Blood temperature control method for perfusion hyperthermic treatment and temperature-changing device

Abstract

The present invention relates to a blood temperature control method for perfusion hyperthermic therapeutic method and its temp. change equipment. Said control method includes the following steps: rising the water temperature in the water tank to a certain temperature value, then adopting double-ring PID control method in which the blood temp. of blood outlet of heat exchanger which is implemented in the computer is used as external ring control quaantity and the water temp. of water inlet of the heat exchanger is used as internal ring control quantity. The temp. change equipment designed according to said method contains high-power semiconductor heater whose power can be regulated, a reverse relay and a high-power DC power supply which are successively series-connected with input end of said heater.

Description

Technical field: [0001] A blood temperature control method and a temperature changing device for perfusion heating therapy relate to the technical field of medical hyperthermia. Background technique: [0002] Perfusion warming therapy is a treatment method for advanced cancer patients. It mainly uses the perfusion heating system to pump out human blood, raise it outside the body, and then flow back to the human body to form a blood circulation heating system. The perfusion heating system in the prior art is mainly composed of a heating water tank, a heat exchanger, a blood pump, a water pump, a blood temperature acquisition instrument and a computer. The computer controls the heating power of the water tank to raise the temperature of the water so that the heat exchange Heat exchange between the water and the blood in the device, and the blood of the whole body is continuously heated through the blood circulation, so that the entire temperature of the human body is raised a...

AI Technical Summary

Problems solved by technology

The heating water tank in the perfusion heating system currently used at home and abroad is mainly heated by an electric heating tube. The power of the electric heating tube cannot be adjusted and can only be controlled by a switch. Therefore, the water temperature is prone to large oscillations during the stabilization process.

If there is a slight fluctuation in the water temperature after it stabilizes, it cannot be stabilized quickly, which is not good for the treatment. To solve this problem at present, the only way to solve this problem is to increase the volume of the water tank to increase the heat capacity of the water, so that the small fluctuation is not easy to cause the water temperature to fluctuate. Variety

But this makes the whole system bulky and inconvenient to use

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