Hysteroscopic plasma loop snare and method of use

Abstract

This invention discloses a hysteroscopic plasma snare device, comprising an operating handle, an operating ring electrode rod, a plasma coil, a basket, and a coagulation electrode. The operating ring is fitted onto the operating handle, the electrode rod is located at one end of the operating handle, and the plasma coil is located at one end of the electrode rod. The plasma coil is controllably contracted within the electrode rod. The basket for retrieving excised tissue is located on the plasma coil, and the coagulation electrode is located at the end of the plasma coil, allowing for controlled coagulation at the tissue excision site. Advantages include: supplying physiological saline to the plasma coil at one end of the electrode rod to generate plasma for excision of the affected tissue; ease of use and preservation of the excised tissue; using the basket to hold the excised tissue for complete removal, facilitating pathological analysis; and timely coagulation at the excision site using the coagulation electrode, reducing postoperative complications and avoiding equipment changes during surgery, making it convenient and quick to use.

Description

Technical Field

[0001] This invention specifically relates to a hysteroscopic plasma snare device and its usage method. Background Technology

[0002] Uterine fibroids, endometrial polyps, and intrauterine adhesions are common gynecological diseases. Currently, hysteroscopic procedures are often performed during inpatient and outpatient treatment for uterine fibroid removal, endometrial polyp resection, and intrauterine adhesion removal.

[0003] Currently, polyp removal and treatment utilize cold blades, cold blade shaving, and plasma knife electrocautery. However, ordinary cold blades cannot coagulate the tissue at the removal site after polyp removal. Therefore, it is necessary to use an electrocautery rod to coagulate the removed tissue after removal, which is a relatively complicated procedure and prolongs the operation time.

[0004] In addition, during tissue removal, cold knife ablation uses mechanical force to spin and pulverize the tissue to be removed. After the tissue is pulverized, it is impossible to obtain complete tissue, and the pathology of polyps is easily lost, affecting the patient's pathological examination. When using the existing plasma electrosurgical knife to remove the patient's tissue, it is necessary to change to an electrosurgical endoscope for the operation, which cannot be completed under hysteroscopy, thus prolonging the operation time.

[0005] Therefore, there is a need for a surgical device that can save surgical time and completely and conveniently remove polyp tissue, prevent polyp loss, and also coagulate the tissue at the excised site to reduce postoperative complications. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is the problem mentioned in the background art that existing hysteroscopic surgical resection equipment cannot achieve coagulation of the resected tissue after surgery.

[0007] The second technical problem to be solved by the present invention is that, as mentioned in the background art, the existing hysteroscopic surgical resection equipment pulverizes the removed tissue after resection, making it impossible to obtain complete tissue, which affects the detection of the patient's pathology.

[0008] To address the aforementioned technical problems, a hysteroscopic plasma snare is proposed, achieved through the following technical solution: A hysteroscopic plasma snare includes an operating handle, an operating ring electrode rod, a plasma coil, a basket, and a coagulation electrode. The operating ring is movably fitted onto the operating handle. The electrode rod is located at one end of the operating handle. The plasma coil for tissue resection is located at one end of the electrode rod. The plasma coil is controllably constricted within the electrode rod via the operating ring and a coil retraction assembly connected to the operating ring. The basket for removing the resected tissue is located on the plasma coil. The basket tightens its opening as the plasma coil is constricted. The coagulation electrode is located at the end of the plasma coil, and the coagulation electrode controllably coagulates the tissue resection site.

[0009] In a preferred embodiment of the present invention, the electrode rod includes a rod body, an electrode rod fixing ring, and a water inlet pipe. The electrode rod fixing ring is disposed at one end of the rod body, and the rod body is mounted on the operating handle via the electrode rod fixing ring. The water inlet pipe for supplying physiological saline to the ion coil is disposed inside the rod body. One end of the water inlet pipe is connected to the ion coil, and the other end is connected to an external water supply end via the operating handle. The water inlet pipe facilitates the continuous supply of physiological saline to the ion coil, which is conducive to the excitation of plasma.

[0010] In a preferred embodiment of the present invention, the plasma coil includes a coil body disposed at the end of the electrode rod. A liquid guiding strip is disposed on the inner side of the coil body, and an inlet pipe for supplying physiological saline is disposed on the liquid guiding strip. Such a device facilitates the stable accumulation of physiological saline on the plasma coil, thereby facilitating plasma excitation.

[0011] In a preferred embodiment of the present invention, a fluid guiding groove is recessed on the upper and lower surfaces of the fluid guiding strip. The saline solution supplied by the water inlet pipe flows through the fluid guiding groove to the entire ring body. The fluid guiding groove facilitates the stable excitation of plasma on the ring body and facilitates the removal of tissue.

[0012] In a preferred embodiment of the present invention, a bending portion is provided on the ring body. The bending portion is located at one end of the ring body away from the electrode rod. The ring body is contracted within the electrode rod along the bending portion. The bending portion ensures that the ring body can be contracted within the electrode rod along the bending portion when it is contracted, thus facilitating the contraction of the ring body.

[0013] In a preferred embodiment of the present invention, the plasma coil convergence assembly includes a coil fixing tube, a limiting tube, and a corrugated tube. The corrugated tube is disposed inside the electrode rod, and one end of the corrugated tube is detachably and fixedly connected to the electrode rod. The coil fixing tube for mounting the plasma coil is disposed at the other end of the corrugated tube. The limiting tube for fixing and limiting the plasma coil disposed on the coil fixing tube is sleeved on the outside of the coil fixing tube. The arrangement of the plasma coil convergence assembly facilitates the control of the plasma coil convergence and also facilitates the closure of the opening of the basket, making it convenient for the removal of the excised tissue.

[0014] In a preferred embodiment of the present invention, a pull rope fixing end is provided on the plasma coil fixing tube for installing a pull rope. The plasma coil fixing tube retracts into the rod body under the action of the pull rope, while the corrugated tube is compressed by force. The retractable design of the corrugated tube facilitates providing space for the plasma coil to converge.

[0015] In a preferred embodiment of the present invention, a reset spring is fitted around the outside of the bellows. The bellows, after shrinking, can be controllably reset under the action of the reset spring. This arrangement facilitates the control of the ion coil extending from the electrode rod.

[0016] In a preferred embodiment of the present invention, the coagulation electrode includes an electrode head and an electrode coating. The electrode coating is disposed at the end of the coil body, and the electrode head is disposed inside the electrode coating. The working surface of the electrode head protrudes from the surface of the electrode coating. The arrangement of the coagulation electrode facilitates the clotting of the excised tissue through the electrode head on the coagulation electrode, thereby reducing postoperative complications.

[0017] To address the aforementioned problems, this invention also proposes a method for using a plasma snare device under hysteroscopy, specifically including the following steps:

[0018] S1: Device Connection: Connect the cable on the operating handle to an external device;

[0019] S2: Pre-installation treatment of equipment: Store the plasma coil inside the electrode rod;

[0020] S3: Device insertion: Under the guidance of a hysteroscope, the tip of the electrode rod is inserted into the patient's affected area;

[0021] S4: Tissue Removal: Place the ion coil around the tissue to be removed, turn on the device, and the water inlet pipe continuously supplies physiological saline to the ion coil, thereby stimulating plasma to remove the tissue at the affected site.

[0022] S5: Tissue Removal: The removed tissue is collected using the basket on the ion coil, and the ion coil is closed using the coil closing assembly to seal the opening of the basket. Then the electrode rod is removed, and the removed tissue is taken out.

[0023] S6: Coagulation at the excision site: Turn on the power to the coagulation electrode, place the electrode tip of the coagulation electrode against the area to be coagulated, and coagulate the area.

[0024] The beneficial effects of this invention compared to the prior art are:

[0025] The technical solution of this invention involves continuously supplying physiological saline to a plasma coil that can be retracted into one end of an electrode rod via an inlet pipe. The saline solution is then excited at the plasma coil to generate plasma, which is used to remove the tissue enclosed by the plasma coil. This method is convenient, reduces bleeding, and ensures the integrity of the removed tissue. A basket mounted on the plasma coil is used to hold the removed tissue, allowing for complete removal and facilitating subsequent pathological analysis. Furthermore, a coagulation electrode at the end of the plasma coil is used to promptly coagulate the removed area, reducing postoperative complications and avoiding the need for equipment replacement during surgery. The method is convenient and quick to use. Attached Figure Description

[0026] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 (Plasma coil unfolds);

[0027] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 (Plasma coil convergence);

[0028] Figure 3 A three-dimensional schematic diagram of the control handle;

[0029] Figure 4 A partial sectional view of the operating handle (including the operating ring);

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 A three-dimensional schematic diagram of a plasma coil (including a coagulation electrode);

[0032] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0033] Figure 8 A three-dimensional schematic diagram of the electrode rod;

[0034] Figure 9 This is a partial cross-sectional view of this embodiment;

[0035] Figure 10 for Figure 9 Enlarged view at point C;

[0036] Figure 11 for Figure 9 Enlarged view at point D;

[0037] Figure 12 for Figure 9 Enlarged view at point E in the middle;

[0038] Figure 13 for Figure 9 Enlarged view at point F;

[0039] Explanation of reference numerals in the attached diagram: 1-Operating handle, 11-Upper cover of handle, 12-Lower cover of handle, 13-Handle pull ring, 14-Wire guide tube, 15-Scale, 16-Operating pull ring groove, 17-Wire routing hole, 2-Operating pull ring, 21-Pull ring sleeve, 22-Slide bar, 23-Pull ring, 24-Pull rope fixing plate, 3-Electrode rod, 31-Rod body, 32-Electrode rod fixing ring, 33-Water inlet pipe, 34-Fixing slot, 35-Sub-water inlet pipe, 4-Electrode coil coiling assembly 401-Electrode fixing tube, 402-Limiting tube, 403-Corrugated tube, 404-Cap, 405-Pull rope fixing end, 406-First limiting ring, 407-Second limiting ring, 408-Pull rope, 409-Reset spring, 410-Limiting ring fixing hole, 5-Plasma coil, 51-Coil body, 52-Liquid guiding strip, 53-Bending part, 54-Liquid guiding groove, 6-Net basket, 7-Cable, 8-Coagulation electrode, 81-Electrode head, 82-Electrode coating. Detailed Implementation

[0040] The following will refer to the appendices in the embodiments of the present invention. Figure 1-13 The technical solutions in the embodiments of the present invention will be described in detail below. Example

[0041] like Figure 1 , 2 As shown in Figure 9, a hysteroscopic plasma snare includes an operating handle 1, an operating pull ring 2, an electrode rod 3, a plasma snare assembly 4, a plasma snare 5, a basket 6, a cable 7, and a coagulation electrode 8. The electrode rod 3 is mounted on one end of the operating handle 1, the operating pull ring 2 is fitted over the outside of the operating handle 1, the plasma snare 5 is positioned at one end of the electrode rod 3, the basket 6 is mounted on the plasma snare 5, the coagulation electrode 8 is positioned at one end of the plasma snare 5, and the plasma snare assembly 4 is located inside the electrode rod 3. The plasma snare assembly 4 connects the operating pull ring 2 and the plasma snare 5, and the plasma snare 5 can be controllably constricted within the electrode rod 3 under the action of the plasma snare assembly 4 and the operating pull ring 2.

[0042] The main function of the operating handle 1 is to serve as a carrier for mounting the electrode rod 3, and it also provides a grip for the user to hold and operate.

[0043] The electrode rod 3 is used to connect the operating handle 1 and the plasma coil 5, and also to facilitate the user to insert the plasma coil 5 into the patient's body near the lesion.

[0044] The main function of the operating pull ring 2 is to connect with the plasma coil 5 at the front end of the electrode rod 3 so as to control the plasma coil 5 to perform the cutting action of polyp tissue.

[0045] The function of the plasma coil converging assembly 4 is to connect the plasma coil 5 and the operating pull ring 2, so as to facilitate the movement of the plasma coil 5 at the front end of the electrode rod 3 to perform the polyp removal action by controlling the operation pull ring 2.

[0046] The plasma coil 5 is used to generate plasma to cut the patient's polyp tissue and is the core component of the device.

[0047] The basket 6 is installed at the lower part of the plasma coil 5. Its main function is to hold the cut tissue blocks, which facilitates the collection of pathological tissue after excision.

[0048] The cable 7 integrates a power supply line and a water inlet pipe 33. The cable 7 as a whole provides power support and a continuous supply of saline solution for the plasma excitation of the plasma coil 5.

[0049] The coagulation electrode 8 is located at the front end of the plasma coil 5. The main function of the coagulation electrode 8 is to coagulate blood at the excised site, which facilitates coagulation during the operation, reduces postoperative complications, and avoids the need to change equipment during the operation. It is convenient and quick to use.

[0050] like Figure 1 , 3 As shown in Figures 9 and 13, the operating handle 1 includes two parts: an upper handle cover 11 and a lower handle cover 12. Both parts are made of injection-molded shells. The upper handle cover 11 and the lower handle cover 12 can be fixed together with screws to form a complete operating handle 1. The overall outline of the assembled operating handle 1 conforms to the curve of the human hand, making it easy for the operator to hold for a long time and improving the comfort of use.

[0051] To facilitate power supply to the entire device, an arc-shaped ring protrudes from the side of the upper handle cover 11 and the lower handle cover 12. When the upper handle cover 11 and the lower handle cover 12 are closed, the two arc-shaped rings form a hollow circular tube, which is named the conductor tube 14. The cable 7 is inserted into the operating handle 1 through this conductor tube 14 and connected to the plasma coil 5 at the end of the electrode rod 3. The other end of the cable 7 is connected to the external power supply and water supply device.

[0052] To facilitate user grip and control of the plasma coil 5's retraction, a ring-shaped handle pull ring 13 is provided at one end of the upper handle cover 11 and the lower handle cover 12. During use, the operator's thumb can be placed inside the handle pull ring 13. In addition, the handle pull ring 13 is integrally injection molded with the upper handle cover 11 or the lower handle cover 12. When the upper handle cover 11 and the lower handle cover 12 are closed, the two handle pull rings 13 also combine to form a complete ring.

[0053] To facilitate the installation of the operating pull ring 2 and to make it easier to control the retraction of the plasma coil 5 via the operating pull ring 2, a rectangular groove is recessed perpendicularly to the side at the opening of the upper handle cover 11 and the lower handle cover 12. The lower surface of this groove is flush with the lower surface of the upper handle cover 11 or the lower handle cover 12. When the upper handle cover 11 and the lower handle cover 12 are closed, the two rectangular grooves form a groove with a rectangular cross-section. This groove is named the operating pull ring groove 16. The slider 22 in the operating pull ring 2 can slide in the operating pull ring groove 16.

[0054] To ensure stable sliding of the operating pull ring 2, operating pull ring grooves 16 are provided on both the left and right sides of the operating handle 1, with two sets of operating pull ring grooves 16 facing each other. In addition, to facilitate the control of the plasma coil 5 to retract into the electrode rod 3 by the coil retraction assembly 4, a circular hole is provided on the side of the operating pull ring groove 16 away from the handle pull ring 13. This hole is named wiring hole 17. The pull rope 408 in the coil retraction assembly 4 that controls the retraction of the plasma coil 5 passes through this wiring hole 17 and connects to the operating pull ring 2. By pulling the operating pull ring 2, the plasma coil 5 can be retracted into the electrode rod 3. In addition, to facilitate understanding of the distance moved by the operating pull ring 2, a scale 15 is printed on the handle cover 11. The distance moved by the operating pull ring 2 can be directly seen through the scale 15.

[0055] Definition: Based on the surfaces where the upper cover 11 and the lower cover 12 of the handle meet, the surfaces where they fit together are the lower surface, and the surfaces opposite to them are the upper surface; the end where the plasma coil 5 is installed is the front end, and the operating handle 1 is the end end.

[0056] like Figure 1 , 3 As shown in Figures 4 and 5, the operating pull ring 2 includes a pull ring sleeve 21, a slider 22, and a pull ring 23. The pull ring sleeve 21 is fitted over the outside of the operating handle 1 and can slide along the operating handle 1. The pull ring 23 is arranged on both sides of the pull ring sleeve 21 for easy gripping by the user. The slider 22 is detachably arranged inside the pull ring sleeve 21. The slider 22 on the pull ring sleeve 21 is inserted into the operating pull ring groove 16, and the pull ring sleeve 21 slides relative to the operating pull ring groove 16 along the slider 22.

[0057] The pull ring sleeve 21 is a ring with a rectangular cross-section. The pull ring sleeve 21 is made of medical-grade plastic, such as PP. The internal dimensions of the pull ring sleeve 21 are slightly larger than the external dimensions of the operating handle 1. The pull ring sleeve 21 can be fitted over the outside of the operating handle 1.

[0058] Pull ring 23 is a circular ring. The main function of pull ring 23 is to place the user's index and middle fingers. The thumb placed in the handle pull ring 13 controls the operation of the pull ring 2 on the operating handle 1. There is one pull ring 23 on each side of the pull ring sleeve 21, and the pull ring 23 and the pull ring sleeve 21 are integrally injection molded.

[0059] The slider 22 is a plastic strip with a rectangular cross-section. The cross-sectional dimension of the slider 22 is slightly smaller than the cross-sectional dimension of the operating pull ring groove 16. The length of the slider 22 is less than the length of the operating pull ring groove 16. The slider 22 can be placed in the operating pull ring groove 16 and slide along the operating pull ring groove 16.

[0060] To facilitate the installation of the slider 22, a circular mounting hole is provided on each side of the pull ring sleeve 21 near the end. The slider 22 can be fixed in the pull ring sleeve 21 by screws through the mounting holes. In order to prevent the slider 22 from falling off the pull ring sleeve 21, two sliders 22 are provided on the pull ring sleeve 21, and the two sliders 22 are distributed opposite each other on the inner side of the pull ring sleeve 21.

[0061] To facilitate the installation of the cable 408 in the plasma coil retraction assembly 4, a cable fixing piece 24 is integrally provided with the two slide bars 22 on the side away from the handle pull ring 13. The cable fixing piece 24 is an "L"-shaped plastic piece. The shorter part of the cable fixing piece 24 is fixed to the slide bar 22, and a circular mounting hole is opened on the longer part of the cable fixing piece 24. The cable 408 is fixed at the circular mounting hole on the cable fixing piece 24. In this way, pulling the operating pull ring 2 can drive the cable 408 to move, thereby driving the plasma coil 5 to retract into the electrode rod 3.

[0062] like Figure 1 , 8 As shown in Figure 12, the main function of the electrode rod 3 is to install the plasma coil 5 and the electrode wire that carries the power supply of the plasma coil 5. The electrode rod 3 is an existing device that can be used directly. The electrode rod 3 includes a rod body 31, an electrode rod fixing ring 32, and a fixing groove 34. The electrode rod fixing ring 32 is located at one end of the rod body 31, and there are two electrode rod fixing rings 32 at this end. An annular groove is formed between the two electrode rod fixing rings 32. This groove is named the fixing groove 34.

[0063] The rod body 31 is a tube with a circular cross-section. Both ends of the rod body 31 are open. One end of the rod body 31 is installed on the operating handle 1. In order to facilitate fixing the rod body 31 to the operating handle 1, two spaced electrode rod fixing rings 32 are fixed at the fixed end of the rod body 31.

[0064] The electrode rod fixing ring 32 is a ring with a rectangular cross-section. The electrode rod fixing ring 32 is fixed to the outside of the rod body 1 with glue. Two electrode rod fixing rings 32 are fixed at one end of the rod body 31, and there is a gap between the two electrode rod fixing rings 32. The groove formed by this gap is called the fixing groove 34. The thickness of the fixing groove 34 is the same as the wall thickness of the operating handle 1. Through the electrode rod fixing ring 32 and the fixing groove 34, the rod body 31 can be locked at the end of the operating handle 1. After the electrode rod fixing ring 32 is locked into the operating handle, the outer side of the electrode rod fixing ring 32 contacts the inner side of the upper cover 11 and the lower cover 12 of the handle, ensuring the stability of the rod body 31 in the operating handle 1.

[0065] like Figure 1 , 6 As shown in Figures 7, 9, and 10, the plasma coil 5 includes a coil body 51, a bent portion 53, and a liquid guiding strip 52.

[0066] The ring body 51 is made of metal with certain strength and that meets medical standards. In this embodiment, Ti metal is preferred. The ring body 51 is bent into an open circle by a metal strip. In order to facilitate the shrinking of the ring body 51, a reinforced bending part 53 is made at the end of the ring body 51 away from the opening. There are two opposing bending parts 53 on the ring body 51. In this way, when the ring body 51 is shrinking, the ring body 51 can be bent and shrink into the tube body 31 along the bending part 53.

[0067] To facilitate complete encapsulation of the ring body 51 by physiological saline and to excite the plasma, a liquid guiding strip 52 is provided on the inner side of the ring body 51, which is arranged along the outline of the ring body 51. The liquid guiding strip 52 is integrally formed with the ring body 51, and the cross-section of the liquid guiding strip 52 is rectangular. In order to facilitate the flow of physiological saline along the liquid guiding strip 52, rectangular grooves are recessed perpendicular to the liquid guiding strip 52 on the upper and lower surfaces of the liquid guiding strip 52. These rectangular grooves are named liquid guiding grooves 54. Physiological saline can flow along the liquid guiding strip 52 and the liquid guiding groove 54 to cover the surface of the ring body 51, so as to facilitate stable plasma excitation.

[0068] To facilitate the removal of the cut tissue polyps, a mesh basket 6 is fixed to the lower surface of the coil 51. The mesh basket 6 is a mesh woven from a flexible material that meets medical standards. The open end of the mesh basket 6 is attached to the lower surface of the coil 51. The opening of the mesh basket 6 can close as the coil 51 contracts, which facilitates the removal of the absorbed tissue after cutting.

[0069] like Figure 9 , 10As shown in 11, 12 and 13, in order to facilitate the installation and retraction of the plasma coil 5, the plasma coil 5 is mounted on the electrode rod 3 via a coil retraction assembly 4. The coil retraction assembly 4 includes a coil fixing tube 401, a limiting tube 402 and a corrugated tube 403. The two ends of the opening of the coil body 51 are mounted on the coil fixing tube 401, which is inserted into the rod body 31. The limiting tube 402 is sleeved on the outside of the coil fixing tube 401. The corrugated tube 403 is mounted inside the rod body 31, and one end of the corrugated tube 403 is connected to the limiting tube 402.

[0070] The coil fixing tube 401 is a cylindrical tube with open ends. The two ends of the open end of the coil body 51 are welded to the outer surface of the coil fixing tube 401. The limiting tube 402 is a tube with open ends. The main function of the limiting tube 402 is to seal and insulate the coil body 51 installed on the coil fixing tube 401. The limiting tube 402 is sleeved on the outside of the coil fixing tube 401, and the outer diameter of the limiting tube 402 is slightly lower than the inner diameter of the rod body 31. The limiting tube 402 can move inside the rod body 31.

[0071] At the end of the coil fixing tube 401 away from the rod, there are two rectangular fixing blocks protruding outward perpendicular to the inner wall of the coil fixing tube 401, and a circular through hole is opened on each fixing block. The two fixing blocks are distributed opposite each other. This fixing block is named the pull rope fixing end 405. The pull rope 408 can be fixed on the pull rope fixing end 405.

[0072] The corrugated tube 403 is a tube with a circular cross-section. The corrugated tube 403 is telescopic. One end of the corrugated tube 403 is connected to the electric coil fixing tube 401 by glue. The outer diameter of the corrugated tube 403 is the same as the outer diameter of the electric coil fixing tube 401. By pulling the rope 408, the electric coil fixing tube 401 can be pulled into the rod body 31, thereby completing the contraction of the plasma electric coil 5. At this time, the corrugated tube 403 is compressed by force.

[0073] To facilitate the installation of the bellows 403, two circular through holes are made perpendicular to the surface of the rod 31 on the outer side of the rod 31. These through holes are named limiting ring fixing holes 410. At the same time, a circular ring is placed inside the rod 31. This ring is named the second limiting ring 407. A threaded hole is opened on the surface of the second limiting ring 407. The second limiting ring 407 is fixed inside the rod 31 by screws and the limiting ring fixing holes 410. In addition, the inner diameter of the second limiting ring 407 is slightly larger than the inner diameter of the bellows 403.

[0074] To facilitate the reset of the coil fixing tube 401, a circular ring protrudes from the outer side of the end of the bellows 403 connected to the coil fixing tube 401. This ring is named the first limiting ring 406. At the same time, a spring is fitted on the outside of the bellows 403. This spring is named the reset spring 409. One end of the reset spring 409 abuts against the first limiting ring 406, and the other end abuts against the second limiting ring 407. When the bellows 403 contracts, the reset spring 409 is compressed. When the force applied to the bellows 403 is released, the bellows 403 resets under the action of the reset spring 409.

[0075] To seal the opening of the coil fixing tube 401 and prevent saline solution from flowing into the rod body 31, a cap 406 is inserted into the opening of the coil fixing tube 401 near the outside. The cap 406 seals the opening of the coil fixing tube 401, preventing saline solution from flowing into the rod body 31. In addition, to facilitate the installation of the inlet pipe 33, an installation hole is provided on the cap 406. After the inlet pipe 33 is installed into the cap 406, the connection is sealed with sealant. At the same time, sealant is also applied to the contact area between the corrugated pipe 403 and the second limiting ring 407. This effectively prevents saline solution from flowing into the rod body 31.

[0076] In addition, to facilitate the supply of saline solution to the ring 51, a water inlet pipe 33 is placed inside the rod 30. One end of the water inlet pipe 33 is connected to an external water supply device via a cable 7, and the other end is connected to two sub-water inlet pipes 35. The two sub-water inlet pipes 35 are glued to the liquid guide tank 54 to continuously supply saline solution to the ring 51. In addition, to ensure that the saline solution completely covers the outside of the ring 51, two water inlet pipes 33 are provided, and the two water inlet pipes 33 are located at both ends of the ring 51.

[0077] like Figure 6 As shown, in order to facilitate coagulation of the excised site, a coagulation electrode 8 is fixed on one end of the plasma coil 5 away from the coil fixing tube 401. The coagulation electrode 8 includes an electrode head 81 and an electrode coating 82. The electrode coating 82 is disposed on the plasma coil 5, and the electrode head 81 is fixed inside the electrode coating 82 and located at the end of the electrode coating 82. A portion of the electrode head 81 extends out of the electrode coating 82.

[0078] The electrode coating 82 is made of heat-resistant plastic that meets medical material standards. One end of the electrode coating 82 is fixed to the plasma coil 5. The fixing between the two is existing technology. There is a groove in the end of the electrode coating 82. The electrode head 81 is placed in this groove and is connected to the cable 7 through a wire. When it is necessary to coagulate the tissue, the switch of the coagulation electrode 8 is turned on. At this time, the electrode head 81 heats up. By controlling the electrode head 81 to adhere to the bleeding site, coagulation can be achieved at the bleeding site.

[0079] like Figure 1 and 2 As shown, the specific steps for using a plasma snare device under hysteroscopy include the following:

[0080] S1: Equipment connection: Connect the cable 7 on the operating handle 1 to the external equipment, wherein the power supply line in the cable 7 is connected to the power supply equipment, and the water inlet pipe 33 is connected to the saline supply device. Through the saline supply device and the water inlet pipe 33, saline can be continuously supplied to the plasma coil 5.

[0081] S2: Equipment insertion pretreatment: Store the plasma coil 5 inside the electrode rod 3. The operation method is to place the thumb inside the handle pull ring 13, and the index and middle fingers inside the pull ring 23 of the operating pull ring 2, and then squeeze them together. At this time, the operating pull ring 2 slides on the operating handle 1. At this time, under the action of the pull rope 408, the coil body 51 in the plasma coil 5 bends along the bending part 53 and is pulled into the rod body 31. At this time, the bellows 403 and the return spring 409 are compressed by force.

[0082] S3: Device insertion: Under the action of hysteroscopy, the head of electrode rod 3 is inserted into the patient's affected area;

[0083] S4: Tissue Removal: Release the operating pull ring 2. At this time, the bellows 403 is reset under the action of the reset spring 409, which in turn drives the plasma coil 5 to extend from the rod 31. At this time, the plasma coil 5 is in the shape of a ring. Then, put the plasma coil 5 on the outside of the tissue to be removed, turn on the equipment switch, and the water inlet pipe 33 starts to continuously supply physiological saline to the plasma coil 5. Then, the plasma is excited and the plasma is used to remove the tissue at the affected area.

[0084] S5: Tissue Removal: The removed tissue is scooped up using the basket 6 on the ion coil 5, and the ion coil 5 is collected using the coil collection assembly 4. The plasma coil 5 is then stored inside the electrode rod 3. The operation method is as follows: place the thumb inside the handle pull ring 13, and the index and middle fingers inside the pull ring 23 of the operating pull ring 2, and then pinch them together. At this time, the operating pull ring 2 slides on the operating handle 1. Under the action of the pull rope 408, the coil body 51 in the plasma coil 5 bends along the bending part 53 and is collected inside the rod body 31, thus closing the opening of the basket 6. Then, the electrode rod 3 is removed from the human body, thereby completing the removal of the removed tissue.

[0085] S6: Coagulation at the excision site: When coagulation is required, first turn on the power supply of the coagulation electrode 8. At this time, the electrode head 81 heats up. Then, place the electrode head 81 of the coagulation electrode 8 against the site to be coagulated and use the temperature generated by the electrode head 81 to coagulate the site.

[0086] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A hysteroscopic plasma snare device, characterized in that: The device includes an operating handle (1), an operating pull ring (2), an electrode rod (3), a plasma coil (5), a basket (6), and a coagulation electrode (8). The operating pull ring (2) is movably fitted onto the operating handle (1). The electrode rod (3) is located at one end of the operating handle (1). The plasma coil (5) for tissue removal is located at one end of the electrode rod (3). The plasma coil (5) is controllably constricted within the electrode rod (3) via the operating pull ring (2) and a coil constriction assembly (4) connected to the operating pull ring (2). The basket (6) for removing the removed tissue is located on the plasma coil (5). The basket (6) tightens its opening as the plasma coil (5) is constricted. The coagulation electrode (8) is located at the end of the plasma coil (5). The coagulation electrode (8) can controllably coagulate the tissue removal site. The plasma coil (5) includes a coil body (51), which is located at the end of the electrode rod (3). A liquid guide strip (52) is provided on the inner side of the coil body (51), and an inlet pipe (33) for supplying physiological saline is provided on the liquid guide strip (52). A liquid guiding groove (54) is recessed on the upper and lower surfaces of the liquid guiding strip (52), and the physiological saline supplied by the water inlet pipe (33) flows through the liquid guiding groove (54) to the entire ring body (51). A bending portion (53) is provided on the ring body (51). The bending portion (53) is located at one end of the ring body (51) away from the electrode rod (3). The ring body (51) is constricted within the electrode rod (3) along the bending portion (53).

2. The hysteroscopic plasma snare device according to claim 1, characterized in that: The electrode rod (3) includes a rod body (31), an electrode rod fixing ring (32), and a water inlet pipe (33). The electrode rod fixing ring (32) is located at one end of the rod body (31). The rod body (31) is mounted on the operating handle (1) through the electrode rod fixing ring (32). The water inlet pipe (33) for supplying physiological saline to the plasma coil (5) is located inside the rod body (31). One end of the water inlet pipe (33) is connected to the plasma coil (5), and the other end is connected to the external water supply end through the operating handle (1).

3. The hysteroscopic plasma snare device according to claim 1, characterized in that: The plasma coil converging assembly (4) includes a plasma coil fixing tube (401), a limiting tube (402), and a bellows tube (403). The bellows tube (403) is disposed inside the electrode rod (3), and one end of the bellows tube (403) is detachably and fixedly connected to the electrode rod (3). The plasma coil fixing tube (401) for mounting the plasma coil (5) is disposed at the other end of the bellows tube (403). The limiting tube (402) for fixing and limiting the plasma coil (5) disposed on the plasma coil fixing tube (401) is sleeved on the outside of the plasma coil fixing tube (401).

4. The hysteroscopic plasma snare device according to claim 3, characterized in that: A pull rope fixing end (405) for installing a pull rope (408) is provided on the electric coil fixing tube (401). The electric coil fixing tube (401) retracts into the rod body (31) under the action of the pull rope (408), while the corrugated tube (403) is compressed by force.

5. The hysteroscopic plasma snare device according to claim 3, characterized in that: A reset spring (409) is fitted on the outside of the bellows (403). The bellows (403) can be controlled to reset under the action of the reset spring (409) after shrinking.

6. The hysteroscopic plasma snare device according to claim 1, characterized in that: The coagulation electrode (8) includes an electrode head (81) and an electrode coating (82). The electrode coating (82) is located at the end of the ring body (51), and the electrode head (81) is located inside the electrode coating (82). The working surface of the electrode head (81) protrudes from the surface of the electrode coating (82).

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