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Gas throttle type cryosurgical device and method for controlling same

A gas throttling and surgical technology, which is used in cooling surgical instruments, medical science, cooling appliances for treatment and treatment, etc., can solve the problems of dependence on imports, high cost, limited heating capacity of helium gas, etc., to reduce requirements and use costs. Effect

Active Publication Date: 2016-08-17
电冷医疗科技(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that the helium used for rewarming is an expensive rare gas, which depends on imports. The price is about 8 to 10 times that of the same amount of argon of the same level, and the cost is very high. At the same time, the heating capacity of helium is limited, and the highest can only reach about 320K.

Method used

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  • Gas throttle type cryosurgical device and method for controlling same
  • Gas throttle type cryosurgical device and method for controlling same
  • Gas throttle type cryosurgical device and method for controlling same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: as figure 1 As shown, a gas throttling cryosurgical device of the present invention includes a high-pressure freezing gas circuit, a low-pressure gas supply gas circuit, a low-pressure heating gas circuit, a split gas circuit, a refrigerator gas delivery pipe 8 and a refrigerator 9 .

[0067] The high-pressure refrigerated gas circuit includes a high-pressure gas input pipe 2 and a refrigerated gas main pipe 6 connected in sequence to the outlet of the high-pressure gas source 1a. The high-pressure gas input pipe 2 is provided with a high-pressure air pressure gauge 1b and a high-pressure pressure regulating valve 1c. The connection between the high-pressure gas input pipe 2 and the refrigerated gas main pipe 6 is provided with a high-pressure pressure limiting valve 5; The pipe section between is provided with the first tee 3.

[0068]The low-pressure gas supply circuit includes: a residual gas output port 10d connected to the high-pressure residual gas ...

Embodiment 2

[0085] Embodiment 2: as figure 2 As shown, on the basis of the above-mentioned embodiment 1, a gas heater 23 is arranged on the pipeline between the low pressure limiting valve 21 and the refrigerator heating solenoid valve 25 on the heating gas main pipe 24, so that the low pressure The rewarming gas is preheated before entering the freezer, thereby enhancing the effect of rewarming and heating.

[0086] The control method implemented in Example 2 includes freezing mode and rewarming mode, and the rewarming modes can be divided into (1) split flow rewarming mode, (2) residual gas rewarming mode, (3) general pressure according to the source of rewarming gas The control process of the rewarming mode, (4) throttling rewarming mode and (5) exhaust reheating mode is basically the same as the corresponding method in embodiment 1, except that the gas heater 23 introduced can directly preheat the low pressure The gas is input into the refrigerator, which breaks through the heating ...

Embodiment 3

[0087] Embodiment 3: as image 3 As shown, the gas throttling type cryosurgical device is similar to the basic structure of the above-mentioned embodiment 1, the difference is that the helium passage in this embodiment is separated from other low-pressure gas passages, and an independently controlled helium solenoid valve and a helium limiter are set. Pressure valve, that is, helium is connected to an independent helium inlet pipe 15 from the helium source 12a, and its other end is connected to the heating gas main pipe 24 at the third tee 22, and the helium inlet pipe 15 is provided with the helium pressure gauge 12b, the helium pressure regulating valve (12c), the helium solenoid valve 16 and the helium pressure limiting valve 17 in sequence.

[0088] In Embodiment 3, the independent helium pressure limiting valve 17 is set to limit the pressure to the working pressure (6.9 MPa) of helium throttling heating. The rest of the low-pressure rewarming gas can be limited to any p...

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PUM

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Abstract

The invention discloses a gas throttle type cryosurgical device and a method for controlling the same. A plurality of rewarming processes can be implemented by the aid of the gas throttle type cryosurgical device and the method. Rewarming (shunt rewarming) effects can be realized by the aid of gas which is shunted from high-pressure freezing gas and has limited pressures lower than throttle working pressures; rewarming (residual gas rewarming) effects can be realized by the aid of residual gas with the pressures lower than freezing working pressures; rewarming (normal-pressure rewarming) effects can be realized by the aid of normal-pressure gas; rewarming (throttle rewarming) effects can be realized by the aid of throttle pyrogenic gas; rewarming (exhaust rewarming) effects can be realized by the aid of gas source shutting and equipment exhaust procedures. The gas throttle type cryosurgical device and the method have the advantages that the gas throttle type cryosurgical device is also provided with gas preheating devices, accordingly, the rewarming efficiency can be improved, the rewarming temperatures can be increased, and the gas throttle type cryosurgical device has a freezing function, a rewarming function and a heating function; the technical prejudice that throttle frigorific gas only can be used for freezing can be corrected, rewarming difficult problems of existing gas throttle type cryosurgical equipment can be solved, the gas utilization rate can be increased, the surgical cost can be reduced, energy can be saved, environments can be protected, the rewarming performance can be enhanced, the gas throttle type cryosurgical device has an additional thermotherapy function, and the gas throttle type cryosurgical device and the method are beneficial to promoting popularization and improvement of cryoablation technologies.

Description

technical field [0001] The invention relates to a medical instrument for cryosurgical treatment, in particular a gas throttling type cryosurgical system and a control method thereof. Background technique [0002] Cryosurgery is a method of using ultra-low temperature to damage and ablate diseased tissue, and it is also the earliest diseased tissue ablation technique used in human history. Since American neurosurgeon Irving Cooper and engineer Arnold Lee invented the probe-shaped liquid nitrogen freezer and used it to freeze brain tissue in 1960, liquid nitrogen was used as a low-temperature working medium (refrigerant), and heated nitrogen was used as a high-temperature working medium (heating medium). The liquid nitrogen cryosurgical equipment is used to treat various tumors. However, the complex and cumbersome liquid nitrogen freezing equipment, difficult operation and poor curative effect have caused the long-term stagnation and decline of cryosurgery. [0003] Since th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/02A61F7/00
CPCA61B18/02A61B2018/00017A61B2018/00583A61B2018/0237A61B2018/0262A61F7/0053A61F2007/0055
Inventor 赵国江李萍姜骁洋
Owner 电冷医疗科技(天津)有限公司
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