Novel bipolar electric snare

Abstract

The novel bipolar electric snare comprises a slip ring, an inner sheath tube, an outer sheath tube, a large reed and an electrode plug, the outer sheath tube is sleeved on the inner sheath tube, one end of the outer sheath tube close to a snare electrode is provided with a fixed terminal, and one end of the fixed terminal away from the snare electrode is connected with a loop electrode ring. A loop electrode wire is arranged in the loop electrode ring in the length direction of the loop electrode ring, the large reed is electrically connected with the loop electrode wire, the lower end of the electrode plug is connected with a small reed in a pressing mode, the inhaul cable transversely penetrates through the small reed, and the small reed is electrically connected with the inhaul cable. The electrode plug is connected with the inhaul cable, so that when high-frequency and high-voltage current of a main machine is in contact with a human body through the snare electrode, the current generates a heat effect at the tissue to heat the tissue, separation and solidification of the tissue of the human body are achieved, and the purposes of cutting and hemostasis are achieved. High-frequency and high-voltage current flows back to the main machine through the fixed terminal, the loop electrode ring, the loop electrode wire and the large reed to form a closed loop.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a novel bipolar electric coil device. Background Technology

[0002] Electric snares are commonly used medical devices for endoscopic surgeries such as gastrointestinal polyp removal. Their application is widespread and classic, and through continuous development, the materials and manufacturing processes of snares have been improved. To meet the needs of endoscopists, the types of snares have also become more diverse. For example, a snare for easily removing large lesions is used in polyp removal (requiring a transparent cap), a process known as EMRC. Another method is EMRL, using a ligation technique for polyp removal, where the polyp is removed in sections, known as EPMR.

[0003] Existing electrosurgical snare devices are primarily monopolar, with a basic structure of: a sliding ring attached to a tubular handle; the front end of the handle is fixedly connected to the rear end of a flexible sheath; the ring is connected to both ends of an electrically conductive elastic metal wire forming the loop; the loop end of the elastic wire extends from the tubular handle to the front end of the flexible sheath. During polyp removal, the flexible sheath is inserted into the affected area via the endoscopic forceps. As the ring moves forward relative to the handle, the loop end of the elastic wire extends from the front end of the flexible sheath and automatically forms a snare under elastic expansion. Using endoscopy, the snare is placed over the polyp, and the ring is gradually moved backward relative to the handle, causing the snare to gradually shrink until it is tightly fitted over the polyp. Then, the elastic wire is electrically heated, causing the polyp to coagulate and be removed from the normal tissue. The removed polyp must be retrieved for pathological examination. After removal, the polyp detaches from the digestive tract wall and falls into the digestive tract. At this point, the electric snare in the endoscope forceps channel needs to be removed, and other endoscope accessories, such as grasping forceps, net bags, and baskets, should be inserted through the forceps channel to locate and clamp the rolled-off polyp. Then, the polyp, along with the endoscope, should be withdrawn from the body.

[0004] The monopolar electric snare requires connection to a negative electrode plate, which increases the complexity of surgical preparation and prolongs the preparation time. The monopolar electric snare uses the working electrode as one pole and the human body as the other pole. The current flows through the human body, and the contact area between the electrode and the human body is instantly heated, resulting in significant thermal damage that may affect adjacent organs and tissues. Furthermore, it relies on an external conductive medium, which is prone to interruption of conductivity due to insufficient medium or circuit failure, affecting the stability of the surgery and even leading to surgical failure. The electrode structure and current path are also unreasonable, which can easily cause "residual incisions" in the tissue, leading to bleeding, increasing surgical risks and patient recovery time.

[0005] In view of this, the present invention is proposed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to provide a novel bipolar electric coil device to solve the above-mentioned technical problems.

[0007] The technical solution of this utility model is: a novel bipolar electric coil device, comprising:

[0008] A slip ring, with a cable inside the slip ring, the cable being arranged laterally, and a loop electrode being connected to the end of the cable away from the slip ring;

[0009] Inner sheath, which is fitted onto the cable;

[0010] An outer sheath is fitted onto an inner sheath. A fixed terminal is provided at the end of the outer sheath near the snare electrode. A loop electrode ring is connected to the end of the fixed terminal away from the snare electrode. A loop electrode wire is provided inside the loop electrode ring along its length.

[0011] The large reed is electrically connected to the circuit electrode wire;

[0012] The electrode plug has a small spring clip crimped to its lower end. The pull cable passes horizontally through the small spring clip, and the small spring clip is electrically connected to the pull cable.

[0013] Furthermore, a protective sleeve is fitted on the end of the outer sheath away from the snare electrode, and a first connector is connected to the end of the protective sleeve away from the snare electrode. A through hole is opened in the center of the first connector, and the end of the outer sheath is bonded to the left end of the through hole. The inner sheath passes through the through hole, and the protective sleeve is heat-shrinkably connected to the first connector.

[0014] Furthermore, the first connector is connected to a second connector at the end opposite to the protective sleeve, and the small spring, the large spring, and the electrode plug are all located inside the second connector;

[0015] The second connector has a horizontally opening for a connection hole. The inner sheath is connected to the left end of the connection hole, and a sealing ring is provided at the connection point.

[0016] Furthermore, the inner and outer sheaths have cavities, and a water injection port is connected to the first connector. The water injection port is used to inject conductive medium or water into the pathological site through the cavity.

[0017] Furthermore, the second connector has a handle connected to the end opposite to the first connector, and a sliding ring is fitted on the handle, which is connected to the cable.

[0018] Furthermore, a limit block is fixedly installed at one end of the handle near the second connector, and the limit block is detachably connected to the slip ring.

[0019] Furthermore, the loop electrode and the cable are crimped together via a crimping pipe.

[0020] Furthermore, a booster tube is fitted onto the cable, extending from the slip ring into the protective sleeve. The booster tube is electrically connected to the cable and to the small spring.

[0021] Furthermore, the loop electrode is elliptical or hexagonal.

[0022] By adopting the above technical solution, this utility model has the following beneficial effects:

[0023] 1. By connecting the electrode plug to the cable, the high-frequency high-voltage current of the main unit comes into contact with the body through the loop electrode. The current generates a thermal effect at the tissue, heating the tissue and achieving separation and coagulation of the body tissue, thereby achieving the purpose of cutting and hemostasis.

[0024] 2. The high-frequency high-voltage current flows back to the main unit through the fixed terminal, the loop electrode ring, the loop electrode wire and the large spring, forming a closed loop. Compared with the monopolar electric snare, the bipolar design does not require a negative plate connection, which can simplify the surgical procedure, reduce the surgical preparation time, and require fewer connecting parts, making the operation simpler and easier to operate in narrow or complex surgical environments. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of the novel bipolar electric coil provided in this embodiment of the application;

[0027] Figure 2 for Figure 1 A sectional view;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view at point B in the middle;

[0030] Figure 5 for Figure 2 Enlarged view at point C;

[0031] Figure 6 for Figure 2 Enlarged view of point D in the middle.

[0032] Reference numerals: 1. Loop electrode; 2. First connector; 3. Second connector; 4. Limiting block; 5. Handle; 6. Slip ring; 7. Inner sheath; 8. Outer sheath; 9. Fixed terminal; 10. Press-fit tube; 11. Return electrode ring; 12. Return electrode wire; 13. Cable; 14. Push tube; 15. Protective sleeve; 16. Sealing ring; 17. Small spring; 18. Large spring; 19. Electrode plug.

[0033] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in further detail with reference to the accompanying drawings.

[0035] See Figures 1 to 6 As shown, this application provides a novel bipolar electric snare device, comprising: a slip ring 6, an inner sheath 7, an outer sheath 8, a large spring 18, and an electrode plug 19. A pull cable 13 is disposed inside the slip ring 6, and the pull cable 13 is arranged laterally. The end of the pull cable 13 facing away from the slip ring 6 is connected to a snare electrode 1. The inner sheath 7 is sleeved on the pull cable 13, and the outer sheath 8 is sleeved on the inner sheath 7. A fixed terminal 9 is disposed at the end of the outer sheath 8 near the snare electrode 1. A return electrode ring 11 is connected to the end of the fixed terminal 9 facing away from the snare electrode 1. 1. The inner sheath tube 7 is press-fitted with the circuit electrode ring 11 and the fixed terminal 9 are laser welded and fixed. The outer circumference of the fixed terminal 9 has a barb structure, which is fixedly connected to the outer sheath tube 8 through the barb structure to enhance the fixing strength between the outer sheath tube 8 and the fixed terminal 9 and prevent loosening during use. The circuit electrode ring 11 is provided with a circuit electrode wire 12 along its length. The large spring 18 is electrically connected to the circuit electrode wire 12. The lower end of the electrode plug 19 is pressed with a small spring 17. The pull cable 13 passes through the small spring 17 laterally and is electrically connected to the pull cable 13.

[0036] In the above scheme, the electrode plug 19 is connected to the cable 13, so that when the high-frequency high-voltage current of the host comes into contact with the body through the snare electrode 1, the current generates a thermal effect at the tissue, heating the tissue and achieving separation and coagulation of the body tissue, thereby achieving the purpose of cutting and hemostasis. Then, the high-frequency high-voltage current flows back to the host through the fixed terminal 9, the return electrode ring 11, the return electrode wire 12 and the large spring 18, forming a closed circuit. Compared with the monopolar electric snare device, the bipolar design does not require the negative electrode plate connection, which can simplify the surgical operation process, reduce the surgical preparation time, and require fewer connecting parts, making the operation simpler and easier to operate in narrow or complex surgical environments. It also reduces the phenomenon of "residual incision" caused by tissue involvement in traditional methods and reduces bleeding caused by "residual incision".

[0037] See some possible implementations. Figure 2 and Figure 4 As shown, a protective sleeve 15 is fitted onto the end of the outer sheath tube 8 facing away from the loop electrode 1. The end of the protective sleeve 15 facing away from the loop electrode 1 is connected to a first connector 2. A through hole is opened in the center of the first connector 2, and the end of the outer sheath tube 8 is glued to the left end of the through hole. The inner sheath tube 7 passes through the through hole. The protective sleeve 15 is heat-shrink connected to the first connector 2. The protective sleeve 15 is used to protect the inner sheath tube 7, the cable 13, and the circuit electrode wire 12 inside the outer sheath tube 8, so as to avoid damage to the circuit caused by external force, thereby ensuring the stability of the circuit.

[0038] See some possible implementations. Figure 3 and Figure 5 As shown, the first connector 2 is connected to the second connector 3 at the end opposite to the protective sleeve 15. The small spring 17, the large spring 18 and the electrode plug 19 are all located inside the second connector 3. A connection hole is opened laterally inside the second connector 3. The inner sheath 7 is connected to the left end of the connection hole, and a sealing ring 16 is provided at the connection.

[0039] In the above scheme, by connecting the inner sheath tube 7 to the connection hole of the second connector 3 and sealing the connection with the sealing ring 16, the space between the inner sheath tube 7 and the perforation is sealed, preventing the conductive medium or water flowing through the first connector 2 from flowing into the second connector 3.

[0040] See some possible implementations. Figures 1 to 4 As shown, the inner sheath 7 and the outer sheath 8 have cavities. The first connector 2 is connected to a water injection port, which is used to inject conductive medium or water into the pathological site through the cavity. The conductive medium is injected into the first connector 2 through the water injection port. The conductive medium flows into the tissue through the cavity, which facilitates the electrical connection between the current and the fixed terminal 9, ensuring that the circuit at the tissue site remains continuous and the current density is constant, thus improving the stability and reliability of the surgery. When it is necessary to rinse the tissue site, water is injected into the first connector 2 through the water injection port. The water flows into the tissue through the cavity to rinse the tissue, prevent adhesion, and also cool it down.

[0041] See some possible implementations. Figures 1 to 6 As shown, the second connector 3 is connected to a handle 5 at the end opposite to the first connector 2. A sliding ring 6 is fitted on the handle 5. The sliding ring 6 is connected to the pull cable 13. The handle 5 can rotate 360° to facilitate the adjustment of the angle of the loop electrode 1, so that it fits the tissue better and improves the ease of operation.

[0042] In the above scheme, when cutting / coagulating the tissue, the slip ring 6 is pushed to move closer to the first connector 2, so that the slip ring 6 slides through the cable 13 to drive the loop electrode 1 to slide out of the inner sheath tube 7, forming a loop. When the slip ring 6 moves away from the first connector 2, the loop gradually shrinks, thereby tightening the polyp. It can be used to cut / coagulate the tissue, thereby achieving the purpose of cutting and hemostasis.

[0043] See some possible implementations. Figure 1 and Figure 2 As shown, a limiting block 4 is fixedly installed at one end of the handle 5 near the second connector 3. The limiting block 4 is detachably connected to the slip ring 6. The limiting block 4 is used to limit the sliding distance of the slip ring 6 to prevent the slip ring 6 from sliding too far and causing the loop electrode 1 to be difficult to retract.

[0044] See some possible implementations. Figure 3 As shown, the loop electrode 1 and the cable 13 are crimped together by the crimping tube 10. The crimping tube 10 is used to crimp and fix the loop electrode 1 and the cable 13 to ensure a stable connection between the loop electrode 1 and the cable 13 and to avoid interruption of current conduction.

[0045] See some possible implementations. Figures 2 to 4 As shown, a booster tube 14 is fitted onto the cable 13. The booster tube 14 extends from the slip ring 6 into the protective sleeve 15. The booster tube 14 is electrically connected to the cable 13 and to the small spring 17. The booster tube 14 is riveted to the cable 13 to enhance the mechanical strength of the cable 13, assist the slip ring 6 in exerting traction on the cable 13, and ensure that the opening and closing action of the collar is accurate and stable.

[0046] In some possible implementations, the snare electrode 1 is elliptical or hexagonal to accommodate lesions of different shapes and sizes (such as gastrointestinal polyps), thereby improving the flexibility and adaptability of the snare.

[0047] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A novel bipolar electric coil device, characterized in that, include: Slip ring (6), a cable (13) is provided inside the slip ring (6), the cable (13) is arranged laterally, and a loop electrode (1) is connected to one end of the cable (13) away from the slip ring (6). Inner sheath (7), the inner sheath (7) is sleeved on the cable (13); An outer sheath (8) is sleeved on the inner sheath (7). A fixed terminal (9) is provided at one end of the outer sheath (8) near the snare electrode (1). A loop electrode ring (11) is connected to the end of the fixed terminal (9) away from the snare electrode (1). A loop electrode wire (12) is provided inside the loop electrode ring (11) along its length. Large reed (18), which is electrically connected to the circuit electrode wire (12); Electrode plug (19), with a small spring (17) pressed into the lower end of the electrode plug (19), and the cable (13) passing through the small spring (17) laterally, and the small spring (17) being electrically connected to the cable (13).

2. The novel bipolar electric coil device according to claim 1, characterized in that, The outer sheath (8) is fitted with a protective sleeve (15) at one end away from the snare electrode (1). The protective sleeve (15) is connected to a first connector (2) at one end away from the snare electrode (1). The first connector (2) has a through hole in its center, and the end of the outer sheath (8) is bonded to the left end of the through hole. The inner sheath (7) passes through the through hole. The protective sleeve (15) is heat-shrinkably connected to the first connector (2).

3. The novel bipolar electric coil device according to claim 2, characterized in that, The first connector (2) is connected to a second connector (3) at the end away from the protective sleeve (15). The small spring (17), the large spring (18) and the electrode plug (19) are all located inside the second connector (3). The second connector (3) has a horizontally opened connection hole, the inner sheath (7) is connected to the left end of the connection hole, and a sealing ring (16) is provided at the connection.

4. The novel bipolar electric coil device according to claim 3, characterized in that, The inner sheath (7) and the outer sheath (8) have cavities, and the first connector (2) is connected to a water injection port, which is used to inject conductive medium or water into the pathological site through the cavity.

5. The novel bipolar electric coil device according to claim 3, characterized in that, The second connector (3) is connected to a handle (5) at the end opposite to the first connector (2). A sliding ring (6) is fitted on the handle (5), and the sliding ring (6) is connected to the cable (13).

6. The novel bipolar electric coil device according to claim 5, characterized in that, A limiting block (4) is fixedly provided at one end of the handle (5) near the second connector (3), and the limiting block (4) is detachably connected to the slip ring (6).

7. The novel bipolar electric coil device according to claim 5, characterized in that, The loop electrode (1) and the cable (13) are crimped together by a crimping tube (10).

8. The novel bipolar electric coil device according to claim 7, characterized in that, A booster tube (14) is fitted on the cable (13). The booster tube (14) extends from the slip ring (6) into the protective sleeve (15). The booster tube (14) is electrically connected to the cable (13) and to the small spring (17).

9. The novel bipolar electric coil holder according to claim 7, characterized in that, The loop electrode (1) is elliptical or hexagonal.

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