CN200957107Y

CN200957107Y - Thermal conductive CO2 freezing knife

Info

Publication number: CN200957107Y
Application number: CN 200620110575
Authority: CN
Inventors: 严嘉; 童明伟; 徐广才; 胡银平
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2006-05-16
Filing date: 2006-05-16
Publication date: 2007-10-10
Anticipated expiration: 2016-05-16

Abstract

A heat conducting carbon dioxide freezing knife is provided, which relates to a freezing scalpel, the utility model is applied to the surgical treatments of tumors and skin diseases. The freezing knife includes an inlet pipe, a vent pipe, an upper cover, a handle, a knife head and heating wires. The part of the knife head which contacts with the tissues with pathological changes is provided with the plane red copper, the carbon dioxide after throttling is released to the inner surface of the knife head, the temperature of the tissues with pathological changes is changed through the heat conducting of the knife head, the carbon dioxide after the heat exchanging is discharged to the atmosphere by a vent-pipe. The outside of the knife head is provided with electric heating wires which can heat the knife head in order to realize the quick re-warming of the issues with pathological changes. The freezing knife has quick cooling speed, which can reduce the temperature from the room temperature to 60 degrees below zero within 80 seconds. The utility model has simple structure and small size and low cost.

Description

Heat-conducting CO 2Freezing cutter

Technical field:

This utility model relates to cryoprobe, is applied to the surgical intervention of tumor and dermatosis.

Background technology:

Along with to the tumor invasion Study on Mechanism, people have had further understanding to this world-famous puzzle of tumor, studies show that: tumor is a kind of disease of general.Just because of this, the tumor treatment effect is often not ideal enough.The common method of treatment tumor has at present: surgical operation, radiotherapy, chemotherapy and Chinese medicine etc.More than with kind of a Therapeutic Method, characteristics are respectively arranged.Wherein cryosurgery treatment tumor has obtained remarkable progress so far.

Present cryosurgery therapy mainly contains liquid nitrogen freezing cutter and argon helium knife.The cryotherapy that with the liquid nitrogen is cold-producing medium begins to be used for the hepatocarcinoma tumor treatment in eighties of last century, certain curative effect is arranged, but treatment time is long, and wound surface is big, and liquid nitrogen is volatile, the equipment requirements height, and it is applied and is restricted.The appearance of argon helium knife is an important breakthrough on the freezing medical history, but argon helium knife manufacturing requirement and manufacturing cost height, argon and helium price are expensive, make argon helium knife also fail to be used widely.

Summary of the invention:

The purpose of this utility model is above-mentioned the deficiencies in the prior art, and a kind of heat-conducting CO is provided ₂Freezing cutter is characterized in: because liquid CO ₂Gasification latent heat very big, certain amount of fluid CO ₂Can produce enough colds and destroy lesion tissue.While is controlling liquid CO artificially ₂Flow, cooling rate is fast, destroys pathological tissues thereby can lower the temperature rapidly; Heat-conducting CO in addition ₂The manufacturing cost of freezing cutter and operating cost will be more much lower than liquid nitrogen cryotherapy and the freezing cutter of argon helium.

In order to realize the purpose of above-mentioned utility model, its technical scheme is: this freezing cutter comprises air inlet pipe, exhaustor, top cover, handle, cutter head, heater strip; Described cutter head be meant with the contacted part of pathological tissues be the plane red copper, make the CO after the throttling ₂Be discharged on the cutter head inner surface, through the heat conduction change pathological tissues temperature of cutter head, through the gas CO after the heat exchange ₂Through the aerofluxus bank of tubes to atmosphere.There is electrical heating wire can heat cutter head in the cutter head outside, to realize rapid rewarming to pathological tissues.

The utlity model has following technique effect:

1, cooling rate is fast, drops to-60 ℃ from room temperature in 80s.

2, simple in structure, volume is little, and cost is low.

Description of drawings:

Fig. 1 is a main pseudosection of the present utility model, in Fig. 1:

1-air inlet pipe, 2-exhaustor, 3-top cover, 4-handle, 5-cutter head, 6-heater strip.

The specific embodiment:

Making an intracavity diameter is that 20mm, height are the handle 4 of 220mm, and handle thickness is the rigid plastic sheet of 5mm, and air inlet pipe 1 is passed through from the left and right sides of top cover 3 with exhaustor 2, and air inlet pipe 1 stretches into the inner chamber bottom, and exhaustor 2 is positioned at inner chamber top.Cutter head 5 links to each other with the inner chamber bottom, and cutter head 5 outer surfaces are twining heater strip 6.

Claims

1, a kind of heat-conducting CO ₂Freezing cutter comprises air inlet pipe, exhaustor, top cover, handle, cutter head, heater strip; The cutter head that it is characterized in that described freezing cutter is the plane red copper, and air inlet pipe and exhaustor pass through from the left and right sides of top cover, and air inlet pipe stretches into the inner chamber bottom, and exhaustor is positioned at inner chamber top; Cutter head links to each other with the inner chamber bottom, and the cutter head outer surface is twining heater strip.