Implantable, intracranial-pressure sensor

Details Implantable, intracranial-pressure sensor Implantable, intracranial-pressure sensor

1986-03-24

1988-04-19

Howell, Kyle L.

Surgery

Truss

Pad

128673, A61B 500

Patent

active

047382678

ABSTRACT:
The invention relates to a pressure sensor implanted into the skull to emit an electrical signal representing the intra-cranial pressure; this sensor is of the type which includes on one hand a test body (1) comprising a deforming diaphragm (3) and of an undeforming guard ring (2), and on the other hand a deformation detector (5) associated with the diaphragm; the test body (1) is made of an integral piece, in particular plastic, and has a continuous front side (1a) which preferably is planar; the mechanical and dimensional properties of the constituent plastic are matched in such a manner that under the maximum pressure of 30 kilopascals, the diaphragm deflection is within a predetermined range; within this range, the dura mater pressed by the sensor transmits faithfully the intracranial pressure with adequate sensitivity to employ a resistive type transducer which simultaneously is simple, rugged compact and economical.

REFERENCES:
patent: 2510073 (1950-06-01), Clark
patent: 3943915 (1976-03-01), Severson
patent: 4147161 (1979-04-01), Ikebe et al.
patent: 4191193 (1980-03-01), Seo
patent: 4312361 (1982-01-01), Nicholson et al.
patent: 4393878 (1983-07-01), Kahn

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