Pressure measuring system with ultrasonic wave

Details Pressure measuring system with ultrasonic wave Pressure measuring system with ultrasonic wave

1982-08-04

1984-11-20

Kreitman, Stephen A.

Surgery

Truss

Pad

73 19, G01N 2902

Patent

active

044833458

ABSTRACT:
A system for measuring from the outside of a living body the pressure within the heart or the pressure of any portion which does not allow a measurement by the direct insertion of a pressure measuring sensor.
This system provides a method of measuring the pressure of the object by generating fine bubbles through cavitation, applying a low frequency ultrasonic wave to the medium, and then detecting the bubbles which are generated with a system for detecting the high or low frequency harmonics due to the bubbles or a higher frequency ultrasonic wave applied to the medium.

REFERENCES:
patent: 3622958 (1971-11-01), Tucker
patent: 3640271 (1972-02-01), Horton
patent: 3974681 (1976-08-01), Namery
patent: 4112735 (1978-09-01), McKnight
patent: 4122713 (1978-10-01), Stasz et al.
patent: 4130010 (1978-12-01), Wonn
Rasor Associates Inc., Noninvasive Assessment of Pulmonary Hypertension Using the Bubble Ultrasonic Resonance Pressure Method, Apr. 1977.
Devine, III et al., Noninvasive Pressure Measurement, IBM Corp., 1978.
Jacobson, Ultrasonic Detection of Blood Stream Emboli, Sep. 1973.
Nashi, Ultrasonic Detection of Bubbles With Doppler Flow Transducers, Jul. 1972.

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