United States)

    ... Skin, Ear, & Eye Illness Respiratory Illness Neurologic Illness Wound Infections Other Illnesses Swimming Pool Operation & Disinfection Microbial Testing & Disinfection Swimming Pool Chemicals Injuries & Outdoor ...

  19. Epidemiology, genetic divergence and acaricides of Otodectes cynotis in cats and dogs

    Directory of Open Access Journals (Sweden)

    Fayez Awadalla Salib and Taher Ahamed Baraka

    2011-06-01

    Full Text Available Otodectes cynotis mite is a common parasite of cats and dogs, survives in the ear canal and causes otitis externa, itching and severe complications. The microscopic examination of ear swabs, skin scraps and faecal samples of 289 cats and 223 dogs revealed that mono-specific and mixed infestations of Otodectes cynotis in cats were (24.56% and(6.57% while in dogs were (7.17% and (4.48% respectively. The highest rate of infestation was in young cats and the lowest was in elder dogs. The mixed infestations were found in combination with Sarcoptes, Demodex, Dermatophytes, Ticks, Fleas, Ascarids, Dipylidium and Isospora. The RAPD-PCR proved the genetic divergence between cat and dog isolates whereas they are morphologically similar. Selamectin-pour on, Doramectin-subcutaneous injection and Ivermectin-Ear drops were evaluated two weeks post treatment. The rate of success in cats were (96.66% ,(90.00% and (83.33% and in dogs were (77.77%, (75.00% and (66.66% respectively. It is concluded that Selamectin pour on is the best acaricide against Otodectes cynotis in both cats and dogs. It is also needed to prepare a vaccine in the future to prevent the infestation with Otodectes cynotis and its complications. [Vet. World 2011; 4(3.000: 109-112

  20. A Catalogue of Anatomical Fugitive Sheets: Cat. 1-10

    OpenAIRE

    1999-01-01

    Images Cat. 1 Cat. 2 (a) Cat. 2 (b) Cat. 2 (c) Cat. 2 (d) Cat. 2 (e) Cat. 2 (f) Cat. 3: 1 (a) Cat. 3: 1 (b) Cat. 3: 2 (a) Cat. 3: 2 (b) Cat. 4: 1 Cat. 4: 2 Cat. 6: 1 (a) Cat. 6: 1 (b) Cat. 6: 2 (a) Cat. 6: 2 (b) Cat. 7: 1 (a) Cat. 7: 1 (b) Cat. 7: 2 (a) Cat. 7: 2 (b) Cat. 8: 1 Cat. 9: 1 Cat. 9: 2 Cat. 10: 1 Cat. 10: 2

  1. Investigation of the ear-to-ear radio propagation channel

    DEFF Research Database (Denmark)

    Kvist, Søren Helstrup; Thaysen, J; Jakobsen, Kaj Bjarne

    2011-01-01

    The effect of the head size on the ear-to-ear radio propagation channel as a part of a body-centric wireless network is examined. The channel quality is evaluated at 2:45 GHz in terms of path gain (∣S21∣) between two monopole antennas that are placed normal to the surface of the head. The...

  2. MICROBIOLOGY OF ITCHY EARS

    Directory of Open Access Journals (Sweden)

    Vijin Ravindran Nambiar

    2015-04-01

    Full Text Available Objective: To study microbiology of external auditory canal in patients with itchy ears and to also study susceptibility profiles of pathogenic organisms to aid in appropriate management. Materials & Methods: A total of hundred patients were selected. An external ear canal swab was taken. For recovery of bacteria, the samples were emulsified in a solution of BHI broth to study aerobic and anaerobic bacteria. Fungal microbiology was studied by KOH mount and fungal culture. Culture and sensitivity was done for the pathogenic organisms. Results: Of the total hundred patients, 48% patients had no growth. There were no anaerobes isolated. Of the remaining 52% cases, 33% of the growth was aerobic bacteria and 19% of the growth was fungi. Of the aerobic bacteria, coagulase negative staphylococcus was isolated from 22 patients, staphylococcus aureus from 9 patients and pseudomonas aeruginosa from 2 patients. Of the fungal species, candida was isolated from 11 patients and aspergillus niger from 8 patients. Conclusion: Our study concluded that there need not be an underlying bacterial or fungal infection to cause itching as evidenced by a condition called asteatosis. Hence, asteatosis should be considered as one of the differential diagnosis for chronic and persistent itching when all other causes have been ruled out. We also found that topical ciprofloxacin drops is equally effective against the common bacterial pathogens.

  3. [Cochlear implantation through the middle fossa approach].

    Science.gov (United States)

    Szyfter, W; Colletti, V; Pruszewicz, A; Kopeć, T; Szymiec, E; Kawczyński, M; Karlik, M

    2001-01-01

    The inner part of cochlear implant is inserted into inner ear during surgery through mastoid and middle ear. It is a classical method, used in the majority cochlear centers in the world. This is not a suitable method in case of chronic otitis media and middle ear malformation. In these cases Colletti proposed the middle fossa approach and cochlear implant insertion omitting middle ear structures. In patient with bilateral chronic otitis media underwent a few ears operations without obtaining dry postoperative cavity. Cochlear implantation through the middle fossa approach was performed in this patient. The bone fenster was cut, temporal lobe was bent and petrosus pyramid upper surface was exposed. When the superficial petrosal greater nerve, facial nerve and arcuate eminence were localised, the cochlear was open in the basal turn and electrode were inserted. The patient achieves good results in the postoperative speech rehabilitation. It confirmed Colletti tesis that deeper electrode insertion in the cochlear implantation through the middle fossa approach enable use of low and middle frequencies, which are very important in speech understanding. PMID:11766315

  4. Fusion of the ear bones

    Science.gov (United States)

    ... caused by: Birth (congenital) defect Infection Injury Symptoms Fusion of the bones leads to hearing loss, because the bones are not moving and vibrating in reaction to sound waves. Images Ear anatomy Medical findings based on ear anatomy References Torres AI, ...

  5. Modeling individual differences in ferret external ear transfer functions

    Science.gov (United States)

    Schnupp, Jan W. H.; Booth, John; King, Andrew J.

    2003-04-01

    Individual variations in head and outer ear size, as well as growth of these structures during development, can markedly alter the values of the binaural and monaural cues which form the basis for auditory localization. This study investigated individual differences in the directional component of the head-related transfer function of both adult and juvenile ferrets. In line with previous studies in humans and cats, intersubject spectral differences were found to be reduced by scaling one of the directional transfer functions on a log-frequency axis. The optimal scale factor correlated most highly with pinna cavity height. Optimal frequency scaling reduced interear spectral difference equally well for adult-juvenile comparisons as for comparisons between pairs of adult ears. This illustrates that the developmental changes in localization cue values should be at least partly predictable on the basis of the expected growth rate of the outer ear structures. Predictions of interaural time differences (ITDs) were also derived from the physical dimensions of the head. ITDs were found to be poorly fitted by the spherical head model, while much better predictions could be derived from a model based on von Mises spherical basis functions. Together, these findings show how more accurate estimates of spatial cue values can be made from knowledge of the dimensions of the head and outer ears, and may facilitate the generation of virtual acoustic space stimuli in the absence of acoustical measurements from individual subjects.

  6. A Catalogue of Anatomical Fugitive Sheets: Cat. 11-25

    OpenAIRE

    1999-01-01

    Images Cat. 11 (a) Cat. 11 (b) Cat. 11 (c) Cat. 11 (d) Cat. 12: 1 (a) Cat. 12: 1 (b) Cat. 12: 2 (a) Cat. 12: 2 (b) Cat. 13 Cat. 14 (a) Cat. 14 (b) Cat. 14 (c) Cat. 15 (a) Cat. 15 (b) Cat. 17: 1 Cat. 17: 2 Cat. 18: 1 Cat. 18: 2 Cat. 19: 1 (a) Cat. 19: 1 (b) Cat. 19: 2 (a) Cat. 19: 2 (b) Cat. 20: 1 Cat. 20: 2 (a) Cat. 20: 2 (b) Cat. 21 (a) Cat. 21 (b) Cat. 21 (c) Cat. 21 (d) Cat. 21 (e) Cat. 22 Cat. 24: 1 and 2 Cat. 25: 1 Cat. 25: 2 Cat. 25: 3 Cat. 25: 4

  7. A tortoiseshell male cat

    DEFF Research Database (Denmark)

    Pedersen, A. S.; Berg, Lise Charlotte; Almstrup, Kristian;

    2014-01-01

    Tortoiseshell coat color is normally restricted to female cats due to X-linkage of the gene that encodes the orange coat color. Tortoiseshell male cats do, however, occur at a low frequency among tortoiseshell cats because of chromosome aberrations similar to the Klinefelter syndrome in man...... tissue from a tortoiseshell male cat referred to us. Chromosome analysis using RBA-banding consistently revealed a 39,XXY karyotype. Histological examinations of testis biopsies from this cat showed degeneration of the tubules, hyperplasia of the interstitial tissue, and complete loss of germ cells....... Immunostaining using anti-vimentin and anti-VASA (DDX4) showed that only Sertoli cells and no germ cells were observed in the testicular tubules. As no sign of spermatogenesis was detected, we conclude that this is a classic case of a sterile, male tortoiseshell cat with a 39,XXY chromosome complement. © 2013 S...

  8. Standardized surgical approaches to ear surgery in rats

    Institute of Scientific and Technical Information of China (English)

    Peng Li; Dalian Ding; Kelei Gao; Richard Salvi

    2015-01-01

    Objective:To describe several approaches of ear surgeries for experimental studies in rats. Methods:Anesthetized rats were prepared for demonstration of various ear surgery approaches designed to optimize experimental outcomes in studies with specific goals and exposure requirements. The surgical approaches included the posterior tympanum, superior tympanum, inferior tympanum and occipital approaches. Results: The middle ear cavity and inner ear were successfully exposed from different angles via the mentioned surgical approaches. For example, electrode placement for recording of cochlear bioelectric responses was easily achieved through the posterior tympanum or inferior tympanum approach. Alternatively, drug delivery or gene transfection via round window membrane was most easily accomplished using the posterior tympanum approach. Cochlear perfusion of protective or ototoxic drugs was best performed using the inferior tympanum approach. Ossicular chain interruption to induce a prolonged conductive hearing loss was readily achieved using a superior tympanum approach. Lastly, surgical destruction of the endolymphatic sac to induce experimental endolymphatic hydrops was readily performed via an occipital surgical approach. Conclusion: These standardized surgical approaches can be applied in scientific studies of the ear with different purposes covering electro-physiology, conductive hearing loss, intra-cochlear drug perfusion and experimental studies relevant to Meniere's disease.

  9. Anatomical variants of surgical interest in inner ear pathology

    International Nuclear Information System (INIS)

    The study of the temporal bone by means of high-resolution computed tomography has had a great impact on the medical and surgical management of patients with middle ear pathology. In addition to making it possible to evaluate the disorder and determine its extension, ct aids in demonstrating the existence of morphological variants that can make the surgical approach enormously difficult. The operative knowledge of these variants allows the ear specialist to choose the most suitable surgical approach in each case (endaural, retro auricular mastoid or modifications of these strategies) and foresee the technical difficulties associated with the changes. We have considered the presence of lateral sinus procidentia, dehiscence or elevation of the jugular bulb, descent of the dura mater the middle cranial fossa and changes in the paths of the carotid artery and the facial nerve to be of surgical interest. (Author) 8 refs

  10. Management of obesity in cats

    Directory of Open Access Journals (Sweden)

    Hoelmkjaer KM

    2014-09-01

    Full Text Available Kirsten M Hoelmkjaer, Charlotte R Bjornvad Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark Abstract: Obesity is a common nutritional disorder in cats, especially when they are neutered and middle-aged. Obesity predisposes cats to several metabolic and clinical disorders, including insulin resistance, diabetes mellitus, lameness, and skin disease. Prevention and treatment of obesity is therefore of great importance in veterinary practice. Correct assessment of body composition is important for recognizing early states of obesity and for monitoring success of weight-loss programs. Various methods for assessing body composition have been proposed, of which a 9-point body-condition score has been validated in cats, and is possibly the most simple to use in the clinic; however, for extremely obese individuals, it is less useful. When calculating the appropriate daily caloric intake for a weight-loss plan, the aim is to maintain a safe weight-loss rate, increasing the chance of preserving lean body mass and decreasing the risk of developing hepatic lipidosis, while also producing a sufficient weight-loss rate to keep owners motivated. A weight-loss rate of 0.5%–2% per week is recommended, which for a cat that needs to lose 3 kg body weight results in an anticipated time for reaching the target weight of 24–60 weeks. There are several purpose-made weight-loss diets available. The optimal composition of a weight-loss diet for cats is unknown, but most of the available products have lower caloric density, an increased nutrient:energy ratio, and higher protein and fiber content. Regular follow-up visits allow the caloric intake to be adjusted based on progress, and possibly increase the chance of success. This review discusses the risk factors for and consequences of obesity, and gives directions for formulating a weight-loss plan, including daily caloric

  11. ENDOSCOPIC TYPMPANOMASTOID EXPLORATION [FUNCTIONAL ENDOSCOPIC EAR SURGERY-FEES

    OpenAIRE

    Sanjay Kumar; Muthukumar Ramamoorthy; Balasubramanian Thiagarajan

    2012-01-01

    Tympano mastoidectomy is usually performed using operating microscope. This study reports a case series of tympanomastoidectomy which was performed using an endoscope.Endoscopic Tympanomastoidectomy for atticoantral type of CSOM is an excellent technique for complete removal of cholesteatoma especially from inaccessible areas of middle ear cleft including facial recess, sinustympani Transmeatal removal of disease from mastoid antrum and even tip cells is possible with endoscopes. Preservation...

  12. Volumetric comparison of auditory brain nuclei in ear-tufted Araucanas with those in other chicken breeds.

    Science.gov (United States)

    Frahm, H D; Rehkämper, G

    1998-01-01

    Domestic chickens of the breed Araucana have ear-tufts, which affect the structure of the ear canal. Volumes of auditory brainstem nuclei were measured in three chicken breeds in order to evaluate whether the characteristics described for ear-tufted individuals of the Araucana chicken breed (alterations in the outer and middle ear anatomy) are associated with changes in the size of the relevant auditory nuclei. Allometric comparison reveals no size reductions of the angular, laminar and superior olivary nuclei in Araucanas, compared to Japanese Bantams and Brown Leghorns, but a slight increase in the size of the magnocellular nucleus. PMID:9672109

  13. Getting a CAT Scan

    Medline Plus

    Full Text Available ... Dictionary of Medical Words En Español What Other Kids Are Reading Movie: Digestive System Winter Sports: Sledding, ... Booger? Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A ...

  14. Getting a CAT Scan

    Medline Plus

    Full Text Available ... Skiing, Snowboarding, Skating Crushes What's a Booger? Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A A Text Size en español Obtención de ...

  15. Taking Care of Your Ears

    Science.gov (United States)

    ... your hands before touching your pierced ears. Applying rubbing alcohol also can help keep germs away. With an adult's help, soak a cotton ball in rubbing alcohol and apply it to both sides of the ...

  16. What Is an Ear Infection?

    Science.gov (United States)

    ... Quizzes Kids' Dictionary of Medical Words En Español What Other Kids Are Reading Back-to-School Butterflies? ... Got Homework? Here's Help White House Lunch Recipes What Is an Ear Infection? KidsHealth > For Kids > What ...

  17. Global Ear. Werke 2001 - 2006

    Index Scriptorium Estoniae

    2006-01-01

    Dresdenis muusikafestivalil "Global Ear" 23.3.03 esitusel Eesti heliloojate muusika: Helena Tulve "lumineux/opaque", Jaan Rääts "Meditation", Mirjam Tally "Aura", Mati Kuulberg "Sonate Nr.4", Mari Vihmand "Seitsmele"

  18. Keloid above the ear (image)

    Science.gov (United States)

    Keloids are overgrowths of scar tissue that follow skin injuries. Keloids may appear after such minor trauma as ear piercing. Dark skinned individuals tend to form keloids more readily than lighter skinned individuals.

  19. CAT questions and answers

    International Nuclear Information System (INIS)

    This document, prepared in February 1993, addresses the most common questions asked by APS Collaborative Access Teams (CATs). The answers represent the best judgment on the part of the APS at this time. In some cases, details are provided in separate documents to be supplied by the APS. Some of the answers are brief because details are not yet available. The questions are separated into five categories representing different aspects of CAT interactions with the APS: (1) Memorandum of Understanding (MOU), (2) CAT Beamline Review and Construction, (3) CAT Beamline Safety, (4) CAT Beamline Operations, and (5) Miscellaneous. The APS plans to generate similar documents as needed to both address new questions and clarify answers to present questions

  20. Learning strategies in ear training

    OpenAIRE

    Blix, Hilde Synnøve

    2014-01-01

    The purpose of this article is to discuss learning strategies in ear training, and the aim is to explore how focusing on the ways the students learn can provide valuable information about learning and teaching ear training. The article will review present knowledge about learning strategies across fields of research. Literature regarding studies of strategies in music acquisition, and strategy use in expert performance will be described. It is argued that studies of learning strategies requir...

  1. Inner Ear Barotrauma After Underwater Pool Competency Training Without the Use of Compressed Air Case and Review.

    Science.gov (United States)

    McIntire, Sean; Boujie, Lee

    2016-01-01

    Inner ear barotrauma can occur when the gas-filled chambers of the ear have difficulty equalizing pressure with the outside environment after changes in ambient pressure. This can transpire even with small pressure changes. Hypobaric or hyperbaric environments can place significant stress on the structures of the middle and inner ear. If methods to equalize pressure between the middle ear and other connected gas-filled spaces (i.e., Valsalva maneuver) are unsuccessful, middle ear overpressurization can occur. This force can be transmitted to the fluid-filled inner ear, making it susceptible to injury. Damage specifically to the structures of the vestibulocochlear system can lead to symptoms of vertigo, hearing loss, and tinnitus. This article discusses the case of a 23-year-old male Marine who presented with symptoms of nausea and gait instability after performing underwater pool competency exercises to a maximum depth of 13 feet, without breathing compressed air. Diagnosis and management of inner ear barotrauma are reviewed, as is differentiation from inner ear decompression sickness. PMID:27450603

  2. A Survey on Human Ear Recognition

    OpenAIRE

    Suvarnsing Bhable; Sangramsing Kayte,

    2015-01-01

    This paper presents an efficient ear recognition technique which derives benefits from the local features of the ear and attempt to handle the problems due to pose, poor contrast, change in illumination and lack of registration. Recognizing humans by their ear have recently received significant attention in the field of research. Ear is the rich in characteristics. This paper provides a detailed survey of research done in ear detection and recognition. This survey paper is very us...

  3. 3D printed bionic ears.

    Science.gov (United States)

    Mannoor, Manu S; Jiang, Ziwen; James, Teena; Kong, Yong Lin; Malatesta, Karen A; Soboyejo, Winston O; Verma, Naveen; Gracias, David H; McAlpine, Michael C

    2013-06-12

    The ability to three-dimensionally interweave biological tissue with functional electronics could enable the creation of bionic organs possessing enhanced functionalities over their human counterparts. Conventional electronic devices are inherently two-dimensional, preventing seamless multidimensional integration with synthetic biology, as the processes and materials are very different. Here, we present a novel strategy for overcoming these difficulties via additive manufacturing of biological cells with structural and nanoparticle derived electronic elements. As a proof of concept, we generated a bionic ear via 3D printing of a cell-seeded hydrogel matrix in the anatomic geometry of a human ear, along with an intertwined conducting polymer consisting of infused silver nanoparticles. This allowed for in vitro culturing of cartilage tissue around an inductive coil antenna in the ear, which subsequently enables readout of inductively-coupled signals from cochlea-shaped electrodes. The printed ear exhibits enhanced auditory sensing for radio frequency reception, and complementary left and right ears can listen to stereo audio music. Overall, our approach suggests a means to intricately merge biologic and nanoelectronic functionalities via 3D printing. PMID:23635097

  4. StreamCat

    Data.gov (United States)

    U.S. Environmental Protection Agency — The StreamCat Dataset provides summaries of natural and anthropogenic landscape features for ~2.65 million streams, and their associated catchments, within the...

  5. Haemobartonellosis in Van Cats

    OpenAIRE

    AKKAN, Hasan Altan; Karaca, Mehmet; TÜTÜNCÜ, Mehmet

    2005-01-01

    The present study was conducted to determine prevalence of Haemobartonella felis in Van cats. 121 Van cats (82 female, 39 male, aged 1-9 years) were the materials of the study. To determine biochemical and haematological parameters, 2 ml blood with and without anticoagulant were taken according to technique from vena cephalica antebrachii. H. felis was detected in blood smears preparations of 18 (14.88%) by Papenheim staining. Among biochemical parameters aspartate amino transferase (AST), al...

  6. Resolving Schrodinger's cat

    OpenAIRE

    Hobson, Art

    2016-01-01

    Schrodinger's famous cat has long been misunderstood. According to quantum theory and experiments with entangled systems, an entangled state such as the Schrodinger's cat state is neither a superposition of states of either subsystem nor a superposition of compound states of the composite system, but rather a nonlocal superposition of correlations between pairs of states of the two subsystems. The entangled post-measurement state that results from an ideal measurement is not paradoxical, but ...

  7. Cardiac Biomarkers in Hyperthyroid Cats

    OpenAIRE

    Sangster, Jodi Kirsten

    2013-01-01

    Background: Hyperthyroidism has substantial effects on the circulatory system. The cardiac biomarkers NT-proBNP and troponin I (cTNI) have proven useful in identifying cats with myocardial disease but have not been as extensively investigated in hyperthyroidism.Hypothesis: Plasma NT-proBNP and cTNI concentrations are higher in cats with primary cardiac disease than in cats with hyperthyroidism and higher in cats with hyperthyroidism than in healthy control cats.Animals: Twenty-three hyperthyr...

  8. Cardiac Biomarkers in Hyperthyroid Cats

    OpenAIRE

    Sangster, J.K.; Panciera, D L; Abbott, J.A.; Zimmerman, K.C.; Lantis, A.C.

    2013-01-01

    Background Hyperthyroidism has substantial effects on the circulatory system. The cardiac biomarkers NT‐proBNP and troponin I (cTNI) have proven useful in identifying cats with myocardial disease but have not been extensively investigated in hyperthyroidism. Hypothesis Plasma NT‐proBNP and cTNI concentrations are higher in cats with primary myocardial disease than in cats with hyperthyroidism and higher in cats with hyperthyroidism than in healthy control cats. Animals Twenty‐three hyperthyro...

  9. In-the-Ear Hearing-Instrument Antenna for ISM-Band Body-Centric Ear-to-Ear Communications

    DEFF Research Database (Denmark)

    Yatman, William H.; Larsen, Lauge K; Kvist, Søren Helstrup; Thaysen, Jesper; Jakobsen, Kaj Bjarne

    2012-01-01

    A compact 2.45 GHz slot-loop antenna is implemented for the use in the outer shell of an in-the-ear (ITE) hearing instrument (HI). The antenna is optimized for high ear-to-ear path gain (jS21j). The antenna simulation results are presented for two identical antennas, one placed in the center of...... each ear. A simulated path gain of 􀀀75.0 dB is obtained....

  10. Numerical evaluation of implantable hearing devices using a finite element model of human ear considering viscoelastic properties.

    Science.gov (United States)

    Zhang, Jing; Tian, Jiabin; Ta, Na; Huang, Xinsheng; Rao, Zhushi

    2016-08-01

    Finite element method was employed in this study to analyze the change in performance of implantable hearing devices due to the consideration of soft tissues' viscoelasticity. An integrated finite element model of human ear including the external ear, middle ear and inner ear was first developed via reverse engineering and analyzed by acoustic-structure-fluid coupling. Viscoelastic properties of soft tissues in the middle ear were taken into consideration in this model. The model-derived dynamic responses including middle ear and cochlea functions showed a better agreement with experimental data at high frequencies above 3000 Hz than the Rayleigh-type damping. On this basis, a coupled finite element model consisting of the human ear and a piezoelectric actuator attached to the long process of incus was further constructed. Based on the electromechanical coupling analysis, equivalent sound pressure and power consumption of the actuator corresponding to viscoelasticity and Rayleigh damping were calculated using this model. The analytical results showed that the implant performance of the actuator evaluated using a finite element model considering viscoelastic properties gives a lower output above about 3 kHz than does Rayleigh damping model. Finite element model considering viscoelastic properties was more accurate to numerically evaluate implantable hearing devices. PMID:27276992

  11. Mucolipidosis type II in a domestic shorthair cat

    International Nuclear Information System (INIS)

    A seven-month-old, female domestic shorthair cat was presented to the Veterinary Teaching Hospital, University of Zurich, with abnormal facial features, retarded growth and progressive hindlimb paresis. On physical examination the cat had a flat, broad face with hypertelorism, frontal bossing, small ears and thickened upper and lower eyelids. The corneas of both eyes were clear and the pupils were dilated. The skin was generally thickened, most prominently on the dorsal aspect of the neck. Radiography of the entire skeleton revealed a severely deformed spinal column, bilateral hip luxation with hip dysplasia, an abnormally shaped skull and generalised decreased bone opacity. The clinical features and radiographic changes were suggestive of mucopolysaccharidosis. The toluidine blue spot test on a urine sample, however, was negative for glycosaminoglycans. Further biochemical investigations revealed a deficiency of the enzyme N-acetylglucosamine-1-phosphotransferase (GlcNAc-phosphotransferase, EC 2.7.8.17) in peripheral leukocytes and an elevation of many lysosomal enzymes in the serum of the cat which is diagnostic for mucolipidosis type II. Histology and electron microscopy of different tissues are briefly summarised. The findings of this cat, the first reported case of mucolipidosis type II are compared with other similar storage diseases described in the cat

  12. Hyaluronic acid liposomal gel sustains delivery of a corticoid to the inner ear.

    Science.gov (United States)

    El Kechai, Naila; Mamelle, Elisabeth; Nguyen, Yann; Huang, Nicolas; Nicolas, Valérie; Chaminade, Pierre; Yen-Nicolaÿ, Stéphanie; Gueutin, Claire; Granger, Benjamin; Ferrary, Evelyne; Agnely, Florence; Bochot, Amélie

    2016-03-28

    The inner ear is one of the most challenging organs for drug delivery, mainly because of the blood-perilymph barrier. Therefore, local rather than systemic drug delivery methods are being developed for inner ear therapy. In this work, we have evaluated the benefit of a hyaluronic acid liposomal gel for sustained delivery of a corticoid to the inner ear after local injection into the middle ear in a guinea pig model. The liposomal gel was easily injectable as a result of the shear-thinning behavior of hyaluronic acid. A prolonged residence time at the site of injection as well as in the round window were achieved without any negative effect on the hearing thresholds of the animals. The presence of liposomes in the formulation resulted in sustained release of the drug in the perilymph for 30days and promoted the conversion of the prodrug loaded within the liposomes (dexamethasone phosphate) into its active form (dexamethasone). In this way, therapeutic doses were attained in the perilymph. A small amount of intact liposomes was visualized in the perilymph, whereas the main proportion of liposomes seemed to be trapped in the round window resulting in a reservoir effect. Thus, the administration of hyaluronic acid liposomal gel to the middle ear is an efficient strategy for delivering corticoids to the inner ear in a sustained manner. PMID:26860286

  13. Biomechanical and neurophysiological studies on audition in eared and earless harlequin frogs (Atelopus).

    Science.gov (United States)

    Lindquist, E D; Hetherington, T E; Volman, S F

    1998-08-01

    Tissue displacement of various body surfaces and the auditory midbrain sensitivities to sound were measured in Atelopus species with or without a tympanic middle ear ("eared" and "earless", respectively). Tissue displacement (vibration) of body regions was measured by laser Doppler vibrometer. The body wall directly overlying the lung is most dramatically displaced by sound pressure in all species tested. The otic (lateral head) region showed low displacement in earless species, but significant displacement to high-frequency sound in eared species. Peak tissue displacement of the body wall occurred within the frequency range of each species' advertisement vocalization. Peak tissue displacement of the otic region of the eared species also occurred within these frequencies. Multi-unit neurophysiological recordings of the auditory midbrain (torus semicircularis) also were obtained. Auditory sensitivity curves showed three distinct regions of sensitivity at low, middle, and high frequencies, the latter located within the frequency range of each species' advertisement vocalization. The correlation between auditory midbrain sensitivity and tissue displacement of the body wall region at advertisement vocalization frequencies, suggests that the body wall/lungs serve as the route of sound transfer to the inner ear in earless species and possibly in the eared species as well. PMID:9693994

  14. Infant Ear Infections Becoming Less Common

    Science.gov (United States)

    ... nih.gov/medlineplus/news/fullstory_158002.html Infant Ear Infections Becoming Less Common Just under half of ... 2016 MONDAY, March 28, 2016 (HealthDay News) -- Painful ear infections remain a scourge of childhood, but fewer ...

  15. DESING OF CYLINDIRICAL EAR OF POLISH

    Directory of Open Access Journals (Sweden)

    Yaşar KARAGÖZ

    2000-02-01

    Full Text Available Plough is an agricultural tool which is used for preparing land to male it ready for sowing. The funotion of lough is to break the compact land into small pieces and to allow a suitable condition for living of culture plants. The ear is the most important part of active plough surface. The geometrical form of ear determines the form of active surface together with the front iron tip. Ploughs are divided into two categories which are European and American types. There are important differencies betucen the European and American tyges with respect to ?, ß and ? angles. Gorjatschkin described the ear form of European ploughs under four main groups which are: 1. Cylindirical ear type, 2. Culture-form ear type, 3. Semi-curled ear type, 4. Curled ear type. In this work, the designing of cylindirical ear was studied.

  16. Proteomics and the Inner Ear

    Directory of Open Access Journals (Sweden)

    Isolde Thalmann

    2001-01-01

    Full Text Available The inner ear, one of the most complex organs, contains within its bony shell three sensory systems, the evolutionary oldest gravity receptor system, the three semicircular canals for the detection of angular acceleration, and the auditory system - unrivaled in sensitivity and frequency discrimination. All three systems are susceptible to a host of afflictions affecting the quality of life for all of us. In the first part of this review we present an introduction to the milestones of inner ear research to pave the way for understanding the complexities of a proteomics approach to the ear. Minute sensory structures, surrounded by large fluid spaces and a hard bony shell, pose extreme challenges to the ear researcher. In spite of these obstacles, a powerful preparatory technique was developed, whereby precisely defined microscopic tissue elements can be isolated and analyzed, while maintaining the biochemical state representative of the in vivo conditions. The second part consists of a discussion of proteomics as a tool in the elucidation of basic and pathologic mechanisms, diagnosis of disease, as well as treatment. Examples are the organ of Corti proteins OCP1 and OCP2, oncomodulin, a highly specific calcium-binding protein, and several disease entities, Meniere's disease, benign paroxysmal positional vertigo, and perilymphatic fistula.

  17. Ear biometrics in 2D and 3D localization and recognition

    CERN Document Server

    Prakash, Surya

    2015-01-01

    This book presents the state-of-the-art techniques and recent research progress on Ear Biometrics. Among the various physiological traits, the reasons for the ear to gain much attention in recent years are many folds. It has been found to be a reliable biometrics for human verification and identification. Ears are remarkably consistent and unlike face, it does not change shape with different expressions or age, and remain fixed in the middle of the side of the head against a predictable background. The book contains figures, tables and plots to illustrate the techniques in an easy and lucid manner. The book also provides an extensive literature on the subject, where readers have the benefit of receiving all the relevant material at one place in a very comprehensive manner. This book caters students, academics, researchers, practitioners who are interested in the field of Ear Biometrics and its applications in face recognition and security.

  18. The ear growth and productivity of Triticum aestivum L. under different mineral nutrition

    Directory of Open Access Journals (Sweden)

    Olga I. Zhuk

    2016-06-01

    Full Text Available The growth of winter wheat ear was studied under optimal and deficit support of main mineral nutrition elements – nitrogen, phosphor and potassium. It is shown that mineral nutrition deficit caused the completing of ear growth prematurely and reduced ear length in cultivars ‘Mironіvska 808’ and ‘Favoritka’. Nutrition deficit decreased ear mass of main and side stem, mass of big and middle grains, grain mass in ear. It is detected reducing of lower spikelets in wheat cultivars ‘Mironіvska 808’ and ‘Favoritka’ under nutrition deficit that caused decreasing quantity of spikelets and grains in ear. Period of ear growth in both investigated cultivars was equal in optimal conditions that was determined by the same duration of ontogenesis phasis. Deficit of mineral nutrition accelerated the plant germination but decreased the grain fullness in cultivar ‘Mironіvska 808’. Mature grains in cultivar ‘Favoritka’ were fulfilled even under mineral nutrition deficit conditions.

  19. Can Loud Music Hurt My Ears?

    Science.gov (United States)

    ... Here's Help White House Lunch Recipes Can Loud Music Hurt My Ears? KidsHealth > For Kids > Can Loud Music Hurt My Ears? Print A A A Text ... up? Oh! You want to know if loud music can hurt your ears . Are you asking because ...

  20. 21 CFR 878.3590 - Ear prosthesis.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Ear prosthesis. 878.3590 Section 878.3590 Food and... GENERAL AND PLASTIC SURGERY DEVICES Prosthetic Devices § 878.3590 Ear prosthesis. (a) Identification. An ear prosthesis is a silicone rubber solid device intended to be implanted to reconstruct the...

  1. An Analysis of the Acoustic Input Impedance of the Ear

    OpenAIRE

    Withnell, Robert H.; Gowdy, Lauren E.

    2013-01-01

    Ear canal acoustics was examined using a one-dimensional lossy transmission line with a distributed load impedance to model the ear. The acoustic input impedance of the ear was derived from sound pressure measurements in the ear canal of healthy human ears. A nonlinear least squares fit of the model to data generated estimates for ear canal radius, ear canal length, and quantified the resistance that would produce transmission losses. Derivation of ear canal radius has application to quantify...

  2. E-Z-CAT

    International Nuclear Information System (INIS)

    A new barium sulphate suspension, E-Z-CAT, for use as an oral contrast medium at computed tomography of the abdomen has been compared with the commonly used water-soluble iodinated contrast medium Gastrografin as regards patient tolerance and diagnostic information. The investigation was conducted as an unpaired randomized single-blind study in 100 consecutive patients. E-Z-CAT seems to be preferred because of its better taste, its lesser tendency to cause diarrhoea, and for usage in patients who are known to be hypersensitive to iodinated contrast media. The diagnostic information was the same for both contrast media. (Auth.)

  3. Clinical analysis of ear carcinoma treated in the Department of Otolaryngology, Niigata University Hospital. Focus on correlation between treatment method and prognosis

    International Nuclear Information System (INIS)

    Thirty-six patients of ear carcinoma treated in our department were clinically analyzed. Those ear carcinoma patients accounted for 3.5% of all head and neck carcinoma patients. The most common primary site was the external auditory canal (67%), followed by the middle ear (19%) and the auricle (14%). The mean age of the patients was 66 years old, and the male to female ratio was 3:2. The most common chief complaint of the external auditory canal and middle ear carcinoma was otorrhea followed by ear itching and ear ache. Of patients with external auditory canal carcinoma and middle ear carcinoma, 26% had a history of ear surgery, and 35% had a habit of ear-picking. Histopathologically, 94% of the patients were squamous cell carcinoma, and 6% were malignant melanoma. Sixty-two % of squamous cell carcinoma patients underwent surgery, and the remaining 38% had radiotherapy without surgery. Postoperative radiotherapy was added for 67% of the surgery group. Five-year survival rates of the patients with squamous cell carcinoma were 74% for external auditory canal carcinoma, 67% for auricular carcinoma, and 34% for middle ear carcinoma, respectively. The five-year survival rate of the surgery group was 82%, and that of the non-surgery group was 29%. There was a statistical significance between the two groups. No statistical significance was seen between with and without postoperative radiotherapy. In the treatment of squamous cell carcinoma in the ear, radical en bloc surgery followed by postoperative radiotherapy was considered to be an appropriate treatment strategy. (author)

  4. A Survey on Human Ear Recognition

    Directory of Open Access Journals (Sweden)

    Suvarnsing Bhable

    2015-11-01

    Full Text Available This paper presents an efficient ear recognition technique which derives benefits from the local features of the ear and attempt to handle the problems due to pose, poor contrast, change in illumination and lack of registration. Recognizing humans by their ear have recently received significant attention in the field of research. Ear is the rich in characteristics. This paper provides a detailed survey of research done in ear detection and recognition. This survey paper is very useful in the current state-of- art for those who are working in this area and also for those who might exploit this new approach.

  5. ServCat Sensitivity Guidelines

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This guide covers sensitivity in ServCat. This document provides technical guidance on how sensitivity fields work in ServCat, and provides suggestions on what...

  6. Cat Scratch Disease (For Parents)

    Science.gov (United States)

    ... Tropical Delight: Melon Smoothie Pregnant? Your Baby's Growth Cat Scratch Disease KidsHealth > For Parents > Cat Scratch Disease Print A A A Text Size ... Doctor en español Enfermedad por arañazo de gato Cat scratch disease is a bacterial infection that a ...

  7. Tracheal collapse in two cats

    International Nuclear Information System (INIS)

    Two cats examined bronchoscopically to discover the cause of tracheal collapse were found to have tracheal obstruction cranial to the collapse. Cats with this unusual sign should be examined bronchoscopically to ascertain whether there is an obstruction, as the cause in these 2 cats was distinct from the diffuse airway abnormality that causes tracheal collapse in dogs

  8. Membranous nephropathy in sibling cats.

    Science.gov (United States)

    Nash, A S; Wright, N G

    1983-08-20

    Membranous nephropathy was diagnosed in two sibling cats from the same household. Both cases presented with the nephrotic syndrome but 33 months elapsed before the second cat became ill, by which time the first cat had been in full clinical remission for over a year. PMID:6623883

  9. Taxonomy Icon Data: domestic cat [Taxonomy Icon

    Lifescience Database Archive (English)

    Full Text Available domestic cat ... Felis silvestris cat us Chordata/Vertebrata/Mammalia/Theria/Eutheria/Carnivora Felis ... _silvestris_cat us_L.png Felis_silvestris_cat us_NL.png Felis_silves ... tris_cat us_S.png Felis_silvestris_cat us_NS.png http://biosc ...

  10. Inner Time and Inner Ear

    CERN Document Server

    Rvachov, Michael

    2012-01-01

    Sounds are information sequences that cannot exist outside of a time base and therefore cannot be analyzed inside an animal without an accurate internal clock. It is suggested that the clock may be hidden in the inner ear. It is shown that if a mechanism of counting of the electrical charge passing through the inner ear hair cells exists then the mechanism can be used both for the conversion of acceleration into velocity and as the inner clock, in the presence of a constant current. The causes of vertigo during rotation are discussed. It is shown that if a continuous inner time exists then sleeping is a mathematical necessity. It is indicated that both for visual and hearing inputs the recognition of an input signal is recognition of function(s) of two variables.

  11. Imaging of the inner ear

    International Nuclear Information System (INIS)

    New computed tomography (CT) and magnetic resonance (MR) techniques allow more detailed anatomic studies of the inner ear. CT is still the best technique to study patients with fractures, congenital malformations and otodystrophies involving the inner ear. During recent years MR imaging has emerged as an excellent method to detect pathology in the internal auditory canal, membranous labyrinth and bony labyrinth and to characterize petrous apex lesions. MR has even proved its value in patients with fractures and congenital malformations making the diagnosis of, for instance, labyrinthine concussion and absence of the vestibulocochlear nerve possible. The diagnosis of acute/chronic labyrinthitis and intralabyrinthine tumors has also became possible. However, MR and CT are often complementary, as is the case in patients with mixed hearing loss, congenital malformations and petrous apex lesions. (orig.)

  12. Getting a CAT Scan

    Medline Plus

    Full Text Available ... More Quizzes Kids' Dictionary of Medical Words En Español What Other Kids Are Reading Back-to-School ... Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands ...

  13. Chemodectoma in a cat

    International Nuclear Information System (INIS)

    A 10-year-old, spayed female, domestic shorthair cat was presented for evaluation of a thoracic mass. Radiographs demonstrated a 4 by 5-cm mass dorsal to the heart. Cytology of specimens obtained by ultrasound-guided needle aspiration was compatible with a neuroendocrine tumor. Scintigraphy, thoracic exploratory, and histology were used to identify the mass as an aortic body chemodectoma

  14. Coxofemoral luxations in cats

    International Nuclear Information System (INIS)

    In a retrospective study, 79 untreated luxations of the coxofemoral joint in cats were recorded over a 12-year period. Twenty-nine of these cases were available for follow-up, of which 13 were re-examined clinically and radiologically. It was found that the maximum incidence of the injury occurred from one to three years of age. Follow-up radiographs showed that the cats had developed nearthroses of various degrees located dorsally on the ilium. The degree of nearthrosis formation was not consistently correlated with the length of the observation time. Radiological signs of decreased bone density of the proximal femur may be caused by reduced weightbearing related to changes in biomechanical function and altered blood supply in the luxated limb. Almost two-thirds of the re-examined animals presented some kind of locomotor dysfunction on clinical examination. Limb function improved with time. The best clinical results appeared to be in cats that were immature at the time of injury and developed nearthrosis similar to a normal coxofemoral joint. All the cats available to this study showed acceptable functional results and had a normal level of activity according to the owners

  15. Getting a CAT Scan

    Medline Plus

    Full Text Available ... More Quizzes Kids' Dictionary of Medical Words En Español What Other Kids Are Reading Movie: Digestive System ... Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands ...

  16. The Fishing Cat

    Institute of Scientific and Technical Information of China (English)

    孙雅飞; 乐伟国

    2008-01-01

    @@ 一、故事内容 A cat goes fishing every day. He wants to eat fish, but he can't catch any fish. One day, he goes to the river as usual. Suddenly, a fish comes out. He catches the fish and putsthe fish in the basket. He's very happy, but he forgest to put the lid on the basket.

  17. Oligopsonistic Cats and Dogs

    OpenAIRE

    Dewit, Dr. Gerda; Leahy, Dr. Dermot

    2005-01-01

    We study the strategic investment behaviour of oligopsonistic rivals in the labour market. Under wage competition, firms play "puppy dog" with productivityaugmenting investment and "fat cat" with supply-enhancing investment. Under employment competition, investing strategically always involves playing "top dog".

  18. Our experience of unsafe ear

    Directory of Open Access Journals (Sweden)

    Nagendran Navaneethan

    2015-01-01

    Full Text Available Aim: To evaluate the commonest presentation and intraoperative findings and significant post operative challenges in patients who underwent modified radical mastoidectomy in Melmaruvathur adhiparasakthi Institute of medical sciences and research. Design: Retrospective study. Materials and Methods: Fifty six patients who underwent modified radical mastoidectomy for unsafe ear disease were included in this study. The study period was from 2009 to 2012.The commonest presentation was evaluated with the history taken from the patient′s records. The intraoperative evaluation of primary pathology and its anatomic extension and ossicular status were identified. Common problems we faced postoperatively were documented. Results: Of the 56 patients,thirty eight(68% were male and eighteen(32% were female. The age ranged from nine years -fifty years of age. The commonest presentation in this study was foul smelling scanty discharge (75% and the primary pathology was isolated cholesteatoma (54%. The involvement of mesotympanum, attic, aditus & antrum with primary disease was more than the isolated involvement of attic,aditus and antrum. Stapes erosion was more common than incus erosion in our study. We faced a very rare postoperative complication of delayed facial palsy in one patient who had no facial nerve dehiscence. Conclusion: Good attention given to patients with infrequent, minimal ear discharge helps to identify unsafe ear. In unsafe ear, otologists should be well prepared to face the stapes erosion during surgery. Even though rare, otologists should be aware of delayed facial palsy and be cautious about the past history of herpes simplex and varizella infection and consider antiviral prophylaxis before surgery.

  19. Prostatic carcinoma in two cats

    International Nuclear Information System (INIS)

    Clinical, radiological and pathological features of two cats with prostatic carcinoma are reported. In both cats the presenting history included signs of lower urinary tract disease with haematuria and dysuria. Prostatomegaly was visible radiographically in one cat; an irregular intraprostatic urethra was seen on retrograde contrast urethrography in both cats. In one of the cats, neoplasia was suspected on the basis of a transurethral catheter biopsy. Following a poor response to palliative treatment in both cases, euthanasia was performed with histological confirmation of the diagnosis

  20. The Cat nRules

    CERN Document Server

    Mould, R A

    2004-01-01

    The nRules that are developed in another paper are applied to two versions of the Schrodinger cat experiment. In version I the initially conscious cat is made unconscious by a mechanism that is initiated by a radioactive decay. In version II the initially unconscious cat is awakened by a mechanism that is initiated by a radioactive decay. In both cases an observer is permitted to check the statues of the cat at any time during the experiment. In all cases the nRules correctly and unambiguously predict the conscious experience of the cat and the observer. Keywords: brain states of observer, stochastic choice, state reduction, wave collapse.

  1. Genetic testing in domestic cats.

    Science.gov (United States)

    Lyons, Leslie A

    2012-12-01

    Varieties of genetic tests are currently available for the domestic cat that support veterinary health care, breed management, species identification, and forensic investigations. Approximately thirty-five genes contain over fifty mutations that cause feline health problems or alterations in the cat's appearance. Specific genes, such as sweet and drug receptors, have been knocked-out of Felidae during evolution and can be used along with mtDNA markers for species identification. Both STR and SNP panels differentiate cat race, breed, and individual identity, as well as gender-specific markers to determine sex of an individual. Cat genetic tests are common offerings for commercial laboratories, allowing both the veterinary clinician and the private owner to obtain DNA test results. This article will review the genetic tests for the domestic cat, and their various applications in different fields of science. Highlighted are genetic tests specific to the individual cat, which are a part of the cat's genome. PMID:22546621

  2. Emerging and Re-Emerging Zoonoses of Dogs and Cats

    OpenAIRE

    Chomel, Bruno B.

    2014-01-01

    Simple Summary Dogs and cats have been sharing our environment for a long time and as pets they bring major psychological well-being to our modern urbanized society. However, they still can be a source of human infection by various pathogens, including viruses, bacteria, parasites, and fungi. Abstract Since the middle of the 20th century, pets are more frequently considered as “family members” within households. However, cats and dogs still can be a source of human infection by various zoonot...

  3. Imunoexpressão da citoqueratina 16 e do antígeno nuclear Ki-67 no colesteatoma adquirido da orelha média Expression patterns of cytokeratin 16 and the nuclear antigen Ki-67 in acquired middle ear cholesteatoma

    Directory of Open Access Journals (Sweden)

    Celina S. B. Pereira

    2002-08-01

    Full Text Available Introdução: Ocolesteatoma da orelha média é caracterizado pela presença de epitélio escamoso estratificado queratinizado nesta cavidade, causando destruição óssea e podendo levar a complicações. Algumas substâncias como a citoqueratina 16 e o Ki-67, marcadores de proliferação celular, vêm sendo utilizadas para estudar essa doença. A CK 16 é um filamento protéico, situado no citoplasma das células epiteliais, característico de epitélios hiperproliferativos. O Ki-67 é um antígeno nuclear que aparece nas células em estágio de proliferação. Objetivo: O objetivo deste trabalho foi estudar a imunoexpressão da CK 16 e do Ki-67 no colesteatoma adquirido. Forma de estudo: Clínico prospectivo. Material e Método: Foram colhidas amostras de colesteatoma de 31 pacientes submetidos à cirurgia otológica, sendo 20 adultos e 11 crianças, no período de 1998 e 2000. Essas amostras foram submetidas à análise histológica e imuno-histoquímica para estudo da expressão da CK 16 e do Ki-67 na matriz do colesteatoma. Resultado: A análise dos resultados mostrou a presença da CK 16 nas camadas suprabasais da matriz do colesteatoma e, do Ki-67, na camada basal, estendendo-se para as camadas suprabasais e, inclusive, para a camada apical da matriz. A reação aos anticorpos anti-CK 16 e Ki-67 foi heterogênea. A correlação entre a CK 16 e o Ki-67 suprabasal com variáveis morfológicas, como acantose do epitélio e hiperplasia da camada basal formando cones epiteliais em direção à perimatriz, foi positiva e significativa. Também houve relação positiva e significativa entre a CK 16 e o Ki-67 suprabasal e apical. Conclusão: Esses resultados permitem concluir que o colesteatoma tem características hiperproliferativas, expressando a CK 16 e o Ki-67 na sua matriz.Introduction: Cholesteatomas of the middle ear are characterized by the presence of stratified squamous epithelium in this cavity presenting with highly invasive

  4. Prominent ears: Anthropometric study of the external ear of primary school children of Harare, Zimbabwe

    Science.gov (United States)

    Muteweye, Wilfred; Muguti, Godfrey I.

    2015-01-01

    Background Prominent ear is the most common congenital ear deformity affecting 5% of children in the Western world and has profound psychosocial effects on the bearer. It is important to know the prevalence in the local population to have a better appreciation of the local burden of the abnormality as well as to know the parameters of ear morphology locally. These parameters can be useful in the diagnosis and evaluation of ear anomalies and may help reconstructive surgeons in reproducing an anatomically correct ear of an African/Zimbabwean child. Objectives To evaluate the frequency of prominent ears in black school going children in Zimbabwe and to establish morphometric properties of the ear. Design Prospective observational, cross sectional study. Setting Three Primary schools in Harare. Two in a high density area and one in a low density area. Materials and methods Three Primary schools in Harare were selected at random. The following measurements were taken: ear lengths, ear projection and face height using a sliding caliper. Three hundred and five healthy pupils of the age range 9–13 years of both sexes were included in the study, whilst children with congenital anomalies, ear tumours and history of ear trauma were excluded. Results The mean ear height across the cohort was 56.95 ± 5.00 (right ear) and 56.86 ± 4.92 (left ear). Ear projection was 19.52 ± 2.14 (right ear) and 19.59 ± 2.09 (left ear). Gender related differences were noted. Mean ear height was significantly higher in males (p-value = 0.000). Ear projection was higher in males compared to females. A total of 6.89% had prominent ears. Among males, 7.69% had prominent ears whilst 6.17% of females had prominent ears. Conclusion The prevalence of prominent ear among black African children in the studied population is comparable to that of Caucasians. The study provides a set of biometric data of auricular dimensions for normal black African children aged 9–13 years. PMID:26468372

  5. CT and MR imaging of congenital abnormalities of the inner ear and internal auditory canal

    International Nuclear Information System (INIS)

    The embryology of the inner ear must be known as many of the inner ear malformations present as a result of the arrest during the various stages of embryology. These malformations are described in this 'embryologic' perspective and specific names for certain malformations are no longer used. Both CT and MR can be used to look at inner ear malformations but often both techniques are complementary. However, CT is preferred when associated middle- or external ear malformations must be excluded. Magnetic resonance is preferred when subtle changes in the membranous labyrinth or abnormalities of the nerves in the internal auditory canal must be visualised. The CT and MR technique must however be adapted as more and more subtle congenital malformations can only be seen when the right technique is used. The heavily T2-weighted gradient-echo or fast spin-echo MR techniques are mandatory if malformations of the inner ear must be excluded. The purpose of this paper is to describe the techniques used to study these patients and to give an overview of the most frequent and important congenital malformations which can be found in the inner ear and internal auditory canal/cerebellopontine angle

  6. Preoperative diagnosis and surgical strategy in congenital auditory ossicular malformation of 26 ears

    International Nuclear Information System (INIS)

    We retrospectively analyzed 26 ears of 21 subjects having auditory ossicular malformation and who had undergone auditory reconstruction between April 2004 and December 2010 at our clinic. We checked preoperative condition, pathological classification, surgical procedure, and hearing improvement. We could predict pathological conditions precisely from preoperative computed tomography (CT), including incudostapedial disconnection (9/12, 75%) and malleus and/or incus fixation (7/12, 58%), which tended to be present in external ear malformation, and stapes footplate fixation (0/12, 0%). We could not, however, predict complex malformation (0/8, 0%). Overall success was 90% (18/20) in the 20 ears observed for at least 1 year. In the 2 ears without improved hearing, the first had congenital cholesteatoma and no stapes superstructure, was treated with type IV tympanoplasty. The second had malleus, incus, and stapes fixation and discontinuity between the incus and stapes, and was treated with type III tympanoplasty and stapes mobilization. Preoperative diagnosis is difficult in mixed congenital auditory ossicular malformation, especially stapes footplate fixation, possibly requiring unexpected procedures, with a poor hearing outcome. Preoperative status must thus be evaluated precisely using hearing, tympanometry, acoustic reflex test, and CT. Temporal bone CT and external ear findings are useful in diagnosing middle-ear malformation. Subjects' informed consent should also be obtained due to the possible need for changing procedure based on findings during surgery. (author)

  7. Management of Otic and Nasopharyngeal, and Nasal Polyps in Cats and Dogs.

    Science.gov (United States)

    Greci, Valentina; Mortellaro, Carlo Maria

    2016-07-01

    Feline inflammatory polyps are the most common nonneoplastic lesion of ear and nasopharynx in cats. Minimally invasive techniques for polyp removal, such as traction avulsion combined with curettage of the tympanic cavity and per-endoscopic transtympanic traction, have been successful for long-term resolution. Feline nasal hamartomas are benign lesions of the nasopharynx, and most have a good prognosis after surgical removal. Canine aural and nasopharyngeal inflammatory polyps are rare and have a similar clinical presentation as cats with these lesions. In dogs, it is important to achieve an accurate histologic diagnosis of these masses before appropriate surgical treatment can be planned. PMID:26947114

  8. Attenuation of ear muffs in Canadian mines

    Energy Technology Data Exchange (ETDEWEB)

    Savich, M.U.

    1979-12-01

    The main characteristics of eleven commercially available ear muffs were investigated in the laboratory and analyzed by a psychophysical and a physical method. Nine ear muffs were tested in mines. The three best muffs had bands passing behind the head. The ear muff with a support strap, which improves comfort and maintains a good fit during wear, showed the best attenuation. Causes of poor attenuation are listed. None of the ear muffs tested had all the characteristics desirable in an ideal unit. Because of unsatisfactory attenuation in working conditions, it should be a mandatory requirement that workers wear both ear muffs and ear plugs if the noise level is higher than 105 dBA.

  9. Objective Audiometry using Ear-EEG

    DEFF Research Database (Denmark)

    Christensen, Christian Bech; Kidmose, Preben

    Recently, a novel electroencephalographic (EEG) method called ear-EEG [1], that enable recording of auditory evoked potentials (AEPs) from a personalized earpiece was introduced. Initial investigations show that well established AEPs, such as ASSR and P1-N1-P2 complex can be observed from ear-EEG...... recordings [2, 3], implying a possible application for ear-EEG in audiometric characterization of hearing loss. Since the Ear-EEG method provides a discrete and non-invasive way of measuring neural signals and can be integrated into hearing aids, it has great potential for use in everyday life. Ear-EEG may...... therefore be an enabling technology for objective audiometry out of the clinic, allowing regularly fitting of the hearing aids to be made by the users in their everyday life environment. The objective of this study is to investigate the application of ear-EEG in objective audiometry....

  10. The Cheshire Cat revisited

    CERN Document Server

    Vento, V

    1998-01-01

    The concept of effective field theory leads in a natural way to a construction principle for phenomenological sensible models known under the name of the Cheshire Cat Principle. We review its formulation in the chiral bag scenario and discuss its realization for the flavor singlet axial charge. Quantum effects inside the chiral bag induce a color anomaly which requires a compensating surface term to prevent breakdown of color gauge invariance. The presence of this surface term allows one to derive in a gauge-invariant way a chiral-bag version of the Shore-Veneziano two-component formula for the flavor-singlet axial charge of the proton. We show that one can obtain a striking Cheshire-Cat phenomenon with a negligibly small singlet axial charge.

  11. Ear Recognition Based on Forstner and SIFT

    OpenAIRE

    Ma Chi; Zhu Yongyong; Tian Ying

    2013-01-01

    Extraction and expression of features are critical to improving the recognition rate of ear image recognition. This paper proposes a new ear recognition method based on SIFT(Scale-invariant feature transform) and Forstner corner detection technology. Firstly, Forstner corner points and SIFT keypoints are detected respectively. Then taking Forstner corner into the SIFT algorithm to calculate their descriptor as the image feature vectors. Finally ear recognition based on these feature is carrie...

  12. EARS: Electronic Access to Reference Service.

    OpenAIRE

    Weise, F O; Borgendale, M

    1986-01-01

    Electronic Access to Reference Service (EARS) is a front end to the Health Sciences Library's electronic mail system, with links to the online public catalog. EARS, which became operational in September 1984, is accessed by users at remote sites with either a terminal or microcomputer. It is menu-driven, allowing users to request: a computerized literature search, reference information, a photocopy of a journal article, or a book. This paper traces the history of EARS and discusses its use, i...

  13. Validation of normalized pulse volume in the outer ear as a simple measure of sympathetic activity using warm and cold pressor tests: towards applications in ambulatory monitoring

    International Nuclear Information System (INIS)

    Normalized pulse volume (NPV) derived from the ear has the potential to be a practical index for monitoring daily life stress. However, ear NPV has not yet been validated. Therefore, we compared NPV derived from an index finger using transmission photoplethysmography as a reference, with NPV derived from a middle finger and four sites of the ear using reflection photoplethysmography during baseline and while performing cold and warm water immersion in ten young and six middle-aged subjects. The results showed that logarithmically-transformed NPV (lnNPV) during cold water immersion as compared with baseline values was significantly lower, only at the index finger, the middle finger and the bottom of the ear-canal. Furthermore, lnNPV reactivities (ΔlnNPV; the difference between baseline and test values) from an index finger were significantly related to ΔlnNPV from the middle finger and the bottom of the ear-canal (young: r = 0.90 and 0.62, middle-aged: r = 0.80 and 0.58, respectively). In conclusion, these findings show that reflection and transmission photoplethysmography are comparable methods to derive NPV in accordance with our theoretical prediction. NPV derived from the bottom of the ear-canal is a valid approach, which could be useful for evaluating daily life stress. (paper)

  14. [Feline leishmaniasis: what's the epidemiological role of the cat?].

    Science.gov (United States)

    Mancianti, F

    2004-06-01

    Feline leishmaniasis (FL) is a quite uncommon feature. Clinical disease has been described in cats since nineties begin. More than 40 reports in world literature have been referred, but the clinical cases have been only recently well defined. Most of the reports focus on infected cats living in endemic areas, even if, more recently FL due to Leishmania infantum was found in Sao Paulo State, in Brazil where autochthonous human or canine leishmaniasis cases have never reported. In Europe clinical cases of FL have been described from Portugal, France, Spain and Italy from 1996 to 2002. When a typing of the etiological agent was performed L. infantum was identified in all reported cases. In some endemic areas serological surveys have also been carried out in cats, using IHAT in Egypt, Western blot in France or IFAT in Italy. Sixty Egyptian cats had low serological antibody titers, from 1/32 to 1/128, in the endemic focus of canine leishmaniasis of Alpes Maritimes 12 out of 97 (12.5%) cats showed antibodies versus antigens 14 and/or 18 kDa of L. infantum. A previous survey by means of IFAT in Liguria and Toscana on 110 and 158 feline sera respectively reports a seroprevalence of 0.9% with low titer, while sera from Sicily seem to be positive at higher dilutions. Animals living in an endemic area can develop specific antibodies against leishmania and, in our experience, they can be evidentiated by means of IFAT. The antibody titers appear to be lower in affected cats than in dogs, even if the number of clinical cases is very scanty. PCR tests on feline blood samples are in progress, but preliminary results confirm the presence of leishmania DNA in such specimens. Cutaneous leishmaniasis is the more frequent form in cats and it was reported from several countries. Typical signs include nodular to ulcer or crusty lesions on the nose, lips, ears, eyelids, alopecia: clinical signs of cutaneous FL are unspecific and in endemic area this infection must be taken into account

  15. Milestones in the History of Ear Reconstruction.

    Science.gov (United States)

    Berghaus, Alexander; Nicoló, Marion San

    2015-12-01

    The reconstruction of ear deformities has been challenging plastic surgeons since centuries. However, it is only in the 19th century that reports on partial and total ear reconstruction start increasing. In the quest for an aesthetically pleasing and natural-looking result, surgeons worked on the perfect framework and skin coverage. Different materials and flap techniques have evolved. Some were abandoned out of frustration, while others kept evolving over the years. In this article, we discuss the milestones in ear reconstruction-from ancient times to early attempts in Western civilization to the key chapters of ear reconstruction in the 20th century leading to the current techniques. PMID:26667630

  16. An Effective 3D Ear Acquisition System.

    Directory of Open Access Journals (Sweden)

    Yahui Liu

    Full Text Available The human ear is a new feature in biometrics that has several merits over the more common face, fingerprint and iris biometrics. It can be easily captured from a distance without a fully cooperative subject. Also, the ear has a relatively stable structure that does not change much with the age and facial expressions. In this paper, we present a novel method of 3D ear acquisition system by using triangulation imaging principle, and the experiment results show that this design is efficient and can be used for ear recognition.

  17. Objective Audiometry using Ear-EEG

    DEFF Research Database (Denmark)

    Christensen, Christian Bech; Kidmose, Preben

    . Recently, a novel EEG-method called ear-EEG that enable recording of auditory evoked potentials from a personalized earpiece was introduced. Since ear-EEG provides a discrete and non-invasive way of measuring neural signals and can be integrated into hearing aids, it has great potential for use in everyday...... life. Ear-EEG may therefore be an enabling technology for objective audiometry out of the clinic, allowing regularly fitting of the hearing aids to be made by the users in their everyday life environment. In this study we investigate the application of ear-EEG in objective audiometry....

  18. An Effective 3D Ear Acquisition System.

    Science.gov (United States)

    Liu, Yahui; Lu, Guangming; Zhang, David

    2015-01-01

    The human ear is a new feature in biometrics that has several merits over the more common face, fingerprint and iris biometrics. It can be easily captured from a distance without a fully cooperative subject. Also, the ear has a relatively stable structure that does not change much with the age and facial expressions. In this paper, we present a novel method of 3D ear acquisition system by using triangulation imaging principle, and the experiment results show that this design is efficient and can be used for ear recognition. PMID:26061553

  19. An eye for an ear

    OpenAIRE

    Wong, Yoong Wah Alex

    2012-01-01

    "An Eye for an Ear" Exhibition catalogue of award winning photography from the Photography Open Salon Arles 2012 exhibition ‘An Eye For An Ear‘. ‘An Eye For An Ear’ explores photographic observations, concepts, emotions, experiences and beliefs relating to the silences and the sounds of our society and the visible and invisible that surrounds us. Changes in how we view the world as a result of the development of new communication technologies, things that we see but that others may not hear o...

  20. Local cloning of CAT states

    International Nuclear Information System (INIS)

    In this Letter we analyze the (im)possibility of the exact cloning of orthogonal three-qubit CAT states under local operation and classical communication (LOCC) with the help of a restricted entangled state. We also classify the three-qubit CAT states that can (not) be cloned under LOCC restrictions and extend the results to the n-qubit case. -- Highlights: → We analyze the (im)possibility of exact cloning of orthogonal CAT states under LOCC. → We also classify the set of CAT states that can(not) be cloned by LOCC. → No set of orthogonal CAT states can be cloned by LOCC with help of similar CAT state. → Any two orthogonal n-qubit GHZ-states can be cloned by LOCC with help of a GHZ state.

  1. Environmental Enrichment for Indoor Cats

    OpenAIRE

    Herron, Meghan E.; Buffington, C. A. Tony

    2010-01-01

    Recommendations to cat owners to house their cats indoors confer the responsibility to provide conditions that ensure good health and welfare. Cats maintain their natural behaviors, such as scratching, chewing, and elimination, while living indoors, and they may develop health and behavior problems when deprived of appropriate environmental outlets for these behaviors. This article divides the environment into five basic “systems” to enable identification of features that may benefit from imp...

  2. Hypereosinophilic syndrome in two cats.

    Science.gov (United States)

    Takeuchi, Yoshinori; Matsuura, Shinobu; Fujino, Yasuhito; Nakajima, Mayumi; Takahashi, Masashi; Nakashima, Ko; Sakai, Yusuke; Uetsuka, Koji; Ohno, Koichi; Nakayama, Hiroyuki; Tsujimoto, Hajime

    2008-10-01

    Two cats showing chronic vomiting, diarrhea and weight loss were found to have leukocytosis with marked eosinophilia. Both cats were diagnosed with hypereosinophilic syndrome by the findings of increased eosinophils and their precursors in the bone marrow, eosinophilic infiltration into multiple organs, and exclusion of other causes for eosinophilia. Although cytoreductive chemotherapy with hydroxycarbamide and prednisolone was performed, these two cats died 48 days and 91 days after the initial presentation. PMID:18981665

  3. Environmental enrichment for indoor cats.

    Science.gov (United States)

    Herron, Meghan E; Buffington, C A Tony

    2010-12-01

    Recommendations to cat owners to house their cats indoors confer the responsibility to provide conditions that ensure good health and welfare. Cats maintain their natural behaviors, such as scratching, chewing, and elimination, while living indoors, and they may develop health and behavior problems when deprived of appropriate environmental outlets for these behaviors. This article divides the environment into five basic "systems" to enable identification of features that may benefit from improvement. It also addresses practical means of meeting cats' needs in each of these systems. PMID:21882164

  4. The Cat nRules

    OpenAIRE

    Mould, Richard A

    2004-01-01

    The nRules that are developed in another paper are applied to two versions of the Schrodinger cat experiment. In version I the initially conscious cat is made unconscious by a mechanism that is initiated by a radioactive decay. In version II the initially unconscious cat is awakened by a mechanism that is initiated by a radioactive decay. In both cases an observer is permitted to check the statues of the cat at any time during the experiment. In all cases the nRules correctly and unambiguousl...

  5. Congenital malformation of inner ear, single cavity

    International Nuclear Information System (INIS)

    Congenital malformations of the inner ear are rare conditions, but their detection requires high diagnostic accuracy. In this report we describe the case of a patient with single or common cavity, discuss the corresponding radiological images, describe the treatment of this patient with a cochlear implant, and review the classification and differential diagnosis of the other anomalies of the inner ear.

  6. Playing by Ear: Foundation or Frill?

    Science.gov (United States)

    Woody, Robert H.

    2012-01-01

    Many people divide musicians into two types: those who can read music and those who play by ear. Formal music education tends to place great emphasis on producing musically literate performers but devotes much less attention to teaching students to make music without notation. Some would suggest that playing by ear is a specialized skill that is…

  7. INNER EAR EMBRYOGENESIS: GENETIC AND ENVIRONMENTAL DETERMINANTS

    Science.gov (United States)

    The anatomy and developmental molecular genetics of the inner ear from establishment of the otic placode to formation of the definitive cochlea and vestibular apparatus will be reviewed and the complex 3-D structural changes that shape the developing inner ear will be illustrated...

  8. cats and dogs

    Institute of Scientific and Technical Information of China (English)

    颜玉秀

    2003-01-01

    有这样一则英语成语:“To rain cats anddogs.”如果望文生义,则会被译为“下猫下狗”,因而会弄出许多笑话来,这应当是值得引以为戒的。其实这句成语的真正含义是:“下倾盆大雨”。那么下雨为什么会与cats和dogs联系在一起呢?

  9. A Model for the representation of Speech Signals in Normal and Impaired Ears

    DEFF Research Database (Denmark)

    Christiansen, Thomas Ulrich

    2004-01-01

    dependent. Impaired hearing was modelled as a combination of outer- and inner hair cell loss. The percentage of dead inner hair cells was calculated based on a new computational method relating auditory nerve fibre thresholds to behavioural thresholds. Finally, a model of the entire auditory nerve fibre......A model of human auditory periphery, ranging from the outer ear to the auditory nerve, was developed. The model consists of the following components: outer ear transfer function, middle ear transfer function, basilar membrane velocity, inner hair cell receptor potential, inner hair cell probability...... of neurotransmitter release and auditory nerve fibre refractoriness. The model builds on previously published models, however, parameters for basilar membrane velocity and inner hair cell probability of neurotransmitter release were successfully fitted to model data from psychophysical and...

  10. The aquatic tympanic ear: convergent adaptations for underwater hearing in three tetrapods

    DEFF Research Database (Denmark)

    Christensen-Dalsgaard, Jakob; Wahlberg, Magnus; Larsen, Ole Næsbye

    All groups of tetrapods have members that adopt aquatic lifestyles with physiological adaptations also of their auditory system. Auditory sensitivity is affected by the different characteristic impedances in air and water caused by the differences in density and sound speed. Water is a high...... modified (cartilaginous or partly cartilaginous). In all three species, the lowest threshold to underwater sound is at this peak frequency and is around 80 dB re 1 µPa. The sensitivity to sound pressure is slightly lower in water than in air, making underwater hearing much more efficient in terms of sound...... pressure, low particle motion medium, and the consequence is that an efficient underwater ear is sensitive to sound pressure. It is often stated that underwater hearing can work efficiently without a middle ear apparatus by bone conduction, since sound is transmitted from water to inner ear tissue with...

  11. Measurements and modeling of ear-canal reflectance and cochlear reflectance

    Science.gov (United States)

    Neely, Stephen T.; Rasetshwane, Daniel M.

    2015-12-01

    Cochlear reflectance (CR), the cochlear contribution to ear-canal reflectance (ECR), has theoretical advantages for cochlear modeling. Comparisons between measurements and models may lead to improved clinical interpretation of cochlear status and provide a basis for making improvements to the models. Simulation of ECR was performed using a combination of (1) an ear-canal model, (2) a middle-ear model and (3) a one-dimensional cochlear model. Simulated CR was the ECR difference between active and passive conditions of the model. The model simulation results were compared with measurements of both ECR and CR in both the time-domain and frequency-domains. Disparities between measurements and model provide a basis for improvements in the model. Substantial agreement between measurements and model suggest that CR is consistent with linear coherent reflection due to random impedance perturbations along the cochlear partition.

  12. X-linked deafness, stapes gushers and a distinctive defect of the inner ear

    International Nuclear Information System (INIS)

    We have made genetic linkage studies in 7 pedigrees in whom deafness was inherited in an X-linked manner. All patients had a full range of audiometric and vestibular function tests. Thin section high resolution CT in two planes was used to assess the state of the middle and inner ears. We found a distinctive inner ear deformity in some of the deaf males. Moreover, some of the obligate feamle carriers seem to have a milder form of the same anomaly associated with slight hearing loss. Genetic studies on some of the deaf males with apparently normal inner ear anatomy suggest a different locus on the X chromosome and hence a different pathogenesis for the deafness. (orig./GDG)

  13. EzCatDB: M00143 [EzCatDB

    Lifescience Database Archive (English)

    Full Text Available http://ezcatdb.cbrc.jp/EzCatDB/search/get.do?dbcode=M00143 EzCatDB M00143 0) { response = "?" + ... 1995 Volume 34 Pages 955-64 Authors Mimeault M, De Lean ... A, Lafleur M, Bonenfant D, Fournier A Title Evalua ...

  14. Ear Recognition Based on Forstner and SIFT

    Directory of Open Access Journals (Sweden)

    Ma Chi

    2013-07-01

    Full Text Available Extraction and expression of features are critical to improving the recognition rate of ear image recognition. This paper proposes a new ear recognition method based on SIFT(Scale-invariant feature transform and Forstner corner detection technology. Firstly, Forstner corner points and SIFT keypoints are detected respectively. Then taking Forstner corner into the SIFT algorithm to calculate their descriptor as the image feature vectors. Finally ear recognition based on these feature is carried out with Euclidean distance as similarity measurement. A bi-directional matching algorithm is utilized for improving recognition rate. Experiments on USTB database show that the recognition rate reaches more 94%. The Experimental results prove the effectiveness of the proposed method in term of recognition accuracy in comparison with previous methods. It is robust to rigid changes of ear image and provides a new approach to the research for ear recognition.

  15. Microbiology of discharging ears in Ethiopia

    Institute of Scientific and Technical Information of China (English)

    Getachew Tesfaye; Daniel Asrat; Yimtubezinash Woldeamanuel; Messele Gizaw

    2009-01-01

    Objectives:To isolate and identify the bacterial etiologic agents,including their antibiotic susceptibility pat-tern isolated from patients with discharging ear infections.Methods:Between September 2006 and February 2007,178 patients with discharging ear visiting ENT clinics of St.Paul and Tikur Anbessa University Hospi-tals Addis Ababa,Ethiopia were investigated.Results:Of the patients investigated,52.8% were males and 47.2% were females resulting in an overall male to female ratio of 1.1:1.Ear discharge was the commonest clinical finding followed by hearing problem (91.2%),otalgia (ear pain)(74.7%),fever (17.9%)and itching of external ear (5.1%).S.aureus accounted for 30.2% of the total isolates followed by Proteus ssp. (P.mirabilis,P.vulgaris )(25.4%),and P.aeruginosa (13.4%).Both gram positive and negative bac-teria isolated from ear infections showed low resistance rates to most antimicrobial agents tested.Overall ceftri-axone and ciprofloxacin were the most effective drugs when compared to other drugs tested against the gram-positive and gram-negative bacteria.Conclusion:Otitis media was the most common clinical finding in pa-tients with ear infection.With discharging ear,the gram-negative bacteria were the predominant isolates.The susceptibility pattern of isolates from the study showed that ceftriaxone,ciprofloxacin and gentamicin were the most effective drugs.It is recommended that treatment of ear infections should be based on culture and sensi-tivity at the study sites.Therefore,efforts should be directed towards early diagnosis and treatment of acute ear infection and continued re-evaluation of the resistant patterns of organisms to optimize treatments and reduce complications.

  16. Toxoplasmosis: An Important Message for Cat Owners

    Science.gov (United States)

    ... role do cats play in the spread of toxoplasmosis? Cats get Toxoplasma infection by eating infected rodents, ... an infected cat may have defecated. What is toxoplasmosis? Toxoplasmosis is an infection caused by a microscopic ...

  17. Accelerator programme at CAT

    International Nuclear Information System (INIS)

    The Accelerator Programme at the Centre for Advanced Technology (CAT), Indore, has very broad based concept under which all types of accelerators are to be taken up for design and fabrication. This centre will be housing a wide variety of accelerators to serve as a common facility for the universities, national laboratories in addition to laboratories under the Department of Atomic Energy. In the first phase of the programme, a series of electron accelerators are designed and fabricated. They are synchrotron radiation sources of 450 MeV (INDUS-I) and of 2 GeV (INDUS-II), microtron upto energy of 20 MeV, linear accelerator upto 20 MeV, and DC Accelerator for industrial irradiation upto 750 KeV and 20 KW. A proton accelerator of 300 MeV with 20 MeV linac injector is also designed. CAT is also developing a strong base for support technologies like ultra high vacuum, radio frequency and microwaves, DC pulsed and superconducting magnets, power supplies and controls etc. These technologies are very useful for other industrial applications also. To develop user groups to utilise INDUS-II synchrotron radiation source, a batch production of rotating Anode X-ray generators with power supplies has been initiated. So also, the sputter ion pumps, electron guns, turbo molecular pumps are brought into batch production. (author)

  18. CONTRACT ADMINISTRATIVE TRACKING SYSTEM (CATS)

    Science.gov (United States)

    The Contract Administrative Tracking System (CATS) was developed in response to an ORD NHEERL, Mid-Continent Ecology Division (MED)-recognized need for an automated tracking and retrieval system for Cost Reimbursable Level of Effort (CR/LOE) Contracts. CATS is an Oracle-based app...

  19. College Students and Their Cats

    Science.gov (United States)

    Weinstein, Lawrence; Alexander, Ralph

    2010-01-01

    Twenty-two Siamese and 32 mixed breed cats' personalities were rated by their respective college student owners and compared. Further, the owners' self rated personality traits were correlated with the pets'; significant Siamese and Mixed differences and correlations were obtained. These are the first data to examine breed of cat on a personality…

  20. [Glomerulonephritis in dogs and cats].

    Science.gov (United States)

    Reinacher, M; Frese, K

    1991-04-01

    Immunohistology and special staining of plastic sections allow diagnosis and differentiation of subtypes of glomerulonephritis in dogs. Frequency and clinical importance of these forms of glomerulonephritis vary significantly. In cats, glomerulonephritis occurs frequently in FIV-positive cats but is rare in animals suffering from persistent FeLV infection or FIP. PMID:2068715

  1. Peritoneopericardial diaphragmatic hernia in cats

    International Nuclear Information System (INIS)

    Peritoneopericardial diaphragmatic hernia in a cat is often an incidental finding on a routine thoracic or abdominal radiograph. Clinical signs are nonspecific-usually respiratory (dyspnea) or gastrointestinal(vomiting or diarrhea). Some of the cats with this anomaly are asymptomatic. The physical examination may be normal: muffled heart sounds are the most common abnormality noted during a physical examination. Cats of many breeds are affected, although 26% of reported cases were inPersians. Age of the cat at diagnosis ranged from 6 days to 14 years. Thirty of the 52 reported cases were in females. Diagnostic studies used to confirm the diagnosis included echocardiography, upper gastrointestinal study, ultrasonography, angiography, positive-contrast peritoneography, and laparotomy. Surgical correction was reportedly successful in 22 of 25 cats

  2. Understanding fly-ear inspired directional microphones

    Science.gov (United States)

    Liu, Haijun; Zhang, Xuming; Yu, Miao

    2009-03-01

    In this article, the equivalent two-degree-of-freedom (2-DOF) model for the hypersensitive ear of fly Ormia ocharacea is revisited. It is found that in addition to the mechanical coupling between the ears, the key to the remarkable directional hearing ability of the fly is the proper contributions of the rocking mode and bending mode of the ear structure. This can serve as the basis for the development of fly-ear inspired directional microphones. New insights are also provided to establish the connection between the mechanics of the fly ear and the prior biological experiments, which reveals that the fly ear is a nature-designed optimal structure that might have evolved to best perform its localization task at 5 kHz. Based on this understanding, a new design of the fly-ear inspired directional microphone is presented and a corresponding normalized continuum mechanics model is derived. Parametric studies are carried out to study the influence of the identified non-dimensional parameters on the microphone performance. Directional microphones are developed to verify the understanding and concept. This study provides a theoretical guidance to develop miniature bio-inspired directional microphones, and can impact many fronts that require miniature directional microphones.

  3. Like herding cats.

    Science.gov (United States)

    Muller-Smith, P

    1997-12-01

    In an effort to be a good manager, it is easy to lose sight of the fact that knowledge workers require a unique approach from their manager. Because nurses are independent and capable individuals that prosper in an environment that recognizes them as knowledge workers, nurse managers often find that traditional management techniques are not sufficient. Trying to manage all of the nurses on a unit as a single group is much like trying to herd cats. It might be less frustrating for the nurse manager to lead gently rather than manage with a firm hand. Warren Bennis suggests that this approach may provide a valuable key to successfully managing in a world of constant change. PMID:9464034

  4. Cat Ownership Perception and Caretaking Explored in an Internet Survey of People Associated with Cats

    OpenAIRE

    Zito, Sarah; Vankan, Dianne; Bennett, Pauleen; Paterson, Mandy; Phillips, Clive J. C.

    2015-01-01

    People who feed cats that they do not perceive they own (sometimes called semi-owners) are thought to make a considerable contribution to unwanted cat numbers because the cats they support are generally not sterilized. Understanding people’s perception of cat ownership and the psychology underlying cat semi-ownership could inform approaches to mitigate the negative effects of cat semi-ownership. The primary aims of this study were to investigate cat ownership perception and to examine its ass...

  5. Three dimensional and high resolution magnetic resonance imaging of the inner ear. Normal ears and anomaly scanned with 3D-CISS sequence

    International Nuclear Information System (INIS)

    The MRI system used in this study was a new scanning sequence, 3D-CISS (Three dimensional-constructive interference in steady state) with 1.5 Tesla. Ten normal ears and one ear with Mondini type anomaly were scanned and reconstructed. In imagings of normal inner ears, the cochlea has three spiral layers; basal, middle and apical turns. Each turn was separated into three parts; the scala vestibuli, osseous spiral lamina and scala tympani. Three semicircular ducts, utricle and saccule were also reconstructed in one frame. In the inner ear of Mondini anomaly, 3D MRI showed cochlear aplasia, hypoplasia of semicircular ducts and widely dilated vestibule. The imaging was identical with findings of ''common cavity''. The anomaly was easily recognized in 3D MRI more than in 2D imagings. The detailed and cubic imagings of the Mondini anomaly in 3D MRI could not be observed with conventional 2D MRI. 3D MRI is not invasive method and can scan a target very quickly. (author)

  6. Clinical, radiographic, and bronchial cytologic features of cats with bronchial disease: 65 cases (1980-1986)

    International Nuclear Information System (INIS)

    Medical records, radiographs, and bronchial cytologic abnormalities of 65 cats with bronchial disease were reviewed. Bronchial disease was defined as abnormality of the lower airways to the exclusion of disease originating or mainly involving the alveoli, interstitium, vasculature, or pleura. Cats with bronchial disease were more likely to be female and older. Siamese cats were over represented and had more chronic disease. In order of frequency, the following clinical signs were reported: coughing, dyspnea, occasional sneezing, wheezing, and vomiting. Radiography revealed prominent bronchial markings, with some cats having collapse of the middle lobe of the right lung (n = 7), overinflation of the lungs (n = 9), or aerophagia (n = 13). Of 65 bronchial washes, 58 were considered exudative, with the predominant cell type being eosinophil in 24%, neutrophil in 33%, macrophage in 22%, and mixed population of cells in 21%. Cultures for bacteria were considered positive in 24% of the cats. Circulating eosinophilia was not helpful in predicting the predominant cell type in bronchial cytologic exudates. Hyperproteinemia without dehydration was present in a third of the cats, indicating an immunologic response. Half the cats had resolution of clinical signs, whereas half the cats required continuing medication with bronchodilators, antimicrobial agents, or corticosteroids

  7. Ear Infections in Autistic and Normal Children. Brief Report.

    Science.gov (United States)

    Konstantareas, M. Mary; Homatidis, Soula

    1987-01-01

    Evaluation of the frequency of ear infections, ear tube drainage, and deafness for 51 autistic children (ages 2-18) indicated that autistic children had a greater incidence of ear infections than matched normal peers and lower functioning children had an earlier onset of ear infections than higher functioning autistic peers. (Author)

  8. 38 CFR 4.87 - Schedule of ratings-ear.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Schedule of ratings-ear...—ear. Diseases of the Ear Rating 6200Chronic suppurative otitis media, mastoiditis, or cholesteatoma... of the substance 10 6208Malignant neoplasm of the ear (other than skin only) 100 Note: A rating...

  9. 21 CFR 874.4140 - Ear, nose, and throat bur.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Ear, nose, and throat bur. 874.4140 Section 874...) MEDICAL DEVICES EAR, NOSE, AND THROAT DEVICES Surgical Devices § 874.4140 Ear, nose, and throat bur. (a) Identification. An ear, nose, and throat bur is a device consisting of an interchangeable drill bit that...

  10. Environment for Auditory Research Facility (EAR)

    Data.gov (United States)

    Federal Laboratory Consortium — EAR is an auditory perception and communication research center enabling state-of-the-art simulation of various indoor and outdoor acoustic environments. The heart...

  11. Short colon in a cat

    International Nuclear Information System (INIS)

    An 11-year-old male Japanese domestic cat was referred to the veterinary hospital with a chronic diarrhea and signs of pain and vocalization when defecating. The cat has discharged unformed feces throughout his life. Morphological diagnosis of short colon was made radiographically after barium enema. The ileocolic junction and cecum was located to the left of the midline at the proximal end of the descending colon. Additional endoscopic examination demonstrated the difference in visual structures of the mucosal surface and in histological structures on mucosal biopsy specimens, between the colon and ileum. This is the first report of short colon in a cat in Japan

  12. Scratch responses in normal cats: hindlimb kinematics and muscle synergies.

    Science.gov (United States)

    Kuhta, P C; Smith, J L

    1990-12-01

    1. Scratch responses evoked by a tactile stimulus applied to the outer ear canal were characterized in nine adult cats. Chronic electromyographic (EMG) electrodes were surgically implanted in selected flexor and extensor muscles of the hip, knee, and ankle joints to determine patterns of muscle activity during scratching. In some trials EMG records were synchronized with kinematic data obtained by digitizing high-speed ciné film, and in one cat, medial gastrocnemius (MG) tendon forces were recorded along with EMG. For analysis the response was divided into three components: the approach, cyclic, and return periods. Usually scratch responses were initiated with the cat in a sitting position, but in some trials the animal initiated the response from a standing or lying posture. 2. During the approach period the hindlimb ipsilateral to the stimulated ear was lifted diagonally toward the head by a combination of hip and ankle flexion with knee extension. Hindlimb motions during the approach period were associated with sustained EMG activity in hip-flexor, knee-extensor (occasionally), and ankle-flexor muscles. Initial hindlimb motions were typically preceded by head movements toward the hindpaw, and at the end of the approach period, the head was tilted downward with the stimulated pinna lower than the contralateral ear. During the return period movements were basically the reverse of the approach period, with the hindpaw returning to the ground and the head moving away from the hindlimb. 3. During the cyclic period the number of cycles per response varied widely from 1 to 60 cycles with an average of 13 cycles, and cycle frequency ranged from 4 to 8 cycles/s, with a mean of 5.6 cycles/s. During each cycle the paw trajectory followed a fairly circular path, and the cycle was defined by three phases: precontact, contact, and postcontact. On average the contact phase occupied approximately 50% of the cycle and was characterized by extensor muscle activity and extension

  13. An Ear-Worn Vital Signs Monitor

    OpenAIRE

    He, David Da; Winokur, Eric S.; Sodini, Charles G.

    2015-01-01

    This paper presents a wearable vital signs monitor at the ear. The monitor measures the electrocardiogram (ECG), ballistocardiogram (BCG), and photoplethysmogram (PPG) to obtain pre-ejection period (PEP), stroke volume (SV), cardiac output (CO), and pulse transit time (PTT). The ear is demonstrated as a natural anchoring point for the integrated sensing of physiological signals. All three signals measured can be used to obtain heart rate (HR). Combining the ECG and BCG allows for the estimati...

  14. Cutaneous lesions of the external ear

    Directory of Open Access Journals (Sweden)

    Mann Benno

    2008-02-01

    Full Text Available Abstract Skin diseases on the external aspect of the ear are seen in a variety of medical disciplines. Dermatologists, othorhinolaryngologists, general practitioners, general and plastic surgeons are regularly consulted regarding cutaneous lesions on the ear. This article will focus on those diseases wherefore surgery or laser therapy is considered as a possible treatment option or which are potentially subject to surgical evaluation.

  15. Commissioning of n_TOF EAR2

    CERN Multimedia

    The construction of the second beam line and experiment area (EAR2) of the n_TOF facility is currently ongoing and scheduled to be completed by July 2014. An extensive series of measurements is planned in order to determine the beam characteristics like the neutron flux, the spatial beam profile and the resolution function, as well as the response of several detectors considered for use in future measurements at EAR2. A rigorous study of backgrounds will be undertaken in various conditions.

  16. Retrospective study of ear findings of dogs submitted to cranial tomography in FMVZ - UNESP, Botucatu; Estudo retrospectivo dos achados otologicos de caes submetidos a tomografia craniana na FMVZ - UNESP, Botucatu

    Energy Technology Data Exchange (ETDEWEB)

    Babicsak, Viviam Rocco; Oliveira, Hugo Salvador de; Belotta, Alexandra Frey; Santos, Debora Rodrigues dos; Zardo, Karen Maciel; Mamprim, Maria Jaqueline; Machado, Vania Maria de Vasconcelos; Vulcano, Luiz Carlos, E-mail: viviam.babicsak@gmail.com [Universidade Estadual Paulista Julio de Mesquita Filho (FMVZ/UNESP), Botucatu, SP (Brazil). Faculdade de Medicina Veterinaria e Zootecnia. Dept. de Reproducao Animal e Radiologia Veterinaria

    2012-07-01

    Computed tomography (CT) is an important imaging modality in the diagnosis of ear alterations, especially those affecting the middle ear. In this retrospective study, in which the cranial CT scans of 151 dogs were evaluated, the most common finding was the mineralization of the external auditory cartilage, followed by secretions in external and middle ear and tissue in these two regions. The average age of affected animals ranged from 6-9 years. Mixed breed dogs were the most affected animals, followed by cockers, boxers, poodles, labrador retrievers, german shepherds and pit bulls. (author)

  17. Fundamentals of ServCat

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This training manual for the U.S. Fish and Wildlife Service Catalog (ServCat) provides detailed instructions on searching for records, creating records, and...

  18. NRPC ServCat priorities

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document lists the Natural Resource Program Centers priority ServCat documents. It is recommended that these documents which include annual narrative reports,...

  19. Properties of squeezed Schroedinger cats

    International Nuclear Information System (INIS)

    In this article we investigate some statistical properties of the even and odd squeezed (squeezed Schroedinger cat) states. The quasi-probability distribution functions especially W(α) and Q(α) are calculated and discussed for these states. The phase distribution function is discussed. A generation scheme is proposed for either the squeezed generalized Schroedinger cat, or the squeezed number state. (author). 35 refs, 5 figs

  20. Seizures and epilepsy in cats

    OpenAIRE

    Moore SA

    2014-01-01

    Sarah A Moore Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA Abstract: Seizures are a common presenting complaint in cats, although causes and options for the treatment of seizures in this species have been historically poorly described in the veterinary literature. Seizure manifestation in cats may be different than what is typically seen in dogs, but the underlying causes of seizure activity are the same. These include primary epilepsies, structura...

  1. Echocardiographic Findings in 11 Cats with Acromegaly

    OpenAIRE

    Myers, J A; Lunn, K.F.; Bright, J.M.

    2014-01-01

    Background Information regarding cardiac changes in domestic cats with acromegaly is limited. Hypothesis/Objectives The objective of this study was to describe the echocardiographic findings in cats with acromegaly. Animals Eighteen cats diagnosed with acromegaly at Colorado State University between 2008 and 2012. Of these 18 cats, 11 had echocardiography performed. Methods A retrospective review of medical records was made to identify cats with acromegaly that also had echocardiography perfo...

  2. Schrodinger's cat: much ado about nothing

    CERN Document Server

    Ionicioiu, Radu

    2016-01-01

    In this note I briefly discuss the Schrodinger's cat Gedankenexperiment. By analysing the information flow in the system I show that no entanglement exists between the atom and the cat. The atom and the cat are connected only through a classical information channel (detector clicks $\\rightarrow$ poison is released $\\rightarrow$ cat is dead). No amount of local operations and classical communication can entangle the atom and the cat. Consequently, the paradox disappears.

  3. Acquired retinal folds in the cat.

    Science.gov (United States)

    MacMillan, A D

    1976-06-01

    Retinal folds were found in 5 cats. The apparent cause of the folding was varied: in 1 cat the folds appeared after a localized retinal detachment; in 2 cats the condition accompanied other intraocular abnormalities associated with feline infectious peritonitis; 1 cat had active keratitis, and the retinal changes were thought to have been injury related; and 1 cat, bilaterally affected, had chronic glomerulonephritis. PMID:945253

  4. Plasma and ear tissue concentrations of enrofloxacin and its metabolite ciprofloxacin in dogs with chronic end-stage otitis externa after intravenous administration of enrofloxacin.

    Science.gov (United States)

    Cole, Lynette K; Papich, Mark G; Kwochka, Kenneth W; Hillier, Andrew; Smeak, Daniel D; Lehman, Amy M

    2009-02-01

    The purpose of this study was to measure the concentrations of enrofloxacin and its metabolite ciprofloxacin following intravenous administration of enrofloxacin in the plasma and ear tissue of dogs with chronic end-stage otitis undergoing a total ear canal ablation and lateral bulla osteotomy. The goals were to determine the relationship between the dose of enrofloxacin and the concentrations of enrofloxacin and ciprofloxacin, and determine appropriate doses of enrofloxacin for treatment of chronic otitis externa and media. Thirty dogs were randomized to an enrofloxacin-treatment group (5, 10, 15 or 20 mg kg(-1)) or control group (no enrofloxacin). After surgical removal, ear tissue samples (skin, vertical ear canal, horizontal ear canal, middle ear) and a blood sample were collected. Concentrations of enrofloxacin and ciprofloxacin in the plasma and ear tissue were measured by high performance liquid chromatography. Repeated measures models were applied to log-transformed data to assess dosing trends and Pearson correlations were calculated to assess concentration associations. Ear tissue concentrations of enrofloxacin and ciprofloxacin were significantly (P ciprofloxacin concentrations, respectively. For bacteria with an minimal inhibitory concentration of 0.12-0.15 or less, 0.19-0.24, 0.31-0.39 and 0.51-0.64 microg mL(-1), enrofloxacin should be dosed at 5, 10, 15 and 20 mg kg(-1), respectively. Treatment with enrofloxacin would not be recommended for a bacterial organism intermediate or resistant in susceptibility to enrofloxacin since appropriate levels of enrofloxacin would not be attained. PMID:19152587

  5. Ear-to-Ear On-Body Channel Model for Hearing Aid Applications

    DEFF Research Database (Denmark)

    Kvist, Søren Helstrup; Thaysen, Jesper; Jakobsen, Kaj Bjarne

    2015-01-01

    . The variation in the ear-to-ear on-body path gain, due to perturbations of the shape of the nominal SAM head, is studied by the use of a Monte Carlo analysis. The analysis revealed that the path gain that is obtained with a single on-body radiation pattern may vary upto 25dB....

  6. Reported cat bites in Dallas: characteristics of the cats, the victims, and the attack events.

    OpenAIRE

    Wright, J C

    1990-01-01

    Associated with the increased popularity of cats as pets in American households has been an increase in the number of cat bites reported to health departments. Bite reports from Dallas, TX, for 1985 were analyzed for different aspects of the cat bite event, including characteristics of the cats, the people bitten, the wounds, and the attack events. Cat bites and scratches constituted 25 percent of the 2,494 reported animal bites. Biting cats were typically stray females. People 21 to 35 years...

  7. Cat Ownership Perception and Caretaking Explored in an Internet Survey of People Associated with Cats.

    Directory of Open Access Journals (Sweden)

    Sarah Zito

    Full Text Available People who feed cats that they do not perceive they own (sometimes called semi-owners are thought to make a considerable contribution to unwanted cat numbers because the cats they support are generally not sterilized. Understanding people's perception of cat ownership and the psychology underlying cat semi-ownership could inform approaches to mitigate the negative effects of cat semi-ownership. The primary aims of this study were to investigate cat ownership perception and to examine its association with human-cat interactions and caretaking behaviours. A secondary aim was to evaluate a definition of cat semi-ownership (including an association time of ≥1 month and frequent feeding, revised from a previous definition proposed in the literature to distinguish cat semi-ownership from casual interactions with unowned cats. Cat owners and semi-owners displayed similar types of interactions and caretaking behaviours. Nevertheless, caretaking behaviours were more commonly displayed towards owned cats than semi-owned cats, and semi-owned cats were more likely to have produced kittens (p<0.01. All interactions and caretaking behaviours were more likely to be displayed towards cats in semi-ownership relationships compared to casual interaction relationships. Determinants of cat ownership perception were identified (p<0.05 and included association time, attachment, perceived cat friendliness and health, and feelings about unowned cats, including the acceptability of feeding unowned cats. Encouraging semi-owners to have the cats they care for sterilized may assist in reducing the number of unwanted kittens and could be a valuable alternative to trying to prevent semi-ownership entirely. Highly accessible semi-owner "gatekeepers" could help to deliver education messages and facilitate the provision of cat sterilization services to semi-owners. This research enabled semi-ownership to be distinguished from casual interaction relationships and can assist

  8. Ear Acupuncture in European Traditional Medicine

    Directory of Open Access Journals (Sweden)

    Luigi Gori

    2007-01-01

    Full Text Available Auricular acupuncture is a diagnostic and treatment system based on normalizing the body's dysfunction through stimulation of definite points on the ear. Rudimentary forms of acupuncture which probably arose during the Stone Age have survived in many parts of the world right down to present day. It was used in the ancient Egypt, Rome, Greece and all the Mediterranean area. It is a microacupuncture technique similar to reflexology, and was first described in France in 1950 by Paul Nogier who is considered the Father of modern ear acupuncture. It was speculated that the technique works because groups of pluripotent cells contain information from the whole organism and create regional organization centers representing different parts of the body. Nevertheless stimulation of a reflex point in the ear seems relieve symptoms of distant pathologies. Modern research is confirming the efficacy of ear acupuncture for analgesia and anxiety related disease, while tobacco dependence and other substance abuse still need confirmation. Actually main methodological problems with auricular acupuncture are that exist too many maps with little agreement regarding point location in the ear, and that the correspondence or reflex systems does not correlated with modern knowledge of anatomy and physiology.

  9. The acoustical significance of age-dependent ear elongation

    DEFF Research Database (Denmark)

    Christensen, Flemming

    2015-01-01

    Elderly people, especially some old men, appear to have very large ears. This paper presents an investigation on the acoustic significance of the age dependent ear elongation. HRTFs and ear lengths were measured for two groups of young and old people. The older groups had larger ears on average......, corresponding to what is reported in the literature. For female ears, virtually no acoustical effect was found. For male ears directional dependent effects in the range up to 5 dB on average was found for certain directions and frequencies. Implications on age dependent hearing loss (presbycusis) and...

  10. On Schr\\"odinger's cat

    CERN Document Server

    de Silva, Nalin

    2010-01-01

    Schr\\"odinger's cat appears to have been harassed in a chamber during the past eighty years or so by interpreting the role of the observer as a person, who sets an experiment and then observes results, may be after some time. The realist position tells us that the physical processes would take place independent of the observer with well defined properties, whereas the positivist position wants us to believe that nothing can be said of a system when it is not being observed. In this paper we question both these positions and also the assumption that the atom and the cat are entangled and further whether the atom could be considered to be in a state of decay and not decay. We let the cat either out of the bag (chamber) or rest in peace with or without the atom or the observer.

  11. Cat Ownership Perception and Caretaking Explored in an Internet Survey of People Associated with Cats.

    Science.gov (United States)

    Zito, Sarah; Vankan, Dianne; Bennett, Pauleen; Paterson, Mandy; Phillips, Clive J C

    2015-01-01

    People who feed cats that they do not perceive they own (sometimes called semi-owners) are thought to make a considerable contribution to unwanted cat numbers because the cats they support are generally not sterilized. Understanding people's perception of cat ownership and the psychology underlying cat semi-ownership could inform approaches to mitigate the negative effects of cat semi-ownership. The primary aims of this study were to investigate cat ownership perception and to examine its association with human-cat interactions and caretaking behaviours. A secondary aim was to evaluate a definition of cat semi-ownership (including an association time of ≥1 month and frequent feeding), revised from a previous definition proposed in the literature to distinguish cat semi-ownership from casual interactions with unowned cats. Cat owners and semi-owners displayed similar types of interactions and caretaking behaviours. Nevertheless, caretaking behaviours were more commonly displayed towards owned cats than semi-owned cats, and semi-owned cats were more likely to have produced kittens (pcats in semi-ownership relationships compared to casual interaction relationships. Determinants of cat ownership perception were identified (pcat friendliness and health, and feelings about unowned cats, including the acceptability of feeding unowned cats. Encouraging semi-owners to have the cats they care for sterilized may assist in reducing the number of unwanted kittens and could be a valuable alternative to trying to prevent semi-ownership entirely. Highly accessible semi-owner "gatekeepers" could help to deliver education messages and facilitate the provision of cat sterilization services to semi-owners. This research enabled semi-ownership to be distinguished from casual interaction relationships and can assist welfare and government agencies to identify cat semi-owners in order to develop strategies to address this source of unwanted cats. PMID:26218243

  12. Spatial Stream Segregation by Cats.

    Science.gov (United States)

    Javier, Lauren K; McGuire, Elizabeth A; Middlebrooks, John C

    2016-06-01

    Listeners can perceive interleaved sequences of sounds from two or more sources as segregated streams. In humans, physical separation of sound sources is a major factor enabling such stream segregation. Here, we examine spatial stream segregation with a psychophysical measure in domestic cats. Cats depressed a pedal to initiate a target sequence of brief sound bursts in a particular rhythm and then released the pedal when the rhythm changed. The target bursts were interleaved with a competing sequence of bursts that could differ in source location but otherwise were identical to the target bursts. This task was possible only when the sources were heard as segregated streams. When the sound bursts had broad spectra, cats could detect the rhythm change when target and competing sources were separated by as little as 9.4°. Essentially equal levels of performance were observed when frequencies were restricted to a high, 4-to-25-kHz, band in which the principal spatial cues presumably were related to sound levels. When the stimulus band was restricted from 0.4 to 1.6 kHz, leaving interaural time differences as the principal spatial cue, performance was severely degraded. The frequency sensitivity of cats in this task contrasts with that of humans, who show better spatial stream segregation with low- than with high-frequency sounds. Possible explanations for the species difference includes the smaller interaural delays available to cats due to smaller sizes of their heads and the potentially greater sound-level cues available due to the cat's frontally directed pinnae and higher audible frequency range. PMID:26993807

  13. 1 in 10 Americans Has Experienced Ringing in the Ears

    Science.gov (United States)

    ... news/fullstory_160005.html 1 in 10 Americans Has Experienced Ringing in the Ears Study also found ... 21, 2016 (HealthDay News) -- One in 10 Americans has experienced ringing in the ears, a condition called ...

  14. Pediatric Obesity and Ear, Nose, and Throat Disorders

    Science.gov (United States)

    ... Calendar Find an ENT Doctor Near You Pediatric Obesity and Ear, Nose, and Throat Disorders Pediatric Obesity ... self-esteem, and isolation from their peers. Pediatric obesity and otolaryngic problems Otolaryngologists, or ear, nose, and ...

  15. The Nucleon as a Holographic Cheshire Cat

    OpenAIRE

    Zahed, Ismail

    2014-01-01

    The Cheshire cat principle emerges naturally from the holographic approach of the nucleon in terms of a bulk instanton. The cat hides in the holographic direction. I briefly review the one-nucleon problem in the holographic limit.

  16. The nucleon as a holographic Cheshire cat

    International Nuclear Information System (INIS)

    The Cheshire cat principle emerges naturally from the holographic approach of the nucleon in terms of a bulk instanton. The cat hides in the holographic direction. I briefly review the one-nucleon problem in the holographic limit

  17. Cerebral cysticercosis in a cat : clinical communication

    Directory of Open Access Journals (Sweden)

    E.V. Schwan

    2002-07-01

    Full Text Available The metacestode of Taenia solium, Cysticercus cellulosae, was recovered from the brain of a cat showing central nervous clinical signs ante mortem. This is the first record of cerebral cysticercosis in a cat in South Africa.

  18. Osteolysis in cat-scratch fever

    International Nuclear Information System (INIS)

    The osteolysis associated with cat-scratch fever resembles more ominous conditions. The combination of osteolysis and unilateral regional adenopathy in a child or adolescent should suggest cat-scratch disease. Bone scans and CT verified the diagnosis

  19. Dipylidium (Dog and Cat Flea Tapeworm) FAQs

    Science.gov (United States)

    ... if my pet has a tapeworm infection? Although cats and dogs are rarely ill as a result of a ... and outdoor environments. Have your veterinarian treat your dogs and cats promptly if they have tapeworms. Clean up after ...

  20. ServCat Document Selection Guidelines

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The ServCat document selection guidelines were developed for selecting appropriate documents to upload into ServCat. When beginning to upload documents into...

  1. Cholesterol granuloma presenting as a mass obstructing the external ear canal

    Directory of Open Access Journals (Sweden)

    Psifidis Dimosthenis

    2010-04-01

    Full Text Available Abstract Background Cholesterol granuloma (CG may involve the middle ear, the mastoid bone and the petrous apex. However, CG presenting as a mass obstructing the external ear canal (EEC is relatively rare and it can be a diagnostic challenge. Case Presentation We report a case of a CG occupying the mastoid antrum and presenting as a mass into the EEC. Temporal bone computerized tomography showed a soft tissue mass which eroded the posterior-superior bony wall of the EEC. On magnetic resonance imaging, the mass revealed a high signal on both T1 and T2-weighted images. The CG was removed by a mastoidectomy procedure and the histopathologic report confirmed the diagnosis of CG. A type III tympanoplasty was performed. Conclusions The postoperative course was uneventful.

  2. Dirac Cat States in Relativistic Landau Levels

    OpenAIRE

    Bermudez, A.; Martin-Delgado, M. A.; Solano, E.

    2007-01-01

    We show that a relativistic version of Schrodinger cat states, here called Dirac cat states, can be built in relativistic Landau levels when an external magnetic field couples to a relativistic spin 1/2 charged particle. Under suitable initial conditions, the associated Dirac equation produces unitarily Dirac cat states involving the orbital quanta of the particle in a well defined mesoscopic regime. We demonstrate that the proposed Dirac cat states have a purely relativistic origin and cease...

  3. Halal Cat Food for the World Market

    OpenAIRE

    Amir H.M.S; Razauden Z; Harisun Y; Ida I.M; Mona Z

    2014-01-01

    Currently, University Technology Malaysia (UTM) is engaged with a well-known private company in Malaysia to develop halal cat food for the world. A team of scientists from UTM was formed for the development of cat food from preparing palatants to producing canned cat and kibbled cat food formulation on a commercial scale to fulfil the vast market demand, as well as to act as contract manufacturer for this private company. Financial aid is made available by the university and Malaysian governm...

  4. Headaches from ear, nose and throat diseases

    Energy Technology Data Exchange (ETDEWEB)

    Reck, R.

    1984-08-01

    Headaches are a frequent symptom in ENT-patients. The complex sensory innervation of the ear, nose and paranasal sinuses is demonstrated. Heterotopic or referred pain must be differentiated from homotopic pain that is experienced at the point of injury. The nervous pathways of heterotopic otalgia are shown. The quality of pain of the most common rhinological and otological diseases is reported.

  5. Lewis Thomas and droopy rabbit ears

    OpenAIRE

    Bashyam, Hema

    2007-01-01

    In 1956, Lewis Thomas discovered that injecting rabbits with a plant protease called papain caused their ears to collapse. This experiment led to the identification of the endogenous proteases that cause the tissue destruction seen in diseases such as rheumatoid arthritis.

  6. Infrared tympanic temperature and ear canal morphology

    NARCIS (Netherlands)

    Daanen, H.A.M.

    2006-01-01

    Several publications indicate that the infrared tympanic temperature (IRTT) underestimates the core temperature of the body when the ear canal is long, curvy and narrow. In order to quantify these observations, a study was performed in 10 subjects. The IRTT was determined and compared to the oesopha

  7. The first neutron beam hits EAR2

    CERN Multimedia

    Antonella Del Rosso

    2014-01-01

    On 25 July 2014, about a year after construction work began, the Experimental Area 2 (EAR2) of CERN’s neutron facility n_TOF recorded its first beam. Unique in many aspects, EAR2 will start its rich programme of experimental physics this autumn.   The last part of the EAR2 beamline: the neutrons come from the underground target and reach the top of the beamline, where they hit the samples. Built about 20 metres above the neutron production target, EAR2 is in fact a bunker connected to the n_TOF underground facilities via a duct 80 cm in diameter, where the beamline is installed. The feet of the bunker support pillars are located on the concrete structure of the n_TOF tunnel and part of the structure lies above the old ISR building. A beam dump located on the roof of the building completes the structure. Neutrons are used by physicists to study neutron-induced reactions with applications in a number of fields, including nuclear waste transmutation, nuclear technology, nuclear astrop...

  8. Cats & Dogs%猫狗大战

    Institute of Scientific and Technical Information of China (English)

    阿萌

    2003-01-01

    @@ ( Dogs and cats are permanent enemies. A dog named Bubby is catnapped by the cats. The whole cats' world is shocked and alert. ) Dog Chairman: Gentlemen, a few moments ago I received word of the gravest nature. The key agent working the Brody case has been catnapped. Although he is safe, new must replace him as soon as possible.

  9. 14 CFR 67.105 - Ear, nose, throat, and equilibrium.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Ear, nose, throat, and equilibrium. 67.105..., nose, throat, and equilibrium. Ear, nose, throat, and equilibrium standards for a first-class airman... internal ear, nose, oral cavity, pharynx, or larynx that— (1) Interferes with, or is aggravated by,...

  10. Genitourinary dysplasia in a cat

    International Nuclear Information System (INIS)

    A six-month-old kitten had congenital urethral sphincter mechanism incompetence due to urethral hypoplasia and associated uterine hypoplasia and vaginal aplasia. Diagnosis was based on radiographic examination, surgical exploration and histological examination of the lower urinary tract. Surgical correction resulted in a marked clinical improvement. The cat became fully continent following treatment with phenylpropanolamine

  11. Lessons from the Cheshire Cat

    Science.gov (United States)

    Tinberg, Donna

    2012-01-01

    "If you don't know where you're going, any road will take you there." This oft-cited but not-quite-accurate quote is from the Lewis Carroll's classic children's tale, Alice in Wonderland. In Carroll's altered reality, the conversation between the disoriented Alice and the mysterious Cheshire Cat actually went like this: "Would you tell me, please,…

  12. A strange cat in Dublin

    Science.gov (United States)

    O'Raifeartaigh, Cormac

    2012-11-01

    Not many life stories in physics involve Nazis, illicit sex, a strange cat and the genetic code. Thus, a new biography of the great Austrian physicist Erwin Schrödinger is always of interest, and with Erwin Schrödinger and the Quantum Revolution, veteran science writer John Gribbin does not disappoint.

  13. Lymphoplasmacytic gingivitis in a cat

    OpenAIRE

    Baird, Kristin

    2005-01-01

    A 12-year-old male neutered short haired cat was presented due to difficulty eating and pawing at the face. Examination revealed severe gingivitis and stomatitis throughout the oral cavity. Gingival biopsy provided a diagnosis of lymphoplasmacytic stomatitis. Extraction of all premolars and molars resulted in elimination of all clinical signs.

  14. Cat-scratch disease osteomyelitis

    International Nuclear Information System (INIS)

    We report on a patient who presented with osteomyelitis of a rib and adjacent abscess as a rare and atypical manifestation of cat-scratch disease. Radiographic findings showed an osteolytic lesion with adjacent mass. Biopsy, serology and polymerase chain reaction technique are essential for the final diagnosis. Prognosis is excellent with full recovery. (orig.)

  15. Does the morphology of the ear of the Chinese bamboo rat (Rhizomys sinensis) show "Subterranean" characteristics?

    Science.gov (United States)

    Pleštilová, Lucie; Hrouzková, Ema; Burda, Hynek; Šumbera, Radim

    2016-05-01

    In spite of the growing interest in rodents with subterranean activity in general and the spalacids (Spalacidae) in particular, little is known about the biology of most members of this clade, such as the Chinese bamboo rat (Rhizomys sinensis). Here, we analyzed the ear morphology of R. sinensis with respect to hearing specialization for subterranean or aboveground modes of communication. It is well-known that ecology and style of life of a particular species can be reflected in morphology of its ear, its hearing and vocalization, so we expect that such information could provide us insight into its style of life and its sensory environment. The ratio between the eardrum and stapedial footplate areas, which influences the efficiency of middle ear sound transmission, suggests low hearing sensitivity, as is typical for subterranean species. The cochlea had 3.25 coils and resembled species with good low frequency hearing typical for subterranean mammals. The length of the basilar membrane was 18.9 ± 0.8 mm and its width slowly increased towards the cochlear apex from 60 to 85 μm. The mean density of outer hair cells was 344 ± 22 and of inner hair cells 114 ± 7.3 per 1 mm length of the organ of Corti, and increased apically. These values (except for relatively low hair cell density) usually characterize ears specialized for low frequency hearing. There was no evidence for an acoustic fovea. Apart of low hair cell density which is common in aboveground animals, this species has also relatively large auricles, suggesting the importance of sound localization during surface activity. The ear of the Chinese bamboo rat thus contains features typical for both aboveground and subterranean mammals and suggests that this spalacid has fossorial habits combined with regular aboveground activity. PMID:26880690

  16. Inner ear pressure changes following square wave intracranial or ear canal pressure manipulation in the same guinea pig

    NARCIS (Netherlands)

    Thalen, E; Wit, H; Segenhout, H; Albers, F

    2002-01-01

    Inner ear pressure was measured in scala tympani with a micropipette during square wave pressure manipulation of the intracranial compartment and, subsequently, of the external ear canal (EEC) in the same guinea pig. As expected, the combination of the cochlear aqueduct and the inner ear behaves as

  17. Dietary dissolution of urinary calculi in cats

    International Nuclear Information System (INIS)

    A young adult, castrated male DSH cat was admitted for pollakiuria, hematuria and dysuria. The cat was being fed a commercial dry grocery brand cat food. Radiographs demonstrated multiple radiodense cystic calculi and urinalysis showed hematuria but no crystalluria. A tentative diagnosis of struvite urolithiasis was made. The cat was fed s/d® Feline food exclusively. Clinical signs disappeared within a week and no calculi were visible radiographically within three weeks. s/d® Feline food was continued an additional two weeks. This case study shows that s/d® Feline therapeutic food can be used to successfully manage struvite urolithiasis in cats

  18. My Experience of Feeding a Cat

    Institute of Scientific and Technical Information of China (English)

    乔琳

    2006-01-01

    I liked cat very much. In my old opinion, cat was cute and gentle. One day, my friend asked me to feed the cat for him. So I went to his house in order to take care of his cat. His neighbor was an old woman. When I was doing some cleaning, the old woman asked me if I needed some help. Suddenly, the cat stretched out its sharp claws, and clawed me and bit me with its sharp teeth. WowA It was too abrupt. The old woman got scared. “It goes crazyA” I said and asked her to get out of the room, otherwise she woul...

  19. Middle East

    International Nuclear Information System (INIS)

    This document summarizes in a series of tables and graphs the energy profile of Middle East: production, imports, exports, stock change and consumption of crude oil and LNG, oil products, natural gas, coal and lignite, electricity, global primary consumption and energy balance. (J.S.)

  20. Feline asthma syndrome: a retrospective study of the clinical presentation in 29 cats

    International Nuclear Information System (INIS)

    Feline asthma syndrome (FAS) is a clinical condition characterised by recurrent bouts of coughing, wheezing and, or, dyspnoea. While the aetiology is unproven, the condition is believed to involve a type I immediate hypersensitivity reaction to inhaled allergens. In this paper the clinical data from 29 cats, where a diagnosis of FAS was made, are assessed retrospectively. The most common clinical presentation was recurrent bouts of coughing (n = 26) and dyspnoea (n = 21). Radiographic changes were noted in 24 cats, which included increased bronchial (n = 5), interstitial (n = 7) and mixed (n = 12) (bronchial and interstitial) patterns. Right middle lung lobe collapse was noted in two cats. Abnormal bronchial cytology was present in 16 cats. A predominant eosinophilic sample was collected in only three cats. There were minimal changes in differential white cell counts, and mild eosinophilia was found in only five cats. Prednisolone alone was the most effective therapy, although avoidance of putative aeroallergens and antibacterial therapy was effective in some. On the basis of the data from these cases it would appear that the diagnosis of FAS depends largely on the clinical presentation and radiographic findings. The value of ancillary tests in the diagnosis of FAS appears to be limited