Surgery – Means and methods for collecting body fluids or waste material – Aspiration collection container or trap
Patent
1986-09-19
1988-05-31
Rosenbaum, C. Fred
Surgery
Means and methods for collecting body fluids or waste material
Aspiration collection container or trap
137205, A61M 100
Patent
active
047478446
ABSTRACT:
This invention relates to a novel and improved chest drainage apparatus characterized by a bottle housing a fluid collection chamber and a fluid inlet connectable to receive fluid and air from a chest cavity to be drained, air inlet and exhaust ports downstream of the fluid inlet open to the atmosphere within the air space above the fluid collected, and a U-tube between the fluid inlet and the air exhaust port capable of collecting and retaining an amount of fluid effective to provide a visual indication of any air flow into the system; a subassembly including an air chamber containing a check valve effective when connected to receive air from the exhaust port of the bottle to prevent the backflow thereof into the system; and a negative pressure relief valve connected to the air intake port automatically operative to limit the negative pressure, if any, in the air space above the fluid to a predetermined maximum. The invention also encompasses such an apparatus wherein the subassembly is detachable from the bottle and the latter is used by itself in inverted position as a reservoir of chest fluids that may be reintroduced back into the body. Also included in the apparatus in its preferred form are a positive pressure relief valve downstream of the check valve in the air chamber automatically operative to maintain the air pressure in the latter at or below a predetermined maximum. Additional novel features are those which permit removal of some of the collected fluid either for the purpose of analysis or to extend the capacity thereof.
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C. R. Bard Inc.
Kruter J. L.
Rosenbaum C. Fred
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