JP2020093021A - Bipolar electric tweezers - Google Patents

Abstract

To provide a bipolar electric procoagulant apparatus capable of integrating a suction function with a coagulating function so as to stop bleeding in a microsurgery under endoscope such as in otolaryngology, cephalocervical surgery, and neurosurgery or under microscope by considering circumstances.SOLUTION: Bipolar electric tweezers have a pair of arm parts. The pair of arm parts have electrodes at the end respectively. The pair of arm parts have base ends fixed to connection parts of electric insulating property. The pair of arm parts are electrically connected to a high frequency power source device respectively, and are conductive to electrode parts at the end in the respective pair of arm parts. The pair of arm parts are openable/closable. At least an inner side surface of one of the pair of arm parts has a guide mechanism of suction tool.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bipolar electric tweezers used for surgery and treatment such as otolaryngology, head and neck surgery, and neurosurgery.

In operations such as otolaryngology, head and neck surgery, and neurosurgery, it is extremely important to quickly stop bleeding in a relatively narrow cavity or lumen such as the middle ear, outer ear, nasal cavity, pharynx, and larynx. In particular, when performing fine surgery under an endoscope or a microscope, the surgical field (field of view of the surgical site) of the surgeon is narrowed, so that the surgical instrument occupies a large proportion (portion) in the surgical field. As a result, surgical instruments often interfere with the surgical field of the surgeon.

In addition, when blood vessels are cut during operation in the narrow surgical field described above and bleeding, the area covered by bleeding in the surgical field is large and the bleeding area also spreads rapidly, so the actual surgical field is narrowed and bleeding. It is difficult to observe and identify the tissue (bleeding site). The same problem occurs in bleeding in the narrow nasal cavity (nasal bleeding) and ear bleeding. In particular, during microscopic surgery under an endoscope or a microscope, it is necessary to secure the operative field of a surgeon and perform surgery under clear vision, and when bleeding, further secure the operative field and stop the bleeding quickly.

When stopping bleeding at a bleeding site, (1) blood (bleeding) is sucked, and (2) blood (bleeding) is coagulated. When power is applied to the bleeding site, even if power is applied to the tissue to which blood adheres, current does not flow in the tissue and blood cannot be stopped.
Further, if normal tissues other than the bleeding site are energized (coagulated), they will be killed and lead to tissue damage. Therefore, it is necessary to accurately energize (coagulate) the bleeding site under clear vision to stop the bleeding. Thus, in hemostasis, it is necessary to first (1) remove blood by suctioning blood (bleeding), and (2) accurately apply blood (bleeding) coagulation under clear vision.

At this time, since (1) suction and (2) coagulation are performed in a fine region such as in a narrow cavity or a lumen, the device used for suction and coagulation is compact in both functions of (1) suction and (2) coagulation. An integrated one is needed.

Since the surgeon holds forceps, an endoscope, etc. with one hand for securing the operative field and observing the operative field, the other hand holds (1) blood (bleeding) suction and (2) ) Blood (bleeding) must be coagulated. For example, in endoscopic surgery of the ear, nose, and pharynx, a narrow surgical field (for example, the cross-sectional area of the external auditory meatus such as the ear is about 1 cm 2) is used as an endoscope (diameter 2.3 mm-4 mm) for observation. It is necessary to insert a bar-polar electrode (tweezers type) and a suction tube for hemostasis to operate each.

Therefore, hemostasis is performed by repeating the procedure of holding the suction tube with the other hand and sucking blood, and then changing over to a bar polar electrode (tweezers type) and coagulating.
However, in the method of repeating suction and coagulation only with the other hand, when there is a large amount of bleeding, when the bleeding site is coagulated after suction, it is already covered with blood and cannot be seen. Since coagulation is repeated, it takes time, and there are problems such as too much bleeding to prevent coagulation. Further, even when hemostasis is performed when the amount of bleeding is small, repeating the suction and coagulation by holding the instrument with only the other hand is complicated in operation, requires time, and is a stress for the surgeon.

In order to solve this problem, a monopolar electrode coagulation device has been disclosed as a high-frequency coagulation device that integrates a suction function and a coagulation function.

WO2011/114902

Problems to be Solved by the Invention

However, in a monopolar device, the device is energized in the patient's body between the electrode plate placed on the back of the patient, so that the device may be destroyed by energizing it in patients with electromedical devices such as pacemakers or cochlear implants. It cannot be used because it exists.

An object of the present invention is to provide a bipolar electrocoagulation device capable of integrating a suction function and a coagulation function for hemostasis in endoscopic surgery such as otolaryngology, head and neck surgery, and neurosurgery and microscopic surgery under a microscope. Is.

Means for solving the problems

Bipolar electric tweezers according to the present invention have a pair of arms, each of the pair of arms has an electrode at a tip thereof, and each of the pair of arms has an electrically insulating base end. Of the pair of arms, each of the pair of arms is electrically connected to a high-frequency power supply device, and the electrode portion at the tip of each of the pair of arms can be energized. The part is openable and closable, and has a guide mechanism for the suction tool on the inner surface of at least one of the pair of arms.

Further, in the bipolar electric tweezers according to the present invention, the guide mechanism has an opening toward the center of the tweezers, and the inner surface of each of the pair of arms can be fixed by sandwiching the suction tool. It is characterized in that it is mounted at a position opposite to.

In the bipolar electric tweezers according to the present invention, the guide mechanism has a tubular shape having a cavity into which the suction tool is inserted, and a part of an outer peripheral surface of the guide mechanism corresponds to the pair of arm parts. It is characterized in that it is attached in contact with one of the inner parts.

In the bipolar electric tweezers according to the present invention, the guide mechanism has a tubular shape having a cavity into which the suction tool is inserted, and a part of an outer peripheral surface of the guide mechanism corresponds to the pair of arm parts. It is characterized in that it is mounted in contact with one inner side portion, and a cut portion is provided on the opposite side of a part of the outer peripheral surface along the axial direction of the cylindrical shape.

Further, in the bipolar electric tweezers according to the present invention, the guide mechanism mounted at a position facing the inner surface of each of the pair of arm portions comes into contact with the pair of arm portions, so that the distal end of each of the pair of arm portions is contacted. It is characterized in that the electrodes are prevented from coming into contact with each other.

Further, in the bipolar electric tweezers according to the present invention, the guide mechanism mounted in contact with one inner side portion of the pair of arm portions abuts on the other inner side portion of the pair of arm portions. ,
It is characterized in that the electrodes at the tips of the pair of arms are prevented from coming into contact with each other.

1 is a schematic view of a bipolar electric tweezers according to a first embodiment of the present invention. FIG. 3 is a plan view and a side view of the bipolar electric tweezers according to the first embodiment of the present invention. It is sectional drawing of the suction pipe guide part in the bipolar electric tweezers which concerns on 1st embodiment of this invention. FIG. 3 is a side view of the bipolar electric tweezers and the suction tube according to the first embodiment of the present invention. It is a figure explaining the fixing method of the suction tube in the bipolar electric tweezers which concerns on 1st embodiment of this invention. It is a figure explaining the formation method of the suction tube guide part in the bipolar electric tweezers which concerns on 1st embodiment of this invention. FIG. 3 is a side view of the bipolar electric tweezers according to the first embodiment of the present invention. It is sectional drawing explaining the other form of the suction tube guide part in the bipolar electric tweezers which concerns on 1st embodiment of this invention. FIG. 6 is a schematic view of a bipolar electric tweezers according to the second embodiment of the present invention. It is a top view and a side view of bipolar electric tweezers concerning a second embodiment of the present invention. It is sectional drawing of the suction pipe guide part in the bipolar electric tweezers which concerns on 2nd embodiment of this invention. It is sectional drawing explaining the other form of the suction tube guide part in the bipolar electric tweezers which concerns on 2nd embodiment of this invention.

Hereinafter, specific examples of the present invention will be described with reference to the drawings.

The bipolar electric tweezers according to the first embodiment will be described. FIG. 1 shows a schematic view of a bipolar electric tweezers according to the first embodiment. 2(1) and 2(2) respectively show a plan view and a side view of the bipolar electric tweezers according to the first embodiment.

The bipolar electric tweezers according to the present embodiment includes a pair of arm portions 101a and 101b, a connecting portion 102, connecting terminal portions 103a and 103b arranged in the connecting portion, electrode portions 104a and 104b at the tip of the arm portion, and suction. It has pipe guide parts 105a, 105b, 106a, 106b.

The arm portions 101a and 101b are curved near the center, and the length from the base ends 107a and 107b to the curved portions 108a and 108b (hereinafter, the lower arm portions 110a and 110b) is about 70 mm, from the curved portions 108a and 108b. The length of the arm tips 109a and 109b (hereinafter, upper arm portions 111a and 111b) is about 110 mm. Moreover, the length of the electrode portions 104a and 104b is about 5 mm.

The arm portions 101a and 101b and the electrode portions 104a and 104b are made of a conductive titanium alloy, and the surfaces other than the inner side surfaces of the electrode portions are coated with an insulating material.
The connecting portion 102 is made of an insulating synthetic resin, and fixes the base ends of the arms 101a and 101b at a predetermined interval on one surface of the connecting portion. As a result, the tips of the arm portions 101a and 101b are normally open, and the lower arm portions 110a and 110b are closed by bending.

The other surface of the connecting portion 102 has connection terminals 103a and 103b electrically connected to an external high frequency power source (not shown), and the terminals 103a and 103b are electrically connected to the titanium alloy of the arm portions 101a and 101b. doing. As a result, the electrodes 104a and 104b at the tips of the arm portions 101a and 101b are energized from the external power source through the terminals 103a and 103b.

The suction tube guide portions 105a and 105b, 106a and 106b are a pair respectively, and the inner surface of each of the upper arm portions 111a and 111b of the respective arm portions 101a and 101b is spaced at a predetermined interval, and the inner surface of each of the 105a and 105b, 106a and 106b. Are installed so that they face each other.

FIG. 3 is a sectional view taken along line AA′ in FIG. Each suction pipe guide portion 105a, 105b, 106a, 106b is curved in a C shape so as to have a concave portion toward the center side of the tweezers, and the suction pipe 112 to be inserted (shown by a dotted line in the figure) is opposed. The suction pipe guide portions 105a and 105b and 106a and 106b are fixed by being sandwiched by the inner peripheral surfaces thereof.

4(1) and 4(2) respectively show a top view and a side view when a suction tube 112 (shown by a solid line in the drawing) is fixed to bipolar electric tweezers (shown by a dotted line in the drawing).
The suction tube 112 is fixed by closing the arms and sandwiching the suction tube guide sections 105a and 105b and 106a and 106b with the inner peripheral surfaces thereof so that the tip section of the suction tube 112 is located at substantially the same position as the tip section of the bipolar electric tweezers.

Since the tip of the suction tube 112 and the tips of the electrode parts 104a, 104b of the bipolar electric tweezers can be fixed at substantially the same position, the bleeding part is immediately coagulated by the electrode parts 104a, 104b of the bipolar electric tweezers after the bleeding is sucked by the suction tube. Then you can stop the bleeding.

The suction pipe 112 shown by the solid line in FIG. 4 is made of resin, the suction pipe tip 113 has a diameter of about 2.6 mm, the suction pipe connecting portion 114 has a diameter of about 6 mm, and the suction pipe tip 113 has a diameter of suction. The diameter is smaller than the diameter of the pipe connecting portion 114.
Since the suction tube 112 is bent according to the curved portions 108a and 108b of the bipolar electric tweezers according to this embodiment, it can be easily grasped and fixed. The suction pipe connection portion 114 is connected to a suction pump (not shown) via a suction tube (not shown). The suction tube 112 is disposable (consumable) and does not energize

FIG. 5 shows a procedure for fixing the suction tube 112 in the bipolar electric tweezers according to this embodiment. First, the arms 101a and 101b of the bipolar electric tweezers are opened, and the suction tube 112 is inserted between the arms [FIG. 5(1)].

Next, the arm portions 101a and 101b of the bipolar electric tweezers are fixed by being sandwiched between the inner peripheral surfaces of the opposed suction pipe guide portions 105a and 105b and 106a and 106b. In this state, the suction tube tip portion 113 of the suction tube 112 can be brought close to the bleeding portion to suck the bleeding [FIG. 5(2)].

Finally, the respective arm portions 101a and 101b are further closed, the electrode portions 104a and 104b at the tips of the arm portions are brought close to each other, and a high-frequency voltage is applied to coagulate the blood at the bleeding site to stop the bleeding [FIG. )].

At this time, the suction pipe guide portions 105a and 105b, 106a and 106b, which face each other, are brought into contact with each other, so that the respective arm portions 101a and 101b cannot be brought closer to each other than in this contacted state. That is, since the electrode portions 104a and 104b cannot be brought closer than this state, it is possible to prevent both electrode portions 104a and 104b from directly contacting each other. As a result, it is possible to avoid a situation in which the electrode portions 104a and 104b come into contact with each other to cause a short circuit, and an electric current does not flow through the tissue to prevent coagulation and hemostasis.

When using tweezers that do not have a normal suction tube guide, hold the tweezers at a distance of several millimeters so that the electrodes do not contact each other (hold the tip of the tweezers type open for a few millimeters). This is a stress for the surgeon and it takes time to operate the tweezers. By using the bipolar electric tweezers according to the present embodiment, it is possible to easily hold the tweezers at intervals of several millimeters, so that the stress on the surgeon can be reduced and the tweezer operation time can be shortened.

Further, the tip of the arm portion of the bipolar electric tweezers according to the present embodiment is normally open and can be closed by bending the lower arm portions 110a and 110b. Therefore, the distance between the tip electrode portions 104a and 104b should be adjusted. Can adjust the range of electrocoagulation.

The suction tube guide portions 105a, 105b, 106a, 106b are attached to the arm portion by welding. Instead of welding, it may be attached using an adhesive.

Alternatively, the suction tube guides 105a, 105b, 106a, 106b can be formed on the arm by the following method.

FIG. 6 shows a method of forming the suction tube guide portion on the arm portion. FIG. 6(1) shows a developed view of the upper arm 111a of the arm 101a. The upper arm 111a is provided with projections 115a and 116a corresponding to the suction tube guides 105a and 106a, respectively. By bending or bending this protrusion toward the inside of the arm [FIG. 6(2)], the suction tube guides 105a and 106a are formed [FIG. 6(3)].

As shown in FIG. 7, in the bipolar electric tweezers according to the present embodiment, the angle 119 formed by the upper edges 117a and 117b of the curved portions 108a and 108b and the upper edges 118a and 118b of the upper arm portions 111a and 111b is 140 degrees. When using normal tweezers (angle 119=180 degrees) in operations in minute areas such as otolaryngology and neurosurgery, the arm of the tweezers in the surgical field on a straight line from the center of the visual field of the surgical field to the surgical site There has been a problem that it is difficult to bring the tip of the tweezers into the visual field because the portion occupied by the portions 101a and 101b is large. With the bipolar electric tweezers according to the present embodiment, since the curved portions 108a and 108b of the arms 101a and 101b have the angle 119 of 140 degrees, it is possible to easily bring the tip of the tweezers into the visual field without hindering the visual field. You can If the angle 119 is larger than 90 degrees and smaller than 180 degrees, it is effective to secure the visual field of the operative field.

Further, the smaller the thickness 121 (shown in FIG. 2) and the width 122 of the arm upper arm 111a, the more effective it is to secure the visual field of the operative field. On the other hand, if the thickness 121 (shown in FIG. 2) and the width 122 of the arm upper arm 111a are too small, the strength of the arm upper arm 111a decreases. The thickness 121 of the arm upper arm 111a is about 1.0 mm to 1.5 mm from the vicinity of the tip of the upper arm toward the curved portion of the arm. The width 122 of the arm upper arm 111a is about 1.0 mm to 4.0 mm from the vicinity of the tip of the upper arm toward the curved portion of the arm. Here, the thickness 121 and the width 122 are not limited to this, and it is sufficient that the visual field of the operative field can be secured and the strength of the arm can be maintained.

The bipolar electric tweezers according to the present embodiment can be used to grasp and operate a gauze used for hemostasis. This gauze has a thickness of about 5 mm and contains a hemostatic agent such as physiological saline or epinephrine. Therefore, by using the bipolar electric tweezers according to the present embodiment, blood can be sucked through the gauze while pressing the bleeding site with gauze to stop bleeding, and the bleeding site can be electrocoagulated under clear vision.

As described above, if the bipolar electric tweezers according to the present embodiment is used, one of the surgeon's hands operates an endoscope or the like, and the other hand operates one bipolar electric tweezers to electrocoagulate or blood. Since it is possible to apply pressure hemostasis by suction and gauze, the operability is dramatically improved, stress of the surgeon is reduced, and efficient endoscopic surgery becomes possible.

Furthermore, by using the bipolar electric tweezers according to the present embodiment, not only in endoscopic surgery but also in visual surgery, under microscopic surgery, while performing a procedure such as drill bone resection with one hand, the other By operating one bipolar electric tweezers by hand, electrocoagulation, blood suction, and compression hemostasis with gauze can be performed, which dramatically improves operability and reduces stress on the surgeon and enables efficient surgery. Is possible.

Further, by using the bipolar electric tweezers according to the present embodiment, it is possible to reduce the number of doctors required for the operation, and it is possible for one person to perform the operation which conventionally required two or more doctors.

In the bipolar electric tweezers according to the present embodiment, the suction tube guide portions 105a, 105b, 106a, 106b having a C-shaped curve are used as the guide mechanism of the suction tool, but as shown in FIG. A suction tube guide section having a polygonal cross section such as a letter may be used, and the suction tube having an opening toward the center of the tweezers and having a pair of suction tubes inserted between both arms of the tweezers. It suffices if it can be fixed by being sandwiched by the suction tube guide portions mounted at the positions facing the inner surfaces of the arms.

In the bipolar electric tweezers according to the present embodiment, two pairs of suction tube guide portions are used, but one pair or three or more pairs may be used as long as the suction tube guide portions can sandwich and fix the suction tube.

A bipolar electric tweezers according to the second embodiment will be described. FIG. 9 shows a schematic diagram of the bipolar electric tweezers according to the second embodiment. 10(1) and 10(2) respectively show a plan view and a side view of the bipolar electric tweezers according to the second embodiment.
The bipolar electric tweezers according to this embodiment has the suction tube guide portions 205a and 206a only on one arm portion 201a. The other points are similar to those of the first embodiment.

The bipolar electric tweezers according to the present embodiment includes a pair of arm portions 201a and 201b, a connecting portion 202 at the base end of the arm, connecting terminal portions 203a and 203b arranged at the connecting portion, and an electrode portion 204a at the tip of the arm portion. , 204b and suction pipe guide portions 205a and 206a.

The arm portions 201a and 201b are curved near the center, and the length from the base ends 207a and 207b to the curved portions 208a and 208b (hereinafter, lower arm portions 210a and 210b) is about 70 mm, from the curved portions 208a and 208b. The length of the tips 209a and 209b (hereinafter, upper arm portions 211a and 211b) is about 110 mm. The length of the electrode portions 104a and 104b is about 5 mm.

The suction tube guide parts 205a and 206a are attached to the inner surface of the upper arm part 211a of one arm part. FIG. 11 shows a sectional view of the suction tube guide portion 205a in the bipolar electric tweezers according to the present embodiment. Each of the suction pipe guide portions 205a and 206a has a cylindrical shape, and the suction pipe is inserted into the hollow portion of the cylinder. The suction guide portions 205a and 206a have an outer diameter of about 3.0 mm, an inner diameter of about 2.8 mm, and a length of about 2 mm.

When fixing the suction tube to the bipolar electric tweezers according to the present embodiment, if the inner diameters of the suction tube guide portions 205a and 206a are made slightly larger than the outer diameter of the tip of the suction tube, the outer diameter of the suction tube will be the tip. Since the thickness gradually increases from the end to the rear end, it can be fixed by inserting the suction tube into the suction tube guide portions 205a and 206a and pushing the suction tube.

Alternatively, the suction tube can be inserted into the suction tube guide portions 205a and 206a so that the surgeon can hold the tweezers and can hold and fix the suction tube with a finger.

In the bipolar electric tweezers according to the present embodiment, when the pair of arm portions 201a and 201b are closed, the suction tube guide portions 205a and 206a mounted on the inner side of one of the pair of arm portions 201a have the pair of arms. By abutting on the inner side of the other side 201b, the respective arm portions 201a, 201b cannot be brought closer to each other from this abutted state. That is, since the electrode portions 204a and 204b cannot be brought closer than this state, it is possible to prevent the electrode portions 204a and 204b from directly contacting each other. As a result, it is possible to avoid a situation in which the electrode portions 204a and 204b come into contact with each other to cause a short circuit, so that an electric current does not flow into the tissue and the coagulation is not stopped.

When using tweezers that do not have a normal suction tube guide, hold the tweezers at a distance of several millimeters so that the electrodes do not contact each other (hold the tip of the tweezers type open for a few millimeters). This is a stress for the surgeon and it takes time to operate the tweezers. By using the bipolar electric tweezers according to the present embodiment, it is possible to easily hold the tweezers at intervals of several millimeters, so that the stress on the surgeon can be reduced and the tweezer operation time can be shortened.

The suction tube guide portions 205a and 206a in the bipolar electric tweezers according to the present embodiment can be formed in the same manner as in the first embodiment.

In the bipolar electric tweezers according to the present embodiment, a cylindrical suction tube guide portion having a continuous outer peripheral portion is used as the guide mechanism of the suction tool, but as shown in FIG. 12(1), contact with the arm portion ( A structure may be provided in which a cut portion is provided along the axial direction of the cylindrical shape on the side opposite to the (mounting) surface.

Alternatively, as shown in FIG. 12(2), the shape may not be a cylindrical shape but may be a polygonal shape as long as it is a cylindrical shape and the suction pipe can be inserted into the cavity.

In the bipolar electric tweezers according to the present embodiment, the suction tube guide portions are provided at two locations, but it may be provided at one location or at three or more locations as long as the suction tube can be sandwiched and fixed by the suction tube guide portions.

Further, as a guide mechanism of the suction tool, a suction tool may be guided and fixed only to one arm portion by a rubber band-shaped or tape-shaped fixing tool using a stretchable material (resin, rubber, metal, etc.).

By using the bipolar electric tweezers according to the present embodiment, the same effect as that of the bipolar electric tweezers according to the first embodiment is obtained.

Although the suction device is used as the suction tool in the bipolar electric tweezers according to the present invention, suction may be performed using a resin tube or a metal flexible tube.

In the bipolar electric tweezers according to the present invention, the conductive titanium alloy is used for the arm portion and the electrode portion, but an alloy, metal or other conductive material may be used.

The bipolar electric tweezers according to the first embodiment and the second embodiment showed the nasal bipolar electric tweezers, but the bipolar electric tweezers according to the present invention is not limited to the nose for the ear, throat, head and neck, and It can be used for bipolar electric tweezers for other purposes such as neurosurgery. Therefore, the dimensions of the bipolar electric tweezers according to the present invention are not limited to the dimensions of the bipolar electric tweezers according to the first and second embodiments. For example, in the case of ear bipolar electric tweezers, the length of the lower arm is about 60 mm and the length of the upper arm is about 65 mm.

In the medical field, bipolar electric tweezers used for aspiration and coagulation of bleeding for hemostasis in operations such as otolaryngology, head and neck surgery, and neurosurgery, and can be industrially used as a medical device.

100, 200 Bipolar electric tweezers 101a, 101b, 201a, 201b Arms 102, 202 Connecting parts 103a, 103b, 203a, 203b Connection terminal parts 104a, 104b, 204a, 204b Electrode parts 105a, 105b, 106a, 106b, 205a, 206a Suction tube guide portions 107a, 107b, 207a, 207b Arm base ends 108a, 108b, 208a, 208b Arm curved portions 109a, 109b, 209a, 209b Arm tips 110a, 110b, 210a, 210b Arm lower arms 111a, 111b, 211a, 211b Arm upper arm 112 Suction tube 113 Suction tube tip 114 Suction tube connecting portions 115a, 116a Projection parts 121, 221 for forming a suction tube guide part Arm upper arm thickness 122, 222 Arm upper arm width

Claims (6)

Has a pair of arms,
An electrode portion is provided at each tip of the pair of arm portions,
Each of the pair of arms has a proximal end fixed to an electrically insulating connecting portion,
The connecting portion has a pair of connection terminals, and the pair of arm portions are electrically connected to the pair of connection terminals, respectively.
It is possible to energize the electrode portion at the tip of each of the pair of arm portions,
The pair of arms can be opened and closed,
A guide mechanism for a suction tool is provided on at least one inner surface of the pair of arms.
Bipolar electric tweezers. The guide mechanism has an opening toward the center of the tweezers,
It is mounted at a position facing the inner surface of each of the pair of arms so that the suction tool can be sandwiched and fixed.
The bipolar electric tweezers according to claim 1. The guide mechanism is a tubular shape having a cavity into which the suction tool is inserted,
The bipolar electric tweezers according to claim 1, wherein a part of an outer peripheral surface of the guide mechanism is attached in contact with one inner side part of the pair of arm parts. The guide mechanism is a tubular shape having a cavity into which the suction tool is inserted,
A part of the outer peripheral surface of the guide mechanism is attached in contact with one inner side part of the pair of arm parts,
A cut portion is provided along the axial direction of the cylindrical shape on the side opposite to a part of the outer peripheral surface,
The bipolar electric tweezers according to claim 1. By abutting the guide mechanism mounted at a position facing the inner surface of each of the pair of arms,
Preventing contact of the electrodes at the tips of the pair of arms,
The bipolar electric tweezers according to claim 2. By the guide mechanism mounted in contact with one inner side portion of the pair of arm portions to abut on the other inner side portion of the pair of arm portions,
Preventing contact of the electrodes at the tips of the pair of arms,
The bipolar electric tweezers according to claim 3.