CN111513838A

CN111513838A - Resectoscope and sealing structure thereof

Info

Publication number: CN111513838A
Application number: CN202010287746.0A
Authority: CN
Inventors: 焦海军; 戴钟琪; 俞海滨
Original assignee: Dedao Medical Equipment Hangzhou Co ltd
Current assignee: Dedao Medical Equipment Hangzhou Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-08-11

Abstract

The invention relates to an resectoscope and a sealing structure thereof, comprising an outer sheath, an inner sheath, a handle component, an endoscope, an electrode component and a flushing component, wherein the outer sheath is sleeved outside the inner sheath; the sealing piece is arranged at the joint of the inner sheath and the handle assembly, and is provided with a scope hole for the endoscope to pass through and a rod hole for the electrode assembly to pass through; the sealing element is also provided with a cutting groove which is communicated with the rod hole and the edge of the sealing element. In the invention, the sealing element can simultaneously seal the endoscope and the electrode assembly, and prevent washing liquid from permeating into the handle assembly and the electrode assembly on the other side of the sealing element; the electrode assembly can be clamped into the rod hole from the cutting groove by the cutting groove, so that the installation and the replacement are more convenient; the grooving enables the sealing element to be deformed more easily, and enables the electrode assembly and the sealing element to be pushed and pulled more smoothly.

Description

Resectoscope and sealing structure thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to an resectoscope and a sealing structure thereof.

Background

With the development of modern medical technology, examination and surgery using an electric cutter deep into a patient have become a very common medical technology. Resectoscopes are commonly used in minimally invasive urological surgery, such as prostate hyperplasia. The general electric excision mirror needs to be carried out in an electrolyte environment, a cutting electrode is inserted into a working guide groove through a natural body hole and enters a cavity, and after being activated, the cutting electrode generates plasma to vaporize or coagulate tissues.

Referring to fig. 1 to 2, an resectoscope generally comprises an outer sheath 1, an inner sheath 2, a handle assembly 3, an endoscope 4 and an electrode assembly 5, wherein the outer sheath 1 is sleeved outside the inner sheath 2, the rear end of the inner sheath 2 is connected with the handle assembly 3, the endoscope 4 and the electrode assembly 5 penetrate through the inner sheath 2, and the rear end of the endoscope 4 is provided with a light source interface and an eyepiece; the handle assembly 3 is used for controlling the expansion and contraction of the electrode assembly 5 so as to perform surgery; the outer sheath 1 is provided with an irrigation component for circularly irrigating the operation area during the operation.

Because the resectoscope works in an electrolyte environment and needs continuous circulating flushing during operation, the sealing performance of the electrode assembly 5 is high. Referring to fig. 2 to 3, the sealing structure of the ordinary resectoscope is a sealing plug 10, and the sealing plug 10 is sleeved on the electrode assembly 5 and is in a conical shape to match with the structure at the front end of the handle assembly 3.

The sealing structure is simple, only the electrode is sealed, no sealing structure is arranged on the contact part of the endoscope 4 and the handle assembly 3, and after long-term use, the endoscope 4 and the handle assembly 3 are easily worn, so that the sealing performance is reduced; after the sealing plug 10 is sleeved on the electrode, the sealing plug 10 is not easy to take down and replace due to the structures at the two ends of the electrode assembly 5, and after long-term use, the electrode continuously rubs against the sealing plug 10, and the aging and abrasion of the sealing plug 10 can also influence the sealing effect.

In addition, in the manufacturing process of the sealing plug 10, due to the influence of factors such as processing or measurement, a certain error always exists between the actual size after completion and the standard size. If the size of the sealing plug 10 is too small, the sealing plug is slightly tight with the electrode assembly 5, the friction force is large, the electrode assembly 5 is pushed and pulled back and forth unsmoothly, and for the operation with extremely high fineness, a doctor is not easy to control the finger force during the operation, and even seriously, the misoperation can be caused, other human tissues are damaged, and the operation efficiency is influenced.

Some sealing plugs are often coated with a layer of lubricating oil when leaving a factory, so that the problem of unsmooth pushing and pulling is solved. However, the method only addresses the symptoms and causes but not the root causes, and the problem of unsmooth lubrication and mixing can be caused after the oil is used for a period of time and is dried.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an resectoscope and a sealing structure thereof, which can improve the sealing performance, ensure the smooth push-and-pull between an electrode assembly and a sealing element and facilitate the replacement of a sealing plug.

In order to achieve the purpose, the invention provides the following technical scheme: an resectoscope comprises an outer sheath, an inner sheath, a handle assembly, an endoscope, an electrode assembly and a flushing assembly, wherein the outer sheath is sleeved outside the inner sheath, the rear end of the inner sheath is connected with the handle assembly, the endoscope and the electrode assembly penetrate through the inner sheath, the rear end of the electrode assembly is connected with the handle assembly, and the flushing assembly is arranged on the outer sheath; the sealing piece is arranged at the joint of the inner sheath and the handle assembly, and is provided with a scope hole for the endoscope to pass through and a rod hole for the electrode assembly to pass through; the sealing element is also provided with a cutting groove which is communicated with the rod hole and the edge of the sealing element.

Through above-mentioned technical scheme, the sealing member can seal endoscope and electrode subassembly simultaneously, prevents that flush fluid from permeating handle components and the electrode subassembly of sealing member opposite side.

When the endoscope is installed, the endoscope is in a regular cylindrical shape and can be directly installed through the endoscope hole. However, the electrode assembly, which has an undercut ring at one end and a terminal at the other end, is large in size, and it is difficult to insert the electrode rod through the rod hole. Thus, the present invention provides a slot in the seal that communicates between the stem bore and the edge of the seal. When the sealing element is installed, the electrode assembly can be clamped into the rod hole from the cutting groove, the installation is very convenient, and the sealing element is convenient to replace after aging and abrasion. After the installation is accomplished, the sealing member receives the extrusion of endotheca junction, and the grooving is pressed into a line, can not influence the sealed effect of sealing member itself.

And the sealing element is easier to deform due to the fact that one cutting groove is added. Even if the size of the rod hole is smaller due to error and the extrusion of the electrode assembly is tighter, the grooving provides a certain deformation allowance for the rod hole when the electrode assembly is pushed and pulled, so that the extrusion force of the rod hole on the electrode assembly can be released, the extrusion force applied to the electrode assembly can be reduced, and the smooth pushing and pulling of the electrode assembly can be kept. The push-pull operation of the doctor during the operation is more convenient, and the operation efficiency is improved. The invention does not need to use lubricating oil, and can fundamentally solve the problem of unsmooth friction between the sealing element and the electrode assembly caused by the size error of the sealing element.

Preferably, the sealing element is also provided with a positioning hole, the handle assembly is provided with a positioning rod matched with the positioning hole, and the positioning rod is sleeved in the positioning hole. During installation, the sealing element is sleeved into the positioning rod, so that installation can be completed, and the positioning is very convenient.

Preferably, the top end of the positioning rod is provided with an end cap with a diameter slightly larger than the positioning hole.

Through above-mentioned technical scheme, when the sealing member emboliaed the locating lever, the end cap can extrude the sealing member to the increase friction avoids the sealing member not hard up, prevents that the sealing member from droing from the locating lever, receives extruded sealing member also to make the grooving more closed simultaneously.

Preferably, the rear end of inner sheath is equipped with the connecting seat, and the spread groove has been seted up to the connecting seat surface, be equipped with the connector link with the spread groove matching on the handle components, the connector link is rotatory to be twisted in the spread groove. When the inner sheath connecting piece is connected with the front fixed seat, the connecting buckle is screwed into the connecting groove in a rotating mode, and therefore the inner sheath connecting piece and the front fixed seat are fixed.

Preferably, the spread groove is equipped with relative two, the connector link is equipped with two of symmetry, and two connector links twist respectively in two spread grooves, and both sides atress is even, and fixed effect is better.

Preferably, the inner wall of connecting seat is equipped with a spacing groove, is equipped with spacing post on the handle subassembly, and when the connecting buckle was twisted in the spread groove, spacing post card was gone into in the spacing groove.

Through above-mentioned technical scheme, can avoid the fixed back of sheath connecting piece and preceding fixing base, the connector link roll-off from the spread groove, when the connector link twists in the spread groove, spacing post card goes into the spacing groove, carries on spacingly, avoids not hard up.

Preferably, the electrode assembly comprises an electric cutting ring, an electrode rod and a binding post, the electrode rod penetrates through the inner sheath, the electric cutting ring at the front end of the electrode rod extends out of the inner sheath, the rear end of the electrode rod is connected with the binding post, and the binding post is clamped on the handle assembly; the electrode rod snaps into the rod bore of the seal from the undercut groove.

Through the technical scheme, the binding post is used for being connected with the plasma high-frequency generator, and during operation, electric arcs are generated at the electric excision ring for performing operation incision and electric coagulation. The electrode rod is clamped into the rod hole of the sealing element from the cutting groove, and the electrode assembly is more convenient to mount and replace.

Preferably, the handle assembly is provided with a groove for clamping the electrode rod, and the groove corresponds to the cutting groove in position and is convenient to match with the cutting groove.

Preferably, the handle assembly comprises a fixed handle, a movable handle, a front fixed seat, a rear fixed seat and a connecting rod, the connecting rod is hollow and is used for penetrating through the endoscope, two ends of the connecting rod are respectively and fixedly connected with the front fixed seat and the rear fixed seat, the front fixed seat is connected with the rear end of the inner sheath, and the rear fixed seat is connected with the endoscope; the fixed handle is fixed on the front fixed seat, and the movable handle is connected with the rear fixed seat through the telescopic assembly; the sealing element is arranged on the front fixed seat.

The invention also provides a sealing structure, wherein the sealing structure is provided with a lens hole and a rod hole; the sealing structure is also provided with a cutting groove which is communicated with the rod hole and the edge of the sealing structure. The sealing structure can be used for sealing the resectoscope, the endoscope is arranged in the endoscope hole in a penetrating mode, the electrode assembly is arranged in the rod hole in a penetrating mode, the electrode assembly can be clamped into the rod hole from the cutting groove during installation, and the installation and the replacement are very convenient.

In conclusion, the invention has the following beneficial effects: the seal can simultaneously seal the endoscope and the electrode assembly to prevent washing liquid from permeating into the handle assembly and the electrode assembly on the other side of the seal; the electrode assembly can be clamped into the rod hole from the cutting groove by the cutting groove, so that the installation is very convenient, and the replacement of the sealing element after aging and abrasion is also convenient; meanwhile, the sealing element can be deformed more easily due to the grooving design, so that the electrode assembly and the sealing element can be pushed and pulled more smoothly, and the operation is more convenient.

Drawings

Fig. 1 is a schematic view of a prior art structure.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view from another perspective of fig. 1 showing the sealing plug.

Fig. 4 is a schematic structural diagram of the present invention.

Fig. 5 is an exploded view of fig. 4.

Fig. 6 is a schematic view of a handle assembly of the present invention.

Fig. 7 is a schematic view of the seal and the front mounting block of the present invention.

FIG. 8 is a schematic view of the endoscope and electrode assembly passing through the seal in the present invention.

Fig. 9 is a schematic view of an inner sheath connector according to the present invention.

Reference numerals: 1. an outer sheath; 11. a sheath connector; 12. a liquid outlet hole; 2. an inner sheath; 21. an inner sheath connector; 22. a connecting seat; 221. connecting grooves; 222. a limiting groove; 3. a handle assembly; 31. fixing a handle; 32. a movable handle; 33. a front fixed seat; 331. a connecting buckle; 332. a limiting column; 334. a groove; 34. a rear fixed seat; 35. a connecting rod; 36. positioning a rod; 37. an end cap; 4. an endoscope; 5. an electrode assembly; 51. electrically cutting a ring; 52. an electrode rod; 53. a binding post; 54. a guide sleeve; 6. a flushing assembly; 61. a liquid inlet end; 62. a liquid outlet end; 7. a telescoping assembly; 71. a slider; 72. a front connecting plate; 73. a back connecting plate; 74. mounting grooves; 8. a seal member; 81. a mirror hole; 82. a rod hole; 83. grooving; 84. and (7) positioning the holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

referring to fig. 4 to 5, the present invention discloses an electric cutting scope, which comprises an outer sheath 1, an inner sheath 2, a handle assembly 3, an endoscope 4, an electrode assembly 5 and a flushing assembly 6.

The tail end of the outer sheath 1 is fixed with an outer sheath connecting piece 11, the tail end of the inner sheath 2 is fixed with an inner sheath connecting piece 21, and after the front end of the inner sheath 2 penetrates through the outer sheath 1, the outer sheath connecting piece 11 is connected and sealed with the inner sheath connecting piece 21; the front end of the inner sheath 2 slightly extends out of the front end of the outer sheath 1, and the rear end of the inner sheath connecting piece 21 is connected with the front end of the handle component 3; the rear end of the electrode component 5 is arranged on the handle component 3, and the front end of the electrode component passes through the inner sheath 2 and extends out of the front end of the inner sheath 2; an endoscope 4 is mounted on the handle assembly 3, and the front end of the endoscope 4 passes through the handle assembly 3 and the inner sheath 2.

The flushing component 6 is arranged on the sheath connecting piece 11, the flushing component 6 comprises a liquid inlet end 61 and a liquid outlet end 62, the liquid inlet end 61 is communicated with the inner wall of the sheath 1, flushing liquid enters the sheath 1 from the liquid inlet end 61, flows in along the gap between the sheath 1 and the inner sheath 2, and flows into an operation area from a liquid outlet hole 12 at the front end of the sheath 1; the liquid outlet 62 is connected to the inner wall of the inner sheath 2, and the irrigation liquid in the operation area is sucked into the inner sheath 2 and flows out along the inner sheath 2 and the liquid outlet 62 to circulate. The operation area is circularly flushed by flushing fluid, so that blood, floating tissue debris and other dirt seeped during operation can be timely discharged, and a good electrode visual field is ensured.

The electrode assembly 5 comprises an electric cutting ring 51, an electrode rod 52 and a binding post 53, the electrode rod 52 penetrates through the inner sheath 2, the electric cutting ring 51 at the front end of the electrode rod 52 extends out of the inner sheath 2, the rear end of the electrode rod 52 is connected with the binding post 53, and the binding post 53 is clamped on the handle assembly 3. The binding post 53 is used for connecting a plasma high-frequency generator, and during operation, an electric arc is generated at the electric excision ring 51 for performing operation incision and electric coagulation.

The front end of the electrode rod 52 is also provided with a guide sleeve 54, the front end of the endoscope 4 is sleeved in the guide sleeve 54, and the electrode assembly 5 is pushed and pulled during operation, so that the electrode rod 52 and the endoscope 4 can be kept parallel, and the operation is more stable.

Referring to fig. 6, the handle assembly 3 includes a fixed handle 31, a movable handle 32, a front fixing seat 33, a rear fixing seat 34 and a connecting rod 35, the connecting rod 35 is hollow and is used for penetrating through the endoscope 4, two ends of the connecting rod 35 are respectively fixedly connected with the front fixing seat 33 and the rear fixing seat 34, the front fixing seat 33 is connected with the inner sheath connecting piece 21, and the rear fixing seat 34 is connected with the endoscope 4; the fixed handle 31 is fixed on the front fixed seat 33, and the movable handle 32 is connected with the rear fixed seat 34 through a telescopic assembly 7.

The telescopic assembly 7 comprises a sliding block 71, a front connecting plate 72 and a rear connecting plate 73, the sliding block 71 is in sliding connection with the connecting rod 35, the movable handle 32 is fixed with the sliding block 71, the front end of the front connecting plate 72 is hinged to the sliding block 71, the rear end of the rear connecting plate 73 is hinged to the rear fixing seat 34, and the rear end of the front connecting plate 72 is hinged to the front end of the rear connecting plate 73. The slider 71 is provided with a mounting groove 74, and the terminal 53 is clamped in the mounting groove 74. After the fingers are sleeved into the fixed handle 31 and the movable handle 32, the movable handle 32 can be pushed and pulled, the sliding block 71 is driven to slide back and forth along the connecting rod 35, and the binding post 53 is driven to move back and forth, so that the electrode assembly 5 moves back and forth to perform the operation.

Referring to fig. 7 to 8, in the present embodiment, in order to ensure the sealing property, a sealing member 8 is provided, the sealing member 8 is mounted on the front fixing base 33, a scope hole 81 through which the endoscope 4 passes and a rod hole 82 through which the electrode rod 52 passes are formed in the sealing member 8, and after the inner sheath connecting member 21 is connected with the front fixing base 33, the joint is sealed by the sealing member 8. The seal member 8 can seal the endoscope 4 and the electrode rod 52 at the same time, preventing wash liquid from penetrating into the other side of the seal member 8.

When installed, endoscope 4 is a regular cylinder that can be installed directly through aperture 81. However, the electrode assembly 5, which has the cutting ring 51 at one end and the terminal 53 at the other end, is large in volume, and it is difficult to insert the electrode rod 52 through the rod hole 82. Thus, the present embodiment provides a slot 83 in the seal 8, the slot 83 communicating the stem hole 82 with the edge of the seal 8. When in installation, the electrode rod 52 can be clamped into the rod hole 82 from the cutting groove 83, the installation is very convenient, and the replacement of the sealing element 8 after aging and abrasion is also convenient. After the installation, the sealing member 8 is pressed by the inner sheath connecting member 21, and the cutting groove 83 is pressed into a line, which does not affect the sealing effect of the sealing member 8 itself. Meanwhile, the front fixing seat 33 is also provided with a groove 334 into which the electrode rod 52 is inserted, and the position of the groove 334 corresponds to that of the cutting groove 83, so that the electrode rod 52 can be conveniently inserted into the cutting groove 83.

And the sealing member 8 is more easily deformed due to the addition of one cutting groove 83. Even if the size of the rod hole 82 is smaller due to error and the extrusion on the electrode rod 52 is tighter, the cutting groove 83 provides a certain deformation allowance for the rod hole 82 when the electrode assembly 5 is pushed or pulled, so that the extrusion force of the rod hole 82 on the electrode rod 52 is released, the extrusion force acting on the electrode rod 52 is reduced, and the electrode assembly 5 can be smoothly pushed or pulled. The push-pull operation of the doctor during the operation is more convenient, and the operation efficiency is improved. In the present embodiment, the problem of the unsmooth friction between the sealing member 8 and the electrode assembly 5 caused by the dimensional error of the sealing member 8 can be fundamentally solved without using lubricating oil.

In this embodiment, in order to facilitate the positioning of the sealing member 8 on the front fixing seat 33, a positioning hole 84 is formed on the sealing member 8, and a positioning rod 36 matched with the positioning hole 84 is arranged on the front fixing seat 33. During installation, the sealing element 8 is sleeved into the positioning rod 36, installation can be completed, positioning is very convenient, and in the embodiment, three groups of positioning rods 36 and three groups of positioning holes 84 are arranged, so that the positioning effect is enhanced. Meanwhile, in order to prevent the sealing element 8 from falling off from the positioning rod 36, the end cap 37 with the diameter slightly larger than the positioning hole 84 is arranged at the top end of the positioning rod 36, when the sealing element 8 is sleeved into the positioning rod 36, the end cap 37 can extrude the sealing element 8, so that friction is increased, looseness of the sealing element 8 is avoided, and meanwhile, the cutting groove 83 can be closed by the extruded sealing element 8, and the sealing effect is improved.

In this embodiment, end cap 37 is tapered, with the top of the taper being the same size as alignment hole 84 or smaller than alignment hole 84, the taper increasing in size from the top to the bottom, and the bottom being larger than alignment hole 84. When the positioning rod 36 is sleeved in the positioning hole 84, the top end of the cone can smoothly enter the positioning hole 84 to complete installation, and the positioning hole 84 can be extruded when the bottom end of the cone enters the positioning hole 84.

Referring to fig. 9, the rear end of the inner sheath connector 21 is provided with a connecting seat 22, the outer surface of the connecting seat 22 is provided with a connecting groove 221, and the front fixing seat 33 is provided with a connecting buckle 331 matched with the connecting groove 221. When the inner sheath connecting member 21 is connected to the front fixing base 33, the connecting link 331 is rotated to be screwed into the connecting groove 221, thereby fixing the two.

In this embodiment, the two opposite connection grooves 221 are provided, and the two symmetrical connection buckles 331 are also provided, when the inner sheath connecting member 21 is connected to the front fixing base 33, the two connection buckles 331 are screwed into the two connection grooves 221 respectively, so that the two sides are stressed uniformly, and the fixing effect is better.

Meanwhile, in order to avoid the inner sheath connecting piece 21 and the front fixing seat 33 from being fixed, the connecting buckle 331 slides out of the connecting groove 221, a limiting groove 222 is arranged on the inner wall of the connecting seat 22, a limiting column 332 is arranged on the front fixing seat 33, and when the connecting buckle 331 is screwed into the connecting groove 221, the limiting column 332 is clamped into the limiting groove 222 for limiting and avoiding loosening.

In this embodiment, the connecting seat 22 may be made of an elastic member, such as rubber, so that the limiting post 332 is clamped into the limiting groove 222 when rotating, and after the clamping, the whole connecting seat 22 covers the sealing member 8 and generates a certain extrusion force on the sealing member 8, so that the sealing member 8 compresses the endoscope 4 and the electrode rod 52 which pass through, and meanwhile, the cutting groove 83 is made to be more closed, and the sealing effect is better.

Example 2:

this embodiment discloses a seal structure that employs the seal member 8 of embodiment 1. The sealing element 8 is provided with a mirror hole 81 and a rod hole 82; the sealing member 8 is further provided with a cutting groove 83, and the cutting groove 83 is communicated with the rod hole 82 and the edge of the sealing member 8. The sealing element 8 can be used for sealing the resectoscope, the scope hole 81 is used for penetrating the endoscope 4, the rod hole 82 is used for penetrating the electrode assembly 5, the electrode assembly 5 can be clamped into the rod hole 82 from the cutting groove 83 during installation, and the installation and the replacement are very convenient.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. An resectoscope comprises an outer sheath (1), an inner sheath (2), a handle component (3), an endoscope (4), an electrode component (5) and a flushing component (6), wherein the outer sheath (1) is sleeved outside the inner sheath (2), the rear end of the inner sheath (2) is connected with the handle component (3), the endoscope (4) and the electrode component (5) penetrate through the inner sheath (2), the rear end of the electrode component (5) is connected with the handle component (3), and the flushing component (6) is arranged on the outer sheath (1);

the method is characterized in that: the endoscope sheath is characterized by further comprising a sealing element (8), the sealing element (8) is installed at the joint of the inner sheath (2) and the handle assembly (3), and a scope hole (81) for the endoscope (4) to pass through and a rod hole (82) for the electrode assembly (5) to pass through are formed in the sealing element (8); the sealing element (8) is further provided with a cutting groove (83), and the cutting groove (83) is communicated with the rod hole (82) and the edge of the sealing element (8).

2. An resectoscope according to claim 1, wherein: the sealing element (8) is also provided with a positioning hole (84), the handle assembly (3) is provided with a positioning rod (36) matched with the positioning hole (84), and the positioning rod (36) is sleeved in the positioning hole (84).

3. An resectoscope according to claim 2, wherein: the top end of the positioning rod (36) is provided with an end cap (37) with the diameter slightly larger than that of the positioning hole (84).

4. An resectoscope according to claim 1, wherein: the rear end of interior sheath (2) is equipped with connecting seat (22), and connecting groove (221) have been seted up to connecting seat (22) surface, be equipped with on handle component (3) and connect link (331) that match with connecting groove (221), during connecting groove (221) were twisted in connecting link (331) rotation.

5. An resectoscope according to claim 4, wherein: the connecting grooves (221) are opposite, the connecting buckles (331) are symmetrical, and the two connecting buckles (331) are screwed into the two connecting grooves (221) respectively.

6. An resectoscope according to claim 4, wherein: the inner wall of connecting seat (22) is equipped with a spacing groove (222), is equipped with spacing post (332) on handle component (3), and when connecting buckle (331) twisted in connecting groove (221), spacing post (332) were gone into in spacing groove (222).

7. An resectoscope according to claim 1, wherein: the electrode assembly (5) comprises an electric cutting ring (51), an electrode rod (52) and a binding post (53), the electrode rod (52) penetrates through the inner sheath (2), the electric cutting ring (51) at the front end of the electrode rod (52) extends out of the inner sheath (2), the rear end of the electrode rod (52) is connected with the binding post (53), and the binding post (53) is clamped on the handle assembly (3); the electrode rod (52) is snapped from the undercut groove (83) into the rod bore (82) of the sealing element (8).

8. An resectoscope according to claim 7, wherein: the handle component (3) is provided with a groove (334) for the electrode rod (52) to be clamped in, and the position of the groove (334) corresponds to that of the cutting groove (83).

9. An resectoscope according to claim 1, wherein: the handle assembly (3) comprises a fixed handle (31), a movable handle (32), a front fixed seat (33), a rear fixed seat (34) and a connecting rod (35), the connecting rod (35) is hollow and is used for penetrating through the endoscope (4), two ends of the connecting rod (35) are fixedly connected with the front fixed seat (33) and the rear fixed seat (34) respectively, the front fixed seat (33) is connected with the rear end of the inner sheath (2), and the rear fixed seat (34) is connected with the endoscope (4); the fixed handle (31) is fixed on the front fixed seat (33), and the movable handle (32) is connected with the rear fixed seat (34) through the telescopic component (7); the sealing element (8) is arranged on the front fixed seat (33).

10. A sealing structure, characterized in that: the sealing structure is provided with a mirror hole (81) and a rod hole (82); the sealing structure is also provided with a cutting groove (83), and the cutting groove (83) is communicated with the rod hole (82) and the edge of the sealing structure.