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

A - Human Necessities

61

F

A61F 5/441 (2006.01) A61F 5/445 (2006.01)

Patent

CA 2211814

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.

Cette invention concerne un sac d'ostomie qui comporte un dôme en plastique souple à mémoire de forme fixé à sa paroi intérieure à l'endroit d'un évent. Le pourtour du dôme, espacé de son sommet, comporte au moins une fente radiale dans le plan du dôme. Cette fente est incurvée ou arquée vers le sommet du dôme et définit des lèvres intérieure et extérieure dont les rives opposées sont normalement juxtaposées pour empêcher les gaz de s'échapper du sac sauf lorsque le sommet du dôme est enfoncé par pression axiale sur ce dernier. Les lèvres présentent avantageusement des surfaces opposées biseautées, la surface de la lèvre extérieure étant généralement orientée vers l'évent et celle de la lèvre intérieure étant généralement orientée dans le sens opposé. Une butée prévue sur la face intérieure du dôme se trouve dans le prolongement imaginaire d'un filtre à gaz désodorisant disposé à la base dudit dôme et sert à limiter la déformation de celui-ci et à empêcher l'occlusion du filtre lorsque le sommet du dôme est enfoncé pour ouvrir le clapet de l'évent.

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