Optical indicator device for the remote measurement of physical

Details Optical indicator device for the remote measurement of physical Optical indicator device for the remote measurement of physical

1980-04-14

1986-08-19

Howell, Kyle L.

Surgery

Truss

Pad

128665, 128736, 2504581, 374162, 435 14, A61B 500

Patent

active

046063510

ABSTRACT:
An optical indicator device for the remote indication and measurement of physical changes in a living body includes at least one source of light disposed remote from the test subject and at least one indicator disposed in direct contact with the test subject. This indicator includes a fluid-tight, light-permeable membrane which encloses an inner space. A liquid crystal compound is disposed in the inner space. This compound is of the opto-electrical type adapted to respond to light waves from said source of light and furthermore responsive to physical changes in the space surrounding said indicator. Detector means are provided for indicating and measuring the response of said liquid crystal compound to said light rays and physical changes. Preferably, the indicator device is combined with a similar device containing a different liquid crystal for measuring the glucose concentration. Thus, the device permits to measure the temperature in the test area of the test subject and simultaneously to measure the glucose concentrations prevailing therein.

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