Measuring system including elements implantable beneath the skin

Details Measuring system including elements implantable beneath the skin Measuring system including elements implantable beneath the skin

1978-01-09

1980-04-22

Kamm, William E.

Surgery

Truss

Pad

A61B 502

Patent

active

041989872

ABSTRACT:
A system is disclosed having a portion permanently implantable beneath the skin to perform in vivo measurements, such as Doppler ultrasonic blood flow velocity measurements. Measurement information is transmitted out through the skin by means of ultrasonic vibrations radiated by one piezoelectric crystal and received by another. Power is transferred into the implanted portion of the system at an audio frequency by inducing current in an implanted coil.

REFERENCES:
patent: 3430625 (1969-03-01), McLeod, Jr.
patent: 3672352 (1972-06-01), Summers
patent: 4041954 (1977-08-01), Ohara

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