Fluid handling – Diverse fluid containing pressure systems – Main line flow displaces additive from shunt reservoir
Patent
1980-06-17
1983-02-08
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Main line flow displaces additive from shunt reservoir
128276, A61M 100
Patent
active
043723365
ABSTRACT:
An improved, four-chamber chest drainage system include (1) a collection chamber for collecting blood and other liquids to be drained from the pleural cavity of a patient, (2) an underwater seal chamber for preventing contamination of the patient's pleural cavity by atmospheric air, (3) a manometer chamber for accurately indicating the negative pressure in the patient's pleural cavity, and (4) a suction control chamber for regulating the amount of negative pressure (or suction) applied to the patient's pleural cavity. The suction control chamber has a flexible diaphragm adapted to flex in response to increased negativity above a predetermined level to block the opening to the suction source until the negativity returns to the predetermined level. A combination vent valve-and-filter assembly permits ready venting of the collection chamber to filtered atmospheric air.
REFERENCES:
patent: 3052064 (1962-09-01), Kaeser
patent: 3363626 (1968-01-01), Bidwell
patent: 3610478 (1971-10-01), Johnston
patent: 3945392 (1976-03-01), Deaton
patent: 4261362 (1981-04-01), Kurtz et al.
patent: 4275997 (1981-06-01), Woodring
Cornell William D.
Crouther Ronald
Dyer Howard P.
Ranford Alan B.
Cohan Alan
Gardner Paul L.
Sherwood Medical Industries Inc.
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