Method and apparatus for detection of air bubbles in tubing

Details Method and apparatus for detection of air bubbles in tubing Method and apparatus for detection of air bubbles in tubing

1992-01-23

1993-04-27

Noland, Tom

Measuring and testing

Hardness

Scleroscope or rebound

73 6453, G01N 29002

Patent

active

052051536

ABSTRACT:
A method and apparatus for assisting in the detection of bubbles in a fluid stream such as an intravascular line. Tubing having ribbing or other texturing spaced along the longitudinal axis to enhance signal transmission characteristics and to increase the number of signals intercepted by a passing bubble, is placed between an ultrasonic or other transmitter and detector. In other embodiments, bubbles are concentrated into a detection zone by a centrifugator or are concentrated and recirculated in a detection zone by an eddy-producing protrusion in the fluid stream.

REFERENCES:
patent: 4235095 (1980-11-01), Liebermann
patent: 4418565 (1983-12-01), St. John
patent: 4607520 (1986-08-01), Dam
patent: 4651555 (1987-03-01), Dam
patent: 4722224 (1988-02-01), Scheller et al.

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