Ventricular assist device with pre-formed inflation bladder

Details Ventricular assist device with pre-formed inflation bladder Ventricular assist device with pre-formed inflation bladder

A - Human Necessities

61

M

A61M 1/10 (2006.01)

Patent

CA 2349627

A ventricular assist device (10) is designed to assist a heart to pump blood by applying uniform pressure to a majority portion of an exterior ventricular surface of the heart. A specially configured bladder (14) is utilized to apply the pressure, and is prefabricated in an inflated, unfolded configuration to reduce wall stresses in the bladder when inflated. The inflatable bladder may also comprise a plurality of individually inflatable compartments (18). The compartments may have different dimensions to complement the dimensions of corresponding segments of the heart, and may be inflated at different times or at different pressures based upon the determined needs of the heart.

Selon cette invention, un dispositif d'assistance ventriculaire (10) est conçu pour aider le coeur à pomper le sang par l'application d'une pression uniforme à une partie majeure d'une surface ventriculaire externe du coeur. Pour appliquer une pression, on utilise une vessie à configuration spéciale (14), préfabriquée sous forme gonflée et non dépliée afin de réduire les contraintes exercées sur les parois de la vessie à l'état gonflé. La vessie gonflable peut également comprendre plusieurs compartiments (18) gonflables un par un. Ces compartiments peuvent avoir des dimensions différentes, choisies pour s'adapter à celles des parties correspondantes du coeur; ils peuvent être gonflés à différents moments ou avec des pressions différentes, en fonction des besoins déterminés du coeur.

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