Patent ID: 7025750
Filing Date: 2006-04-11
Classification: A61M

Abstract:
1. A tubular medical set for the transfer of blood, said set having main blood flow tubing and a flexible branch tube connected in branching relation to the main tubing for connection to a source of physiological, cell-free solution and for retaining a blood-solution interface, said set further comprising a device to suppress pressure pulses tending to disrupt said blood-solution interface in said branch tube while allowing the transfer of pressure across said pressure pulse suppression means at essentially all times and permitting at any time the relatively unrestricted flow of said cell free solution through said branch tubing to the main blood flow tubing, said device to suppress pressure pulses comprising a moveable member that freely, by action of flowing fluid, moves through a range of positions, said device to suppress pressure pulses being designed to permit fluid flow in the direction opposed to said relatively unrestricted flow of said cell free solution in an amount 1 to 50 percent of the magnitude of said relatively unrestricted flow at maximum rate, under conditions of normal use.