A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
103/32, 128/81
A61M 5/00 (2006.01) A61M 1/10 (2006.01) F04B 43/02 (2006.01)
Patent
CA 1176933
ABSTRACT OF THE DISCLOSURE A positive displacement pump for delivery of blood, or the like, from patients to an extracorporeal circuit, for purification, as in hemodialysis treatments. The pump is small, and sufficiently inexpensive to be discarded after one use. The pump comprises a single blood chamber attached to inlet and outlet conduits separated from the chamber and each other by low resistance flapper valves. The flapper valves are integral with a flexible diaphragm which forms one side of the blood chamber and are operative to close the outlet valve and to open the inlet valve to fill the blood cavity responsive to withdrawal of the diaphragm from the blood chamber cavity and to reverse each valve upon penetration of the diaphragm into the blood chamber to deliver uniformly small increments of blood to an artificial kidney or other blood treatment device.
405794
Cd Medical Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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