Decompression bubble detectors

Details Decompression bubble detectors Decompression bubble detectors

1979-10-10

1981-09-22

Michell, Robert W.

Surgery

Truss

Pad

73 19, A61B 1000

Patent

active

042904323

ABSTRACT:
A decompression bubble detector comprises a pulsed ultra-sound transmitter/receiver which is scanned across a cross-section of tissue and the total number of pulse echoes received in a preselected time interval is recorded. Changes in the total number of pulse echoes recorded in successive time intervals are used to monitor the decompression. A single transducer is scanned by means of a driven eccentric cam and a cam follower. A sin/cos potentiometer generates a signal related to the angular position of the transducer connected to a delay so that pulse counting can be arranged to coincide with the passage of the transducer across the target.

REFERENCES:
patent: 3710615 (1973-01-01), Johnson et al.
patent: 3921622 (1975-11-01), Cole
patent: 3974683 (1976-08-01), Martin
patent: 3974826 (1976-08-01), Eggleton et al.
patent: 4068521 (1978-01-01), Cosentino et al.
patent: 4112775 (1978-09-01), Abts
patent: 4130010 (1978-12-01), Woun
Furness, A. et al., "Detection of Bubbles in Blood Vessels and Extra-Corporeal Circuits", Med & Biol. Eng & Comput, Jul. 1979, pp. 534-535.

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