Surgery – Means and methods for collecting body fluids or waste material
Patent
1995-06-07
1998-03-03
Rimell, Sam
Surgery
Means and methods for collecting body fluids or waste material
604 4, 604321, A61M 100
Patent
active
057229643
ABSTRACT:
A blood collection vessel includes a blood inlet, a pooling region in which blood from the inlet collects, and an outlet in the pooling region for reinfusion of the collected blood. A filter located in the blood path between inlet and outlet extends at least in part into the pooling region and impounds clots so they remain away from the outlet but suspended in the collected blood. Preferably, the filter is located to provide venting between both sides of the filter. In one embodiment the filter is a vertical wall, which defines a shielded outlet column or chimney extending above the outlet. Blood permeates to the outlet region over a broad area, and the column forms an open suction path that prevents suction differentials from arising across the filter, so clots cannot be sucked through the large-pore material. With the clots residing in the collected fluid, the total fluid loss is directly displayed in a single window at all times, and maximal use is made of the limited volume in the vessel. In another embodiment, the filter constitutes a false floor or basket in the pooling region. A preferred construction employs filter material on a support grid, to form a flexible and self-supporting filter sheet, which inserts like a plate to compartmentalize the collection vessel and form an impounding surface in the pooling region.
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"Pleur-Evac: Cardiotomy Reservoir Autotransfusion System" brochure, 1994.
"Pleur-Evac Plus A-9350" photograph of product, 1995.
Herweck Steve A.
Karwoski Theodore
Want Nicholas
Atrium Medical Corporation
Rimell Sam
Yeh Luke
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