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Multifunctional gap pipeline controlled cryoablation system

A gas pipeline and multi-functional technology, applied in pipeline systems, gas/liquid distribution and storage, conduits, etc., can solve problems such as complex operation and single function, and achieve the effect of improving safety, improving efficiency, and avoiding manual adjustment

Active Publication Date: 2018-04-24
ACCUTARGET MEDIPHARMA (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of the existing cryoablation system, especially the single-pole system, which has complex operation and single function, the present invention proposes a combination of low-temperature level freezing, medium-low temperature level freezing, gas-saving / power-adjusted freezing, and rewarming in the return process. Functional gas piping system

Method used

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  • Multifunctional gap pipeline controlled cryoablation system
  • Multifunctional gap pipeline controlled cryoablation system
  • Multifunctional gap pipeline controlled cryoablation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An example of the use of the cryogenic stage freezing function is as follows: the pressure reducing valve 10 is set to an outlet pressure of 1500 psi, when the freezing function is turned on, the first to third solenoid valves 2, 3, and 4 are opened, and the gas enters from the cryogenic stage freezing pipeline. The excess cooling capacity of the return air is recovered by the primary pre-cooling of the heat exchanger 19 through the return air, and then enters the low-temperature stage heat exchanger 20 (such as the evaporator of the self-cascade refrigeration system) for further pre-cooling to a lower temperature, low temperature The gas enters the cryoablation needle from the air inlet 21, reaches the needle through the throttling effect of the capillary to reach a temperature lower than that of the low-temperature heat exchanger 20, and the cold energy released at the needle is absorbed by the tumor or other diseased tissues, and there is still excess The cooling capa...

Embodiment 2

[0036] An example of the gas-saving / power-adjusted freezing function is as follows: Gas-saving mode: the second decompression valve 11 is set to an outlet pressure of 1200 psi, and the freezing is first turned on, and the process is as in Example 1. After the temperature reaches the lowest temperature (such as -150°C) and the primary precooling of the heat exchanger is sufficient for the return air (such as the thermometer 33 reaches -70°C), close the second solenoid valve 3 and open the fourth solenoid valve 5 and the flow rate at the same time. Controller 23 (full open), thus the working pressure of the system is reduced to 1200psi, and the gas flow rate of the system is reduced, but the temperature of the needle can still maintain the lowest temperature. Gas consumption of cylinder 1.

[0037] Power adjustment mode: if it is necessary to slow down the growth rate of the ice ball or stop the growth of the ice ball during the operation, the flow control value of the flow cont...

Embodiment 3

[0039] Examples of rewarming\freezing without precooling are as follows: figure 1 As shown, in the rewarming process, the third pressure reducing valve 12 is set to 300 psi. After freezing, close the first to fourth electromagnetic valves 2, 3, 4, 5 and flow controller 23, and when the rewarming function is turned on, open the first, fifth, and seventh electromagnetic valves 2, 6, 8, and the gas does not pass through any The pre-cooling directly enters the return air line of the cryoablation needle from the air return port 22, and enters the capillary after reaching the needle. This process has no throttling effect. With the heating module in the cryoablation needle, a good rewarming effect can be achieved. The gas returns from the air inlet 21, and then is discharged to the atmosphere through the seventh solenoid valve 8. During the rewarming process, the pressure gauges 30 and 29 respectively monitor the pressure of the inlet and outlet air in real time. When the inlet pres...

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Abstract

The invention relates to a multifunctional gap pipeline controlled cryoablation system, gas in a gas bottle flows through a low-temperature stage refrigeration pipeline, a first medium-temperature refrigeration pipeline, a second medium-temperature refrigeration pipeline, a gas-saving / power regulation refrigeration pipeline or a progress normal temperature pipeline after passing by a main pipeline, and then enters a cryoablation needle through a gas inlet, or the gas flows through a return normal temperature pipeline or the first medium-temperature refrigeration pipeline after passing by the main pipeline, and then enters the cryoablation needle through a gas return port; the gas returning from the cryoablation needle flows through an exhaust pipeline and is exhausted into the air after passing by the gas return port or flows through a progress exhaust pipeline through the air inlet to be exhausted into the air. With the adoption of the multifunctional gap pipeline control scheme, theprocess optimization of the cryoablation operation can be facilitated, and functions of different temperature gear treatment, ice ball control, gas saving, effectiveness and safety improvement and thelike can be realized on one same system.

Description

technical field [0001] The invention relates to a cryotherapy medical device, in particular to a cryoablation system with a multifunctional gas pipeline control scheme. Background technique [0002] The cryoablation surgery system generally transports cryogenic working fluid to the head of the cryoablation needle through the pipeline at the host end and the delivery tube of the cryoablation needle, releases cold energy to the diseased tissue, and then returns along the concentric cannula. Commonly used cryogenic surgical instruments mainly include liquid nitrogen cold knife based on phase change refrigeration and argon-helium knife based on throttling refrigeration. At present, in the cryoablation treatment of malignant tumors, the argon-helium knife produced by Endocare Company of the United States is the most widely used. The argon-helium knife has the advantages of thin cryoprobe, small surgical trauma, and convenient operation. However, it also has disadvantages such as...

Claims

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Application Information

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IPC IPC(8): A61B18/02F17D1/02F17D3/01F17D3/18
CPCA61B18/02A61B2018/00351A61B2018/0212A61B2018/0231A61B2018/0268A61B2018/0293F17D1/02F17D3/01F17D3/18
Inventor 杨迟徐彬凯
Owner ACCUTARGET MEDIPHARMA (SHANGHAI) CO LTD
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