JP2000201947A - Accessory parts of bipolar electric tweezers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide existing bipolar electric tweezers with cooling function. SOLUTION: A body part 18 formed as a separate body from a tweezer body 11 is provided with a perfusion tube for supplying physiological saline. The front end of the body part 18 is provided with a fitting part 25 for fitting it to the tweezer body 11. With this constitution, the fitting part 25 is fitted to the tweezer body 11 to mount the body part 18 to the tweezer body 11. Existing bipolar electric tweezers without the perfusion tube can therefore be provided with cooling function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bipolar electric tweezers used for hemostasis and incision in surgery, mainly in neurosurgery.

[0002]

2. Description of the Related Art Bipolar electric tweezers of this type are provided with a pair of electrode portions inside the front end of a bifurcated tweezers body which can be opened and closed. A high-frequency generator is electrically connected to the rear end of the tweezers main body, and a high-frequency current is supplied from the high-frequency generator to each electrode unit. An insulating film is formed on the tweezers body except for the electrodes. Then, a high-frequency current is applied to the electrode section in a state where an affected part such as a living tissue or a blood vessel is held between the front ends of the tweezers main body. Then, the affected part is coagulated (hemostatic) by the Joule heat effect, or the affected part is incised by the discharge effect.

However, due to the use of high-frequency current, the affected area generates heat during coagulation or incision. Therefore, heat is also transmitted to normal tissues around the affected part to be treated, and even normal tissues may be destroyed. So, in order to solve such a problem,
2. Description of the Related Art Conventionally, an arrangement in which a perfusion tube is provided inside a tweezer body has been proposed. According to the bipolar electric tweezers, at the time of coagulation or incision of an affected part, a physiological saline as a perfusate is dropped through a perfusion tube. As a result, the amount of heat generated in the affected area due to the high-frequency current is reduced, and damage to the tissue can be minimized.

[0004]

However, existing bipolar electric tweezers without a perfusion tube have no function of cooling the affected area. Therefore, a new bipolar electric tweezer with a perfusion tube must be purchased to provide a cooling function.

The present invention has been made in view of the above problems, and has as its object to provide a bipolar electric tweezer having a cooling function by arranging a perfusion tube on an existing tweezer body. To provide tweezers accessories.

[0006]

According to the first aspect of the present invention, an electrode portion is provided inside a front end of a tweezers body which can be opened and closed, and a high-frequency current is supplied to the electrode portion. By applying heat to the affected part, it is an accessory used for bipolar electric tweezers for coagulating or incising the affected part, and a body part formed separately from the tweezer body, and the body part Is provided along
The gist of the invention is to provide a pipe through which a fluid can pass, and a mounting portion provided on the body portion and engaging with the tweezer body to mount the body portion.

According to a second aspect of the present invention, in the accessory for the bipolar electric tweezers according to the first aspect, the gist is that the mounting portion is detachable from the tweezer body.

According to a third aspect of the present invention, in the accessory for the bipolar electric tweezers according to the first or second aspect, the tube is for supplying a perfusion tube for supplying a perfusion solution to an affected part and for pumping compressed gas. The gist is that there are two types of pumping pipes.

The "action" of the present invention will be described below. According to the first aspect of the present invention, the body is attached to the bipolar electric tweezers by engaging the attachment with the existing tweezers main body. Then, at the time of coagulation or incision of the diseased part, a fluid such as a perfusate is supplied to the diseased part through a tube. Thereby, the temperature rise around the affected part due to the high-frequency current is reduced, and the damage to the tissue can be minimized.

According to the second aspect of the present invention, since the mounting portion is detachable from the tweezer body, the body portion can be detached from the tweezer body when the bipolar electric tweezer is not used. Therefore, since it is easy to clean, it is a preferable accessory in terms of hygiene.

According to the third aspect of the present invention, at the time of coagulation or incision of the diseased part, the perfusate is supplied to the diseased part through the perfusion tube and the compressed gas is supplied through the pressure pipe. Thereby, the affected part is cooled, and the compressed gas is blown out toward the electrode part of the tweezer body through the pressure pipe. Therefore, it becomes difficult for the perfusate to accumulate between the two electrode portions. Therefore, it is difficult for both electrodes to be electrically short-circuited via the perfusate, and Joule heat is reliably generated at the affected part.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2, the tweezer body 11 having a pair of arms 11a and 11b is formed in a forked shape, and its front end is openable and closable. The front end of the tweezer body 11 is always open, and is closed against its own elastic force. In this embodiment, the tweezer body 11 is used.
Is used as a material for forming the arms 11a and 11b. This is because the tweezers main body 11 is excellent in conductivity and biocompatibility, and the weight of the tweezers main body 11 is reduced.

Electrodes 12 and 13 are formed on the inner surface of the front end of the tweezers body 11 so as to face each other. or,
A high-frequency generator (not shown) is electrically connected to a connection portion 14 formed at the rear end of the tweezer body 11. Then, a high-frequency current from the high-frequency generator is supplied to each of the electrode portions 12 and 13. Note that the tweezers main body 1 excluding the electrode portions 12 and 13 and the connection portion 14
The surface of 1 is coated with Teflon (ethylene tetrafluoride). As a result, portions other than the electrode portions 12 and 13 and the connection portion 14 are insulated.

As shown in FIGS. 1 to 4, an accessory part 17 is provided inside the arm part 11 a of the tweezers main body 11. The accessory part 17 includes a body portion 18 made of synthetic resin that is separate from the tweezer body 11, and the body portion 18 extends along the longitudinal direction of the tweezer body 11. The thickness of the body 18 is smaller than the thickness of the arms 11a and 11b of the tweezer body 11. This is to improve the operability of the tweezer body 11 by eliminating unevenness between the arms 11a and 11b.

At the rear end of the body portion 18, the both arm portions 11 are provided.
A thick portion 19, which can be inserted and arranged, is integrally formed between a and 11b, and stoppers 20 protrude outward on both lower ends thereof. When the thick portion 19 is inserted between the rear ends of the arms 11a and 11b, the upper surface of the stopper 20 comes into contact with the lower surfaces of the arms 11a and 11b.

A screw hole 21 extending in the vertical direction is formed in the thick portion 19, and a mounting screw 22 is screwed into the screw hole 21 so as to be able to advance and retreat. The diameter of the head 22a of the mounting screw 22 is larger than the width between the rear ends of the arms 11a and 11b. By tightening the mounting screw 22, the rear ends of the arms 11a and 11b are sandwiched between the head 22a and the stopper 20.

At the front end of the body portion 18, a horizontally concave mounting portion 25 is integrally formed, and the mounting portion 25 is detachably attached to the arm portion 11a of the tweezer body 11. The base 25a of the mounting portion 25 is formed to extend from the front end of the body portion 18, and elastically deformable sandwiching pieces 25c and 25d are formed at upper and lower ends of the base 25a. The body 18 is attached to the arm 11a of the tweezer body 11 by the front end of the arm 11a being sandwiched between the sandwiching pieces 25c and 25d against its elastic force.

As shown in FIG. 1, FIG. 3 and FIG.
8 has a groove 28 extending along its longitudinal direction.
Are formed. In the groove 28, a perfusion pipe 29 for pumping a perfusate as a fluid is provided.
In the present embodiment, a physiological saline is used as the perfusate. The front end of the perfusion tube 29 is connected to a discharge tube 30 provided inside the mounting portion 25. Discharge pipe 3
The discharge port of 0 is directed to one electrode 12. Then, the physiological saline is dropped from the front end of the discharge pipe 30 via the perfusion pipe 29.

Next, how to use the accessory 17 of the bipolar electric tweezers configured as described above will be described.
To attach the accessory 17 to the existing bipolar electric tweezers, proceed as follows. That is, the body portion 18 is disposed between the arms 11a and 11b, and the thick portion 19 is inserted into the rear ends of the arms 11a and 11b. At this time, since the upper surface of the stopper 20 is in contact with the lower surfaces of the arms 11a and 11b, the body 18 is positioned. In this state, the mounting screw 22 is tightened into the screw hole 21 of the thick portion 19. Then, the arm portions 11a and 11b are sandwiched between the head portion 22a of the mounting screw 22 and the stopper 20 with a predetermined pressing force. As a result, the rear end of the body 18 is attached to the arm 11a.

The arm 11 is provided in the mounting portion 25 of the body 18.
Insert the front end of a. As a result, the front end of the body 18 is attached to the arm 11a. In this state,
Since the holding pieces 25c, 25d are slightly opened outward against the elastic force, the upper and lower portions of the arm 11a are pressed by the holding pieces 25c, 25d. Therefore, the arm portion 11a does not accidentally come out of the mounting portion 25.

When the body portion 18 is detached from the arm portion 11a of the tweezers main body 11, the operation may be performed in the reverse order of the above-described operation, and the detailed description will be omitted since it has already been described.

Then, while the diseased part such as a living tissue or a blood vessel is held between the front ends of the tweezers main body 11, the electrode part 1
When a high-frequency current is applied to 2, 13 the Joule heat is generated in the affected area. Thereby, the affected part is coagulated or incised.
At the time of this coagulation or incision, physiological saline is dripped from the front end of the perfusion tube 29 toward the electrode parts 12 and 13, and the affected part and its peripheral part are cooled. Therefore, even if the affected part generates heat due to the high-frequency current, the heat does not affect normal tissues around the affected part being treated. In addition, even if the affected part is cooled, it is cooled to such an extent that coagulation or incision is not affected.

Therefore, according to the present embodiment, the following effects can be obtained. (1) The body 18 formed separately from the tweezers main body 11 is provided with a perfusion tube 29 for supplying physiological saline. At the front end of the body portion 18 is provided an attachment portion 25 for attaching the body portion 18 to the tweezer body 11. With this configuration, the body 18 can be attached to the tweezer body 11. Therefore, the existing bipolar electric tweezers without the perfusion tube 29 can be provided with a cooling function. In addition, it is not necessary to newly purchase expensive bipolar electric tweezers provided with the perfusion tube 29, so that the cost is not particularly increased.

(2) A thick portion 19 having a screw hole 21 is formed at the rear end of the body portion 18. And the thick part 1
9 is inserted into both arm portions 11a and 11b,
When the mounting screw 22 is tightened, the head end 22a of the mounting screw 22 and the stopper 20 sandwich the rear end portion of the tweezer body 11. For this reason, it is possible to prevent the rear end of the body portion 18 from rattling with respect to the tweezer body 11. Therefore, the physiological saline is applied to the electrode unit 1.
It can be reliably supplied to 2 and 13.

(3) Since the mounting portion 25 is formed in a laterally concave shape, the front end portion of the body portion 18 can be easily mounted on the tweezer body 11. Further, since the mounting portion 25 is fitted from the inside of the tweezers main body 11, when the accessory 17 is mounted, each of the holding pieces 25b and 25c protrudes outside the tweezers main body 11. Therefore, the operability of the tweezer body 11 can be ensured, and the field of view of the front end of the tweezer body 11 can be secured.

(4) The mounting portion 25 has elastically deformable holding pieces 25c and 25d. For this reason, when the front end of the arm portion 11a is fitted into the mounting portion 25, the holding piece 25
c, 25d open slightly outward against its elastic force. Therefore, the upper and lower portions of the arm portion 11a are pressed by the sandwiching pieces 25c and 25d, and it is possible to reliably prevent the arm portion 11a from falling out of the mounting portion 25.

(4) Since the mounting portion 25 is detachable from the arm portion 11a of the tweezer body 11, the arm portion 11a of the tweezer body 11 is used when the bipolar electric tweezer is not used.
The body portion 18 can be removed from the main body. Therefore,
Since the tweezers main body 11 and the accessory 17 can be separately washed, it is preferable in terms of hygiene. (Second Embodiment) Next, a second embodiment of the present invention will be described.
The following description focuses on the differences from the first embodiment.

In the second embodiment, as shown in FIG. 6, a discharge pipe 30 provided at the front end of the body 18 is provided.
And the grooves 28 are omitted. A perfusion tube 29 is embedded in the body 18 by insert molding. Further, a gas pressure feed pipe 35 is embedded in the body 18 by insert molding along with the perfusion pipe 29. Carbon dioxide gas (inert gas) as a compressed gas is pressure-fed into the gas pressure pipe 35. The outlet of the perfusion tube 29 and the outlet of the pressure feed tube 35 are directed to the electrodes 12 and 13. The perfusion tube 29 and the pressure feeding tube 35 are made of stainless steel, which is a biocompatible material.

Next, the operation of the second embodiment will be described below. In addition, the accessory 17
Since the mounting of is the same as in the first embodiment, the description is omitted.

During coagulation or incision of the affected area, the perfusion tube 2
The saline is dripped through 8 to cool the affected area. At the same time, carbon dioxide gas is blown out toward the electrode portions 12 and 13 via the pressure feed pipe 35. Therefore, the physiological saline does not accumulate between the two electrode portions 12 and 13.

Therefore, in the second embodiment, substantially the same effects as in the first embodiment can be exerted. Further, in the second embodiment, since the physiological saline does not accumulate between the two electrode portions 12 and 13, it is possible to prevent the two electrode portions 12 and 13 from being electrically short-circuited via the physiological saline. be able to. As a result, Joule heat can be reliably generated in the affected area, and coagulation or incision of the affected area can be reliably performed.

The embodiment of the present invention may be modified as follows. -As another example in the first embodiment, carbon dioxide may be passed through the perfusion tube 29 together with physiological saline. With this configuration, during this coagulation or incision, a mist-like physiological saline solution containing carbon dioxide gas can be blown out from the front end of the perfusion tube 29 toward the electrode portions 12 and 13.
Therefore, physiological saline does not accumulate between the electrode portions 12 and 13. At the same time, the blood coming out of the affected part is washed by the mist-like physiological saline, so that the affected part is not stained red and is easy to see.

As another example of the first embodiment, the material forming the body portion 18, the thick portion 19, the stopper 20, and the mounting portion 25 may be changed from a synthetic resin to a lightweight metal such as aluminum.

FIG. 7 shows another example of the second embodiment.
As shown in FIG. 5, a retaining portion 40 may be formed at the tip of the upper holding piece 25a of the mounting portion 25 so as to face the lower holding piece 25b. With this configuration, it is possible to more reliably prevent the arm portion 11a of the tweezers body 11 from coming off from inside the mounting portion 25. Also, although not shown,
The retaining portion 40 may be formed at the tip of the lower sandwiching piece 25b.

As another example of the first and second embodiments, as shown in FIGS.
Hook-shaped locking portion 41 engageable with one arm portion 11b
To form A screw member 42 is screwed to the rear end portion of the body portion 18 at a position below the locking portion 41 so as to be able to advance and retreat.
Then, in order to attach the accessory 17 to the existing bipolar electric tweezers, the body 18 is disposed between the arms 11a and 11b, and the engaging portion 41 is locked to the arm 11b. afterwards,
When the screw member 42 is rotated, the head 4 of the screw member 42 is rotated.
2a is pressed against the inner surface of the arm 11b, and the outer surface of the rear end of the body 18 is pressed against the other arm 11a. Thereby, the rear end of the body 18 is attached to the arm 11a. Therefore, according to this configuration, the screw member 42 may be tightened in a state where the engagement portion 41 is locked to the arm portion 11b, so that not only the mounting operability is good, but also the body portion 1
8 can be more reliably prevented from coming off the tweezer body 11.

As another example of the first and second embodiments, a laterally concave mounting portion 25 may be formed at the rear end of the body portion 18. With this configuration, the tweezer body 1
1, the body 18 can be more easily mounted.

As another example of the first and second embodiments, other liquids may be used besides using physiological saline as the perfusate. -As another example in the first and second embodiments, instead of carbon dioxide, any gas that is safe for a living body may be used.

As another example of the first and second embodiments, the body 18 is connected to the arm 1 of the tweezers body 11.
It may be arranged outside 1a. However, in this case, the distal ends of the perfusion tube 29 and the pressure feed tube 35 are arranged facing the electrode portions 12 and 13.

As another example of the first and second embodiments, the body 18 is connected to the arm 11 a of the tweezers body 11.
(Or 11b) may be in contact with the inner surface, and the contact surface may be attached with an adhesive or the like.

Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the above-described embodiments will be listed below together with their effects. (1) The bipolar electric tweezers according to claim 3, wherein the outlet of the perfusion tube and the outlet of the gas pressure tube are arranged toward the electrode portion.

According to this configuration, since the perfusate and the compressed gas are blown out between the two electrode portions, it is possible to reliably prevent the perfusion solution from being accumulated between the two electrode portions. (2) In claim 3 or (1), the perfusion pipe and the gas pressure feed pipe are attached to a body portion provided on the inner side surface of the tweezers body while the attachment portion is held by the tweezers body. Bipolar electric tweezers.

According to this configuration, it is possible to easily attach the perfusion tube and the gas pressure feeding tube while attaching the accessory to the tweezers main body. (3) In any one of claims 3, (1) and (2),
Bipolar electric tweezers, characterized in that a perfusion tube and a gas pumping tube are buried in the body.

According to this configuration, since the perfusion tube and the gas pressure feeding tube are not in the field of view at the front end of the tweezers main body, the diseased part can be easily recognized. (4) The bipolar electric tweezers according to any one of claims 1 to 3 and (1) to (3), wherein the body and the mounting portion are integrally formed.

According to this structure, not only the appearance is excellent, but also the manufacturing cost can be reduced. (5) The bipolar electric tweezers according to any one of claims 1 to 3 and (1) to (4), wherein a material for forming the body and the mounting portion is a synthetic resin.

According to this configuration, the weight of the accessory parts can be reduced. (6) The bipolar electric tweezers according to (5), wherein the material for forming the body and the mounting portion is a synthetic resin having heat resistance.

According to this configuration, during coagulation or incision, even if the temperature of the electrode portion rises, it can withstand sufficiently. (7) Bipolar electric tweezers according to any one of claims 1 to 3 and (1) to (4), wherein the material forming the body and the mounting portion is a lightweight metal.

According to this configuration, the weight of the accessory parts can be reduced. (8) The bipolar electric tweezers according to any one of claims 1 to 3 and (1) to (7), wherein the thickness of the body is smaller than the thickness of the tweezer body.

According to this configuration, the visual field inside the tweezers main body can be sufficiently ensured, so that the affected part can be more easily visually recognized. (9) The bipolar electric tweezers according to any one of claims 1 to 3, and (1) to (8), wherein the material for forming the tweezers body is titanium.

According to this configuration, the strength of the tweezer body can be increased, and the weight can be reduced.

[0050]

As described in detail above, according to the first aspect of the present invention, a perfusion tube can be provided in the existing tweezers main body, and the bipolar electric tweezers can have a cooling function.

According to the second aspect of the present invention, when the bipolar electric tweezers is not used, the body can be removed from the tweezers main body, so that the tweezers main body and the accessory parts can be separately washed. Therefore, it is preferable in terms of hygiene.

According to the third aspect of the present invention, it is possible to prevent the perfusion solution from being accumulated between the two electrode portions, thereby preventing the two electrode portions from being electrically short-circuited via the perfusion solution. be able to. Therefore, Joule heat can be reliably generated in the affected area.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a tweezers main body and attached parts in a first embodiment.

FIG. 2 is a perspective view of an accessory attached to a tweezer body.

FIG. 3A is a plan view of an accessory attached to a tweezer body, and FIG. 3B is a side view of the accessory without the tweezer body.

FIG. 4 is a sectional view taken along line 4-4 in FIG.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3 (b).

FIG. 6 is a perspective view showing a front end of an accessory according to the second embodiment.

FIG. 7 is another example of the second embodiment, and is a perspective view showing a front end of an accessory.

FIG. 8 is another example of the second embodiment, and is an exploded perspective view of an accessory part and a tweezer body.

FIG. 9 is a sectional view showing an assembled state of FIG. 8;

[Explanation of symbols]

11: Tweezer body, 12, 13: Electrode part, 17: Accessories, 18: Body part, 25: Mounting part, 29: Perfusion tube (tube), 35: Pumping tube (tube).

Claims (3)

[Claims] 1. An bipolar electric tweezer in which an electrode portion is provided inside a front end of a tweezers body that can be opened and closed, and a high frequency current is applied to the electrode portion to apply heat to the affected portion to coagulate or incise the affected portion. A body part formed separately from the tweezers body, a pipe provided along the body part and capable of passing a fluid, and provided on the body part. And a mounting part for engaging the tweezer body to mount the body part. 2. The accessory part of the bipolar electric tweezers according to claim 1, wherein the mounting part is detachable from a tweezer body. 3. The bipolar electric device according to claim 1, wherein the pipe is a perfusion pipe for supplying a perfusate to an affected part and a pumping pipe for pumping compressed gas. Tweezer accessories.