Biological fluid specific gravity monitor with ultrasonic sensor

Details Biological fluid specific gravity monitor with ultrasonic sensor Biological fluid specific gravity monitor with ultrasonic sensor

1984-12-20

1987-05-12

Coven, Edward M.

Surgery

Truss

Pad

128771, A61B 600

Patent

active

046641246

ABSTRACT:
An automatic urinary output monitor including a means for noninvasively determining the specific gravity of urine in a urine collection system including an oscillator with a feedback loop including ultrasonic transducers at opposite sides of a sampling chamber for producing an output signal with a frequency determined by the period of time it takes for a transmitted ultrasonic pulse to travel through the urine sample and to be received and means responsive to the frequency of the output signal for providing an indication of specific gravity of the urine sample.

REFERENCES:
patent: 3603303 (1971-07-01), Stouffer
patent: 3967490 (1976-07-01), Brady
patent: 4020330 (1977-04-01), Bae
patent: 4235099 (1980-11-01), Ishizaka
patent: 4277367 (1981-07-01), Madsen et al.
patent: 4343316 (1982-08-01), Jespersen
patent: 4386612 (1983-06-01), Roder et al.
patent: 4432231 (1984-02-01), Napp et al.
patent: 4448207 (1984-05-01), Parrish
patent: 4522068 (1985-06-01), Smith
Ultrasonics in Clinical Diagnosis by P. N. T. Wells Publisher: Churchill Livingstone, 1977.

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