An artificial or modified natural blood flow tubing has a helical-flow inducer to induce helical flow in such fashion as to eliminate or reduce turbulence. One inducer is a tubular stent of expansible mesh having a helical vane.

 
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> Mounting assembly for a stent and a method of using the same to coat a stent

> Highly porous self-cohered web materials having haemostatic properties
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