JP2009034274A - Cautery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handy cautery which can select a heating capability independently of a cooling capability and is easy to handle. <P>SOLUTION: The cautery includes: a cylindrical container 1 whose front end surface is closed; a contact terminal 6 projecting outward through a front end partition wall of the cylindrical container 1; a heat conduction body 7 which is disposed in contact with a rear end surface of the contact terminal 6 inside the cylindrical container 1 and has a heater 8 embedded; a coolant filled cylinder 11 disposed on the back side of the heat conduction body 7 inside the cylindrical container 1 slidably in the axial direction; a cap 2 for closing the rear end part of the cylindrical container 1; and magnetic force granting means 13 and 14 which brings a front end surface 11c of the filled cylinder 11 into contact with a rear end surface 7b of the heat conducting body 7 when cooling down the contact terminal 6 and separating the front end surface 11c of the filled cylinder 11 from the read end surface of the heat conducting body when heating the same. The surrounding wall of the filled cylinder 11 is of a heat insulation structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cautery suitable for treatment of warts and stains, skin cancer, etc., and without using a Peltier module utilizing the Peltier effect, a heater and a coolant-filled cylinder are built in, and the ablation surface of the human body It is related with the handy cautery which is easy to handle, which makes it possible to heat or cool the contact terminal which contacts the heater and to select the heating capacity independently of the cooling capacity.

Conventionally, as a method for removing warts and stains, a method of applying liquid nitrogen mainly with a cotton swab or the like to necrotize skin tissue has been performed. However, this method is more painful because it cools and kills the affected area more than necessary. Moreover, a cotton swab etc. will adhere to skin.
As a cryosurgery device, a cryosurgery device using cooling (Juole-Thomson effect) by adiabatic expansion of high-pressure gas is known. In this case, since a high pressure gas is used, a pressure resistance is required at each part.

  In actual treatment, there are cases where not only frozen necrosis but also heated cautery is necessary, so by reversing ± of the power source, an ablation device using a Peltier element that can be heated as well as frozen is tried. For example, the method is disclosed in Non-Patent Document 1 ("Basic research of cryosurgery device using Peltier effect" Nagaoka University of Technology (Research Report 21 (1999), p. 125-130)). Yes. Non-Patent Document 1 discloses that it is necessary to use a refrigerant solution for heat removal and to change the type of the refrigerant solution (for example, tap water, ice water, saline) depending on the target temperature.

On the other hand, a Peltier module is arranged as a cooling terminal for cooling, and a method using a heater is also seen. However, this does not take advantage of the Peltier module, which can be heated by reversing the ± of the power supply.
In addition, there are several types of commercially available Peltier modules. If the end face is not sealed, dew condensation begins to adhere as the temperature decreases, and the Peltier module does not work. In order to prevent this, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2002-177296) employs a structure in which the Peltier module is housed in a vacuum atmosphere. However, this always requires a vacuum pump and has the disadvantage of being difficult to replace and repair in the event of a failure.

  In Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-261210), a Peltier module, a heat sink, and an external cooler are arranged from the front end side in a casing having a partition wall made of a heat insulating material, and the Peltier module is covered on the front end side. A Peltier cautery is disclosed in which a cover is provided and the inside of the cover is covered with a heat insulating gas layer, thereby enabling the Peltier element and its connected devices to be insulated without installing a vacuum vessel and related devices.

JP 2002-177296 A JP 2004-261210 A "Basic research on cryosurgery device using Peltier effect" Nagaoka University of Technology (Research Report 21 (1999), pages 125-130)

However, in the Peltier cautery, the cooling capacity and the heating capacity are determined by the Peltier module used, and the heating capacity cannot be selected independently of the cooling capacity. Further, since the Peltier module is configured by soldering, 80 ° C. is the limit, and treatment by burning out warts or the like cannot be performed.
In addition, the Peltier cautery needs to cool the end face of the Peltier module on the heating side using a cooler filled with a coolant such as dry ice, which reduces the heat efficiency and complicates the equipment. There is.

  In view of the problems of the prior art, the present invention provides a contact head that cools or heats the surface of a human body in contact with the surface of the body to be burned without using a Peltier module that utilizes the Peltier effect. Handy Peltier cautery that makes it easy to handle while using a heater such as ice to cool directly, while using a heater to select the heating capacity independently of the cooling capacity. It aims at realizing.

In order to achieve the above object, the cautery of the present invention
In a cautery device comprising a contact terminal heated or cooled by a built-in heat source, and performing treatment by applying the contact terminal to the ablation surface of a human body,
A cylindrical container with a closed front end surface;
A contact terminal penetrating the front end bulkhead of the cylindrical container and projecting outside,
A heat conductive material having good heat conductivity, which is configured integrally with the contact terminal inside the cylindrical container or arranged so as to be in contact with the rear end surface of the contact terminal and in which a heater is embedded;
A coolant-filled cylinder disposed slidably in the axial direction of the cylindrical container on the rear side of the heat conductor inside the cylindrical container;
A cap for closing the rear end of the cylindrical container;
Drive that causes the front end face of the coolant-filled cylinder to contact the rear end face of the heat conductor when the contact terminal is cooled, and separates the front end face of the coolant-filled cylinder from the rear end face of the heat conductor when the contact terminal is heated Consisting of means,
At least the peripheral wall of the filling cylinder surrounding the coolant or the peripheral wall of the cylindrical container has a heat insulating structure.

In the cautery of the present invention, when the ablation surface is cooled by the contact terminal, the contact terminal and the heat conducting body are configured integrally or the heat conducting body is in contact with the rear end surface of the contact terminal and the heat conducting body is provided. Since the front end face of the coolant filling cylinder is in contact with the rear end face of the body, the contact terminal is cooled from the filling cylinder via the heat conductor.
On the other hand, when heating the surface to be ablated by the contact terminal, the drive means separates the rear end surface of the heat conductor and the front end surface of the filling cylinder, and then the contact terminal is heated by a heater embedded in the heat conductor. Like that. For this reason, the heat of the heat conducting body heated by the heater is not directly transmitted to the filling cylinder.

Therefore, unlike the Peltier cautery using the Peltier effect, the heating capacity can be selected independently of the cooling capacity, and as a result, the heating capacity and the heating rate can be increased.
Moreover, since it is set as the structure which has arrange | positioned the contact terminal, the heat conductive body, and the coolant filling cylinder in order from the front end side in the inside of a cylindrical container, a cautery can be comprised compactly and handy.

  The driving means preferably comprises an iron core attached to the rear end surface of the coolant-filled cylinder and a solenoid coil disposed around the iron core, in contact with the rear end surface of the heat conductor or the A magnetic force applying means for separating the contacting cylinder disposed away from the rear end face from the rear end face of the heat conducting body by a magnetic force generated from the solenoid coil or contacting the rear end face; and an inner peripheral surface of the cylindrical container And a return spring that applies an elastic force to the filling cylinder to return the filling cylinder to its original position when the magnetic force application means is off.

  With this configuration, by energizing the solenoid coil, a magnetic force is generated in the axial direction of the filling cylinder with respect to the iron core, and the filling cylinder is moved in the axial direction. When the filling cylinder is arranged in contact with the rear end face of the heat conductor, a magnetic force is generated by the magnetic force applying means when the contact terminal is heated, and the filling cylinder is separated from the rear end face of the heat conductor to heat the heat conductor. Is not transmitted directly to the filling cylinder. In addition, when the filling cylinder is spaced apart from the rear end surface of the heat conductor, a magnetic force is generated by the magnetic force applying means when the contact terminal is cooled to bring the filling cylinder into contact with the rear end surface of the heat conductor, so that the contact terminal Heat is absorbed by the filling cylinder through the heat conductor and the contact terminals are cooled.

The cylindrical container preferably has a required strength and is made of a lightweight material, and is therefore made of a non-metallic material, preferably a polyether having excellent chemical resistance, friction wear resistance, and machinability. -It may be made of resin such as erell ketone (PEEK).
The contact terminal and the heat conductor are preferably made of a material having good thermal conductivity such as copper or aluminum. The same applies to the coolant-filled cylinder, but when it is desired to maintain a certain level of strength, for example, the steel surface may be coated with a material having good thermal conductivity such as copper or aluminum.

  Further, if the coolant-filled cylinder is encapsulated so that it can be freely inserted and removed from the cylindrical container and can be filled or replaced with the coolant, the coolant can be easily taken into and out of the filled cylinder. When liquid nitrogen or liquefied carbonic acid is used as the coolant, connect the filling tube from the cylindrical container to the coolant storage tank with a high-pressure hose, and fill the filling tube with the coolant through the high-pressure hose. After that, the filling cylinder is accommodated in the cylindrical container.

In the present invention, at least the peripheral wall of the filling cylinder surrounding the coolant or the peripheral wall of the cylindrical container needs to have a heat insulating structure, and the coolant needs to be kept cold. Excellent heat insulation function if a double cylinder structure is used and a vacuum is formed between the double cylinders, or a peripheral wall of the cylindrical container is a double cylinder structure and a heat insulating material is filled between the double walls. And the cooling effect of the coolant can be enhanced.
If a thermocouple is attached to the contact terminal, the surface to be ablated can be treated while measuring the temperature of the contact terminal, so that the treatment can always be performed at a temperature suitable for treatment.

  The filling cylinder may be filled with dry ice to which a small amount of ethanol (by weight, about 1/10 to 1/20 of dry ice) is added as a coolant. By adding ethanol, the heat transfer area in the filled cylinder can be secured, and dry ice sublimates from solid to gas at a temperature of −78.5 ° C. and absorbs latent heat of vaporization during sublimation, thereby making contact It is possible to adjust the head to a temperature of -40 ° C to 6 ° C.

  Moreover, if a harmless low-temperature brine such as ethylene glycol, propylene glycol, and saline is filled as the coolant, these brines do not have a harmful effect on the surface to be burned, and the handling becomes easy. When these brines are filled into a filling cylinder, the brine is separately stored in a cold storage room at −40 ° C. to −55 ° C., cooled, and mounted in a cylindrical container at the time of use.

In the cautery of the present invention, since the temperature of the contact terminal can be lowered using these coolants, the contact terminal is cooled to −50 ° C. without using a Peltier module and without changing the refrigerant solution. Is possible. Depending on the treatment, it may be necessary to maintain a slightly higher temperature range (for example, -30 ° C or -10 ° C), but when the temperature is reached by the coolant, it can be maintained at that temperature by passing a small amount of current through the heater. become.
Further, when heating, the contact means is heated to a high temperature exceeding + 100 ° C., for example, as long as the cylindrical container can withstand by separating the heat conducting body and the coolant-filled cylinder by the driving means and simultaneously passing an electric current through the heater. it can.

The coolant filling cylinder may be made of a material having good thermal conductivity such as copper or aluminum and have a volume capable of being filled with an amount of coolant capable of repeating cooling and heating for three cycles or more. preferable. This allows the treatment to continue without changing the coolant during at least one treatment.
The contact terminal may be appropriately selected from those having several tip shapes depending on the treatment content of the surface to be ablated, and in some cases, a contact terminal having a cutting edge may be selected and attached.

  According to the cautery apparatus of the present invention, a cylindrical container with a closed front end surface, a contact terminal that protrudes outside through the front end partition wall of the cylindrical container, and the contact terminal integrally with the inside of the cylindrical container Or a heat-conductive body with good heat conductivity in which a heater is embedded and disposed so as to be in contact with the rear end surface of the contact terminal, and the cylinder on the rear side of the heat-conductive body inside the cylindrical container. A coolant filling cylinder slidably disposed in the axial direction of the cylindrical container, a cap for closing the rear end of the cylindrical container, and a front end surface of the coolant filling cylinder when the contact terminal is cooled. Drive means for contacting the rear end face of the heat conductor and separating the front end face of the coolant filling cylinder from the rear end face of the heat conductor when the contact terminal is heated, and at least the peripheral wall of the filling cylinder surrounding the coolant or Since the peripheral wall of the cylindrical container has a heat insulating structure, the surface to be ablated is brought into contact with the surface to be ablated and cooled. Alternatively, the contact terminals to be heated can be cooled or heated without using a Peltier module that utilizes the Peltier effect, and when cooled, a cooling agent such as dry ice can be used to cool directly, while during heating, a heater can be used. Since the heating capacity can be selected independently of the cooling capacity, the heating rate and the heating capacity can be freely set.

Moreover, since it is set as the structure which has arrange | positioned the contact terminal, the heat conductive body, and the coolant filling cylinder in order from the front end side in the inside of a cylindrical container, a cautery can be comprised compactly and handy.
In addition, the partition wall filled with the coolant has a heat insulating structure, so the cooling effect of the coolant is high, and when the contact terminal is heated, the heater is separated from the embedded coolant and the coolant filling cylinder. Since the heat of the heater is not directly transmitted to the filling cylinder, the thermal efficiency is not impaired and the heating temperature can be controlled smoothly.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to that unless otherwise specified.
(Embodiment 1)

  FIG. 1 is a sectional elevation view showing the overall configuration of the first embodiment of the present invention device, FIG. 2 is a left side view, and FIG. 3 is a right side view.

  1 to 3, the outer cylinder 1 constituting the cautery body has a hollow cylindrical shape, and the outer cylinder 1 is a polyether excellent in chemical resistance, friction wear resistance, machinability and the like. -It is made of erell-ketone (PEEK) resin, and a cup-shaped end cap 2 made of PEEK is similarly attached to the rear end of the outer cylinder 1. A knob 3 for rotating the cap is attached to the rear end surface of the end cap 2. By turning the knob 3, the screw portion on the inner surface of the tip end of the cap is screwed into the screw portion on the outer end surface of the outer cylinder. The looseness of the screw part is eliminated.

  The positioning bolt 4 has a front end surface 4a positioned inside the cap 2 to determine the position of an iron core 13 to be described later. The position of the front end surface 4a is locked by a lock nut 17. Further, the maximum protrusion amount of the positioning bolt front end surface 4a inside the cap 2 is regulated by the stopper ring 5 that is locked to the step portion 3a of the knob 3.

  The front end portion of the outer cylinder 1 is closed except for the small diameter hole 1 a, the contact terminal 6 is fitted into the small diameter hole 1 a, and the rear end surface of the contact terminal 6 is the front end of the heat conducting body 7 disposed inside the outer cylinder 1. It is in contact with the surface 7a. The contact terminal 6 is made of copper having good thermal conductivity, and Au plating is applied to the contact terminal surface for imparting corrosion resistance and good thermal conductivity from the viewpoint of not adversely affecting the human body. The heat conductor 7 is also made of a material having good thermal conductivity such as copper or aluminum, and a ceramic heater 8 is embedded therein.

  A thermocouple 9 is attached to the contact terminal 6 to enable temperature measurement, and a lead wire 10 connected to an external power source is connected to the ceramic heater 8. A coolant filling cylinder 11 is disposed on the rear end side of the heat conducting body 7, and the rear end face 7 b of the heat conducting body 7 and the front end face 11 c of the filling cylinder 11 are dimension m (0) by the elastic force of the return spring 15 described later. .5 to 1 mm) apart.

  The coolant-filled cylinder 11 is made of SUS, copper-plated, configured to have strength and good thermal conductivity, and has a double cylinder structure including an inner cylinder 11a and an outer cylinder 11b, and the inner cylinder 11a. The space s between the outer cylinder 11b and the outer cylinder 11b is fitted with a sealing O-ring 11d at the end to form a vacuum state. A vacuum state is formed by connecting a suction device (not shown) to the plug 18 with the end cap 2 removed from the outer cylinder 11 and sucking air in the space s to form a vacuum state. As a result, heat insulating properties are imparted to the periphery of the coolant, and the cold retention of the coolant is enhanced.

  An end plate 20 is attached to the rear end surface of the coolant-filled cylinder 11 with a bolt 19 to shield the internal space of the inner cylinder 11a. A coolant r is filled in the internal space of the inner cylinder 11a. For filling, with the end cap 2 removed from the outer cylinder 11, the filling cylinder 11 is taken out of the cylindrical container, the end plate 20 is removed, and the coolant is filled. As the coolant, for example, dry ice or brine such as ethylene glycol, propylene glycol, and saline may be filled.

When filling a solid coolant such as dry ice, a small amount of ethanol (by weight, 1/10 to 1 of dry ice) is used to secure the contact area between the inner surface of the filling cylinder and the coolant to improve heat transfer. / 20) may be added.
When filling with brine such as ethylene glycol, propylene glycol, and saline, this is separately stored in a cold storage room at −40 ° C. to −55 ° C., cooled, and mounted in a cylindrical container at the time of use.

  The coolant filling amount in the filling cylinder 7 is set so that the coolant can be filled with an amount of coolant that can be repeatedly cooled and heated for at least three cycles in view of the therapeutic effect on the surface to be ablated. The treatment can be continued without changing the coolant for at least one treatment without frequent replacement.

  After the filling cylinder 11 is filled with the coolant, the end plate 20 is attached with the bolts 19 to seal the inner cylinder 11 a, and then the filling cylinder 11 is inserted into the outer cylinder 1. A shaft rod 12 is attached to the end plate 20 of the filling cylinder 11 in the axial direction of the filling cylinder. That is, the male screw on the surface of the shaft rod 12 is screwed into the female screw provided on the inner surface of the cylindrical groove of the end plate 12. A disc-shaped iron core 13 is attached to the other end of the shaft rod 12 in a direction perpendicular to the shaft rod.

A solenoid coil 14 is mounted on the inner surface of the end cap 2 around the iron core 13 so as to surround the iron core 13, and a direct current is supplied to the solenoid coil 14 from an external power source (not shown) via a lead wire 14a. Magnetic force applying means for applying a magnetic force to the iron core 13 in the direction of arrow a is configured.
On the other hand, a coiled return spring 15 is mounted along the inner surface of the terminal portion of the outer cylinder 1, and the iron core 13 contacts the tip end surface 4 a of the positioning bolt 4 in the filling cylinder 11 by the elastic force of the return spring 15. Held in the position.

At this time, the rear end face 7b of the heat conductor 7 and the front end face 11c of the filling cylinder 11 are in a state (original position) separated by a dimension m (0.5 to 1 mm). On the other hand, when the magnetic force applying means is operated, the filling cylinder 11 moves in the direction of arrow a, and the front end face 11c of the filling cylinder 11 comes into contact with the rear end face 7b of the heat conductor 7.
On the other hand, the movement of the filling cylinder 11 causes the iron core 13 and the tip end surface 4a of the positioning bolt 4 to be separated by a dimension m (0.5 to 1 mm). When the operation of the magnetic force applying means is stopped, the filling cylinder 11 is returned to the original position by the elastic force of the return spring 15.

  In the first embodiment having such a configuration, in the case of performing a treatment for cooling the ablation surface (not shown) of the human body, the magnetic force applying means is filled with the coolant r inside the inner cylinder 11a of the filling cylinder 11. To move the filling cylinder 11 in the direction of arrow a from the original position where the rear end surface 7b of the heat conducting body 7 and the front end face 11c of the filling cylinder 11 are separated by the dimension m, and the rear end face of the heat conducting body 7 The front end face 11c of the filling cylinder 11 is brought into contact with 7b. In this state, the contact terminal 6 is cooled by the cooling action of the coolant r, and the cooled contact terminal 6 is applied to the ablation surface to perform treatment.

  Further, when a treatment for heating the surface to be cauterized is performed, by stopping the operation of the magnetic force applying means, the filling cylinder 11 is moved in the direction opposite to the arrow a direction by the elastic force of the return spring 15 and the iron core. 13 is brought into contact with the front end surface 4 a of the positioning bolt 4. As a result, the rear end surface 7b of the heat conductor 7 and the front end surface 11c of the filling cylinder 11 are separated by a dimension m (0.5 to 1 mm), and then the lead wire 10 is energized to heat the ceramic heater 8.

  As a result, the heat conductor 7 is heated. However, since the coolant filling cylinder 11 is separated from the heat conductor 7, the heat of the heat conductor 7 is not directly transmitted, and the coolant can be kept cold. On the other hand, the heat of the heat conductor 7 is transmitted to the contact terminal 6 to heat the contact terminal 6, and the heated contact terminal 6 is applied to the ablation surface to perform treatment. Note that the value of the current that flows through the ceramic heater 8 can be controlled by an end winding transformer or the like.

In the first embodiment, the temperature rise rate of the contact terminal 6 during heating is greatly influenced by the voltage applied to the ceramic heater 8, and for example, by applying a load of 80 V (0.75 to 0.85 A), a sufficient heating temperature is obtained. And the heating rate was faster than the Peltier cautery.
At the time of cooling, by using dry ice to which ethanol was added as a coolant, when the diameter of the contact terminal 6 was 3 mm and 5 mm, the lowest achieved temperature could be lowered to −55 ° C. It was also found that the cooling rate was faster than the Peltier cautery.

  When it is necessary to maintain a slightly higher temperature range (for example, −30 ° C. to −10 ° C.) depending on medical contents, the temperature can be maintained by passing a small current through the ceramic heater 8 when the temperature is reached. .

  As described above, according to the present embodiment, the contact terminal 6 can be cooled or heated with one cautery, and the heat conducting body 7 and the filling cylinder 11 are separated from each other during heating. Heating can be performed without impairing the state, and cooling capacity and heating capacity can be set independently. In addition, since the contact terminal 6 is directly heated by the heater 8 via the heat conductor 7, the heating effect is great, and the contact terminal 6 is cooled by the coolant r of the filling cylinder 11 via the heat conductor 7. Therefore, the cooling effect can be increased.

Further, since the contact terminal 6, the heat conductor 7, the coolant filling cylinder 11, and the magnetic force applying means are arranged in this order from the front end side inside the outer cylinder 1 on the cylinder, the cautery is compact and easy to handle. Can be configured.
Since the peripheral wall of the filling cylinder 11 is a heat insulating structure having a double cylinder structure with a vacuum in between, the cooling effect of the coolant is high.

  Further, as means for bringing the front end face 11c of the filling cylinder 11 into contact with the rear end face 7b of the heat conductor 7, a shaft rod 12 attached to the rear end face of the filling cylinder 11, a disk-shaped iron core 13 attached to the shaft rod, and iron Since the return coil 15 is employed as a means for returning the front end surface 11c of the filling cylinder 11 from the rear end surface 7b of the heat conducting body 7 to the original position, the solenoid coil 14 disposed around the core 13 is used. It can be put together in a compact configuration.

Contrary to the first embodiment, a magnetic force is applied in a direction in which the filling cylinder 11 is separated from the heat conducting body 7, and the elastic force of the return spring is applied in a direction in which the filling cylinder 11 is in contact with the heat conducting body 7. Good.
Further, the coolant filling cylinder 11 is encapsulated and can be taken in and out of the outer cylinder 1 and can be filled or replaced with the coolant, so that the handling is easy.
(Embodiment 2)

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional elevation view showing a partial configuration of the second embodiment. This embodiment is an embodiment in the case of using liquid nitrogen or liquefied carbonic acid as a coolant. In FIG. 4, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The configuration of this embodiment is different from the first embodiment in that a plug 21 with a check valve for supplying a coolant is attached to the end plate 20.

With such a configuration, the end cap 2 is first removed from the rear end of the outer cylinder 1, the shaft rod 12 is removed from the end plate 20, and a high-pressure tank 23 storing liquid nitrogen or liquefied carbonic acid is prepared. A high pressure hose 22 is connected to the high pressure resistant tank 23, and liquid nitrogen or liquefied carbonic acid is injected into the inner cylinder 11a. After the injection, the check valve 21a of the plug 21 automatically shields the inner cylinder 11a.
Thereafter, the shaft rod 12 to which the iron core 13 is attached and the end cap 2 to which the solenoid coil 14 is attached are attached to the rear end of the outer cylinder 1 and the same operation as in the first embodiment is performed.

  According to the second embodiment, the coolant having a large cooling capacity can be easily filled without removing the filling tube 11 from the outer tube 1.

  According to the present invention, a compact and easy-to-handle cautery can be realized with high cooling capacity and heating capacity.

It is a section elevation showing the whole composition of a 1st embodiment of the present invention. It is a left view of the said 1st Embodiment. It is a right view of the first embodiment. It is a section elevation showing a partial composition of a 2nd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Terminal cap 4 Positioning bolt 4a Positioning front end surface 6 Contact terminal 7 Heat conductor 8 Ceramic heater 9 Thermocouple 11 Coolant filling cylinder 12 Shaft bar (magnetic force applying means)
13 Iron core (magnetizing means)
14 Solenoid coil (magnetic force applying means)
15 Return spring 20 End plate

Claims (9)

In a cautery device comprising a contact terminal heated or cooled by a built-in heat source, and performing treatment by applying the contact terminal to the ablation surface of the human body,
A cylindrical container with a closed front end surface;
A contact terminal penetrating the front end bulkhead of the cylindrical container and projecting outside,
A heat conductive material having good heat conductivity, which is configured integrally with the contact terminal inside the cylindrical container or arranged so as to be in contact with the rear end surface of the contact terminal and in which a heater is embedded;
A coolant-filled cylinder disposed slidably in the axial direction of the cylindrical container on the rear side of the heat conductor inside the cylindrical container;
A cap for closing the rear end of the cylindrical container;
Drive that causes the front end face of the coolant-filled cylinder to contact the rear end face of the heat conductor when the contact terminal is cooled, and separates the front end face of the coolant-filled cylinder from the rear end face of the heat conductor when the contact terminal is heated Consisting of means,
A cauterizer characterized in that at least the peripheral wall of the filling cylinder or the peripheral wall of the cylindrical container surrounding the coolant has a heat insulating structure. The drive means
It consists of an iron core attached to the rear end surface of the coolant-filled cylinder and a solenoid coil disposed around the iron core, and is in contact with or separated from the rear end surface of the heat conductor. Magnetic force applying means for separating the arranged filling cylinder from the rear end surface of the heat conducting body by the magnetic force generated from the solenoid coil or contacting the rear end surface;
And a return spring that is arranged along the inner peripheral surface of the cylindrical container and applies an elastic force to the filling cylinder to return the filling cylinder to its original position when the magnetic force application means is off. The shochu device according to claim 1.   The cauterizer according to claim 1, wherein the coolant-filled cylinder is encapsulated so that it can be taken in and out of the cylindrical container and can be filled or replaced with the coolant.   The high-pressure hose is connected to the coolant filling cylinder, and liquid nitrogen or liquefied carbonic acid is filled through the high-pressure hose.   In the heat insulation structure, the peripheral wall partition of the coolant filling cylinder is a double cylinder structure, and the space between the double cylinders is evacuated, or the peripheral wall of the cylindrical container surrounding the circumferential surface of the coolant filling cylinder is 2 The cauterizer according to claim 1, wherein a double cylinder structure is used, and a heat insulating material is filled between the double walls.   The ablation device according to claim 1, wherein a thermocouple is attached to the contact terminal.   The cauterizer according to claim 1, wherein the filling cylinder is filled with dry ice added with ethanol.   The cauterizer according to claim 1, wherein the filling cylinder is filled with low-temperature brine.   2. The coolant-filled cylinder is made of a material having good thermal conductivity and has a volume capable of being filled with an amount of coolant capable of repeating cooling and heating for three or more cycles. Shochu.

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