✦ LIBER ✦

Effect of flow on the resistance of modelled femoral artery stenoses

✍ Scribed by Mr S. R. Dodds; N. K. Bourne; A. D. B. Chant

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 521 KB
Volume: 83
Category: Article
ISSN: 0007-1323
DOI: 10.1002/bjs.1800830723

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

An accurate model of the pressure-flow relationship of a stenosis is necessary for the correct interpretation of haemodynamic measurements. Modelled femoral artery stenoses were tested in vitro and the pressure drop: flow ratio (resistance) was most accurately represented by a fixed component (Rf) combined with a variable component (Rv) that increased linearly with flow (Q) such that Rv = SvQ. For stenoses of 68–94 per cent area, Rfincreased from 3·2 to 77·7 milliperipheral resistance units (mPRU), while Sv increased from 0·009 to 0·578 mPRU ml−1 min and Rv was dominant for physiological flow rates. It was concluded that the approximation of a significant stenosis to a fixed resistance is incorrect.

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