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A cryosurgical device for freezing and rewarming by adjusting air pressure

A pneumatic and surgical technology, applied in the fields of cooling surgical instruments, medical science, and parts of surgical instruments, etc., can solve the problem of low temperature working medium waste of cryosurgery equipment, improve gas utilization rate, break through the temperature rise limit, increase The effect of tumor hyperthermia

Active Publication Date: 2018-07-06
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

[0011] Aiming at the above-mentioned prior art, the present invention provides a cryosurgical device that realizes freezing and rewarming by adjusting the air pressure, and realizes the functions of high-pressure gas freezing, high-pressure residual gas and low-pressure gas rewarming and heating by adjusting and controlling the throttling refrigeration type gas pressure, which can solve the problem of Huge waste of low temperature working fluid and rewarming problems in gas throttling cryosurgical equipment

Method used

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  • A cryosurgical device for freezing and rewarming by adjusting air pressure
  • A cryosurgical device for freezing and rewarming by adjusting air pressure
  • A cryosurgical device for freezing and rewarming by adjusting air pressure

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Effect test

Embodiment 1

[0042] Example 1, such as figure 1 As shown, the present invention proposes a cryosurgical device that adjusts the air pressure to achieve freezing and rewarming, including a high-pressure freezing air circuit, a low-pressure heating air circuit, a split air circuit and component A.

[0043] The high-pressure refrigerated gas circuit includes a high-pressure gas input pipe 4 and a refrigerated gas main pipe 6 that are sequentially connected to the outlet of the high-pressure gas source 1. The high-pressure gas input pipe 4 is provided with a first air pressure gauge 2 and a first pressure regulating valve 3 A high-pressure pressure limiting valve 5 is provided at the junction of the high-pressure gas input pipe 4 and the refrigerated gas main pipe 6 . The low-pressure heating gas circuit includes a low-pressure gas input pipe 17, a confluence gas pipe 12, and a heating gas main pipe 20 connected to the outlet of the low-pressure gas source 14 in sequence. A second air pressur...

Embodiment 2

[0052] Embodiment 2, although, in embodiment 1, gas heater 19 is not provided, but throttling freezing and rewarming can also be realized, but the rewarming temperature will not be very high, basically at 0°C or slightly higher Some, such as 10-20°C; in order to achieve a better rewarming effect, and even realize the function of tumor hyperthermia (reaching above 40°C), therefore, on the basis of the structure of the above-mentioned embodiment 1, such as figure 2 As shown, a gas heater 19 is provided on the low-pressure heating gas path between the low-pressure pressure limiting valve 13 and the refrigerator heating solenoid valve 21 . Adopting the technical scheme provided with the gas heater 19 in embodiment 2, not only rewarming can be achieved, but also heating and rewarming to 40-60° C. can be realized. The difference between the heating and rewarming process in embodiment 2 and the rewarming process in embodiment 1 is that the pressure is limited to the working pressure...

Embodiment 3

[0053] Example 3, such as image 3 As shown, on the basis of the structure of the above-mentioned embodiment 1, multiple components A are connected in parallel between the end of the refrigerated gas main pipe 6 and the end of the heating gas main pipe 20, so that multiple refrigerators can work at the same time, and can Independently control the working mode of each freezer to realize the function of freezing and rewarming.

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Abstract

The present invention discloses a cryosurgery device capable of achieving freezing and rewarming by adjusting gas pressure. The cryosurgery device comprises a high-pressure gas source, a high-pressure pressure-limiting valve, a freezing gas main pipe and a freezer for throttling and freezing; high-pressure gas divided from a high-pressure gas pipe passes through a shunting electromagnetic valve and a low-pressure pressure-limiting valve for pressure limiting, and is transmitted to the freezer via a heating gas main pipe for shunting and rewarming; gas from a low-pressure gas source passes through a low-pressure electromagnetic valve and the low-pressure pressure-limiting valve for pressure limiting, and is transmitted to the freezer via the heating gas main pipe for low-pressure rewarming; and the heating gas main pipe is provided with a gas heater capable of preheating low-pressure rewarming gas and achieving a controllable heating function. The technical prejudice that throttling refrigeration type gas can only be used for freezing is corrected, warming is performed by utilization of residual gas of high-pressure freezing gas and low-pressure gas, the rewarming problem and low-temperature working medium waste problem of a gas throttling type cryosurgery device are solved, and freezing, rewarming and heating functions are achieved.

Description

technical field [0001] The invention relates to a medical device for cryosurgical treatment, which is characterized in that it is a gas throttling refrigeration type cryosurgical device that realizes the functions of freezing, rewarming and heating by adjusting the gas pressure. 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 nitrogen was recovered and heated as a high-temperature working medium (heat) Media) liquid nitrogen cryosurgical equipment is used to treat various tumors. However, the complex and cumbersome liquid nitrogen freezing equipment, difficult operation and poor c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/00017A61B2018/00041A61B2018/0262
Inventor 赵国江李萍王德民
Owner 电冷医疗科技(天津)有限公司
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