Fast response intra-aortic balloon pump

Details Fast response intra-aortic balloon pump Fast response intra-aortic balloon pump

A - Human Necessities

61

M

A61M 1/00 (2006.01) A61M 1/10 (2006.01)

Patent

CA 2377975

An intra-aortic balloon pump (100, 200, 300, 400, 500, 600) includes a balloon (110), a catheter (112) having a relatively small diameter lumen and an extender (114) having a relatively large diameter lumen connected in series. A valve (125, 325, 442/446, 675) is positioned in the extender adjacent the end of the extender connected to the catheter. The valve enables the extender to be pressurized with a working gas prior to inflation of the balloon and to be evacuated prior to deflation of the balloon. A second valve (227, 327, 440/444) adjacent the opposite end of the extender permits the intra-aortic balloon pump to commence a pre-inflation step or a pre-deflation step without affecting the pressure in the extender. Separate positive pressure (314, 414) and negative pressure (315, 415) extenders may be provided to reduce the movement of the working gas during inflation and deflation cycles, thereby increasing pneumatic efficiency.

L'invention concerne une pompe à ballonnet intra-aortique (100, 200, 300, 400, 500, 600), qui comprend un ballonnet (110), un cathéter (112) à lumière de diamètre relativement petit, et une rallonge (114) à lumière de diamètre relativement large, montée en série. Un clapet (125, 325, 442/446, 675) est placé adjacent à l'extrémité de la rallonge reliée au cathéter. Ledit clapet permet à la rallonge d'être pressurisée avec un gaz de travail, avant le gonflement du ballonnet, et d'être mis sous vide avant le dégonflement du ballonnet. Un second clapet (227, 327, 440/444), adjacent à l'extrémité opposée de la rallonge, permet à la pompe à ballonnet intra-aortique de lancer un processus de prégonflement ou de prédégonflement, sans affecter la pression dans la rallonge. Des rallonges séparées à pression positive (314, 414) ou à pression négative (315, 415) peuvent être ajoutées, de manière à limiter le déplacement du gaz de travail pendant les cycles de gonflement et de dégonflement, ce qui permet d'augmenter l'efficacité pneumatique.

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