Vented ostomy pouch and self-closing valve therefor

Details Vented ostomy pouch and self-closing valve therefor Vented ostomy pouch and self-closing valve therefor

1996-11-21

1997-12-02

Clarke, Robert A.

Surgery

Means and methods for collecting body fluids or waste material

Receptacle attached to or inserted within body to receive...

604332, 128DIG24, A61F 544

Patent

active

056930356

ABSTRACT:
An ostomy pouch is disclosed in which a flexible, shape-recoverable plastic dome is secured internally to a wall of the pouch over a vent opening. A peripheral portion of the dome spaced from the apex is provided with at least one slit therethrough traversing a radially and axially extending plane of the dome. The slit is curved or arched towards the apex and defines outer and inner lips that normally have their opposing edges in juxtaposition to restrain the escape of gases from the pouch but permit such escape in quantity when the apical portion of the dome is depressed (by axially squeezing the dome). The lips advantageously have beveled opposing surfaces with the surface of the outer lip generally facing towards the vent opening and that of the inner lip generally facing away from the vent opening. A stop element projects from the apical portion within the dome and is engagable with a deodorizing gas filter located at the base of the dome to limit the extent of deformation of the dome, and to prevent occlusion of the filter by the reverted apical portion of the dome, when the dome is pressed inwardly to open the valve.

REFERENCES:
patent: 3759260 (1973-09-01), Nolan et al.
patent: 4203445 (1980-05-01), Jessup et al.
patent: 4274848 (1981-06-01), La Gro
patent: 4449970 (1984-05-01), Bevan et al.
patent: 5185008 (1993-02-01), Lavender
patent: 5250042 (1993-10-01), Torgalkar et al.
patent: 5401264 (1995-03-01), Leise

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