Mechanical auxiliary ventricle blood pump with reduced waist...

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/12 (2006.01) A61M 1/10 (2006.01)

Patent

CA 2382671

An apparatus adapted to be inflated and deflated in response to selective communication with a source of pressurized fluid includes a bladder having a semi-rigid shell body portion (14) and a relatively thin membrane (24) portion defining an inflatable chamber (26). The elongate semi-rigid shell body preferably includes a contoured, concave inner surface (16) terminating at a peripheral side edge (18). At least one passage (20) extends through the shell body defining an opening in the inner surface of the shell body. The flexible membrane is continuously bonded to the shell body adjacent the peripheral side edge to define the enclosed inflatable chamber in communication with the passage. The membrane has a reduced waist portion (28) defining a membrane tension zone adjacent the opening of the passage into the chamber to reduce the probability of occluding the entrance while deflating the chamber.

L'invention concerne un dispositif conçu pour être gonflé et dégonflé en réponse à une communication sélective avec une source d'un fluide sous pression. Ce dispositif comprend une cavité pourvue d'une partie de corps d'enveloppe semi-rigide et d'une partie de membrane relativement fine définissant une chambre gonflable. Le corps d'enveloppe semi-rigide allongé comprend de préférence une surface interne concave profilée prenant fin au niveau d'un bord latéral périphérique. Au moins un passage traverse ce corps d'enveloppe, dont la surface interne est pourvue d'une ouverture. La membrane souple est continûment reliée au corps d'enveloppe adjacent au bord latéral périphérique, et définit la chambre gonflable fermée en communication avec ledit passage. Cette membrane comprend une partie médiane réduite définissant une zone de tension membranaire adjacente à l'ouverture du passage conduisant à la chambre, d'où une réduction du risque d'occlusion de l'entrée lors du dégonflement de la chambre.

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