Electrode structure and resectoscope

Abstract

The invention relates to the technical field of resectoscopes, and discloses an electrode structure and a resectoscope, the electrode structure comprises an electrode stem, a binding post arranged at one end of the electrode stem, an electric resection ring arranged at one end, far away from the binding post, of the electrode stem, and a sealing assembly arranged on the outer wall of the electrode stem; the sealing assembly comprises a mounting cylinder and a sealing seat detachably mounted on the mounting cylinder, the sealing seat is provided with a first hole allowing an endoscope to penetrate through and a second hole allowing the electrode rod to penetrate through, and the mounting cylinder is provided with penetrating holes corresponding to the first hole and the second hole; the sealing seat is composed of two splicing blocks, and the first hole and the second hole are divided by the abutting faces of the two splicing blocks. And when the electrode stem slides, the sealing ring can slide in the second section. The device has the effect that the electrode rod is convenient to replace.

Description

Technical Field

[0001] The present application relates to the technical field of resectoscopes, and in particular to an electrode structure and a resectoscope. Background Art

[0002] The resectoscope is an advanced medical device, mainly used in surgical fields such as urology, which uses the heat energy generated by high-frequency current to achieve precise tissue cutting and hemostasis. During the operation, the doctor can control the movement of the electric cutting ring through the operating handle and use the electric cutting ring to perform cutting and coagulation operations. At the same time, the perfusion system can keep the surgical field clear.

[0003] The existing Chinese invention patent document with application publication number CN105250023A discloses an electric resectoscope, which mainly includes an electrode body, a sealing plug installed on the outer wall of the electrode body and a terminal. The end of the electrode body includes a semi-annular positive electrode, which is an electric cutting ring for cutting. The other end of the electrode is connected to the terminal, and the terminal is installed on a slider in the working element. By driving the slider to slide, the electrode body can be driven to slide along the length direction, thereby driving the electric cutting ring to move.

[0004] At present, in order to meet diverse surgical needs, multiple electrode bodies with different shapes of electric cutting rings are usually equipped. The electrode body can be detachably installed on the working element, and different electrode bodies are selected according to the surgical situation. In the current technical solution, the endoscope and the electrode body pass through the sealing plug and achieve sealing, and the electrode body can slide on the sealing plug during operation. When replacing the electrode body, it is necessary to separate the electrode body and the terminal and then slide it out of the sealing plug to replace the electrode body of other structures. In order to achieve a good sealing effect, the sealing plug has a certain wrapping force with the electrode body, which makes the replacement of the electrode body more laborious. Summary of the invention

[0005] In a first aspect, the present application provides an electrode structure.

[0006] This application adopts the following technical solutions: An electrode structure comprises an electrode rod, a terminal arranged at one end of the electrode rod, an electric cutting ring arranged at an end of the electrode rod away from the terminal, and a sealing assembly arranged on the outer wall of the electrode rod; the sealing assembly comprises a mounting tube and a sealing seat detachably mounted on the mounting tube, the sealing seat is provided with a first hole for an endoscope to pass through and a second hole for the electrode rod to pass through, and the mounting tube is provided with through holes corresponding to the first hole and the second hole; the sealing seat is composed of two splicing blocks, and the first hole and the second hole are divided by abutting surfaces of the two splicing blocks; the second hole has a first section and a second section, the inner diameter of the second section is larger than the inner diameter of the first section, so that a step edge is formed between the first section and the second section, the outer wall of the electrode rod is provided with a sealing ring, and an elastic sleeve is provided between the sealing ring and the step edge, when the electrode rod slides, the sealing ring can slide in the second section.

[0007] By adopting the above technical solution, the sealing seat can be detachably installed on the installation tube, and the sealing seat has a half-spliced ​​structure. The spliced ​​block is clamped on the electrode rod and then installed on the installation tube, so that the electrode rod does not need to pass through the sealing seat, which is more convenient to install and reduces the wear caused by the plug-in installation method. The outer wall of the electrode rod is also provided with a sealing ring, which is located in the second section, and there is an elastic sleeve between the sealing ring and the step edge. The elastic sleeve can seal the space between the step edge and the sealing ring, and when the electrode rod is driven to slide, the sealing ring can slide in the second section, thereby ensuring the sealing effect while greatly reducing the friction force on the electrode rod when it slides. Multiple electrode rods equipped with electric cutting rings of different structures can be provided, and the outer wall of each electrode rod is installed with a sealing ring, so when the electrode rod is replaced, there is no need to disassemble and reinstall the sealing ring.

[0008] Optionally, the sealing assembly includes a connecting ring, which is sleeved on the outer wall of the sealing seat, and the outer wall of the sealing seat is provided with a resistance piece, the connecting ring is threadedly connected to the inner wall of the mounting tube, and the end of the connecting ring abuts against the resistance piece to drive the sealing seat to move into the mounting tube.

[0009] By adopting the above technical solution, the connecting ring is sleeved on the outer wall of the sealing seat, and the end of the connecting ring abuts against the abutment. When the connecting ring is threadedly connected to the mounting tube, the sealing seat can be driven to slide into the mounting tube, and at this time the two splicing blocks abut together to form the entire sealing seat.

[0010] Optionally, the resistance member includes a resistance column detachably arranged on the side wall of the assembly block.

[0011] By adopting the above technical solution, the abutment column can be detachably connected to the splicing block, and the installation and disassembly of the abutment column can be facilitated by means of snap connection, threaded connection, plug-in connection, etc.

[0012] Optionally, one of the splicing blocks is provided with a plug-in column, and the other splicing block is provided with a plug-in groove for the plug-in column to be plugged in.

[0013] By adopting the above technical solution, the stability of the two splicing blocks when spliced ​​together is improved, thereby improving the sealing effect of the endoscope and the electrode rod.

[0014] Optionally, the mounting tube is composed of two blocks, wherein a limit strip is provided on the side wall of one of the blocks, and a limit groove for the limit strip to be engaged with the side wall of the other block. When the two blocks form the mounting tube, the limit strip and the limit groove are engaged with each other.

[0015] By adopting the above technical solution, the installation tube is composed of two blocks, so when replacing and installing, the installation tube can be disassembled, thereby facilitating the installation and disassembly of the electrode rod.

[0016] Optionally, the outer diameter of the sealing ring is smaller than the inner diameter of the second hole, one end of the elastic sleeve is connected to the side of the sealing ring facing the step edge, the other end of the elastic sleeve is provided with a clamping ring, and the step edge is provided with a connecting groove for the clamping ring to be clamped.

[0017] By adopting the above technical solution, one end of the elastic sleeve is connected to the sealing ring, and the other end is connected by clamping the connecting ring in the connecting groove, thereby fixing one end of the elastic sleeve, and the clamping method of the connecting ring and the connecting groove is also convenient for installation and disassembly.

[0018] Optionally, a first ring edge is provided on the side of the step edge facing the sealing ring, a first inclined surface is provided on the side of the first ring edge close to the electrode rod, the distance between the first inclined surface and the electrode rod gradually increases towards the direction close to the sealing ring, and when the sealing ring moves towards the step edge, the sealing ring can abut against the first ring edge.

[0019] By adopting the above technical solution, when the electrode rod needs to continue to slide outward, the sealing ring abuts against the first ring edge and can cause the first ring edge to expand outward, thereby reducing the resistance of the first section to the electrode rod and facilitating the operator to push the electrode rod.

[0020] Optionally, a second inclined surface is provided on the side of the sealing ring facing away from the step edge, and the distance between the second inclined surface and the electrode rod gradually increases in the direction away from the step edge. A resistance ring is provided on the inner wall of the mounting tube, and when the sealing ring moves toward the inner end surface of the mounting tube, the resistance ring can abut against the second inclined surface.

[0021] By adopting the above technical solution, when the electrode rod moves back to reset, the sealing ring can abut against the inner end surface of the mounting tube, and the resistance ring can abut against the end surface of the sealing ring. Under the action of the resistance ring, the sealing ring can be opened outward to a certain extent, making the electrode rod easier to slide, thereby improving the operability of the operator.

[0022] In a second aspect, the present application provides an electroresectoscope.

[0023] An electric resectoscope comprises the electrode structure in the above scheme.

[0024] By adopting the above technical solution and the electrode structure in the above solution, the replacement of the electrode rod is made more convenient, and during operation, while ensuring the sealing effect, the resistance encountered by the electrode rod when sliding can be reduced, making it easier for staff to operate.

[0025] In summary, the present application includes at least one of the following beneficial effects: 1. The sealing seat is composed of two splicing blocks to be clamped on the outer wall of the electrode rod. Therefore, when replacing the electrode rod, the splicing block can be removed, which overcomes the traditional plug-in replacement method; 2. An elastic sleeve is arranged between the sealing ring and the step edge, which further improves the sealing performance between the sealing ring and the step edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a schematic diagram of a needle electrosurgical resection loop; Figure 3 It is a schematic diagram of a mushroom-shaped electrosurgical resection loop; Figure 4 It is a schematic diagram of a spherical electrosurgical resection loop; Figure 5 is a schematic diagram of the sealing assembly in Example 1 of the present application; Figure 6 is an explosion diagram of Example 1 of the present application; Figure 7 is a cross-sectional schematic diagram of Example 1 of the present application; Figure 8 yes Figure 7 A magnified schematic diagram of center A.

[0027] Explanation of the reference numerals in the accompanying drawings: 101, electrode rod; 102, endoscope; 2, terminal post; 3, electric cutting ring; 4, sealing assembly; 41, mounting tube; 411, block; 42, sealing seat; 421, splicing block; 43, connecting ring; 5, first hole; 6, second hole; 61, first section; 62, second section; 7, perforation; 8, step edge; 9, sealing ring; 10, elastic sleeve; 11, abutment; 12, plug-in post; 13, plug-in groove; 14, snap-on ring; 15, connecting groove; 16, first ring edge; 17, first inclined surface; 18, second inclined surface; 19, abutment ring; 20, limit strip; 21, limit groove. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 8 This application is described in further detail. Example

[0029] The present application embodiment discloses an electrode structure. Figure 1 The electrode structure includes an electrode rod 101, a terminal 2 arranged at one end of the electrode rod 101, an electrosurgical ring 3 arranged at the end of the electrode rod 101 away from the terminal 2, and a sealing component 4 installed on the outer wall of the electrode rod 101. The electrosurgical ring 3 is preferably made of a precious metal material. When the electrode structure is installed on the electrosurgical resectoscope, the sealing component 4 is used to seal the position between the inner sheath and the working handpiece, and the endoscope 102 and the electrode rod 101 both pass through the sealing component 4, and when in use, the electrode rod 101 can be driven by the working handpiece to slide on the sealing component 4, so that the electrosurgical ring 3 can be adjusted in position to perform cutting.

[0030] Reference Figure 1-Figure 4 In this embodiment, the electrode rod 101 is equipped with a plurality of electrodes, and the shape of the electric cutting ring 3 of each electrode rod 101 is different, for example, the electric cutting ring 3 is a ring structure, a needle structure, a mushroom head structure, and a rolling ball structure. According to the patient's condition, the electrode rod 101 is replaced with a different structure of the electric cutting ring 3 during the operation to better perform the cutting operation.

[0031] Reference Figure 1 and Figure 5The sealing assembly 4 includes a sealing seat 42 and a mounting tube 41, and the sealing seat 42 can be detachably mounted in the mounting tube 41. The sealing seat 42 is composed of two splicing blocks 421. The sealing seat 42 is provided with a first hole 5 and a second hole 6, the first hole 5 is used for the endoscope 102 to pass through, and the second hole 6 is used for the electrode rod 101 to pass through. The first hole 5 and the second hole 6 are distributed up and down, and are divided by the splicing surfaces of the two splicing blocks 421. The mounting tube 41 is correspondingly provided with a through hole 7 that matches the first hole 5 and the second hole 6, so that the endoscope 102 and the electrode rod 101 can pass through. And a sealing strip can be set on the inner wall of the through hole 7 to further improve the sealing of the connection.

[0032] The sealing assembly 4 also includes a connecting ring 43 sleeved on the outer wall of the sealing seat 42, and the connecting ring 43 can be threadedly connected to the inner wall of the installation tube 41. The end of the splicing block 421 close to the inner end surface of the installation tube 41 is installed with a resistance member 11. After the splicing blocks 421 are assembled into the sealing seat 42, the connecting ring 43 is sleeved on the outer wall of the sealing seat 42, and then the connecting ring 43 is connected to the inner wall of the installation tube 41, so that the connecting ring 43 can drive the sealing seat 42 to slide into the installation tube 41.

[0033] In a further embodiment, referring to Figure 5 and Figure 6 The abutment member 11 includes an abutment column detachably mounted on the splicing block 421. The abutment column is mounted on the splicing block 421 by plugging, threading, etc., and a portion of the abutment column exceeds the surface of the splicing block 421, so that the connecting ring 43 can abut against the abutment column. Furthermore, in order to improve the stability of the sealing seat 42, on one side of the splicing blocks 421 abutting against each other, a plug-in column 12 is provided on one of the splicing blocks 421, and a plug-in groove 13 is provided on the other splicing block 421. When the splicing blocks 421 abut against each other, the plug-in column 12 can be plugged into the plug-in groove 13, so that the splicing blocks 421 are not easy to slide relative to each other.

[0034] The installation tube 41 is composed of two blocks 411, and a limit strip 20 is fixed to the side wall of one of the blocks 411, and the cross section of the limit strip 20 is a dovetail structure. The other block 411 is provided with a limit groove 21 for the limit strip 20 to slide into and engage, thereby forming the installation tube 41, and under the action of the limit strip 20, the connection ring 43 is not easy to deviate when installed in the installation tube 41.

[0035] Reference Figure 5 and Figure 7The first hole 5 includes a first section 61 and a second section 62, and the first section 61 is located at the end of the sealing seat 42 away from the through hole 7. The aperture of the first section 61 is adapted to the outer diameter of the electrode rod 101, and is slightly smaller than the outer diameter of the electrode rod 101, so that the first section 61 can perform a good seal on the electrode rod 101, and the electrode rod 101 can slide when a force is applied. The second section 62 is located at the end of the sealing seat 42 close to the through hole 7, and the inner diameter of the second section 62 is larger than the inner diameter of the first section 61. A sealing ring 9 is provided on the outer wall of the electrode rod 101 at the position of the second section 62, and the outer diameter of the sealing ring 9 is smaller than the inner diameter of the second section 62, and larger than the inner diameter of the first section 61, so that there is a gap between the outer wall of the sealing ring 9 and the inner wall of the second section 62. The sealing ring 9 is sleeved on the outer wall of the electrode rod 101, and the electrode rod 101 and the sealing ring 9 can also slide relative to each other when a certain force is applied. A sealing ring 9 is provided on the outer wall of each electrode rod 101, and the sealing ring 9 does not need to be replaced during replacement.

[0036] A step edge 8 is formed at the junction of the first section 61 and the second section 62, and an elastic sleeve 10 is provided between the sealing ring 9 and the step edge 8, and the elastic sleeve 10 can seal the area between the first section 61 and the sealing ring 9. When the electrode rod 101 slides forward, the sealing ring 9 can slide in the second section 62, and in this process, the sliding of the electrode rod 101 is only resisted by the first section 61, so it is more convenient for people to push the sliding of the electrode rod 101, and under the action of the first section 61 and the elastic sleeve 10, a sufficient sealing effect can be maintained.

[0037] Combination Figure 8 One end of the elastic sleeve 10 is fixed to the end of the sealing ring 9 facing the step edge 8, and a clamping ring 14 is fixed to the other end of the elastic sleeve 10. A connecting groove 15 for clamping the clamping ring 14 is provided on the step edge 8. The cross section of the clamping ring 14 is a circular structure, and the connecting groove 15 is a structure larger than a semicircle, so that the clamping ring 14 can be clamped in the connecting groove 15.

[0038] In a further embodiment, a first ring edge 16 is fixed to one side of the step edge 8 facing the sealing ring 9, and a first inclined surface 17 is provided on the inner wall of the first ring edge 16, so that the distance between the first inclined surface 17 and the electrode rod 101 gradually increases in the direction approaching the sealing ring 9. When the sealing ring 9 slides in the direction approaching the step edge 8, the electrode rod 101 needs to continue to be pushed forward, and the sealing ring 9 contacts the first inclined surface 17, so that the first ring edge 16 pulls the inner wall of the first section 61, thereby reducing the acting force between the first section 61 and the electrode rod 101, so that the electrode rod 101 is easier to be pushed forward.

[0039] Reference Figure 7 and Figure 8, a second inclined surface 18 is provided on the side of the sealing ring 9 away from the step edge 8, and the distance between the second inclined surface 18 and the electrode rod 101 gradually increases in the direction away from the step edge 8. That is, when the electrode rod 101 slides back to drive the sealing ring 9 to move, the second inclined surface 18 can abut against the inner wall of the installation tube 41. A contact ring 19 is provided on the side of the inner wall of the installation tube 41 facing the second inclined surface 18, and the second inclined surface 18 can abut against the contact ring 19. During the abutment process, the contact ring 19 can pull the inner wall of the sealing ring 9, thereby reducing the force between the sealing ring 9 and the electrode rod 101, so as to facilitate the electrode rod 101 to be pulled back.

[0040] The implementation principle of an electrode structure in an embodiment of the present application is: when the electrode rod 101 needs to be replaced, the sealing seat 42 and the installation tube 41 are separated, and then the two splicing blocks 421 are separated, and the clamping ring 14 of the new electrode rod 101 is re-inserted into the connecting groove 15, and then the splicing blocks 421 are connected. Example

[0041] This embodiment provides an electroresectoscope, which uses the electrode structure in Embodiment 1, and the rest of the structure is the same as that of the prior art.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrode structure, characterized in that: The invention comprises an electrode rod (101), a terminal (2) arranged at one end of the electrode rod (101), an electric cutting ring (3) arranged at an end of the electrode rod (101) away from the terminal (2), and a sealing assembly (4) arranged on the outer wall of the electrode rod (101); the sealing assembly (4) comprises a mounting tube (41) and a sealing seat (42) detachably mounted on the mounting tube (41); the sealing seat (42) is provided with a first hole (5) for the endoscope (102) to pass through and a second hole (6) for the electrode rod (101) to pass through, respectively; the mounting tube (41) is provided with a through hole (7) corresponding to the first hole (5) and the second hole (6); the sealing seat (42) is provided with a through hole (7) corresponding to the first hole (5) and the second hole (6); 2) is composed of two splicing blocks (421), and the first hole (5) and the second hole (6) are divided by the abutting surfaces of the two splicing blocks (421); the second hole (6) has a first section (61) and a second section (62), the inner diameter of the second section (62) is larger than the inner diameter of the first section (61), so that a step edge (8) is formed between the first section (61) and the second section (62); a sealing ring (9) is provided on the outer wall of the electrode rod (101), and an elastic sleeve (10) is provided between the sealing ring (9) and the step edge (8); when the electrode rod (101) slides, the sealing ring (9) can slide in the second section (62).

2. An electrode structure according to claim 1, characterized in that: The sealing assembly (4) comprises a connecting ring (43), the connecting ring (43) being sleeved on the outer wall of the sealing seat (42), and the outer wall of the sealing seat (42) being provided with a resisting member (11), the connecting ring (43) being threadedly connected to the inner wall of the mounting tube (41), and the end of the connecting ring (43) being in contact with the resisting member (11) to drive the sealing seat (42) to move into the mounting tube (41).

3. An electrode structure according to claim 2, characterized in that: The resistance member (11) comprises a resistance column detachably arranged on the side wall of the assembly block (421).

4. An electrode structure according to claim 3, characterized in that: One of the splicing blocks (421) is provided with a plug-in column (12), and the other splicing block (421) is provided with a plug-in slot (13) for plugging the plug-in column (12).

5. An electrode structure according to claim 4, characterized in that: The installation tube (41) is composed of two blocks (411), wherein a limit strip (20) is provided on the side wall of one of the blocks (411), and a limit groove (21) for engaging the limit strip (20) is provided on the side wall of the other block (411); when the two blocks (411) form the installation tube (41), the limit strip (20) and the limit groove (21) are engaged with each other.

6. An electrode structure according to claim 2, characterized in that: The outer diameter of the sealing ring (9) is smaller than the inner diameter of the second hole (6); one end of the elastic sleeve (10) is connected to the side of the sealing ring (9) facing the step edge (8); a snap ring (14) is provided at the other end of the elastic sleeve (10); and a connecting groove (15) for snapping the snap ring (14) is provided on the step edge (8).

7. An electrode structure according to claim 6, characterized in that: A first ring edge (16) is provided on a side of the step edge (8) facing the sealing ring (9), and a first inclined surface (17) is provided on a side of the first ring edge (16) close to the electrode rod (101), wherein the distance between the first inclined surface (17) and the electrode rod (101) gradually increases in a direction close to the sealing ring (9), and when the sealing ring (9) moves in a direction close to the step edge (8), the sealing ring (9) can abut against the first ring edge (16).

8. An electrode structure according to claim 7, characterized in that: A second inclined surface (18) is provided on a side of the sealing ring (9) facing away from the step edge (8), and the distance between the second inclined surface (18) and the electrode rod (101) gradually increases in a direction away from the step edge (8). A contact ring (19) is provided on the inner wall of the mounting tube (41), and when the sealing ring (9) moves toward the inner end surface of the mounting tube (41), the contact ring (19) can contact the second inclined surface (18).

9. A resectoscope, characterized in that: The invention comprises the electrode structure according to any one of claims 1 to 8.

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