Chest drainage unit

Details Chest drainage unit Chest drainage unit

A - Human Necessities

61

M

128/106

A61M 1/00 (2006.01)

Patent

CA 1168540

ABSTRACT OF THE DISCLOSURE An improved, four-chamber chest drainage system includes (1) a collec- tion chamber for collecting blood and other liquids to be drained from the pleural cavity of a patient, (2) an underwater seal chamber for preventing con- tamination 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 con- trol 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.

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