A foldable electrode assembly and a foldable hemostatic instrument

Abstract

The present invention relates to a foldable electrode assembly and a foldable hemostatic instrument, belonging to the field of medical devices. The foldable hemostatic instrument includes a handle, a support rod, a folding assembly, and a foldable electrode assembly. The foldable electrode assembly includes a fixing member and at least two electrodes. Each electrode includes a rotating portion, a connecting portion, and a folding portion connected in sequence. The center line of the folding portion does not coincide with the center line of the rotating portion. The rotating portion is inserted through the fixing member, enabling the folding portion to rotate around the center line of the rotating portion to achieve independent deployment or folding of the electrode. By enabling the electrode to rotate on the fixing member, the deployment or folding of multiple electrodes is achieved. When the electrode is folded, its volume is small, facilitating insertion into the site requiring hemostasis. When the electrode is deployed, its volume is large, enabling ultra-wide range, powerful, and effective hemostasis. Moreover, since the electrodes can rotate independently, multiple electrodes have different arrangement modes, which are suitable for hemostasis of sites with different shapes, with simple and rapid operation and strong practicability.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a foldable electrode assembly and a foldable hemostatic instrument. Background Art

[0002] Currently, "open" surgeries are commonly used for abdominal and thoracic surgeries, that is, the patient's abdominal or thoracic cavity is incised, and the diseased organs are exposed for surgery in an open state. Such open surgeries cause great damage to patients, with a long postoperative recovery period, obvious pain, and high hospitalization costs.

[0003] In the future, minimally invasive endoscopic surgery will surely be the main trend for abdominal or thoracic surgeries and other surgical procedures, such as endoscopic hepatectomy.

[0004] The liver is densely covered with blood vessels and is rich in blood; hepatectomy requires very high hemostasis requirements and needs to rely on powerful and effective hemostatic instruments.

[0005] However, currently, electrosurgical hemostatic instruments are often used in hepatectomy, such as electrosurgical knives, electrocoagulation forceps, ultrasonic scalpels, electrocoagulation forceps, etc.; these hemostatic instruments are usually used for surface hemostasis, with a small hemostasis depth and range, and low hemostasis efficiency during large-scale cutting surgeries. Moreover, the above-mentioned hemostatic instruments are bulky and cannot pass through trocars with a small diameter (inner diameter 5 - 15 mm) or endoscopes; they can only be used for open surgeries and are not suitable for endoscopic surgeries. And hemostatic instruments with a small volume usually have weaker hemostatic ability and cannot meet the hemostasis requirements of dry resection surgeries. The lack of hemostatic instruments that can be used for endoscopic operations makes endoscopic hepatectomy difficult to achieve. Summary of the Invention

[0006] In view of this, the purpose of the embodiments of the present invention is to provide a foldable electrode assembly. By enabling the electrodes to rotate on the fixing member, the deployment or folding of multiple electrodes is achieved. When the electrodes are folded, the volume is small, and it can be conveniently inserted into a trocar (inner diameter 5 - 15 mm) or an endoscope and enter the site that needs hemostasis. When the electrodes are deployed, the volume is large, and it can achieve ultra-large range, powerful and effective hemostasis; and because the electrodes can rotate independently, multiple electrodes have different arrangement methods and are suitable for hemostasis of parts with different shapes.

[0007] The purpose of the embodiments of the present invention is also to provide a foldable hemostatic instrument, which includes a foldable electrode assembly, can not only be conveniently inserted into the site that needs hemostasis, but also achieve ultra-large range, powerful and effective hemostasis, and can also arrange different electrode arrangement methods to hemostatize parts with different shapes, with simple, fast operation and strong practicability.

[0008] The embodiments of the present invention are implemented as follows:

[0009] An embodiment of the present invention provides a foldable electrode assembly. The foldable electrode assembly includes a fixing member and at least two electrodes. Each electrode includes a rotating portion, a connecting portion, and a folding portion connected in sequence. The center line of the folding portion does not coincide with the center line of the rotating portion. The rotating portion is inserted through the fixing member, so that the folding portion rotates around the center line of the rotating portion to realize independent unfolding or folding of the electrode.

[0010] As an alternative to the above embodiment, the center line of the rotating portion is parallel to the center line of the folding portion.

[0011] As an alternative to the above embodiment, the center line of the rotating portion is parallel to the center line of the fixing member, and the rotating portions of the at least two electrodes are distributed around the center line of the fixing member.

[0012] 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 rectangle.

[0013] As an alternative to the above embodiment, each electrode includes an inner tube and an outer tube. The inner tube is located inside the outer tube. A water inlet is provided at the tail of the inner tube, and the head of the inner tube communicates with the outer tube. The head of the outer tube is closed and a water outlet is provided at the tail, so that the inner tube and the outer tube form a cooling medium circulation channel.

[0014] As an alternative to the above embodiment, the tail of the outer tube is closed with the outer surface of the inner tube, and the number of the water outlets is multiple and evenly distributed along the circumferential direction of the outer tube.

[0015] As an alternative to the above embodiment, the diameter of the head of the outer tube gradually decreases to form a needle tip shape.

[0016] As an alternative to the above embodiment, a scale is provided on the outer surface of the electrode.

[0017] An embodiment of the present invention further provides a foldable hemostatic instrument. The foldable hemostatic instrument includes a handle, a support rod, a folding assembly, and the above-mentioned foldable electrode assembly. The support rod is connected to the handle, the electrode is fixed to one end of the support rod, and the folding assembly is connected to the handle and is configured to drive the foldable electrode assembly to fold or unfold.

[0018] As an alternative to the above embodiment, the folding assembly includes a folding knob and a steel pipe. The folding knob is rotatably connected to the handle, and two ends of the steel pipe are respectively connected to the rotating portion and the folding knob.

[0019] The beneficial effects of the present invention are:

[0020] The foldable hemostatic instrument provided by the present invention comprises a handle, a support rod, a folding assembly and a foldable electrode assembly. By enabling the electrodes to rotate on the fixing member, the deployment or folding of multiple electrodes is achieved. When the electrodes are folded, the volume is small, and it can be conveniently inserted into a puncture device (inner diameter 5 - 15 mm) or an endoscope to enter the site that needs hemostasis. When the electrodes are deployed, the volume is large, and hemostasis with a super large range, strong effect can be achieved. And since the electrodes can rotate independently, multiple electrodes have different arrangement modes, which are suitable for hemostasis of parts with different shapes, and the operation is simple, fast and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. As shown by the drawings, the above-mentioned and other objects, features and advantages of the present invention will become clearer. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale in actual size, and the focus is on showing the gist of the present invention.

[0022] Figure 1 Fig. shows a schematic structural diagram of a foldable electrode assembly provided by the first embodiment of the present invention;

[0023] Figure 2 Fig. shows Figure 1 a cross-sectional view of

[0024] Figure 3 Fig. shows a schematic diagram of the cooperation relationship between the working electrode and the return electrode;

[0025] Figure 4 Fig. shows a cross-sectional view of the electrode;

[0026] Figure 5 Fig. shows Figure 1 a schematic diagram of the folded state from one perspective of

[0027] Figure 6 Fig. shows Figure 1 a schematic diagram of the folded state from another perspective of

[0028] Figure 7 Fig. shows a schematic diagram of one of the deployment modes of the electrode;

[0029] Figure 8 Fig. shows a schematic diagram of another deployment mode of the electrode;

[0030] Figure 9 Fig. shows Figure 8 a schematic diagram of the deployed state of

[0031] Figure 10 Shows a schematic structural diagram of a foldable hemostatic instrument provided by the second embodiment of the present invention;

[0032] Figure 11 Shows Figure 10 Cross-sectional view of;

[0033] Figure 12 Shows a schematic structural diagram of a steel pipe;

[0034] Figure 13 Shows a hierarchical diagram of transmission parts;

[0035] Figure 14 Shows a schematic diagram of the cooperation relationship between a steel pipe and a foldable electrode assembly;

[0036] Figure 15 Shows a schematic diagram of the cooperation relationship between a transmission part and a foldable electrode assembly;

[0037] Figure 16 Shows a schematic diagram of the first working state of the foldable hemostatic instrument;

[0038] Figure 17 Shows a schematic diagram of the second working state of the foldable hemostatic instrument;

[0039] Figure 18 Shows a schematic diagram of the effect after multiple ablations in a linear arrangement;

[0040] Figure 19 Shows a schematic diagram of the third working state of the foldable hemostatic instrument;

[0041] Figure 20 Shows a schematic diagram of the effect after multiple ablations in an arc arrangement.

[0042] Icon:

[0043] 10 - Foldable hemostatic instrument;

[0044] 11 - Handle; 12 - Support rod; 13 - Folding assembly; 14 - Foldable electrode assembly;

[0045] 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; 142 - Rotating part; 143 - Folding part; 144 - Connecting part; 145 - Inner tube; 146 - Outer tube; 147 - Water inlet; 148 - Water outlet. Detailed implementation manners

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0047] In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0048] First Embodiment

[0049] Please refer to Figure 1 As shown, the first embodiment of the present invention provides a foldable electrode assembly 14, and the foldable electrode assembly 14 can play a hemostatic role.

[0050] Among them, 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.

[0051] The fixing member 140 can adopt a block structure. In this embodiment, the fixing member 140 is cylindrical, and a plurality of mounting through holes are provided on the fixing member 140 (please refer to Figure 2 As shown, in this embodiment, the number of mounting through holes is selected to be four).

[0052] Of course, the fixing member 140 can also adopt regular shapes such as prisms or other irregular shapes.

[0053] In this embodiment, the center lines of the mounting through holes can 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 center lines of the mounting through holes and the center line of the fixing member 140 can also be skew or intersecting.

[0054] In one embodiment, multiple electrodes 141 are all monopolar electrodes, that is, each electrode is a working electrode. At this time, during actual operation, a negative electrode plate needs to be used in cooperation. The number of electrodes 141 can also be selected as two, three, five, etc. Through repeated experiments by researchers, it is known that due to the limitations of microscopic surgical operations, when the number of electrodes 141 is four, the efficiency is high and the hemostatic effect is good.

[0055] In this embodiment, the electrodes 141 are connected to the fixing member 140, and the four electrodes 141 are arranged in a rectangular distribution, that is, the mounting through holes are arranged in a rectangular distribution around the center line of the fixing member 140.

[0056] Please refer to Figure 3As shown, in another more optimal embodiment, the electrode 141 is divided into a working electrode and a return electrode. In this case, one working electrode and one return electrode form a set of electrodes 141, and at least one set of electrodes 141 is provided. Commonly used numbers of sets are 1 set, 2 sets or 3 sets. Whether to set it as a bent structure is selected according to the caliber size of the endoscope. That is, when the number of sets of electrodes 141 is 1 set, generally, the electrode 141 does not need to be set as a bent structure. Only when the applicable trocar (inner diameter 5 - 15 mm) or the endoscope caliber is small, the bent structure of the electrode 141 is required. When each electrode 141 is arranged in a row, the distal distance between the working electrode and the return electrode in the same set is 5 - 12 mm, the diameter of each electrode 141 is 1 - 3 mm, and the length of each electrode 141 exposed from the fixing member 140 or the first folding arm is 3 - 10 cm. Here, the "distal end" refers to the end closer to the action site during endoscopic surgery.

[0057] When multiple sets of electrodes 141 are provided, the working electrodes and the return electrodes are alternately distributed, and each electrode 141 is insulated from each other.

[0058] The way that the working electrodes and the return electrodes are alternately distributed can connect the coagulation areas generated between the electrodes 141 together, thereby generating a larger coagulation area.

[0059] Of course, in another deteriorated embodiment, the way of "working electrode - return electrode - return electrode - working electrode" or "return electrode - working electrode - working electrode - return electrode" can also be adopted. The coagulation areas generated in this way are disconnected, and a good coagulation area is not formed between different sets.

[0060] Under the action of the radiofrequency host, the foot controller or manual control is used to turn on and off the high-frequency current, and the high-frequency current flows between the working electrode and the return electrode. Since the tissue has a certain impedance, heat is generated when the high-frequency current flows through the tissue, and this heat causes the tissue spiral protein to contract and dehydrate, closing the blood vessels, thereby achieving the hemostasis function. During hemostasis, the electrode 141 itself does not heat up, and the heat for hemostasis comes from the heat generated by "Joule heating" when the current flows through the tissue.

[0061] Among them, please refer to Figure 2 、 Figure 3 As shown, the electrode 141 includes a rotating part 142, a connecting part 144 and a folding part 143 connected in sequence.

[0062] The rotating part 142 is inserted into 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 center line.

[0063] 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 central axis of the rotating part 142. When the electrodes 141 are arranged in a row, the distal distance between the folding parts 143 of the same group of working electrodes and loop electrodes is 5-12 mm.

[0064] Among them, the central axis of the folding part 143 does not coincide with the central axis of the rotating part 142. The central axis of the folding part 143 and the central axis of the rotating part 142 can be skew, intersecting, etc. In this embodiment, the central axis of the folding part 143 is parallel to the central axis of the rotating part 142.

[0065] The connecting part 144 is used to connect the rotating part 142 and the folding part 143.

[0066] The shape of the connecting part 144 is not limited. For example, the connecting part 144 adopts a curved structure, a straight structure, etc. In this embodiment, the connecting part 144 adopts a straight structure.

[0067] The included angle between the central axis of the connecting part 144 and the central axis of the rotating part 142, and the included angle between the central axis of the connecting part 144 and the central axis of the folding part 143 are not limited. For example, the connecting part 144 is perpendicular to the rotating part 142 and the folding part 143 respectively, and the included angle between the central axis of the connecting part 144 and the central axis of the rotating part 142, and the included angle between the central axis of the connecting part 144 and the central axis of the folding part 143 are obtuse angles, etc.

[0068] In this embodiment, the included angle between the central axis of the connecting part 144 and the central axis of the rotating part 142 is an obtuse angle, and the included angle between the central axis of the connecting part 144 and the central axis of the folding part 143 is an obtuse angle. The angular range of the obtuse angle can be controlled between 120°-150°, such as 120°, 135°, 150°, etc.

[0069] This angular range enables the different electrodes 141 not to interfere with each other when rotating independently, so that the electrodes 141 can achieve a 360° rotation around the central axis of the rotating part 142.

[0070] When the electrode 141 rotates around the central axis of the rotating part 142, the independent unfolding or folding of the electrode 141 can be realized, and the rotations of different electrodes 141 do not interfere with each other. That is, when one electrode 141 rotates, whether the remaining electrodes 141 rotate, the rotation direction, and the rotation angle are not affected.

[0071] It should be noted that the expansion or folding of the electrode 141 means that the distance between the center line of the folding part 143 and the center line of the fixing part 140 increases or decreases as the electrode 141 rotates. The extreme state of the expansion of the electrode 141 is that the distance between the center line of the folding part 143 and the center line of the fixing block is the largest, and the extreme state of the folding of the electrode 141 is that the distance between the center line of the folding part 143 and the center line of the fixing block is the smallest.

[0072] There is a smooth transition between the connecting part 144 and the rotating part 142, and between the connecting part 144 and the folding part 143.

[0073] In addition, in order to facilitate the operation of the surgery under the microscope as much as possible, it is necessary to control that in the folded state, the four electrodes 141 do not exceed the diameter range of the fixing part 140.

[0074] The electrode 141 is integrally bent and hollow inside. Specifically, please refer to Figure 4 As shown, the electrode 141 includes an inner tube 145 and an outer tube 146.

[0075] Both the inner tube 145 and the outer tube 146 can be made of metal materials. For a single electrode 141, the inner tube 145 and the outer tube 146 are first assembled, then welded and fixed, and finally bent.

[0076] The inner tube 145 is located inside the outer tube 146. Among them, there is a certain distance between the head of the inner tube 145 and the head of the outer tube 146, and there is a second gap between the outer surface of the inner tube 145 and the inner surface of the outer tube 146.

[0077] 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.

[0078] It should be noted that: the heads and tails of the outer tube 146 and the inner tube 145 are relative. The tail refers to the end of the electrode 141 close to the handle 11, that is, the end far from the coagulation area during operation; the head refers to the end of the electrode 141 far from the handle 11, that is, the end inserted into the coagulation area during operation. In the orientation of the attached drawing Figure 4 In the figure, 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.

[0079] Among them, the tail of the outer tube 146 is closed with the outer surface of the inner tube 145, and the closing method is not limited. For example, the tail of the outer tube 146 can be closed with the inner tube 145 by welding process, etc.

[0080] The number of the water outlets 148 is multiple and they are evenly distributed along the circumferential direction of the outer tube 146.

[0081] Flow pattern 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 flows along the second gap between the inner tube 145 and the outer tube 146 and flows out from the water outlet 148.

[0082] The current density around the electrode 141 is much greater than that in the distance, which causes the tissue around the electrode 141 to be more prone to dehydration and dryness. If the tissue around the electrode 141 dehydrates and dries prematurely, the current cannot be transmitted to the farther tissue, so that the tissue in the distance cannot be hemostatic, and the hemostatic range is greatly reduced.

[0083] Each electrode 141 of the hemostatic device has an internal liquid circulation function; when the water inlet pipe is connected to the cooling liquid (which can be but is not limited to normal saline) and the water outlet 148 is connected to the suction device, at this time the cooling liquid can flow through the inside of the whole electrode 141, thereby taking away the heat of the electrode 141; the temperature of the electrode 141 will not be too high (maintained at about 25 °C), so the tissue around the electrode 141 will not dry prematurely and is not prone to the "sticking knife phenomenon". At this time, the current can be transmitted, causing the tissue in the distance to generate heat, dehydrate and stop bleeding.

[0084] In addition, in other embodiments, the water outlet 148 can also be arranged at other positions, for example, the water outlet 148 is 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, etc. However, at this time, it is not convenient for the water outlet 148 to be connected to the suction device. The cooling liquid can only flow out from the water outlet 148 and act on the part to be treated. It is necessary to separately use a suction device to suck the waste water out of the body.

[0085] In order to facilitate the insertion of the electrode 141 into the tissue, the diameter of the head of the outer tube 146 gradually decreases to form a needle tip shape.

[0086] In addition, scales can be provided on the outer surface of the electrode 141, and the scales can enable the staff to know the depth of insertion of the electrode 141 into the tissue.

[0087] Please refer to Figure 5 As shown, in this embodiment, four electrodes 141 are used. After the electrodes 141 are completely folded, the folding parts 143 of the four electrodes 141 gather together and are closer to the center line of the fixing part 140. The four electrodes 141 do not exceed the diameter range of the first folding arm.

[0088] Please refer to Figures 6 - 9 As shown, as the electrode 141 rotates, the folding parts 143 of the four electrodes 141 can present various arrangement forms, such as a straight line shape, an arc shape, a rectangle shape, etc.

[0089] Second Embodiment

[0090] Please refer to Figure 10 As shown, the second embodiment of the present invention further provides a folding hemostatic instrument 10, which includes a handle 11, a support rod 12, a folding assembly 13, and the folding electrode assembly 14 in the first embodiment.

[0091] First, as the basis of the entire structure, the handle 11 mainly serves to support the support rod 12, the folding assembly 13, etc., and is convenient for the staff to hold and operate.

[0092] The style of the handle 11 is not limited. In this embodiment, the handle 11 may adopt but is not limited to the following structure:

[0093] The handle 11 has a mounting portion and a holding portion. The inside of the mounting portion is hollow for accommodating some component structures, and the holding portion is for the staff to hold.

[0094] Secondly, as the main body of the folding hemostatic instrument 10, the support rod 12 mainly serves to connect the handle 11 and the folding electrode assembly 14, and can drive the electrode 141 to reach the designated coagulation area.

[0095] 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 inside of the support rod 12 is hollow so that other components can be installed inside.

[0096] 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.

[0097] 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.

[0098] Among them, the fixing member 140 can seal the end of the support rod 12, and the mounting through hole is communicated with the inside of the support rod 12.

[0099] In this embodiment, the center line of the mounting through hole can be parallel to the center line of the support rod 12.

[0100] Then, the rotation of the electrode 141 is realized by the folding assembly 13. The folding assembly 13 is used to drive the rotation of the electrode 141 of the electrode 141 assembly, so that the electrode 141 assembly can be folded or unfolded.

[0101] The folding assembly 13 may adopt but is not limited to the following structure:

[0102] Please refer to Figure 11 As shown, the folding assembly 13 includes a folding knob 130 and a transmission member 134, among which the transmission member 134 includes a steel pipe 131.

[0103] 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 rotates, it can drive the electrode 141 to rotate through the steel pipe 131.

[0104] Since the diameter of the support rod 12 is small, and the steel pipes 131 are located inside the support rod 12 and there are a large number of steel pipes 131, the distance between the steel pipes 131 is small and not easy to control. To improve this problem, in this embodiment, please refer to Figure 12 As shown, the steel pipe 131 includes a rigid part 132 and a flexible part 133.

[0105] The rigid part 132 is non-deformable. The flexible part 133 is adjacent to the folding knob 130. The flexible part 133 can bend and transmit torque. The flexible part 133 is located outside the support rod 12. The flexible part enables the distance between the transmission parts 134 to be increased as needed to prevent mutual interference.

[0106] The steel pipe 131 is made of a circular metal pipe, and the flexible part 133 is made into a spiral shape by means of spiral cutting.

[0107] Of course, in other embodiments, the flexible part 133 can also adopt other structures.

[0108] In addition, please refer to Figure 13 As shown, the transmission part 134 further includes a flexible insulating layer 135 and an insulating hose 136.

[0109] 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. 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 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.

[0110] The tail of the inner pipe 145 is communicated with the insulating hose 136. 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.

[0111] For the mating relationship between the steel pipe 131 and the folding electrode assembly 14, please refer to Figure 14 As shown ( Figure 14 the flexible part 133 in it can be present or absent), for the mating relationship between the transmission part 134 and the folding electrode assembly 14, please refer to Figure 15 As shown. The tail of the steel pipe 131 is electrically connected to the host through a welded and sealed cable.

[0112] For the working state of the folding hemostatic instrument 10, please refer to Figures 16 - 20 As shown.

[0113] The above are only the 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 modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A foldable electrode assembly, characterized in that, The folding electrode assembly (14) includes a fixing member (140) and at least two electrodes (141). The electrode (141) includes a rotating portion (142), a connecting portion (144), and a folding portion (143) connected in sequence. The center line of the folding portion (143) is parallel to the center line of the rotating portion (142). The rotating portion (142) passes through the fixing member (140), and the center line of the rotating portion (142) is parallel to the center line of the fixing member (140). The rotating portions (142) of the at least two electrodes (141) are distributed around the center line of the fixing member (140); the folding portion (143) is rotated around the center line of the rotating portion (142) to realize the independent unfolding or folding of the electrode (141).

2. The foldable electrode assembly according to claim 1, characterized in that, The number of the electrodes (141) is four, and the rotating portions (142) of the four electrodes (141) are arranged in a rectangular shape.

3. The foldable electrode assembly according to claim 1, characterized in that, The electrode (141) includes an inner tube (145) and an outer tube (146). The inner tube (145) is located inside the outer tube (146). A water inlet (147) is provided at the tail of the inner tube (145), and the head of the inner tube (145) communicates with the outer tube (146). The head of the outer tube (146) is closed, and a water outlet (148) is provided at the tail, so that the inner tube (145) and the outer tube (146) form a cooling medium circulation channel.

4. The foldable electrode assembly according to claim 3, characterized in that, 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).

5. The foldable electrode assembly according to claim 3, characterized in that, The diameter of the head of the outer tube (146) gradually decreases to form a needle tip shape.

6. The foldable electrode assembly according to claim 1, characterized in that, A scale is provided on the outer surface of the electrode (141).

7. A foldable hemostatic instrument, characterized in that, The folding hemostatic instrument (10) includes a handle (11), a support rod (12), a folding assembly (13), and the folding electrode assembly (14) according to any one of claims 1-6. 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 folding electrode assembly (14) to fold or unfold.

8. The foldable hemostatic instrument according to claim 7, characterized in that, The folding assembly (13) includes a folding knob (130) and a steel pipe (131). The folding knob (130) is rotatably connected to the handle (11). Two ends of the steel pipe (131) are respectively connected to the rotating portion (142) and the folding knob (130).

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