Circulatory assist method and apparatus

Details Circulatory assist method and apparatus Circulatory assist method and apparatus

1988-03-31

1991-06-04

Kamm, William E.

Surgery

Truss

Perineal

128671, 128 28, 600 17, A61H 3102

Patent

active

050205161

ABSTRACT:
Improved cardiocirculatory assistance is provided to a patient by detecting the onset of ventricular ejection in the cardiac cycle of the patient and selectively increasing intrathoracic pressure of the patient in relative phase with respect to the onset of ventricular ejection. Cardiocirculatory output may be monitored and the relative phase of the increase in intrathoracic pressure with respect to the onset of ventricular ejection adjusted to maximize cardiac output. The intrathoracic pressure is increased once every N cardiac cycles where N is a positive integer. The patient interface may include apparatus for supplying high frequency respiration pulses in synchronism with the cardiac cycle. Alternately, or in addition, the pulses may be used to inflate a bladder in contact with the thorax.

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