Ultrasonic air-in-line detector

Details Ultrasonic air-in-line detector Ultrasonic air-in-line detector

1987-08-17

1988-08-16

Coven, Edward M.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604122, A61M 514

Patent

active

047641665

ABSTRACT:
An ultrasonic device for detecting the presence of air in the fluid line of an IV infusion device comprises a transmitter and a receiver which are positioned to pinchingly engage a portion of the fluid line therebetween. Both the transmitter and receiver have convex-shaped lenses which contact and cause a slight indentation of the tube for enhanced coupling therebetween. The device may also have a pair of diametrically opposed pedestals which contact and engage the tube from a direction substantially at right angles to the axis defined by the transmitter and receiver. These pedestals help hold the tube between the transmitter and receiver. The device also includes self-testing electronic componentry which compares the transmitter-off output with the transmitter-on output to determine whether operation is normal or should be stopped because either there is air in the line or the electronic circuitry is faulty.

REFERENCES:
patent: 3974681 (1976-08-01), Namery
patent: 4137940 (1979-02-01), Faisandier
patent: 4237878 (1980-12-01), Kobayashi et al.
patent: 4367736 (1983-01-01), Gupton
patent: 4418565 (1983-12-01), St. John
patent: 4487601 (1984-12-01), Lindemann
patent: 4496346 (1985-01-01), Mosteller
patent: 4617014 (1986-10-01), Cannon et al.
patent: 4673927 (1987-06-01), Cianciavicchia et al.

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