Bronchiopulmonary occlusion devices and lung volume...

A - Human Necessities – 61 – F

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A61F 2/04 (2006.01) A61B 17/12 (2006.01) A61B 17/24 (2006.01) A61F 2/20 (2006.01) A61M 16/00 (2006.01)

Patent

CA 2408923

Lung volume reduction is performed by the placement of a device (2) into a branch of the airway (34) to prevent air from entering that portion of lung. This will result in adsorption atelectasis of the distal portion of lung. The physiological response in this portion of lung is hypoxic vasoconstriction. The net effect is for a portion of lung to be functionally removed, i.e. a selected portion of lung is removed from both the circulation and ventilation. The build up of secretions is accommodated by using a valve (5, 15, 29) in the obstructive device, the valve opening upon coughing etc.

Selon l'invention, on effectue une réduction du volume du poumon en plaçant un dispositif (2) dans une branche d'une voie aérienne (34) de manière à empêcher l'air d'entrer dans cette partie du poumon, entraînant une atélectasie d'adsorption de la partie distale du poumon. La réponse physiologique dans cette partie du poumon est une vasoconstriction hypoxique. Le but final recherché est de supprimer de manière fonctionnelle une partie du poumon: une partie sélectionnée du poumon est retirée de la circulation et de la ventilation. L'accumulation des sécrétions est contenue par l'utilisation d'une valve (5, 15, 29) dans le dispositif obstructif, la valve s'ouvrant par la toux, etc.

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