Optical probe

Details Optical probe Optical probe

1989-03-30

1991-04-09

Howell, Kyle L.

Surgery

Truss

Pad

128665, A61B 600

Patent

active

050055763

ABSTRACT:
Optical probes for the invasive measurement of blood parameters consist of at last one sensor, each of these sensors having a diffusion zone with a selective membrane. The sensor or the sensors are surrounded by a stabilizing sheath. This sheath is to be fastened on sensor(s) by a glue. A silicone glue provides the feature that gas molecules can diffuse through it; therefore, blood gas sensors such as pO.sub.2 sensors or pCO.sub.2 sensors may be completely embedded in said glue. If a pH sensor is used, it must be placed in the top position of the horizontally lying sheath during manufacturing. The silicone glue then does not cover the diffusion zone of the pH sensor completely. Further, silicone glue provides additional elasticity which improves sensor characteristics.

REFERENCES:
patent: 3674013 (1972-07-01), Polanni
patent: 4557900 (1985-12-01), Heitzman
patent: 4568444 (1986-02-01), Nakamura et al.
IEEE Transactions on Biomedical Engineering, vol. BME-33, No. 2, Feb. 1986.

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