نتایج جستجو برای: wall pressure

تعداد نتایج: 562422  

M. Mansori M. Mokhtari-Dizaji M. Zarin S. Shahbazi

Introduction: Based on the invasive studies it has been shown that factors such as age, the progress of eye disorders, lens fibers compression and the biochemical changes of ocular matrix alter the physical characteristics and elastic properties of eye. In this study, a noninvasive method of estimating human eye elasticityis proposed and its relation with age and gender is evaluated using ultra...

Journal: :Stroke 2000
M E Safar J Blacher J J Mourad G M London

BACKGROUND AND PURPOSE Because epidemiological studies show that increased pulse pressure and carotid wall-material stiffness are predictors of cardiovascular mortality independent of age, atherosclerosis, and conventional risk factors, the relationships between carotid wall stiffness and blood pressure are important to the optimization of cardiovascular prevention. SUMMARY OF REVIEW In middl...

Journal: :American journal of physiology. Heart and circulatory physiology 2000
C Greyson Y Xu L Lu G G Schwartz

Volume expansion and inotropic stimulation are used clinically to augment cardiac output during acute right ventricular (RV) pressure overload. We previously showed that a brief period of RV pressure overload causes RV free wall dysfunction that persists after normal loading conditions have been restored. However, the impact of volume expansion and inotropic stimulation on the severity of RV dy...

Journal: :Current opinion in critical care 2008
Dean R Hess Luca M Bigatello

PURPOSE OF REVIEW There has recently been renewed interest in the chest wall during mechanical ventilation, related to lung-protective ventilation strategies, as well as in the role of abdominal pressure in many facets of critical illness. The purpose of this review is to address relevant issues related to the chest wall and mechanical ventilation, particularly in patients with acute lung injur...

Journal: :Computer methods in biomechanics and biomedical engineering 2008
Christine M Scotti Jorge Jimenez Satish C Muluk Ender A Finol

Abdominal aortic aneurysm (AAA) rupture is the clinical manifestation of an induced force exceeding the resistance provided by the strength of the arterial wall. This force is most frequently assumed to be the product of a uniform luminal pressure acting along the diseased wall. However fluid dynamics is a known contributor to the pathogenesis of AAAs, and the dynamic interaction of blood flow ...

Journal: :Journal of the South African Veterinary Association 2001
A Olivier J Wannenburg R D Gottschalk M J van der Linde H T Groeneveld

A shoe was designed to combine the advantages of a reverse shoe and an adjustable heart bar shoe in the treatment of chronic laminitis. This reverse even frog pressure (REFP) shoe applies pressure uniformly over a large area of the frog solar surface. Pressure is applied vertically upward parallel to the solar surface of the frog and can be increased or decreased as required. Five clinically he...

Journal: :iranian journal of medical physics 0
s. shahbazi m. sc. in medical physics, tarbiat modares university, tehran, iran m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modares university, tehran, iran m. zarin optometrist, iran university of medical sciences, rassol hospital, tehran, iran m. mansori associate professor, ophthalmology dept., tehran university of medical sciences, farabbi hospital, tehran, iran

introduction: based on the invasive studies it has been shown that factors such as age, the progress of eye disorders, lens fibers compression and the biochemical changes of ocular matrix alter the physical characteristics and elastic properties of eye. in this study, a noninvasive method of estimating human eye elasticityis proposed and its relation with age and gender is evaluated using ultra...

Journal: :Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism 2017
Joseph Donnelly Marek Czosnyka Spencer Harland Georgios V Varsos Danilo Cardim Chiara Robba Xiuyun Liu Philip N Ainslie Peter Smielewski

Intracranial hypertension is a common final pathway in many acute neurological conditions. However, the cerebral haemodynamic response to acute intracranial hypertension is poorly understood. We assessed cerebral haemodynamics (arterial blood pressure, intracranial pressure, laser Doppler flowmetry, basilar artery Doppler flow velocity, and vascular wall tension) in 27 basilar artery-dependent ...

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