Controlled pneumatic driving system

Details Controlled pneumatic driving system Controlled pneumatic driving system

1995-10-18

1998-06-02

Bahr, Jennifer

Surgery

Cardiac augmentation

Aortic balloon pumping

A61N 1362

Patent

active

057591482

ABSTRACT:
The invention is a system for inflating and deflating an intra-aortic balloon through an isolating safety chamber, which utilizes a flexible element to separate the balloon actuating gas from the driving air in a closed balloon circuit. Pressure and vacuum are supplied by separate pressure and vacuum stages, which are driven by the same shaft. The shaft speed is varied to control one of the pressures at a selected value, whereby the other pressure is maintained at a constant value within an allowable band.

REFERENCES:
patent: 3698381 (1972-10-01), Federico et al.
patent: 4016871 (1977-04-01), Schiff
patent: 5217430 (1993-06-01), Mushika
patent: 5300017 (1994-04-01), Isoyama et al.

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