Implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings

Abstract

The invention provides an implantable axial-flow type blood pump temperature detection system and method based on fiber bragg gratings. The system comprises a blood pump, the fiber bragg gratings (8), a motor controller (10), a demodulator (14) and a computer (13), wherein the fiber bragg grating (8) is pasted to an axial blood pump flow passage (7); the motor controller (10) and the demodulator (14) are connected with the leading-out ends of the fiber bragg gratings (8); the computer (13) is connected with the demodulator (14) through a data line. The method comprises the steps that the fiber bragg gratings are laid on a brushless motor stator; the fiber bragg gratings are laid in the implantable axial-flow type artificial heart pump; optical fibers are led out of the human body and connected with the demodulator. The implantable axial-flow type blood pump temperature detection system detects the temperature of the implantable axial-flow type blood pump through the fiber bragg gratings, and the compatibility problem caused by introduction of a sensor cannot occur while temperature detection is achieved, so that intelligent detection and control are realized, power consumption of the blood pump is reduced, and the problems existing in implantation of the blood pump are reduced.

Description

technical field [0001] The invention relates to temperature detection technology, in particular to an implantable axial flow blood pump temperature detection system and method based on fiber grating. Background technique [0002] In recent years, with the shortage of heart transplant donors and the rapid development of cardiac surgery, the assistance time of patients with heart failure has been gradually extended, and the patients have higher and higher requirements for quality of life. Therefore, various impeller pumps, especially implantable The axial flow blood pump is becoming more and more popular, but the blood pump will also have corresponding influences and changes on the blood pump and blood temperature during the working process. [0003] In the working state of the blood pump, the biggest cause of temperature is the continuous work of the blood pump motor. [0004] 1. The heat emitted by the iron loss and copper loss caused by the permanent magnet brushless motor...

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Problems solved by technology

[0004] 1. The heat emitted by the iron loss and copper loss caused by the permanent magnet brushless motor coil of the blood pump will be transferred to the blood in the flow channel of the blood pump through the intermediate medium on the inner wall of the blood pump, resulting in changes in the blood temperature;

[0005] 2. When the impeller is running at high speed, the friction of the sliding bearing on the wheel shaft will also cause the temperature of the blood flowing through the blood pump to change;

However, the characteristics of different types of existing temperature sensors are inconsistent. Thermocouple sensors have medium precision and slow response speed. Although RTD sensors have high precision but are expensive, digital and analog output IC temperature sensors have slow response speed and are greatly affected by interference. At the same time, these sensors need to be powered on

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