Device for connecting a respirator to a patient

A - Human Necessities – 61 – M

Patent

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Details

A61M 16/04 (2006.01) A61M 16/20 (2006.01)

Patent

CA 2569668

Disclosed is a device (1) for connecting a respirator to a patient, comprising a breathing tube (4) that can be introduced into the patient's trachea, can be impinged upon by the breathing gas, and is provided with an inflatable cuff (8) near the distal end (6) thereof. A connecting tube (10) is joined to an elastic compressed air reservoir while a three-way valve (16) is mounted therebetween. Said valve (16) acts as a check valve at the inlet (20) while acting as a control valve for maintaining a constant pressure in the cuff by compensating between the cuff (8) and the compressed air reservoir (14). The valve (16) is embodied as a three-way check valve and a differential pressure valve (22). Said valve (22) is provided with at least two outlets (24, 26) encompassing one respective associated differential force chamber (28, 30) while the inlet (20) is provided with a third differential force chamber (32). The differential force chambers (28, 30, 32) are sealingly separated from each other by means of an elastic membrane disk (34). The first outlet (24) is joined to the connecting tube (10) while the second outlet (26) is joined to the compressed air reservoir (14).

La présente invention concerne un dispositif (1) pour relier un appareil respiratoire au patient, comprenant un tube respiratoire (4) qui peut être inséré dans la trachée du patient, et peut recevoir du gaz respiratoire, ledit tube étant doté d'un brassard gonflable (8) à proximité de son extrémité distale (6). Une conduite de liaison (10) est reliée à un réservoir d'air comprimé élastique, et une valve à trois voies (16) est connectée entre ces éléments. La valve (16) sert de valve de retenue à l'entrée (20), et de valve de commande permettant le maintien d'une pression constante dans le brassard au moyen d'un équilibre entre le brassard (8) et le réservoir d'air pressurisé (14). La valve (16) se présente sous la forme d'une valve de retenue à trois voies à pression différentielle (22). La valve (22) présente au moins deux sorties (24, 26) comprenant respectivement une chambre à force différentielle associée (28, 30), et l'entrée (20) présente une troisième chambre à pression différentielle (32). Les chambres à pression différentielle (28, 30, 32) sont séparées de façon étanche entre elles par un disque de membrane élastique (34), la première sortie (24) étant raccordée à la conduite de liaison (10) et la seconde sortie (26) étant raccordée au réservoir d'air pressurisé (14).

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