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- Title
Effect of flow on the resistance of modelled femoral artery stenoses.
- Authors
Dodds, S. R.; Bourne, N. K.; Chant, A. D. B.
- 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 = Sv Q. 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.
- Publication
British Journal of Surgery, 1996, Vol 83, Issue 7, p957
- ISSN
0007-1323
- Publication type
Article
- DOI
10.1002/bjs.1800830723