WO2022033172A1

WO2022033172A1 - Folding-type electrode assembly and folding-type hemostatis instrument

Info

Publication number: WO2022033172A1
Application number: PCT/CN2021/100931
Authority: WO
Inventors: 冯曦; 敬兴义; 何朝东; 魏永刚; 赵金堂; 李波
Original assignee: 四川大学华西医院; 成都美创医疗科技股份有限公司
Priority date: 2020-08-14
Filing date: 2021-06-18
Publication date: 2022-02-17
Also published as: CN111839720A

Abstract

A folding-type electrode assembly (14) and a folding-type hemostasis instrument (10) relating to the field of medical instruments. The folding-type hemostasis instrument (10) comprises a handle (11), a support rod (12), a folding assembly (13) and the folding-type electrode assembly (14). The folding-type electrode assembly (14) comprises a fixed piece (140) and at least two electrodes (141). The electrodes (141) comprise a rotating part (142), a connecting part (144), and a folding part (143) connected in succession. A center line of the folding part (143) does not coincide with a center line of the rotating part (142). The rotating part (142) is penetratingly arranged on the fixed piece (140), such that the folding part (143) rotates around the center line of the rotating part (142), thereby achieving independent unfolding or folding of the electrodes (141). By means of causing the electrodes (141) to rotate on the fixed piece (140), achieving the unfolding or folding of multiple electrodes (141), the volume of the electrodes (141) is relatively small when folded, and said electrodes can be conveniently inserted into a part in need of hemostasis. The volume of the electrodes (141) is relatively large when unfolded, achieving hemostasis that covers a huge area and is greatly effective. Additionally, because the electrodes (141) rotate independently, multiple electrodes (141) are provided with different arrangement methods, and are suited for providing hemostasis to differently shaped parts, and the present invention is simple to operate, convenient, and very practical.

Description

A foldable electrode assembly and a foldable hemostatic device

technical field

The invention belongs to the field of medical devices, and in particular relates to a foldable electrode assembly and a foldable hemostatic device.

Background technique

At present, abdominal and thoracic surgery are usually "open", that is, the patient's abdominal cavity or thoracic cavity is incised, the diseased organs are exposed, and the operation is performed in an open state. This kind of open surgery causes great damage to the patient, and the patient has a long postoperative recovery period, obvious pain, and high hospitalization costs.

In the future, microscopic minimally invasive surgery must be the main trend in abdominal or thoracic surgery and other surgical procedures, such as microscopic hepatectomy.

The liver is densely covered with blood vessels and rich in blood; liver incision surgery requires very high hemostasis and requires the help of powerful and effective hemostasis instruments.

However, electrosurgical hemostatic instruments, such as electrosurgical knives, electrocoagulation forceps, ultrasonic knives, electrocoagulation forceps, etc., are often used in liver incision at present; these hemostatic instruments are usually used for surface hemostasis, and the hemostasis depth and hemostasis range are small. Hemostasis is less efficient when performing extensive incisions. Moreover, the above hemostatic instruments are bulky and cannot be passed through a trocar with a smaller diameter (5-15 mm in inner diameter) or an endoscope; they can only be used for open surgery, not for endoscopic surgery. Smaller hemostatic devices usually have weaker hemostatic ability and cannot meet the hemostasis requirements of dry resection. The lack of hemostatic devices that can be used for endoscopic procedures makes endoscopic liver resection difficult to achieve.

SUMMARY OF THE INVENTION

In view of this, the purpose of the embodiments of the present invention is to provide a foldable electrode assembly, which can realize the unfolding or folding of a plurality of electrodes by enabling the electrodes to rotate on the fixing member. (inner diameter 5-15mm) or endoscope, enter the part that needs hemostasis, the electrode is larger when unfolded, which can achieve ultra-large, powerful and effective hemostasis; and because the electrodes can be rotated independently, multiple electrodes have different arrangements , suitable for hemostasis of different shaped parts.

The purpose of the embodiments of the present invention is also to provide a foldable hemostasis device, including a foldable electrode assembly, which can not only be easily inserted into the site where hemostasis is required, but also can achieve ultra-large-scale, strong and effective hemostasis, and can also be arranged in different The electrode arrangement method can stop bleeding in different shapes, and the operation is simple, fast and practical.

Embodiments of the present invention are implemented as follows:

An embodiment of the present invention provides a foldable electrode assembly, the foldable electrode assembly includes a fixing member and at least two electrodes, the electrodes include a rotating part, a connecting part and a folded part connected in sequence, and the center of the folded part is The line does not coincide with the center line of the rotating part, the rotating part is penetrated through the fixing part, and the folding part is rotated around the center line of the rotating part, so as to realize the independent unfolding or folding of the electrodes.

As an optional solution of the above embodiment, the center line of the rotating portion and the center line of the folding portion are parallel.

As an optional solution of the above embodiment, the center line of the rotating part is parallel to the center line of the fixing part, and the rotating parts of the at least two electrodes are distributed around the center line of the fixing part.

As an optional solution of the above embodiment, the number of the electrodes is four, and the rotating parts of the four electrodes are distributed in a rectangular shape.

As an optional solution of the above embodiment, the electrode includes an inner tube and an outer tube, the inner tube is located inside the outer tube, the tail of the inner tube is provided with a water inlet, and the head communicates with the outer tube , the head of the outer tube is closed and the tail is provided with a water outlet, so that the inner tube and the outer tube form a cooling medium circulation channel.

As an optional solution of the above-mentioned embodiment, the tail portion of the outer tube is closed with the outer surface of the inner tube, and the number of the water outlets is multiple and uniformly distributed along the circumference of the outer tube.

As an optional solution of the above embodiment, the diameter of the head of the outer tube is gradually reduced to form a needle tip.

As an optional solution of the above-mentioned embodiment, the outer surface of the electrode is provided with a scale.

An embodiment of the present invention further provides a foldable hemostatic device, the foldable hemostatic device includes a handle, a support rod, a folding assembly and the above-mentioned foldable electrode assembly, the support rod is connected to the handle, and the electrode is fixed At one end of the support rod, the folding assembly is connected to the handle and is configured to drive the folding electrode assembly to fold or unfold.

As an optional solution of the above embodiment, the folding assembly includes a folding knob and a steel pipe, the folding knob is rotatably connected to the handle, and both ends of the steel pipe are respectively connected to the rotating part and the folding knob .

The beneficial effects of the present invention are:

The foldable hemostatic device provided by the present invention includes a handle, a support rod, a foldable assembly and a foldable electrode assembly. By enabling the electrodes to rotate on the fixing member, the unfolding or folding of multiple electrodes is realized, and the electrodes are small in size when folded. It is convenient to insert a trocar (inner diameter of 5-15mm) or an endoscope into the site where hemostasis is required. The electrode is larger in size when deployed, which can achieve ultra-large, strong and effective hemostasis; and because the electrodes can be rotated independently, multiple electrodes have Different arrangement methods are suitable for hemostasis of different shapes of parts, and the operation is simple, fast and practical.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. The same reference numerals refer to the same parts throughout the drawings. The drawings are not intentionally scaled to actual size, and the emphasis is on illustrating the gist of the present invention.

FIG. 1 shows a schematic structural diagram of a folded electrode assembly provided by the first embodiment of the present invention;

Fig. 2 shows the sectional view of Fig. 1;

Fig. 3 shows the schematic diagram of the cooperation relationship between the working pole and the loop pole;

Figure 4 shows a cross-sectional view of an electrode;

FIG. 5 shows a schematic diagram of a folded state from one of the viewing angles of FIG. 1;

FIG. 6 shows a schematic diagram of a folded state from another viewing angle of FIG. 1;

FIG. 7 shows a schematic diagram of one of the unfolded modes of the electrode;

FIG. 8 shows another schematic diagram of the development of the electrode;

Fig. 9 shows the schematic diagram of the unfolded state of Fig. 8;

Fig. 10 shows a schematic structural diagram of a foldable hemostatic device provided by the second embodiment of the present invention;

Figure 11 shows the cross-sectional view of Figure 10;

Figure 12 shows a schematic diagram of the structure of the steel pipe;

Figure 13 shows a hierarchy diagram of a transmission element;

Fig. 14 shows a schematic diagram of the cooperation relationship between the steel pipe and the foldable electrode assembly;

Figure 15 shows a schematic diagram of the cooperation relationship between the transmission element and the foldable electrode assembly;

Figure 16 shows a schematic diagram of the first working state of the foldable hemostatic device;

Figure 17 shows a schematic diagram of the second working state of the foldable hemostatic device;

Figure 18 shows a schematic diagram of the effect after multiple ablation in a linear arrangement;

Figure 19 shows a schematic diagram of the third working state of the foldable hemostatic device;

Figure 20 shows a schematic diagram of the effect of arc-shaped arrangement after multiple ablation.

icon:

10-foldable hemostatic device;

11-handle; 12-support rod; 13-foldable assembly; 14-foldable electrode assembly;

130-folding knob; 131-steel pipe; 132-rigid part; 133-flexible part; 134-transmission part; 135-flexible insulating layer; 136-insulating hose; 140-fixing part; 141-electrode; 143-folding part; 144-connecting part; 145-inner pipe; 146-outer pipe; 147-water inlet; 148-water outlet.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.

first embodiment

Referring to FIG. 1 , the first embodiment of the present invention provides a foldable electrode assembly 14 , and the foldable electrode assembly 14 can play a role of hemostasis.

The foldable electrode assembly 14 includes a fixing member 140 and at least two electrodes 141 . In this embodiment, the number of electrodes 141 is four.

The fixing member 140 may adopt a block structure. In this embodiment, the fixing member 140 is cylindrical, and the fixing member 140 is provided with a plurality of installation through holes (please refer to FIG. Choose four in quantity).

Of course, the fixing member 140 may also adopt a regular shape such as a prism or other irregular shapes.

In this embodiment, the center line of the mounting through hole may be parallel to the center line of the fixing member 140, and the four mounting through holes are evenly distributed around the center line of the fixing member 140. Of course, in other embodiments, the The center line and the center line of the fixing member 140 may also be out of plane or intersected.

In one embodiment, the plurality of electrodes 141 are all unipolar electrodes, that is, each electrode is a working electrode. In this case, in actual operation, a negative electrode plate needs to be matched. The number of electrodes 141 can also be selected from two, three, five, etc. After repeated experiments by researchers, it is known that due to the limitations of the surgical operation under the microscope, when the number of electrodes 141 is four, the efficiency is high and the hemostatic effect is good.

In this embodiment, the electrodes 141 are connected to the fixing member 140 , and the four electrodes 141 are distributed in a rectangular shape, that is, the mounting through holes are distributed in a rectangular shape around the center line of the fixing member 140 .

Referring to FIG. 3, in another preferred embodiment, the electrode 141 is divided into a working electrode and a return electrode. In this way, one working electrode and one return electrode are a group of electrodes 141, and the electrode 141 is at least There is one group set, and the commonly used groups are 1 group, 2 groups or 3 groups. According to the diameter of the endoscope, choose whether to set it as a bending structure, that is, when the number of electrodes 141 is one group, it is usually not necessary to set the electrode 141 as a bending structure, only when the applicable trocar (inner diameter 5-15mm) or When the diameter of the endoscope is small, the electrode 141 with a bent structure needs to be used. When each electrode 141 is arranged in a row, the distal distance between the working electrode and the return electrode of the same group is 5-12 mm, the diameter of each electrode 141 is 1-3 mm, and each electrode 141 exposes the fixing member 140 or the first folding arm The length is 3-10cm. The "distal end" here refers to the end that is closer to the site of action during endoscopic surgery.

When multiple groups of electrodes 141 are provided, the working electrodes and the return electrodes are alternately distributed, and the electrodes 141 are insulated from each other.

The alternating distribution of the working electrodes and the return electrodes can make the coagulation areas generated between the electrodes 141 connected to each other, thereby generating a larger coagulation area.

Of course, in another degraded embodiment, the manner of "working pole-return pole-return pole-working pole" or "return pole-working pole-working pole-return pole" can also be used. The coagulation areas produced in this way were disconnected, and no better coagulation areas were formed between the different groups.

Under the action of the radio frequency host, the on-off of the high-frequency current is controlled by the foot controller or manually, and the high-frequency current flows between the working pole and the loop pole. Because the tissue has a certain impedance, heat will be generated when the high-frequency current flows through the tissue, and the heat will cause the tissue helicin to shrink and dehydrate, and the blood vessels will be closed, thereby achieving the function of hemostasis. During hemostasis, the electrode 141 itself does not generate heat, and the heat for hemostasis comes from the heat generated by "ohmic heating" when current flows through the tissue.

Wherein, as shown in FIG. 2 and FIG. 3 , the electrode 141 includes a rotating part 142 , a connecting part 144 and a folding part 143 which are connected in sequence.

The rotating part 142 is inserted through the installation through hole of the fixing block, and the rotating part 142 can rotate around its own center line. It should be noted that the rotating part 142 can only rotate and cannot slide along its own centerline.

The folding part 143 is connected to the rotating part 142 through the connecting part 144 . During the rotation of the rotating part 142 , the folding part 143 can be driven to rotate around the center line of the rotating part 142 . When the electrodes 141 are arranged in a row, the distance between the distal ends of the folded portions 143 of the same group of working electrodes and return electrodes is 5-12 mm.

The center line of the folding part 143 and the center line of the rotating part 142 do not overlap, and the center line of the folding part 143 and the center line of the rotating part 142 may be different planes, intersect, etc. In this embodiment, the center line of the folding part 143 It is parallel to the center line of the rotating part 142 .

The connecting portion 144 is used to connect the rotating portion 142 and the folding portion 143 .

The shape of the connecting portion 144 is not limited, for example, the connecting portion 144 adopts a curved structure, a straight structure, etc. In this embodiment, the connecting portion 144 adopts a straight structure.

The included angle between the center line of the connecting portion 144 and the center line of the rotating portion 142 and the included angle between the center line of the connecting portion 144 and the center line of the folding portion 143 are not limited. For example, the connecting part 144 is perpendicular to the rotating part 142 and the folding part 143 respectively, the angle between the center line of the connecting part 144 and the center line of the rotating part 142 and the center line of the connecting part 144 and the center line of the folding part 143 The included angle is an obtuse angle, etc.

In this embodiment, the included angle between the center line of the connecting portion 144 and the center line of the rotating portion 142 is an obtuse angle, and the included angle between the center line of the connecting portion 144 and the center line of the folding portion 143 is an obtuse angle, and the obtuse angle is an obtuse angle. The angle range can be controlled between 120°-150°, such as 120°, 135°, 150°, etc.

Such an angle range prevents different electrodes 141 from interfering with each other when they are rotated individually, so that the electrodes 141 can rotate 360° around the center line of the rotating part 142 .

When the electrodes 141 rotate around the center line of the rotating part 142, the electrodes 141 can be independently unfolded or folded, and the rotations of different electrodes 141 do not interfere with each other. and the angle of rotation are not affected.

It should be noted that the unfolding or folding of the electrode 141 means that the distance between the center line of the folded portion 143 and the center line of the fixing member 140 increases or decreases with the rotation of the electrode 141 . The limit state of electrode 141 unfolding is that the distance between the center line of the folded part 143 and the center line of the fixed block is the largest, and the limit state of electrode 141 folding is that the distance between the center line of the folded part 143 and the center line of the fixed block is the smallest.

There is a smooth transition between the connecting portion 144 and the rotating portion 142 and between the connecting portion 144 and the folding portion 143 .

In addition, in order to facilitate the operation under the microscope as much as possible, it needs to be controlled that the four electrodes 141 do not exceed the diameter range of the fixing member 140 in the folded state.

The whole of the electrode 141 is curved, and the interior is hollow. Specifically, as shown in FIG. 4 , the electrode 141 includes an inner tube 145 and an outer tube 146 .

Both the inner tube 145 and the outer tube 146 may be made of metal materials, and the inner tube 145 and the outer tube 146 are assembled with a single electrode 141, then welded and fixed, and finally bent.

The inner tube 145 is located inside the outer tube 146 , wherein there is a certain distance between the head of the inner tube 145 and the head of the outer tube 146 , and the outer surface of the inner tube 145 has a second space between the inner surface of the outer tube 146 . gap.

The tail of the inner tube 145 is provided with a water inlet 147 and the head communicates with the outer tube 146 .

It should be noted that: the head and tail of the outer tube 146 and the inner tube 145 are relative, and the tail refers to the end of the electrode 141 close to the handle 11, that is, the end away from the coagulation area during operation; the head refers to the electrode 141 The end away from the handle 11, that is, the end inserted into the coagulation area during operation. Referring to the orientation in FIG. 4 , the left side is the tail of the outer tube 146 and the inner tube 145 , and the right side is the head of the outer tube 146 and the inner tube 145 .

The tail of the outer tube 146 and the outer surface of the inner tube 145 are closed, and the sealing method is not limited.

The number of the water outlets 148 is multiple and uniformly distributed along the circumferential direction of the outer pipe 146 .

The flow of the cooling liquid inside the electrode 141: the cooling liquid enters the inner tube 145 from the tail of the inner tube 145, flows out from the head of the inner tube 145 and enters the head of the outer tube 146, then enters the tail of the outer tube 146, and finally It flows along the second gap between the inner tube 145 and the outer tube 146 and flows out from the water outlet 148 .

The current density around the electrode 141 is much larger than that in the distance, which leads to the tissue around the electrode 141 being more prone to dehydration and drying. It is impossible to stop the bleeding of distant tissues, and the scope of hemostasis is greatly reduced.

And each electrode 141 of the hemostatic device has an internal liquid circulation function; when the water inlet pipe is connected to a cooling liquid (but not limited to physiological saline), the water outlet 148 is communicated with the suction device, and the cooling liquid can flow through the entire electrode at this time. 141, so as to take away the heat of the electrode 141; the temperature of the electrode 141 will not be too high (keep at about 25 ℃), so the tissue around the electrode 141 will not dry out prematurely, and it is not easy to appear "sticking knife phenomenon", At this time, the current can be transmitted, causing the distant tissue to generate heat, dehydrate, and stop bleeding.

In addition, in other embodiments, the water outlet 148 may also be arranged at other positions, for example, the water outlet 148 may be arranged in the middle of the rotating part 142 or the connecting part 144 or the intersection of the folding part 143 and the connecting part 144 . But at this time, it is not convenient for the water outlet 148 to communicate with the suction equipment, and the cooling liquid can only flow out from the water outlet 148 to act on the part to be treated, and a suction equipment must be used to suck the waste water out of the body.

In order to facilitate the insertion of the electrode 141 into the tissue, the diameter of the head of the outer tube 146 is gradually reduced to form a needle tip.

In addition, a scale can also be provided on the outer surface of the electrode 141, and the scale can enable the staff to know the depth of the electrode 141 inserted into the tissue.

Referring to FIG. 5 , this embodiment uses four electrodes 141 . After the electrodes 141 are completely folded, the folded portions 143 of the four electrodes 141 are gathered together, and the distance from the center line of the fixing member 140 is relatively close, and the four electrodes 141 are not beyond the diameter of the first folding arm.

Referring to FIGS. 6-9 , with the rotation of the electrodes 141 , the folded portions 143 of the four electrodes 141 can be arranged in various ways, such as a straight line, a circular arc, a rectangle, and the like.

Second Embodiment

Referring to FIG. 10 , the second embodiment of the present invention further provides a foldable hemostatic device 10 . The foldable hemostatic device 10 includes a handle 11 , a support rod 12 , a foldable assembly 13 and the foldable electrode in the first embodiment. Component 14.

First of all, as the basis of the whole structure, the handle 11 mainly plays the role of supporting the support rod 12, the folding assembly 13, etc., and is convenient for the staff to operate by hand.

The style of the handle 11 is not limited. In this embodiment, the handle 11 can adopt but is not limited to the following structures:

The handle 11 has a mounting portion and a hand-holding portion, the interior of the mounting portion is hollow for accommodating part of the component structure, and the hand-holding portion is used for the staff to hold.

Secondly, as the main body of the foldable hemostatic device 10 , the support rod 12 mainly serves to connect the handle 11 and the foldable electrode assembly 14 , and can drive the electrode 141 to reach the designated coagulation area.

The material and type of the support rod 12 are not limited. In this embodiment, the support rod 12 adopts a circular tubular structure, and the interior of the support rod 12 is hollow so that other components can be installed therein.

Of course, in other embodiments, the support rod 12 may also adopt a solid structure, and the shape is not limited to a cylindrical shape.

The support rod 12 is connected to the handle 11 , and the end of the support rod 12 can be inserted into the handle 11 .

The fixing member 140 can close the end of the support rod 12 , and the installation through hole communicates with the inside of the support rod 12 .

In this embodiment, the center line of the mounting through hole may be parallel to the center line of the support rod 12 .

Then, the rotation of the electrode 141 is realized by the folding assembly 13, and the folding assembly 13 is used to drive the electrode 141 of the electrode 141 assembly to rotate, so as to fold or unfold the electrode 141 assembly.

The folding assembly 13 can adopt but is not limited to the following structures:

Referring to FIG. 11 , the folding assembly 13 includes a folding knob 130 and a transmission member 134 , wherein the transmission member 134 includes a steel pipe 131 .

The folding knob 130 is rotatably connected to the handle 11 , one end of the steel pipe 131 is connected to the rotating part 142 and the other end is connected to the folding knob 130 . When the folding knob 130 is rotated, the electrode 141 can be driven to rotate through the steel pipe 131 .

Because the diameter of the support rod 12 is small, and the steel pipes 131 are located inside the support rod 12, the number of steel pipes 131 is large, resulting in a small distance between the steel pipes 131, which is not easy to control. In order to improve this problem, in this embodiment 12 , the steel pipe 131 includes a rigid portion 132 and a flexible portion 133 .

The rigid portion 132 cannot be deformed, the flexible portion 133 is adjacent to the folding knob 130 , and the flexible portion 133 can bend and transmit torque. The flexible portion 133 is located outside the support rod 12 , and the flexible portion enables the distance between the transmission members 134 to be increased as required to prevent mutual interference.

The steel pipe 131 is a circular metal pipe, and the flexible portion 133 is made into a spiral shape by means of helical cutting.

Of course, in other embodiments, the flexible portion 133 may also adopt other structures.

In addition, as shown in FIG. 13 , the transmission member 134 further includes a flexible insulating layer 135 and an insulating hose 136 .

The flexible insulating layer 135 covers the outer surface of the steel pipe 131, the insulating hose 136 is located inside the steel pipe 131, and there is a first gap between the outer surface of the insulating hose 136 and the inner surface of the steel pipe 131, when the water outlet 148 is arranged on the outer pipe At the end of 146, the flexible insulating layer 135 and the insulating hose 136 enclose an auxiliary cooling medium circulation channel.

The tail of the inner tube 145 is communicated with the insulating hose 136, and the first gap and the second gap are communicated through the water outlet 148, that is, the cooling medium circulation channel and the auxiliary cooling medium circulation channel are communicated to form a complete cooling medium circulation channel.

Please refer to FIG. 14 for the matching relationship between the steel pipe 131 and the foldable electrode assembly 14 (the flexible portion 133 in FIG. 14 may be present or not), and the matching relationship between the transmission member 134 and the foldable electrode assembly 14 is shown in FIG. 15 . . The tail of the steel pipe 131 is electrically connected to the host through a welded and sealed cable.

Please refer to FIGS. 16-20 for the working state of the foldable hemostatic device 10 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

A foldable electrode assembly, characterized in that the foldable electrode assembly (14) comprises a fixing member (140) and at least two electrodes (141), the electrodes (141) comprising rotating parts (142) connected in sequence , a connecting part (144) and a folding part (143), the center line of the folding part (143) does not coincide with the center line of the rotating part (142), and the rotating part (142) passes through the fixed part The component (140) is used to rotate the folding part (143) around the center line of the rotating part (142), so as to realize the independent unfolding or folding of the electrode (141).
The foldable electrode assembly according to claim 1, wherein the center line of the rotating part (142) and the center line of the folding part (143) are parallel.
The foldable electrode assembly according to claim 1, wherein the center line of the rotating part (142) is parallel to the center line of the fixing member (140), and the rotation of the at least two electrodes (141) The portions (142) are distributed around the centerline of the fixing member (140).
The foldable electrode assembly according to claim 3, wherein the number of the electrodes (141) is four, and the rotating parts (142) of the four electrodes (141) are distributed in a rectangular shape.
The foldable electrode assembly according to claim 1, wherein the electrode (141) comprises an inner tube (145) and an outer tube (146), and the inner tube (145) is located in the outer tube (146) Inside, the tail of the inner pipe (145) is provided with a water inlet (147) and the head is communicated with the outer pipe (146), the head of the outer pipe (146) is closed and the tail is provided with a water outlet ( 148), so that the inner tube (145) and the outer tube (146) constitute a cooling medium circulation channel.
The foldable electrode assembly according to claim 5, wherein the tail of the outer tube (146) is closed with the outer surface of the inner tube (145), and the number of the water outlets (148) is multiple and evenly distributed along the circumferential direction of the outer tube (146).
The foldable electrode assembly according to claim 5, wherein the diameter of the head of the outer tube (146) is gradually reduced to form a needle tip.
The foldable electrode assembly according to claim 1, wherein a scale is provided on the outer surface of the electrode (141).
A foldable hemostatic device, characterized in that the foldable hemostatic device (10) comprises a handle (11), a support rod (12), a folding assembly (13) and the folding device according to any one of claims 1-8 type electrode assembly (14), the support rod (12) is connected to the handle (11), the electrode (141) is fixed to one end of the support rod (12), and the folding assembly (13) is connected to The handle (11) is configured to drive the foldable electrode assembly (14) to fold or unfold.
The folding hemostatic device according to claim 9, wherein the folding assembly (13) comprises a folding knob (130) and a steel pipe (131), and the folding knob (130) is rotatably connected to the handle (11), both ends of the steel pipe (131) are respectively connected to the rotating part (142) and the folding knob (130).