METHOD FOR INFRARED EVALUATION OF HUMAN RESISTANCE TO BLOOD LOSS Russian patent published in 2017 - IPC A61B5/01 A61B5/02 

FIELD: medicine.

SUBSTANCE: longest finger of the hand is preliminarily determined. After 30 minutes, when the examined subject is located in the room at a temperature of 25°C with bare hands, the shoulder of the other arm is circularly compressed with a tonometer cuff under pressure, which ensures veins compression. At that, the examined person is suggested to begin to delay breathing for the maximum possible period of time, causing the maximum possible apnea. Using a thermal imager in the range of +24 - (+25)°C dynamics of the local temperature in the center of the bare cushion of the previously selected longest finger is recorded before, during and 3 minutes after compression of the other arm shoulder, and the moment of holding the breath, also recording the duration of apnea. Then, compression of the other arm shoulder with the tonometer cuff is stopped, the difference in the local temperature in the center of the finger cushion under examination and the duration of the apnea is determined, and the resolution is provided. If local temperature reduction of more than 1.0°C and apnea duration of more than 50 seconds are recorded, a conclusion is made about high human resistance to blood loss. If local temperature reduction less than 0.5°C and apnea duration of less than 39 seconds, a conclusion is made about low resistance to blood loss.

EFFECT: method ensures safety and accuracy of assessment of human resistance to blood loss, as well as the possibility of selection of the individuals adapted to blood loss, preserving consciousness and performance after blood loss.

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