Apparatus for preventing back-flow of fluid in a blood filtering

Details Apparatus for preventing back-flow of fluid in a blood filtering Apparatus for preventing back-flow of fluid in a blood filtering

1986-09-22

1989-07-11

Pellegrino, Stephen C.

Surgery

Blood drawn and replaced or treated and returned to body

Constituent removed from blood and remainder returned to body

604 30, 604 45, 604246, 210136, 2103213, A61M 3700

Patent

active

048467871

ABSTRACT:
A blood filtering system includes a check valve for preventing fluid back-flow, coupled between a peristaltic pump and a pressure equalizer, the valve including a tubular container having an inlet and an outlet, two elongated plastic films in the container extending from the inlet facing each other, joined at their peripheries, with a hole in an end of one film proximate the container outlet. Fluid may flow from the inlet through the films to the outlet; but, back-flow is prevented by collapse of the films.

REFERENCES:
patent: 3046903 (1962-07-01), Jones
patent: 3064649 (1962-11-01), Fuson
patent: 3191600 (1965-06-01), Everett
patent: 3417750 (1968-12-01), Carson
patent: 3463159 (1969-08-01), Heimlich
patent: 3525357 (1970-08-01), Koreski
patent: 3649138 (1912-03-01), Clay et al.
patent: 4012217 (1977-03-01), Yakich
patent: 4650458 (1987-03-01), Dahlberg et al.

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