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

A fiber grating and detection system technology, which is applied in the directions of thermometers, blood pumps, and thermometers with physical/chemical changes, can solve the problems of large interference influence, high price, slow response speed, etc., and achieves good spectral characteristics, simple structure, Reliable effect

Inactive Publication Date: 2015-09-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1. Implantable axial flow blood pump temperature detection system based on fiber grating

[0034] The fiber grating-based implantable axial flow blood pump temperature detection system provided in this embodiment, such as figure 1 and figure 2 As shown, it includes: a blood pump, a fiber grating 8 pasted on the axial channel 7 of the blood pump, a motor controller 10 connected to the outlet of the fiber grating 8, a demodulator 14, and a data cable connected to the demodulator 14 Connected computer 13 .

[0035] The blood pump is an axial-flow artificial heart pump. The domestic research is mainly in the past 20 years, and it has a large gap with foreign countries. It is an existing technology. The casing of the flow channel 7, the front guide wheel 2, the impeller 3, and the rear guide wheel 5 arranged in the axial flow channel 7 from left to right, and the permanent magnet brushless motor 4 installed in the inner cavity.

[0036] There are multiple fibe...

Embodiment 2

[0041] Embodiment 2. Implantable axial flow blood pump temperature detection method based on fiber grating

[0042]The method is realized by using the fiber grating-based implantable axial-flow artificial heart pump temperature detection system provided in Embodiment 1, and the steps include:

[0043] Step 1: Slot the brushless motor stator to facilitate the laying of fiber gratings

[0044] The stator coil of the brushless motor is wound on the cylindrical stator, and the wiring of a fiber grating needs to pass through the stator, and the stator needs to be slotted to lead out the optical fiber. Drill a hole 1 mm away from the outer surface of the flow path of the heart pump where the stator is close to, and the diameter of the hole is 1 mm.

[0045] Step 2: Laying of Fiber Bragg Gratings for Implantable Axial Artificial Heart Pump

[0046] The laying feature of the implantable axial-flow artificial heart pump fiber grating lies in the distribution measurement of one line a...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/12G01K11/32G01K11/3206
CPCG01K11/3206A61M60/205A61M60/122
Inventor 吴华春邓春三卢晓露马一超
Owner WUHAN UNIV OF TECH
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