Non-invasive electromagnetic technique for monitoring physiologi

Details Non-invasive electromagnetic technique for monitoring physiologi Non-invasive electromagnetic technique for monitoring physiologi

1985-10-28

1987-09-01

Howell, Kyle L.

Surgery

Truss

Pad

128734, A61B 505

Patent

active

046901493

ABSTRACT:
An apparatus and method for non-invasively sensing physiological changes in the brain is disclosed. The apparatus and method uses an electromagnetic field to measure localized impedance changes in brain matter and fluid. Various spatial and temporal techniques are used to localize impedance changes in the brain. The apparatus and method has particular application in locating and providing time-trend measurements of the process of brain edema or the process of hydrocephalus.

REFERENCES:
patent: 3789834 (1974-02-01), Duroux
patent: 4066065 (1978-01-01), Kraus
patent: 4270545 (1981-06-01), Rodler
patent: 4281667 (1981-08-01), Cusman
patent: 4561426 (1985-12-01), Stewart
Robillard et al., "Specific Impedance Measurements of Brain Tissues", Med. & Biol. Eng. & Comput., Jul. 1977, vol. 15, pp. 438-445.

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