CN212438828U - Foldable electrode subassembly and foldable hemostasis apparatus - Google Patents

Abstract

The utility model relates to a foldable electrode subassembly and foldable hemostatic device belongs to the medical instrument field. The foldable hemostatic instrument comprises a handle, a support rod, a folding assembly and a foldable electrode assembly, wherein the foldable electrode assembly comprises a fixing piece and at least two electrodes, the electrodes comprise a rotating part, a connecting part and a folding part which are sequentially connected, the central line of the folding part is not overlapped with the central line of the rotating part, the rotating part is arranged in the fixing piece in a penetrating mode, and the folding part rotates around the central line of the rotating part to realize independent unfolding or folding of the electrodes. The electrodes can rotate on the fixing piece, so that the plurality of electrodes can be unfolded or folded, the electrodes are small in size when folded, and can be conveniently inserted into a part needing hemostasis, the electrodes are large in size when unfolded, and the ultrahigh-range powerful effective hemostasis can be realized; and because the electrode can independently rotate, a plurality of electrodes have different arrangement modes, are applicable to stanching to the position of different shapes, and easy and simple to handle, swift, the practicality is strong.

Description

Foldable electrode subassembly and foldable hemostasis apparatus

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to foldable electrode subassembly and foldable hemostasis apparatus.

Background

At present, abdominal cavity and thoracic cavity surgery is usually performed in an open mode, that is, the abdominal cavity or the thoracic cavity of a patient is cut, diseased organs are exposed, and the surgery is performed in an open state. The open type operation has great damage to patients, long postoperative recovery period of the patients, obvious pain and high hospitalization cost.

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

The blood vessels of the liver are dense and rich in blood; liver resection has high hemostatic requirements and requires powerful and effective hemostatic instruments.

However, at present, an electrosurgical hemostatic instrument such as an electric knife, an electric coagulation forceps, an ultrasonic knife, an electric coagulation forceps and the like is frequently used in the liver resection operation; these hemostatic devices are typically used for surface hemostasis, with a small depth and range of hemostasis, and are inefficient in performing wide range cutting procedures. Moreover, the above hemostatic instruments are bulky and cannot pass through a puncture outfit (inner diameter 5-15mm) or an endoscope with a small caliber; they are only used for open surgery and are not suitable for under-the-mirror surgery. And the hemostatic instruments with smaller volume generally have weaker hemostatic ability and cannot meet the hemostatic requirement of dry resection surgery. The lack of hemostatic instruments that can be used for an endoscopic procedure makes an endoscopic liver resection difficult to achieve.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the embodiments of the present invention is to provide a foldable electrode assembly, which can realize the expansion or folding of a plurality of electrodes by enabling the electrodes to rotate on a fixing member, wherein the volume of the electrode assembly is small when the electrode assembly is folded, the electrode assembly can be conveniently inserted into a puncture outfit (with an inner diameter of 5-15mm) or an endoscope to enter a portion to be hemostatic, and the volume of the electrode assembly is large when the electrode assembly is expanded, so as to realize the powerful and effective hemostasis; and because the electrodes can independently rotate, the plurality of electrodes have different arrangement modes, and the hemostatic bag is suitable for hemostasis of parts with different shapes.

The utility model provides a still aim at provides a foldable hemostasis apparatus contains foldable electrode subassembly, can enough conveniently insert to the position that needs stanch, can realize super large scope, powerful effectual hemostasis again, can also arrange out different electrode mode of arranging to stanch to the position of different shapes, easy and simple to handle, swift, the practicality is strong.

The embodiment of the utility model is realized like this:

an embodiment of the utility model provides a foldable electrode subassembly, foldable electrode subassembly includes mounting and two piece at least electrodes, the electrode is including the rotation portion, connecting portion and the folding portion that connect gradually, the central line of folding portion with the central line of rotation portion does not coincide, the rotation portion is worn to locate the mounting makes the folding portion centers on the central line of rotation portion is rotatory, in order to realize independently the expansion or the folding of electrode.

As an alternative to the above embodiment, the centre line of the turning part and the centre line of the folded part are parallel.

As an alternative to the above embodiment, the centre line of the rotating part is parallel to the centre line of the fixture, and the rotating parts of the at least two electrodes are distributed around the centre line of the fixture.

As an alternative to the above embodiment, the number of the electrodes is four, and the rotating portions of the four electrodes are distributed in a rectangular shape.

As an alternative to 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, the head of the inner tube is communicated with the outer tube, the head of the outer tube is closed, and the tail of the outer tube is provided with a water outlet, so that the inner tube and the outer tube constitute a cooling medium circulation channel.

As an alternative to the above embodiment, the tail portion of the outer tube is closed to the outer surface of the inner tube, and the number of the water outlets is plural and is uniformly distributed along the circumferential direction of the outer tube.

As an alternative to the above embodiment, the head of the outer tube is tapered to a pointed shape.

As an alternative to the above embodiment, the outer surface of the electrode is provided with a scale.

An embodiment of the present invention further provides a foldable hemostatic device, which includes a handle, a support rod, a foldable assembly and the foldable electrode assembly, wherein the support rod is connected to the handle, the electrode is fixed to one end of the support rod, the foldable assembly is connected to the handle and is configured to drive the foldable electrode assembly to be folded or unfolded.

As an alternative to the above embodiment, the folding assembly includes a folding knob rotatably connected to the handle, and a steel tube having both ends connected to the rotating portion and the folding knob, respectively.

The utility model has the advantages that:

the utility model provides a folding hemostasis instrument, which comprises a handle, a support rod, a folding component and a folding electrode component, wherein the electrodes can rotate on a fixing component to realize the expansion or folding of a plurality of electrodes, the volume of the electrodes is small when folded, a puncture outfit (with the inner diameter of 5-15mm) or an endoscope can be conveniently inserted into the electrodes to enter the position needing hemostasis, and the volume of the electrodes is large when unfolded, so that the super-large range and powerful effective hemostasis can be realized; and because the electrode can independently rotate, a plurality of electrodes have different arrangement modes, are applicable to stanching to the position of different shapes, and easy and simple to handle, swift, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic view illustrating a structure of a foldable electrode assembly according to a first embodiment of the present invention;

FIG. 2 shows a cross-sectional view of FIG. 1;

FIG. 3 is a schematic diagram showing the mating relationship of the working and return poles;

FIG. 4 shows a cross-sectional view of an electrode;

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

FIG. 6 shows a schematic view of FIG. 1 from another perspective in a folded state;

FIG. 7 is a schematic view of one of the deployment modes of the electrode;

FIG. 8 is a schematic view showing another way of deploying the electrodes;

FIG. 9 shows the expanded state diagram of FIG. 8;

fig. 10 is a schematic view illustrating a foldable hemostatic device according to a second embodiment of the present invention;

FIG. 11 shows a cross-sectional view of FIG. 10;

FIG. 12 shows a schematic structural view of a steel pipe;

FIG. 13 shows a hierarchy of transmission parts;

FIG. 14 is a schematic view showing the fitting relationship of a steel tube to a folded electrode assembly;

FIG. 15 is a schematic view showing the mating relationship of the transmission member to the foldable electrode assembly;

fig. 16 shows a schematic view of a first state of operation of the folding hemostatic device;

fig. 17 illustrates a second operational state diagram of the folding hemostatic device;

FIG. 18 shows a schematic of the effect of multiple ablations in a linear array;

fig. 19 illustrates a third operational state schematic of the folding hemostatic device;

fig. 20 shows a schematic of the effect of the arc arrangement after multiple ablations.

Icon:

10-a folding hemostatic device;

11-a handle; 12-a support bar; 13-a folding assembly; 14-a folded electrode assembly;

130-folding knob; 131-a steel pipe; 132-a rigid portion; 133-a flexible portion; 134-a transmission; 135-a flexible insulating layer; 136-an insulating hose; 140-a fixture; 141-an electrode; 142-a rotating part; 143-a fold; 144-a connecting portion; 145-inner tube; 146-an outer tube; 147-a water inlet; 148-water outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

First embodiment

Referring to fig. 1, a first embodiment of the present invention provides a foldable electrode assembly 14, wherein the foldable electrode assembly 14 can stop bleeding.

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

The fixing element 140 may be a block structure, in this embodiment, the fixing element 140 is a cylinder, and a plurality of mounting through holes are formed in the fixing element 140 (please refer to fig. 2, in this embodiment, the number of the mounting through holes is four).

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

In this embodiment, the center line of the installation through hole may be parallel to the center line of the fixing member 140, and the four installation through holes are uniformly distributed around the center line of the fixing member 140.

In one embodiment, the plurality of electrodes 141 are all unipolar electrodes, i.e., each electrode is a working electrode, and in this case, a negative plate is required for practical operation. The number of the electrodes 141 can be two, three, five or the like, and repeated experiments of researchers prove that the electrode is limited by the limitation of operation under the microscope, and when the number of the electrodes 141 is four, the efficiency is high, and the hemostatic effect is good.

In the 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 electrodes 141 are divided into working electrodes and return electrodes, in this way, one working electrode and one return electrode form one group of electrodes 141, and at least one group of electrodes 141 is provided, and the number of the groups is 1 group, 2 groups or 3 groups. When the bending structure is selected according to the caliber size of the endoscope, i.e. the number of the electrode 141 is 1, the electrode 141 is not required to be provided with the bending structure in general, and the electrode 141 with the bending structure is only required when the applicable puncture outfit (the inner diameter is 5-15mm) or the endoscope has a small caliber. When the electrodes 141 are arranged in a row, the distance between the working electrode and the return electrode in the same group is 5-12mm, the diameter of each electrode 141 is 1-3mm, and the length of each electrode 141 exposed out of the fixing member 140 or the first folding arm is 3-10 cm. As used herein, "distal" refers to the end closer to the site of action during an endoscopic procedure.

When a plurality of sets of electrodes 141 are provided, the working electrodes and the return electrodes are alternately arranged, and the electrodes 141 are insulated from each other.

The alternating arrangement of the working and return electrodes allows the coagulation zones created between the electrodes 141 to be interconnected to create a larger coagulation zone.

Of course, in an alternative embodiment, the "working electrode/return electrode/working electrode" or "return electrode/working electrode/return electrode" can also be used. The coagulation zones generated in this way are disconnected and no better coagulation zones are formed between the different groups.

Under the action of the radio frequency host, the on-off of high-frequency current is controlled by a foot controller or manually, and the high-frequency current flows between the working pole and the loop pole. Because the tissue has certain impedance, the high-frequency current can generate heat when flowing through the tissue, and the heat can cause the tissue spiral protein to shrink and dehydrate, so that the blood vessel is closed, thereby realizing the function of hemostasis. The electrode 141 itself does not heat up during hemostasis, which results from the heat generated by "ohmic heating" of the current flowing through the tissue.

As shown in fig. 2 and fig. 3, the electrode 141 includes a rotating portion 142, a connecting portion 144, and a folding portion 143 connected in sequence.

The rotating portion 142 penetrates through the mounting through hole of the fixing block, and the rotating portion 142 can rotate around the center line of the rotating portion. It should be noted that the rotating portion 142 can only rotate and cannot slide along its center line.

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

The center line of the folded portion 143 does not coincide with the center line of the rotating portion 142, and the center line of the folded portion 143 and the center line of the rotating portion 142 may be different from each other, intersect with each other, and the like.

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 has a curved structure, a linear structure, and the like, and in the present embodiment, the connecting portion 144 has a linear structure.

The angle between the center line of the connecting portion 144 and the center line of the rotating portion 142 and the 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 portion 144 is perpendicular to the rotating portion 142 and the folding portion 143, and the angle between the center line of the connecting portion 144 and the center line of the rotating portion 142 and the angle between the center line of the connecting portion 144 and the center line of the folding portion 143 are obtuse angles.

In the present embodiment, the 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 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 angle range of the obtuse angle can be controlled between 120 ° and 150 °, such as 120 °, 135 °, 150 °, and the like.

Such an angular range allows the different electrodes 141 to be independently rotated without interference with each other, so that the electrodes 141 can be rotated 360 ° around the center line of the rotating part 142.

When the electrodes 141 rotate around the central line of the rotating part 142, the electrodes 141 can be unfolded or folded independently, and the rotation of different electrodes 141 does not interfere with each other, i.e., when one of the electrodes 141 rotates, whether the other electrodes 141 rotate, and the rotation direction and the rotation angle are not affected.

The points to be explained are: 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 as the electrode 141 rotates. The electrode 141 is unfolded in a limit state in which the distance between the center line of the folded portion 143 and the center line of the fixed block is the largest, and the electrode 141 is folded in a limit state in which the distance between the center line of the folded portion 143 and the center line of the fixed block is the smallest.

The connecting portion 144 and the rotating portion 142 and the connecting portion 144 and the folding portion 143 are smoothly transited.

In addition, in order to facilitate the operation under the mirror as much as possible, the four electrodes 141 are controlled in the folded state not to exceed the diameter range of the fixing member 140.

The electrode 141 is bent as a whole and has a hollow interior, and specifically, as shown in fig. 4, the electrode 141 includes an inner tube 145 and an outer tube 146.

The inner tube 145 and the outer tube 146 may be made of a metal material, and the single electrode 141 is formed by assembling the inner tube 145 and the outer tube 146, welding the inner tube 145 and the outer tube to each other, and bending the inner tube and the outer tube.

The inner tube 145 is positioned inside the outer tube 146, wherein a head of the inner tube 145 and a head of the outer tube 146 have a certain distance therebetween, and an outer surface of the inner tube 145 has a second gap between an inner surface of the outer tube 146.

The inner tube 145 has a water inlet 147 at the rear thereof and a water outlet 148 at the rear thereof, and the outer tube 146 has a closed head and a water outlet 148 at the rear thereof, so that the inner tube 145 and the outer tube 146 constitute a cooling medium circulation passage.

It should be noted that: the head and tail of the outer tube 146 and inner tube 145 are relative, the tail being the end of the electrode 141 that is closer to the handle 11, i.e. the end that is further from the coagulation zone when in operation; the head is the end of the electrode 141 remote from the handle 11, i.e. the end which is inserted into the coagulation zone during operation. In the orientation of fig. 4 of the drawings, the left side is the tail of outer tube 146 and inner tube 145, and the right side is the head of outer tube 146 and inner tube 145.

The tail of outer tube 146 and the outer surface of inner tube 145 are sealed, and the sealing manner is not limited, for example, the tail of outer tube 146 and inner tube 145 may be sealed by a welding process.

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

Flow pattern of the cooling liquid inside the electrode 141: the cooling liquid enters the inner tube 145 from the rear 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 rear of the outer tube 146, finally 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 higher than that at the far end, which causes the tissue around the electrode 141 to be more easily dehydrated and dried, and if the tissue around the electrode 141 is dehydrated and dried too early, the current cannot be transmitted to the tissue at the far end, so that the tissue at the far end cannot be hemostatically treated, and the hemostasis range is greatly reduced.

And each electrode 141 of the hemostatic device has an internal fluid circulation function; when the water inlet pipe is connected with cooling liquid (which can be but is not limited to physiological saline), the water outlet 148 is communicated with the suction device, and the cooling liquid can flow through the inside of the whole electrode 141, so that the heat of the electrode 141 is taken away; the temperature of the electrode 141 is not too high (kept at about 25 ℃), so that the tissues around the electrode 141 are not dried and knotted too early, the phenomenon of sticking a knife is not easy to occur, and at the moment, the current can be transmitted out, so that the tissues at a distance generate heat, dehydrate and stop bleeding.

In addition, in other embodiments, the water outlet 148 may be disposed at other positions, for example, the water outlet 148 is disposed in the middle of the rotating portion 142 or at the intersection of the connecting portion 144 or the folding portion 143 and the connecting portion 144. However, at this time, the water outlet 148 is not easily communicated with a suction device, and the cooling liquid can only flow out from the water outlet 148 and act on the portion to be treated, and the waste water is sucked out of the body by the suction device alone.

To facilitate insertion of the electrode 141 into tissue, the head of the outer tube 146 is tapered to a pointed shape.

In addition, scales may be provided on the outer surface of the electrode 141, and the scales may allow a worker to know the depth of insertion of the electrode 141 into the tissue.

Referring to fig. 5, in the embodiment, four electrodes 141 are adopted, and after the electrodes 141 are completely folded, the folded portions 143 of the four electrodes 141 are gathered together and are closer to the center line of the fixing member 140, and the four electrodes 141 do not exceed the diameter range of the first folding arm.

Referring to fig. 6-9, the folding portions 143 of the four electrodes 141 may be arranged in a plurality of ways, such as a straight line, a circular arc, a rectangle, etc., as the electrodes 141 rotate.

Second embodiment

Referring to fig. 10, a foldable hemostatic device 10 is provided according to a second embodiment of the present invention, in which the foldable hemostatic device 10 includes a handle 11, a support rod 12, a folding assembly 13 and a foldable electrode assembly 14 according to the first embodiment.

First, the handle 11 mainly plays a role of supporting the support bar 12, the folding assembly 13, etc., as a basis of the entire structure, and facilitates the worker's hand-held operation, etc.

The style of the handle 11 is not limited, and in the present embodiment, the handle 11 may adopt, but is not limited to, the following structure:

the handle 11 has a mounting portion which is hollow inside for accommodating a part of the component structure and a hand-held portion for being held by a worker.

Secondly, as the main body of the folding hemostatic device 10, the support rod 12 mainly functions to connect the handle 11 and the folding electrode assembly 14, and can bring the electrode 141 to a designated coagulation area.

The material and type of the supporting rod 12 are not limited, in this embodiment, the supporting rod 12 is a tubular structure, and the inside of the supporting rod 12 is hollow, so that other components can be installed inside the supporting rod 12.

Of course, in other embodiments, the support rod 12 may be 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.

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

In the present 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 for driving the electrode 141 of the electrode 141 assembly to rotate, so that the electrode 141 assembly is folded or unfolded.

The folding assembly 13 may take the following configurations, but is not limited to:

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 tube 131.

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

Since the diameter of the supporting rod 12 is smaller and the steel pipes 131 are located inside the supporting rod 12, the number of the steel pipes 131 is larger, so that the distance between the steel pipes 131 is smaller and is not easy to control, and in order to improve this problem, in the embodiment, as shown in fig. 12, the steel pipes 131 include a rigid portion 132 and a flexible portion 133.

The rigid portion 132 is not deformable, the flexible portion 133 is adjacent to the folding knob 130, and the flexible portion 133 is able to flex and transmit torque. The flexible portion 133 is located outside the support rod 12 and allows the distance between the transmission members 134 to be increased as needed to prevent interference.

The steel pipe 131 is a circular metal pipe, and the flexible portion 133 is formed into a spiral shape by a spiral cutting process.

Of course, in other embodiments, the flexible portion 133 may take other configurations.

In addition, referring to fig. 13, the transmission member 134 further includes a flexible insulation layer 135 and an insulation hose 136.

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

The tail part of the inner pipe 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 passage and the auxiliary cooling medium circulation passage are communicated to form a complete cooling medium circulation passage.

The fitting relationship between the steel tube 131 and the foldable electrode assembly 14 is shown in fig. 14 (the flexible portion 133 in fig. 14 may be present), and the fitting 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 with the main machine through a welding sealed cable.

The folded hemostatic device 10 is illustrated in an operative configuration with reference to fig. 16-20.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The foldable electrode assembly (14) is characterized in that the foldable electrode assembly (14) comprises a fixing member (140) and at least two electrodes (141), the electrodes (141) comprise a rotating part (142), a connecting part (144) and a folding part (143) which are sequentially connected, the central line of the folding part (143) is not coincident with the central line of the rotating part (142), the rotating part (142) penetrates through the fixing member (140), and the folding part (143) rotates around the central line of the rotating part (142) to realize independent unfolding or folding of the electrodes (141).

2. The foldable electrode assembly of claim 1, wherein a center line of the rotating portion (142) and a center line of the folded portion (143) are parallel.

3. The foldable electrode assembly of claim 1, wherein the center line of the rotating portion (142) is parallel to the center line of the fixture (140), and the rotating portions (142) of the at least two electrodes (141) are distributed around the center line of the fixture (140).

4. The foldable electrode assembly of 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.

5. The foldable electrode assembly of claim 1, wherein the electrode (141) comprises an inner tube (145) and an outer tube (146), the inner tube (145) is located inside the outer tube (146), the tail of the inner tube (145) is provided with a water inlet (147) and the head is communicated with the outer tube (146), the head of the outer tube (146) is closed and the tail is provided with a water outlet (148), so that the inner tube (145) and the outer tube (146) form a cooling medium circulation channel.

6. The foldable electrode assembly of claim 5, wherein the tail of the outer tube (146) is closed to the outer surface of the inner tube (145), and the number of the water outlets (148) is plural and is uniformly distributed along the circumference of the outer tube (146).

7. The foldable electrode assembly of claim 5, characterized in that the head diameter of the outer tube (146) is tapered to form a needle point shape.

8. The foldable electrode assembly of claim 1, wherein the outer surface of the electrode (141) is provided with a scale.

9. 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 foldable electrode assembly (14) of any one of claims 1-8, the support rod (12) is connected to the handle (11), the electrode (141) is fixed to one end of the support rod (12), the folding assembly (13) is connected to the handle (11) and is configured to drive the foldable electrode assembly (14) to fold or unfold.

10. The folding hemostatic instrument according to claim 9, wherein the folding assembly (13) comprises a folding knob (130) and a steel tube (131), the folding knob (130) is rotatably connected to the handle (11), and both ends of the steel tube (131) are respectively connected to the rotating part (142) and the folding knob (130).

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