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Temperature control method and device for radio frequency ablation device

A temperature control method and radio frequency ablation technology, applied in the parts of surgical instruments, medical science, heating surgical instruments, etc., can solve the problem of low heating efficiency, high temperature control requirements of radio frequency ablation devices, and difficulty in modelling changes in human tissue temperature. Establishment and other issues to achieve the effect of ensuring the effect of treatment and ensuring the safety of treatment

Active Publication Date: 2019-07-30
BEIJING BOHAIKANGYUAN MEDICAL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radiofrequency ablation devices have high requirements for temperature control, and it is difficult to establish a model of temperature changes in human tissue
Therefore, the use of PID algorithm for temperature control also has the problems of low heating efficiency and poor temperature stability, which in turn affects the therapeutic effect and safety of radiofrequency ablation technology

Method used

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  • Temperature control method and device for radio frequency ablation device
  • Temperature control method and device for radio frequency ablation device
  • Temperature control method and device for radio frequency ablation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] figure 1 It is a schematic flow chart of Embodiment 1 of the present application, such as figure 1 As shown, this embodiment mainly includes:

[0067] S101: Obtain the temperature of the radiofrequency ablation unit, calculate a first temperature difference between the temperature of the radiofrequency ablation unit and a preset temperature, and determine whether the first temperature difference is greater than a preset first temperature threshold.

[0068] In order to accurately obtain the temperature of the radiofrequency ablation unit, reduce measurement errors, and avoid equipment failure, the following steps are used to obtain the temperature of the radiofrequency ablation unit:

[0069] Use two thermocouples to obtain the measured temperature of the radiofrequency ablation unit respectively;

[0070] calculating a second temperature difference between the measured temperatures obtained by the two thermocouples;

[0071] If the second temperature difference is s...

Embodiment 2

[0164] Such as Figure 6 As shown, the embodiment of the present application also provides a temperature control device 600 of a radiofrequency ablation device, including:

[0165] The temperature detection module 601 is configured to obtain the temperature of the radiofrequency ablation unit.

[0166] The mode selection module 602 is configured to calculate a first temperature difference between the temperature of the radiofrequency ablation unit and a preset temperature, and determine whether the absolute value of the first temperature difference is greater than a preset first temperature threshold.

[0167] The time optimal control module 603 is configured to set the power of the radiofrequency ablation unit to a preset power when the absolute value of the first temperature difference is greater than the first temperature threshold.

[0168] The time optimal control module 603 outputs a constant power value K when the absolute value of the first temperature difference is g...

Embodiment 3

[0171] Figure 7 It shows that the temperature control device 700 of another radiofrequency ablation device provided by the embodiment of the present application includes:

[0172] Temperature difference calculation module 701 , time optimal control module 702 , fuzzy sliding mode control module 703 , mode selection module 704 , pulse width modulation module 705 , level control module 706 and temperature detection module 707 . Wherein, the fuzzy sliding mode control module 703 includes: a temperature difference change rate calculation module 7031 , a sliding mode function calculation module 7032 , a sliding mode function change rate calculation module 7033 and a fuzzy control module 7034 .

[0173] The temperature detection module 707 acquires the temperature of the radiofrequency ablation unit, and uses the temperature difference calculation module 701 to calculate a first temperature difference between the temperature of the radiofrequency ablation unit and a preset temperat...

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Abstract

The invention discloses a temperature control method and device for a radio frequency ablation device, and relates to medical device technologies. The method includes the steps of acquiring a temperature of a radio frequency ablation unit, calculating a first temperature difference between the temperature of the radio frequency ablation unit and a preset temperature, and determining whether an absolute value of the first temperature difference is greater than a preset first temperature threshold; when the absolute value of the first temperature difference is greater than the first temperaturethreshold, setting the power of the radio frequency ablation unit to a preset power; otherwise, controlling the power of the radio frequency ablation unit according to the first temperature differenceand the temperature difference change rate; the temperature difference change rate is a difference between the first temperature differences of two consecutive sampling instants. The method can quickly and stably make the temperature of the radio frequency ablation device reach the set temperature range, after the set temperature range is reached, and the temperature of the radio frequency ablation device is kept stable, thereby ensuring the therapeutic effect and treatment safety of the radio frequency ablation technique.

Description

technical field [0001] The present application relates to medical equipment technology, in particular to a method and device for controlling the temperature of a radio frequency ablation device. Background technique [0002] At present, radiofrequency ablation technology is a common technology in the medical field, and radiofrequency ablation has been applied in the treatment of tumors and thrombus. In the design of radiofrequency ablation devices, temperature control is the core issue in the design of radiofrequency ablation devices. During the treatment process, the temperature of the radiofrequency ablation device should reach the temperature range of the localized stable heating of the treated tissue, while the damage to adjacent tissue cells should be as low as possible, so as to ensure the therapeutic effect and safety of the treatment. [0003] In the prior art, the proportional-differential-integral (proportional integral and differential, PID) algorithm is mostly u...

Claims

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Application Information

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IPC IPC(8): A61B18/12
CPCA61B18/12A61B18/1233A61B2018/00577A61B2018/00714A61B2018/00791A61B2018/00642A61B2018/00702
Inventor 潘福义郭明辉张强
Owner BEIJING BOHAIKANGYUAN MEDICAL DEVICES
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