Wall shear stress assessment in the common carotid artery of end-stage renal failure patients

被引:15
作者
Samijo, SK
Barkhuysen, R
Willigers, JM
Leunissen, KML
Ledoux, LAF
Kitslaar, PJEHM
Hoeks, APG
机构
[1] Cardiovasc Res Inst, Dept Biophys, NL-6200 MD Maastricht, Netherlands
[2] Cardiovasc Res Inst, Dept Surg, NL-6200 MD Maastricht, Netherlands
[3] Cardiovasc Res Inst, Dept Internal Med, NL-6200 MD Maastricht, Netherlands
关键词
common carotid artery; hemodialysis; hematocrit; ultrasound; wall shear stress; wall shear rate; whole blood viscosity;
D O I
10.1159/000064085
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
Under physiological circumstances in the common carotid artery (CCA), mean wall shear stress (WSS), defined as mean wall shear rate (WSR) times local whole blood viscosity (WBV), is maintained at approximately 1.5 Pa. In patients with end-stage renal failure (ESRF) whole blood viscosity is low and it is not unlikely that mean WSS is lower in these patients than in control subjects. Moreover, hemodialysis causes an acute increase in blood viscosity with possible effects on WSS. In this study WSS in the CCA was determined with the Shear Rate Estimating System, an apparatus based on ultrasound, in ESRF patients (n = 13) and in presumed healthy age- and sex-matched control subjects (n = 13). Prior to hemodialysis, mean WSS (0.67 +/- 0.23 Pa) was significantly lower (p < 0.05) in patients with ESRF, due to both a lower WBV (2.80 +/- 0.52 mPa.s) and mean WSR (271 +/- 109 s(-1)), than in the control subjects (mean WSS: 1.24 +/- 0.20 Pa; WBV: 3.20 +/- 0.29 mPa.s; WSR: 387 +/- 51 s(-1)). Hemodialysis induced an increase in WBV (up to 3.71 +/- 1.54 mPa.s, p < 0.01), but mean WSS did not change significantly due to a reciprocal decrease in mean wall shear rate. These findings demonstrate that WSS is lower in hemodialysis patients than in control subjects, and that mean WSS is maintained at this low level despite an kacute change in blood viscosity. Copyright (C) 2002 S. Karger AG, Basel.
引用
收藏
页码:557 / 563
页数:7
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