Medical diagnostic device for determining bleeding times and beh

Details Medical diagnostic device for determining bleeding times and beh Medical diagnostic device for determining bleeding times and beh

1979-02-12

1980-07-01

Howell, Kyle L.

Surgery

Truss

Pad

A61B 500

Patent

active

042101530

ABSTRACT:
Disclosed herein is a medical diagnostic device for determining bleeding times and behavior of bleedings from a standardized wound, (hemmorrhagometry), wherein a flow of a rinsing liquid past the wound is established, thereby to cause the rinsing liquid to contact the wound. A photometric instrument or equivalent is provided for determining a characteristic of the rinsing liquid which is representative of the proportion of blood contained in the rinsing liquid having contacted the wound. The device of the invention is designed such that it permits controlling the temperature of the rinsing liquid and consequently of the bleeding location and of its surrounding area, in order to keep them on a preselected temperature. Temperature control is suitably achieved by means of a thermo-electric device which includes a first heat exchanger for receiving the flow of the rinsing liquid therethrough, a second heat exchanger for receiving the flow of a second liquid therethrough, a Peltier element in thermal contact with the first and second heat exchangers, and circuitry operable as a closed-loop servo-system for controlling energization of the Peltier element as a function of the temperature of the rinsing liquid, thereby to maintain the rinsing liquid temperature at a substantially constant level.

REFERENCES:
Sutor, A. H., et al., Amer. Journ. of Clinical Pathology, vol. 55, (1971), pp. 541-550.

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