Patent ID: 8540617
Filing Date: 2013-09-24
Classification: A01N,A61M

Abstract:
1. An extracorporeal pumping method comprising: receiving an inlet fluid into a compressible-expandable bladder sealably mounted within a housing; moving an actuating member mounted within a fluid chamber of a hydraulic actuating sub-assembly, the fluid chamber containing a pressure transmissive fluid, and displacing transmissive fluid from the fluid chamber into the housing; compressing a volume of the bladder in the housing the transmissive fluid displaced into the housing, the compressed bladder ejecting the inlet fluid from the bladder to provide an outlet fluid under pulsatile pressure; introducing the outlet fluid into a blood vessel and thereby pumping blood through the blood vessel under the pulsatile pressure; moving the actuating member within the fluid chamber and returning the displaced transmissive fluid from the housing into the fluid chamber; expanding the compressed bladder in the housing and receiving additional inlet fluid into the bladder; and controlling the movement of the actuating member such that the outlet fluid exhibits a predetermined pulse rate, stroke volume, and upstroke rise time.