Arterial blood velocity to volume flow converter

Surgery – Truss – Pad

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128667, 128672, 128713, 7386125, A61B 1000

Patent

active

046676783

ABSTRACT:
A arterial blood velocity-to-volume flow rate converter, including a pair of function generators a computer, and a multiplier, is incorporated within a system to objectively measure by non-invasive means the blood volume flow rate to the head of an occupant in a rapidly accelerating vehicle, and take corrective measures to stabilize the vehicle when that flow falls below a preselected lower limit for a predetermined length of time. A conventional ultrasonic Doppler velocimeter determines the blood velocity, subsequently feeding a representative signal to pressure function generator. The output therefrom is then fed to a cross-sectional area signal generator which determines the time-varying area of the artery, a signal representing such being fed to the multiplier along with the velocity signal to compute the flow. When that flow falls below a pre-selected lower limit for a predetermined length of time as determined by a comparator and timer, a command signal is sent to override circuitry to stablize the vehicle.

REFERENCES:
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patent: 4257278 (1981-03-01), Papadofrangakis et al.
patent: 4336808 (1982-06-01), Ohno et al.
patent: 4370985 (1983-02-01), Takeichi et al.
patent: 4391148 (1983-07-01), Sainz et al.
patent: 4493216 (1985-01-01), Hassler
Horton, "Blood Flow and Pressure Measurement", IBM Technical Disclosure Betin, vol. 13, No. 9, Feb. 1971, pp. 2471-2472.

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