Patent ID: 9737421
Date: 2017-08-22
CPC Classifications: A61F,Y10T

Claim:
1. A method of inducing helical flow comprising the use of helical flow inducing tubing comprising at least two internal helical ridges, at least two internal helical grooves, or both at least two internal helical ridges and at least two internal helical grooves, configured in such a fashion as to eliminate or reduce turbulence in the tubing, wherein, at each of at least one cross-section of the tubing, taken on a plane normal to the longitudinal axis of the tubing, each helical ridge, each groove, or each helical ridge and each groove is located at a different point of the circumference of the tubing wherein at least one of the internal helical ridges and grooves, have a helix angle of 5 to 50 degrees, and wherein the helical flow inducing tubing comprises blood flow tubing.