Ultrasonic doppler blood flow measuring apparatus

Details Ultrasonic doppler blood flow measuring apparatus Ultrasonic doppler blood flow measuring apparatus

Filed on

1993-01-26

Date issued

1994-01-18

Examiner

Kamm, William E.

Patent Class

Surgery

SubClass

Truss

SubSubClass

Pad

Other Related Categories

A61B 800

Type

Patent

Status

active

Patent number

052793028

Description

ABSTRACT:
An ultrasonic Doppler blood flow measuring apparatus comprises a plurality of frame memories for storing information pieces about a blood flow speed in a unit of frame, circuits for comparing blood flow speed information pieces at corresponding addresses on the plurality of frame, memories and determining a speed difference, a circuit for comparing the speed difference with a predetermined threshold value and determining a blood flow at the corresponding address as an arterial flow when the speed difference exceeds the threshold value but as a venous flow when the speed difference is below the threshold value, and a circuit for displaying the determined arterial and venous flows in different colors.

REFERENCES:
patent: 5105817 (1992-04-01), Uchibori et al.
patent: 5156152 (1992-10-01), Yamazaki et al.
patent: 5190044 (1993-03-01), Kawasaki et al.

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