نتایج جستجو برای: critical blood velocity

تعداد نتایج: 1267391  

AR. Haghighi, M. Kiyasatfar N. Aliashrafi

Blood flow is modeled as non-Newtonian micropolar fluid. The non-linear governing equations of continuum and momentum in the cylindrical coordinate are being discretized using a finite difference approach and have been solved iteratively ,through Crank-Nicolson method. The blood velocity distribution, volumetric flow rate and Resistance to blood flow at the stenosis throat are computed for vari...

Journal: :The Laryngoscope 2008
John A Russell Hiromi Nagai Nadine P Connor

OBJECTIVE/HYPOTHESIS Age-associated muscular changes and fatigue have been shown to affect phonatory function. Reductions in blood flow with aging could translate to reductions in oxidative capacity within laryngeal muscles and increased fatigability. We tested the hypothesis that there would be increased capillary red blood cell (RBC) velocity and a reduction of capillary density in the thyroa...

2017
Juan A. Diez Rafael Arrojo e Drigo Xiaofeng Zheng Olga V. Stelmashenko Minni Chua Rayner Rodriguez-Diaz Masahiro Fukuda Martin Köhler Ingo Leibiger Sai Bo Bo Tun Yusuf Ali George J. Augustine Veluchamy A. Barathi Per-Olof Berggren

Blood flow regulation in pancreatic islets is critical for function but poorly understood. Here, we establish an in vivo imaging platform in a non-human primate where islets transplanted autologously into the anterior chamber of the eye are monitored non-invasively and longitudinally at single-cell resolution. Engrafted islets were vascularized and innervated and maintained the cytoarchitecture...

Journal: :British journal of anaesthesia 2002
S J Jones J Dinsmore

BACKGROUND The aim of this investigation was to determine the effects of diclofenac on cerebral blood flow. Middle cerebral artery blood flow velocity was measured in nine patients with supratentorial tumours. METHODS Using a transcranial Doppler ultrasound, we measured the baseline mean and systolic cerebral blood flow velocity. Measurements were repeated following administration of diclofen...

2003
Alexander L. Klibanov Sanjiv Kaul Mark E. Shaffrey Jiri Sklenar Jonathan R. Lindner

Background—Angiogenesis is a critical determinant of tumor growth and metastasis. We hypothesized that contrastenhanced ultrasound (CEU) with microbubbles targeted to v-integrins expressed on the neovascular endothelium could be used to image angiogenesis. Methods and Results—Malignant gliomas were produced in 14 athymic rats by intracerebral implantation of U87MG human glioma cells. On day 14 ...

Journal: :Circulation 2003
Dilantha B Ellegala Howard Leong-Poi Joan E Carpenter Alexander L Klibanov Sanjiv Kaul Mark E Shaffrey Jiri Sklenar Jonathan R Lindner

BACKGROUND Angiogenesis is a critical determinant of tumor growth and metastasis. We hypothesized that contrast-enhanced ultrasound (CEU) with microbubbles targeted to alpha(v)-integrins expressed on the neovascular endothelium could be used to image angiogenesis. METHODS AND RESULTS Malignant gliomas were produced in 14 athymic rats by intracerebral implantation of U87MG human glioma cells. ...

Journal: :medical journal of islamic republic of iran 0
pooya baradaran motie iran university of medical sciences, rasoul-e-akram hospital, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) ali zare-mirzaie iran university of medical sciences, pathology ward, rasoul-e-akram hospital, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) nasrin shayanfar iran university of medical sciences, pathology ward, rasoul-e-akram hospital, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) maryam kadivar iran university of medical sciences, pathology ward, rasoul-e-akram hospital, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

background: routine repeat testing of critical laboratory values is very common these days to increase their accuracy and to avoid reporting false or infeasible results. we figure that repeat testing of critical laboratory values has any benefits or not.   methods : we examined 2233 repeated critical laboratory values in 13 different hematology and chemistry tests including: hemoglobin, white b...

Journal: :Circulation research 1982
W M Chilian M L Marcus

Knowledge concerning phasic coronary blood flow is based primarily on measurements obtained from epicardial coronary arteries, which, in part, function as capacitors. If present, epicardial capacitance effects could obscure the dynamic nature of phasic intramyocardial perfusion. To analyze this effect of epicardial capacitance, we simultaneously measured coronary blood flow velocity in an epica...

2007
K. Papadopoulos

It is shown that the anomalous glow observed in the recent space shuttle flights can be attributed to a combination of beam plasma discharge and critical ionization phenomena. While the shuttle velocity (~8 km s -x) is below the critical ionization velocity, which for oxygen is 12.7 km s -x, specular reflection of a small fraction (2-3%) of ambient ions forms an ion beam with velocity 16 km s -...

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