Infiltration detection apparatus

Details Infiltration detection apparatus Infiltration detection apparatus

1985-02-20

1987-03-03

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 66, 128736, 343718, A61B 500

Patent

active

046472819

ABSTRACT:
An apparatus used in association with a needle for infusing a liquid. This apparatus is for detecting the infiltration of the liquid through the vascular wall into the perivascular tissues. The apparatus includes a non-invasive conformal microwave antenna means adapted to be positioned over the area where liquid infusion occurs. A microwave radiometer connects from the antenna means for detecting sub-cutaneous temperature at the site thereof. A reference antenna means is also employed so that a proper temperature differential can be established. In an alternate version of the invention, switching means is provided so that upon detecting an alarm condition, the liquid can be immediately terminated and a neutralizing agent can be introduced to the needle.

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Barrett & Myers, "Subcutaneous Temperature: A Method of Noninvasive Sensing", Science, Nov. 14, 1975, vol. 190, pp. 669-671.
Dicke, "The Measurement of Thermal Radiation at Microwave Frequencies", The Review of Scientific Instruments, Jul. 1946, vol. 17, No. 7, pp. 268-275.
"Passive Subcutaneous Temperature Measurement for Investigation of Thermoregulation", Proceedings of the 8th European Microwave Conference, Paris, France (Sep. 4, 1978).
"Telethermometer", Polish Technical Review (Poland) vol. 135, No. 1 (1981).
A Microwave Compatible MIC Temperature Electrode for Use in Biological Dielectrics", Larsen et al, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-27, No. 7, Jul. 1979.
Carr, "Compact Dual-Mode Microwave Antenna,"NASA Tech. Briefs, Spring 1981.

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