Surgery – Blood drawn and replaced or treated and returned to body
Patent
1992-11-20
1994-11-29
Green, Randall L.
Surgery
Blood drawn and replaced or treated and returned to body
128DIG13, 604 5, 604 31, 36441301, A61M 3700
Patent
active
053685547
ABSTRACT:
A blood pumping system and method in which a selective backflow warning is generated in response to the detection of a backflow condition only in the absence of electrical interference that could cause the generation of a false backflow warning. Detection of a backflow condition is performed by activating the transmitter and receiver of a flow detector to determine the direction of blood flow and detection of the electrical interference is performed by activating the receiver of the flow detector while the transmitter is not activated. If electrical interference that could cause the generation of a false backflow warning exceeds a threshold, the system does not generate a backflow warning.
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A submission dated Jul. 16, 1991 by Sarns 3M Healthcare to the Food and Drug Administration regarding a Delphin II Centrifugal System embodying the invention disclosed in the above-identified patent application.
Agnew Marc H.
Mead Wilfred A.
Nazarian Richard A.
Schneider Daniel E.
Clarke Rob
Green Randall L.
Minnesota Mining and Manufacturing Company
ViaSat Incorporated
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