Gas throttle type cryosurgical device and method for controlling same

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...

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.

Images