Instrument to detect and represent the cross-sectional variation

Details Instrument to detect and represent the cross-sectional variation Instrument to detect and represent the cross-sectional variation

1986-01-23

1988-07-19

Jaworski, Francis J.

Surgery

Truss

Pad

A61B 1000

Patent

active

047578220

ABSTRACT:
The invention falls within the art field of electronic detection and measuring instruments for medical use. Connected to the audio output of a conventional Doppler device, the instrument disclosed processes the Doppler signal (P.sub.t) and produces an output signal (R.sub.t) in the form of a quantity per unit of time which is proportional to the radius of a circular cross-section equivalent in area to the effective cross-section of the blood vessel under examination. The instrument provides a video image of this `relative` cross-section as well as producing a numerical read-out proportional to the maximum and the minimum radius of the relative cross-section which register during heartbeat.

REFERENCES:
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patent: 4095597 (1978-06-01), Hassler
patent: 4292977 (1981-10-01), Krause et al.
patent: 4370985 (1983-02-01), Takeichi et al.
patent: 4552152 (1985-11-01), Tachita et al.
patent: 4630612 (1986-12-01), Uchida et al.
patent: 4660565 (1987-04-01), Shirasoka
patent: 4665925 (1987-05-01), Miller

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