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Fat plug myringoplasty  

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Fat plug myringoplasty is a technique described to repair small dry central tympanic membrane perforations. It is a simple office procedure with minimal morbidity to the patient. The present study is a prospective review of 18 patients who underwent 20 fat plug myringoplasty procedures over three and a half year penod. The success rate of 90% closure of tympanic membrane was achieved at an average of six months follow up. The patient selection criteria have to be adhered strictly to gain good...

2005-01-01

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Endoscopic vs microscopic myringoplasty: a different perspective.  

Science.gov (United States)

The objectives of this study were to ascertain the feasibility of transcanal endoscopic underlay myringoplasty using temporalis fascia and compare the results with microscopic myringoplasty. This prospective randomized trial included 60 patients with mucosal chronic otitis media with tympanic membrane perforations of all sizes and locations apart from posteriorly based small or moderate sized perforations. In the endoscopy group, 30 patients underwent exclusive transcanal myringoplasty using tympanomeatal flap elevation with underlay graft placement. In the microscopy group, 30 patients underwent myringoplasty using the postaural approach. Intra-operative variables compared were canalplasty and canal wall curettage for assessment of ossicular status. Graft uptake, hearing outcomes using pure tone audiometry and subjective cosmetic outcomes were assessed 24 weeks post-operatively and compared in the two groups. Resident feedback on the feasibility of endoscopic myringoplasty was obtained using a questionnaire. In the microscopy group, 5/30 patients required canalplasty due to canal overhangs and 4/30 required canal wall curettage for ossicular assessment, whereas none of the patients in the endoscopy group required these procedures. A graft uptake rate of 83.3 % was observed in both groups post-operatively after 24 weeks. Mean air-bone gap pre- and post-operatively in the endoscopy group was 28.5 and 18.13 dB, respectively, whereas these values were 32.4 and 16.9 dB, respectively, in the microscopy group. Subjective cosmetic outcomes were better in the endoscopy group. Resident feedback on endoscopic myringoplasty was positive. Endoscopic myringoplasty appears to be an effective alternative to microscopic myringoplasty and results in excellent hearing with good cosmetic outcomes. PMID:23999592

Lade, Himani; Choudhary, Santosha Ram; Vashishth, Ashish

2014-07-01

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Cyanoacrylate in myringoplasty - an office based procedure  

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Graft failure continues to be a problem for surgery of the perforated eardrum. We present our experience of six cases managed using commercially available superglue (cyanoacrylate) for myringoplasty. This method is simple, office based, less time consuming and cost effective. An insulin syringe was used to deliver the glue after a temporalis fascia graft was tucked under the edges of the perforation.

Albert, R. R. A.; Job, A.

2004-01-01

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Dermis fat grafting in contracted socket  

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Full Text Available 5 cases of severely contracted sockets were recon-structed with the use of dermis-fat graft. This type of graft is extremely useful as it is more viable and is a suitable replacement for soft tissue deficiency as in case of contracted socket. Excellent results were obtained and this method seems to be the method of choice in the manage-ment of such cases.

Betharia S

1988-01-01

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A STUDY ON EFFICACY OF AUTOLOGOUS PLATELET RICH PLASMA IN MYRINGOPLASTY  

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Objective: To study the efficacy and advantage in using autologus platelet rich plasma during myringoplasty in closure of tympanic membrane perforation preventing the graft displacement, promoting quicker healing & improving overall outcome.Methods : Platelet rich plasma(PRP) is an autologus platelet rich concentrate prepared from patients own blood with growth factors up to 8 times that of normal serum and its efficacy when used during myringoplasty is studied.50 patients with chronic oti...

2013-01-01

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Success rate of myringoplasty at Groote Schuur Hospital  

Scientific Electronic Library Online (English)

Full Text Available SciELO South Africa | Language: English Abstract in english OBJECTIVES: The aim of this study was to determine the success rate of myringoplasty surgery performed at Groote Schuur Hospital and to evaluate some of the presumed prognostic factors. DESIGN: The study design was a retrospective analytical cohort. SETTING: Groote Schuur Hospital (tertiary medical [...] centre), Cape Town. SUBJECTS: This study assessed the success rate of 341 myringoplasty operations performed by surgeons in the Department of Otolaryngology from January 2005 to December 2009. OUTCOME MEASURES: An unsuccessful operation was classified as a residual perforation seen at the 3-month follow-up visit that remained present at all subsequent visits. Presumed prognostic factors such as the rank of the surgeon, size of the perforation, location of the perforation, graft used and whether it was a revision procedure, were also evaluated. Where possible, the audiometric gain following surgery was calculated. RESULTS: The overall success rate in terms of an intact tympanic membrane following myringoplasty was 71%. The average improvement in pure tone average following myringoplasty was 12.4 dB. In 64% of patients, socially acceptable hearing levels were present postoperatively (air-conduction of less than 30 dB). None of the presumed prognostic factors was a statistically significant determinant (p>0.05). CONCLUSION: The success rate for myringoplasty (in terms of perforation closure) of 71% at Groote Schuur Hospital compares well with that quoted in the literature. There is no ethical dilemma from a surgical outcomes perspective of registrars performing myringoplasties.

Juanita, Becker; Darlene, Lubbe.

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A STUDY ON EFFICACY OF AUTOLOGOUS PLATELET RICH PLASMA IN MYRINGOPLASTY  

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Full Text Available Objective: To study the efficacy and advantage in using autologus platelet rich plasma during myringoplasty in closure of tympanic membrane perforation preventing the graft displacement, promoting quicker healing & improving overall outcome.Methods : Platelet rich plasma(PRP is an autologus platelet rich concentrate prepared from patients own blood with growth factors up to 8 times that of normal serum and its efficacy when used during myringoplasty is studied.50 patients with chronic otitis media inactive mucosal disease were randomly chosen and 25 of them was the study group and other 25 were the control group. Both group patients underwent myringoplasty and PRP was used in the study group and the results were evaluated.Results: In our study among 25 cases that underwent myringoplasty with use of platelet rich fibrin, 24 had complete tympanic membrane closure and only one failure has been noticed. In controls 5 out of 25 cases had failure. The graft take up rate in our study is comparable with the reference studies. Use of PRP accelerates graft uptake.Conclusion: Platelet rich plasma is a cheap and cost effective platelet concentrate with enriched growth factors. It accelerates the tympanic membrane closure following myringoplasty.

Sankaranarayanan Gopalakrishnan

2013-06-01

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A Study on Outcome of Underlay, Overlay and Combined Techniques of Myringoplasty  

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Myringoplasty is a procedure which deals on repair of the tympanic membrane. This procedure can be done via postaural, endaural or endomeatal route. Various grafts such as temporalis fascia, vein graft, perichondrium are used. The technique can be categorized as underlay, overlay, interlay or its combination depending on the placement of the graft material. This study was done to compare underlay, overlay and combined technique in terms of the closure of the membrane defect, postoperative com...

2012-01-01

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Facial fat grafting with a prototype injection control device  

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Hugh E Hetherington,1 Jon E Block2 1Bozeman Deaconess Health Group, Bozeman, MT, USA; 2The Jon Block Group, San Francisco, CA, USA Objective: To evaluate the initial clinical performance of a prototype injection control device (ICD) to facilitate fat grafting by injection. Methods: An ICD, which mechanically couples the act of withdrawing the cannula with the act of depressing the plunger, was fabricated for the purpose of facial fat grafting. The action of the device results in deposition of...

2013-01-01

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Magnetic resonance imaging of autologous fat grafting  

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A 30-year-old female patient with isolated facial lipodystrophy underwent two sessions of fat injection. MR signals of injected fat at different injection ages were compared to native fat. Native T1 signal was smaller for transplant fat, probably due to a slightly lower fat content and/or fibrosis or due to higher perfusion. T2 signal of transplants was significantly higher than that of native fat. T1 post-contrast was also higher, and contrast uptake of transplanted fat increased slightly with transplant age, which could be explained by an increasing perfusion. This study demonstrates the differences and MR signal time changes of native and transplanted fat. (orig.)

Goehde, Susanne C.; Kuehl, Hilmar; Ladd, Mark E. [University Hospital Essen, Department of Diagnostic and Interventional Radiology, Essen (Germany)

2005-12-01

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Free epidural fat-grafting after lumbar laminectomy using MRI  

International Nuclear Information System (INIS)

Free epidural fat-grafting was performed to prevent adhesion between scar tissue of the epidural space and dura and nerve root after lumbar laminectomy. The results were evaluated using MRI. Fifteen cases were operated upon with an average follow-up period of 7.5 months. MRI was recorded and the findings were classified into four types as follow: I, equally high signal case; II, slight fibrosis case; III, severe fibrosis case; IV, high signal disappeared case. The results showed 3 cases of type I, 7 cases of type II, 3 cases of type III, and 2 cases of type IV. According to MRI findings, free epidural fat is supposed to be still viable and alive, although slightly fibroses but the dural side remains a high signal area. Free epidural fat-grafting was useful for preventing adhesion around the epidural space. There was high relationship to age and sex with regard to viability of the free fat graft. (author)

1994-09-01

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Breast Fistula Repair after Autologous Fat Graft: A Case Report  

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We report the case of a 55-year-old female patient who attended our clinic for the presence of a scar retraction in the upper pole of the left breast as a complication of breast augmentation. In the scar area, we observed an orifice that probing revealed to be a fistula. The patient was referred to surgical intervention under general anesthesia to obtain scar contracture release using autologous fat graft; one month after autologous fat injection, following healing of the fistula, the patient...

Klinger, Francesco Maria; Caviggioli, Fabio; Forcellini, Davide; Vinci, Valeriano; Maione, Luca; Pajardi, Giorgio; Klinger, Marco

2011-01-01

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Breast fistula repair after autologous fat graft: a case report  

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We report the case of a 55-year-old female patient who attended our clinic for the presence of a scar retraction in the upper pole of the left breast as a complication of breast augmentation. In the scar area, we observed an orifice that probing revealed to be a fistula. The patient was referred to surgical intervention under general anesthesia to obtain scar contracture release using autologous fat graft; one month after autologous fat injection, following healing of the fistula, the patient...

Klinger, Marco Ettore Attilio; Caviggioli, Fabio; Forcellini, Davide; Vinci, Valeriano; Maione, Luca; Pajardi, Giorgio Eugenio

2011-01-01

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Lipoenxertia em reconstrução mamária / Fat grafting in breast reconstruction  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese INTRODUÇÃO: Frequentemente, a reconstrução mamária requer um segundo tempo cirúrgico para corrigir visíveis irregularidades no contorno da mama. A lipoenxertia constitui-se em uma técnica cirúrgica que pode melhorar ou corrigir essas deformidades em substituição a outras técnicas convencionais de ma [...] ior morbidade ou complexidade. O objetivo deste estudo é demonstrar um método de correção de defeitos de contorno de mamas reconstruídas previamente pelas técnicas convencionais com enxerto de gordura, após 8 anos de experiência. MÉTODO: Todas as pacientes incluídas neste estudo foram previamente submetidas a mastectomia (total ou parcial) e a algum tipo de reconstrução mamária. A gordura foi obtida por meio de método clássico de lipoaspiração com seringa, delicadamente lavada com solução salina em uma peneira de aço inoxidável, decantada em uma seringa de 60 cc e enxertada após alguns minutos. RESULTADOS: Foram operadas 112 pacientes no período de 2005 a 2012. Houve 1 (8,9%) caso de perda total do enxerto de gordura, 22 (19,6%) pacientes apresentaram pequenos nódulos palpáveis, o volume médio enxertado foi de 100 cc e foram necessários múltiplos procedimentos para se alcançar o volume desejado. CONCLUSÕES: A lipoenxertia constitui-se em uma técnica segura, com baixa morbidade e altos índices de satisfação do cirurgião e das pacientes, apesar de necessitar de múltiplos procedimentos cirúrgicos para atingir bom resultado. Abstract in english BACKGROUND: Breast reconstruction often requires a second surgical procedure to correct visible irregularities of the breast contour. Lipofilling (fat grafting) consists of a surgical technique that improves or corrects such deformities, and serves as an alternative to other conventional techniques [...] that have higher morbidity rates and complexity. In the present study, we aimed to describe our 8-year experience with a fat grafting method for correcting contour deformities of breasts that were previously reconstructed using conventional techniques. METHODS: All patients in this study previously underwent mastectomy (total or partial) and some degree of breast reconstruction. The fat was obtained by liposuction using a syringe, and was gently rinsed with a saline solution in a stainless steel sieve, poured into a 60 cc syringe, and grafted after a few minutes. RESULTS: In total, 112 patients underwent surgery between 2005 and 2012. There was one (8.9%) case of total loss of the fat graft, while 22 (19.6%) patients had small palpable nodules. The average graft volume was 100 cc, and multiple procedures were required to achieve the desired volume. CONCLUSIONS: Fat grafting is a safe technique with low morbidity rates that demonstrates high surgeon and patient satisfaction levels, despite the need for multiple procedures to achieve good results.

Bezerra, Francisco José Fontenele; Moura, Rosely Moraes Gonçalves de; Maia Neto, José Dalvo.

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Facial fat grafting with a prototype injection control device  

Directory of Open Access Journals (Sweden)

Full Text Available Hugh E Hetherington,1 Jon E Block2 1Bozeman Deaconess Health Group, Bozeman, MT, USA; 2The Jon Block Group, San Francisco, CA, USA Objective: To evaluate the initial clinical performance of a prototype injection control device (ICD to facilitate fat grafting by injection. Methods: An ICD, which mechanically couples the act of withdrawing the cannula with the act of depressing the plunger, was fabricated for the purpose of facial fat grafting. The action of the device results in deposition of consistent threads of fat having a volume of approximately 33 uL per cm that the cannula is withdrawn, which is slightly less than the internal volume of a 12-gauge cannula. A total of 26 patients underwent 30 procedures, and the results were subjectively evaluated using pre- and postoperative photographs, with a minimum follow-up of 4 months. Results: The desired degree of correction was more consistent, recovery was faster, and procedural efficiency was improved when performing the procedure with the ICD compared to historical use of the manual method of injection. Minor irregularities were the only complications encountered. Conclusion: The ICD optimally distributes fat as a uniform thread along the withdrawal tract of the cannula, thereby eliminating clumping and minimizing tissue trauma, resulting in reduced recovery time as well as more consistent and predictable clinical results. Since the ICD automates the injection process, it provides a notable and easily attainable efficiency in procedural time and minimal learning curve for the user. Keywords: dermal fillers, liposuction, facial rejuvenation, threading

Hetherington HE

2013-09-01

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Chorda tympani nerve function after myringoplasty.  

Science.gov (United States)

This is a cross-sectional study design aimed to determine the prevalence of Chorda Tympani Nerve (CTN) injury and related symptoms following myringoplasty. Thirty patients were included in this study. The methods used were measuring taste thresholds using electrogustometer to map taste threshold on the anterior two-third of the tongue on the operated side with the non operated side as the control. Reading is taken when the subject experiences sour/metallic taste. All corresponding threshold values and findings were recorded and compared to control. Results showed 50% of patients had elevated threshold levels suggestive of CTN injury. However, none of the patients reported subjective taste loss. This study concludes that the prevelance rate of CTN injury in post myringoplasty patients is about 50% but this is not associated with altered taste sensation. PMID:18705465

Sham, E H; Prepageran, N; Raman, R; Quek, K F

2007-12-01

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Improving fat graft survival through preconditioning of the recipient site with microneedling.  

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Although fat grafts are considered the ideal soft-tissue fillers, the main concern dealing with this technique is not being able to predict long-term graft survival due to high absorption rates. The purpose of this study was to investigate the angiogenic effects of preconditioning the recipient area with micro-needling and to determine its overall impact on fat graft survival. The study consisted of a sham, control and study group. The source of fat was the Wistar albino rat inguinal fat pad while the recipient area was a dorsal subcutaneous pouch. The dorsal area was preconditioned with standard technique micro-needling 1-week prior to fat graft transfer in the study group while the control group did not undergo micro-needling. At the end of 15 weeks, morphological, biochemical, histological and immunohistochemical evaluation was carried out. Fat grafts in the study group had better integrity and a higher level of vascularity compared to the control group. Volume analysis demonstrated higher graft survival in the study group in comparison to the control group. Histomorphometric and immunohistochemical evaluation showed better graft integrity and uniform adipocytes, less fibrosis, less vacuolisation and inflammation and better vascularisation in the study group. Although higher triglyceride concentrations were measured for the study group, the difference between the two groups was statistically insignificant. In conclusion, fat grafting performed in an area preconditioned with micro-needling results in higher graft volume, better integrity and vascularisation and an overall higher graft survival rate. PMID:24529693

Sezgin, Billur; Ozmen, Selahattin; Bulam, Hakan; Omeroglu, Suna; Yuksel, Seher; Cayci, Banu; Peker, Tuncay

2014-05-01

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CT image of a free fat graft (FFG) within hemilaminectomy space  

International Nuclear Information System (INIS)

To prevent scarformation after hemilaminectomy many authors use free autologous fat grafts. CT scanning reveals vitality or death of the transplant. CT enables to control intra vitam whether FFG diminishes postnucleotomy syndrom caused by scar formation. (orig.)

1982-01-01

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Soft tissue augmentation with autologous fat graft: The dissected pouch technique  

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Background: Soft tissue augmentation with autologous fat graft has been increasingly used by plastic surgeons despite unpredictable results. Several techniques have been described to prevent the main setback of this technique, fat graft resorption. However, there is no ideal technique described for this purpose. Materials and Methods: Twenty patients with subcutaneous tissue loss, atrophy or hypoplasia were treated with lipofilling. A subcutaneous pouch is dissected at the de...

Livaoglu Murat; Yavuz Ercan

2009-01-01

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Soft tissue augmentation with autologous fat graft: The dissected pouch technique  

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Full Text Available Background: Soft tissue augmentation with autologous fat graft has been increasingly used by plastic surgeons despite unpredictable results. Several techniques have been described to prevent the main setback of this technique, fat graft resorption. However, there is no ideal technique described for this purpose. Materials and Methods: Twenty patients with subcutaneous tissue loss, atrophy or hypoplasia were treated with lipofilling. A subcutaneous pouch is dissected at the deformed area and later it is filled with autologous fat graft. Results: Graft maintenance during the postoperative period was satisfactory. Overcorrection was not performed except for the first three cases. Patient, surgeon and layman satisfaction was surveyed. Satisfaction was rated between 0 and 10. The mean score was 7.67 ± 1.22. Conclusion: The authors describe a technique for soft tissue augmentation which effectively corrects contour deformities, provides a low resorption rate and a relatively non-visible scar without causing irregularities.

Livaoglu Murat

2009-01-01

 
 
 
 
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Application of fascia of the temporal muscle and cartilage of the auricular tragus in myringoplasty in children  

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Full Text Available Introduction. Perforation of the tympanic membrane in children may be the cause of recurrent middle ear infection and loss of hearing. Objective. The aim of this study was to analyze the application of different reconstructive materials in surgical technique myringoplasty. Methods. We performed 88 myringoplasties due to auricular tragus perforation in 76 children (aged 4 to 16 years, mean 11.9 years from July 2001 to July 2009. Age, gender, size and the site of perforation, status of the contra lateral ear, underlying cause of the perforations, surgical technique, preoperative and postoperative hearing levels and postoperative complications were recorded and analyzed. In performing myringoplasty we used fascia of the temporal muscle and cartilage of the auricular tragus. Results. In 43 (48% patients we used fascia of the temporal muscle and in 45 (52% cartilage of the auricular tragus. Graft success was defined as an intact eardrum at 12 months postoperatively and improvement in the perception of air-bone gap of 10 dB, which we recorded in 73 (83% cases. Re-perforations were recorded in 12 (13% patients, of whom in 8 (18.6% cases we used the temporal fascia and in 4 (9.3% cases a tragal cartilage. Retraction of the tympanic membrane was recorded in 3 (4% cases with the temporal fascia. Conclusion. Myringoplasty is a reasonably successful method with good functional results in pediatric patients. Risk factors of surgical failure are young age, the size of auricular tragus perforation and pathological conditions of the contra lateral ear. The tragal cartilage gives better results in cases with bilateral perforations because the possibility of retractions and re-perforations is lower. Relatively small number of patients is probably the reason that, except for young age, differences between the two groups did not reach the level of statistical significance.

Baljoševi? Ivan

2012-01-01

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Effects of the Diabetic Condition on Grafted Fat Survival: An Experimental Study Using Streptozotocin-Induced Diabetic Rats  

Science.gov (United States)

Background Autologous fat grafts have been widely used for cosmetic purposes and for soft tissue contour reconstruction. Because diabetes mellitus is one of the major chronic diseases in nearly every country, the requirement for fat grafts in diabetes patients is expected to increase continuously. However, the circulation complications of diabetes are serious and have been shown to involve microvascular problems, impairing ischemia-driven neovascularization in particular. After injection, revascularization is vital to the survival of the grafted fat. In this study, the authors attempted to determine whether the diabetic condition inhibits the survival of injected fat due to impaired neovascularization. Methods The rat scalp was used for testing fat graft survival. Forty-four seven-week-old male Sprague-Dawley rats were allocated to a diabetic group or a control group. 1.0 mL of processed fat was injected subcutaneously into the scalp of each rat. The effect of diabetes was evaluated by calculating the volume and the weight of the grafted fat and by histologically analyzing the fat sections. Results The surviving fat graft volume and weight were considerably smaller in the diabetic group than in the control group (P<0.05), and histological evaluations showed less vascularity, and more cysts, vacuoles, and fibrosis in the diabetic group (P<0.05). Cellular integrity and inflammation were not considerably different in the two groups. Conclusions As the final outcome, we found that the presence of diabetes might impair the survival and the quality of fat grafts, as evidenced by lower fat graft weights and volumes and poor histologic graft quality.

Jung, Jae A; Kim, Yang Woo; Cheon, Young Woo

2014-01-01

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Myringoplasty in children: retrospective analysis of 35 cases Miringoplastia em crianças: análise retrospectiva de 35 casos  

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Full Text Available AIMS: to carry out a retrospective analysis of myringoplasty results in children in our institute. MATERIALS AND METHODS:Thirty five children, 9 to 14 years old, who underwent myringoplasty in our hospital between April 2002 and May 2004, formed the study group. Data regarding successful perforation closure, factors influencing success rates and hearing improvement were recorded. RESULTS: Closure of perforation was successful in 30 (85.7% of the 35 patients. Graft take failure occurred in 5 patients. Audiological improvement was seen in 27 (77% patients, out of which 23 cases had 10-15 db and 4 cases had 15-20 db air-bone gap. Hearing was found to be worse postoperatively in 3 patients, while no change was noted in the remaining 5 patients. There was no case of profound hearing loss. CONCLUSION: Myringoplasty is a beneficial procedure in the pediatric population in the hands of a skilled and experienced surgeons. If performed properly, it has a good chance of restoring a child's hearing. However, a large study with a long follow up is warranted in order to come to a definitive conclusion.OBJETIVOS: fazer uma análise retrospectiva dos resultados de miringoplastia em crianças em nosso instituto. MATERIAIS E MÉTODOS: Trinta e cinco crianças com idades entre 9 e 14 anos, que sofreram miringoplastia em nosso hospital, entre abril de 2002 e maio de 2004 formaram o Grupo de Estudo. Registramos os dados relacionados a fechamento bemsucedido da perfuração, fatores que influenciaram a taxa de sucesso e melhorias na audição. RESULTADOS: O fechamento bem-sucedido da perfuração ocorreu em 30 (85,7% dos 35 pacientes. Falha na "pega" do enxerto ocorreu em 5 pacientes. A melhoria auditiva aconteceu em 27 (77% pacientes, dos quais 23 tiveram gap aéreo-ósseo entre 10-15 db e 4 tiveram esse gap entre 15-20 db. A audição pós-operatória piorou em 3 pacientes, e em 5 não houve alteração a esse respeito. Não houve casos de perda auditiva profunda. CONCLUSÃO: A miringoplastia é um procedimento benéfico na população pediátrica nas mãos de cirurgiões habilidosos e experientes. Se conduzida adequadamente, ela tem boas possibilidades de restaurar a audição da criança. Entretanto, precisamos ainda de um estudo maior, com acompanhamento mais longo para podermos chegar a uma conclusão mais definitiva.

Nemer Al-Khtoum

2009-06-01

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Myringoplasty in children: retrospective analysis of 35 cases / Miringoplastia em crianças: análise retrospectiva de 35 casos  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese OBJETIVOS: fazer uma análise retrospectiva dos resultados de miringoplastia em crianças em nosso instituto. MATERIAIS E MÉTODOS: Trinta e cinco crianças com idades entre 9 e 14 anos, que sofreram miringoplastia em nosso hospital, entre abril de 2002 e maio de 2004 formaram o Grupo de Estudo. Registr [...] amos os dados relacionados a fechamento bemsucedido da perfuração, fatores que influenciaram a taxa de sucesso e melhorias na audição. RESULTADOS: O fechamento bem-sucedido da perfuração ocorreu em 30 (85,7%) dos 35 pacientes. Falha na "pega" do enxerto ocorreu em 5 pacientes. A melhoria auditiva aconteceu em 27 (77%) pacientes, dos quais 23 tiveram gap aéreo-ósseo entre 10-15 db e 4 tiveram esse gap entre 15-20 db. A audição pós-operatória piorou em 3 pacientes, e em 5 não houve alteração a esse respeito. Não houve casos de perda auditiva profunda. CONCLUSÃO: A miringoplastia é um procedimento benéfico na população pediátrica nas mãos de cirurgiões habilidosos e experientes. Se conduzida adequadamente, ela tem boas possibilidades de restaurar a audição da criança. Entretanto, precisamos ainda de um estudo maior, com acompanhamento mais longo para podermos chegar a uma conclusão mais definitiva. Abstract in english AIMS: to carry out a retrospective analysis of myringoplasty results in children in our institute. MATERIALS AND METHODS:Thirty five children, 9 to 14 years old, who underwent myringoplasty in our hospital between April 2002 and May 2004, formed the study group. Data regarding successful perforation [...] closure, factors influencing success rates and hearing improvement were recorded. RESULTS: Closure of perforation was successful in 30 (85.7%) of the 35 patients. Graft take failure occurred in 5 patients. Audiological improvement was seen in 27 (77%) patients, out of which 23 cases had 10-15 db and 4 cases had 15-20 db air-bone gap. Hearing was found to be worse postoperatively in 3 patients, while no change was noted in the remaining 5 patients. There was no case of profound hearing loss. CONCLUSION: Myringoplasty is a beneficial procedure in the pediatric population in the hands of a skilled and experienced surgeons. If performed properly, it has a good chance of restoring a child's hearing. However, a large study with a long follow up is warranted in order to come to a definitive conclusion.

Nemer, Al-Khtoum; Mohammad Ali, Hiari.

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Lipoenxertia nas mamas: procedimento consagrado ou experimental? / Breast fat grafting: experimental or established procedure?  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Atualmente vem ocorrendo aumento da incidência de utilização de enxertia de gordura para correção de defeitos mamários congênitos ou adquiridos e para tratamento mamário estético. Esse aumento é decorrente do surgimento de novas técnicas de lipoenxertia, que produzem resultados mais duradouros e con [...] fiáveis, apesar da crença de alguns autores de que o procedimento possa dificultar o rastreamento do câncer mamário. Esta revisão de literatura tem como objetivo identificar as técnicas de lipoenxertia mamárias mais utilizadas, avaliá-las quanto à eficácia e à segurança, e relatar as principais complicações associadas. A revisão foi realizada nas bases de dados PubMed e LILACS, e os fatores de inclusão foram: artigos em idioma inglês, publicados nos últimos cinco anos. Como resultado observou-se aumento do número de trabalhos abordando o tema nos últimos anos, e predomínio de uma técnica de lipoenxertia específica. A maioria dos trabalhos demonstra que a lipoenxertia mamária não prejudica o rastreamento radiológico para câncer mamário, e alguns sugerem que a gordura enxertada potencializa o desenvolvimento de câncer nas mamas. Apesar do aumento do número de trabalhos, existem ainda poucos com bom nível de evidência científica. Esta revisão permitiu concluir que a lipoenxertia é uma técnica alternativa para reparação de defeitos mamários e discreto aumento estético das mamas, devendo ser utilizada por cirurgiões com treinamento adequado e acompanhada por equipe de radiologia experiente em imagenologia mamária. Mais trabalhos com metodologia científica adequada são necessários para avaliar a lipoenxertia mamária. Abstract in english There has recently been an increase in the use of fat grafting for the correction of congenital or acquired breast deformities and for aesthetic breast treatment. This increase is due to the emergence of novel fat grafting techniques that produce lasting and reliable results despite some authors' be [...] liefs that the procedure might hinder breast cancer screening. This literature review aims to identify the most frequently used breast fat grafting techniques, evaluate their efficacy and safety, and report their major complications. The review was performed after a search in the PubMed and LILACS databases, and only English-language articles published over the past 5 years were assessed. There have been an increased number of studies on the topic in recent years, and a specific fat grafting technique has been primarily reported. Most studies in this area have shown that breast fat grafting does not affect radiological breast cancer screening, whereas some studies have suggested that the use of grafted fat may enhance the development of breast cancer. Despite the increased number of published studies, few have a good level of scientific evidence. This review concludes that fat grafting is an alternative technique for the correction of breast deformities and moderate aesthetic breast enlargement and should be performed by properly trained surgeons accompanied by a radiology team that is experienced in breast imaging. Further studies with appropriate scientific methodologies are needed to evaluate breast fat grafting.

Blumenschein, Alexandre Roriz; Freitas-Junior, Ruffo; Tuffanin, Andrea Thomazine; Blumenschein, Danielle Isadora.

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Coronoidectomy, masticatory myotomy and buccal fat pad graft in management of advanced oral submucous fibrosis.  

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The purpose of this study is to evaluate coronoidectomy, masticatory myotomy and buccal fat pad graft in advanced (Stage III-IV) oral sub mucous fibrosis (OSF). 10 patients with clinically and histologically confirmed advanced OSF underwent surgery entailing bilateral coronoidectomy, masticatory muscle myotomy and closure with a pedicled buccal fat pad graft followed by vigorous mouth opening exercises. The result was evaluated using the interincisal distance at maximum mouth opening as the objective outcome measure over a follow up period of 12 months. Results showed a mean interincisal opening of 14.7 mm preoperatively and 32.5 mm at 12 months postoperatively. Relapse was encountered in one patient who did not cooperate with the postoperative exercise regime. Results suggest this regime is effective. PMID:22551649

Kothari, M C; Hallur, N; Sikkerimath, B; Gudi, S; Kothari, C R

2012-11-01

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Lipoenxertia nas mamas: procedimento consagrado ou experimental? Breast fat grafting: experimental or established procedure?  

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Full Text Available Atualmente vem ocorrendo aumento da incidência de utilização de enxertia de gordura para correção de defeitos mamários congênitos ou adquiridos e para tratamento mamário estético. Esse aumento é decorrente do surgimento de novas técnicas de lipoenxertia, que produzem resultados mais duradouros e confiáveis, apesar da crença de alguns autores de que o procedimento possa dificultar o rastreamento do câncer mamário. Esta revisão de literatura tem como objetivo identificar as técnicas de lipoenxertia mamárias mais utilizadas, avaliá-las quanto à eficácia e à segurança, e relatar as principais complicações associadas. A revisão foi realizada nas bases de dados PubMed e LILACS, e os fatores de inclusão foram: artigos em idioma inglês, publicados nos últimos cinco anos. Como resultado observou-se aumento do número de trabalhos abordando o tema nos últimos anos, e predomínio de uma técnica de lipoenxertia específica. A maioria dos trabalhos demonstra que a lipoenxertia mamária não prejudica o rastreamento radiológico para câncer mamário, e alguns sugerem que a gordura enxertada potencializa o desenvolvimento de câncer nas mamas. Apesar do aumento do número de trabalhos, existem ainda poucos com bom nível de evidência científica. Esta revisão permitiu concluir que a lipoenxertia é uma técnica alternativa para reparação de defeitos mamários e discreto aumento estético das mamas, devendo ser utilizada por cirurgiões com treinamento adequado e acompanhada por equipe de radiologia experiente em imagenologia mamária. Mais trabalhos com metodologia científica adequada são necessários para avaliar a lipoenxertia mamária.There has recently been an increase in the use of fat grafting for the correction of congenital or acquired breast deformities and for aesthetic breast treatment. This increase is due to the emergence of novel fat grafting techniques that produce lasting and reliable results despite some authors' beliefs that the procedure might hinder breast cancer screening. This literature review aims to identify the most frequently used breast fat grafting techniques, evaluate their efficacy and safety, and report their major complications. The review was performed after a search in the PubMed and LILACS databases, and only English-language articles published over the past 5 years were assessed. There have been an increased number of studies on the topic in recent years, and a specific fat grafting technique has been primarily reported. Most studies in this area have shown that breast fat grafting does not affect radiological breast cancer screening, whereas some studies have suggested that the use of grafted fat may enhance the development of breast cancer. Despite the increased number of published studies, few have a good level of scientific evidence. This review concludes that fat grafting is an alternative technique for the correction of breast deformities and moderate aesthetic breast enlargement and should be performed by properly trained surgeons accompanied by a radiology team that is experienced in breast imaging. Further studies with appropriate scientific methodologies are needed to evaluate breast fat grafting.

Alexandre Roriz Blumenschein

2012-12-01

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Safety concern between autologous fat graft, mesenchymal stem cell and osteosarcoma recurrence.  

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BACKGROUND: Osteosarcoma is the most common malignant primary bone tumour in young adult treated by neo adjuvant chemotherapy, surgical tumor removal and adjuvant multidrug chemotherapy. For correction of soft tissue defect consecutive to surgery and/or tumor treatment, autologous fat graft has been proposed in plastic and reconstructive surgery. PRINCIPAL FINDINGS: We report here a case of a late local recurrence of osteosarcoma which occurred 13 years after the initial pathology and 18 mont...

2010-01-01

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Breast reconstruction de novo by water-jet assisted autologous fat grafting - a retrospective study  

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Background: Autologous fat grafting has become a frequent, simple, reproducible and low-risk technique for revisional or partial breast reconstruction. The presented European multicenter study describes an optimized treatment and follow-up protocol for the de novo breast reconstruction after total mastectomy by lipotransfer alone.Methods: A retrospective European multicenter trial included 135 procedures on 28 (35 breasts) postmastectomy patients (mean 52.4 years). All women were treated wi...

Hoppe, Dl; Ueberreiter, K.; Surlemont, Y.; Peltoniemi, H.; Stabile, M.; Kauhanen, S.

2013-01-01

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Management of an irradiated anophthalmic socket following dermis-fat graft rejection: A case report  

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Full Text Available Dermis-fat graft (DFG is often the only promising option in cases of severely contracted sockets. However, there is an increased risk of graft failure in irradiated sockets with decreased vascularity. In such difficult cases, repeat DFG implantation also has higher risks of graft failure. We describe an ingenious method of successful management of an irradiated anophthalmic socket following DFG infection and necrosis, with acceptable cosmetic results. At surgery, an orbital impression was taken with ophthalmic grade alginate. Based on this measurement, a custom-made stem pressure socket-expander made up of high density polymethyl methacrylate (PMMA was fitted, a week post surgery and kept in situ for six weeks. On review, the fornices had considerably deepened. The expander device was removed and the patient was now fitted with a custom-made thicker prosthesis made up of high-density PMMA. The patient has followed up for a year subsequently and the prosthesis has remained stable.

Raizada Kuldeep

2008-01-01

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Autologous fat grafting: use of closed syringe microcannula system for enhanced autologous structural grafting  

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Robert W Alexander,1 David Harrell2 1Department of Surgery, School of Medicine and Dentistry, University of Washington, Seattle, WA, USA; 2Harvest-Terumo Inc, Plymouth, MA, USA Objectives: Provide background for use of acquiring autologous adipose tissue as a tissue graft and source of adult progenitor cells for use in cosmetic plastic surgery. Discuss the background and mechanisms of action of closed syringe vacuum lipoaspiration, with emphasis on accessing adipose-derived mesenchymal/stroma...

2013-01-01

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Fat grafting's past, present, and future: why adipose tissue is emerging as a critical link to the advancement of regenerative medicine.  

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Fat grafting is a common reconstructive and aesthetic procedure with extensive clinical applications. Recently, significant strides have been made in investigating the biology behind the success of this procedure. Surgeons and scientists alike have advanced this field by innovating fat graft harvesting and injection techniques, expanding the use of adipose tissue and its stem cell components, and broadening our understanding of the viability of fat grafting at the molecular and cellular levels. The objectives of this review are to (1) discuss the clinical applications of fat grafting, (2) describe the cellular biology of fat and the optimization of fat graft preparation, (3) illustrate the significance of adipose-derived stem cells and the potentiality of fat cells, (4) highlight the clinical uses of adipose-derived stem cells, and (5) explore the current and future frontiers of the study of fat grafting. Although collaborative knowledge has increased exponentially, many of the biological mechanisms behind fat grafting are still unknown. Plastic surgeons are in a unique position to pioneer both the scientific and clinical frontiers of fat grafting and to ultimately further this technology for the benefit of our patients. PMID:22942117

Hsu, Vivian M; Stransky, Carrie A; Bucky, Louis P; Percec, Ivona

2012-09-01

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A Comparative Translational Study: The Combined Use of Enhanced Stromal Vascular Fraction and Platelet-Rich Plasma Improves Fat Grafting Maintenance in Breast Reconstruction  

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The use of autologous fat grafting is ideal in breast reconstruction. However, published data on long-term outcomes and instrumental results of fat grafting to the breast are lacking. The purpose of this study was to review the authors' experience of fat grafting, evaluating the effects related to the use of enhanced stromal vascular fraction (e-SVF) and fat grafting with platelet-rich plasma (PRP) in the maintenance of fat volume in breast reconstruction, comparing the results with a control group. Twenty-three patients aged 19–60 years affected by breast soft tissue defects were analyzed at the Plastic and Reconstructive Department of the University of Rome Tor Vergata. Ten patients were treated with SVF-enhanced autologous fat grafts, and 13 patients were treated with fat grafting + platelet-rich plasma. The patients in the control group (n = 10) were treated with centrifuged fat grafting injection according to Coleman's procedure. The patients treated with SVF-enhanced autologous fat grafts showed a 63% maintenance of the contour restoring and of three-dimensional volume after 1 year compared with the patients of the control group treated with centrifuged fat graft, who showed a 39% maintenance. In those patients who were treated with fat grafting and PRP, we observed a 69% maintenance of contour restoring and of three-dimensional volume after 1 year. As reported, the use of either e-SVF or PRP mixed with fat grafting produced an improvement in maintenance of breast volume in patients affected by breast soft tissue defect.

Orlandi, Augusto; Scioli, Maria Giovanna; Di Pasquali, Camilla; Bocchini, Ilaria; Curcio, Cristiano Beniamino; Floris, Micol; Fiaschetti, Valeria; Floris, Roberto; Cervelli, Valerio

2012-01-01

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Evaluation of healing potential of autogenous, macroscopic fat deposited or fat free, omental graft in experimental radius bone defect in rabbit: Radiological study  

International Nuclear Information System (INIS)

This study was designed for evaluation of the difference between the ability of greater omentum graft with or without macroscopic fat deposition in acceleration of bone healing process. Adult female New Zealand white rabbits (n=15) were randomly divided into three equal groups. In groups A and B, the drilled hole on the left radius was filled by the omentum without and with macroscopic fat deposition, respectively while drilled hole on the right radius left intact for consideration as control. In group C, the drilled hole on the left and right radius was filled by the omentum sample with and without macroscopic fat deposition, respectively. Experimental bone defects on the radiuses were secured by the pieces of greater omentum, with or without macroscopic fat deposition, which obtained as an autogenous graft from each rabbit in accompany with control samples. Standardized serial radiography for evaluation of bone healing was performed and the difference in bone healing process in three groups of study was determined. According to the obtained data, the radius bones which filled by omentum without macroscopic fat deposition showed faster healing process than the radius bones which filled by omentum with macroscopic fat deposition (P<0.05). (author)

2011-01-01

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Evaluation of Healing Potential of Autogenous, Macroscopic Fat Deposited or Fat Free, Omental Graft in Experimental Radius Bone Defect in Rabbit: Radiological Study  

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Full Text Available This study was designed for evaluation of the difference between the ability of greater omentum graft with or without macroscopic fat deposition in acceleration of bone healing process. Adult female New Zealand white rabbits (n=15 were randomly divided into three equal groups. In groups A and B, the drilled hole on the left radius was filled by the omentum without and with macroscopic fat deposition, respectively while drilled hole on the right radius left intact for consideration as control. In group C, the drilled hole on the left and right radius was filled by the omentum sample with and without macroscopic fat deposition, respectively. Experimental bone defects on the radiuses were secured by the pieces of greater omentum, with or without macroscopic fat deposition, which obtained as an autogenous graft from each rabbit in accompany with control samples. Standardized serial radiography for evaluation of bone healing was performed and the difference in bone healing process in three groups of study was determined. According to the obtained data, the radius bones which filled by omentum without macroscopic fat deposition showed faster healing process than the radius bones which filled by omentum with macroscopic fat deposition (P<0.05.

Mohammad Nasrollahzadeh Masouleh, Iraj Sohrabi Haghdoost, Gholamreza Abedi Cham Heydari, Amirali Raissi* and Soroush Mohitmafi1

2011-01-01

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Fats  

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Full Text Available ... or less saturated fat per serving are considered low in saturated fat. Trans Fat Like saturated fat, trans fat increases blood cholesterol levels. It is actually worse for you than saturated ...

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Fats  

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Full Text Available ... Text Size: A A A Listen En Español Fats Unhealthy fats Healthy fats No doubt about it, ... your heart health with that single change! Unhealthy Fats Saturated Fat Why should you eat less saturated ...

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Miringoplastia com a utilização de um novo material biossintético / Myringoplasty using a new biomaterial allograft  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese A miringoplastia é uma cirurgia com a finalidade de controlar a infecção no ouvido médio, reconstruir o mecanismo de transmissão sonora para a janela oval e proteger a janela redonda. São descritos diversos materiais para reconstruir a membrana timpânica, destacando-se a fáscia do músculo temporal, [...] pericôndrio do tragus, cartilagem, dura-máter, tecido placentário, entre outros. OBJETIVO: Este trabalho tem objetivo de demonstrar o efeito de um novo biomaterial, a membrana de látex natural com polilisina, desenvolvida no laboratório de Neuroquímica do Departamento de Bioquímica da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo - USP. FORMA DE ESTUDO: Coorte Longitudinal. MATERIAL E MÉTODO: O biomaterial utilizado é estimulante da neovascularização e crescimento tecidual organizado em diferentes órgãos e tecidos, sendo um material inócuo e não rejeitado pelo organismo. Foi usada a biomembrana de látex com polilisina como um implante transitório para o fechamento da perfuração da membrana timpânica. A membrana foi colocada na face externa dos bordos da membrana timpânica e a fáscia temporal na face interna da mesma. Foram estudadas 238 orelhas com perfuração de membrana timpânica por seqüela de otite média crônica, submetidas a miringoplastia com enxerto de fáscia de músculo temporal e a membrana de látex natural, com idades de 7 a 76 anos. Apresentavam uma ou mais miringoplastias anteriores sem sucesso 41 dos casos. RESULTADO: Como ressaltamos preliminarmente, verificamos pega do enxerto em 90,5% das orelhas (181), sendo fechamento de perfuração amplas, 96; médias, 73 e 12 pequenas. Verificamos intensa vascularização em 100% dos enxertos, o que não é habitual quando não se usa a membrana de látex natural. CONCLUSÃO: Conclue-se que o biomaterial usado merece nossa atenção quanto ao seu uso como implante transitório em miringoplastias, melhorando o processo de revascularização da membrana timpânica remanescente. Abstract in english Myringosplaty is a surgery that is performed to control infections in middle ear, to reconstruct the sound conducting mechanism for the oval window and protection of the round window. Some materials are used to reconstruct the tympanic membrane like autologous temporalis fascia, cartilage-perichondi [...] um graft taken from the tragus, cartilage only, dura mater human placental graft. It is important the vascular support to the graft with well-vascularized flap in wide perforations. AIM: The main goal of this work is shown the use of a new biomaterial, the natural latex membrane with polylysin. STUDY DESIGN: Longitudinal Cohort. MATERIAL AND METHOD: This material was developed from Department of Biochemistry from Faculdade de Medicina de Ribeirão Preto Universidade de São Paulo. The natural latex membrane is used stimulating neovessels and organized tecidual growing in different parts and tissues of the human body. This material promotes any allergic reaction and is innocuous to the human tissue. The 238 ears with tympanic membrane perforation resulted from chronic middle ear infection and thek was going through myringoplasty with autologous temporalis fascia and natural latex membrane. The ages were 7 to 76 years. RESULTS: The first results show 181 (90,5%) healing tympanic membrane perforation, 96 healing of wide perforation 73 medium perforation and 12 small one. Neovessels could be seen in all grafts and remaining tympanic membrane. This is not a habitual funding when the natural latex membrane is not used. CONCLUSION: According to these results we can conclude that the natural latex membrane can be used as a temporary implant in myringoplasty, improving the well vascularized of remaining tympanic membrane.

José Antonio Apparecido de, Oliveira; Miguel Angelo, Hyppolito; Joaquim, Coutinho Netto; Fátima, Mrué.

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Jejunal perforation after abdominal liposuction, bilateral breast augmentation and facial fat grafting.  

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A 54-year-old woman presented to the emergency department 24 h after undergoing abdominal liposuction, bilateral breast augmentation and facial fat grafting at a private plastic surgery clinic. She presented with the classic evolution of a bowel perforation secondary to abdominal liposuction. A computed tomography (CT) scan found free air in her abdominal cavity. Based on the CT scan and the persistent pain experienced by the patient, an abdominal laparatomy was urgently performed. A jejunum perforation was found and was treated with a resection of the affected segment followed by intestinal anastomosis. The patient had a successful recovery and was discharged seven days later. The present article also reviews the classical presentation of a bowel perforation following abdominal liposuction. PMID:23997589

Coronado-Malagón, Martin; Tauffer-Carrion, Luis Tomas

2012-01-01

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Effect of an autogenous free fat graft on hemilaminectomy defects in dogs  

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The purpose of this study was to evaluate the effect of an autogenous free fat graft (FFG) on hemilaminectomy defects. Hemilaminectomy was performed at three levels in three beagles, and each defect was designated as a control site or a site treated with one of two different sizes of FFG. Subsequently, longitudinal computed tomography scanning and histopathological examination were performed. As a result, no postoperative dural adhesion was recognized at the sites where FFGs were placed regardless of the size of the FFG. Moreover, there was no compression of the spinal cord by the FFG. Therefore, it appears that postoperative dural adhesion was controlled by the FFG and that the possibility of FFG migration into the spinal canal is low in hemilaminectomy. In conclusion, placement of an FFG over the defect was considered useful for preventing complications in hemilaminectomy

2009-10-01

 
 
 
 
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Supervivencia a largo plazo de los injertos grasos Long-term survival with fat grafting  

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Full Text Available Presentamos varios casos de pérdida de volumen de diferentes etiologías y en distintas regiones corporales y faciales tratadas mediante injertos de tejido graso autólogo según la técnica de lipoestructura. En ningún caso se realizó sobrecorrección del defecto en ningún caso. La evolución con un seguimiento máximo de 7 años y mínimo de 1 año no mostró disminución del volumen obtenido en el acto quirúrgico en la gran mayoría de los casos. Debido a los resultados obtenidos creemos que el injerto de grasa autólogo es el método de elección para restaurar volúmenes con fines estéticos o reconstructivos.Volume loss in several facial and body areas was treated by means of autologous fatty tissue grafts with lipostructure technique. There were no cases of overcorrection. The patients’ course, with a maximum follow-up of 7 years and a minimum of 1 year did not evidence any loss of the surgically restored tissue volume in the majority of cases. The above results suggest that autologous fat grafts are the method of choice to restore volume for both cosmetic and reconstructive purposes.

J. Planas

2006-03-01

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Supervivencia a largo plazo de los injertos grasos / Long-term survival with fat grafting  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Presentamos varios casos de pérdida de volumen de diferentes etiologías y en distintas regiones corporales y faciales tratadas mediante injertos de tejido graso autólogo según la técnica de lipoestructura. En ningún caso se realizó sobrecorrección del defecto en ningún caso. La evolución con un segu [...] imiento máximo de 7 años y mínimo de 1 año no mostró disminución del volumen obtenido en el acto quirúrgico en la gran mayoría de los casos. Debido a los resultados obtenidos creemos que el injerto de grasa autólogo es el método de elección para restaurar volúmenes con fines estéticos o reconstructivos. Abstract in english Volume loss in several facial and body areas was treated by means of autologous fatty tissue grafts with lipostructure technique. There were no cases of overcorrection. The patients’ course, with a maximum follow-up of 7 years and a minimum of 1 year did not evidence any loss of the surgically resto [...] red tissue volume in the majority of cases. The above results suggest that autologous fat grafts are the method of choice to restore volume for both cosmetic and reconstructive purposes.

J., Planas; V., Cervelli; A., Pontón; G., Planas.

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Effects of Expanded Human Adipose Tissue-Derived Mesenchymal Stem Cells on the Viability of Cryopreserved Fat Grafts in the Nude Mouse  

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Adipose-derived mesenchymal stem cells (AdMSCs) augment the ability to contribute to microvascular remodeling in vivo and to modulate vascular stability in fresh fat grafts. Although cryopreserved adipose tissue is frequently used for soft tissue augmentation, the viability of the fat graft is poor. The effects of culture-expanded human adipose tissue-derived mesenchymal stem cells (hAdMSCs) on the survival and quality of the cryopreserved fat graft were determined. hAdMSCs from the same dono...

Ko, Myung-soon; Jung, Ji-youl; Shin, Il-seob; Choi, Eun-wha; Kim, Jae-hoon; Kang, Sung Keun; Ra, Jeong Chan

2011-01-01

44

Fats  

Medline Plus

Full Text Available ... per serving are considered low in saturated fat. Trans Fat Like saturated fat, trans fat increases blood cholesterol levels. It is actually ... healthy diet, you want to eat as little trans fat as possible by avoiding all foods that ...

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Use of autologous fat grafting for reconstruction postmastectomy and breast conserving surgery: a systematic review protocol  

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Introduction There is growing interest in the potential use of autologous fat grafting (AFG) for the purposes of breast reconstruction. However, concerns have been raised regarding the technique's clinical effectiveness, safety and interference with screening mammography. The objective of this systematic review was to determine the oncological, clinical, aesthetic and functional, patient reported, process and radiological outcomes for AFG. Methods and analysis All original studies, including randomised controlled trials, cohorts studies, case–control studies, case series and case reports involving women undergoing breast reconstruction. All AFG techniques performed for the purposes of reconstruction in the postmastectomy or breast conserving surgery setting will be considered. Outcomes are defined within this protocol along; oncological, clinical, aesthetic and functional, patient reported, process and radiological domains. The search strategy has been devised to find papers about ‘fat grafting and breast reconstruction’ and is outlined within the body of this protocol. The full search strategy is outlined within the body of the protocol. The following electronic databases will be searched from 1 January 1986 to 6 June 2013: PubMed, MEDLINE, EMBASE, SCOPUS, CINAHL, PsycINFO, SciELO, The Cochrane Library, including the Cochrane Database of Systematic Reviews (CDSR), Cochrane Central Register of Controlled Trials (CENTRAL), Database of Abstracts of Reviews of Effect (DARE), the Cochrane Methodology Register, Health Technology Assessment Database, the NHS Economic Evaluation Databases and Cochrane Groups, ClinicalTrials.gov, Current Controlled Trials Database, the World Health Organisation (WHO) International Clinical Trials Registry Platform, UpToDate.com, NHS Evidence and the York Centre for Reviews and Dissemination. Grey literature searches will also be conducted as detailed in our review protocol. Eligibility assessment occurred in two stages, title and abstract screening and then full text assessment. Data were extracted and stored in a database with standardised extraction fields to facilitate easy and consistent data entry. Ethics and dissemination This systematic review will be published in a peer-reviewed journal. It will also be presented at national and international conferences in the fields of plastic, reconstructive and aesthetic surgery and at more general surgical and methodological conferences. It will be disseminated electronically and in print. Brief reports of the review findings will be disseminated directly to the appropriate audiences of surgeons and societies through email and other modes of communication. Updates of the review will be conducted to inform and guide healthcare practice and policy. Protocol Registration PROSPERO—National Institute of Health Research (NIHR) Prospective Register of Systematic Reviews (CRD42013005254)

Agha, Riaz A; Goodacre, Tim; Orgill, Dennis P

2013-01-01

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Fats  

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Full Text Available ... with polyunsaturated fats. Sources of polyunsaturated fats are: Corn oil Cottonseed oil Safflower oil Soybean oil Sunflower ... Choices Diabetes Superfoods Fats Alcohol Non-starchy Vegetables Grains and Starchy Vegetables Protein Foods What Can I ...

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Fats  

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Full Text Available ... In Memory In Honor Become a Member En Español Type 1 Type 2 About Us Online Community ... Page Text Size: A A A Listen En Español Fats Unhealthy fats Healthy fats No doubt about ...

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COMPARATIVE STUDY OF MANAGEMENT WITH MYRINGOPLASTY AND CHEMICAL CAUTERISATION IN TUBO-TYMPANIC TYPE OF CHRONIC SUPPURATIVE OTITIS MEDIA  

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Full Text Available Introduction CSOM is highly prevalent chronic ear disease. In developing countries like India, where tertiary medical facility is not available to all people, treatment should be cost effective and easily feasible at even primary health centre. With this background a study was performed for closure of small to moderate central perforation with chemical cauterisation and to see whether it is equally effective as that of Myringoplasty or not.Study design: prospective clinical study.Methodology: To compare results of chemical cauterisation (TCA with myringoplasty on non healing small and medium sized central tympanic membrane perforation of pars tensa, 100 patients with dry tympanic membrane perforations. Result:1 Success rate with myringoplasty and chemical cauterisation were 76% and 72% respectively.2 The improvement of hearing at 3rd month of follow-up after successful procedure with myringoplasty and chemical cauterisation in term of air bone gap less than 10 db were 68.4% and 88.88% respectivelyConclusion:1 For closure of small central perforation chemical cauterisation is equally effective as myringoplasty.2 For closure of moderate central perforation, myringoplasty is superior to chemical cauterisation.3 Hearing improvement was observed better for chemical cauterisation as compared to Myringoplasty.

Kiran J Shinde

2013-12-01

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Injertos de tejido adiposo en cirugía estética mamaria / Fat grafts in aesthetic breast surgery  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish El injerto de tejido adiposo se ha convertido en una de las principales herramientas con la que contamos en Cirugía Plástica y, como no podía ser de otra forma, la mama es el principal órgano diana de nuestra actuación. Desde que introdujimos la técnica en nuestra práctica privada en el año 2009 hem [...] os ido incrementando las indicaciones de su uso. Las tres principales son el aumento mamario, la corrección de defectos y asimetrías y más recientemente el aumento con combinación de ambas técnicas. El aumento mamario con tejido adiposo está indicado en pacientes que quieran incrementar el volumen sin usar implantes. Hay que explicar muy bien a la paciente lo que podemos conseguir en cuanto a volumen y proyección de la mama, además de los problemas potenciales de aparición en las mamografías de quistes y microcalcificaciones. El tejido adiposo, en cambio, es un gran complemento de los implantes mamarios, ya que permite corregir deformidades y asimetrías que con los implantes son más difíciles de resolver. El aumento de mamas combinando ambas técnicas es la consecuencia final y evidente de esta evolución terapéutica, ya que aúna las ventajas de ambas: la firmeza y volumen estables que proporcionan los implantes y la plasticidad que aporta el tejido adiposo para lograr una mayor simetría. Abstract in english Fat grafting has become one of the main tools in Plastic Surgery and as it could only be, the breast is the main target organ of our performance. Since we introduced the technique in our private practice in 2009 we have been increasing its use. The top three indications are: breast augmentation, cor [...] rection of defects and asymmetries and more recently breast augmentation combining both techniques. Breast enhancement with fat is indicated for patients who want to increase the volume without using implants. It must be explained very well to the patient what we can achieve in terms of volume and projection of the breast, along with the potential problems of cysts and microcalcifications in mammograms. Adipose tissue is a great complement to the implants, and we can correct deformities and asymmetries that with implants are much more difficult to solve. Breast augmentation combining both techniques is the final result of the therapeutic evolution as we combine the advantages of both: the firmness and stable volume supported by the implants and the plasticity of the adipose tissue to achieve greater symmetry.

Benito-Ruiz, J..

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... LDL) cholesterol. Sources of monounsaturated fat include: Avocado Canola oil Nuts like almonds, cashews, pecans, and peanuts Olive ... more monounsaturated fats, try to substitute olive or canola oil instead of butter, margarine or shortening when cooking. ...

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Intraoperative fat embolism during core decompression and bone grafting for osteonecrosis of the hip: report of 3 cases and literature review.  

Science.gov (United States)

Osteonecrosis (ON) of the femoral head, without timely intervention, often progresses to debilitating hip arthritis. Core decompression (CD) with bone grafting was used to treat patients with early-stage ON. In 3 cases, intraoperative oxygen saturation, end-tidal carbon dioxide fluctuations, and/or vital sign fluctuations were observed during insertion of the graft, a mixture of bone marrow and demineralized bone matrix. In 1 case, continued postoperative pulmonary symptoms required admission to intensive care. In this article, we describe these cases and provide supporting evidence that they were caused by fat emboli secondary to forceful insertion of bone graft. We review the literature and present complications data. Although no cases of fat emboli were reported as complications of any CD series with or without bone grafting, CD augmented with bone graft may carry risks not seen before in CD alone. Care should be taken to avoid these complications, possibly through technique modification. PMID:24945478

Schaffer, Joseph Christopher; Adib, Farshad; Cui, Quanjun

2014-06-01

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Fat embolism in liposuction and intramuscular grafts in rabbits Embolia gordurosa na lipoaspiração e enxertia intramuscular em coelhos  

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Full Text Available PURPOSE: To evaluate the effects of fat embolism in organs such as lung and liver. METHODS: Twenty rabbits underwent autologous intramuscular fat grafting in the right thigh after liposuction. The groups were determined according to the postoperative day that occurred in euthanasia: 60, 90 and 120 day. Then, lung and liver were excised and sent to the histopathology laboratory for analysis in search of late injury secondary to a prior event of fat embolism in the tissues. RESULTS: The results showed a change in the macroscopic sample with discoloration of the liver tissue heterogeneously. There were no changes consistent with embolic effect under the microscope. CONCLUSION: The option of performing a technique of fat grafting with a less traumatic surgical procedure can be considered protective against embolic events, with no impact to late embolic events on the tissues.OBJETIVO: Avaliar a repercussão da embolia gordurosa em órgãos como pulmão e fígado. MÉTODOS: Vinte coelhos foram submetidos à enxertia autóloga intramuscular de gordura em coxa direita após lipoaspiração. Os grupos foram determinados conforme os dias pós-operatórios (DPO em que ocorreu a eutanásia: 60 DPO, 90DPO, 120 DPO. Em seguida, o pulmão e o fígado foram ressecados e encaminhados ao laboratório de histopatologia para análise em busca de lesão tardia secundária a evento de embolia gordurosa prévia nos tecidos. RESULTADOS: Foi evidenciada uma alteração na amostra a analise macroscópica com alteração da coloração do tecido hepático de forma heterogênea. Não houve alterações compatíveis com repercussão de processo embólico à microscopia. CONCLUSÃO: A opção pela realização de uma técnica de lipoenxertia menos traumática e com pequeno tempo cirúrgico pode ser considerada protetora para eventos embólicos, não havendo repercussão embólica a tardiamente.

Victor Araujo Felzemburgh

2012-05-01

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Fat embolism in liposuction and intramuscular grafts in rabbits / Embolia gordurosa na lipoaspiração e enxertia intramuscular em coelhos  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese OBJETIVO: Avaliar a repercussão da embolia gordurosa em órgãos como pulmão e fígado. MÉTODOS: Vinte coelhos foram submetidos à enxertia autóloga intramuscular de gordura em coxa direita após lipoaspiração. Os grupos foram determinados conforme os dias pós-operatórios (DPO) em que ocorreu a eutanásia [...] : 60 DPO, 90DPO, 120 DPO. Em seguida, o pulmão e o fígado foram ressecados e encaminhados ao laboratório de histopatologia para análise em busca de lesão tardia secundária a evento de embolia gordurosa prévia nos tecidos. RESULTADOS: Foi evidenciada uma alteração na amostra a analise macroscópica com alteração da coloração do tecido hepático de forma heterogênea. Não houve alterações compatíveis com repercussão de processo embólico à microscopia. CONCLUSÃO: A opção pela realização de uma técnica de lipoenxertia menos traumática e com pequeno tempo cirúrgico pode ser considerada protetora para eventos embólicos, não havendo repercussão embólica a tardiamente. Abstract in english PURPOSE: To evaluate the effects of fat embolism in organs such as lung and liver. METHODS: Twenty rabbits underwent autologous intramuscular fat grafting in the right thigh after liposuction. The groups were determined according to the postoperative day that occurred in euthanasia: 60, 90 and 120 d [...] ay. Then, lung and liver were excised and sent to the histopathology laboratory for analysis in search of late injury secondary to a prior event of fat embolism in the tissues. RESULTS: The results showed a change in the macroscopic sample with discoloration of the liver tissue heterogeneously. There were no changes consistent with embolic effect under the microscope. CONCLUSION: The option of performing a technique of fat grafting with a less traumatic surgical procedure can be considered protective against embolic events, with no impact to late embolic events on the tissues.

Victor Araujo, Felzemburgh; Rafaela Cavalcante das Neves, Barbosa; Victor Luiz Correia, Nunes; José Humberto Oliveira, Campos.

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Análise da lipoenxertia estruturada na redefinição do contorno facial / Analysis of structured fat grafting for redefining facial contours  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese INTRODUÇÃO: A enxertia de gordura como preenchimento no rejuvenescimento e melhoria do contorno facial vem sendo usada por alguns autores e demonstra um potencial excelente como método de escolha para essa finalidade, uma vez que tem como premissa o princípio básico de corrigir as deformidades com o [...] tecido mais semelhante possível. O objetivo deste trabalho foi avaliar clinicamente a eficiência da enxertia de gordura estruturada na redefinição do contorno facial. MÉTODO: Foi realizada análise retrospectiva de 39 pacientes submetidos a lipoenxertia estruturada para a redefinição do contorno facial, entre 2002 e 2012. A seleção de pacientes incluiu correção de deformidades, assimetrias, harmonização do contorno e aumento da projeção óssea, mas excluiu o rejuvenescimento per se. A avaliação do resultado clínico foi realizada pelo paciente e pelo cirurgião, com auxílio de documentação fotográfica pré e pós-operatória. O resultado clínico foi classificado pelo paciente e cirurgião, empregando escala que variava de 1 a 3: (1) o objetivo não foi alcançado de forma alguma; (2) o objetivo foi alcançado parcialmente; ou (3) o objetivo foi alcançado totalmente. Foi realizado, também, levantamento de prontuários para obtenção dos seguintes dados: idade, alteração ponderal, volume enxertado por área, número de sessões de enxertia realizadas, história de tabagismo e complicações. RESULTADOS: As médias das avaliações do cirurgião e paciente foram, respectivamente, 2,6 ± 0,6 e 2,7 ± 0,5, havendo correlação estatisticamente significante (P Abstract in english INTRODUCTION: Fat grafting as a filling method for the rejuvenation and enhancement of facial contours was demonstrated by some authors to be an excellent alternative method for redefining facial contours, based on the premise that the donor tissue used in the correction of the deformities has simil [...] ar characteristics as the recipient tissue. The objective of the present study was to clinically evaluate the efficiency of structured fat grafting when redefining facial contours. METHODS: A retrospective evaluation was performed in 39 patients who underwent structured fat grafting to redefine their facial contours between 2002 and 2012. The patients selected included those who underwent corrections of deformities, asymmetrical features, contour smoothing, and increased bone projection. Patients who underwent facial contour rejuvenation were excluded. The clinical outcome assessment was performed by the patient and surgeon, with the aid of preoperative and postoperative photographic documentation. The clinical outcome was rated by the patient and surgeon, using a scale ranging from 1 to 3, defined as follows: 1, the objective has not been achieved in any way; 2, the objective was partially achieved; or 3, the objective was fully achieved. In addition, a survey was conducted using the patients' medical charts to obtain the following data: age, weight change, volume grafted by area, number of grafting sessions performed, history of smoking, and complications. RESULTS: The mean surgeon and patient assessment scores were 2.6 ± 0.6 and 2.7 ± 0.5, respectively, with a statistically significant correlation (P

Amarante, Marco Túlio Junqueira.

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Lipoestructura y relleno del polo superior de la mama frente a implantes Structural fat graft and lipofilling of mammary upper pole versus mammary implants  

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Full Text Available La lipoestructura mamaria ofrece nuevas alternativas de tratamiento en la cirugía estética de aumento mamario, cumpliendo en algunos casos las expectativas esperadas y en otros no. Analizamos este hecho en 4 tipos de aplicación de lipoestructura mamaria que hemos venido realizando en los últimos años, centrándonos en un aspecto importante de esta cirugía que es el relleno del polo superior de la mama. Los tipos de aplicación empleados son: aumento mamario simple mediante lipoestructura en comparación con implantes; pexia más lipoestructura frente a pexia más implantes mamarios; reconstrucción de mama tuberosa mediante lipoestructura o implantes y finalmente, relleno periprotésico mediante lipoestructura en mamas sometidas a cirugía de aumento mamario con implantes. En definitiva, podríamos resumir este trabajo en una frase diciendo que la lipoestructura mamaria, a nuestro juicio, no sirve si lo que prima es conseguir el relleno del polo superior de la mama, siendo en este caso de elección la colocación de implantes mamarios. No obstante, en alguno de los casos señalados no solo es una alternativa, sino que obtiene resultados superiores a los logrados sólamente con implantes.The mammary structural fat graft offers news treatment options in breast augmentation cosmetic surgery, but it sometimes meets expectations and sometimes doesn´t. We analyze 4 different types of lipostructure mammary applications that we have been using in the last years, focused in an important aspect of this surgery as it´s the filling of the upper mammary pole. These applications are: mammary augmentation by simple structural fat compared with the use of mammary implants; structural fat graft and mastopexy versus implants and mastopexy; tuberous breast reconstruction using structural fat graft or implants and finally, periprosthetic filling in breast augmentation with mammary implants using structural fat graft. In short, we could summarize this paper telling that in our opinion, structural fat graft doesn´t work if our intention is to fill the upper mammary pole. However, structural fat graft is not only an alternative; in some cases it exceeds the expected results using mammary implants.

J.M. Cervilla Lozano

2012-09-01

 
 
 
 
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Lipoestructura y relleno del polo superior de la mama frente a implantes / Structural fat graft and lipofilling of mammary upper pole versus mammary implants  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish La lipoestructura mamaria ofrece nuevas alternativas de tratamiento en la cirugía estética de aumento mamario, cumpliendo en algunos casos las expectativas esperadas y en otros no. Analizamos este hecho en 4 tipos de aplicación de lipoestructura mamaria que hemos venido realizando en los últimos año [...] s, centrándonos en un aspecto importante de esta cirugía que es el relleno del polo superior de la mama. Los tipos de aplicación empleados son: aumento mamario simple mediante lipoestructura en comparación con implantes; pexia más lipoestructura frente a pexia más implantes mamarios; reconstrucción de mama tuberosa mediante lipoestructura o implantes y finalmente, relleno periprotésico mediante lipoestructura en mamas sometidas a cirugía de aumento mamario con implantes. En definitiva, podríamos resumir este trabajo en una frase diciendo que la lipoestructura mamaria, a nuestro juicio, no sirve si lo que prima es conseguir el relleno del polo superior de la mama, siendo en este caso de elección la colocación de implantes mamarios. No obstante, en alguno de los casos señalados no solo es una alternativa, sino que obtiene resultados superiores a los logrados sólamente con implantes. Abstract in english The mammary structural fat graft offers news treatment options in breast augmentation cosmetic surgery, but it sometimes meets expectations and sometimes doesn´t. We analyze 4 different types of lipostructure mammary applications that we have been using in the last years, focused in an important asp [...] ect of this surgery as it´s the filling of the upper mammary pole. These applications are: mammary augmentation by simple structural fat compared with the use of mammary implants; structural fat graft and mastopexy versus implants and mastopexy; tuberous breast reconstruction using structural fat graft or implants and finally, periprosthetic filling in breast augmentation with mammary implants using structural fat graft. In short, we could summarize this paper telling that in our opinion, structural fat graft doesn´t work if our intention is to fill the upper mammary pole. However, structural fat graft is not only an alternative; in some cases it exceeds the expected results using mammary implants.

Cervilla Lozano, J.M..

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Preoperative color duplex echographical venous mapping before autologous fat graft for calf augmentation: a case report of superficial vein thrombosis and prevalence of intersaphenic anastomosis.  

Science.gov (United States)

Autologous fat grafting for calf augmentation is considered an easy and safe technique. Only few cases of potential complications have been described in literature; among them, vein thrombosis was never reported. We report a case of superficial vein thrombosis of the intersaphenic anastomosis after fat graft for calf symmetrization in club-foot syndrome. A color duplex echographical study showed that such intersaphenic anastomoses are present in all patients, but they have an ectatic diameter in 70% of patients with great saphenous vein insufficiency and in 50% of patients without insufficiency. The plastic surgeon should be aware of the presence and topography of such anatomical variations before performing the procedure. Moreover, a preoperative color duplex echographical venous mapping may help the surgeon in avoiding the trauma on vein variants and subsequent complications. PMID:23528632

Fraccalvieri, Marco; Contessa, Luigi; Salomone, Marco; Zingarelli, Enrico Maria; Bruschi, Stefano

2014-08-01

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Síndrome da angústia respiratória do adulto por embolia gordurosa no período pós-operatório de lipoaspiração e lipoenxertia / Adult respiratory distress syndrome due to fat embolism in the postoperative period following liposuction and fat grafting  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese A embolia gordurosa é definida como a ocorrência de bloqueio mecânico da luz vascular por gotículas circulantes de gordura. Acomete principalmente o pulmão, podendo afetar também o sistema nervoso central, a retina e a pele. A síndrome da embolia gordurosa é uma disfunção desses órgãos causada pelos [...] êmbolos gordurosos. As causas mais comuns de embolia gordurosa e síndrome da embolia gordurosa são as fraturas de ossos longos, mas há relatos de sua ocorrência após procedimentos estéticos. O diagnóstico é clínico, e o tratamento ainda se restringe a medidas de suporte. Apresentamos o caso de uma paciente que evoluiu com síndrome da angústia respiratória do adulto por embolia gordurosa no período pós-operatório de lipoaspiração e lipoenxertia e respondeu bem às manobras de recrutamento alveolar e à ventilação mecânica protetora.Apresentamos também uma análise epidemiológica e fisiopatológica da síndrome da embolia gordurosa após procedimentos estéticos. Abstract in english Fat embolism is defined as mechanical blockage of the vascular lumen by circulating fat globules. Although it primarily affects the lungs, it can also affect the central nervous system, retina, and skin. Fat embolism syndrome is a dysfunction of these organs caused by fat emboli. The most common cau [...] ses of fat embolism and fat embolism syndrome are long bone fractures, although there are reports of its occurrence after cosmetic procedures. The diagnosis is made clinically, and treatment is still restricted to support measures. We report the case of a female patient who developed adult respiratory distress syndrome due to fat embolism in the postoperative period following liposuction and fat grafting. In this case, the patient responded well to alveolar recruitment maneuvers and protective mechanical ventilation. In addition, we present an epidemiological and pathophysiological analysis of fat embolism syndrome after cosmetic procedures.

André Nathan, Costa; Daniel Melo, Mendes; Carlos, Toufen; Gino, Arrunátegui; Pedro, Caruso; Carlos Roberto Ribeiro de, Carvalho.

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Síndrome da angústia respiratória do adulto por embolia gordurosa no período pós-operatório de lipoaspiração e lipoenxertia Adult respiratory distress syndrome due to fat embolism in the postoperative period following liposuction and fat grafting  

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Full Text Available A embolia gordurosa é definida como a ocorrência de bloqueio mecânico da luz vascular por gotículas circulantes de gordura. Acomete principalmente o pulmão, podendo afetar também o sistema nervoso central, a retina e a pele. A síndrome da embolia gordurosa é uma disfunção desses órgãos causada pelos êmbolos gordurosos. As causas mais comuns de embolia gordurosa e síndrome da embolia gordurosa são as fraturas de ossos longos, mas há relatos de sua ocorrência após procedimentos estéticos. O diagnóstico é clínico, e o tratamento ainda se restringe a medidas de suporte. Apresentamos o caso de uma paciente que evoluiu com síndrome da angústia respiratória do adulto por embolia gordurosa no período pós-operatório de lipoaspiração e lipoenxertia e respondeu bem às manobras de recrutamento alveolar e à ventilação mecânica protetora.Apresentamos também uma análise epidemiológica e fisiopatológica da síndrome da embolia gordurosa após procedimentos estéticos.Fat embolism is defined as mechanical blockage of the vascular lumen by circulating fat globules. Although it primarily affects the lungs, it can also affect the central nervous system, retina, and skin. Fat embolism syndrome is a dysfunction of these organs caused by fat emboli. The most common causes of fat embolism and fat embolism syndrome are long bone fractures, although there are reports of its occurrence after cosmetic procedures. The diagnosis is made clinically, and treatment is still restricted to support measures. We report the case of a female patient who developed adult respiratory distress syndrome due to fat embolism in the postoperative period following liposuction and fat grafting. In this case, the patient responded well to alveolar recruitment maneuvers and protective mechanical ventilation. In addition, we present an epidemiological and pathophysiological analysis of fat embolism syndrome after cosmetic procedures.

André Nathan Costa

2008-08-01

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Dermis reconstruction and dermis fat graft through an intraoral incision: a new method to correct the furrowed philtral column deformity in lesser-form cleft lip.  

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Objective: Minor cleft lip deformities are also called lesser-form cleft lips. A furrowed philtral column is one of the important characters of these deformities. Many surgical methods have been adopted to correct it with less than satisfactory results. In this article, a dermis reconstructive method was introduced. Patients: From 2003 to 2010, 35 patients with lesser-form cleft lip were treated in our center. Interventions: Through an intraoral and vermilion incision, the oral side of the orbicularis oris muscle on the affected side was dissected. Through a vermilion and perialar incision, the dermal side of the orbicularis oris muscle was dissected along the furrow. After restoring orbicularis oris muscular ring continuity, if necessary, the underdeveloped dermis was reconstructed with three sutures along the furrow. To reinforce lip thickness on the affected side and increase the philtral column prominence, retroauricular dermis fat was grafted between the muscle and skin. Results: Thirty-five patients with lesser-form cleft lip were treated with dermis reconstruction and retroauricular dermis fat grafts. Congenital lip depressions were well corrected, and the philtral column prominences were reconstructed. The follow-up period was 6 to 20 months. All patients were satisfied with their results. Conclusion: Dermis reconstruction and dermis fat grafting through an intraoral incision is effective in repairing a furrowed philtral column deformity in lesser-form cleft lip. PMID:23320841

Wang, Youbin; Qi, Zheng; Wang, Xiaojun

2014-03-01

86

Experiencia en miringoplastía transcanal con pericondrio tragai inlay Experience in transcanal myringoplasty with inlay tragal perichondrium  

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Full Text Available Introducción: La timpanoplastía está orientada a la reconstrucción anatomofuncional del oído medio que realizada en la membrana timpánica se denomina miringoplastía. Objetivo: Evaluar los resultados anatomofuncionales de la miringoplastía transcanal con pericondrio tragal inlay en pacientes intervenidos en el Servicio de Otorrinolaringología del Hospital San Camilo entre 2004 y 2009. Material y método: Estudio retrospectivo descriptivo de fichas de 56 pacientes entre 7 y 77 años. Universo: 60 oídos, muestra: 48 oídos con edad promedio de 34 años. Se evaluaron resultados anatómicos según sexo, edad, ubicación, causa de perforación y mejoría funcional objetivada por audiometría. Resultados: La integridad anatómica posquirúrgica es de 81,3% sin diferencias según género. Según edad existe diferencia significativa de 93,3% para el tramo 7-19 años respecto del total. Las perforaciones centrales tuvieron un éxito de 100%. La causa más frecuente de perforación fue por otitis media crónica simple (75% con una integridad posquirúrgica del 80,5%. El 97,6% logró mejorar o mantener el nivel de audición, estableciéndose diferencialmente mejoría funcional en 52,4%, y una mantención en 45,2%. Conclusión: Los mejores resultados para esta técnica se obtienen en menores de 20 años con perforaciones centrales, siendo una técnica ideal que conserva la estructura de la membrana timpánica para futuras intervenciones.Introduction: Tympanoplasty is orientated to the anatomofunctional reconstruction of the middle ear, which is named myringoplasty, when performed in the tympanic membrane. Aim: To evaluate the anatomofunctional results of transcanal myringoplasty with inlay tragal perichondrium in patients controlled in the Otorhinolaryngology Unit of San Camilo Hospital, between 2004 and 2009. Material and method: Retrospective descriptive study on files of 56 patients between 7 and 77 years of age. Universe: 60 ears, sample: 48 ears with average age 34 years. Anatomical results were evaluated according to sex, age, location, cause of perforation and functional improvement measured by audiometry. Results: The overall anatomical postsurgical integrity is 81,3 % without differences between sexes. According to age there is a significant difference for the section between 7-19 years of age respect of the total (93,3 %. Central perforations had a 100% success rate. The most frequent reason of perforation was simple chronic otitis media (75% with a postsurgical integrity of 80,5 %. 97,6 % managed to improve or maintain hearing level, (52,4 % gained functional improvement, and 45,2 % maintained hearing level. Conclusion: Using this technique, best results are obtained in patients younger than 20 years of age, with central perforations. It is an ideal method that preserves the structure of the tympanic membrane for future interventions.

Mauricio Calderón R

2012-08-01

87

Experiencia en miringoplastía transcanal con pericondrio tragai inlay / Experience in transcanal myringoplasty with inlay tragal perichondrium  

Scientific Electronic Library Online (English)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish Introducción: La timpanoplastía está orientada a la reconstrucción anatomofuncional del oído medio que realizada en la membrana timpánica se denomina miringoplastía. Objetivo: Evaluar los resultados anatomofuncionales de la miringoplastía transcanal con pericondrio tragal inlay en pacientes interven [...] idos en el Servicio de Otorrinolaringología del Hospital San Camilo entre 2004 y 2009. Material y método: Estudio retrospectivo descriptivo de fichas de 56 pacientes entre 7 y 77 años. Universo: 60 oídos, muestra: 48 oídos con edad promedio de 34 años. Se evaluaron resultados anatómicos según sexo, edad, ubicación, causa de perforación y mejoría funcional objetivada por audiometría. Resultados: La integridad anatómica posquirúrgica es de 81,3% sin diferencias según género. Según edad existe diferencia significativa de 93,3% para el tramo 7-19 años respecto del total. Las perforaciones centrales tuvieron un éxito de 100%. La causa más frecuente de perforación fue por otitis media crónica simple (75%) con una integridad posquirúrgica del 80,5%. El 97,6% logró mejorar o mantener el nivel de audición, estableciéndose diferencialmente mejoría funcional en 52,4%, y una mantención en 45,2%. Conclusión: Los mejores resultados para esta técnica se obtienen en menores de 20 años con perforaciones centrales, siendo una técnica ideal que conserva la estructura de la membrana timpánica para futuras intervenciones. Abstract in english Introduction: Tympanoplasty is orientated to the anatomofunctional reconstruction of the middle ear, which is named myringoplasty, when performed in the tympanic membrane. Aim: To evaluate the anatomofunctional results of transcanal myringoplasty with inlay tragal perichondrium in patients controlle [...] d in the Otorhinolaryngology Unit of San Camilo Hospital, between 2004 and 2009. Material and method: Retrospective descriptive study on files of 56 patients between 7 and 77 years of age. Universe: 60 ears, sample: 48 ears with average age 34 years. Anatomical results were evaluated according to sex, age, location, cause of perforation and functional improvement measured by audiometry. Results: The overall anatomical postsurgical integrity is 81,3 % without differences between sexes. According to age there is a significant difference for the section between 7-19 years of age respect of the total (93,3 %). Central perforations had a 100% success rate. The most frequent reason of perforation was simple chronic otitis media (75%) with a postsurgical integrity of 80,5 %. 97,6 % managed to improve or maintain hearing level, (52,4 % gained functional improvement, and 45,2 % maintained hearing level). Conclusion: Using this technique, best results are obtained in patients younger than 20 years of age, with central perforations. It is an ideal method that preserves the structure of the tympanic membrane for future interventions.

Mauricio, Calderón R; Carmen, Meléndez P; Cristian, Morales S; Danisa, Torres M.

88

Oroantral communication closure using a pedicled buccal fat pad graft / Fechamento de comunicação buco-sinusal utilizando enxerto pediculado de corpo adiposo da bochecha  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese OBJETIVO: O objetivo desde artigo foi relatar um caso clínico de fechamento de fístula buco-sinusal tardia utilizando rotação de enxerto de tecido adiposo pediculado do corpo adiposo da bochecha. DESCRIÇÃO DO CASO: Paciente do sexo masculino, 66 anos, leucoderma, em boas condições de saúde geral, fo [...] i encaminhado para fechamento de extensa comunicação buco-sinusal. Ao exame clínico, observou-se uma fístula de aproximadamente 10 mm de diâmetro comunicando a cavidade oral com o seio maxilar. A cirurgia foi realizada em nível ambulatorial, sob anestesia local, para fechar a fístula buco-sinusal com um enxerto de tecido adiposo pediculado do corpo adiposo da bochecha. A reparação da ferida e o fechamento do defeito foram observados no pós-operatório de 30 dias, com completa epitelização. CONCLUSÃO: O enxerto pediculado de tecido do corpo adiposo da bochecha mostrou-se uma alternativa simples, eficaz e segura no fechamento mediato da fístula buco-sinusal apresentada neste caso clínico. Abstract in english PURPOSE: This paper reports the procedure used to close a late oroantral fistula using rotating flaps of the pedicled buccal fat pad. CASE DESCRIPTION: A 66-year-old, male patient with leukoderma, in good general health, was referred for closure of an extensive late oroantral communication. Upon cli [...] nical examination, an approximately 10-mm fistula was observed connecting the oral cavity to the maxillary sinus. An outpatient surgical procedure was performed with the use of local anesthetics to close the oroantral fistula with a rotating pedicled buccal fat pad flap. The healing of the wound and closure of the defect could be seen after a 30-day postoperative period, with complete epithelialization. CONCLUSION: Grafting of the pedicled buccal fat pad is thought to be an efficient, safe and easy alternative to a larger oroantral fistula closure. Pedicled buccal fat pad grafting corrected the defect without generating any sequelae and/or great postoperative discomfort to the patient.

Ruy de Oliveira, Veras Filho; Fernando, Giovanella; Rafael Machado, Karsburg; Marcos Antonio, Torriani.

89

Uso da gordura e fáscia muscular autólogas no tratamento da insuficiência glótica / Glottic insufficiency: the use of fat and fascia grafts  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Uma das alterações mais complexas que acometem as pregas vocais é a incompetência ou insuficiência glótica. Pode ser causada por alterações de mobilidade, fibroses, atrofias ou arqueamento das pregas vocais, e pode levar, entre outras situações como aspiração e tosse pouco efetiva, a graus variados [...] de disfonia. A partir do início do século 20, surgiram vários procedimentos cirúrgicos para a reabilitação da competência aerodinâmica e valvular da glote, por meio da injeção de substâncias heterólogas no espaço paraglótico. Os enxertos autólogos, como a gordura e a fáscia muscular, inseridos ou injetados nas pregas vocais inicialmente mostraram resultados promissores além de segurança e riscos mínimos de reações indesejadas. Neste artigo de revisão, os autores discutem o uso da gordura e da fáscia muscular na incompetência glótica, abordando aspectos históricos, o processo inflamatório gerado após a enxertia, as técnicas cirúrgicas mais utilizadas e o rendimento dos enxertos. Abstract in english Glottic insufficiency has been managed since the beginning of the twentieth century. The autologous grafts, as fat and muscular fascia, have shown safety and good results. The authors discuss the advantages and disadvantages of using fat and fascia in the management of glottic insufficiency, regardi [...] ng historical aspects, inflammatory process and surgical techniques.

Christiano de Giacomo, Carneiro; Domingos Hiroshi, Tsuji; Luiz Ubirajara, Sennes; João Aragão, Ximenes Filho; Rui, Imamura.

90

De la biología al injerto de tejido adiposo: cómo mejorar el lipoinjerto / From biology to fat grafting: how to improve lipofilling  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish A pesar de que el uso del injerto de grasa ha ganado popularidad, no hay consenso sobre la mejor manera de manejar el tejido adiposo. Los protocolos difieren y los resultados son a menudo variables. Diversos factores influyen en la calidad de la grasa inyectada, entre los que encontramos las molécul [...] as tóxicas provenientes de la infiltración, procedimiento previo a la liposucción. En este trabajo, hemos confirmado el efecto nocivo de los anestésicos sobre las células madre derivadas del tejido adiposo, determinando el efecto del lavado y la centrifugación en el tejido graso con el fin de proponer un protocolo simple y optimizado para mejorar la supervivencia del injerto. Evaluamos la citotoxicidad de la lidocaína sobre las células madre derivadas de tejido adiposo (ADSC) mediante ensayo de LDH. Sometimos el tejido adiposo conjunto a varios tipos de centrifugación (de 1 segundo a 10 minutos y desde 0 g a 1800 g), y el volumen de líquido y el aceite liberado se midió inmediatamente después de la centrifugación. Tras la determinación de las condiciones óptimas para la manipulación de tejidos (400 g/1 minuto), inyectamos el tejido adiposo de liposucción sin o con lidocaína en ratones inmunodeficientes. Un mes después de la inyección, evaluamos la calidad de los injertos mediante histología, y en comparación con los injertos obtenidos a partir de un protocolo convencional: una simple sedimentación. La lidocaína ejerce un efecto citotóxico sobre las ADSC, y este efecto depende del tiempo de incubación y de las concentraciones. En cuanto al tejido adiposo, una centrifugación intensa (900 g, 1800 g) es perjudicial en comparación con una centrifugación suave (100 g, 400 g). Además, las secciones histológicas de los injertos de tejido adiposo no centrifugados mostraron la presencia de grandes vacuolas de aceite mientras que los injertos resultantes de lavado con protocolo de centrifugación suave (400g/1minuto) no lo hacen. En conclusión, creemos que se debe emplear un manejo adecuado del tejido adiposo, incluyendo lavado y centrifugación, con el fin de eliminar el líquido de infiltración y las moléculas tóxicas asociadas que son perjudiciales para los injertos. Sin embargo, no recomendamos una centrifugación intensa ya que conduce muy rápidamente a una mayor muerte celular. Por lo tanto, una centrifugación suave (400 g/1 minuto) precedida de lavados, parece ser el protocolo más apropiado para la reinyección del tejido adiposo. Abstract in english While fat grafting for soft tissue filling has gained popularity, there is no consensus on the best way how to handle adipose tissue. Protocols differ and results are often highly variable. Various factors influence the quality of injected fat, among which the toxic molecules coming from infiltratio [...] n procedure prior to liposuction. In this work, we have confirmed the deleterious effect of anesthetics on adipose-derived stem cells, and determined the effect of washing and centrifugation on adipose tissue, in order to propose a simple and optimized protocol to improve graft survival. Lidocaine cytotoxicity on adipose-derived stem cells (ADSCs) was evaluated by LDH assay. Then, whole adipose tissue was subjected to various centrifugation types (from 1 sec to 10 min and from 0 g to 1800 g), and volume of liquid and oil released were measured immediately after centrifugation. After determination of the optimal conditions for tissue handling (400 g/1 min), adipose tissue from liposuction made without or with lidocaine was injected into immunodeficient mice. One month after injection, quality of the grafts was evaluated by histology, and compared with grafts obtained from one conventional protocol: a simple settling. Lidocaine exerts a cytotoxic effect on ADSCs, and this effect is dependent on the incubation time and concentrations. Concerning adipose tissue, strong centrifugation (900 g, 1800 g) is deleterious compared to the low centrifugation (100 g, 400 g). In add

Girard, A.C.; Mirbeau, S.; Atlan, M.; Festy, F.; Roche, R.; Hoareau, L..

91

Use of dermal-fat grafts in the post-oncological reconstructive surgery of atrophies in the zygomatic region: clinical evaluations in the patients undergone to previous radiation therapy  

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Full Text Available Abstract Introduction Grafting of autologous adipose tissue can be recommended in some cases of facial plastic surgery. Rhabdomyosarcoma is a type of cancer that can also affect the orbit. Enucleation of the eye can cause atrophy of the corresponding hemiface and decreased orbital growth. Case report We report a case of a female patient with a medical history of surgical enucleation of the right eyeball, who had received rhabdomyosarcoma radiation therapy in her youth. The patient presented with a depression in the right zygomatic region. We took a dermal-fat flap from the abdominal region, which had been previously treated. Results The surgical outcome, 48 hours, and much clearly 31 days after the surgery, revealed that the right zygomatic region had returned to its proper anatomical shape, although there were still signs of postoperative edema. Discussion Very damaged tissues, like those exposed to radiation therapy, are generally not suitable for grafting of adipose tissue. Conclusions In the described case, we achieved a technically and aesthetically satisfying result despite the patient's medical history involving several perplexities about the use of autologous dermal-fat tissues, because of prior radiation therapy exposure. The clinical case shows that even a region exposed to radiation therapy can be a valid receiving bed for dermal-fat grafting.

Inchingolo Francesco

2012-12-01

92

Lipoenxertia autóloga periorbitária no rejuvenescimento facial: análise retrospectiva da eficácia e da segurança em 31 casos / Autologous periorbital fat grafting in facial rejuvenation: a retrospective analysis of efficacy and safety in 31 cases  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese INTRODUÇÃO: Os sulcos periorbitários e zigomático e o malar flácido estão entre as características mais marcantes de envelhecimento ou de desarmonia facial. A reposição do volume é um método simples e eficiente, e o lipoenxerto pode ser o melhor material. O presente trabalho traz uma análise de 31 p [...] acientes submetidos a autolipoenxertia, com ênfase na eficácia e na segurança da técnica. MÉTODO: Análise retrospectiva de 31 pacientes consecutivos, submetidos a lipoenxertias periorbitária e malar, concomitantemente ou não a outros procedimentos estéticos. A avaliação foi feita por meio de comparação entre fotografias pré e pós-operatória, bem como pelo grau de satisfação dos pacientes. RESULTADOS: Dos 31 pacientes, 26 (83,9%) classificaram o resultado pós-operatório como ótimo, 3 (9,7%), bom, e 2 (6,4%), regular. Na avaliação dos autores, 24 (77,5%) pacientes apresentaram resultado ótimo, 5 (16,1%), bom, e 2 (6,4%), regular. Houve necessidade de retoque de lipoenxertia em apenas 4 pacientes, por sugestão do cirurgião. As complicações foram mínimas e passageiras. CONCLUSÕES: A lipoenxertia facial é fácil e eficaz, e as complicações são mínimas quando realizada por cirurgiões qualificados. Abstract in english BACKGROUND: Periorbital and zygomatic hollows as well as flaccid cheeks are among the most evident characteristics of aging or facial disharmony. Volume replacement is a simple and efficient procedure, and fat grafting is considered as the best treatment for these characteristics. This study evaluat [...] es 31 patients who underwent autologous fat grafting and emphasizes the safety and efficacy of this procedure. METHODS: A retrospective analysis of 31 consecutive patients who underwent periorbital and zygomatic fat grafting, alone or in combination with other cosmetic procedures, was carried out. Final evaluation was performed by assessing pre- and postoperative photographs as well as the degree of patient satisfaction. RESULTS: Of 31 patients, 26 (83.9%) reported excellent postoperative outcomes; 3 (9.7%), satisfactory outcomes; and 2 (6.4%), poor outcomes. According to the authors' evaluation, 24 (77.5%) patients had excellent outcomes, 5 (16.1%) had satisfactory outcomes, and 2 (6.4%) had poor outcomes. Retouching of the fat graft was recommended for only 4 patients. The complications observed were minimal and transient. CONCLUSIONS: Facial fat grafting is a simple and effective procedure that presents minimal complications when performed by skilled surgeons.

Chang Yung, Chia; Diego Antonio, Rovaris.

93

Uso de factores de crecimiento plaquetar unidos a injertos de grasa para lipofiling facial en ritidectomía Use of fat grafts enriched with platelet growth factors for facial lipofiling in ritidectomy  

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Full Text Available Presentamos una serie de pacientes a los que hemos realizado infiltraciones de grasa enriquecida con Factores de Crecimiento Plaquetario (F.C.P. como único procedimiento. Igualmente presentamos casos donde las infiltraciones van acompañadas con otros procedimientos (lifting temporal, lifting cérvico-frontal, etc.. También usamos el plasma rico en F.C.P. en forma de coágulo para rellenar el surco de la cuenca orbitaria (“Tear Through”, y como mesoterapia facial enriquecida con nutrientes. El objetivo de este trabajo es presentar una revisión detallada de los pasos a seguir para la realización de éste procedimiento, que van desde la simple extracción de sangre para la posterior obtención de F.C.P. hasta la técnica de infiltración de grasa enriquecida con dichos factores a nivel facial. Con esta técnica de enriquecimiento de la grasa hemos logrado tener mejores resultados y con mayor permanencia. Evaluando los postoperatorios de pacientes sometidos a este procedimiento, hemos observado que el volumen infiltrado en áreas como la región malar, se mantiene entre un 90% a 95%. En otras áreas como labios y surcos nasogenianos (áreas de gran movilidad, solo permanece entre el 50% a 60% del volumen infiltrado.We present a serie of patients with facial fat infiltration enriched with platelet-derived growth factors, some of them associated to other surgical procedures (temporal lifting, cervico-frontal lifting, etc. We explain how to use this platelet - rich plasma to fill the tear - through and as a facial mesotherapy. Our purpose is to present a detailled review of our method: since blood extraction to the last obtention of the platelet - derived growth factors and the use of this plasma combined with fat infiltration in the facial area. With this methodology we have got better and more permanent results. We have evaluated 90-95 % fat grafts survival in malar region. In other facial areas such as lips or nasogenian folds (big movement areas, we only report about 50 to 60% fat graft survival.

J.M. Serra Renom

2006-09-01

94

Injertos de tejido adiposo: variables que influyen en la viabilidad del adipocito y de las células madre mesenquimales Fat grafting: variables that influence the viability of the adipocyte and mesenchimal stem cells  

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Full Text Available Si bien los injertos de tejido adiposo se han venido utilizando durante décadas a lo largo del siglo pasado, la técnica se venía considerando como poco útil dado que el injerto tendía a la reabsorción. Fue Coleman quien introdujo un sistema de obtención-procesamiento-infiltración atraumático que aumentó el porcentaje de supervivencia del injerto y la obtención de resultados positivos similares en su aplicación en todo el mundo. Aún así, la publicación de resultados dispares en la literatura respecto a la supervivencia del injerto, con diferentes porcentajes de reabsorción y el descubrimiento de las células madre en el tejido adiposo, han llevado a la realización de numerosos trabajos de investigación encaminados a comprender la biología del injerto de tejido adiposo, a estudiar el papel de las células madre en este proceso y la influencia que sobre la viabilidad celular tienen los distintos pasos a los que los cirujanos plásticos sometemos al tejido adiposo para su trasplante. Hemos hecho una revisión de la literatura científica al respecto para reunir la información disponible sobre estas controversias.Though adipose tissue grafts have been used for decades in last century, the technique has been considered as slightly usefull provided that the graft was tending to reabsorption. It was Coleman who introduced a system of atraumatic harvesting-processing-infiltration that increased the percentage of survival of the graft obtaining positive similar results in its application all over the world. Nonetheless, publication of unlike results in the literature regarding survival of the graft with different percentages of reabsorption and the discovery of stem cells in the adipose tissue, have led to the accomplishment of numerous research works directed to understanding the biology of the fat graft, the role of the stem cells in this process and the influence that the different steps for transplantation have on the cellular viability. We present a review of the scientific literature about the theme to bring together the available information about these controversies.

J. Benito Ruiz

2011-12-01

95

Dietary Fat  

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... Añadir en... Favorites Delicious Digg Google Bookmarks Dietary Fat What counts as fat? Are some fats better ... polyunsaturated and monounsaturated fats. How much total dietary fat do I need? The Dietary Guidelines for Americans ...

96

Skin graft  

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Skin transplant; Skin autografting; FTSG; STSG; Split thickness skin graft; Full thickness skin graft ... site. Most people who are having a skin graft have a split-thickness skin graft. This takes ...

97

Platelet-rich plasma greatly potentiates insulin-induced adipogenic differentiation of human adipose-derived stem cells through a serine/threonine kinase Akt-dependent mechanism and promotes clinical fat graft maintenance.  

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The potential plasticity and therapeutic utility in tissue regeneration of human adipose-derived stem cells (ASCs) isolated from adult adipose tissue have recently been highlighted. The use of autologous platelet-rich plasma (PRP) represents an alternative strategy in regenerative medicine for the local release of multiple endogenous growth factors. Here we investigated the signaling pathways and effects of PRP and human recombinant insulin on proliferation and adipogenic differentiation of ASCs in vitro. PRP stimulated proliferation (EC(50) = 15.3 ± 1.3% vol/vol), whereas insulin's effect was the opposite (IC(50) = 3.0 ± 0.5 ?M). Although PRP alone did not increase adipogenesis, in association with insulin it prevented ASC proliferative arrest, greatly enhanced intracytoplasmic lipid accumulation, strongly increased serine/threonine kinase Akt phosphorylation and mouse monoclonal anti-sterol regulatory element binding protein-1 accumulation, and downregulated Erk-1 activity; adipogenic effects were markedly prevented by the Akt inhibitor wortmannin. PRP with insulin synergistically upregulated fibroblast growth factor receptor (FGFR) and downregulated epidermal growth factor receptor (ErbB) expression; moreover, PRP in association prevented insulin-induced insulin-like growth factor-1 receptor and insulin receptor downregulation. The inhibition of FGFR-1, epidermal growth factor receptor (EGFR), and epidermal growth factor receptor-2 (ErbB2) activity reduced ASC proliferation, but only that of FGFR-1 reduced adipogenesis and Akt phosphorylation, whereas the ErbB2 inhibition effects were the opposite. However, EGFR activity was needed for ErbB2-mediated inhibition of ASC adipogenesis. Clinically, the injection of insulin further ameliorated patients' 1-year PRP-induced fat graft volume maintenance and contour restoring. Our results ascertain that PRP in association with insulin greatly potentiates adipogenesis in human ASCs through a FGFR-1 and ErbB2-regulated Akt mechanism. The ameliorated clinical fat graft maintenance suggests additional useful translational applications of combined PRP-insulin treatment in regenerative medicine. PMID:23197780

Cervelli, Valerio; Scioli, Maria G; Gentile, Pietro; Doldo, Elena; Bonanno, Elena; Spagnoli, Luigi G; Orlandi, Augusto

2012-03-01

98

Saturated Fat  

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... Añadir en... Favorites Delicious Digg Google Bookmarks Saturated Fat You may have heard that saturated fats are ... coconut oil. How do I control my saturated fat intake? In general, saturated fat can be found ...

99

Cartilage support for fascia graft in type I tympanoplasty.  

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To evaluate the success rate, in terms of anatomical and functional results, in our technique of cartilage support for fascia graft in type I tympanoplasty. Retrospective study of tragal cartilage support for fascia graft in tympanoplasty for large central perforation in 748 patients was carried at an academic institution during January 2004 to March 2012. Patients' age ranged from 11 to 65 years. 325 (43.4 %) male and 423 (56.6 %) female patients were operated and mean post-operative follow up was of 24 months (range 6-48 months). The inclusion criteria were large central or subtotal perforation, anterior quadrant perforation, anterior tympanosclerotic patch with perforation and revision myringoplasty. Small central perforation, posterior perforations, traumatic perforations and Ossiculplasty were excluded from this study. In this technique, a piece of tragal cartilage carved in semi lunar shape is inserted medial to anterior remnant of tympanic membrane. Temporalis fascia graft is sandwiched between cartilage and anterior remnant of tympanic membrane. Post-operative closure of perforation was noted. Pure-tone average pre and post-operative air-bone gap in dB at 250, 500, 1000, 2000, and 4,000 Hz were compared. The overall success rate of our technique was 98.3 % in terms of graft uptake and within 13.35 ± 5.22 dB of air bone gap closure in terms of hearing improvement. This study reveals that cartilage support for fascia graft in type I tympanoplasty is a highly reliable technique and gives significant improvement in graft take-up and hearing status. PMID:25032117

Kulkarni, Shreeya; Kulkarni, Vinay; Burse, Kiran; Sancheti, Vandana; Roy, Gaurav

2014-09-01

100

Bone Grafts  

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A bone graft transplants bone tissue. Surgeons use bone grafts to repair and rebuild diseased bones in your hips, knees, spine, and sometimes other bones and joints. Grafts can also repair bone loss caused by some ...

 
 
 
 
101

Trans Fat  

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... gov . Nutrition for Everyone Nutrition Topics Share Compartir Trans Fat Download Trans Fat: The Facts [PDF–2. ... 5 What Can Be Done To Reduce Artificial Trans Fat Everyone can: Read the Nutrition Facts label ...

102

Fat test  

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Nutrients include fats, protein, minerals, water, and carbohydrates. Brown paper can be used as an indicator of how much fat is in a food. The food that makes the largest grease spot has the most fat.

Olivia Worland (Purdue University;Biological Sciences)

2008-06-06

103

Megavolume autologous fat transfer: part II. Practice and techniques.  

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The authors describe the techniques that use the principles of fat grafting to allow them to successfully graft megavolumes (250-ml range) of autologous fat into breasts. The Brava external volume expansion device preoperatively increases the volume and vascularity of the recipient site. Low-pressure liposuction and minimal centrifugation are used to gently extract and purify the adipose tissue with minimal trauma. Even and diffuse reinjection of the fat increases graft-to-recipient interface and reduces interstitial fluid pressure. Postoperative Brava use protects the graft and acts as a three-dimensional immobilizing splint. By adhering to these techniques, we have been able to graft megavolumes of fat into the breasts of over 1000 patients and obtain substantial long-term volume retention. PMID:24867720

Khouri, Roger K; Rigotti, Gino; Cardoso, Eufemiano; Khouri, Roger K; Biggs, Thomas M

2014-06-01

104

Skin Graft  

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Skin graft is one of the most indispensable techniques in plastic surgery and dermatology. Skin grafts are used in a variety of clinical situations, such as traumatic wounds, defects after oncologic resection, burn reconstruction, scar contracture release, congenital skin deficiencies, hair restoration, vitiligo, and nipple-areola reconstruction. Skin grafts are generally avoided in the management of more complex wounds. Conditions with deep spaces and exposed bones normally require the use o...

Shimizu, Ruka; Kishi, Kazuo

2012-01-01

105

Megavolume autologous fat transfer: part I. Theory and principles.  

Science.gov (United States)

This article describes the theory and principles behind the authors' success in megavolume (250-ml range) autologous fat transfer to the breasts. When large volumes are grafted into a tight space, the interstitial fluid pressure increases to impair capillary blood flow and the crowded graft droplets coalesce into lakes, with poor graft-to-recipient interface. These factors have historically restricted the volume of fat that can be grafted into small recipient breasts. The decreased interface increases the distance oxygen must diffuse to reach the grafted adipocytes, causing central necrosis to occur before neovascularization. The increased interstitial fluid pressure reduces capillary radius, reducing oxygen delivery to grafted adipose tissue. The Brava external expansion device harnesses the regenerative capabilities of mechanical forces to preoperatively increase the volume and vascularity of the recipient site, allowing megavolumes of fat to be grafted diffusely without significantly decreasing graft-to-recipient interface or increasing interstitial fluid pressure. The application of these principles has allowed the authors to successfully graft megavolumes of fat into the breasts of over 1000 patients with substantial long-term retention. PMID:24572848

Khouri, Roger K; Rigotti, Gino; Cardoso, Eufemiano; Khouri, Roger K; Biggs, Thomas M

2014-03-01

106

Buccal fat pad in intraoral defect reconstruction.  

Science.gov (United States)

The use of buccal fat pad as a graft for intraoral defects is an uncommonly reported procedure but, it has been frequently used for closure of oro-antral and oro-nasal communications. Buccal fat pad was used to reconstruct 3 medium sized defects due to tumoral resection and oro-antral communication. It was used as an unlined pedicled graft. Three cases are discussed along with anatomical aspect of the buccal fat pad. The findings support the view that the buccal fat pad is versatile, logical, convenient, and reliable method for the reconstruction of oral defects up to 4-5 cm in diameter and it healed within 4-5 weeks. PMID:24431887

Bither, Saurab; Halli, Rajshekhar; Kini, Yogesh

2013-12-01

107

Polyunsaturated Fats and Monounsaturated Fats  

Science.gov (United States)

... Omega-3 Polyunsaturated Fat Sources Nuts Vegetable oils Canola oil Olive oil High oleic safflower oil Sunflower oil ... Soybean oil Corn oil Safflower oil Soybean oil Canola oil Walnuts Flaxseed Fish: trout, herring, and salmon Polyunsaturated ...

108

Fats and oils  

International Nuclear Information System (INIS)

The glycerin ethers with higher fat acids are named fats. Fats with residua off-peak higher acids present oils which pick out from plants. Fats and oils usually contain residua of carboxylic acids C10-C18

1998-01-01

109

Use of dermal-fat grafts in the post-oncological reconstructive surgery of atrophies in the zygomatic region: clinical evaluations in the patients undergone to previous radiation therapy  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Abstract Introduction Grafting of autologous adipose tissue can be recommended in some cases of facial plastic surgery. Rhabdomyosarcoma is a type of cancer that can also affect the orbit. Enucleation of the eye can cause atrophy of the corresponding hemiface and decreased orbital growth. Case report We report a case of a female patient with a medical history of surgical enucleation of the right eyeball, who had received rhabdomyosarcoma radiation therapy in her...

Inchingolo Francesco; Tatullo Marco; Pacifici Andrea; Gargari Marco; Inchingolo Alessio D; Inchingolo Angelo M; Dipalma Gianna; Marrelli Massimo; Abenavoli Fabio M; Pacifici Luciano

2012-01-01

110

Gum Graft Surgery  

Science.gov (United States)

... Periodontal Plastic Surgery Procedures Find a Periodontist Gum Graft Surgery Exposed tooth roots are the result of ... reduce sensitivity. What are the benefits of gum graft surgery? A gum graft can reduce further recession ...

111

Enhancing the take of injected adipose tissue by a simple method for concentrating fat cells.  

Science.gov (United States)

Injection of aspirated fat for the correction of tissue defects is a common procedure in plastic surgery. The reported rates of fat cell survival vary greatly in the medical literature, and different techniques of harvesting, processing, and reinjecting the fat cells are claimed to be responsible for these differences. However, there is no agreement concerning the best way to process the harvested fat before reinjection. The present study was initiated to examine and evaluate the effect of a simple method of isolating the fat particles on the outcome of fat graft survival. In this study, the nude mouse model was used to examine the survival and take of the fat graft concentrated before injection by the cumbersome recommended closed centrifugation technique in comparison with the authors' recommended open method, using an operating room cotton towel as a platform for concentrating the fat cells and separating them from fluids, oil, and debris. One milliliter of concentrated human fat cells preprocessed by towel separation was injected into the nuchal subcutis of 11 nude mice in the study group, and the same amount of fat that was preprocessed by centrifugation was injected into 11 control mice. Injected fat survived in both groups. No significant differences were found regarding fat graft weight and volume, although a tendency for better survival was noticed in the experimental group. Histologic evaluation of the grafts revealed significantly less fibrosis within the study group, meaning that the quality of the fat grafts was better. The authors found this method to be simple, cheap, and friendly to the surgeon in comparison with traditional processing using the centrifuge. PMID:15622250

Ramon, Yitzchak; Shoshani, Oren; Peled, Isaac J; Gilhar, Amos; Carmi, Nurit; Fodor, Lucian; Risin, Yaron; Ullmann, Yehuda

2005-01-01

112

Saturated fat (image)  

Science.gov (United States)

Saturated fat can raise blood cholesterol and can put you at risk for heart disease and stroke. You should ... limit any foods that are high in saturated fat. Sources of saturated fat include whole-milk dairy ...

113

Radiation initiated grafting  

International Nuclear Information System (INIS)

Various methods of grafting of vinyl monomers on to synthetic polymers have been presented with an emphasis for suppressing the parasitic homopolymerisation both in in-source grafting as well as post-irradiation grafting. The parameters like glass transition temperature of the polymer, preswelling, swelling along with grafting etc., have been considered in detail for obtaining the maximum graft yield with least homopolymerisation. Recent work carried out on grafting of vinyl monomers on to the synthetic fibres and films have been presented and discussed. Practical applications of radiation grafted materials are indicated. (author)

1980-08-01

114

Fat tissue as a new vascular carrier for prefabrication in reconstructive surgery: experimental study in rats.  

Science.gov (United States)

Several vascular carriers for different tissues were used for the purpose of fat tissue prefabrication. However, the inguinal fat pad in rats can be elevated with a vascular pedicle and considered as a vascular carrier. To the best of our knowledge, the fat tissue in rats as a vascular carrier has not been reported in any experimental studies to date. In our study, we aimed to describe a new prefabrication model in rats in which skin prefabrication was accomplished using the inguinal fat pad as a vascular carrier. Inguinal fat pads in rats were elevated over a superficial epigastric vessel pedicle in the pilot study. The contralateral inguinal fat pads were prepared as grafts. After 1 week, we compared the histopathological findings of the inguinal fat pad flaps and grafts and determined that the inguinal fat pad can be safely elevated over the vascular pedicle. In the experimental group, bilateral vascularised inguinal fat pads were transferred to the lower abdomen for skin prefabrication. After 3 weeks, bilateral fat-skin composite flaps including prefabricated lower abdomen skin were elevated over the vascular pedicles. One side was used as a composite flap while pedicle of the other side was transected at its origin at the femoral vessels to create the composite graft. Composite flap and graft were inserted at their original positions. One week later, the composite flaps were stained with India ink, perfused by fluorescein, and filled with contrast material for microangiographic study. In the histological examination, fat and skin tissues of the composite flaps were viable while those of the composite grafts were necrotic. Based on these findings, we can conclude that the fat tissue as a vascular carrier can be successfully used for tissue prefabrication in plastic surgery. PMID:18243831

Nasir, Serdar; Aydin, Mustafa Asim; Karahan, Nermin; Altunta?, Selman

2008-07-01

115

[Renal graft].  

Science.gov (United States)

After years of pioneering research and clinical applications, renal transplantation has now moved into the era of routine practice-the first line treatment for renal failure in more than 1500 new patients each year in France. Despite this success, transplantation is not a cure, it simply replaces one disease by another-immunodepression. As a result, over the next 20 years, 60% of the recipients will undoubtedly develop cancer. In addition, the life span of a transplanted kidney is shorter than that of the recipient. Consequently most of them will require a second graft 8 to 10 years after the first. Together with the development of new innovating immunology agents such as FK 506 and mycophenolate, for example, these current facts raise the challenging question of the future for renal transplantation. Will adequation between donors and recipients be achieved? Should we develop single organ transplantation units within our current nephrology-urology structures or create multiorgan units devoted solely to transplantation? And finally, will (or perhaps when will) progress in immunology completely control the problem of organ rejection? One technical point is also of interest. Being (with orthopaedic surgery) one of the rare indications where open surgery can be expected to continue over the next 20 years, renal transplantation units will play an essential role in training future surgeons. PMID:8545355

Benoit, G

1995-10-28

116

Grafting and curing  

International Nuclear Information System (INIS)

Progress in radiation grafting and curing is briefly reviewed. The two processes are shown to be mechanistically related. The parameters influencing yields are examined particularly for grafting. For ionising radiation grafting systems (EB and gamma ray) these include solvents, substrate and monomer structure, dose and dose-rate, temperature and more recently role of additives. In addition, for UV grafting, the significance of photoinitiators is discussed. Current applications of radiation grafting and curing are outlined. The recent development of photoinitiator free grafting and curing is examined as well as the potential for the new excimer laser sources. The future application of both grafting and curing is considered, especially the significance of the occurrence of concurrent grafting during cure and its relevance in environmental considerations

1998-06-01

117

Coronary Artery Bypass Graft  

Medline Plus

Full Text Available Coronary Artery Bypass Graft Introduction Sometimes people have serious problems with their heart and the arteries that go into it. Coronary artery bypass graft surgery, or CABG, bypasses clogged arteries in the ...

118

Comparing iterated grafting and grafting rays  

CERN Document Server

Let X be a closed oriented hyperbolic surface and gamma a simple closed geodesic, which is short on X. We show that the iterated grafting (gr_{t gamma} gr_{s gamma} X) is close to the grafting ray (gr_{(s+T) gamma} X) in the Teichmueller metric, where the bounds depend on the length of gamma only. Using this result, we show that the holonomy lifts (gr^n_{2 pi gamma} gr_{t gamma} X) of a grafting ray all lie in a r-tube around the ray (gr_{t gamma} X) and the rays (gr_{t gamma} gr^n_{2 pi gamma} X) accumulate exponentially fast (in n) in the Hausdorff topology. Finally we study the asymptotic behaviour of grafting rays and iterated grafting sequences and show that both gr_{t gamma} X and gr^n_{2 pi gamma} X) converge geometrically to a cusped surface for any X and gamma.

Hensel, Sebastian

2008-01-01

119

What Are the Types of Fat?  

Science.gov (United States)

... move.va.gov What Are the Types of Fat? Most foods contain several different kinds of fat. ... harmful dietary fats. The four major types of fats are: • Monounsaturated fats • Polyunsaturated fats • Saturated fats • Trans ...

120

Dietary Fat and Cholesterol  

Science.gov (United States)

... of fat. There are two essential fatty acids (linolenic and linoleic) that your body uses to make ... pressure, blood clotting, and your immune system response. Linolenic fatty acids are a special type of fat ...

 
 
 
 
121

Body Fat Measurement Tools  

Science.gov (United States)

... Cyberkitchen Fitness Center Shape Up & Drop 10 Body Fat Lab Adult Obesity Assessment Pregnancy Weight Gain Children ... Contact List Request for Support Measurement Tools Body fat has many important functions. It is: a "storage ...

122

Toxicity of abdominal fat  

Directory of Open Access Journals (Sweden)

Full Text Available Abdominal fat or truncal obesity consists of both subcutaneous and visceral fat. It has been found that visceral fat is more metabolically active than subcutaneous fat. The low-level inflammation linked with abdominal fat is associated with insulin resistance and with increases in the release of inflammatory adipokines and cytokines. As a result of these changes, abdominal fat can cause a variety of health conditions. In this review, we focus on the adverse effects of abdominal fat on the body and how it can lead to the development of cardiovascular disease, hypertension, type 2 diabetes mellitus, hyperlipidemia, stroke and cancer. Additionally, we discuss how abdominal fat can be reduced as a result from correction of hormonal deficiencies.

Shawn Mathew

2013-08-01

123

A Fat Higgs with a Fat Top  

CERN Multimedia

A new variant of the supersymmetric Fat Higgs model is presented in which the MSSM Higgses as well as the top quark are composite. The underlying theory is an s-confining SU(3) gauge theory with the MSSM gauge groups realized as gauged sub-groups of the chiral flavor symmetries. This motivates the large Yukawas necessary for the large top mass and SM-like Higgs of mass>>M_Z in a natural way as the residual of the strong dynamics responsible for the composites. This removes fine-tuning associated with these couplings present in the original Fat Higgs and New Fat Higgs models, respectively.

Delgado, A; Delgado, Antonio; Tait, Tim M.P.

2005-01-01

124

Axillobifemoral bypass grafting  

Digital Repository Infrastructure Vision for European Research (DRIVER)

INTRODUCTION Axillo-femoral bypass (AxF) means connecting the axillar and femoral artery with the graft that is placed subcutaneously [1]. Usually, this graft is connected with contralateral femoral artery via one accessory subcutaneous graft, and this connection is known as axillobifemoral bypass (AxFF). This extra-anatomic procedure is an alternative method to the standard reconstruction of aortoiliac region when there are contraindications for general or local reasons. OBJECTIVE The object...

2004-01-01

125

Engineered vascularized bone grafts  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Clinical protocols utilize bone marrow to seed synthetic and decellularized allogeneic bone grafts for enhancement of scaffold remodeling and fusion. Marrow-derived cytokines induce host neovascularization at the graft surface, but hypoxic conditions cause cell death at the core. Addition of cellular components that generate an extensive primitive plexus-like vascular network that would perfuse the entire scaffold upon anastomosis could potentially yield significantly higher-quality grafts. W...

Tsigkou, Olga; Pomerantseva, Irina; Spencer, Joel A.; Redondo, Patricia A.; Hart, Alison R.; O’doherty, Elisabeth; Lin, Yunfeng; Friedrich, Claudia C.; Daheron, Laurence; Lin, Charles P.; Sundback, Cathryn A.; Vacanti, Joseph P.; Neville, Craig

2010-01-01

126

Fat embolism syndrome  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Fat embolism syndrome (FES) is an ill-defined clinical entity that arises from the systemic manifestations of fat emboli within the microcirculation. Embolized fat within capillary beds cause direct tissue damage as well as induce a systemic inflammatory response resulting in pulmonary, cutaneous, neurological, and retinal symptoms. This is most commonly seen following orthopedic trauma; however, patients with many clinical conditions including bone marrow transplant, pancreatitis, and follow...

2013-01-01

127

Calcar bone graft  

International Nuclear Information System (INIS)

A canine model was developed to investigate the use of an autogeneic iliac bone graft to treat the calcar deficiency commonly found at the time of revision surgery for femoral component loosening. Five large male mixed-breed dogs had bilateral total hip arthroplasty staged at three-month intervals, and were sacrificed at six months. Prior to cementing the femoral component, an experimental calcar defect was made, and a bicortical iliac bone graft was fashioned to fill the defect. Serial roentgenograms showed the grafts had united with no resorption. Technetium-99 bone scans showed more uptake at three months than at six months in the graft region. Disulfine blue injection indicated all grafts were perfused at both three and six months. Thin section histology, fluorochromes, and microradiographs confirmed graft viability in all dogs. Semiquantitative grading of the fluorochromes indicated new bone deposition in 20%-50% of each graft at three months and 50%-80% at six months. Although the calcar bone graft was uniformly successful in this canine study, the clinical application of this technique should be evaluated by long-term results in humans

1986-01-01

128

A fat strange repeller  

International Nuclear Information System (INIS)

This article reports an observation on a fat strange repeller, which appears after a characteristic crisis observed in a kicked rotor subjected to a piecewise continuous force field. The discontinuity border in the definition range of the two-dimensional mapping, which describes the system, oscillates as the discrete time develops. At a threshold of a control parameter a fat chaotic attractor suddenly transfers to a fat transient set. The strange repeller, which appears after the crisis, is also a fat fractal. This is the reason why super-transience happens. (authors)

2004-08-01

129

[Graft vs host disease].  

Science.gov (United States)

Graft vs host disease is a serious immunological complication of allogeneic haematopoietic cell transplantation, leading to a significant morbidity and mortality. It occurs when donor T lymphocyte react to foreign host cells. The physiopathology is a more complex process implicating host tissues damage caused by the conditioning regimen, cytokines, cellular effectors implicated in the immune response such as donor lymphocytes T, antigen presenting cells and mechanisms of apoptosis. This review focuses on the physiopathological basis, risk factors, clinical aspects; prevention and current management strategies to treat graft vs host disease. Recent developments in our understanding of this bone marrow transplantation complication have profoundly influenced the practice of allogeneic haematopoietic cell transplantation. There is a growing realisation of the importance of a graft vs leukaemia effect, strategy, which has encouraged the development of less conditioning regimens. Segregation between graft vs host effect and graft vs leukaemia effect is a key challenge, and could lead to new efficient and specific immunotherapy. PMID:16530350

Moalic, V; Ferec, C

2006-05-01

130

Sliding grafted polymer layers  

CERN Document Server

We study theoretically the structure of sliding grafted polymer layers or SGP layers. These interfacial structures are built by attaching each polymer to the substrate with a ring-like molecule. Such a topological grafting mode allows the chains to freely slide along the attachment point. Escape from the sliding link is prevented by bulky capping groups. We show that grafts in the mushroom regime adopt mainly symmetric configurations (with comparable branch sizes) while grafts in dense layers are highly dissymmetric so that only one branch per graft participates in the layer. Sliding layers on small colloids or star-like sliding micelles exhibit an intermediate behavior where the number of longer branches participating in the corona is independent of the total number of branches. This regime also exists for sliding surface-micelles comprising less chains but it is narrower.

Baulin, V A; Marques, C M; Baulin, Vladimir A.; Johner, Albert; Marques, Carlos M.

2005-01-01

131

Fat Emulsions for Injection  

Science.gov (United States)

Your doctor has ordered fat emulsion to be used as a source of calories and fatty acids to maintain or increase your weight. The medication ... Before you administer fat emulsion, look at the solution closely. It should be free of floating material. Gently squeeze the bag or observe ...

132

Fat and bone interactions.  

Science.gov (United States)

Fat and bone have a complicated relationship. Although obesity has been associated with low fracture risk, there is increasing evidence that some of the factors that are released by peripheral fat into the circulation may also have a deleterious effect on bone mass, thus, predisposing to fractures. More importantly, the local interaction between fat and bone within the bone marrow seems to play a significant role in the pathogenesis of age-related bone loss and osteoporosis. This "local interaction" occurs inside the bone marrow and is associated with the autocrine and paracrine release of fatty acids and adipokines, which affect the cells in their vicinity including the osteoblasts, reducing their function and survival. In this review, we explore the particularities of the fat and bone cell interactions within the bone marrow, their significance in the pathogenesis of osteoporosis, and the potential therapeutic applications that regulating marrow fat may have in the near future as a novel pharmacologic treatment for osteoporosis. PMID:24599601

Bermeo, Sandra; Gunaratnam, Krishanthi; Duque, Gustavo

2014-06-01

133

Crosslinked grafted PVC obtained by direct radiation grafting  

Science.gov (United States)

Direct radition-induced grafting of 4-vinylpyridine onto both pure and plasticized poly(vinyl chloride) has been studied. The effect of grafting conditions such as solvent, monomer concentration, irradiation dose, and inhibitor concentration on the grafting yield was investigated. The grafting process was enhanced by using distilled water as diluent and higher degrees of grafting were obtained as compared with other solvents used (benzene, methanol, and a mixture of methanol and water). The homopolymerization of 4-vinylpyridine was reduced to a minimum using ammonium ferrous sulfate and the suitable optimum concentration of the inhibitor was found to be 0.25 wt %. It was observed that the degrees of grafting onto plasticized PVC were higher than those onto pure one, at constant grafting conditions. The diffusibility of the monomer solution through the trunk polymers enhanced at higher monomer concentrations. The higher the monomer concentration the higher the degrees of grafting obtained. The dependence of the grafting rate on monomer concentration was found to be 0.15 and 0.4 order for the grafting onto pure and plasticized PVC films, respectively. The degree of grafting, at the higher irradiation doses, deviated from linearity and it tends to level off due to the recombination of some of the free radicals without initiating graft polymerization. Gel determination in the grafted films was investigated. The gel content in both grafted extracted pure and plasticized PVC films increased with the degree of grafting to reach a certain limiting values.

Hegazy, El-Sayed A.; Dessouki, Ahmed M.; El-Dessouky, Maher M.; El-Sawy, Naeem M.

134

Rib grafts in septorhinoplasty  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Autogenous cartilage has generally been considered the gold standard grafting material in reconstructive septorhinoplasty for volume filling and structural support. In the restructuring of the nasal skeleton, autogenous cartilage can be harvested from the nasal septum, the auricle or the rib, but costal cartilage is considered the best graft material in patients requiring major reconstruction. Rib cartilage is an outstanding material in reconstructive septorhinoplasty, especially in revision ...

Moretti, A.; Sciuto, S.

2013-01-01

135

Alternative fat sources to animal fat for pigs  

DEFF Research Database (Denmark)

The use of fats and oils in diets for pigs is of great importance due to their high energy value. As a consequence of the BSE-crisis in the European Union, the amount of animal fat available for animal feeds has been reduced, and alternative fat sources are of increasing importance. In this paper, we review our main findings on the effects of diets with different fat sources on apparent fat digestibility in pigs. A method for quantitative measurement of fat extraction from feed and faeces has been developed, and this method has been used in a digestibility trial, in which diets added 5% of either animal fat, palm oil mix, palm oil, vegetable oil mix, coconut oil, or rapeseed oil were tested in weaned and growing pigs. It was concluded that several vegetable fat sources (palm oil mix, palm oil, coconut oil, rapeseed oil) could be used as alternatives to animal fat in pig feed, whereas fat blends should be avoided.

Lauridsen, Charlotte; Christensen, Thomas Bruun

2007-01-01

136

What Are Solid Fats?  

Science.gov (United States)

... stick margarine shortening hydrogenated and partially hydrogenated oils* coconut oil* palm and palm kernel oils* * The starred items ... and from fish. A few plant oils, including coconut oil and palm oil, are high in saturated fats ...

137

[Spuriously unhealthy animal fats].  

Science.gov (United States)

Animal fats are generally considered as a source of saturated fatty acids and cholesterol, identified with arteriosclerosis and its clinical complications (cardiovascular diseases with heart attack, stroke, cerebral claudication). The real reason of arteriosclerosis are inflammation states of blood vessel endothelium caused by oxidative stress, hiperhomocysteinemia, hipertrigliceridemia, presence of artificial trans isomers and excess of eicosanoids originated from poliunsaturated fatty acids n-6. Present status of science proves that both saturated fatty acids and cholesterol present in animal food can not cause inflammation state. Moreover, animal fats are source of antioxidants active both in food and in human organism. Due to high oxidative stability animal fats do not make threat to human health. Milk fat, though high content of saturated fatty acids and cholesterol, possesses comprehensive pro-health activity--against arteriosclerosis and cancerogenesis. PMID:22299537

Cichosz, Grazyna; Czeczot, Hanna

2011-11-01

138

The significance of graft diameter.  

Science.gov (United States)

To study the influence of diameter on graft patency, an 8 mm aortoiiliac Dacron graft was implanted in on leg of 25 dogs that had liac arteries 3 to 5 mm in diameter and a 5 mm graft was placed in the other leg. In six dogs both grafts clotted within 3 months, in 10 dogs both grafts remained patient until the dogs were killed between 7 and 66 months, and in nine dogs one graft became occluded before the other. In eight of these nine animals the 8 mm graft became occluded before the 5 mm graft; only in one dog did the 5 mm graft become occluded first. When the 10 dogs with two patient grafts were killed, the 8 mm graft was found to be lined with thick, organized fibrin, whereas the 5 mm graft had a thin, smooth, glistening lining. Histologic examination confirmed that healing was more complete in the 5 mm graft. In vivo blood flow measurements in the dogs were used to compare flow rates and graft resistance in 4, 6, 8, 10, and 12 mm grafts. A given sized graft carried the same flow capacity as larger grafts until the flow rate was reached when graft resistance developed. Once resistance appeared, the graft could still triple or quadruple its flow capacity but it could not deliver the same rate of flow under the same pressure head as larger grafts. In 4 mm grafts, resistance first appeared at approximately 150 cc/min and capacity was 450 cc. In 6 mm grafts, resistance developed at 400 cc/min and capacity exceeded 1,200 cc. In 8 and 10 mm grafts, resistance was first noted at 800 and 1.400 cc/min, respectively. These studies suggest that 6 mm diameter grafts can carry the 200 cc/min or less that is measured in the human superficial femoral artery at rest, as well as the four-to sixfold increase that accompanies vigorous exercise. PMID:7444766

Sanders, R J; Kempczinski, R F; Hammond, W; DiClementi, D

1980-12-01

139

Axillobifemoral bypass grafting  

Directory of Open Access Journals (Sweden)

Full Text Available INTRODUCTION Axillo-femoral bypass (AxF means connecting the axillar and femoral artery with the graft that is placed subcutaneously [1]. Usually, this graft is connected with contralateral femoral artery via one accessory subcutaneous graft, and this connection is known as axillobifemoral bypass (AxFF. This extra-anatomic procedure is an alternative method to the standard reconstruction of aortoiliac region when there are contraindications for general or local reasons. OBJECTIVE The objective of this paper is to show early and late results of AxFF bypass grafting as well as to show the indications for AxFF bypass. METHODS The sample consisted of 37 patients. The procedure was performed in 28 patients who suffered from aortoiliac occlusive disease and who were at high risk due to the comorbidity- in one patient with the rupture of juxtarenal aneurysm of abdominal aorta; in five patients with aortoenteric fistula, in two patients with iatrogenic lesion of abdominal aorta and in one female patient with anus preternaturalis definitivus who was treated for rectovaginal fistula. Donor's right axillary artery was used in 26 cases (70.3%, and donor's left axillary artery was used in 9 cases (29.7%. Dacron graft was used in 34 patients and Polytetrafluo-roethlylene graft was used in three patients. Simultaneously, profundo-plastic was done in four patients and femoro-popliteal bypass was performed in three patients. In five patients who suffered from aortoenteric fistula, simultaneous intervention of gastrointerstinal system has been done, x2 test was used for statistical evaluation and life table method was used for verification of late graft patency. RESULTS The rate of early postoperative mortality was 13.5%. The causes of death were: sepsis -1, MOFS - 3, and infarct myocardium -1. The mean follow up period was 40.1 months, ranging from six months to 17 years. During the follow up period, an early graft thrombosis was identified in two and late graft occlusion was reported in four patients. As the cause of occlusion, the progression of occlusive disease of receptive artery was identified in three patients, while anastomotic neointimae hyperplasia of recipient artery was identified in one patient. Three patients died during the follow up period. As the cause of death, CVI was reported in two patients and malignancy of the urinary tract was fpund in one patient. The other complications were - artery angulation on the level of proximal anastomosis in one patient (Figure 1, false aneurysm in one patient, perigraft seroma in one patient and graft infection in three patients. Life table method has shown that cumulative rate of late graft patency is 80.39% after five years (Graph 1. DISCUSSION Our results were analyzed and compared with the results of the study on 283 patients who had undergone aortobifemoral bypass (AFF operation due to the aortoiliac occlusive disease. This study was completed in 1995 (18. The results showed that there was no statistically significant differences between AxFF and AFF group (p>0.05, considering early mortality rate and late graft patency (Graph 2. The review of mortality and late patency rate after AxFF bypass grafting in a world well known studies has shown the similar results (Table 1. CONCLUSION The authors suggest that axilobifemoral bypass is indicated when there are contraindications or difficulties to perform anatomic reconstruction due to the abdomen condition (infection, adhesion, comorbidity as well as in high risk patients with low life expectancy.

Davidovi? Lazar B.

2004-01-01

140

Dietary fat consumption and health.  

Science.gov (United States)

Dietary Guidelines have emerged over the past 30 years recommending that Americans limit their consumption of total fat and saturated fat as one way to reduce the risk of a range of chronic diseases. However, a low-fat diet is not a no-fat diet. Dietary fat clearly serves a number of essential functions. For example, maternal energy deficiency, possible exacerbated by very low-fat intakes (balance energy consumption with energy needs. In each of the age/gender groups reporting consumption of < or = 30% of energy from fat and less than 10% of energy from saturated fatty acids, fat-modified foods play a more important role in their diets than for people who are consuming higher levels of fat and saturated fat. The data are clear than fat-modified foods make a more significant contribution to diets of consumers with low-fat intakes. While one cannot argue cause and effect from the results presented, the patterns of fat-modified foods/low-fat intakes are consistent. The focus on overall diet quality is often lost in the national obsession with lowering fat inta PMID:9624878

Lichtenstein, A H; Kennedy, E; Barrier, P; Danford, D; Ernst, N D; Grundy, S M; Leveille, G A; Van Horn, L; Williams, C L; Booth, S L

1998-05-01

 
 
 
 
141

Radiation grafted adhesive primers  

International Nuclear Information System (INIS)

Electron-beam and UV radiation can induce covalent attachment of unsaturated monomers onto a variety of polymer surfaces. The surface characteristics of a polymeric material can therefore be precisely manipulated by grafting the proper combination of monomers onto the surface. Radiation-grafted, sterically nonhindered tertiary acrylamides behave surprisingly well as primers for acidic pressure-sensitive adhesives. Physical and spectroscopic analyses of grafted acrylamides indicate that this unusual behavior is due to hydrogen bonding between the amide functionality in the primer and the acid functionality in the adhesive. Primary and secondary acrylamides are postulated to be less effective because they have the tendency to form hydrogen bonded dimers within the primer rather than interacting with the adhesive. (author)

1985-01-01

142

Alveolar bone grafting  

Directory of Open Access Journals (Sweden)

Full Text Available In patients with cleft lip and palate, bone grafting in the mixed dentition in the residual alveolar cleft has become a well-established procedure. The main advantages can be summarised as follows: stabilisation of the maxillary arch; facilitation of eruption of the canine and sometimes facilitation of the lateral incisor eruption; providing bony support to the teeth adjacent to the cleft; raising the alar base of the nose; facilitation of closure of an oro-nasal fistula; making it possible to insert a titanium fixture in the grafted site and to obtain favourable periodontal conditions of the teeth within and adjacent to the cleft. The timing of the ABG surgery take into consideration not only eruption of the canine but also that of the lateral incisor, if present. The best time for bone grafting surgery is when a thin shell of bone still covers the soon erupting lateral incisor or canine tooth close to the cleft.

Lilja Jan

2009-10-01

143

Vascular graft infections.  

Science.gov (United States)

Prosthetic vascular grafting is a commonly performed procedure that is central to the management of arterial disease and renal failure. Though rare, vascular graft infections (VGI) are potentially devastating, and carry a high rate of mortality and amputation. Despite extensive research and clinical experience, VGI remain a daunting therapeutic challenge for surgeons and infectious disease specialists. This article reviews the pathogenesis of VGI, in particular the role of biofilms, as well as the current state of clinical management including diagnostic modalities, surgical options for treatment, antimicrobial therapy, and preventive measures. PMID:22284375

Young, Michael H; Upchurch, Gilbert R; Malani, Preeti N

2012-03-01

144

Ruptured saphenous vein graft aneurysm.  

Science.gov (United States)

Ruptured saphenous vein graft (SVG) aneurysm is a rare source of significant morbidity and mortality. SVG is a common technique of coronary artery bypass grafting (CABG), but vein graft aneurysm and ruptured SVG aneurysm have not received the required attention as only few case reports exist. We present the case of a 50-year old man with ruptured vein graft aneurysm who had significant postoperative complications following surgery, and outline some preventive/management strategies. PMID:24288341

Gukop, Philemon; Karapanagiotidis, Georgios T; Chandrasekaran, Venkatachalam

2014-06-01

145

Dynamical fat link fermions  

CERN Multimedia

The use of APE smearing or other blocking techniques in fermion actions can provide many advantages. There are many variants of these fat link actions in lattice QCD currently, such as FLIC fermions. Frequently, fat link actions make use of the APE blocking technique in combination with a projection of the blocked links back into the special unitary group. This reunitarisation is often performed using an iterative maximisation of a gauge invariant measure. This technique is not differentiable with respect to the gauge field and thus prevents the use of standard Hybrid Monte Carlo simulation algorithms. The use of an alternative projection technique circumvents this difficulty and allows the simulation of dynamical fat link fermions with standard HMC and its variants.

Kamleh, W; Williams, A G; Kamleh, Waseem; Leinweber, Derek B.; Williams, Anthony G.; 10.1016/j.nuclphysbps.2003.12.058

2004-01-01

146

Fat Embolism Syndrome  

Directory of Open Access Journals (Sweden)

Full Text Available The characteristics of fat embolism syndrome (FES, and the complications occurring in fractures of long bones or pelvic bones are considered. Clinical picture classically develops after “lucid space“, then appear pulmonary and neurological manifestations combined with petechial hemorrhage. Basic theories of FES pathophysiology are analyzed. Early signs are likely to be caused by mechanic vascular occlusion by fat globules. Vascular occlusions in FES are frequently temporary or partial as fat globules block capillary blood flow incompletely due to their flowability and deformity. The diagnosis is made based on clinical presentations using A.R. Gurd’s criteria (1970. Laboratory and instrumental methods are used for clinical diagnosis confirmation or therapy monitoring. The treatment is aimed mainly at supporting respiratory function and hemodynamics stabilization. Prevention, early diagnosis and adequate symptomatic treatment are of primary importance.

?.?. Gabdullin

2012-03-01

147

Scaling in fat fractals  

Energy Technology Data Exchange (ETDEWEB)

Fat fractals are fractals with positive measure and integer fractal dimension. Their dimension is indistinguishable from that of nonfractals, and is inadequate to describe their fractal properties. An alternative approach can be couched in terms of the scaling of the coarse grained measure. For the more familiar ''thin'' fractals, the resulting scaling exponent reduces to the fractal codimension, but for fat fractals it is independent of the fractal dimension. Numerical experiments on several examples, including the chaotic parameter values of quadratic mappings, the ergodic parameter values of circle maps, and the chaotic orbits of area preserving maps, show a power law scaling, suggesting that this is a generic form. This paper reviews several possible methods for defining coarse grained measure and associated fat fractal scaling exponents, reviews previous work on the subject, and discusses problems that deserve further study.

Farmer, J.D.

1985-01-01

148

Dynamical fat link fermions  

Energy Technology Data Exchange (ETDEWEB)

The use of APE smearing or other blocking techniques in fermion actions can provide many advantages. There are many variants of these fat link actions in lattice QCD currently, such as FLIC fermions. Frequently, fat link actions make use of the APE blocking technique in combination with a projection of the blocked links back into the special unitary group. This reunitarisation is often performed using an iterative maximisation of a gauge invariant measure. This technique is not differentiable with respect to the gauge field and thus prevents the use of standard Hybrid Monte Carlo simulation algorithms. The use of an alternative projection technique circumvents this difficulty and allows the simulation of dynamical fat link fermions with standard HMC and its variants.

Kamleh, Waseem; Leinweber, Derek B.; Williams, Anthony G

2004-02-01

149

Dynamical fat link fermions  

International Nuclear Information System (INIS)

The use of APE smearing or other blocking techniques in fermion actions can provide many advantages. There are many variants of these fat link actions in lattice QCD currently, such as FLIC fermions. Frequently, fat link actions make use of the APE blocking technique in combination with a projection of the blocked links back into the special unitary group. This reunitarisation is often performed using an iterative maximisation of a gauge invariant measure. This technique is not differentiable with respect to the gauge field and thus prevents the use of standard Hybrid Monte Carlo simulation algorithms. The use of an alternative projection technique circumvents this difficulty and allows the simulation of dynamical fat link fermions with standard HMC and its variants

2004-02-01

150

Fat heaps : Source code  

DEFF Research Database (Denmark)

This report is an electronic appendix to our paper \\Fat heaps without regular counters". In that paper we described a new variant of fat heaps that is conceptually simpler and easier to implement than the original version. We also compared the practical performance of this data structure to that of other related data structures (run-relaxed weak queues and Fibonacci heaps). This report to- gether with an accompanying tar le gives the source code used in the experiments reported in the paper. By making the programs publicly available, we provide other researchers the opportunity to scrutinize the code and compare their own imple- mentations against ours.

Elmasry, Amr Ahmed Abd Elmoneim; Katajainen, Jyrki

2011-01-01

151

Slicing, skinning, and grafting  

CERN Multimedia

We prove that a Bers slice is never algebraic, meaning that its Zariski closure in the character variety has strictly larger dimension. A corollary is that skinning maps are never constant. The proof uses grafting and the theory of complex projective structures.

Dumas, David

2007-01-01

152

Coronary Artery Bypass Graft  

Medline Plus

Full Text Available ... bypass surgery may not succeed in bypassing the blockage. Even when the blockage is bypassed, the graft itself could, on rare ... daily activities. To decrease the chances of new blockages in your arteries: • You should avoid smoking. • You ...

153

Comparison of Fat7-bar and HYP fat links  

CERN Multimedia

We study various methods of constructing fat links based upon the HYP (by Hasenfratz & Knechtli) and Fat7-bar (by W. Lee) algorithms. We present the minimum plaquette distribution for these fat links. This enables us to determine which algorithm is most effective at reducing the spread of plaquette values.

Bilson-Thompson, S O

2004-01-01

154

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... fats. The presumption has been that polyunsaturated fatty acids are generally friendlier to the heart than saturated ... of polyunsaturated fats such as omega-3 fatty acids, whether through food or daily supplements, significantly reduces ...

155

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... dietary fats. The presumption has been that polyunsaturated fatty acids are generally friendlier to the heart than saturated ... amounts of polyunsaturated fats such as omega-3 fatty acids, whether through food or daily supplements, significantly reduces ...

156

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... the lower right-hand corner of the player. Dietary Fats and Your Heart HealthDay March 21, 2014 Related MedlinePlus Pages Dietary Fats Heart Diseases--Prevention Transcript In recent years, nutritional ...

157

Big, Fat World of Lipids  

Science.gov (United States)

... Articles | Inside Life Science Home Page The Big, Fat World of Lipids Emily Carlson Posted August 9, ... the doctor typically provides your levels of three fats found in the blood: LDL, HDL and triglycerides. ...

158

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... lower right-hand corner of the player. Dietary Fats and Your Heart HealthDay March 21, 2014 Related MedlinePlus Pages Dietary Fats Heart Diseases--Prevention Transcript In recent years, nutritional ...

159

That Fat Cat  

Science.gov (United States)

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…

Lambert, Phyllis Gilchrist

2012-01-01

160

Current status of arterial grafts for coronary artery bypass grafting.  

Science.gov (United States)

For over a decade there has been accumulating evidence that the use of more than a single arterial graft during coronary artery bypass grafting can improve clinical outcomes. However the vast majority of patients in most developed countries still only receive a single arterial conduit even in the presence of multivessel coronary artery disease. This review summarizes the current evidence for the use of a second internal mammary artery and/or radial artery graft. While in comparison to vein grafts the superior patency of internal mammary artery grafts is well established, there now exists strong and consistent evidence of the superior patency of radial arteries over the longer term. Likewise, there is a rapidly growing body of evidence that the superior patency of both these arteries in comparison to vein grafts translates into improved clinical outcomes. PMID:23977618

Taggart, David P

2013-07-01

 
 
 
 
161

Radiation grafted polypropylene films  

Energy Technology Data Exchange (ETDEWEB)

Irradiation of polypropylene films by gamma or electron beam radiation leads to severe degradation of the polymer. Controlling the polypropylene's morphology upon processing produces a mesomorphic polypropylene film that is resistant to gamma or electron beam radiation for storage periods of at least 4 months. This mesomorphic polypropylene film provides a film base for the graft polymerization of reactive monomers to the film surface to improve such properties as hydrophilicity, hydrophobicity, adhesion and ion exchange capacity. (author).

Rolando, R.J.; Krueger, D.L. (3M Center, St. Paul, MN (USA). Corporate Research)

1990-01-01

162

Alveolar bone grafting  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In patients with cleft lip and palate, bone grafting in the mixed dentition in the residual alveolar cleft has become a well-established procedure. The main advantages can be summarised as follows: stabilisation of the maxillary arch; facilitation of eruption of the canine and sometimes facilitation of the lateral incisor eruption; providing bony support to the teeth adjacent to the cleft; raising the alar base of the nose; facilitation of closure of an oro-nasal fistula; making it possible t...

Lilja Jan

2009-01-01

163

Preparation of anionic fibrous catalyst by radiation graft polymerization for biodiesel synthesis  

International Nuclear Information System (INIS)

Anionic fibrous catalyst for biodiesel production from vegetable oils and animal fats was synthesized through radiation induced graft polymerization of 4-chloromethylstyrene (CMS) onto a nonwoven polyethylene (NWPE) fabric followed by amination with trimethylamine (TMA). The influence of grafting degree of the TMA-CMS-g-NWPE at 0.25 M TMA concentration was investigated by elemental analyzer, FTIR and TGA. Results show that the density of trimethylammonium group increased with the degree of grafting. However, thermal properties of the TMA-CMS-g-NWPE reduced with the degree of grafting. The preliminary transesterification test on triolein/ethanol/decane solution using selected TMA-CMS-g-NWPE containing 3.01 mmol/g trimethylammonium found that 98% the triolein can be converted into biodiesel within 4 h reaction. High conversion of rapeseed oil into biodiesel provides more information on the capability of TMA-CMS-g-NWPE as ion exchanger for biodiesel production. (Author)

2008-08-26

164

Fat Replacers in Meat Products  

Directory of Open Access Journals (Sweden)

Full Text Available There is a great interest regarding demand for foods with health enhancing properties as low-fat meat products due to the human health and nutrition correlation. Various aspects of interest relating to product design and fat reducing strategy has been reported. These aspects concerning nutritional, sensory, technological, safety, appreciation, legal and cost procedures are important to a improved new product design. Due to their different texture properties, processing conditions and different quality evaluations used in the reformulated meat derivatives, the feasibility of low-fat meat products manufacturing has been investigated. In previous review paper, various factors such as consumer acceptability, technological, emerging strategies for the modification of meat fat level, fatty acid (FA composition, and non-meat ingredients or fat-replacers for the production were monitored for low-fat meat products and fat reduction concept.

Ozlem Tokusoglu

2003-01-01

165

The trochanteric fat pad  

Directory of Open Access Journals (Sweden)

Full Text Available Technological developments based on the use of autologous white adipose tissue (WAT attracted attention to minor fat depots as possible sources of adipose tissue. In plastic surgery, the trochanteric fatty pad is one of the most used WAT depots for its location and organoleptic characteristics that make it particularly suitable for reconstructive procedures. Despite its wide use in clinic, the structure of this depot has never been studied in detail and it is not known if structural differences exist among trochanteric fat and other subcutaneous WAT depots. The present study was performed on trochanteric fat pad with the aim to clarify the morphology of its adipocytes, stroma and microcirculation, with particular reference to the stem niches. Histological and ultrastructural studies showed that the main peculiar feature of the trochanteric fat concerns its stromal component, which appears less dense than in the other subcutaneous WATs studied. The intra-parenchymal collagen stroma is poor and the extracellular compartment shows large spaces, filled with electron-light material, in which isolated collagen bundles are present. The adipocytes are wrapped in weak and easily detachable collagen baskets. These connective sheaths are very thin compared to the sheaths in other subcutaneous WAT depots. The capillaries are covered by large, long and thin elements surrounded by an external lamina; these perivascular cells are poor in organelles and mainly contain poly-ribosomes. In conclusion, when compared to other WAT deposits, the trochanteric fatty pad shows structural peculiarities in its stroma and microcirculation suggesting a high regenerative potential. Resistance, dissociability, microvascular weft and high regenerative potential make the trochanteric fatty pad a privileged source for harvesting in autologous WAT-based regenerative procedures.

A. Sbarbati

2011-04-01

166

Fat Chuck's Corrupt CDs  

Science.gov (United States)

"Fat Chuck" is here compiling a list of CDs that are designed so that they cannot be played on computerized devices and/or cannot be copied. Users should take the list with a grain of salt, as Chuck himself admits that some titles only have a percentage of their print run affected. The site solicits additions to the list, and there is a .pdf or Word-formatted poster for those who wish to spread the word.

2001-01-01

167

Do we taste fat?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Sense of taste informs the body about the quality of ingested foods. Five sub-modalities allowing the perception of sweet, salty, sour, bitter, and umami stimuli are classically depicted. However, the inborn attraction of mammals for fatty foods raises the possibility of an additional oro-sensory modality devoted to fat perception. During a long time, dietary lipids were thought to be detected only by trigeminal (texture perception), retronasal olfactory, and post-ingestive cues. This minirev...

Laugerette, Fabienne; Gaillard, Dany; Degrace-passilly, Patricia; Niot, Isabelle; Besnard, Philippe

2006-01-01

168

Imaging of pulmonary fat  

International Nuclear Information System (INIS)

Full text: Respiratory complications are common after joint arthroplasty with fat emboli (FE) and thromboembolic disease (TED) being the most serious. FE are minute fat globules which can be demonstrated in circulation following trauma to long bones which contain a mixture of fat and bone marrow elements. Detection of FE in the lungs can distinguish it from other causes of hypoxia and be useful in directing appropriate treatment. An 82-year-old women with no history of TED presented with pleuritic chest pain following total knee arthroplasty. She had a high probability perfusion lung study in conjunction with a positive 99Tcm Phytate study of the lungs. The perfusion and 99Tcm Phytate pulmonary studies successfully identified the presence of FE and TED as the causes of respiratory distress. The patient commenced intravenous heparin and supportive respiratory therapy. A similar study performed two weeks later showed clearance of FE from the lungs and substantial but incomplete resolution of TED. Combined perfusion and 99Tcm Phytate imaging has been shown to be valuable addition for the diagnosis of FE as well as TED in lungs after arthroplasty. Following treatment with heparin, the patient developed bilateral adrenal haemorrhages, which were promptly diagnosed and treated. She was discharged in a well state. Copyright (2000) The Australian and New Zealand Society of Nuclear Medicine Inc

2000-09-01

169

Are the additional grafts necessary?  

Directory of Open Access Journals (Sweden)

Full Text Available The goals of surgery for spinal deformity are to correct or improve the deformity to get a stable, balanced and fused spine. The long-term success of any procedure for scoliosis depends on a solid arthrodesis. Getting fusion of the instrumented segment with the aid of copious autogenous iliac graft has been the most important goal of treatment. However, harvesting copious graft from teenage iliac bone has its limitation in the quantity of graft, surgical time, and other complications of graft sites. Bone substitute is a promising concept, but there is not ideal bone substitute with all the characteristics of an autogenous bone graft. Several alternative graft materials like tricalcium phosphate, hydroxyapatite, and demineralized bone matrix have osteoinductive properties. Bone morphogenic protein has osteoconductive properties. The limitations with bone substitutes are osteoinduction and osteoconduction properties, sterilization, chances of transmitting infective disease and cost. We consider that the introduction of segmental spinal instrumentation which enables strong and firm correction and fixation of the scoliotic deformity has enabled getting fusion with less graft. We can obtain that quantity of graft after laminae and spinous process decortication. This retrospective study has been done in our hospital from January 2002 to December 2004. A total of 188 patients underwent posterior corrections for adolescent idiopathic scoliosis using segmental fixation by Moss-Miami. No autogenous iliac crest graft was taken or graft substitutes. After meticulous decortication and destruction of facet joints, we used local graft taken from spinous process and laminae. All patients had minimum thirty months follow- up. We have excellent results. Out of these 188 patients, 177 patients have fused spine, no implant failure, no pain, no infection and no loss of correction. Eleven (5.8% patients underwent re-operation; four among them because of infection, three for symptomatic implants and four due to pseudarthrosis. We consider that the use of local harvesting graft is enough for getting good spondylodesis.

?ur?i? A.

2010-01-01

170

Environmental application of radiation grafting  

International Nuclear Information System (INIS)

Adsorbent having high selectivity against a certain metal ion was synthesized by means of radiation-induced graft polymerization for the purpose of environmental application. The resulting adsorbents were utilized for the removal of toxic metal from scallop waste and the collection of uranium from seawater. As a novel application of grafting, the biodegradability of poly-hydroxybutylate was controlled by grafting. The biodegradability could be depressed by the graft chain and then recovered by external stimuli such as thermal and chemical treatments. (author)

2007-08-01

171

Autologous fat transplantation in the craniofacial patient: the UCLA experience.  

Science.gov (United States)

Patients with congenital craniofacial malformations present with complex challenges for reconstruction. Successful management requires individualized treatment often involving rebuilding the facial skeleton de novo, as well as correcting the overlying soft-tissue deficiencies in the final stages. At the University of California, Los Angeles (UCLA) Craniofacial Clinic, serial autologous fat transplantation performed during staged reconstruction is the preferred method.A total of 27 patients with a diagnosis of either craniofacial microsomia/Goldenhar (CM) (n = 19) or Treacher Collins syndrome (TC) (n = 8) were treated at the UCLA Craniofacial Clinic by autologous fat transfer between July 1999 and February 2009. Two-dimensional analysis was conducted on standardized preoperative and postoperative photographs to determine facial symmetry for every patient. Results was grouped based on pathology and analyzed by comparing adipocyte donor site (abdomen vs other).The mean ages at the time of first fat transfer were 17 years for the CM group and 15 years for the TC group. The average numbers of fat transfers per patient were 2.05 (CM) and 2.12 (TC). A mean of 3.74 procedures other than fat grafting was performed in each CM patient, whereas 4.38 other procedures were performed in each TC patient. In CM patients, less than 10.5 months between procedures resulted in improved symmetry. There was an average 6.63% improvement in facial symmetry in the CM group, and a 7.67% improvement in the TC group.Based on the UCLA experience, the durability of facial asymmetry and contour correction with fat transplantation is attainable in the craniofacial patient but may also require concomitant skeletal correction in the most severe cases. PMID:22777454

Lim, Alan A; Fan, Kenneth; Allam, Karam A; Wan, Derrick; Tabit, Christina; Liao, Eileen; Kawamoto, Henry K; Bradley, James P

2012-07-01

172

High efficiency deep fat fryer  

Energy Technology Data Exchange (ETDEWEB)

Disclosed is a high efficiency deep-fat fryer from whose fry tank fat is continuously withdrawn for heating and filteration. A pump circulates part of this fat through a helical- or serpentine-shaped finned-tube heat exchanger positioned between a gas-fired burner and the bottom of the fry tank. The remaining portion of fat is directed through a filter located in the bottom zone of the fry tank. The fryer includes a control system with sensors such as pressure switches for preventing damage to the fat at low flow rates and devices for expelling moisture trapped in the pump. The filter has an element of material such as carbon-impregnated cloth which may be quickly replaced without draining fat from the tank. Using the heating systems as described in the invention. The fryer provides a calorimetric efficiency of about 75-80% and flue losses of about 20% or less. 14 figs.

Hurley, J.R.; Shukla, K.C.; Searight, E.F.; Panora, R.A.

1988-01-12

173

The Supersymmetric Fat Higgs  

CERN Document Server

Supersymmetric models have traditionally been assumed to be perturbative up to high scales due to the requirement of calculable unification. In this note I review the recently proposed `Fat Higgs' model which relaxes the requirement of perturbativity. In this framework, an NMSSM-like trilinear coupling becomes strong at some intermediate scale. The NMSSM Higgses are meson composites of an asymptotically-free gauge theory. This allows us to raise the mass of the Higgs, thus alleviating the MSSM of its fine tuning problem. Despite the strong coupling at an intermediate scale, the UV completion allows us to maintain gauge coupling unification.

Harnik, R

2004-01-01

174

The Supersymmetric Fat Higgs  

International Nuclear Information System (INIS)

Supersymmetric models have traditionally been assumed to be perturbative up to high scales due to the requirement of calculable unification. In this note I review the recently proposed 'Fat Higgs' model which relaxes the requirement of perturbativity. In this framework, an NMSSM-like trilinear coupling becomes strong at some intermediate scale. The NMSSM Higgses are meson composites of an asymptotically-free gauge theory. This allows us to raise the mass of the Higgs, thus alleviating the MSSM of its fine tuning problem. Despite the strong coupling at an intermediate scale, the UV completion allows us to maintain gauge coupling unification.

2004-06-17

175

What’s fat activism?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In 21st century Western culture, obesity is such a maligned state of being that the notion of fat activism is unthinkable to most people. "Fat" and "activist" are not words that sit together well in the popular imagination. The idea of activism suggests a dynamic engagement with public life that could not be further from couch potato stereotypes associated with fat people, or popular paradigms which typify "the obese" as innately unwholesome, passive recipients of pity and inte...

Cooper, Charlotte Rachel Mary

2008-01-01

176

Thermal stability of grafted fibers  

International Nuclear Information System (INIS)

Presented the experimental results on the study of thermal stability of grafted fibers, i.e., polypropylene-, polyester-, and rayon-grafted fibers. These fibers were obtained by radiation grafting processes using hydrophylic monomers such as 1-vinyl 2-pyrolidone, acrylic acid, N-methylol acrylamide, and acrylonitrile. The thermal stability of the fibers was studied using a Shimadzu Thermal Analyzer DT-30. The thermal stability of the fibers, which can be indicated by the value of the activation energy for thermal degradation, was not improved by radiation grafting. The degree of improvement depends on the thermal stability of the monomers used for grafting. The thermal stability of a polypropylene fiber, either a grafted or an ungrafted one, was found to be inferior compared to the polyester of a rayon fiber, which may be due to the lack of C=O and C=C bonds in the polypropylene molecules. The thermal stability of a fiber grafted with acrylonitrile monomer was found to be better than that of an ungrafted one. However, no improvement was detected in the fibers grafted with 1-vinyl 2-pyrrolidone monomer, which may be due to the lower thermal stability of poly(1-vinyl-2-pyrrolidone), compared to the polypropylene or polyester fibers. 17 figures, 3 tables

1983-01-01

177

Polyether/Polyester Graft Copolymers  

Science.gov (United States)

Higher solvent resistance achieved along with lower melting temperature. New technique provides method of preparing copolymers with polypivalolactone segments grafted onto poly (2,6-dimethyl-phenylene oxide) backbone. Process makes strong materials with improved solvent resistance and crystalline, thermally-reversible crosslinks. Resulting graft copolymers easier to fabricate into useful articles, including thin films, sheets, fibers, foams, laminates, and moldings.

Bell, Vernon L., Jr.; Wakelyn, N.; Stoakley, D. M.; Proctor, K. M.

1986-01-01

178

Asymptotic behavior of grafting rays  

CERN Document Server

In this paper we study the convergence behavior of grafting rays to the Thurston boundary of Teichmuller space. When the grafting is done along a weighted system of simple closed curves or along a maximal uniquely ergodic lamination this behavior is the same as for Teichmuller geodesics and lines of minima. We also show that these rays are at bounded distance from Teichmuller geodesics.

Diaz, Raquel

2007-01-01

179

Transiliac hernia after bone graft.  

Science.gov (United States)

Lumbar hernias, namely transiliac hernias, are not frequent events and are almost always associated with bone graft harvesting from the iliac crest. We describe a case of transiliac hernia 10 years after bone graft harvest, the patient presenting with right colon incarceration. Diagnosis was made by CT scan. The hernia was repaired with a composite polypropylene-PTFE mesh (Bard(®)). PMID:24269126

Kunin, N; Gancel, C-H; Foret, A; Gayet, C; Letoquart, J-P; Daaboul, M

2013-12-01

180

Coxiella burnetii vascular graft infection  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Coxiella burnetii, the causative agent of Q fever, may cause culture-negative vascular graft infections. Very few cases of C. burnetii infection of a vascular graft have been reported. All were diagnosed by serology. Case presentation We report the first case of Coxiella burnetii vascular graft infection diagnosed by broad-range PCR and discuss the diagnostic approaches and treatment strategies of chronic C. burnetii infection. Conclusion C. burnetii should be considered as etiological agent in patients with a vascular graft and fever, abdominal pain, and laboratory signs of inflammation, with or without exposure history. Broad-range PCR should be performed on culture-negative surgical samples in patients with suspected infection of vascular graft.

Von Segesser Ludwig

2005-12-01

 
 
 
 
181

Radiation grafting on natural films  

Science.gov (United States)

Different methods of polymer grafting using gamma irradiation are reported in the present study for the preparation of newly functionalized biodegradable films, and some important properties related to their mechanical and barrier properties are described. Biodegradable films composed of zein and poly(vinyl alcohol) (PVA) were gamma-irradiated in presence of different ratios of acrylic acid (AAc) monomer for compatibilization purpose. Resulting grafted films (zein/PVA-g-AAc) had their puncture strength (PS=37-40 N mm-1) and puncture deformation (PD=6.5-9.8 mm) improved for 30% and 50% PVA in blend, with 5% AAc under 20 kGy. Methylcellulose (MC)-based films were irradiated in the presence of 2-hydroxyethyl methacrylate (HEMA) or silane, in order to determine the effect of monomer grafting on the mechanical properties of films. It was found that grafted films (MC-g-HEMA and MC-g-silane) using 35% monomer performed higher mechanical properties with PS values of 282-296 N mm-1 and PD of 5.0-5.5 mm under 10 kGy. Compatibilized polycaprolactone (PCL)/chitosan composites were developed via grafting silane in chitosan films. Resulting trilayer grafted composite film (PCL/chitosan-g-silane/PCL) presented superior tensile strength (TS=22 MPa) via possible improvement of interfacial adhesion (PCL/chitosan) when using 25% silane under 10 kGy. Finally, MC-based films containing crystalline nanocellulose (CNC) as a filling agent were prepared and irradiated in presence of trimethylolpropane trimethacrylate (TMPTMA) as a grafted plasticizer. Grafted films (MC-g-TMPTMA) presented superior mechanical properties with a TS of 47.9 MPa and a tensile modulus (TM) of 1792 MPa, possibly due to high yield formation of radicals to promote TMPTMA grafting during irradiation. The addition of CNC led to an additional improvement of the barrier properties, with a significant 25% reduction of water vapor permeability (WVP) of grafted films.

Lacroix, M.; Khan, R.; Senna, M.; Sharmin, N.; Salmieri, S.; Safrany, A.

2014-01-01

182

Autologous bone-marrow-derived-mononuclear-cells-enriched fat transplantation in breast augmentation: evaluation of clinical outcomes and aesthetic results in a 30-year-old female.  

Science.gov (United States)

Autologous fat transfer (lipofilling) is becoming an invaluable tool for breast augmentation as well as for breast reconstruction. Autologous lipofilling has several advantages, including biocompatibility, versatility, natural appearance, and low donor site morbidity. The main limitation is unpredictable fat graft resorption, which ranges from 25% to 80%, probably as a result of ischaemia and lack of neoangiogenesis. To obviate these disadvantages, several studies have searched for new ways of increasing the viability of the transplanted fat tissue. One promising approach is to enrich the fat graft with autologous bone-marrow-derived mononuclear cells (BMMNCs) before transplantation. BMMNCs produce many angiogenic and antiapoptotic growth factors, and their secretion is significantly enhanced by hypoxia. All of these mechanisms of actions could be beneficial for the stimulation of angiogenesis in ischemic tissues by BMMNCs administration. In our aesthetic surgery practice, we use fat transplantation enriched with BMMNCs, which caused a significant improvement in survival of fat grafts, compared with that of traditional lipofilling. Our experience with freshly isolated autologous fat enriched with BMMNCs for breast augmentation procedures is presented. The concept of this surgical and tissue handling technique is based on ability of BMMNCs to stimulate blood vessel growth. PMID:24024064

Bulgin, Dmitry; Vrabic, Erik; Hodzic, Enes

2013-01-01

183

Radiation-Induced Grafting on Polyamides.  

Science.gov (United States)

Earlier work indicated that in the radiation-induced grafting of vinyl monomers on polymeric films, the plasticity of the film being grafted is determined by the Hildebrand solubility parameter of the grafting solution. In the grafting of styrene on nylon...

J. E. Wilson

1973-01-01

184

Fat Brane Phenomena  

CERN Multimedia

Gravitons could permeate extra space dimensions inaccessible to all other particles, which would be confined to ``branes''. We point out that these branes could be ``fat'' and have a non-vanishing width in the dimensions reserved for gravitons. In this case the other particles, confined within a finite width, should have ``branon'' excitations. Chiral fermions behave differently from bosons under dimensional reduction, and they may --or may not-- be more localized than bosons. All these possibilities are in principle testable and distinguishable, they could yield spectacular signatures at colliders, such as the production of the first branon excitation of $\\gamma$'s or $Z$'s, decaying into their ground state plus a quasi-continuum of graviton recurrences. We explore these ideas in the realm of a future lepton collider and we individuate a {\\it dimensiometer}: an observable that would cleanly diagnose the number of large ``extra'' dimensions.

De Rújula, Alvaro; Gavela-Legazpi, Maria Belen; Rigolin, Stefano

2000-01-01

185

Frustration with Fat Graphs  

CERN Multimedia

We consider the effect of geometric frustration induced by the random distribution of loop lengths in the "fat" graphs of the dynamical triangulations model on coupled antiferromagnets. While the influence of such connectivity disorder is rather mild for ferromagnets in that an ordered phase persists and only the properties of the phase transition are substantially changed in some cases, any finite-temperature transition is wiped out due to frustration for some of the antiferromagnetic models. A wealth of different phenomena is observed: while for the annealed average of quantum gravity some graphs can adapt dynamically to allow the emergence of a Neel ordered phase, this is not possible for the quenched average, where a zero-temperature spin-glass phase appears instead. We relate the latter to the behaviour of conventional spin-glass models coupled to random graphs.

Weigel, M; Weigel, Martin; Johnston, Des

2007-01-01

186

A Reappraisal of Saphenous Vein Grafting  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Autologous saphenous vein grafting has been broadly used as a bypass conduit, interposition graft, and patch graft in a variety of operations in cardiac, thoracic, neurovascular, general vascular, vascular access, and urology surgeries, since they are superior to prosthetic veins. Modified saphenous vein grafts (SVG), including spiral and cylindrical grafts, and vein cuffs or patches, are employed in vascular revascularization to satisfy the large size of the receipt vessels or to obtain a be...

2011-01-01

187

Coronary vein graft disease: Pathogenesis and prevention  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Not long after coronary artery bypass grafting surgery was described, several reports presented follow-up angiographic data on large cohorts of patients, demonstrating that approximately one-half of saphenous vein grafts fail within 10 to 15 years of surgery and that graft failure is associated with worse clinical outcomes. Three processes are responsible for vein graft failure. Thrombosis, intimal hyperplasia and accelerated atherosclerosis contribute to graft failure in the acute, subacute ...

2009-01-01

188

A reappraisal of saphenous vein grafting  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Autologous saphenous vein grafting has been broadly used as a bypass conduit, interposition graft, and patch graft in a variety of operations in cardiac, thoracic, neurovascular, general vascular, vascular access, and urology surgeries, since they are superior to prosthetic veins. Modified saphenous vein grafts (SVG), including spiral and cylindrical grafts, and vein cuffs or patches, are employed in vascular revascularization to satisfy the large size of the receipt vessels or to obtain a be...

2011-01-01

189

Mesenchymal stromal cells : a new tool against graft-versus-host disease ?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Mesenchymal stromal cells (MSCs) represent a heterogeneous subset of multipotent cells that can be isolated from several tissues including bone marrow and fat. MSCs exhibit immunomodulatory and anti-inflammatory properties that prompted their clinical use as prevention and/or treatment for severe graft-versus-host disease (GVHD). Although a number of phase I-II studies have suggested that MSCs infusion was safe and might be effective for preventing or treating acute GVHD, definitive proof for...

2012-01-01

190

MENSENCHYMAL STROMAL CELLS: A NEW TOOL AGAINST GRAFT-VERSUS-HOST DISEASE?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Mesenchymal stromal cells (MSCs) represent a heterogeneous subset of multipotent cells that can be isolated from several tissues including bone marrow and fat. MSCs exhibit immunomodulatory and anti-inflammatory properties that prompted their clinical use as prevention and/or treatment for severe graft-versus-host disease (GVHD). While a number of phase I-II studies have suggested that MSCs infusion was safe and might be effective for preventing or treating acute GVHD, definitive proof for th...

2012-01-01

191

Tissue Engineering Applications to Vascular Bypass Graft Development: The Use of Adipose-Derived Stem Cells  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The burgeoning field of vascular tissue engineering holds promise for the creation of a practical and successful small-diameter arterial bypass graft. Many creative combinations of autologous cells and scaffolds exist along with an equally long list of microenvironmental cues used to create a functional arterial conduit. This review outlines our work using abdominal wall fat as a source of autologous stem cells for vascular tissue engineering, focusing specifically on this stem cell’s avail...

2007-01-01

192

Study on remodelling of bone grafts  

International Nuclear Information System (INIS)

The remodelling of bone grafts depends to a large extent upon the type of graft and the condition of the recipient site. We applied sup(99m)Tc-phosphate scintigraphy in a follow-up study on cases treated by bone grafting, and quantitative analysis of the scintigram by computer to make clear the difference of remodelling time or the process of acceptance between a cancellous and a cortical bone grafting or due to various graft and conditions. The result revealed that the grafted bones which were smoothly adapted for subsequent growths or functions could restore normal accumulation ratios by 36 months after the grafting. When the cancellous bone was grafted to grafting beds with good conditions such as osteotomy site in the cases with coxarthrosis deformans or congenital dislocation of the hip, it could attain the quickest recovery of the normal accumulation ratio. The next quickest recovery of accumulation ratio was attained by grafting the cancellous bone to the grafting beds with poor conditions such as osteomyelitis, pseudoarthrosis, and bone tumor. The third best accumulation ratio could be attained when the cortical bone was grafted to grafting beds with good conditions, while the slowest recovery to normal accumulation ratio was noted when the cortical bone was grafted to grafting beds with poor conditions. (author)

1979-01-01

193

FAS grafted superhydrophobic ceramic membrane  

International Nuclear Information System (INIS)

The hydrophobic properties of ?-Al2O3 membrane have been obtained by grafting fluoroalkylsilane (FAS) on the surface of the membrane. The following grafting parameters were studied: the eroding time of the original membrane, the grafting time, the concentration of FAS solution and the multiplicity of grafting. Hydrophobicity of the membranes was characterized by contact angle (CA) measurement. The thermogravimetric analysis (TGA) was used to investigate the weight loss process (25-800 deg. C) of the fluoroalkylsilane grafted on Al2O3 powders under different grafting conditions. The morphologies of the membranes modified under different parameters were examined by field emission scanning electron microscopy (FE-SEM) and the surface roughness (Ra) was measured using white light interferometers. A needle-like structure was observed on the membrane surface after modification, which causes the change of Ra. On the results above, we speculated a model to describe the reaction between FAS and ?-Al2O3 membrane surface as well as the formed surface morphology.

2009-08-30

194

FAS grafted superhydrophobic ceramic membrane  

Science.gov (United States)

The hydrophobic properties of ?-Al 2O 3 membrane have been obtained by grafting fluoroalkylsilane (FAS) on the surface of the membrane. The following grafting parameters were studied: the eroding time of the original membrane, the grafting time, the concentration of FAS solution and the multiplicity of grafting. Hydrophobicity of the membranes was characterized by contact angle (CA) measurement. The thermogravimetric analysis (TGA) was used to investigate the weight loss process (25-800 °C) of the fluoroalkylsilane grafted on Al 2O 3 powders under different grafting conditions. The morphologies of the membranes modified under different parameters were examined by field emission scanning electron microscopy (FE-SEM) and the surface roughness (Ra) was measured using white light interferometers. A needle-like structure was observed on the membrane surface after modification, which causes the change of Ra. On the results above, we speculated a model to describe the reaction between FAS and ?-Al 2O 3 membrane surface as well as the formed surface morphology.

Lu, Jun; Yu, Yun; Zhou, Jianer; Song, Lixin; Hu, Xingfang; Larbot, Andre

2009-08-01

195

Interventions in Infrainguinal Bypass Grafts  

International Nuclear Information System (INIS)

The interventional radiologist plays an important role in the detection and prevention of infrainguinal bypass failure. Early detection and evaluation of flow-limiting lesions effectively preserve graft (venous bypass and polyester or expanded polytetrafluoroethylene bypass) patency by identifying stenoses before occlusion occurs. Delay in treatment of the at-risk graft may result in graft failure and a reduced chance of successful revascularization. For this reason, surveillance protocols form an important part of follow-up after infrainguinal bypass surgery. As well as having an understanding of the application of imaging techniques including ultrasound, MR angiography, CT angiography and digital subtraction angiography, the interventional radiologist should have detailed knowledge of the minimally invasive therapeutic options. Percutaneous transluminal angioplasty (PTA), or alternatively cutting balloon angioplasty, is the interventional treatment of choice in prevention of graft failure and occlusion. Further alternatives include metallic stent placement, fibrinolysis, and mechanical thrombectomy. Primary assisted patency rates following PTA can be up to 65% at 5 years. When the endovascular approach is unsuccessful, these therapeutic options are complemented by surgical procedures including vein patch revision, jump grafting, or placement of a new graft

2006-02-01

196

Estimates of beef carcass intermuscular fat.  

Science.gov (United States)

Three experienced persons evaluated 158 carcasses 24 h postmortem for USDA yield grade (YG) and quality grade factors, nine subcutaneous (SC) fat indicators, and four intermuscular (IM) fat indicators. Forty sides (YG 1.1 to 3.8) were selected for determination of chemical composition, two measures of cutability, and total IM fat from the round, loin, rib, and chuck. The IM fat estimates at the 12th rib, rib-plate juncture, and 5th rib were correlated with percentage of chemical fat (r = -.72, -.70, and -.55, respectively). Simultaneous consideration of YG factors accounted for 61% of the variation in chemical fat. Substituting the IM fat estimate at the 12th rib for adjusted fat thickness (AFT) in the equation explained 60% of the variation in percentage of chemical fat. An equation containing two IM fat estimates, marbling score and longissimus muscle area explained 68% of the variation in chemical fat. Simultaneous consideration of the YG factors accounted for 59% of the variation in boneless, closely trimmed (6 mm SC fat and no IM fat) retail cuts from the round, loin, rib, and chuck. Substituting the IM fat estimate at the 12th rib for AFT in the equation accounted for 65% of the variation. These data from a fairly uniform set of steer carcasses show that percentage of chemical fat and cutability can be reliably predicted from IM fat estimates and other traits that can be visually estimated on hot-fat trimmed carcasses. PMID:1808178

Kent, K R; Davis, G W; Ramsey, C B; Schluter, A R

1991-12-01

197

Body fat, abdominal fat and body fat distribution related to VO(2PEAK) in young children  

DEFF Research Database (Denmark)

Abstract Objective. Aerobic fitness, defined as maximum oxygen uptake (VO(2PEAK)), and body fat measurements represent two known risk factors for disease. The purpose of this study was to investigate the relationship between VO(2PEAK) and body fat measurements in young children at a population-based level. Methods. Cross-sectional study of 225 children (128 boys and 97 girls) aged 8-11 years, recruited from a population-based cohort. Total lean body mass (LBM), total fat mass (TBF), and abdominal fat mass (AFM) were measured by dual-energy x-ray absorptiometry. Body fat was also calculated as a percentage of body mass (BF%) and body fat distribution as AFM/TBF. VO(2PEAK) was assessed by indirect calorimetry during maximal exercise test. Results. Significant relationships existed between body fat measurements and VO(2PEAK) in both boys and girls, with Pearson correlation coefficients for absolute values of VO(2PEAK) (0.22-0.36, P<0.05), and for VO(2PEAK) scaled by body mass (-0.38 - -0.70, P

Andersen, Lars Bo

2011-01-01

198

Fat Fisher Zeroes  

CERN Multimedia

We show that it is possible to determine the locus of Fisher zeroes in the thermodynamic limit for the Ising model on planar (``fat'') phi4 random graphs and their dual quadrangulations by matching up the real part of the high and low temperature branches of the expression for the free energy. The form of this expression for the free energy also means that series expansion results for the zeroes may be obtained with rather less effort than might appear necessary at first sight by simply reverting the series expansion of a function g(z) which appears in the solution and taking a logarithm. Unlike regular 2D lattices where numerous unphysical critical points exist with non-standard exponents, the Ising model on planar phi4 graphs displays only the physical transition at c = exp (- 2 beta) = 1/4 and a mirror transition at c=-1/4 both with KPZ/DDK exponents (alpha = -1, beta = 1/2, gamma = 2). The relation between the phi4 locus and that of the dual quadrangulations is akin to that between the (regular) triangula...

Janke, W; Stathakopoulos, M

2001-01-01

199

Patency of femoropopliteal and femorotibial grafts after outflow revascularization (jump grafts) to bypass distal disease.  

Science.gov (United States)

Repair of failing femorodistal bypass grafts with secondary distal "jump" grafts was performed 34 times in 33 patients. Indication for operation was limb salvage for all distal jump grafts and for 85% of the initial femorodistal bypass grafts. Autogenous vein bypass grafts were used in 28 of 33 initial femorodistal grafts (85%) and in 29 of 34 secondary jump grafts (85%). Sixteen of the 33 initial grafts in jeopardy extended to the infrapopliteal level (48%) and 19 of the jump grafts terminated in foot or ankle arteries (56%). The 12 jump grafts performed in the first 2 months of the initial graft were associated with high rates (9%) of graft thrombosis and amputation. Early loss of viability of initial grafts probably resulted from technical and judgment errors or underestimation of distal disease. Progression of distal disease produced late failure after 1 year of implantation of the initial grafts. The 1-year patency rate of the initial femorodistal grafts was 63% but only 32% of these grafted limbs were viable and were not at risk of amputation. Distal jump grafts produced a 49% improvement in limb viability (to an 81% limb salvage rate) and an 11% increase in the initial graft patency rate (to 74%) at 1 year. PMID:6495176

Andros, G; Harris, R W; Dulawa, L B; Oblath, R W; Salles-Cunha, S X

1984-11-01

200

Upgrading redo coronary artery bypass graft by recycling in situ arterial graft.  

Science.gov (United States)

We present a case of redo coronary artery bypass grafting (CABG) in which a single internal thoracic artery (ITA) graft was upgraded to a bilateral ITA graft by recycling a left ITA graft, anastomosed to the left anterior descending artery in primary CABG performed 17 years previously. During redo CABG, we dissected the left ITA, reused it in situ for the circumflex artery, and used the right ITA to the left anterior descending artery for a bilateral ITA graft. All grafts remained patent 2 years after redo CABG. Recycling ITA grafts may enable upgrading to bilateral ITA grafting during redo CABG. PMID:24996709

Dohi, Masahiro; Doi, Kiyoshi; Okawa, Kazunari; Yaku, Hitoshi

2014-07-01

 
 
 
 
201

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... than saturated fats. But now a broad new review of past research published in the Annals of ... significantly reduces the risk for cardiovascular disease. The review similarly failed to unearth proof for the other ...

202

Fat Replacers in Meat Products  

Digital Repository Infrastructure Vision for European Research (DRIVER)

There is a great interest regarding demand for foods with health enhancing properties as low-fat meat products due to the human health and nutrition correlation. Various aspects of interest relating to product design and fat reducing strategy has been reported. These aspects concerning nutritional, sensory, technological, safety, appreciation, legal and cost procedures are important to a improved new product design. Due to their different texture properties, processing conditions and differen...

Ozlem Tokusoglu; Kemal Unal, M.

2003-01-01

203

Fat in the dural sinus  

International Nuclear Information System (INIS)

Fat density in the dural sinus on computed tomography (CT) is described in eight cases. Of the eight cases, five had fat deposit in the torcular Herophili, and three in the superior sagittal sinus. This finding was incidentally found by CT and there was no common underlying disease in these cases. It is suggested that this finding represents normal adipose tissue in the dural sinus. (orig.)

1986-01-01

204

Fat in the dural sinus  

Energy Technology Data Exchange (ETDEWEB)

Fat density in the dural sinus on computed tomography (CT) is described in eight cases. Of the eight cases, five had fat deposit in the torcular Herophili, and three in the superior sagittal sinus. This finding was incidentally found by CT and there was no common underlying disease in these cases. It is suggested that this finding represents normal adipose tissue in the dural sinus.

Tokiguchi, S.; Ando, K.; Tsuchiya, T.; Ito, J.

1986-05-01

205

Autologous Fat Injection for Augmented Mammoplasty  

International Nuclear Information System (INIS)

Autologous fat injection is one of the methods utilized for augmented mammoplasty methods. In this surgical procedure, the fat for transfer is obtained from the donor site of the patient's own body by liposuction and the fat is then injected into the breast. We report here cases of three patients who underwent autologous fat injection. Two of the patients had palpable masses that were present after surgery. The serial imaging findings and surgical method of autologous fat transfer are demonstrated

2008-12-01

206

Adult Epicardial Fat Exhibits Beige Features  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Context: Human epicardial fat has been designated previously as brown-like fat. The supraclavicular fat depot in man has been defined as beige coexistent with classical brown based on its gene expression profile. Objective: The aim of the study was to establish the gene expression profile and morphology of human epicardial and visceral paracardial fat compared with sc fat. Setting: The study was conducted at a tertiary care hospital cardiac center. Patients: Epicardial, visceral paracardial, ...

Sacks, Harold S.; Fain, John N.; Bahouth, Suleiman W.; Ojha, Shalini; Frontini, Andrea; Budge, Helen; Cinti, Saverio; Symonds, Michael E.

2013-01-01

207

Autologous Fat Injection for Augmented Mammoplasty  

Energy Technology Data Exchange (ETDEWEB)

Autologous fat injection is one of the methods utilized for augmented mammoplasty methods. In this surgical procedure, the fat for transfer is obtained from the donor site of the patient's own body by liposuction and the fat is then injected into the breast. We report here cases of three patients who underwent autologous fat injection. Two of the patients had palpable masses that were present after surgery. The serial imaging findings and surgical method of autologous fat transfer are demonstrated

Yoon, Eul Sik; Seo, Bo Kyoung; Yi, Ann; Cho, Kyu Ran [Korea University Ansan Hospital, Ansan (Korea, Republic of)

2008-12-15

208

Causes of corneal graft failure in India  

Directory of Open Access Journals (Sweden)

Full Text Available The success of corneal grafting in visual rehabilitation of the corneal blind in India depends on survival of the grafts. Understanding the causes of graft failure may help reduce the risk of failure. We studied these causes in a series of 638 graft failures at our institution. Multivariate logistic regression analysis was used to evaluate the association of particular causes of graft failure with indications for grafting, socioeconomic status, age, sex, host corneal vascularization, donor corneal quality, and experience of surgeon. The major causes of graft failure were allograft rejection (29.2%, increased intraocular pressure (16.9%, infection excluding endophthalmitis (15.4%, and surface problems (12.7%. The odds of infection causing graft failure were significantly higher in patients of lower socioeconomic status (odds ratio 2.45, 95% CI 1.45-4.15. Surface problems as a cause of graft failure was significantly associated with grafts done for corneal scarring or for regrafts (odds ratio 3.36, 95% CI 1.80-6.30. Increased intraocular pressure as a cause of graft failure had significant association with grafts done for aphakic or pseudophakic bullous keratopathy, congenital conditions or glaucoma, or regrafts (odds ratio 2.19, 95% CI 1.25-3.84. Corneal dystrophy was the indication for grafting in 12 of the 13 cases of graft failure due to recurrence of host disease. Surface problems, increased intraocular pressure, and infection are modifiable risk factors that are more likely to cause graft failure in certain categories of patients in India. Knowledge about these associations can be helpful in looking for and aggressively treating these modifiable risk factors in the at-risk categories of corneal graft patients. This can possibly reduce the chance of graft failure.

Dandona Lalit

1998-01-01

209

The genetics of fat distribution.  

Science.gov (United States)

Fat stored in visceral depots makes obese individuals more prone to complications than subcutaneous fat. There is good evidence that body fat distribution (FD) is controlled by genetic factors. WHR, a surrogate measure of FD, shows significant heritability of up to ?60%, even after adjusting for BMI. Genetic variants have been linked to various forms of altered FD such as lipodystrophies; however, the polygenic background of visceral obesity has only been sparsely investigated in the past. Recent genome-wide association studies (GWAS) for measures of FD revealed numerous loci harbouring genes potentially regulating FD. In addition, genes with fat depot-specific expression patterns (in particular subcutaneous vs visceral adipose tissue) provide plausible candidate genes involved in the regulation of FD. Many of these genes are differentially expressed in various fat compartments and correlate with obesity-related traits, thus further supporting their role as potential mediators of metabolic alterations associated with a distinct FD. Finally, developmental genes may at a very early stage determine specific FD in later life. Indeed, genes such as TBX15 not only manifest differential expression in various fat depots, but also correlate with obesity and related traits. Moreover, recent GWAS identified several polymorphisms in developmental genes (including TBX15, HOXC13, RSPO3 and CPEB4) strongly associated with FD. More accurate methods, including cardiometabolic imaging, for assessment of FD are needed to promote our understanding in this field, where the main focus is now to unravel the yet unknown biological function of these novel 'fat distribution genes'. PMID:24632736

Schleinitz, Dorit; Böttcher, Yvonne; Blüher, Matthias; Kovacs, Peter

2014-07-01

210

Evolution of complete arterial grafting. For coronary artery disease.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Arterial grafting for the correction of coronary artery disease preceded the use of saphenous vein grafts, but the overwhelming popularity of the saphenous vein from 1970 to 1985 left the development of arterial grafting dormant. Excellent graft patency results from pedicled internal thoracic artery grafting and continued saphenous vein graft failure prompted our unit to explore complete arterial grafting with internal thoracic artery and radial artery grafts. One thousand and fifty-three pat...

1998-01-01

211

Vascularized osseous graft for scaphoid  

International Nuclear Information System (INIS)

The most commonly used technique for treatment of pseudo-arthrosis of the scaphoid is osteo-synthesis with Kirschnet wires and cortical sponge grafts. Results reported by different teams using this procedure show no more than 90% osseous consolidation, especially in cases where vascularisation of the proximal fragment of the scaphoid is compromised. Here we present a series of ten cases of pseudo-arthrosis of the scaphoid, treated using a new surgical technique involving a vascularized osseous graft of the distal radius. Using this procedure we obtained 100% consolidation, with no complications either during the procedure or immediately post-operatively. Patients returned to work in week 15 on average. In 4 cases we observed discomfort in the area of the scar, which was successfully treated using local cortisone injection. The results obtained are very similar to those seen in the literature on the different techniques for vascularized osseous grafts for pseudo-arthrosis of the scaphoid

2004-12-01

212

Molecular grafting on semiconductor surfaces  

Energy Technology Data Exchange (ETDEWEB)

Molecular grafting on semiconductors is generally performed by reacting molecules with an oxide layer on top of the material. Direct grafting on the surface is less common and raises some difficulties and fundamental questions, by comparison with metallic surfaces. A semiconductor is indeed terminated with foreign ligands which are covalently attached to the surface and must be replaced by the molecule of interest. One of the problem is that the process may lead to some surface dissolution. We have considered two systems. The first one is the chemical formation of thiol monolayers on GaAs. The second is the cathodic formation of a monolayer of nitrophenyl groups on an ideally flat H-(1x1) Si(111) surface. Chemical characterizations assessing molecular grafting will be presented as well as STM/AFM images showing that ordered layers can be obtained. Electrical characterizations will be also presented.

Allongue, P.; Villeneuve, C.H. de [Universite P. & M., Paris (France)

1996-10-01

213

Postoperative radiographic evaluation of vascularized fibular grafts  

International Nuclear Information System (INIS)

This paper reports on thirty-five patients with free vascularized fibular grafts examined postoperatively with plain radiography. Early graft incorporation is seen as a fuzziness of the cortex at the site of its insertion into the host bone. Causes of failure in grafting for bone defects include graft fracture, hardware failure, and infection. A high percentage of complications or at least delayed unions occurred when vascularized fibular grafts were used to fill defects in the lower extremity. Conversely, upper extremity defects bridged by vascularized grafts heal quickly and hypertrophy. Vascularized grafts placed in the femoral head and neck for a vascular necrosis incorporate early on their superior aspect. The osseous tunnel in which they are placed is normally wider than the graft and often becomes sclerotic; this appearance does not represent nonunion

1989-12-01

214

FAT TISSUE DISTRIBUTION BETWEEN SUBCUTANEOUS AND INTERMUSCULAR FAT TISSUE IN SIMMENTAL AND BROWN BULLS  

Directory of Open Access Journals (Sweden)

Full Text Available Simmental and Brown bulls from progeny testing station were used to evaluate the effect of breed on fat tissue partition between subcutaneous and intermuscular fat. Bulls (37 Brown and 34 Simmental breed were slaughtered at the same degree of fatness. After slaughter carcasses were first cut into different carcass cuts and further on into lean meat, fat, bones and tendons. Fat was divided up into subcutaneous and intermuscular. Simmental bulls were heavier (average cold carcass side weight from Simmental bulls was 167 kg vs 147 kg from Brown bulls at the same percentage of total carcass fat (10.5 %. Breed has no effect on percentage of subcutaneous and intermuscular fat tissue nor on percentage of subcutaneous fat from total carcass fat. Simmental bulls had higher (p<0.05 subcutaneous fat percentage (subcutaneous fat in the cut /total fat in the cut in brisket and flank and lower (p<0.05 in shoulder than Brown bulls.

Silvester Žgur

2007-06-01

215

Sources of Saturated Fat, Stearic Acid, & Cholesterol Raising Fat among the US Population, 2005–06  

Science.gov (United States)

The purpose of this research was to identify the contributions of specific foods to intake of saturated fat, stearic acid, and "cholesterol raising fat" (defined as saturated fat minus stearic acid) in the US population age 2 years and older.

216

Occlusion of a Rapidly Expanding Hemodialysis Graft Pseudoaneurysm with Placement of a Stent Graft  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We describe a 44-year-old man with end-stage renal disease who underwent insertion of a stent graft to repair a hemodialysis graft pseudoaneurysm. The indication for stent graft placement was an acute and rapidly enlarging intragraft pseudoaneurysm. The patient experienced no complications following the procedure, but he presented with two graft occlusions within the 2 months following the procedure.

Moszkowicz, Arie; Behrens, George; Gueyikian, Sebouh; Patel, Nilesh H.; Ferral, Hector

2007-01-01

217

Industrial applications of radiation grafting  

International Nuclear Information System (INIS)

Radiation grafting can introduce the aiming function to the trunk polymer. This technique gave the separator membrane for a button-shaped battery and the gas adsorbent for fabrication facility as commercial products. This commercialization was realized by the excellent properties which were imparted by graft polymerization into the trunk polymer. As ongoing R and D, the fibrous adsorbent has been synthesized by using fibrous trunk polymer. The metal ion adsorbent is promising materials for removal of toxic metals and the recovery of significant metals from the point of environmental preservation view. (author)

2008-12-01

218

[Radioindication of bone graft healing].  

Science.gov (United States)

To control the state of transplanted bone in different terms following the plastic procedure a radioisotope study by strontium-85 was performed in 29 patients. The results of scannography (in 31 cases) and radiometry (in 42 cases) were analysed. The determination of the character of strontium-85 distribution and the intensity of its accumulation in the operated extremity makes it possible to assess the graft condition and the intensity of osteogenesis a greater precision and earlier than does roentgenography. Radioisotope investigation conducted dynamically enable the prognostication of the course of the graft healing process. PMID:333749

Kuznetsova, L B; Pavlova, L P; Kondrat'ev, V G; Khmelev, O N

1977-01-01

219

Graft healing in anterior cruciate ligament reconstruction  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Successful anterior cruciate ligament reconstruction with a tendon graft necessitates solid healing of the tendon graft in the bone tunnel. Improvement of graft healing to bone is crucial for facilitating an early and aggressive rehabilitation and ensuring rapid return to pre-injury levels activity. Tendon graft healing in a bone tunnel requires bone ingrowth into the tendon. Indirect Sharpey fiber formation and direct fibrocartilage fixation confer different anchorage strength and interface ...

2009-01-01

220

Graft healing in anterior cruciate ligament reconstruction  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Abstract Successful anterior cruciate ligament reconstruction with a tendon graft necessitates solid healing of the tendon graft in the bone tunnel. Improvement of graft healing to bone is crucial for facilitating an early and aggressive rehabilitation and ensuring rapid return to pre-injury levels activity. Tendon graft healing in a bone tunnel requires bone ingrowth into the tendon. Indirect Sharpey fiber formation and direct fibrocartilage fixation confer different anchorage stre...

2009-01-01

 
 
 
 
221

Mouse Model of Venous Bypass Graft Arteriosclerosis  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Saphenous vein grafts are widely used for treatment of severe atherosclerosis via aortocoronary bypass surgery, a procedure often complicated by later occlusion of the graft vessel. Because the molecular mechanisms of this process remain largely unknown, quantitative models of venous bypass graft arteriosclerosis in transgenic mice could be useful to study this process at the genetic level. We describe herein a new model of vein grafts in the mouse that allows us to take advantage of transgen...

Zou, Yiping; Dietrich, Hermann; Hu, Yanhua; Metzler, Bernhard; Wick, Georg; Xu, Qingbo

1998-01-01

222

Grafting rays fellow travel Teichmuller geodesics  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Given a measured geodesic lamination on a hyperbolic surface, grafting the surface along multiples of the lamination defines a path in Teichmuller space, called the grafting ray. We show that every grafting ray, after reparametrization, is a Teichmuller quasi-geodesic and stays in a bounded neighborhood of a Teichmuller geodesic. As part of our approach, we show that grafting rays have controlled dependence on the starting point. That is, for any measured geodesic laminati...

Choi, Young-eun; Dumas, David; Rafi, Kasra

2010-01-01

223

A new femoral bypass graft catheter.  

Science.gov (United States)

A three-dimensional left coronary bypass graft catheter with a sidewinder configuration is described. It is best suited for superior origins of left coronary bypass grafts. This graft catheter has been used successfully from the femoral route in more than 620 patients without serious complications. The method for using this catheter from the femoral route is described. PMID:3879196

Simmons, C R; Willis, W H

1985-01-01

224

Sodium and chloride exclusion and retention by non-grafted and grafted melon and Cucurbita plants  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The effects of grafting on Na and Cl– uptake and distribution in plant tissues were quantified in a greenhouse experiment using six combinations of melon (Cucumis melo L. cv. Arava) and pumpkin (Cucurbita maxima Duchesne×Cucurbita moschata Duchesne cv. TZ-148): non-grafted, self-grafted, melons grafted on pumpkins, and pumpkins grafted on melons. Total Na concentration in shoots of plants with pumpkin or melon rootstocks was 400?mmol kg?1, respectively, regardles...

Edelstein, M.; Plaut, Z.; Ben-hur, M.

2011-01-01

225

Influence of grafting initiation rate on properties of radiation-graft films and fibers  

International Nuclear Information System (INIS)

Acrylonitrile graft polymerization on polyethylene films, fibers and chlorinated polyvinyl chloride films is studied initiated by ?-radiation of 60Co and accelerated electrons. Vapor permeability, mechanical properties and solvent-influence resistance of radiation-graft films and fibers depend not only on the quantity of graft polymer but also on dose rate at which grafting is proceeded. The results obtained are explained by different character of the graft polymer distribution

1979-04-01

226

[Renal ultrasound in fat necrosis].  

Science.gov (United States)

Subcutaneous fat necrosis is an uncommon disease that may be complicated with potentially fatal hypercalcemia or with nephrocalcinosis. We report on the case of a patient with a history of significant perinatal asphyxia, hospitalized for a urinary tract infection. Lesions of subcutaneous fat necrosis were noted, with asymptomatic hypercalcemia at 3.9mmol/L. A renal ultrasound was performed and showed echogenic medullary pyramids bilaterally, consistent with nephrocalcinosis and left nephrolithiasis. The treatment of hypercalcemia included hyperhydration, a diuretic and corticosteroids. Progression was characterized by the total regression of skin lesions and normalization of serum calcium. Hypercalcemia is a rare complication of subcutaneous fat necrosis. It develops within days to weeks after the appearance of skin lesions. Nephrocalcinosis appears after several weeks or months. Hypercalcemia must be treated in due time to avoid the impact on the kidney. PMID:23726682

Tizki, S; Lasry, F; Elftoiki, F Z; Hadj Khalifa, H; Itri, M; Khadir, K; Benchikhi, H

2013-07-01

227

Endovascular stent grafting: a review  

Energy Technology Data Exchange (ETDEWEB)

Endovascular stent grafts are intravascular devices composed of surgical graft material and a metallic frame, (Fig. 1). Their main application has been to treat aneurysms, but they have been used in vascular trauma and are being investigated for use in occlusive disease. Their advantage in treating aneurysms over conventional surgical treatment is that they are loaded into relatively small delivery systems (Fig. 2) and can be introduced to the area of interest from a remote site - usually the femoral artery. This avoids the morbidity of surgical exposure in difficult sites, such as the thoracic aorta, and lessens the cardiovascular stress to patients by eliminating the need to surgically cross-clamp the vessel being treated. The first description of abdominal aortic aneurysm exclusion by an endovascular stent graft was provided by Parodi and colleagues in 1991. Much of the early clinical experience in endovascular stent grafting was obtained from centres in Australia and Europe, and they are now reporting midterm follow-up data. There are now many centres in Canada and the United States involved in endovascular research and practice. (author)

Kribs, S. [Univ. of Western Ontario, Dept. of Vascular and Interventional Radiology, London, Ontario (Canada)

2001-06-01

228

Polyether-polyester graft copolymer  

Science.gov (United States)

Described is a polyether graft polymer having improved solvent resistance and crystalline thermally reversible crosslinks. The copolymer is prepared by a novel process of anionic copolymerization. These polymers exhibit good solvent resistance and are well suited for aircraft parts. Previous aromatic polyethers, also known as polyphenylene oxides, have certain deficiencies which detract from their usefulness. These commercial polymers are often soluble in common solvents including the halocarbon and aromatic hydrocarbon types of paint thinners and removers. This limitation prevents the use of these polyethers in structural articles requiring frequent painting. In addition, the most popular commercially available polyether is a very high melting plastic. This makes it considerably more difficult to fabricate finished parts from this material. These problems are solved by providing an aromatic polyether graft copolymer with improved solvent resistance and crystalline thermally reversible crosslinks. The graft copolymer is formed by converting the carboxyl groups of a carboxylated polyphenylene oxide polymer to ionic carbonyl groups in a suitable solvent, reacting pivalolactone with the dissolved polymer, and adding acid to the solution to produce the graft copolymer.

Bell, Vernon L. (inventor)

1987-01-01

229

Markers of primary graft dysfunction  

DEFF Research Database (Denmark)

The present invention relates to methods for diagnosing transplant rejection, or a condition associated with transplant rejection, such as, primary graft dysfunction in a subject, to antigen probe arrays for performing such a diagnosis, and to antigen probe sets for generating such arrays.

Hagedorn, Peter Technical University of Denmark,

230

Weyl law for fat fractals  

CERN Document Server

It has been conjectured that for a class of piecewise linear maps the closure of the set of images of the discontinuity has the structure of a fat fractal, that is, a fractal with positive measure. An example of such maps is the sawtooth map in the elliptic regime. In this work we analyze this problem quantum mechanically in the semiclassical regime. We find that the fraction of states localized on the unstable set satisfies a modified fractal Weyl law, where the exponent is given by the exterior dimension of the fat fractal.

Spina, Maria E; Saraceno, Marcos

2010-01-01

231

Martius graft for management of exposed vaginal prolapse mesh.  

Science.gov (United States)

Although the use of vaginal mesh kits in treatment of pelvic organ prolapse (POP) has decreased the number of surgical failures, mesh exposure can occur. When conservative management fails, removing the exposed material is associated with the risk of recurrence of POP and could be challenging. We report a successful outcome of treatment of exposed mesh via use of a Martius bulbocavernosus fat pad. A 46-year-old woman had urinary incontinence and POP, which was treated using a vaginal mesh kit and tension-free vaginal tape. At 2 months after the procedure, the mesh was found to be exposed. After failed conservative management, use of a Martius graft was used, with preservation of the mesh. At 2-, 5-, and 10-month follow-up, the patient was completely asymptomatic and continent. This procedure may be a practical alternative in patients with synthetic mesh-induced vaginal erosion after failed conservative management. PMID:23295200

Al-Badr, Ahmed

2013-01-01

232

Radiation Induced Graft Copolymerization of Polyvinyl Alcohol  

International Nuclear Information System (INIS)

In order to improve the properties of polyvinyl alcohol films and fibres, the graft copolymerization of various vinyl monomers to polyvinyl alcohol films by gamma ray irradiation was investigated. When thin films of polyvinyl alcohol were irradiated in a large excess of styrene no graft copolymerization was observed. With films containing more than 5% water the grafting proceeded smoothly. The highest value of styrene grafted was about 1,000% at a dose of 7X106r. The presence of water in the monomer solution was found to increase considerably the amount of grafted monomer. Methyl methacrylate behaved similarly to styrene in the grafting to polyvinyl alcohol films, the presence of a certain amount of water being essential. The efficiency of the grafting of methyl methacrylate was generally larger than that of the grafting of styrene. The highest value of the grafted methyl methacrylate was 4,000% and obtained at a dose of 5 X 105 r. Some experiments were carried out with acrylonitrile and vinyl acetate but compared with styrene and methyl methacrylate the efficiencies of the grafting of these monomers were not so high. The degree of swelling of the graft copolymers of polyvinyl-alcohol-styrene or methyl methacrylate in organic solvents was measured at 30oC. The relation between the degree of swelling and the percentage of monomer grafted was given by (degree of swelling %) = k (monomer grafted %)n. For polymers grafted with styrene n = 1, but for those grafted with methyl methacrylate n < 1. n and k have characteristic values which depend on the solvents used. (author)

1960-07-01

233

Homogeneous cation exchange membrane by radiation grafting  

International Nuclear Information System (INIS)

Preparation of a strong cation exchange membrane by radiation grafting of styrene on to polyethylene (LDPE) film by mutual irradiation technique in the presence of air followed by sulfonation is described. The grafting has been carried out in the presence of air and without any additive. Low dose rate has been seen to facilitate the grafting. Further higher the grafting percentage more is the exchange capacity. The addition of a swelling agent during the sulfonation helped in achieving the high exchange capacity. The TGA-MASS analysis confirmed the grafting and the sulfonation. (author)

2001-12-01

234

Gravity separation of pericardial fat in cardiotomy suction blood: an in vitro model.  

Science.gov (United States)

Fat emboli generated during cardiac surgery have been shown to cause neurologic complications in patients postoperatively. Cardiotomy suction has been known to be a large generator of emboli. This study will examine the efficacy of a separation technique in which the cardiotomy suction blood is stored in a cardiotomy reservoir for various time intervals to allow spontaneous separation of fat from blood by density. Soybean oil was added to heparinized porcine blood to simulate the blood of a patient with hypertriglyceridemia (> 150 mg/dL). Roller pump suction was used to transfer the room temperature blood into the cardiotomy reservoir. Blood was removed from the reservoir in 200-mL aliquots at 0, 15, 30 45, and 60 minutes. Samples were taken at each interval and centrifuged to facilitate further separation of liquid fat. Fat content in each sample was determined by a point-of-care triglyceride analyzer. Three trials were conducted for a total of 30 samples. The 0-minute group was considered a baseline and was compared to the other four times. Fat concentration was reduced significantly in the 45- and 60-minute groups compared to the 0-, 15-, and 30-minute groups (p < .05). Gravity separation of cardiotomy suction blood is effective; however, it may require retention of blood for more time than is clinically acceptable during a routing coronary artery bypass graft surgery. PMID:19681306

Kinard, M Rhett; Shackelford, Anthony G; Sistino, Joseph J

2009-06-01

235

The role of autologous fat and alternative fillers in the aging face.  

Science.gov (United States)

Soft-tissue fillers can be used successfully to restore volume loss caused by facial aging. Injectable fillers can be used in isolation or in conjunction with other facial rejuvenation procedures. To achieve a superior aesthetic result, the plastic surgeon must understand the key components of facial aging: soft-tissue atrophy, gravitational descent, and loss of skin tone. An accurate assessment of the relationship of these factors will determine the role of soft-tissue augmentation through the use of fillers. Because the majority of facial volume loss through aging is attributable to fat loss, the authors believe that autologous fat represents the ideal soft-tissue replacement. The authors describe the appropriate use of autologous fat and improvements in technique that have enhanced the predictability of facial fat grafting. When autologous fat is not an option, alternative facial fillers including calcium hydroxylapatite and hyaluronic acid may provide excellent results. The authors' algorithm for filler selection is based on relative morbidity, recipient-site characteristics, and the physical characteristics of each filler. This algorithm is discussed in the following anatomical regions: the nasolabial folds, glabellar crease, malar region, nasojugal groove, and lips. When used appropriately, soft-tissue fillers can contribute significantly to overall facial rejuvenation. PMID:18090347

Bucky, Louis P; Kanchwala, Suhail K

2007-11-01

236

Modification of polyester fibre by radiation grafting  

International Nuclear Information System (INIS)

Polyethylene terepthalate (PET) fibre was modified by graft copolymerization with vinyl monomers using gamma radiation as a source of initiation. Efficiency of grafting was found to be dependent on swelling agents, temperature of swelling, scavenger concentration and radiation dose. Percentage graft was directly proportional to the dose. Swelling temperature vs percentage graft showed an optimum efficient temperature corresponding to glass transition temperature of PET. Similarly optimum scavenger concentration was observed at which graft yield was maximum. Tensile strength and percentage elongation increased with increase in percentage graft at low level of grafting, whereas loss in tensile properties were observed at higher graft levels. Modified fibre showed satisfactory resistance to aqueous alkali and acids as compared to unmodified polyester fibre, but was highly susceptible to alcoholic alkaline degradation. Morphological properties of the fibre were examined by X-ray diffraction studies, differential thermal analysis, thermogravimetric analysis and infrared analysis. The above investigations did not show any adverse effect due to grafting process or graft-copolymerization on the fibre properties. Dyeing of the fibre was carried out at boil and at high pressure by using different disperse dyes. Modified fibre showed a substantial increase, in equilibrium dye uptake when dyed, both at boil and at high pressure. Improvements in rate of dyeing were also evident. In conclusion, polyester fibre modified by radiation grafting had better tensile properties, improved morphological characteristics. It was faster dyeing and could be dyed to deep shades at low pressures and temperatures as compared to unmodified polyester fibre. (author)

1980-08-01

237

Grafting of vinyl monomers onto wool fibers  

International Nuclear Information System (INIS)

In recent years, graft copolymerization of vinyl monomers onto wool has gained considerable importance since preformed polymers are incapable of diffusing into the internal structures of wool Initiation must be controlled so that the radicals are formed on the fibers which will initiate polymerization of monomer diffusing into the interior of the wool. With the wide variety of vinyl and other available monomers today, grafting promises to be a potentially powerful method for producing substantial modification of wool properties. Various methods have been used for grafting vinyl monomers onto wool fibers. The most important methods which have attracted attention during the last two decades are: (1) radiation initiation, and (2) chemical initiation. Radiation graft copolymers may be initiated by two techniques, (i) preirradiation technique, and (ii) simultaneous or mutual radiation grafting. In general the latter methods lead to much larger amounts of polymer being grafted to the substrate. Methods of vinyl graft copolymerization of wool through chemical initiation are mentioned. (author)

1980-08-01

238

Studies on radiation-induced graft polymerization  

International Nuclear Information System (INIS)

Radiation-induced graft polymerization is used extensively to improve physical properties of polymers, but few processes are now commercialized. The reason for this is partly inadequate basic research on the reaction and partly the difficulty in developing the grafting process with large radiation source. Firstly, new techniques are proposed of studying kinetics of the graft polymerization in heterogeneous system. Based on the grafting yield, the molecular weight of graft chains, and the amount of radicals given by ESR and activation analysis, kinetic parameters are obtained and the reaction mechanism of grafting process is discussed. Secondly, the development of grafting process of poly (vinyl chloride)-butadiene is described. By study of the reaction, process design, construction and operation of the pilot plant, and economic analysis of the process, this process with "6"0Co gamma ray sources is shown to be industrially promising. (author)

1978-01-01

239

FTO gene associated fatness in relation to body fat distribution and metabolic traits throughout a broad range of fatness  

DEFF Research Database (Denmark)

A common single nucleotide polymorphism (SNP) of FTO (rs9939609, T/A) is associated with total body fatness. We investigated the association of this SNP with abdominal and peripheral fatness and obesity-related metabolic traits in middle-aged men through a broad range of fatness present already in adolescence.

Kring, Sofia I I; Holst, Claus

2008-01-01

240

Frequently Asked Questions about "Better" Fats  

Science.gov (United States)

... seafood are recommended sources of these fats. Monounsaturated: Canola oil, olive oil, peanut oil, sunflower oil, avocados, and ... seafood are recommended sources of these fats. Monounsaturated: Canola oil, olive oil, peanut oil, sunflower oil, avocados, and ...

 
 
 
 
241

HealthLines: Facts About Fat  

Science.gov (United States)

... Current Issue Past Issues Health Lines Facts About Fat Past Issues / Fall 2008 Table of Contents For ... Writer, NLM Scientists are learning more about our fat cells, and their findings could explain why some ...

242

Degradation of Fat by Pathogenic Leptospirae.  

Science.gov (United States)

A new method (utilizing glass plates covered with a thin layer of fat) was employed in the study of lipoid degradation (especially that of beef tallow) by pathogenic leptospirae. The tested fats were attacked most vigorously by virulent leptospirae belong...

F. Kemenes L. Lovrekovich

1968-01-01

243

Dietary Fats and Your Heart  

Medline Plus

Full Text Available ... March 21, 2014 Related MedlinePlus Pages Dietary Fats Heart Diseases--Prevention Transcript In recent years, nutritional guidelines have ... to 23 years. After comparing nutrition records with heart disease histories, the study team found sparse backup for ...

244

Hydrophilic Silicone Resins Obtained by Radiation Grafting  

International Nuclear Information System (INIS)

N-vinylpyrrolidone was grafted radiochemically on a silicone resin by pre-irradiation in the presence of oxygen. Under these conditions, peroxide groups capable of initiating radical copolymerization are formed. The trapped radicals do not seem to make any contribution. An RTV (Room Temperature Vulcanization) type silicone resin was used, i. e. a poly(dimethylsiloxane) crosslinked by vinyl-silane bonds. The unsaturated product was transparent. The silicones containing phenyl groups as well as saturated resins were also studied. Irradiation with 60Co gamma rays was performed in the 10-kCi irradiator of the Radiation Applications Group (GAR) at Saclay. Brief pre-irradiation tests with an electron accelerator were also performed. The amount of polyvinylpyrrolidone(PVP) grafted depends on the pre-irradiation dose and dose-rate as well as on the temperature and duration of the grafting proper. These different parameters were analysed. The grafting efficiency of PVP can be as much as 60%. The grafted copolymers are more or less opaque and coloured sections show that grafting remains peripheral. The transparency can be restored by immersion in water. The swelling in water is such that the ratio of absorbed water to grafted PVP varies between 0.8 and 1.5. When the grafting efficiency is higher than 50%, it is observed that the grafted PVP redissolves after swelling. The redissolving is due to the breaking of the grafted chains. For grafting rates below 30%, the grafted PVP silicones have notably high thermal stability. Examination of some properties of the grafted PVP silicones shows the additive nature of the properties of the grafted copolymers. Reference is made to the possible applications of these products, especially in biology and medicine. (author)

1969-12-01

245

Radiation-induced grafting of diallyldimethylammonium chloride onto acrylic acid grafted polyethylene  

Energy Technology Data Exchange (ETDEWEB)

Diallyldimethylammonium chloride (DADMAC) was grafted onto polyethylene (PE) films by a double grafting procedure. The PE film was initially modified by grafting acrylic acid (AA), through a mutual irradiation method. AA-g-PE film, thus obtained was subjected to subsequent radiation grafting reaction of DADMAC, to give a DADMAC-g-AA-g-PE film having a comb-type structure. The influence of different conditions, such as the extent of AA grafting, DADMAC concentration, absorbed dose and dose rate, on the grafting yield of DADMAC was investigated. A maximum DADMAC grafting of 30% was achieved. The equilibrium degree of swelling (EDS) of the grafted films were gravimetrically determined. TGA and FT-IR techniques were employed to characterize the grafted PE films.

Francis, Sanju [Radiation Technology Development Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)], E-mail: sanju@barc.gov.in; Dhanawade, B.R.; Mitra, D.; Varshney, Lalit; Sabharwal, Sunil [Radiation Technology Development Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)

2009-01-15

246

Radiation-induced grafting of diallyldimethylammonium chloride onto acrylic acid grafted polyethylene  

International Nuclear Information System (INIS)

Diallyldimethylammonium chloride (DADMAC) was grafted onto polyethylene (PE) films by a double grafting procedure. The PE film was initially modified by grafting acrylic acid (AA), through a mutual irradiation method. AA-g-PE film, thus obtained was subjected to subsequent radiation grafting reaction of DADMAC, to give a DADMAC-g-AA-g-PE film having a comb-type structure. The influence of different conditions, such as the extent of AA grafting, DADMAC concentration, absorbed dose and dose rate, on the grafting yield of DADMAC was investigated. A maximum DADMAC grafting of 30% was achieved. The equilibrium degree of swelling (EDS) of the grafted films were gravimetrically determined. TGA and FT-IR techniques were employed to characterize the grafted PE films

2009-01-01

247

Luteinized fat in Krukenberg tumor: MR findings  

Energy Technology Data Exchange (ETDEWEB)

To our knowledge, there is no description of the fat-containing Krukenberg tumor. We report on a case of Krukenberg tumor associated with luteinized fat, which showed hyperintensity on T1-weighted MR image. The diagnosis was surgically confirmed. Hyperintense portion of the Krukenberg tumor on T1-weighted image showed diminished signal intensity on fat-saturated, T1-weighted images. Krukenberg tumor should be considered in the differential diagnosis of ovarian masses when fat signal is seen. (orig.)

Jeong, Yong Yeon; Kang, Heoung Keun; Seo, Jeong Jin [Department of Diagnostic Radiology, Chonnam National University Medical School, Hack-dong, Dong-ku Gwangju 501-757 (Korea); Nam, Jong Hee [Department of Anatomic Pathology, Chonnam National University Medical School, Hack-dong, Dong-ku Gwangju 501-757 (Korea)

2002-07-01

248

Luteinized fat in Krukenberg tumor: MR findings  

International Nuclear Information System (INIS)

To our knowledge, there is no description of the fat-containing Krukenberg tumor. We report on a case of Krukenberg tumor associated with luteinized fat, which showed hyperintensity on T1-weighted MR image. The diagnosis was surgically confirmed. Hyperintense portion of the Krukenberg tumor on T1-weighted image showed diminished signal intensity on fat-saturated, T1-weighted images. Krukenberg tumor should be considered in the differential diagnosis of ovarian masses when fat signal is seen. (orig.)

2002-01-01

249

Fat contamination of pericardial suction blood in cardiac surgery : clinical and experimental studies in perspectives of transfusion logistics  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Introduction: During cardiac surgery aided by cardiopulmonary bypass (CPB) the autotransfusion of pericardial suction blood (PSB) is regarded mandatory to limit allogeneic blood exposure. PSB is however proposed as a source of lipid microemboli and to contribute to brain damage. This thesis addresses the logistics of allogeneic blood transfusion during coronary artery bypass grafting (CABG), the embolic potential of reinfused PSB, and means to reduce PSB fat contamination, investigated both c...

2006-01-01

250

Endovascular Stent-Graft Repair as a Late Secondary Procedure After Previous Aortic Grafts  

International Nuclear Information System (INIS)

Thoracic and abdominal aortic endovascular procedures as alternatives to aortic reoperations were studied in three different cases. An anastomotic aneurysm after previous thoracic aortic graft for coarctation, a second-stage elephant trunk repair (descending thoracic aortic aneurysm), and a secondary aneurysm proximal to a previous abdominal aortic graft were successfully treated with endovascular stent-grafts. During the follow-up period no lethal events or major aortic or graft-related complications were observed, except a type II endoleak in the anastomotic aortic aneurysm case. An endovascular stent-graft can be safely deployed into a previously implanted vascular graft, avoiding repeat surgery

2006-08-01

251

Determining the degree of grafting for poly (vinylidene fluoride) graft-copolymers using fluorine elemental analysis  

International Nuclear Information System (INIS)

Acrylic acid (AAc) and styrene (St) were grafted onto poly (vinylidene fluoride) (PVDF) powder or membrane samples by pre-irradiation graft copolymerization. The grafted chains were proved by FT-IR spectroscopy analysis. The degree of grafting (DG) of the grafted PVDF was determined by fluorine elemental analysis (FEA) method, and was compared with the DGs determined by weighing method, acid-base back titration method and quantitative FT-IR method. The results show that the FEA method is accurate, convenient and universal, especially for the grafted polymer powders. (authors)

2011-02-01

252

Cationic membrane obtained by radiation grafting method  

International Nuclear Information System (INIS)

A study has been made for the preparation of ion-containing reverse osmosis membranes by the radiation grafting of aqueous acrylic acid onto low density polyethylene films followed by alkaline treatment to confer ionic character in the prepared membranes. The appropriate reaction conditions were selected under which the graft polymerization was carried out successfully. In this grafting system ammonium ferrous sulphate (Mohr's salt) was used as inhibitor to minimize the homopolymerization of AAc, and a suitable concentration of the inhibitor to be added to the reaction medium was found to be 2.5 wt%. The effect of aqueous monomer concentration on the rate and degree of grafting was studied. The dependence of the grafting rate on the monomer concentration was found to be 0.8 order, i.e. almost first order dependence. It was also found that the irradiation atmosphere (air and nitrogen gas) had no significant effect on the grafting yield at given reaction conditions. The prepared graft copolymer films showed good thermal and chemical stability. Gel determination in the grafted films was also investigated and the results indicated that a crosslinked network structure may be formed. The extent of the gelled part in the graft copolymer increased as the degree of grafting increased. (author)

1987-01-01

253

Septal graft in laryngeal reconstruction  

International Nuclear Information System (INIS)

A 62-year-old woman presented with symptoms of dyspnea. Ultrasonography and computed tomography examinations revealed mass extending from the cricoid cartilage to the left lobe of thyroid gland and thyroid cartilage. Cytology revealed possibility of cartilaginous origin, which was proven to be chondrosarcoma (Grade 1) from the biopsy specimen obtained during panendosopy. She underwent one stage radical resection and immediate reconstruction of laryngeal skeleton defect by mucocartilaginous graft from the nasal septum. Her postoperative course was optimal with preservation of the laryngeal functions. Twenty-eight months postoperatively, she had to undergo total laryngectomy as a salvage procedure for the advanced local recurrence. We report on the relatively easy technique for functional reconstruction of the large laryngeal defect with the employment cartilage graft from the nasal septum. (author)

2006-01-01

254

Management of graft occlusion following aortobifemoral bypass.  

Science.gov (United States)

BACKGROUND: There is doubt as to whether operative mortality and subsequent graft patency and limb salvage rates support repeated efforts at revascularisation in patients with occluded aortobifemoral grafts. STUDY DESIGN: Prospective study of hospital patients with aortobifemoral graft occlusion presenting to the Durban metropolitan hospitals. The study was designed to assess outcome of revascularisation in these patients. METHOD: This is an analysis of 65 patients who developed graft occlusion out of a total of 492 aortobifemoral bypasses monitored over a 9-year period. Patients were investigated with angiography before being subjected to re-operation. They were followed up in the vascular clinic. RESULTS: The incidence of graft occlusion in this cohort was 15%. There were 11 early occlusions (2.6 days after the procedure) and 54 late occlusions (28 months after the procedure). Eight early graft occlusions were managed by means of thrombectomy, 1 with additional profundoplasty, and 3 were managed conservatively. Late complications were graft occlusion (1), graft sepsis (1) and aorto-enteric fistula (1). Late graft occlusions were managed by crossover (18), profundoplasty (7), axillo-femoral bypass (5), graft limb reconstruction (5) and redo procedures (2); 20 patients were managed conservatively. There was 1 postoperative death among the patients who experienced early occlusion, and none among those with late occlusion. Long term complications included secondary graft occlusions (3), graft sepsis (1) and amputations (5). The limb salvage rate was 63%. CONCLUSION: This study has shown that acceptable results can be achieved with surgery for graft occlusion following aortobifemoral bypass and that different treatment options are available. PMID:11447467

Madiba, T. E.; Abdool-Carrim, A. T.; Mars, M.; Nair, R.; Robbs, J. V.

2000-04-01

255

Bypass grafts to the ankle and foot.  

Science.gov (United States)

Two hundred forty-three bypasses to paramalleolar arteries were performed in 224 extremities of 208 patients since 1971; 166 were implanted in men (68%) and 77 in women (32%). The median age was 73 years. Gangrene (61%), nonhealing ulcer (15%), rest pain (22%), and trauma (2%) were the indications for bypass. Usual risk factors were noted: diabetes (65%), smoking (51%), heart disease (46%), and hypertension (45%). The extent of occlusive disease dictated three graft configurations: long grafts originating in arteries proximal to the adductor tendon (n = 111), short grafts originating at or below the popliteal artery (n = 88), and jump grafts originating near the distal end of a previous femorodistal bypass (n = 44). The association between diabetes (incidence 80%) and gangrene (75%) in patients with short grafts was statistically significant (p less than 0.01). The 2-year secondary patency rate of long in situ grafts was 92% compared with 72% for other autogenous vein long grafts. The limb salvage rate for all autogenous vein long grafts was 90% at 3 years. The secondary patency rate at 3 years for short grafts was 81% and the limb salvage rate was 80%. There were four amputations with patent grafts. Primary and secondary patency rates of jump grafts were similar (53%), whereas the limb salvage rate was 89% at 2 years. Patency and limb salvage rates of rarely employed nonautogenous conduits were less than 35% at 1 year (long grafts). Bypass grafts to the ankle and foot are effective and durable and should be performed with autogenous vein. PMID:3373620

Andros, G; Harris, R W; Salles-Cunha, S X; Dulawa, L B; Oblath, R W; Apyan, R L

1988-06-01

256

Acute graft versus host disease  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Acute graft-versus-host disease (GVHD) occurs after allogeneic hematopoietic stem cell transplant and is a reaction of donor immune cells against host tissues. Activated donor T cells damage host epithelial cells after an inflammatory cascade that begins with the preparative regimen. About 35%–50% of hematopoietic stem cell transplant (HSCT) recipients will develop acute GVHD. The exact risk is dependent on the stem cell source, age of the patient, conditioning, and GVHD prophylaxis used. G...

Jacobsohn, David A.; Vogelsang, Georgia B.

2007-01-01

257

Acute graft versus host disease  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Abstract Acute graft-versus-host disease (GVHD) occurs after allogeneic hematopoietic stem cell transplant and is a reaction of donor immune cells against host tissues. Activated donor T cells damage host epithelial cells after an inflammatory cascade that begins with the preparative regimen. About 35%–50% of hematopoietic stem cell transplant (HSCT) recipients will develop acute GVHD. The exact risk is dependent on the stem cell source, age of the patient, conditioning, and GVHD ...

Jacobsohn David A; Vogelsang Georgia B

2007-01-01

258

Post-surgical complications of symphyseal block graft with and without soft tissue grafting  

Directory of Open Access Journals (Sweden)

Full Text Available Objectives: To determine whether soft tissue augmentation prior to block grafting will minimize post-block grafting soft tissue complications. Methods: This longitudinal controlled pilot study was conducted at the Faculty of Dentistry, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia from October 2010 to January 2013. Fourteen sites requiring block grafting were divided into 2 groups: Group A - 7 sites in 6 patients were subjected to monocortical block graft (control; and Group B - 7 sites in 6 patients were subjected to soft tissue graft through new tunnel technique, followed by monocortical block graft (test. Results: In Group A, 2 patients had wound dehiscence and graft exposure. The first that had an exposure of 3x4 mm resulted in 45% resorption of the graft. The second had an exposure of 4x5 mm followed by infection, which resulted in 75% resorption of the graft. In the other 5 cases, sites healed with no complications and minimal resorption (0-15%. In Group B - there were generalized 1-2 mm increases in the thickness of soft tissue following soft tissue graft. Recipient sites healed with no complications or infection following block grafting. Block graft resorption ranged from 0-15%. Conclusion: More complications were seen in those patients who did not receive soft tissue augmentation, thus demonstrating the importance of soft tissue preparation prior to block grafting, especially in patients having thin soft tissue. 

Ali S. AlGhamdi

2013-06-01

259

Interventions in infrainguinal bypass grafts  

International Nuclear Information System (INIS)

The long-term success of infrainguinal bypass grafts depends on meticulous surgical technique and a periodic program of postoperative surveillance. Duplex scanning is the method of choice for the detection of stenotic lesions that threaten graft patency. As an alternative to surgery, PTA is gaining increasing acceptance for the treatment of non-recurrent, short, and single stenotic lesions, despite somewhat controversial opinions. The initial technical success rates for PTA were reported to be up to 100%, and a 5-year primary assisted patency rate of up to 65% has been achieved. Some authors favorize intra-arterial infusion of fibrinolytic agents for the treatment of bypass graft occlusion with technical success rates of up to 92%. In addition to a reduced trauma compared to surgical thrombectomy, of the venous wall the advantage of thrombolytic therapy is clot lysis in run-off vessels, and uncovering of the stenotic lesions. This stenosis may then be treated by an endovascular or surgical approach. (orig.)

2001-12-01

260

Evaluation of early coronary graft patency after coronary artery bypass graft surgery using multislice computed tomography angiography  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Coronary artery bypass graft (CABG surgery is the standard of care in the treatment of advanced coronary artery disease, and its long-term results are affected by the failure of bypass grafts. The aim of the present study was to evaluate the early patency rate in coronary bypass grafts. Methods A total of 107 consecutive patients who underwent CABG were included in this study. Early graft patency was evaluated via computed tomography (CT angiography in the first week after surgery. Results There were a total of 366 grafts, comprised of 250 venous grafts and 116 arterial grafts. Multi-slice CT detected acute graft occlusions in 32 (8.7% of all the grafts, including 26 (10% of the 250 venous grafts and 6 (5% of the 116 arterial grafts. The patency rates obtained were 97.3% for the left internal mammary (IMA grafts, 50% for the radial artery grafts, and 50% for the right IMA grafts. Additionally, 107 (96.4% grafts to the left anterior descending artery (LAD were classified as patent, whereas 1 (30% of the 3 grafts in the left circumflex (LCX region and 1 (50% of the 2 grafts in the right coronary artery (RCA territory were found to be occluded. In the venous category, 8 (13.7% of the 58 grafts to LAD were found to be occluded. In the LCX region, 9 (8.5% of the 106 grafts were classified as occluded, while the remaining 97 (91.5% grafts were patent. The venous grafts to RCA were occluded in 9 (10.4% of the 86 grafts. Amongst the multiple preoperative, intraoperative, and postoperative factors, pump time was significantly longer in the patients with occluded grafts than in those with patent grafts (P = 0.04. Conclusion The IMA grafts had the highest early patency rate amongst the coronary bypass grafts. However, the other arterial grafts were associated with a high rate of acute occlusions.

Raissi Kamal

2009-12-01

 
 
 
 
261

Low fat meat products - An overview  

Directory of Open Access Journals (Sweden)

Full Text Available Meat is an excellent source of valuable nutrients. Meat fat acts as a reservoir for flavor compounds and contributes to the texture of product. There are diverse possible strategies for developing low fat meat and meat products. Reducing the fat content in products leads to a firmer, rubbery, less juicy product with dark color and more cost. Other technological problems like reduction in particle binding, reduced cook yields, soft and mushy interiors, rubbery skin formation, excessive purge and shortened shelf life are also associated with reduction in fat levels. This paper describes Procedured of reducing fat content, Selection of additives, Protein, Carbohydrat and fat based fat replacer and Super critical fluid extraction. [Vet World 2009; 2(9.000: 364-366

E. Naga Mallika

262

Fat Triangulations and Differential Geometry  

CERN Multimedia

We study the differential geometric consequences of our previous result on the existence of fat triangulations, in conjunction with a result of Cheeger, M\\"{u}ller and Schrader, regarding the convergence of Lipschitz-Killing curvatures of piecewise-flat approximations of smooth Riemannian manifolds. A further application to the existence of quasiconformal mappings between manifolds, as well as an extension of the triangulation result to the case of almost Riemannian manifolds, are also given. In addition, the notion of fatness of triangulations and its relation to metric curvature and to excess is explored. Moreover, applications of the main results, and in particular a purely metric approach to Regge calculus, are also investigated.

Saucan, Emil

2011-01-01

263

Grafting rays fellow travel Teichmuller geodesics  

CERN Document Server

Given a measured geodesic lamination on a hyperbolic surface, grafting the surface along multiples of the lamination defines a path in Teichmuller space, called the grafting ray. We show that every grafting ray, after reparametrization, is a Teichmuller quasi-geodesic and stays in a bounded neighborhood of a Teichmuller geodesic. As part of our approach, we show that grafting rays have controlled dependence on the starting point. That is, for any measured geodesic lamination Lambda, the map of Teichmuller space which is defined by grafting along Lambda is L-Lipschitz with respect to the Teichmuller metric, where L is a universal constant. This Lipschitz property follows from an extension of grafting to an open neighborhood of Teichmuller space in the space of quasi-Fuchsian groups.

Choi, Young-Eun; Rafi, Kasra

2010-01-01

264

Exploring the Diversification in Grafted Copolymer  

Directory of Open Access Journals (Sweden)

Full Text Available Background & Aim: The paper deals with optimization of the reaction parameters, graft copolymerization, characterization and evaluation of the transformations in Roselle stem fiber on graft copolymerization with vinyl monomer, using ceric ammonium nitrate nitric acid initiator system. Methods: Different reaction parameters such as temperature, time, initiator concentration, monomer concentration and pH were optimized to get the maximum graft yield. The graft copolymer thus formed were characterized by advanced techniques. Results: The physico-chemico-thermal resistance, moisture absorbance,swelling behavior of graft copolymers and the dye uptake behavior were studied and found to have improved. Conclusion:Hence, this first report of novel graft copolymers is to help towards various applications.

Ashish Chauhan

2012-06-01

265

Fixation of tibial plateau fractures with synthetic bone graft versus natural bone graft: a comparison study.  

LENUS (Irish Health Repository)

The goal of this study was to determine differences in fracture stability and functional outcome between synthetic bone graft and natural bone graft with internal fixation of tibia plateau metaphyseal defects.

Ong, J C Y

2012-06-01

266

Study on polyethylene films grafted with vinyl acetate and ethyl methacrylate by radiation grafting  

International Nuclear Information System (INIS)

Low density polyethylene (LDPE) films were grafted with a vinyl acetate (VAc) and ethyl methacrylate (EMA) commoner mixture by radiation using a 60Co gamma source. IR spectra and x-ray diffraction (XRD) for the original PE matrix and for the graft copolymers were studied. Electrical conductivity and thermal properties of the prepared grafted materials were also measured. XRD results showed that poly(vinyl acetate/ethyl methacrylate) P(VAc/EMA) graft chains cause a decrease in the crystallinity of the PE polymer substrate. The changes in thermal parameters such as melting (Tm) and crystallization (Tc) temperatures and heats of melting (?Hm) and crystallization (?Hc) of the graft copolymers were followed by differential scanning calorimetry (DSC) and for thermal stability by TGA. These thermal parameters of PE were influenced by grafting, with VAc and EMA and depended on the percent grafting, which reflected the change in crystallinity due to formation of branches via the grafted chains. (author)

2000-12-01

267

Fat and Thin Fisher Zeroes  

CERN Document Server

We show that it is possible to determine the locus of Fisher zeroes in the thermodynamic limit for the Ising model on planar (``fat'') phi4 random graphs and their dual quadrangulations by matching up the real part of the high- and low-temperature branches of the expression for the free energy. Similar methods work for the mean-field model on generic, ``thin'' graphs. Series expansions are very easy to obtain for such random graph Ising models.

Janke, W; Stathakopoulos, M

2002-01-01

268

Playing with bone and fat  

DEFF Research Database (Denmark)

The relationship between bone and fat formation within the bone marrow microenvironment is complex and remains an area of active investigation. Classical in vitro and in vivo studies strongly support an inverse relationship between the commitment of bone marrow-derived mesenchymal stem cells or stromal cells to the adipocyte and osteoblast lineage pathways. In this review, we focus on the recent literature exploring the mechanisms underlying these differentiation events and discuss their implications relevant to osteoporosis and regenerative medicine.

Gimble, Jeffrey M.; Zvonic, Sanjin

2006-01-01

269

Fat containing chylous mesenteric lymphangiomatosis  

International Nuclear Information System (INIS)

We have experienced an unusual case of mesenteric lymphangiomatosis in a 6-month-old male infant. Computed tomography (CT) disclosed fatty abdominal masses with attenuation coefficient being -5?-28 Hounsfield units (HU). Laparotomy disclosed innumerable small and large chyle containing masses in the mesentery as well as mesenteric root. Pathologically these were confirmed to be cavernous and cystic lymphangiomatosis. One must bear in mind the possibility of lymphangioma in case of fat containing mesenteric mass on CT

1984-03-01

270

Bone grafting in total hip replacement  

International Nuclear Information System (INIS)

MRI of ten hip joints in nine patients with total hip replacement and reconstruction of the acetabulum with autologous bone grafts, were reviewed. The viability of inserted bone grafts was clearly documented by MRI. Characteristic differences in signal intensity between autologous and homologous bone grafts are discussed. Despite extended metallic artifacts in the operated region, sufficient diagnostic information was available in most cases. No side effects were reported. (orig.)

1989-01-01

271

Electrokinetic properties of commercial vascular grafts  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The surface morphology and chemical composition (the presence or absence of surface functional groups) of commercial vascular grafts? surfaces are significant for their interaction abilities with components of polar liquids. This can also be assumed as correct for grafts-blood interactions. In this paper we studied the adsorption characteristics of different grafts? surfaces using an electrokinetic measurement technique. A comparative study was performed on woven, knitted polyethylene terep...

2012-01-01

272

Grafting of Methacrylonitrile and Ethyl Methacrylate onto Jute Fibre: Physico-chemical Characteristics of Grafted Jute  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Modification of bleached jute fibre was done by graft co-polymerization with vinyl monomers e.g. methacrylonitrile and ethyl methacrylate, in aqueous medium using H2O2-Na2S2O3 as redox initiators. To make the process efficient, the optimized polymerization condition was established. The maximum percent grafting and grafting efficiency obtained at optimum grafting condition were 11.3 and 20.4% for MAN, respectively and that of 17.6 and 27....

Mondal, Md Ibrahim H.; Faisul Islam Farouqui; Md. Abu Hanif; Shafiur Rahman, G. M.; Md. Asadul Hoque

2005-01-01

273

Basics of vascular stents and stent grafts  

International Nuclear Information System (INIS)

We describe here the basic interventional therapy using stents and stent grafts. Recently vascular stents and stent grafts have achieved significant advances in the treatment of peripheral arterial disease, renal and carotid artery stenosis and aortic aneurysms. Compared with surgical treatment, imaging is considered to be important for case selection, planning and device selection in interventional procedures. Eventually, commercial stents and stent grafts have become available with acceptable outcomes. Endovascular stent grafting shows potential as a safe and useful treatment for aortic disease, but further investigations should attempt to determine its efficacy over a longer follow-up period. (author)

2010-01-01

274

Glycosaminoglycan distribution in atherosclerotic saphenous vein grafts.  

Science.gov (United States)

Glycosaminoglycan composition of normal saphenous veins and atherosclerotic saphenous vein grafts is reported. Dermatan sulfate is the main glycosaminoglycan present in both normal saphenous veins and saphenous vein grafts. These tissues also contain chondroitin sulfate and heparan sulfate. Although the total amount of glycosaminoglycans decreased in the grafts (compared with normal saphenous veins), the grafts showed an increase in the relative amounts of dermatan sulfate and chondroitin sulfate. Heparan sulfate was decreased, compared with normal controls. These findings suggest the involvement of blood vessel glycosaminoglycans (not only the arterial glycosaminoglycans) in the process of atherosclerosis. PMID:7728804

Marquezini, M V; Strunz, C M; Dallan, L A; Toledo, O M

1995-01-01

275

Nuclear accidents and bone marrow graft  

International Nuclear Information System (INIS)

In case of serious contamination, the only efficacious treatment is the bone marrow grafts. The graft types and conditions have been explained. To restrict the nuclear accidents consequences, it is recommended to: - take osseous medulla of the personnel exposed to radiations and preserve it , that permits to carry out rapidly the auto-graft in case of accidents; - determine, beforehand, the HLA group of the personnel; - to register the voluntary donors names and addresses, and their HLA group, that permits to find easily a compatible donar in case of allo-graft. (author)

1988-01-01

276

Projective structures, grafting, and measured laminations  

CERN Document Server

We show that grafting any fixed hyperbolic surface defines a homeomorphism from the space of measured laminations to Teichmuller space, complementing a result of Scannell-Wolf on grafting by a fixed lamination. This result is used to study the relationship between the complex-analytic and geometric coordinate systems for the space of complex projective ($\\CP^1$) structures on a surface. We also study the rays in Teichmuller space associated to the grafting coordinates, obtaining estimates for extremal and hyperbolic length functions and their derivatives along these grafting rays.

Dumas, David

2007-01-01

277

Pancreaticoportal fistula and disseminated fat necrosis after revision of a transjugular intrahepatic portosystemic shunt.  

Science.gov (United States)

A 59-year old man with alcohol related cirrhosis and portal hypertension was referred for transjugular intrahepatic portosystemic shunt (TIPS) to treat his refractory ascites. Ten years later, two sequential TIPS revisions were performed for shunt stenosis and recurrent ascites. After these revisions, he returned with increased serum pancreatic enzyme levels and disseminated superficial fat necrosis; an iatrogenic pancreaticoportal vein fistula caused by disruption of the pancreatic duct was suspected. The bare area of the TIPS was subsequently lined with a covered stent-graft, and serum enzyme levels returned to baseline. In the interval follow-up period, the patient has clinically improved. PMID:22526102

Klein, Seth J; Saad, Nael; Korenblat, Kevin; Darcy, Michael D

2013-04-01

278

Pancreaticoportal Fistula and Disseminated Fat Necrosis After Revision of a Transjugular Intrahepatic Portosystemic Shunt  

Energy Technology Data Exchange (ETDEWEB)

A 59-year old man with alcohol related cirrhosis and portal hypertension was referred for transjugular intrahepatic portosystemic shunt (TIPS) to treat his refractory ascites. Ten years later, two sequential TIPS revisions were performed for shunt stenosis and recurrent ascites. After these revisions, he returned with increased serum pancreatic enzyme levels and disseminated superficial fat necrosis; an iatrogenic pancreaticoportal vein fistula caused by disruption of the pancreatic duct was suspected. The bare area of the TIPS was subsequently lined with a covered stent-graft, and serum enzyme levels returned to baseline. In the interval follow-up period, the patient has clinically improved.

Klein, Seth J., E-mail: kleins@mir.wustl.edu; Saad, Nael [Washington University School of Medicine, Interventional Radiology Section, Mallinckrodt Institute of Radiology (United States); Korenblat, Kevin [Washington University School of Medicine, Division of Gastroenterology, Department of Internal Medicine (United States); Darcy, Michael D. [Washington University School of Medicine, Interventional Radiology Section, Mallinckrodt Institute of Radiology (United States)

2013-04-15

279

Graft union formation in artichoke grafting onto wild and cultivated cardoon: an anatomical study.  

Science.gov (United States)

In order to develop a non-chemical method such as grafting effective against well-known artichoke soil borne diseases, an anatomical study of union formation in artichoke grafted onto selected wild and cultivated cardoon rootstocks, both resistant to Verticillium wilt, was performed. The cardoon accessions Belgio (cultivated cardoon) and Sardo (wild cardoon) were selected as rootstocks for grafting combinations with the artichoke cv. Romolo. Grafting experiments were carried out in the autumn and spring. The anatomical investigation of grafting union formation was conducted by scanning electron microscopy (SEM) on the grafting portions at the 3rd, 6th, 10th, 12th day after grafting. For the autumn experiment only, SEM analysis was also performed at 30 d after grafting. A high affinity between artichoke scion and cardoon rootstocks was observed, with some genotype differences in healing time between the two bionts. SEM images of scion/rootstock longitudinal sections revealed the appearance of many interconnecting structures between the two grafting components just 3d after grafting, followed by a vascular rearrangement and a callus development during graft union formation. De novo formation of many plasmodesmata between scion and rootstock confirmed their high compatibility, particularly in the globe artichoke/wild cardoon combination. Moreover, the duration of the early-stage grafting process could be influenced not only by the scion/rootstock compatibility, but also by the seasonal conditions, being favored by lower temperatures and a reduced light/dark photoperiod. PMID:23932643

Trinchera, Alessandra; Pandozy, Gianmarco; Rinaldi, Simona; Crinò, Paola; Temperini, Olindo; Rea, Elvira

2013-12-15

280

Induced-pluripotent stem cells seeded acellular peripheral nerve graft as “autologous nerve graft  

Directory of Open Access Journals (Sweden)

Full Text Available The hypothesis is that induced pluripotent stem cells (iPSC derived Schwann cells and/or macrophages can be transplanted into acellular nerve graft in repairing injured nervous system. The efficiency of iPSC seeded acellular nerve graft may mimic the autologous peripheral nerve graft.

Ti-Fei Yuan

2010-01-01

 
 
 
 
281

Induced-pluripotent stem cells seeded acellular peripheral nerve graft as “autologous nerve graft  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The hypothesis is that induced pluripotent stem cells (iPSC) derived Schwann cells and/or macrophages can be transplanted into acellular nerve graft in repairing injured nervous system. The efficiency of iPSC seeded acellular nerve graft may mimic the autologous peripheral nerve graft.

Jiang Li; Guo-Dong Gao; Ti-Fei Yuan

2010-01-01

282

Nutritional and Health Effects of Dietary Fats  

Directory of Open Access Journals (Sweden)

Full Text Available In the 80`s and early 90`s, nutrition recommendations for the prevention of developing coronary heart disease called for a reduction of total fat in the diet through the substitution of carbohydrate for fat. However, the current scientific evidence does not support a position that a reduction in total fat has a beneficial effect on coronary heart disease, or risk factors for coronary heart disease. The cumulative evidence from recent scientific literature suggests that unless there is a concomitant reduction in saturated fat and trans fatty acids, a reduction in total fat will not lower the risk of developing coronary heart disease. It was also established during the last decade that increased intakes of dietary monounsaturated and polyunsaturated fats, in particular those fats containing moderate amounts of n-3 fatty acids, might play a role in reducing the risk of cardiovascular disease. The fatty acid composition of canola oil is consistent with current nutrition recommendations aimed at reducing the dietary amount of saturated fat and increasing the amounts of monounsaturated and n-3 fats. Canola is characterized by a low level of saturated fatty acids. It is also characterized by high level of monounsaturated fatty acids (viz. oleic acid and moderate level of n-3 fatty acids, in the form of alpha-linolenic acid. Clinical and epidemiological studies have shown that canola oil is one of the most desirable source of dietary fat in terms of human health.

W.M. Nimal Ratnayake

2004-01-01

283

Effects of reaction conditions on the structure of graft copolymer  

Energy Technology Data Exchange (ETDEWEB)

To advance the study of radiation graft copolymerization, we present the theory of coupling graft copolymerization and apply it to an investigation into the grafting of methylmethacrylate on to pre-irradiated polystyrene. (author).

Chen Xinfang; Chui Zhanchen; Li Min; Yiang Hui (Jilin Univ., Changchun, JL (China). Inst. of Material Science)

284

Effects of reaction conditions on the structure of graft copolymer  

International Nuclear Information System (INIS)

To advance the study of radiation graft copolymerization, we present the theory of coupling graft copolymerization and apply it to an investigation into the grafting of methylmethacrylate on to pre-irradiated polystyrene. (author)

1993-01-01

285

21 CFR 870.3450 - Vascular graft prosthesis.  

Science.gov (United States)

...2009-04-01 2009-04-01 false Vascular graft prosthesis. 870.3450 Section 870...Prosthetic Devices § 870.3450 Vascular graft prosthesis. (a) Identification. A vascular graft prosthesis is an implanted...

2009-04-01

286

Radiological findings in mammary autologous fat injections: A multi-technique evaluation  

International Nuclear Information System (INIS)

Aim: To describe the radiological appearance of normal and pathological findings resulting from mammary autologous fat injections (lipofilling). Materials and methods: Informed consent and institutional review board approval were obtained. From January 2008 to December 2010, all patients that had undergone breast lipofilling at our institution (Catholic University) were consecutively enrolled. The site and amount of autologous fat injections were known. Mammography, ultrasonography, and magnetic resonance imaging (MRI) were prospectively obtained preoperatively, and 6 and 12 months after the procedure. Normal and pathological findings were described. Results: Twenty-four patients (mean age 50.8 ± 10.5 years; range 26–70 years) were included. Fourteen patients underwent lipofilling after mastectomy, eight after wide local excision, one as a treatment for a congenital asymmetry, and one as a treatment for Poland syndrome. No severe complications were observed after treatment. Normal findings due to lipofilling (“oil cysts”) were identified in 23 cases using ultrasound and in 16 using MRI. Liponecrosis, the most frequently observed complication, was detected in four cases using ultrasound and in eight by MRI. In one case mammography showed calcific fat necrosis. Mean amount of fat injected was 114.8 ± 55 ml. The average amount of fat grafted in patients who developed liponecrosis was 158.4 ± 42.7 versus 104.6 ± 52.3 ml (p = 0.0043, t-test). In one case breast cancer recurrence was diagnosed. Conclusion: Normal findings due to lipofilling are better identified by ultrasound, and pathological findings are best identified using MRI. Liponecrosis most frequently occurs when large amounts of fat are injected. In the authors' experience lipofilling does not interfere with breast cancer early diagnosis.

2013-01-01

287

Design and development of multilayer vascular graft  

Science.gov (United States)

Vascular graft is a widely-used medical device for the treatment of vascular diseases such as atherosclerosis and aneurysm as well as for the use of vascular access and pediatric shunt, which are major causes of mortality and morbidity in this world. Dysfunction of vascular grafts often occurs, particularly for grafts with diameter less than 6mm, and is associated with the design of graft materials. Mechanical strength, compliance, permeability, endothelialization and availability are issues of most concern for vascular graft materials. To address these issues, we have designed a biodegradable, compliant graft made of hybrid multilayer by combining an intimal equivalent, electrospun heparin-impregnated poly-epsilon-caprolactone nanofibers, with a medial equivalent, a crosslinked collagen-chitosan-based gel scaffold. The intimal equivalent is designed to build mechanical strength and stability suitable for in vivo grafting and to prevent thrombosis. The medial equivalent is designed to serve as a scaffold for the activity of the smooth muscle cells important for vascular healing and regeneration. Our results have shown that genipin is a biocompatible crosslinker to enhance the mechanical properties of collagen-chitosan based scaffolds, and the degradation time and the activity of smooth muscle cells in the scaffold can be modulated by the crosslinking degree. For vascular grafting and regeneration in vivo, an important design parameter of the hybrid multilayer is the interface adhesion between the intimal and medial equivalents. With diametrically opposite affinities to water, delamination of the two layers occurs. Physical or chemical modification techniques were thus used to enhance the adhesion. Microscopic examination and graft-relevant functional characterizations have been performed to evaluate these techniques. Results from characterization of microstructure and functional properties, including burst strength, compliance, water permeability and suture strength, showed that the multilayer graft possessed properties mimicking those of native vessels. Achieving these FDA-required functional properties is essential because they play critical roles in graft performances in vivo such as thrombus formation, occlusion, healing, and bleeding. In addition, cell studies and animal studies have been performed on the multilayer graft. Our results show that the multilayer graft support mimetic vascular culture of cells and the acellular graft serves as an artery equivalent in vivo to sustain the physiological conditions and promote appropriate cellular activity. In conclusion, the newly-developed hybrid multilayer graft provides a proper balance of biomechanical and biochemical properties and demonstrates the potential for the use of vascular tissue engineering and regeneration.

Madhavan, Krishna

288

Improvement of polymer stability by radiation grafting  

International Nuclear Information System (INIS)

Losses of the stabilizer due to extractability or volatility immediately affect ultimate performance of polymer product. A new approach to increase the persistence of the stabilizer in the final product is to chemically bind it to the polymer backbone. Radiation grafting or crosslinking could be an efficient method for this, when the stabilizer is polymerizable. By a mutual gamma irradiation method, photoprotector 2-hydroxy-4-(3-methacryloxy-2- hydroxy-propoxy) benzophenone (HMB) has been readily grafted to low density polyethylene (LDPE) in benzene, tetrahydrofuran and methanol solution, respectively. Surface grafting occurs in a methanol solution of stabilizer, while in benzene and tetrahydrofuran solutions of stabilizer, grafting proceeds more or less in the inner parts of the polymeric film as well. The grafted LDPE film in methanol and tetrahydrofuran (containing 1 w/w % of grafted HMB), 1 w/w % blended HMB with LDPE and nongrafted LDPE film, were all exposed to accelerated aging and natural weathering and their spectral changes, expressed by the carbonyl index, were then compared. The change of elongation at break and tensile strength were measured in the course of aging. UV stability tests on aged films and change in mechanical properties indicate a pronounced protective effect achieved by grafted stabilizer. Grafting in methanol solution appears to be an efficient photostabilization treatment and the most economical with respect to the consumption of monomer, the grafting yield being less than 0.5%. Surface grafting is an efficient photostabilization method since grafted stabilizer is chemically bound to a polymeric surface and in this way the problem of evaporation of blended stabilizers during the prolonged use of polymeric materials is eliminated. (author)

1999-01-01

289

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352

Effect of grafting on grapevine chlorosis and hydraulic conductivity.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In a pot experiment the following grapevines were grown in a calcareous soil: Pinot blanc own-rooted and self-grafted, grafted on SO 4 and on 3309 C; SO 4 own-rooted, self-grafted and grafted on Pinot blanc; 3309 C own-rooted, self-grafted and grafted on Pinot blanc. The occurrence of chlorosis was strongly affected by graft combinations. In self-grafted 3309 C plants the specific conductivity was significantly reduced as compared to own-rooted ones. Own-rooted SO 4 plants showed the highest ...

Lovisolo, Claudio

2000-01-01

353

The effect of monomer molecular weight on grafting reaction  

International Nuclear Information System (INIS)

In this paper, some condensed ethylene glycol acrylate monomers with different molecular weight being grafted to the PE film by means of pre-irradiation is reported. The effect of molecular weight of monomer on grafting reaction and the hydrophilicity of grafting sample have been discussed. The experimental results show: molar degrees of grafting decreased non-linearly with the increasement of molecular weight of monomer, the grafting reaction of polymer is greater effected by the swelling degree of PE film, the greater the swelling degree of grafting material, the higher the grating degree grafting is, the initial rate of grafting reaction decreased with the increasement of molecular weight of monomer. (author)

1995-03-01

354

Gluteal fat thickness in pelvic CT  

Energy Technology Data Exchange (ETDEWEB)

Many calcifications due to fat necrosis in the buttocks detected on the pelvis roentgenograms suggest that the majority of injections intended to be intramuscular actually are delivered into fat. We measured thickness of adult gluteal fat to decide whether the injection using needle of usual length is done into fat or muscle. We measured the vertical thickness of the subcutaneous fat at a point of 2-3cm above the femoral head cut slice with randomly collected 116 cases of adults in the department of Radiology, St. Mary's Hospital, Catholic Medical College. We found that 32% female cases might actually receive on intra adipose injection when a needle of maximum 3.8cm length is inserted into the buttock. If deposition into muscle is desirable, we need to choose needle whose length is appropriate for the site of injection and the patient's deposits of fat.

Park, Jeong Mi; Jung, Se Young; Lee, Jae Mun; Park, Seog Hee; Kim, Choon Yul; Bahk, Yong Whee [Catholic Medical College, Seoul (Korea, Republic of)

1986-04-15

355

Pancreatic graft survival despite partial vascular graft thrombosis due to splenocephalic anastomoses.  

Science.gov (United States)

Thrombotic complications following pancreas transplantation are still the most common cause of nonimmunologic graft loss. The aim of this study was to analyze pancreatic graft function after partial arterial graft thrombosis and the investigation of the pancreatic arterial anatomy with regard to intraparenchymal anastomoses. We retrospectively analyzed the data for 175 consecutive pancreas transplants performed between January 2002 and October 2007. Selective Y-graft angiography was performed in 10 and rubber-milk injection in 5 fresh pancreas specimens. Thrombosis of one leg of the Y-graft was diagnosed in 18 (10.3%) patients. Only one of these patients with thrombosis of the splenic artery required exogenous insulin. Sufficient graft perfusion was demonstrated in all of the remaining grafts. One graft was lost due to acute rejection. In all specimens angiography showed an excellent perfusion of the pancreaticoduodenal arcade, even after selective cannulation of the splenic artery. Arterial collaterals between the gastroduodenal, splenic artery and the superior mesenteric artery were demonstrated. Our results demonstrate that global perfusion of the pancreatic graft and sufficient graft function is sustained after the thrombotic occlusion of one branch of the Y-graft by a complex system of intraparenchymal anastomoses. These anatomical findings may have consequences for resection strategies in pancreas surgery. PMID:20420640

Margreiter, C; Mark, W; Wiedemann, D; Sucher, R; Ollinger, R; Bösmüller, C; Freund, M; Maier, H T; Greiner, A; Fritsch, H; Pratschke, J; Margreiter, R; Aigner, F

2010-04-01

356

DSA and duplex ultrasonography in aorta grafts  

International Nuclear Information System (INIS)

In 95 patients with aorta grafts, DSA was compared with duplex ultrasonography. In 4 patients the graft was better visualized by means of angiography. Kinking, coiling, dilations, pseudoaneurysms, stenoses, and occlusions could be sufficiently diagnosed with both methods. Marginal thrombosis and periprosthetic pathologies could only be found with ultrasonographic and angiographic examination techniques are described and, the limitations of both methods discussed. (orig.)

1989-01-01

357

Biodiesel via hydrotreating of fat  

DEFF Research Database (Denmark)

Biodiesel production via transesterification to fatty acid alkyl esters is rising rapidly worldwide due to the limited availability of fossil resources and the problems of global warming. Often, however, the use of 2nd-generation feedstock like animal waste fat and trap greases etc. is made difficult especially by the high amount of free fatty acids (FFA) in these raw materials. Another way to utilise such feedstock could be through the complete deoxygenation of the fuel, i.e. by hydrogenation and decarboxylation of the fat itself. Hydrotreating of fats is a procedure very well suited for existing petroleum refineries, and could be applied in mixture with existing hydrotreating of for instance vacuum gas oil [1,2]. As is shown in literature, both hydrogenation and decarboxylation of the fat may occur under such circumstances [2-4]. 9 g of a model mixture of 3 % oleic acid (C18:1), 7 % tripalmitin (C16:0) and 90% n-tetradecane (C14) in molar ratios was hydrotreated by 0.2 g of a 5%wt Pt/Al2O3 catalyst. The mixture was treated with 10 to 30 bar H2 in an autoclave at temperatures between 250 and 375°C, and samples for GC analysis was taken out after 1, 2, 5 and 20 hours to track the extent of reaction. Thus, the yields of pentadecane (C15) to octadecane (C18) could be monitored by GC analysis, thus indicating the conversions of FFA and tripalmitin. This procedure makes it possible to monitor and distinguish hydrogenation (resulting in hexadecane, C16, and octadecane, C18) from decarboxylation (resulting in pentadecane, C15, and heptadecane, C17) of triglyceride and fatty acid. Even in this hydrogen-rich atmosphere, the dominant reaction above 300ºC is decarboxylation of the acid and ester functionalities, thus limiting the consumption of hydrogen. Temperatures below 300°C are not well suited for the treating, as primarily the saturation of oleic acid to stearic acid (C18:0) is observed, with low conversions of fatty acid and triglyceride. [1] Stumborg, M., Wong, A. and Hogan, E., Bioresour. Technol. 56 (1996) 13 [2] Huber, G.W., Oâ??Connor, P. and Corma, A., Appl. Catal. A. 329 (2007) 120 [3] Kubickova, I., SnÃ¥re, M., Eränen, K., Mäki-Arvela, P. and Murzin, D. Yu., Catal. Today, 106 (2005) 197 [4] Mäki-Arvela, P., Kubickova, I., SnÃ¥re, M., Eränen, K. and Murzin, D. Yu., Energy Fuels, 21 (2007) 31

Madsen, Anders Theilgaard; Ahmed, El Hadi

358

Fat Manifolds and Linear Connections  

CERN Multimedia

In this unique book, written in a reasonably self-contained manner, the theory of linear connections is systematically presented as a natural part of differential calculus over commutative algebras. This not only makes easy and natural numerous generalizations of the classical theory and reveals various new aspects of it, but also shows in a clear and transparent manner the intrinsic structure of the associated differential calculus. The notion of a “fat manifold” introduced here then allows the reader to build a well-working analogy of this “connection calculus” with the usual one.

De Paris, Alessandro

2008-01-01

359

Traumatic fat necrosis of male breast.  

Science.gov (United States)

Fat necrosis is a benign nonsuppurative inflammatory process that most commonly occurs in female breast. It is a rare condition in male breast. There are very few reports in the literature. There is a wide range of manifestations of fat necrosis and can mimic breast cancer clinically and radiologically. We report a case of fat necrosis of the breast in a 57-year-old man. PMID:23849832

Akyol, Muammer; Kayali, Alperen; Yildirim, Nezahat

2013-01-01

360

Radionuclide investigations of intestinal fat absorption  

International Nuclear Information System (INIS)

Analysis of the use of a simple and effective method for the assessment of intestinal fat absorption with the help of external radiometry of the abdominal area using a ?-radiation collimated detector and whole-body radiometry has shown that a coefficient of intestinal fat absorption in patients in the preoperative period does not demonstrate a statistically significant difference from the respective normal one. Gastrectomy with placing esophago-secal anastomosis disabling the duodenum, leads to considerable deterioration of fat absorptive function

1989-01-01

 
 
 
 
361

The stability of recombined milk fat globules.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The stability of the fat globules in recombined milk products against creaming, flocculation, clustering, partial coalescence and real coalescence, with the emphasis on partial coalescence, was studied. (partial) Coalescence was characterized by determining changes in globule size distribution and fat content. Without crystals the emulsions were mostly stable at rest and during flow. If crystals were present, natural cream and emulsions of milk fat-in-whey were unstable in a flow, while emuls...

1987-01-01

362

Nutritional and Health Effects of Dietary Fats  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In the 80`s and early 90`s, nutrition recommendations for the prevention of developing coronary heart disease called for a reduction of total fat in the diet through the substitution of carbohydrate for fat. However, the current scientific evidence does not support a position that a reduction in total fat has a beneficial effect on coronary heart disease, or risk factors for coronary heart disease. The cumulative evidence from recent scientific literature suggests that unless there is a conco...

Nimal Ratnayake, W. M.; Sarwar Gilani, G.

2004-01-01

363

Why does starvation make bones fat?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Body fat, or adipose tissue, is a crucial energetic buffer against starvation in humans and other mammals, and reserves of white adipose tissue (WAT) rise and fall in parallel with food intake. Much less is known about the function of bone marrow adipose tissue (BMAT), which are fat cells found in bone marrow. BMAT mass actually increases during starvation, even as other fat depots are being mobilized for energy. Here I review the possible reasons for this poorly understood phenomenon. Is BMA...

Devlin, Maureen J.

2011-01-01

364

Oil and fat in broiler nutrition  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The terms "fat" and "oil" refer to triglycerides of several profiles of fatty acids. Fatty acids that are not bound to other organic components as glycerol are the so-called free fatty acids. Lipids constitute the main energetic source for animals and they have the highest caloric value among all the nutrients. Linoleic acid is the only fatty acid whose dietetic requirement has been demonstrated. Besides supplying energy, the addition of fat to animal diets improves the absorption of fat-solu...

Nc, Baia?o; Ljc, Lara

2005-01-01

365

Ant fat extraction with a Soxhlet extractor.  

Science.gov (United States)

Stored fat can be informative about the relative age of an ant, its nutritional status, and the nutritional status of the colony. Several methods are available for the quantification of stored fat. Before starting a project involving fat extraction, investigators should weigh the advantages and disadvantages of different methods in order to choose the one that is best suited to the question being addressed. This protocol, although not as accurate as some alternatives, facilitates the rapid quantification of many individuals. PMID:20147208

Smith, Chris R; Tschinkel, Walter R

2009-07-01

366

Cartilage grafts for the nasal tip.  

Science.gov (United States)

Control over nasal tip projection is essential in rhinoplasty. Nasal projection is defined as the length of the perpendicular drawn from the anterior facial plane to the tip-defining point. The nasal lobule shield-type graft, made of autologous cartilage, is one of the most important methods to maintain projection. The graft may also control length, (counter)rotation of the nose and refinement of the tip. The external approach facilitates in-situ suturing and sculpting of the graft. Between 1989 and 1991, 300 patients underwent an external rhinoplasty. In 94 (31%) an autologous graft for the nasal tip was used. The aesthetic result was pleasing to the vast majority of the patients. Nasal tip rigidity resolved in all patients within one year post-operatively. One patient needed revision surgery, because of graft resorption. PMID:8877218

Zijlker, T D; Vuyk, H

1993-12-01

367

Graft healing in anterior cruciate ligament reconstruction  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Successful anterior cruciate ligament reconstruction with a tendon graft necessitates solid healing of the tendon graft in the bone tunnel. Improvement of graft healing to bone is crucial for facilitating an early and aggressive rehabilitation and ensuring rapid return to pre-injury levels activity. Tendon graft healing in a bone tunnel requires bone ingrowth into the tendon. Indirect Sharpey fiber formation and direct fibrocartilage fixation confer different anchorage strength and interface properties at the tendon-bone interface. For enhancing tendon graft-to-bone healing, we introduce a strategy that includes the use of periosteum, hydrogel supplemented with periosteal progenitor cells and bone morphogenetic protein-2, and a periosteal progenitor cell sheet. Future studies include the use of cytokines, gene therapy, stem cells, platelet-rich plasma, and mechanical stress for tendon-to-bone healing. These strategies are currently under investigation, and will be applied in the clinical setting in the near future.

Chen Chih-Hwa

2009-09-01

368

Graft transformation in tobacco (Nicotiana tabacum)  

International Nuclear Information System (INIS)

Full text: We have obtained various graft-induced changes and clarified the genetic nature mainly in solanaceous plants, such as red pepper, eggplant, tomato and in soybean. From the similarity of genetic behaviour of the graft-induced changes with that of DNA-mediated transformation in higher organisms, we speculate transformational matter as a probable mechanism of the graft-induced change. In order to check the relationship between transformation and graft-induced change, a graft experiment was performed, in which the transgenic tobacco plant having bacterial KmR gene closely linked with Nos gene was used as stock plant. The genetic behaviour and fate of the bacterial genes derived from the stock plant were pursued in the progenies from the scion capsules of normal tobacco. (author)

1990-01-01

369

Separators of fat points in multiprojective spaces  

CERN Document Server

Let Z be a set of fat points in a multiprojective space. We introduce definitions for the separator of a fat point and the degree of a fat point in this context, and we study some of their properties. Our definition has been picked so that when we specialize to the cases: (a) Z is a reduced set of points in P^n; (b) Z is a set of fat points in P^n; or (c) Z is a reduced set of points in P^n1 x ... x P^nr, we are consistent with previous definitions and results of Orecchia, Marino, and the authors.

Guardo, Elena

2009-01-01

370

Fat 4-polytopes and fatter 3-spheres  

CERN Document Server

We introduce the fatness parameter of a 4-dimensional polytope P, defined as \\phi(P):=(f_1+f_2)/(f_0+f_3). It arises in an important open problem in 4-dimensional combinatorial geometry: Is the fatness of convex 4-polytopes bounded? We describe and analyze a hyperbolic geometry construction that produces 4-polytopes with fatness \\phi(P)> 5.048, as well as the first infinite family of 2-simple, 2-simplicial 4-polytopes. Moreover, using a construction via finite covering spaces of surfaces, we show that fatness is not bounded for the more general class of strongly regular CW decompositions of the 3-sphere.

Eppstein, D; Ziegler, Günther M; Eppstein, David; Kuperberg, Greg

2002-01-01

371

Authentication of feeding fats: Classification of animal fats, fish oils and recycled cooking oils  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Classification of fats and oils involves the recognition of one/several markers typical of the product. The ideal marker(s) should be specific to the fat or oil. Not many chemical markers fulfill these criteria. Authenticity assessment is a difficult task, which in most cases requires the measurement of several markers and must take into account natural and technology-induced variation. The present study focuses on the identity prediction of three by-products of the fat industry (animal fats,...

Ruth, S. M.; Rozijn, M.; Koot, A. H.; Perez-garcia, R.; Kamp, H. J.; Codony, R.

2010-01-01

372

Function and cancer genomics of FAT family genes  

Digital Repository Infrastructure Vision for European Research (DRIVER)

FAT1, FAT2, FAT3 and FAT4 are human homologs of Drosophila Fat, which is involved in tumor suppression and planar cell polarity (PCP). FAT1 and FAT4 undergo the first proteolytic cleavage by Furin and are predicted to undergo the second cleavage by ?-secretase to release intracellular domain (ICD). Ena/VAPS-binding to FAT1 induces actin polymerization at lamellipodia and filopodia to promote cell migration, while Scribble-binding to FAT1 induces phosphorylation and functional inhibition of Y...

Katoh, Masaru

2012-01-01

373

Correction of short nose deformity using a septal extension graft combined with a derotation graft.  

Science.gov (United States)

In patients having a short nose with a short septal length and/or severe columellar retraction, a septal extension graft is a good solution, as it allows the dome to move caudally and pushes down the columellar base. Fixing the medial crura of the alar cartilages to a septal extension graft leads to an uncomfortably rigid nasal tip and columella, and results in unnatural facial animation. Further, because of the relatively small and weak septal cartilage in the East Asian population, undercorrection of a short nose is not uncommon. To overcome these shortcomings, we have used the septal extension graft combined with a derotation graft. Among 113 patients who underwent the combined procedure, 82 patients had a short nose deformity alone; the remaining 31 patients had a short nose with columellar retraction. Thirty-two patients complained of nasal tip stiffness caused by a septal extension graft from previous operations. In addition to the septal extension graft, a derotation graft was used for bridging the gap between the alar cartilages and the septal extension graft for tip lengthening. Satisfactory results were obtained in 102 (90%) patients. Eleven (10%) patients required revision surgery. This combination method is a good surgical option for patients who have a short nose with small septal cartilages and do not have sufficient cartilage for tip lengthening by using a septal extension graft alone. It can also overcome the postoperative nasal tip rigidity of a septal extension graft. PMID:24511489

Paik, Moo Hyun; Chu, Lo Shui

2014-01-01

374

Graft irradiation abrogates graft-versus-host disease in combined pancreas-spleen transplantation  

International Nuclear Information System (INIS)

A model of combined pancreas-spleen transplantation (PST) was studied in LBN F1 recipients of Lewis grafts in order to evaluate the efficacy of pretransplant graft irradiation in preventing lethal graft-versus-host disease (GVHD). Recipients of unmodified PST uniformly developed severe GVHD and died (MST = 16.7 +/- 3.8 days). Whole body donor irradiation with either 500 or 250 rad prevented lethal GVHD. Similarly, ex vivo graft irradiation with either 1000 or 500 rad also resulted in normal weight gain, graft function, and host survival for the 6-week study period. Conversely, delay of graft irradiation until 3 days after transplantation failed to prevent this complication (MST = 15.8 +/- 3.7 days). Recipients of irradiated grafts displayed glucose tolerance tests that were identical to those in the control group indicating that the doses of radiation employed in these experiments were not deleterious to islet function. Irradiated spleen grafts appeared histologically normal at 6 weeks after transplantation. Cells derived from these grafts failed to stimulate lymph node enlargement in a popliteal lymph node assay for GVHD, suggesting that these spleens may have become repopulated with host cells. These experiments confirm that PST has the potential to cause lethal GVHD and suggest that pretransplant graft irradiation may be used to prevent its occurrence

1986-01-01

375

Milk fat thermal properties and solid fat content in emmental cheese: a differential scanning calorimetry study.  

Science.gov (United States)

The experiments reported in this study give deeper insight into the crystallization of milk fat in Emmental cheese, which is the most widely consumed hard cheese in France. Differential scanning calorimetry (DSC) was used to monitor the thermal properties of milk fat after the main stages involved during manufacture of Emmental cheese. By heating the samples to 60 degrees C to eliminate their thermal history and cooling them at 2 degrees C/min, the liquid --> solid phase transition of fat was investigated. Confocal laser scanning microscopy was used to characterize in situ the supramolecular organization of milk fat dispersed in the casein matrix. The destabilization of fat globules by aggregation or coalescence and the formation of free fat during the manufacture altered the thermal properties of milk fat by increasing the initial temperature of crystallization and by the formation of 2 overlapping exotherms. The melting properties of the crystalline structures formed by fat at the temperatures used for ripening (12, 21, and 4 degrees C) were examined. Differential scanning calorimetry was used to determine the ratio of solid to liquid fat; that is, the amount of fat that is crystallized, by dividing the partial enthalpy of melting of the fat for ripening temperature by the total enthalpy of melting of the same fat extracted from cheese. This study shows, for the first time, that milk fat is partially crystallized in Emmental cheese: about 55.7 +/- 3.5% of fat is solid at 4 degrees C at the end of ripening. Polymorphic phase transitions of milk fat are also suggested during ripening of Emmental cheese. PMID:16840605

Lopez, C; Briard-Bion, V; Camier, B; Gassi, J-Y

2006-08-01

376

Adaptive significance of root grafting in trees  

Energy Technology Data Exchange (ETDEWEB)

Root grafting has long been observed in forest trees but the adaptive significance of this trait has not been fully explained. Various authors have proposed that root grafting between trees contributes to mechanical support by linking adjacent root systems. Keeley proposes that this trait would be of greatest advantage in swamps where soils provide poor mechanical support. He provides as evidence a greenhouse study of Nyssa sylvatica Marsh in which seedlings of swamp provenance formed between-individual root grafts more frequently than upland provenance seedlings. In agreement with this within-species study, Keeley observed that arid zone species rarely exhibit grafts. Keeley also demonstrated that vines graft less commonly than trees, and herbs never do. Since the need for mechanical support coincides with this trend, these data seem to support his model. In this paper, the authors explore the mechanisms and ecological significance of root grafting, leading to predictions of root grafting incidence. Some observations support and some contradict the mechanical support hypothesis.

Loehle, C.; Jones, R.

1988-12-31

377

Bioelectrical impedance analysis of bovine milk fat  

International Nuclear Information System (INIS)

Three samples of 250ml at home temperature of 20°C were obtained from whole, low fat and fat free bovine UHT milk. They were analysed by measuring both impedance spectra and dc conductivity in order to establish the relationship between samples related to fat content. An impedance measuring system was developed, which is based on digital oscilloscope, a current source and a FPGA. Data was measured by the oscilloscope in the frequency 1 kHz to 100 kHz. It was showed that there is approximately 7.9% difference in the conductivity between whole and low fat milk whereas 15.9% between low fat and free fat one. The change of fatness in the milk can be significantly sensed by both impedance spectra measurements and dc conductivity. This result might be useful for detecting fat content of milk in a very simple way and also may help the development of sensors for measuring milk quality, as for example the detection of mastitis.

2012-12-20

378

Bioactive polymer grafting onto titanium alloy surfaces.  

Science.gov (United States)

Bioactive polymers bearing sulfonate (styrene sodium sulfonate, NaSS) and carboxylate (methylacrylic acid, MA) groups were grafted onto Ti6Al4V alloy surfaces by a two-step procedure. The Ti alloy surfaces were first chemically oxidized in a piranha solution and then directly subjected to radical polymerization at 70 degrees C in the absence of oxygen. The grafted surfaces were characterized by X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and the toluidine blue colorimetric method. Toluidine blue results showed 1-5microgcm(-2) of polymer was grafted onto the oxidized Ti surfaces. Grafting resulted in a decrease in the XPS Ti and O signals from the underlying Ti substrate and a corresponding increase in the XPS C and S signals from the polymer layer. The ToF-SIMS intensities of the S(-) and SO(-) ions correlated linearly with the XPS atomic percent S concentrations and the ToF-SIMS intensity of the TiO(3)H(2)(-) ion correlated linearly with the XPS atomic per cent Ti concentration. Thus, the ToF-SIMS S(-), SO(-) and TiO(3)H(2)(-) intensities can be used to quantify the composition and amount of grafted polymer. ToF-SIMS also detected ions that were more characteristic of the polymer molecular structure (C(6)H(4)SO(3)(-) and C(8)H(7)SO(3)(-) from NaSS, C(4)H(5)O(2)(-) from MA), but the intensity of these peaks depended on the polymer thickness and composition. An in vitro cell culture test was carried out with human osteoblast-like cells to assess the influence of the grafted polymers on cell response. Cell adhesion after 30min of incubation showed significant differences between the grafted and ungrafted surfaces. The NaSS grafted surfaces showed the highest degree of cell adhesion while the MA-NaSS grafted surfaces showed the lowest degree of cell adhesion. After 4 weeks in vivo in rabbit femoral bones, bone was observed to be in direct contact with all implants. The percentage of mineralized tissue around the implants was similar for NaSS grafted and non-grafted implants (59% and 57%). The MA-NaSS grafted implant exhibited a lower amount of mineralized tissue (47%). PMID:19733698

Michiardi, A; Hélary, G; Nguyen, P-C T; Gamble, L J; Anagnostou, F; Castner, D G; Migonney, V

2010-02-01

379

Graft polymerization produced by ionizing radiation  

International Nuclear Information System (INIS)

Radiation-induced graft polymerization has developed as an independent discipline with its own methodology to deal with a wide range of practical tasks relating to the general problem of producing materials with given combinations of properties. The various aspects of this discipline are the grafting techniques, the regularities and mechanisms involved, the structures and properties of the materials, and aspects of implementing radiation grafting under engineering conditions. This paper characterizes the general history of this line and the current state of the art; only the key aspects are considered

1986-01-01

380

Graft polymerization produced by ionizing radiation  

Energy Technology Data Exchange (ETDEWEB)

Radiation-induced graft polymerization has developed as an independent discipline with its own methodology to deal with a wide range of practical tasks relating to the general problem of producing materials with given combinations of properties. The various aspects of this discipline are the grafting techniques, the regularities and mechanisms involved, the structures and properties of the materials, and aspects of implementing radiation grafting under engineering conditions. This paper characterizes the general history of this line and the current state of the art; only the key aspects are considered.

Tsetlin, B.L.; Babkin, I.Y.; Kabanov, V.Y.; Ponomarev, A.N.

1986-01-01

 
 
 
 
381

Use of Grafts in Pelvic Reconstructive Surgery  

Digital Repository Infrastructure Vision for European Research (DRIVER)

There has been growing interest in the use of grafts in pelvic reconstructive surgery. This article will address available graft materials and assess their clinical efficacy and safety. We conducted a Pubmed MEDLINE literature search for full-length English text studies with follow-up periods of at least one year. There are many reports on synthetic and biological graft materials; the majority are not well-designed, have short-term follow-up, small sample sizes, and poor outcome assessment. T...

2007-01-01

382

[Vascular grafts as access for hemodialysis].  

Science.gov (United States)

Prosthetic arteriovenous grafts have an inferior patency rate and greater morbidity than those with autogenous vessels and are therefore considered as secondary or tertiary vascular access for hemodialysis in patients with fatigued or unsuitable superficial arm veins. Prior access planning in accordance of patient characteristics, careful operative procedure and appropriate revision of complications can ensure long-term functioning of a vascular access using a large variety of possible prosthetic conduits. Arteriovenous grafts remain essential in vascular access surgery and their role may be increasing with higher comorbidities of patients and should be preferred to tunnelled cuffed catheters. This article reviews the indications, alternative configurations and characteristics of arteriovenous grafts. PMID:22930063

Zanow, J; Settmacher, U

2012-09-01

383

A fat gluino in disguise  

Energy Technology Data Exchange (ETDEWEB)

In this paper, we investigate how a sizeable width-to-mass ratio for a gluino, as is for example realized in GMSB scenarios, could affect the discovery potential of gluinos at the LHC. More importantly, the influence of the gluino being ''fat'' on the standard mass and spin determination methods at the LHC are investigated. For this purpose, we focus on gluino production at the LHC, where we do not factorize the first step in the gluino decay cascade, but treat the following decay cascades step in factorization, including full spin correlations. The effects of sizeable width-to-mass ratios from a few up to 15-20 per cent on the endpoint of several mass determination methods as well as on means for discrimination between BSM spin paradigms like SUSY and UED are studied.

Reuter, J.; Wiesler, D.

2012-12-15

384

A fat gluino in disguise  

International Nuclear Information System (INIS)

In this paper, we investigate how a sizeable width-to-mass ratio for a gluino, as is for example realized in GMSB scenarios, could affect the discovery potential of gluinos at the LHC. More importantly, the influence of the gluino being ''fat'' on the standard mass and spin determination methods at the LHC are investigated. For this purpose, we focus on gluino production at the LHC, where we do not factorize the first step in the gluino decay cascade, but treat the following decay cascades step in factorization, including full spin correlations. The effects of sizeable width-to-mass ratios from a few up to 15-20 per cent on the endpoint of several mass determination methods as well as on means for discrimination between BSM spin paradigms like SUSY and UED are studied.

2012-01-01

385

Dynamical Fermions with Fat Links  

CERN Document Server

We present and test a new method for simulating dynamical fermions with fat links. Our construction is based on the introduction of auxiliary but dynamical gauge fields and works with any fermionic action and can be combined with any fermionic updating. In our simulation we use an over-relaxation step which makes it effective. For four flavors of staggered fermions first results indicate that flavor symmetry at a lattice spacing a~0.2 fm is restored to a few percent. With the standard action this amount of flavor symmetry restoration is achieved at a~0.07 fm. We estimate that the overall computational cost is reduced by at least a factor 10.

Knechtli, F

2001-01-01

386

A Fat Gluino in Disguise  

CERN Multimedia

In this paper, we investigate how a sizeable width-to-mass ratio for a gluino, as is for example realized in GMSB scenarios, could affect the discovery potential of gluinos at the LHC. More importantly, the influence of the gluino being "fat" on the standard mass and spin determination methods at the LHC are investigated. For this purpose, we focus on gluino production at the LHC, where we do not factorize the first step in the gluino decay cascade, but treat the following decay cascades step in factorization, including full spin correlations. The effects of sizeable width-to-mass ratios from a few up to 15-20 per cent on the endpoint of several mass determination methods as well as on means for discrimination between BSM spin paradigms like SUSY and UED are studied.

Reuter, J

2012-01-01

387

Sensory and physical properties of ice creams containing milk fat or fat replacers.  

Science.gov (United States)

The purpose of this research was to determine the relative effects of milk fat, nonfat milk solids, or each of three whey protein type fat replacers on the flavor and texture attributes of vanillin-flavored ice cream. Descriptive sensory analyses disclosed that ice creams containing 4.8% of any of the fat replacers in place of milk fat had no demonstrable effect on vanillin flavor but increased the intensities of whey flavor, syrup flavor, and cooked milk flavor. Compared with each substitute, milk fat significantly reduced the syrup, whey, and cooked milk flavors and increased the fresh milk and cream flavors of the ice cream. Results emphasized the importance of fat as a flavor modifier and the importance of certain fat replacers as aids in improving texture. PMID:9621223

Ohmes, R L; Marshall, R T; Heymann, H

1998-05-01

388

Fat avoidance and replacement behaviors predict low-fat intake among urban African American adolescents.  

Science.gov (United States)

Using measures of behaviors shown to predict low-fat intake in previous research, this study examined whether the behaviors would predict low-fat intake among urban African American adolescents. Recruited through youth services agencies in Philadelphia, Pa, participants were 399 African American adolescents (67% female subjects) with a mean age of 13.09 years (range, 10-15 years). Fat-related dietary behaviors were measured using items that were adapted from the Food Habits Questionnaire. Fat intake was measured using the Block Fat Screener. Spearman correlations examined the relationships between fat-related dietary behaviors and fat intake. Seven behaviors were significantly associated with low-fat intake: had chicken that was baked or broiled instead of fried; ordered pasta or pizza served without meat sauce or meat toppings; had a vegetarian dinner; used low-calorie instead of regular salad dressing; ate at least 2 vegetables (not green salad) at dinner; ate bread, rolls, or muffins without butter or margarine; and avoided foods that were fried in oil, shortening, or lard. Using multiple regression, fat intake was regressed on the linear combination of demographic variables and these fat-related dietary behaviors. The regression equation accounted for 17% of the variance in fat intake (adjusted R(2) = 0.13). Fat avoidance (ate bread, rolls, or muffins without butter or margarine) and replacement (ordered pasta or pizza served without meat sauce or meat toppings) behaviors were significant predictors of low-fat intake. Dietary interventions to lower fat intake among urban African American adolescents should promote the adoption of these behaviors. PMID:19083432

Di Noia, Jennifer; Contento, Isobel R; Schinke, Steven P

2008-06-01

389

Study on preirradiation grafting of methacrylamide onto natural silk fabrics  

International Nuclear Information System (INIS)

In order to improve the properties of natural silk fabrics, the mechanism and method of the radiation induced graft copolymerization of monomers onto natural silk fabrics were more studied. Grafting of methacrylamide onto natural silk fabrics by the preirradiation grafting method have been made. The dependencies of the grafting yield on preirradiation dose, dose rates, grafting reaction time, monomers content and moisture in sample were investigated respectively. The mechanism of the preirradiation grafting was discussed. The comparison of the preirradiation grafting method with the radiation-induced solid phase graft copolymerization was made. It is evident that the preirradiation grafting method has many advantages. It can carry out surface layer graft of monomer onto natural silk fabrics. The printing and dyeing performance was improved and so on. (5 refs., 5 figs., 1 tab.)

1997-01-01

390

Role of graft oversizing in the fixation strength of barbed endovascular grafts  

Science.gov (United States)

Purpose The role of endovascular graft oversizing on risk of distal graft migration following endovascular aneurysm repair for abdominal aortic aneurysm is poorly understood. A controlled in vitro investigation of the role of oversizing in graft-aorta attachment strength for EVGs with barbs was performed. Methods Barbed stent grafts (N=20) with controlled graft oversizing varying from 4 to 45% were fabricated while maintaining other design variables unchanged. A flow loop with physiological flow characteristics and a biosynthetic aortic aneurysm phantom (synthetic aneurysm model with a bovine aortic neck) were developed. The stent grafts were deployed into the aortic neck of the bio-synthetic aortic aneurysm phantom under realistic flow conditions. Computed tomography imaging of the graft-aorta complex was used to document attachment characteristics such as graft apposition, number of barbs penetrated, penetration depth and angle. The strength of graft attachment to the aortic neck was assessed using mechanical pull out testing. Stent grafts were categorized into four groups based on oversizing: 4–10%; 11–20%; 21–30%; and greater than 30% oversizing. Results Pullout force, a measure of post-deployment fixation strength was not different between 4–10% (6.23 ±1.90 N), 11–20% (6.25 ±1.84 N) and 20–30% (5.85 ±1.89 N) groups, but significantly lower for the group with greater than 30% oversizing (3.67±1.41 N). Increasing oversizing caused a proportional decrease in the number of barbs penetrating the aortic wall (correlation = ?0.83). Of the 14 barbs available in the stent graft, 89% of the barbs (12.5 of 14 on average) penetrated the aortic wall in the 4–10% oversizing group while only 38% (5.25 of 14) did for the greater than 30% group (pBarbed stent grafts with excessive oversizing are likely to result in poor fixation and increased risk of migration.

Kratzberg, Jarin A.; Golzarian, Jafar; Raghavan, Madhavan L.

2009-01-01

391

Body Fat, Abdominal Fat, and Body Fat Distribution Is Related to Left Atrial Diameter in Young Children  

DEFF Research Database (Denmark)

In adults, the size of the left atria (LA) has important prognostic information. In obese adults, adolescents and children enlargement of LA have been observed. This has not been investigated on a population-based level in young children. We therefore assessed if total body fat mass (TBF), abdominal fat, and body fat distribution were related to LA diameter. Cross-sectional study of 244 children (boys = 137 and girls n = 107) aged 8-11 years, recruited from an urban population-based cohort. Dual-energy X-ray absorptiometry (DXA) measured total lean body mass, TBF, and abdominal fat mass (AFM). Body fat was also calculated as a percentage of body mass (BF%). Body fat distribution (AFM/TBF) was calculated. Echocardiography was performed with two-dimensional guided M-mode. LA diameter was measured and left ventricular mass (LVM) was calculated. Systolic blood pressure and diastolic blood pressure were measured and maturity assessed according to Tanner. There were significant (P <0.05) univariate correlations forall children between TBF (r = 0.40), BF% (r = 0.32), AFM (r = 0.41), and AFM/TBF (r = 0.41) vs. LA diameter. Multiple regression analyses with the inclusion of possible confounders such as lean body mass, blood pressure, gender, age, and Tanner stage revealed that TBF, AFM, and AFM/TBF were all independently related to LA diameter. Differences in the different body fat measurements explained 6-9% of the variance in LA size. These results demonstrated that both total body fat, AFM, and body fat distribution are already at a young age negatively and independently associated to LA diameter.

Dencker, Magnus; Thorsson, Ola

2012-01-01

392

Graft Rejection and Graft Failure After Penetrating Keratoplasty or Posterior Lamellar Keratoplasty for Fuchs Endothelial Dystrophy  

DEFF Research Database (Denmark)

PURPOSE:: To compare the frequency of rejection episodes and graft failure because of surgical complications or rejection after Descemet stripping automated endothelial keratoplasty (DSAEK) and penetrating keratoplasty (PK) for Fuchs endothelial dystrophy. METHODS:: A total of 201 eyes of 201 consecutive patients with Fuchs endothelial dystrophy undergoing keratoplasty were included. One hundred two patients underwent DSAEK and 99 PK in the period January 1, 2000, to December 31, 2010. Postoperative topical steroid treatment was similar in the 2 groups. Most patients in the PK group received a short course of oral prednisolone, which was not prescribed for patients undergoing DSAEK. Patient records were retrospectively reviewed; rejection episodes and causes of graft failures were recorded, and Kaplan-Meier survival curves up to 5 years after surgery were computed and compared. RESULTS:: All rejection episodes and most graft failures occurred during the first 2 years after surgery. In this period, rejection episodes were noted in 16% of PK and in 5% of DSAEK-treated eyes (P = 0.03). During the first 5 years, significantly more DSAEK grafts than PK grafts had failed (P = 0.04) but only 2 PK-treated and no DSAEK-treated grafts failed because of rejection. CONCLUSION:: The frequency of graft rejection episodes is higher after PK than DSAEK for primary endothelial disease, despite the use of oral prednisolone in the PK group. Early graft failure is more common after DSAEK than after PK, whereas graft failure because of previous rejection episodes is uncommon after DSAEK and PK.

Hjortdal, Jesper; Pedersen, Iben B

2013-01-01

393

Grafting of Methacrylonitrile and Ethyl Methacrylate onto Jute Fibre: Physico-chemical Characteristics of Grafted Jute  

Directory of Open Access Journals (Sweden)

Full Text Available Modification of bleached jute fibre was done by graft co-polymerization with vinyl monomers e.g. methacrylonitrile and ethyl methacrylate, in aqueous medium using H2O2-Na2S2O3 as redox initiators. To make the process efficient, the optimized polymerization condition was established. The maximum percent grafting and grafting efficiency obtained at optimum grafting condition were 11.3 and 20.4% for MAN, respectively and that of 17.6 and 27.5% for EMA. Modification of bleached jute fibre with MAN and EMA reduced the loss in breaking strength and the yellowing on exposure to sunlight in air.

Md. Ibrahim H. Mondal

2005-01-01

394

MICELLIZATION BEHAVIOR COMPARISION OF POLYPEPTIDE GRAFT COPOLYMER AND BLOCK-GRAFT COPOLYMER IN ETHANOL  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Poly(ethylene glycol)-block-poly(?-benzyl L-glutamate)-graft-poly(ethylene glycol) (PEG-b-PBLG-g-PEG) copolymer and poly(?-benzyl L-glutamate)-graft-poly(ethylene glycol) (PBLG-graft-PEG) copolymer were synthesized by the ester exchange reaction of PEG chain with PBLG-block-PEG copolymer and PBLG homopolymer, respectively. The micellization behaviors of PEG-b-PBLG-g-PEG and PBLG-graft-PEG in ethanol were investigated by transmission electron microscopy (TEM) and viscometry. Effects ...

GUO-QUAN ZHU

2010-01-01

395

Pinch grafting for chronic venous leg ulcers in general practice  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Twenty-five patients with chronic venous leg ulcers were treated in general practice by pinch grafting. Fifteen of the ulcers (60%) were completely healed one year after grafting. Prior to grafting 19 patients (76%) complained of daily pain in the ulcer. These patients experienced complete relief from pain after grafting. Pinch grafting is a simple, safe and effective therapy when applied in a domiciliary environment.

Steele, Keith

1985-01-01

396

Aneurysms and pseudoaneurysms of saphenous vein coronary artery bypass grafts  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Aneurysms of saphenous vein grafts to coronary arteries are unusual complications of coronary artery bypass graft (CABG) surgery. Three patients (men aged 47, 62, and 68 years) are presented with spontaneous chest pains 10, 21, and 17 years after CABG surgery. In one case, the saphenous vein graft had eroded into the right atrium and had established a fistula between the graft and the right atrium. Diagnosis of saphenous vein graft aneurysms was confirmed by echocardiography, computed t...

Le Breton, H.; Pavin, D.; Langanay, T.; Roland, Y.; Leclercq, C.; Beliard, J.; Bedossa, M.; Rioux, C.; Pony, J.

1998-01-01

397

Grafting of different European beech (Fagus sylvatica L.) cultivars  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The survey was conducted in 2008 on the European beech (Fagus sylvatica L.) at the Faculty of Agriculture and Life Sciences, University of Maribor. We grafted four different cultivars: 'Pendula', 'Atropunica', 'Zlatia' and 'Tricolor'. The grafting took place in the spring using bench grafting approach combined with side wedge grafting technique. We investigated the impact of different cultivars on the success of grafting. For each cultivar we analysed the impact of rootstock thickness, lengt...

2010-01-01

398

An introduction to the septal extension graft.  

Science.gov (United States)

The septal extension graft is a very useful method of controlling nasal lengthening and tip projection, rotation, and shape by fixing a graft to the septum, which leads to a strong supporting structure. Enhancing graft stability is important for better long-term outcomes and minimizing complications or relapse, and even more efficient application of these methods is needed for East Asians who lack enough cartilage to be harvested in addition to possessing a weak cartilage framework. In this paper, the methods for overcoming the drawbacks of the septal extension graft, such as instability, a fixed tip, and insufficiency of cartilage, are presented, and the applications of each method for greater satisfaction with surgical outcomes are also discussed. PMID:24511491

Kim, Myung-Hoon; Choi, Jeong-Hwan; Kim, Min-Su; Kim, Seok-Kwun; Lee, Keun-Cheol

2014-01-01

399

CT diagnosis of aortic graft infections  

Energy Technology Data Exchange (ETDEWEB)

Two cases of aortic graft infections diagnosed by computed tomography (CT) are presented. CT scans demonstrated a zone of low attenuation in the perigraft area, in one case with a rim enhancement. The diagnoses were verfied by operation.

Allgayer, B.; Ries, G.; Feuerbach, S.; Reiser, M.

1982-02-01

400

Radiation-induced grafting onto wool  

International Nuclear Information System (INIS)

Radiation-induced grafting tests were done on single wool fibres. Different vinyl monomers were used for this purpose and they were grafted in twenty different solvents which were selected for their swelling effiency and solvent parameters. The tests were done once with and once without the addition of water. The presence of water causes the polymer uptake to increase considerably. Formic acid/methanol and methanol were found to be the most suitable solvent systems, as they have the highest hydrogen-bond interaction effiency. The moisture uptake of wool depends on the hydrophily and hydrophoby of the grafted polymers. The single-fibre tests serve as a basis for analogous grafting tests on wool fabrics. The permanent- press was improved by graftng with hydrophoric polymers and polymers with a high glass-transition temperature

1979-01-01

 
 
 
 
401

Meso-Caval Autogenous Vein Graft Shants.  

Science.gov (United States)

The authors review 14 cases of superior mesenteric vein-inferior vena caval autogenous graft shunting operations for portal hypertension with bleeding esophageal varices due exclusively to late schistosomiasis with splenectomy performed 6-13 years previou...

J. Qingfeng C. Yongyin

1980-01-01

402

Surface Grafting of Thermoresponsive Microgel Nanoparticles (Postprint).  

Science.gov (United States)

A monolayer of thermoresponsive microgel nanoparticles, containing poly(N-isopropylacrylamide) (PNIPAM), has been anchored to the surface of silicon wafers, glass slides, polyvinylidene fluoride (PVDF) fibers, and tungsten wires using a 'grafting to' appr...

B. Zdyrko C. Tsai M. Seeber R. Burtovvy T. Andrukh

2011-01-01

403

Primary Graft Failure after Heart Transplantation  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Primary graft failure (PGF) is a devastating complication that occurs in the immediate postoperative period following heart transplantation. It manifests as severe ventricular dysfunction of the donor graft and carries significant mortality and morbidity. In the last decade, advances in pharmacological treatment and mechanical circulatory support have improved the outlook for heart transplant recipients who develop this complication. Despite these advances in treatment, PGF is still the leadi...

Arjun Iyer; Gayathri Kumarasinghe; Mark Hicks; Alasdair Watson; Ling Gao; Aoife Doyle; Anne Keogh; Eugene Kotlyar; Christopher Hayward; Kumud Dhital; Emily Granger; Paul Jansz; Roger Pye; Phillip Spratt; Peter Simon Macdonald

2011-01-01

404

The grafting map of Teichmüller space  

CERN Document Server

Grafting is a method of obtaining new projective structures from a hyperbolic structure, basically by gluing a flat cylinder into a surface along a closed geodesic in the hyperbolic structure, or by limits of that procedure. This induces a map of Teichmuller space to itself. We prove that this map is a homeomorphism by analyzing harmonic maps between pairs of grafted surfaces. As a corollary we obtain bending coordinates for the Bers embedding of Teichmuller space.

Scannell, K P; Scannell, Kevin P.; Wolf, Michael

1998-01-01

405

Fusarium incarnatum/equiseti hemodialysis graft infection  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Hemodialysis graft infections typically occur as a result of contamination by skin flora at the time of insertion or become secondarily infected after high-grade bacteremia. Infection of implanted vascular devices with filamentous fungi is rare. We report a case of infection of an implanted polytetrafluoroethylene dialysis graft with Fusarium incarnatum/equiseti that did not grow in cultures of tissue but was identified by molecular means.

James Riddell; Woodside, Kenneth J.; Leavitt, Matthew A.; Newton, Duane W.; Punch, Jeffery D.

2010-01-01

406

Delayed Graft Function in the Kidney Transplant  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Acute kidney injury occurs with kidney transplantation and too frequently progresses to the clinical diagnosis of delayed graft function (DGF). Poor kidney function in the first week of graft life is detrimental to the longevity of the allograft. Challenges to understand the root cause of DGF include several pathologic contributors derived from the donor (ischemic injury, inflammatory signaling) and recipient (reperfusion injury, the innate immune response, and the adaptive immune response). ...

2011-01-01

407

DNA nanosensor surface grafting and salt dependence  

Science.gov (United States)

In this paper we investigated the Paracoccidoides brasiliensis fungus nanosensor by simulations of simple strand DNA grafting on gold nanoparticle. In order to improve the knowledge of nanoparticle environment, the addiction of salt solution was studied at the models proposed by us. Nanoparticle and DNA are represented by economic models validated by us in this paper. In addition, the DNA grafting and salt influences are evaluated by adsorption and bond energies calculations. This theoretical evaluation gives support to experimental diagnostics techniques of diseases.

Carvalho, B. G.; Fagundes, J.; Martin, A. A.; Raniero, L.; Favero, P. P.

2013-02-01

408

Production of fats and oils by microorganisms  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the production of fats and oils by microorganisms. Various fat-productive bacteria have been found to produce the fats and oils by microorganisms which are roughly classified into enzyme and filiform fungus. The cells do not proliferate under the conditions adequate for producing the cells with the high content of lipid. A cell with high content of fat belonging to Mortierella filamentas fungi has been recently obtained at high density in the high concentration culture medium. The productivity of the fat similar to cocoa butter seems to be also high. A lot of microorganisms producing various functional fatty acids have been found. The microorganismic production methods of esters of longer-chain dicarboxylic acids and alcohols than C/sub 11/ hardly produced in nature form n-alkane also have been recently developed. Squalene has been able to produce by a cell from the other raw materials than the shark oil. Various sterols exist in microorganisms. The high-productivity manufacturing method of the fats containing gamma-linoleic acid by Mortierella filiform fungi has been developed and commercialized as the first production process of the fat by the microorganism. (5 figs, 7 tabs, 128 refs

Suzuki, Osamu

1987-10-20

409

Teratoma with intraventricular free fat on CT  

International Nuclear Information System (INIS)

Intracranial fat-containing congenital tumors are characterized by negative absorption values on computed tomography(CT). We are reporting a case of teratoma with intraventricular free fat diagnosed preoperatively by CT. The case is a 19-year-old female who was admitted to our hospital because of contineous severe headache, nausea and vomiting. At the time of admission, her physical and neurological examination was negative except for bilateral papilledema. CT demonstrated marked enlargement of the right lateral ventricle. In addition, there was negative absorption value (-90 H.U.), suggesting free fat, within right frontal horn layering above the CSF with a fluid level. Metrizamide ventriculography demonstrated complete obstruction and revealed an irregular shadow defect at the right foramen of Monro. At surgery, yellowish cheese-like material, white hair was found on the surface of the CSF. Tumor arose from the floor of the right foramen of Monro and extended upward. The patient made an uneventful recovery and was discharged 17 days after surgery. Intraventricular free fat is likely that to be released from the teratoma cyst ruptured spontaneously when the patient complained of severe headache 40 days prior to admission. There have been several published reports of the CT appearances of intracranial fat-containing tumors, however, teratoma with intraventricular free fat is very rare. It was concluded that fat-containing tumors should be highly suspected, when negative absorption values were found on CT. (author)

1983-01-01

410

Effect of different grafting methods for absorption, translocation and distribution of 59Fe in apple trees  

International Nuclear Information System (INIS)

The test result with 59Fe demonstrate that the iron content in leaves by belly grafting is higher than that by cleft grafting and cutting grafting, and the content of chlorophyll in leaves and height and diameter of apple seedling by belly grafting is larger than cleft grafting and cutting grafting too. It is important to replace cleft grafting and cutting grafting with belly grafting as a method of top-working to correct chlorosis and improve growth of new cultivar

1999-10-01

411

Antecedents and consequences of expectations related to fat-free and regular-fat foods.  

Science.gov (United States)

Hedonic and sensory expectations related to fat-free and regular-fat pound cake, crackers and American cheese were studied with 97 subjects divided into three subgroups, each testing one type of product. Four study phases were separated by 1-month intervals: (1) a questionnaire on demographics, dietary practices and consumption of the test products, (2) intensity ratings of sensory attributes and ratings of liking of unlabeled fat-free and regular-fat samples, (3) ratings of expected attribute intensities and liking in response to product labels of "fat-free" and "regular", and subsequent ratings of these samples and (4) phase 3 repeated with opposite (incorrect) labels. Fat-free products were expected to be less liked than their regular counterparts; however, only cheese was less liked in actual taste tests. Expected liking was best predicted by familiarity with the product and, in the case of fat-free products, by the extent to which a person substituted low-fat for high-fat foods. Actual liking was best predicted by the effect of labeling and by expectations. The expected intensities of sensory attributes were uniformly higher in regular than in fat-free products. Both sensory and hedonic ratings of labeled samples changed in the direction of expectations, as compared to baseline values, supporting an assimilation model of the effect of disconfirmed expectations on sensory perception and consumer acceptance. PMID:7726543

Tuorila, H; Cardello, A V; Lesher, L L

1994-12-01

412

Rheological properties of ice cream mixes and frozen ice creams containing fat and fat replacers.  

Science.gov (United States)

Ice cream mixes and frozen ice creams at milk fat levels of 12%, 8%, 6%, 6% plus a protein-based fat replacer, and 6% plus a carbohydrate-based fat replacer were evaluated for viscoelastic properties by dynamic testing with sinusoidal oscillatory tests at various frequencies. The storage modulus (G'), loss modulus (G"), and tan delta (G"/G') were calculated for all the treatments to determine changes in the viscous and elastic properties of the mixes and frozen ice creams due to fat content. In ice cream mixes, G' and G" exhibited a strong frequency dependence. The G" was higher than G' throughout the frequency range (1 to 8 Hz) examined, without any crossover, except for the 12% mix. Elastic properties of the ice cream mixes decreased as fat content decreased. Tan delta values indicated that fat replacers did not enhance the elastic properties of the ice cream mixes. In all frozen ice creams, G' and G" again showed a frequency dependence throughout the range tested (0.5 to 10 Hz). The amount of fat in ice creams and the degree of fat destabilization affected the elasticity in the frozen product. Even though the ice creams did not have significant elastic properties, when compared as a group the samples with higher fat content had higher elastic properties. The addition of protein-based and carbohydrate-based fat replacers did not enhance the elastic properties of the ice creams but did increase the viscous properties. PMID:11049062

Adapa, S; Dingeldein, H; Schmidt, K A; Herald, T J

2000-10-01

413

Audit of attendance rates for an infra-inguinal graft surveillance programme--how complete is your graft surveillance?  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Much has been written on the subject of graft surveillance following infra-inguinal bypass graft surgery, but surprisingly little information exists on actual attendance rates for such programmes. The aim of this study was to calculate the attendance rate for graft surveillance at the vascular unit in Cheltenham. All patients who entered the graft surveillance programme following an infra-inguinal graft procedure over a 5-year period were included in the study. Partial and complete surveillan...

Mcintosh, J.; Crook, T. J.; Poskitt, K. R.; Whyman, M. R.

2002-01-01

414

Application of fats in some food products  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in english Fats and oils are very important raw materials and functional ingredients for several food products such as confectionery, bakery, ice creams, emulsions, and sauces, shortenings, margarines, and other specially tailored products. Formulated products are made with just about every part of chemistry, [...] but they are not simple chemicals. In general, they consist of several, and often many, components. Each of these components has a purpose. Most formulated products have a micro- or nano-structure that is important for their function, but obtaining this structure is often the big challenge. Due to a rise in overweight or obesity, health concerns have increased. This fact has led to the need to the develop products with low fat content, which have become a market trend. In addition, the development of new products using fat substitutes can be a good option for companies that are always trying to reduce costs or substitute trans fat or saturated fat. However, the successful development of these products is still a challenge because fat plays multiple roles in determining the desirable physicochemical and sensory attributes, and because the consumers who want or need to replace these ingredients, seek products with similar characteristics to those of the original product. Important attributes such as smooth, creamy and rich texture; milky and creamy appearance; desirable flavor; and satiating effects are influenced by the droplets of fat, and these characteristics are paramount to the consumer and consequently crucial to the success of the product in the market. Therefore, it is important to identify commercially viable strategies that are capable of removing or reducing fat content of food products without altering their sensory and nutritional characteristics. This paper intended to provide an overview about the role of fat in different food systems such as chocolate, ice cream, bakery products like biscuits, breads, and cakes considering the major trends of the food industry to meet the demands of modern society.

Raquel Vallerio, Rios; Meibel Durigan Ferreira, Pessanha; Poliana Fernandes de, Almeida; Clara Leonel, Viana; Suzana Caetano da Silva, Lannes.

415

Photoacoustic detection of neovascularities in skin graft  

Science.gov (United States)

We previously proposed a new method for monitoring adhesion of skin graft by measuring photoacoustic (PA) signal originated from the neovascularities. In this study, immunohistochemical staining (IHC) with CD31 antibody was performed for grafted skin tissue to observe neovascularity, and the results were compared with PA signals. We also used a laser Doppler imaging (LDI) to observe blood flow in the grafted skin, and sensitivity of PA measurement and that of LDI were compared. In rat autograft models, PA signals were measured for the grafted skin at postgrafting times of 0-48 h. At 6 h postgrafting, PA signal was observed in the skin depth region of 500-600 mm, while the results of IHC showed that angiogenesis occurred at the depth of about 600 mm. Depths at which PA signal and angiogenesis were observed decreased with postgrafting time. These indicate that the PA signal observed at 6 h postgrafting originated from the neovascularities in the skin graft. Results of LDI showed no blood-originated signal before 48 h postgrafting. These findings suggest that PA measurement is effective in monitoring the adhesion of skin graft in early stage after transplantation.

Yamazaki, Mutsuo; Sato, Shunichi; Saitoh, Daizo; Ishihara, Miya; Okada, Yoshiaki; Ashida, Hiroshi; Obara, Minoru

2005-04-01

416

FDG-PET in prosthetic graft infections.  

Science.gov (United States)

Graft infection following prosthetic vascular reconstruction is an uncommon but severe complication. The clinical presentation is often subtle and nonspecific and may occur long after surgery. Although defining a prosthetic vascular graft infection can be difficult, early diagnosis and treatment are essential for the correct choice of treatment to prevent further complications as well as the high morbidity and mortality associated with repeat surgery and removal of infected grafts. False-positive results may lead to unnecessary surgery while failure to diagnose graft infection may have life-threatening sequels. Scarce literature that is currently available regarding the role of (18)F-labeled fluorodeoxyglucose imaging for assessment of vascular graft infection suggests that this modality may represent reliable noninvasive imaging modality in this specific clinical setting. PET/CT increases the test specificity and thus improves diagnostic accuracy. The precise anatomic localization of increased (18)F-labeled fluorodeoxyglucose PET/CT enables accurate differentiation between graft and adjacent soft tissue infection leading to more accurate diagnosis and subsequent optimized therapeutic strategy. PMID:23905620

Keidar, Zohar; Nitecki, Samy

2013-09-01

417

Graft-copolymerization onto carbon black  

International Nuclear Information System (INIS)

Radiation-induced graft copolymerization of vinyl monomer onto carbon black was performed. During the ?-ray- and electron beam-induced polymerization (In-source), or the electron beam post-polymerization, the graft-copolymerization behavior was affected by the kinds of both carbon blacks and monomers, i.e. the smaller the size of carbon black particles, the higher the apparent grafted fraction. Homopolymer in the grafted carbon black samples was washed out by the solvent of the polymer, and the extracted polymer seemed to be dimer or trimer of the used monomer. In the case of the post-polymerization with the pre-irradiation doses of 50 Mrad, homopolymer was hardly observed. The polymer sheets of plastics or rubbers with grafted carbon black had an electrical conductivity unalterable considerably by the heating cycles. The particles of grafted carbon black in the sheet might be kept much more at the surface layer within 100 nm depth than at the inner layer. (author)

1988-01-01

418

Additive effects in radiation grafting and curing  

Energy Technology Data Exchange (ETDEWEB)

Full text: Detailed studies on the accelerative effect of novel additives in radiation grafting and curing using acrylated monomer/oligomer systems have been performed in the presence of ionising radiation and UV as sources. Methyl methacrylate (MMA) is used as typical monomer for these grafting studies in the presence of the additives with model backbone polymers, cellulose and propropylene. Additives which have been found to accelerate these grafting processes are: mineral acid, occlusion compounds like urea, thermal initiators and photoinitiators as well as multifunctional monomers such as multifunctional acrylates. The results from irradiation with gamma rays have also been compared with irradiation from a 90W UV lamp. The role of the above additives in accelerating the analogous process of radiation curing has been investigated. Acrylated urethanes, epoxies and polyesters are used as oligomers together with acrylated monomers in this work with uv lamps of 300 watts/inch as radiation source. In the UV curing process bonding between film and substrate is usually due to physical forces. In the present work the presence of additives are shown to influence the occurrence of concurrent grafting during cure thus affecting the nature of the bonding of the cured film. The conditions under which concurrent grafting with UV can occur will be examined. A mechanism for accelerative effect of these additives in both grafting and curing processes has been proposed involving radiation effects and partitioning phenomena.

Viengkhou, V.; Ng, L. [University of Western Sydney, Nepean, Kingswood, NSW (Australia).Department of Chemistry

1996-12-31

419

Polypeptide Grafted Hyaluronan: Synthesis and Characterization  

Energy Technology Data Exchange (ETDEWEB)

Poly(L-leucine) grafted hyaluronan (HA-g-PLeu) has been synthesized via a Michael addition reaction between primary amine terminated poly(L-leucine) and acrylate-functionalized HA (TBAHA-acrylate). The precursor hyaluronan was first functionalized with acrylate groups by reaction with acryloyl chloride in the presence of triethylamine in N,N-dimethylformamide. 1H NMR analysis of the resulting product indicated that an increase in the concentration of acryloylchoride with respect to hydroxyl groups on HA has only a moderate effect on functionalization efficiency, f. A precise control of stoichiometry was not achieved, which could be attributed to partial solubility of intermolecular aggregates and the hygroscopic nature of HA. Michael addition at high [PLeu- NH2]/[acrylate]TBAHA ratios gave a molar grafting ratio of only 0.20 with respect to the repeat unit of HA, indicating grafting limitation due to insolubility of the grafted HA-g-PLeu. Soluble HA-g-PLeu graft copolymers were obtained for low grafting ratios (<0.039) with <8.6% by mass of PLeu and were characterized thoroughly using light scattering, 1H NMR, FT-IR, and AFM techniques. Light scattering experiments showed a strong hydrophobic interaction between PLeu chains, resulting in aggregates with segregated nongrafted HA segments. This yields local networks of aggregates, as demonstrated by atomic force microscopy. Circular dichroism spectroscopy showed a -sheet conformation for aggregates of poly(L-leucine).

Wang, Xiaojun [ORNL; Messman, Jamie M [ORNL; Mays, Jimmy [ORNL; Baskaran, Durairaj [University of Tennessee, Knoxville (UTK)

2010-01-01

420

MR imaging of osteochondral grafts and autologous chondrocyte implantation  

International Nuclear Information System (INIS)

Surgical articular cartilage repair therapies for cartilage defects such as osteochondral autograft transfer, autologous chondrocyte implantation (ACI) or matrix associated autologous chondrocyte transplantation (MACT) are becoming more common. MRI has become the method of choice for non-invasive follow-up of patients after cartilage repair surgery. It should be performed with cartilage sensitive sequences, including fat-suppressed proton density-weighted T2 fast spin-echo (PD/T2-FSE) and three-dimensional gradient-echo (3D GRE) sequences, which provide good signal-to-noise and contrast-to-noise ratios. A thorough magnetic resonance (MR)-based assessment of cartilage repair tissue includes evaluations of defect filling, the surface and structure of repair tissue, the signal intensity of repair tissue and the subchondral bone status. Furthermore, in osteochondral autografts surface congruity, osseous incorporation and the donor site should be assessed. High spatial resolution is mandatory and can be achieved either by using a surface coil with a 1.5-T scanner or with a knee coil at 3 T; it is particularly important for assessing graft morphology and integration. Moreover, MR imaging facilitates assessment of complications including periosteal hypertrophy, delamination, adhesions, surface incongruence and reactive changes such as effusions and synovitis. Ongoing developments include isotropic 3D sequences, for improved morphological analysis, and in vivo biochemical imaging such as dGEMRIC, T2 mapping and diffusion-weighted imaging, which make functional analysis of cartilage possible. (orig.)

2007-01-01

 
 
 
 
421

MR imaging of osteochondral grafts and autologous chondrocyte implantation  

Energy Technology Data Exchange (ETDEWEB)

Surgical articular cartilage repair therapies for cartilage defects such as osteochondral autograft transfer, autologous chondrocyte implantation (ACI) or matrix associated autologous chondrocyte transplantation (MACT) are becoming more common. MRI has become the method of choice for non-invasive follow-up of patients after cartilage repair surgery. It should be performed with cartilage sensitive sequences, including fat-suppressed proton density-weighted T2 fast spin-echo (PD/T2-FSE) and three-dimensional gradient-echo (3D GRE) sequences, which provide good signal-to-noise and contrast-to-noise ratios. A thorough magnetic resonance (MR)-based assessment of cartilage repair tissue includes evaluations of defect filling, the surface and structure of repair tissue, the signal intensity of repair tissue and the subchondral bone status. Furthermore, in osteochondral autografts surface congruity, osseous incorporation and the donor site should be assessed. High spatial resolution is mandatory and can be achieved either by using a surface coil with a 1.5-T scanner or with a knee coil at 3 T; it is particularly important for assessing graft morphology and integration. Moreover, MR imaging facilitates assessment of complications including periosteal hypertrophy, delamination, adhesions, surface incongruence and reactive changes such as effusions and synovitis. Ongoing developments include isotropic 3D sequences, for improved morphological analysis, and in vivo biochemical imaging such as dGEMRIC, T2 mapping and diffusion-weighted imaging, which make functional analysis of cartilage possible. (orig.)

Trattnig, S. [Medical University of Vienna, MR Centre of Excellence, Department of Radiology, Vienna (Austria); University Hospital of Vienna, MR-Center, Department of Radiology, Vienna (Austria); Millington, S.A. [Medical University of Vienna, MR Centre of Excellence, Department of Radiology, Vienna (Austria); Medical University of Vienna, Department of Trauma Surgery, Center for Joints and Cartilage, Vienna (Austria); Szomolanyi, P. [Medical University of Vienna, MR Centre of Excellence, Department of Radiology, Vienna (Austria); Marlovits, S. [Medical University of Vienna, Department of Trauma Surgery, Center for Joints and Cartilage, Vienna (Austria)

2007-01-15

422

CT findings of cerebral fat embolism  

International Nuclear Information System (INIS)

A case of cerebral fat embolism following multiple bone fractures is presented. A 27-year-old patient was admitted to our clinic 50 minutes after a traffic accident. He was somnolent on admission, but his consciousness level was gradually raised and respiratory symptoms (dyspnea, bloody sputum) appeared with petechiae of his conjunctiva and chest. We diagnosed cerebral fat embolism. On CT scan we found multiple high-density areas, which gradually turned into multiple low-density areas. Subsequent cerebral atrophy and subdural effusion developed one month after the injury. This patient showed a typical clinical course and CT findings of cerebral fat embolism. (author)

1986-01-01

423

Differential effect of gender on hepatic fat  

International Nuclear Information System (INIS)

There are discrepant data on whether men or women have a higher risk for hepatic steatosis. To examine the influence of gender on hepatic adiposity in teenagers and young adults. We measured subcutaneous abdominal fat (SAF), intra-abdominal fat (IAF) and hepatic tissue density (a surrogate measure of hepatic fat) using CT in 505 healthy teenagers and young adults (254 males, 251 females; ages 15-22.9 years). Overall, compared to men, women had higher values of SAF (P 0.05). When compared to overweight and obese young women, overweight and obese young men are at greater risk for hepatic steatosis, independent of IAF. (orig.)

2011-09-01

424

Determination of fat in vegetable foods.  

Science.gov (United States)

The fat in vegetable foods--tree nuts, peanuts, sunflower seeds, avocado, and olives--can be determined volumetrically by acid digestion of the material and separation of the fat. The assay can be performed conveniently by using the equipment developed for fat determination of milk (Gerber method). The results agree well with those obtained by Soxhlet extraction. The advantages of using the Gerber method for vegetable foods are simplicity, speed, low operation cost, and elimination of the use of inflammable solvents. PMID:4086447

Rosenthal, I; Merin, U; Popel, G; Bernstein, S

1985-01-01

425

The characterization of the physicochemical and sensory properties of full-fat, reduced-fat, and low-fat ovine and bovine Halloumi.  

Science.gov (United States)

Halloumi cheese is a popular cheese in Lebanon and the Middle East. Today, health-conscious consumers are demanding lower fat foods with sensory properties that are comparable to their full-fat counterparts. The objectives of this work were to characterize the physicochemical and sensory properties of bovine and ovine Halloumi of different fat levels and to provide a baseline sensory profile for Halloumi cheese. Full-fat, reduced-fat, and low-fat samples were produced from ovine and bovine milks in 2 batches resulting in a total of 12 batches. The fat, protein, moisture, ash, pH, sodium, and calcium levels were determined and the instrumental textural characteristics of the samples were measured using a texture analyzer. Eleven trained panelists used quantitative descriptive analysis to profile the sensory attributes of the samples and an acceptability test was conducted with 84 panelists. The type of milk (ovine vs. bovine) significantly affected the moisture and protein contents, whereas fat level had a significant effect on moisture, fat, protein, and ash contents. Instrumental texture analysis revealed that the type of milk significantly affected adhesiveness, chewiness, and hardness, whereas the fat level affected chewiness, hardness, adhesiveness, and cohesiveness. The sensory results of the trained panelists revealed that the ovine cheese was more yellow and harder than bovine cheese, whereas bovine cheese was squeakier. Low-fat and reduced-fat cheeses were also more yellow and harder than full-fat cheese, and full-fat cheese was more moist with no significant differences between the low-fat and reduced-fat varieties. Type of milk and fat level did not have any significant effect on fermented flavor, whey flavor, or saltiness. Bovine cheese received significantly higher scores on overall acceptability, texture acceptability, and significantly lower scores on the food action rating scale. Full-fat cheese obtained the highest score on overall acceptability, and texture acceptability decreased significantly with decreasing fat levels. PMID:19700674

Lteif, L; Olabi, A; Kebbe Baghdadi, O; Toufeili, I

2009-09-01

426

Indirect MR-arthrography in osteochondral autograft and crushed bone graft with a collagen membrane-Correlation with histology  

International Nuclear Information System (INIS)

Objective: To analyze the spectrum of findings in indirect MR-arthrography following osteochondral autograft transfer system (OATS) and crushed bone graft using a magnetic resonance imaging (MRI) scoring and grading system in relation to histology as the standard of reference. Materials and methods: Iatrogenic lesions were set at ovine condylar facets (n = 6/group), treated with OATS or crushed bone graft. 1.5 T MRI was performed 6 months after surgery using PD-weighted (w fat saturated (fs) fast spin echo (FSE), T1-w 2D, and 3D fs gradient echo (GE) sequences 30 min. after i.v. Gd-DTPA administration and passive joint exercise. The repair tissue was evaluated by two independent radiologists. The MR findings were compared to histology. Results: In all cases, MRI and histologic grading correlated well and showed significant superior repair in OATS at 6 months (p < 0.05), reproducing the original articular contour and a good subchondral restoration. FsT1-w3DGE proved most appropriate identifying characteristic post-operative findings: the OATS group demonstrated bone marrow edema at the donor site and the graft/host interface showed significant enhancement in indirect MR-arthrography, indicating fibrocartilage. After crushed bone graft, we found an irregular structure and significant contrast uptake, consistent with remnants of bone grafts surrounded by inflammatory tissue. Conclusion: Indirect MR-arthrography is an accurate, non-invasive monitoring tool following OATS and crushed bone graft as the MRI scoring and grading system allows a reliable evaluation of normal and pathological osteochondral repair with a high histologic correlation.

2009-04-01

427

Indirect MR-arthrography in osteochondral autograft and crushed bone graft with a collagen membrane-Correlation with histology  

Energy Technology Data Exchange (ETDEWEB)

Objective: To analyze the spectrum of findings in indirect MR-arthrography following osteochondral autograft transfer system (OATS) and crushed bone graft using a magnetic resonance imaging (MRI) scoring and grading system in relation to histology as the standard of reference. Materials and methods: Iatrogenic lesions were set at ovine condylar facets (n = 6/group), treated with OATS or crushed bone graft. 1.5 T MRI was performed 6 months after surgery using PD-weighted (w fat saturated (fs) fast spin echo (FSE), T1-w 2D, and 3D fs gradient echo (GE) sequences 30 min. after i.v. Gd-DTPA administration and passive joint exercise. The repair tissue was evaluated by two independent radiologists. The MR findings were compared to histology. Results: In all cases, MRI and histologic grading correlated well and showed significant superior repair in OATS at 6 months (p < 0.05), reproducing the original articular contour and a good subchondral restoration. FsT1-w3DGE proved most appropriate identifying characteristic post-operative findings: the OATS group demonstrated bone marrow edema at the donor site and the graft/host interface showed significant enhancement in indirect MR-arthrography, indicating fibrocartilage. After crushed bone graft, we found an irregular structure and significant contrast uptake, consistent with remnants of bone grafts surrounded by inflammatory tissue. Conclusion: Indirect MR-arthrography is an accurate, non-invasive monitoring tool following OATS and crushed bone graft as the MRI scoring and grading system allows a reliable evaluation of normal and pathological osteochondral repair with a high histologic correlation.

Streitparth, F. [Klinik fuer Strahlenheilkunde, Charite, Campus Virchow-Klinikum, Humboldt-University, Berlin (Germany)], E-mail: florian.streitparth@charite.de; Schoettle, P.; Schell, H. [Center for Musculoskeletal Surgery, Charite, Campus Virchow-Klinikum, Humboldt-University, Berlin (Germany); Lehmkuhl, L.; Madej, T.; Wieners, G. [Klinik fuer Strahlenheilkunde, Charite, Campus Virchow-Klinikum, Humboldt-University, Berlin (Germany); Duda, G.N. [Center for Musculoskeletal Surgery, Charite, Campus Virchow-Klinikum, Humboldt-University, Berlin (Germany); Schroeder, R.J. [Klinik fuer Strahlenheilkunde, Charite, Campus Virchow-Klinikum, Humboldt-University, Berlin (Germany)

2009-04-15

428

Isotopic scintigraphy in kidney grafting  

International Nuclear Information System (INIS)

Isotopic explorations of kidney transplants were performed on sixty-six patients. Three scintigraphic techniques were used: labelled ferrous ascorbate scintigraphy, sequential 99m technetium DTPA scintigraphy and the "1"3"1I hippuran nephrogram. The aim of this study is to analyse the results obtained under different pathological circumstances affecting the transplant, to discuss the advantages of the techniques and to propose a working procedure. The most reliable and accurate technique is the "1"3"1I hippuran nephrogram combined with sequential 99mTc DTPA, by which renal vascularisation may be judged labelled ferrous ascorbate on the other hand is too insensitive. Although the information supplied is mostly contained in the scintigraphic images, the nephrographic curves and the blood radioactivity decay time and rad V/rad R ratio measurements are very helpful in the early diagnosis and differential diagnosis of complications affecting the transplant. The proper use of isotopic scintigraphy in kidney grafting should provide optimum conditions for better survival of the transplant at minimum risk to the patient

1976-01-01

429

Monounsaturated fats and immune function  

Directory of Open Access Journals (Sweden)

Full Text Available Animal studies suggest that olive oil is capable of modulating functions of cells of the immune system in a manner similar to, albeit weaker than, fish oils. There is some evidence that the effects of olive oil on immune function in animal studies are due to oleic acid rather than to trace elements or antioxidants. Importantly, several studies have demonstrated effects of oleic acid-containing diets on in vivo immune responses. In contrast, consumption of a monounsaturated fatty acid (MUFA-rich diet by humans does not appear to bring about a general suppression of immune cell functions. The effects of this diet in humans are limited to decreasing aspects of adhesion of peripheral blood mononuclear cells, although there are trends towards decreases in natural killer cell activity and proliferation. The lack of a clear effect of MUFA in humans may be attributable to the higher level of monounsaturated fat used in the animal studies, although it is ultimately of importance to examine the effects of intakes which are in no way extreme. The effects of MUFA on adhesion molecules are potentially important, since these molecules appear to have a role in the pathology of a number of diseases involving the immune system. This area clearly deserves further exploration

P. Yaqoob

1998-04-01

430

Monounsaturated fats and immune function  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in english Animal studies suggest that olive oil is capable of modulating functions of cells of the immune system in a manner similar to, albeit weaker than, fish oils. There is some evidence that the effects of olive oil on immune function in animal studies are due to oleic acid rather than to trace elements [...] or antioxidants. Importantly, several studies have demonstrated effects of oleic acid-containing diets on in vivo immune responses. In contrast, consumption of a monounsaturated fatty acid (MUFA)-rich diet by humans does not appear to bring about a general suppression of immune cell functions. The effects of this diet in humans are limited to decreasing aspects of adhesion of peripheral blood mononuclear cells, although there are trends towards decreases in natural killer cell activity and proliferation. The lack of a clear effect of MUFA in humans may be attributable to the higher level of monounsaturated fat used in the animal studies, although it is ultimately of importance to examine the effects of intakes which are in no way extreme. The effects of MUFA on adhesion molecules are potentially important, since these molecules appear to have a role in the pathology of a number of diseases involving the immune system. This area clearly deserves further exploration

P., Yaqoob.

431

Postoperative irradiation of fresh autogenic cancellous bone grafts  

International Nuclear Information System (INIS)

Discontinuity defects were created in the mandibles of dogs and then reconstructed immediately with fresh autogenic cancellous bone grafts and Dacron-urethane prostheses. The grafts were irradiated to a total dose of 5000 rads after waiting intervals of between 3 and 12 weeks. Nonirradiated grafts served as controls. The grafts were evaluated clinically, radiographically, and histologically. There was complete incorporation of all grafts, regardless of the interval between surgery and radiotherapy. There were no soft-tissue complications. The controls were distinguishable from the irradiated grafts only by the presence of hematopoietic bone marrow. Fibrofatty marrow was observed in the irradiated grafts. Theoretical support for this technique is found in the biology of cancellous bone grafting and the pathology of radiation injury. In view of the difficulties associated with mandibular bone grafting in preoperatively irradiated patients, a new method of reconstructing selected cancer patients who require both mandibular resection and radiotherapy is suggested

1986-01-01

432

Above-knee femoropopliteal bypass grafts and the consequences of graft failure.  

Science.gov (United States)

In all, 290 femoral to above-knee popliteal artery bypasses were performed between January 1983 and September 1991. PTFE grafts were used in 113 cases (39%) and vein grafts in 177 (61%) (reversed in 146 cases and in situ in 31). Patients were followed up for a median time of 20 months. The 2-, 4- and 6-year patency rates for vein and PTFE grafts were 70%, 62% and 57%, respectively, compared with 58%, 46% and 41% (no statistical difference in survival curves, P = 0.2). The 2-, 4- and 6-year limb salvage rates were 82%, 78% and 62% compared with 75%, 64% and 58% (no statistical difference in survival curves, P = 0.6). A total of 99 grafts occluded during follow-up (45 PTFE and 54 vein grafts). Major amputation was required in 63 limbs; below-knee in 37 limbs (59%), and above-knee in 26 limbs (41%). There was no statistical difference in the amputation level with respect to the graft type. Final healing at the below-knee level was achieved in 23 of 35 (66%) failed vein grafts and in 14 of 28 (50%) failed PTFE grafts. PMID:8379629

John, T G; Stonebridge, P A; Kelman, J; Murie, J A; Jenkins, A M; Ruckley, C V

1993-07-01

433

Inhomogeneous distribution of fat enhances the perception of fat-related sensory attributes in gelled foods  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This study investigated the effect of the spatial distribution of fat on the perception of fat-related sensory attributes using a model system that consisted of layered agar/gelatin gels containing oil-in-water (O/W) emulsion droplets dispersed in the gel matrix. Four layers of gel varying in the amount of emulsion droplets were combined to prepare samples with homogeneous and inhomogeneous distributions of fat (emulsion droplets). The composition of the gels was optimized to obtain samples w...

2012-01-01

434

Fat Avoidance and Replacement Behaviors Predict Low-Fat Intake Among Urban, African American Adolescents  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Using measures of behaviors shown to predict low-fat intake in previous research, this study examined whether the behaviors would predict low-fat intake among urban, African American adolescents. Recruited through youth services agencies in Philadelphia, Pennsylvania, participants were 399 African American adolescents (67% female) with a mean age of 13.09 years (range, 10–15 years). Fat-related dietary behaviors were measured using items that were adapted from the Food Habits Questionnaire....

Noia, Jennifer Di; Contento, Isobel R.; Schinke, Steven P.

2008-01-01

435

Sonographic Prediction of Body Fat Volume (Subcutaneous and Visceral Fat in Cardiovascular Patients  

Directory of Open Access Journals (Sweden)

Full Text Available Background: Inappropriate body composition represents impaired energy and nutrient intake and can be a risk factor for many diseases, especially for cardiovascular disease. Different methods have been suggested for the estimation of body fat volume and its distribution. However, they may be either expensive or hazardous for some groups of patients. Sonography is a very accessible technique, which may be used for the evaluation of visceral and subcutaneous fat volume. The purpose of this study was to evaluate the sonographic prediction of body fat and its distribution in subcutaneous and visceral compartments.Methods: During a three-month period, we conducted sonographic evaluations for visceral and subcutaneous fat in 106