Multi-function medical control valve assembly

Details Multi-function medical control valve assembly Multi-function medical control valve assembly

1999-03-15

2000-11-07

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604118, 604119, 604129, 604246, 1375123, A61M 500

Patent

active

061429805

ABSTRACT:
The invention is directed to a multi-function control valve assembly for use in aspirating the left ventricle of the heart during open heart bypass surgery. The control valve assembly includes a housing assembly which defines an inlet adapted for connection to a suction tube inserted into the left ventricle and an outlet adapted for connection to a pump. The control valve assembly further includes a valving arrangement that is operable to provide three distinct functions. First, the control valve assembly includes a unidirectional flow valve which is operable to only permit fluid to flow from the inlet to the outlet, thereby preventing a reverse flow situation. Second, the control valve assembly includes a positive pressure relief valve which is operable to vent the outlet when the pressure therein exceeds a predetermined positive pressure value. Third, the control valve assembly includes a vacuum relief valve which is operable to draw ambient air into the outlet when the pressure therein exceeds a predetermined negative pressure value. As an additional feature, the vacuum relief valve is adjustable for permitting the predetermined negative pressure value to be selectively regulated.

REFERENCES:
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patent: 4502502 (1985-03-01), Krug
patent: 4642097 (1987-02-01), Siposs
patent: 4671786 (1987-06-01), Krug
patent: 4725266 (1988-02-01), Siposs
patent: 4758224 (1988-07-01), Siposs
patent: 5401255 (1995-03-01), Sutherland et al.
patent: 5419366 (1995-05-01), Johnston
patent: 5707356 (1998-01-01), Paul

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