Automated means to remove air from venous blood during CPB

Surgery – Container for blood or body treating material – or means used... – Filter or series thereof for liquid entering or leaving...

Reexamination Certificate

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Details

C604S006150, C422S044000, C128SDIG008

Reexamination Certificate

active

07131966

ABSTRACT:
Venous reservoirs are interposed between the patient and the arterial pump and serve to remove air bubbles and provide compliance that accommodates variations in the volume of blood circulating in the extracorporeal circuit during cardiopulmonary bypass (CPB). The invention is a reservoir that incorporates automated means to remove air bubbles from the venous line prior to the blood entering the arterial blood pump. In another form, the reservoir includes means that handles foam prior to the blood entering the blood pump. In yet another form, the invention is means that improve air removal in a soft shell venous reservoir. These features are applicable to CPB circuits using gravity drainage or vacuum assisted venous drainage.

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Sistino JJ, Michler RE, and Mongero, LB Laboratory evaluation of a low prime closed-circuit cardiopulmonary bypass system. J Extra Corpor Technol. 1993;24(4):116-9.

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