Automatic and position-sensitive syringe and method for nonaspir

Details Automatic and position-sensitive syringe and method for nonaspir Automatic and position-sensitive syringe and method for nonaspir

1987-07-06

1988-03-22

Coven, Edward M.

Surgery

Truss

Pad

128766, 604190, A61B 514, A61M 500

Patent

active

047321628

ABSTRACT:
A syringe for sampling blood has a handle driven plunger in which is mounted an air permeable filter in communication with a valve chamber. In the chamber is mounted a gravity driven steel ball that is heavy enough to enable the syringe to be used in aspiration, with the ball remaining seated to block the air flow through the valve, and yet light enough to be used in taking of a normal pressure arterial blood sample during which air flow through the filter will drive the ball from its seat.

REFERENCES:
patent: 3557778 (1971-01-01), Hughes
patent: 4099520 (1978-07-01), Decker et al.
patent: 4207870 (1980-06-01), Eldridge
patent: 4305406 (1981-12-01), Megahed
patent: 4317456 (1982-03-01), Percarpio
patent: 4424817 (1984-01-01), Williams
patent: 4448206 (1984-05-01), Martell
patent: 4466446 (1984-08-01), Baidwam et al.

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