Non-invasive aortic blood flow sensor and method for non-invasiv

Details Non-invasive aortic blood flow sensor and method for non-invasiv Non-invasive aortic blood flow sensor and method for non-invasiv

1992-05-12

1994-03-01

Cohen, Lee S.

Surgery

Truss

Pad

128691, 128672, A61B 500

Patent

active

052898237

ABSTRACT:
A non-invasive aortic blood flow sensor is disclosed. The sensor determines the blood flow in the aorta of a patient based on the pressure difference between the right and left subclavian arteries. The pressure of the subclavian arteries is non-invasively measured by determining the blood pressures in the arteries of the patient's right and left arms by means of tonometric blood pressure sensors. The signals from the tonometric sensors are first equalized to account for any pressure waveform distortion due to propagation of the pulse from the aorta to the sensor locations. Next, a correction is made for DC offset. The modified pressure signals are then compared, and the pressure difference determined. The blood flow is determined from the pressure difference by known pressure/flow relationships.

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