Hydrophobic filter protector for wound drainage system

Details Hydrophobic filter protector for wound drainage system Hydrophobic filter protector for wound drainage system

1990-09-05

1992-10-20

Isabella, David J.

Surgery

Means and methods for collecting body fluids or waste material

Aspiration collection container or trap

604317, A61M 100

Patent

active

051566028

ABSTRACT:
Apparatus for collecting body liquids from a patient comprises a reservoir connectible to a patient to collect body liquids therefrom. A filter in the reservoir is interposed between an air vent and a liquid receiving zone in the reservoir. The filter faces generally upward within a chamber which is disposed near the top of the reservoir and is closed to the reservoir except for at least one restrictive orifice communicating between the reservoir and the top of the chamber. The restrictive orifice opens to the reservoir near the top of a boss upstanding from the top of the chamber and opens to the chamber at a location radially outboard of the filter. A barrier depends from the top of the chamber radially between the restrictive orifice and filter. A bowl supports the filter and has a bottom spaced above the bottom of the chamber to define a liquid receiving sump therebetween. The bowl has a peripheral wall upstanding from the bottom wall thereof and rising above the top of the filter at a location radially inboard of the barrier. To gain contact with the filter, liquid from the reservoir must rise above the top of the chamber sufficient to overflow the boss, pass downward through the restrictive orifice in the boss pass the barrier and fill the sump sufficient to overflow the top of the bowl peripheral wall.

REFERENCES:
patent: 3768478 (1973-10-01), Fertik et al.
patent: 4111204 (1978-09-01), Hessel
patent: 4228798 (1980-10-01), Deaton
patent: 4465485 (1984-08-01), Kashmer et al.
patent: 4487606 (1984-12-01), Leviton et al.
patent: 4561558 (1985-12-01), Richman et al.
patent: 4561868 (1985-12-01), von Reis et al.
patent: 4569674 (1986-02-01), Phillips et al.
patent: 4655754 (1987-04-01), Richmond et al.
patent: 4826494 (1989-05-01), Richmond et al.

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