Surgery – Blood drawn and replaced or treated and returned to body – Constituent removed from blood and remainder returned to body
Patent
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.
Aall-Flood Kjell J.
Carlsson Per-Olof A. V.
Gambro AB
Pellegrino Stephen C.
Reilly Colleen M.
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