Arterial Wall Compliance after Diode Laser Assisted Microanastomosis: A Comparative Study with Conventional Manual Microanastomosis on the Rabbit Femoral Artery

2000 ◽  
Vol 15 (3) ◽  
pp. 207-213 ◽  
Author(s):  
R.G. Demaria ◽  
F.M. Lhôte ◽  
M.M. Dauzat ◽  
M.C. Oliva-Lauraire ◽  
J.M. Juan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Diode Laser ◽  
Femoral Artery ◽  
Arterial Wall ◽  
Wall Compliance

Evaluation of Hemodynamics in a Prestressed and Compliant Tapered Femoral Artery Using an Optimization-Based Inverse Algorithm

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Rupak K. Banerjee ◽  
Gavin A. D'Souza ◽  
Anup K. Paul ◽  
Ashish Das
Keyword(s):  
Femoral Artery ◽  
Arterial Wall ◽  
Outer Diameter ◽  
Inverse Algorithm ◽  
Physiological Level ◽  
Wall Properties ◽  
Pulsatile Pressure ◽  
Wall Property ◽  
Wall Compliance

The important factors that affect the arterial wall compliance are the tissue properties of the arterial wall, the in vivo pulsatile pressure, and the prestressed condition of the artery. It is necessary to obtain the load-free geometry for determining the physiological level of prestress in the arterial wall. The previously developed optimization-based inverse algorithm was improved to obtain the load-free geometry and the wall prestress of an idealized tapered femoral artery of a dog under varying arterial wall properties. The compliance of the artery was also evaluated over a range of systemic pressures (72.5–140.7 mmHg), associated blood flows, and artery wall properties using the prestressed arterial geometry. The results showed that the computed load-free outer diameter at the inlet of the tapered artery was 6.7%, 9.0%, and 12% smaller than the corresponding in vivo diameter for the 25% softer, baseline, and 25% stiffer arterial wall properties, respectively. In contrast, the variations in the prestressed geometry and circumferential wall prestress were less than 2% for variable arterial wall properties. The computed compliance at the inlet of the prestressed artery for the baseline arterial wall property was 0.34%, 0.19%, and 0.13% diameter change/mmHg for time-averaged pressures of 72.5, 104.1, and 140.7 mmHg, respectively. However, the variation in compliance due to the change in arterial wall property was less than 6%. The load-free and prestressed geometries of the idealized tapered femoral artery were accurately (error within 1.2% of the in vivo geometry) computed under variable arterial wall properties using the modified inverse algorithm. Based on the blood-arterial wall interaction results, the arterial wall compliance was influenced significantly by the change in average pressure. In contrast, the change in arterial wall property did not influence the arterial wall compliance.

Comparative study between intrahemorrhoidal diode laser treatment and Milligan–Morgan hemorrhoidectomy

2019 ◽  
Vol 32 (2) ◽  
pp. 560 ◽  
Author(s):  
IbrahimEI Salem ◽  
AllaA Alsisy ◽  
YahiaM Alkhateep
Keyword(s):  
Comparative Study ◽  
Laser Treatment ◽  
Diode Laser

scholarly journals In vivo femoropopliteal arterial wall compliance in subjects with and without lower limb vascular disease

1999 ◽  
Vol 30 (5) ◽  
pp. 936-945 ◽  
Author(s):  
Nigel R.M. Tai ◽  
Alberto Giudiceandrea ◽  
Henryk J. Salacinski ◽  
Alexander M. Seifalian ◽  
George Hamilton
Keyword(s):  
Vascular Disease ◽  
Lower Limb ◽  
Arterial Wall ◽  
Wall Compliance

Acoustics and Computational Models for Diagnosing Arterial Blockages

2013 ◽  
Author(s):  
M. A. Al-Rawi ◽  
A. M. Al-Jumaily
Keyword(s):  
Blood Pressure ◽  
Wave Propagation ◽  
Femoral Artery ◽  
Computational Models ◽  
Arterial Wall ◽  
Fluid Dynamic ◽  
Arterial Disease ◽  
Flow Profile ◽  
Cfd Model ◽  
Wall Displacement

Arterial blockages can occur in small or large arteries for a variety of reasons, such as obesity, stress, smoking and high cholesterol. This paper presents a feasibility study on a novel method to detect the behaviour of the blood pressure wave propagation for arteries in both healthy and diseased conditions in order to develop a relatively inexpensive method for early detection of arterial disease. The trend of this behaviour is correlated to the early development of the arterial blockage at various locations. Invasive sets of data (gathered from experiments performed on animals) are implemented into a 3D Computational Fluid Dynamic (CFD) model to determine how the arterial wall compliance changes when any abnormalities occur to the blood flow profile. At the same time, a 1D acoustical model is developed to transfer the information gathered (wave propagation for blood pressure, flow and arterial wall displacement) from the CFD model. Wave forms were collected at a location which was invasively accessible (the femoral artery). The computational and acoustical models are validated against the clinical trials and show good agreement. Any changes to the arterial wall displacement could be detected by systolic and diastolic blood pressure values at the femoral artery.

Misinterpretation of the Functional Severity of Coronary Stenosis Due To Variability in Arterial Wall Compliance

2010 ◽  
Author(s):  
Bhaskar Chandra Konala ◽  
Ashish Das ◽  
Mohamed Effat ◽  
Arif Imran ◽  
Rupak K. Banerjee
Keyword(s):  
Arterial Wall ◽  
Coronary Intervention ◽  
Diagnostic Parameter ◽  
Carreau Model ◽  
Newtonian Viscosity ◽  
Coronary Stenoses ◽  
Wall Compliance ◽  
Wall Interaction ◽  
Stenotic Arteries ◽  
Parameter Values

Effect of arterial wall compliance on the invasive coronary diagnostic parameters for various severities of coronary stenoses was assessed. The Mooney-Rivlin model was used to define the non-linear properties of the arterial wall and the plaque regions. The non-Newtonian viscosity of blood was modeled using the Carreau model. A finite element method was employed to solve the pulsatile fluid (blood)-structure (arterial wall) interaction (FSI) equations. Variability in the diagnostic parameter values can occur near the cut-off value due to change in compliance of stenotic arteries between the range of 84% and 89% area stenosis. This may lead to misdiagnosis and might wrongly lead to postponement of coronary intervention.

Comparative study of 980nm diode laser and 810nm diode laser to skin and mucosa vascular lesions and benign growths

2010 ◽  
Author(s):  
H. X. Qiu ◽  
Y. Gu ◽  
Y. Wang ◽  
J. Zeng ◽  
N. Y. Huang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Diode Laser ◽  
Vascular Lesions
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