CN214049054U

CN214049054U - Plasma bipolar resectoscope

Info

Publication number: CN214049054U
Application number: CN202022561732.1U
Authority: CN
Inventors: 戴振兴; 王为好; 徐文标
Original assignee: Hunan Wangwang Hospital Co ltd
Current assignee: Hunan Wangwang Hospital Co ltd
Priority date: 2020-11-07
Filing date: 2020-11-07
Publication date: 2021-08-27
Anticipated expiration: 2030-11-07

Abstract

The utility model relates to a plasma bipolar resectoscope, belonging to the technical field of medical equipment, comprising a bracket, wherein the bracket is provided with a scope body, the scope body is arranged on the bracket in a sliding way, the plasma bipolar resectoscope also comprises an electric cutting ring, and the electric cutting ring is arranged on the scope body; the plasma bipolar resectoscope further comprises an inner sheath used for being sleeved with the scope body and an outer sheath sleeved with the inner sheath, one ends of the inner sheath and the outer sheath are arranged on the support, one ends, far away from the support, of the inner sheath and the outer sheath are provided with openings for the power supply cutting ring to move out, the power cutting ring is rotatably arranged on the scope body, and the rotating axis of the power cutting ring is parallel to the length direction of the inner sheath. The possibility of rotating the bracket by an operator is reduced in the operation process, so that the operator can conveniently cut off the focus; meanwhile, the possibility of friction between the outer sheath and the normal tissue in the body of the patient is reduced in the operation process, and the possibility of pathological changes of the normal tissue of the patient is further reduced.

Description

Plasma bipolar resectoscope

Technical Field

The application relates to the technical field of medical equipment, in particular to a plasma bipolar resectoscope.

Background

Urethral stricture and prostatic hyperplasia are common clinical diseases, and are treated by common operations at present, the damage of the traditional open operation to the normal urethral physiological structure is very large, and the patients are difficult to tolerate the wound caused by the open operation; therefore, various minimally invasive surgical methods are gradually applied to clinics, such as resectoscope, and are valued by patients and doctors.

At present, as the patent document with the publication number CN211094668U, discloses an resectoscope, which comprises a sheath, wherein the front end and the middle part of the sheath are both fixed with laser fibers by a fixing clip, and the fixing clip comprises: the laser sheath comprises a sheath body, a main body sliding block, a spring, a guide plate, a guide pipe and a propeller, wherein the sheath body is provided with a semicircular groove I and a semicircular groove II, the semicircular groove I is matched with the sheath body, the semicircular groove II is matched with the laser fiber, the tail part of the sheath body and the tail part of the laser fiber both penetrate through a round table-shaped cylinder, gaps are filled with a sealing rubber plug, the rear side of the cylinder is provided with the main body sliding block, the other end of the main body sliding block is connected with the spring, the other end of the spring is connected with the guide plate, the guide pipe is arranged in the guide plate in a penetrating mode, the other end of the guide pipe is provided with an eyepiece, the guide pipe is communicated with the sheath body, a handle is arranged below the main body sliding block, and the propeller is arranged below the guide plate; when the device is used, the propeller is pressed, the propeller drives the laser fiber to move out of the sheath body, and then the focus is cut.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the laser fiber moves along the sheath body, only the focus in a specific direction can be cut; when needs switching direction, need rotate the resectoscope and then drive laser fiber and rotate, it is comparatively inconvenient to use.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the excision of a lesion, the application provides a plasma bipolar resectoscope.

The plasma bipolar resectoscope adopts the following technical scheme:

a plasma bipolar resectoscope comprises a bracket, wherein a speculum body is arranged on the bracket, the speculum body is arranged on the bracket in a sliding manner, and the plasma bipolar resectoscope further comprises a resectoscope ring which is arranged on the speculum body; the plasma bipolar resectoscope further comprises an inner sheath for sleeving the scope body and an outer sheath for sleeving the inner sheath, the inner sheath and one end of the outer sheath are both arranged on the bracket, and an opening for moving out the power supply cutting ring is formed in one end, far away from the bracket, of the inner sheath and the one end of the outer sheath, and the plasma bipolar resectoscope is characterized in that: the electric cutting ring is rotatably arranged on the endoscope body, and the rotating axis of the electric cutting ring is parallel to the length direction of the inner sheath.

By adopting the technical scheme, when the focus is cut off, after the focus in a certain direction is cut off, the electric cutting ring is rotated to enable the action part of the electric cutting ring to align with the focus in the adjacent direction, and the steps are repeated, so that the focus in the body of a patient is cut off; the process reduces the possibility of rotating the bracket by an operator, thereby facilitating the operator to cut off the focus; meanwhile, the process reduces the possibility of friction between the sheath and the normal tissue in the body of the patient, thereby reducing the possibility of pathological changes of the normal tissue of the patient.

Optionally, the inner sheath includes a first fixing portion disposed on the bracket and a first rotating portion rotatably disposed on the first fixing portion, and a rotation axis of the first rotating portion is parallel to a rotation axis of the resectoscope ring; the endoscope body comprises a second fixed part arranged on the frame and a second rotating part rotatably arranged on the second fixed part, and the rotating axis of the second rotating part is parallel to the rotating axis of the electric cutting ring; the sheath is provided with a rotating part for rotating the electric cutting ring.

By adopting the technical scheme, during operation, an operator can rotate the rotating piece on the outer sheath by holding the support and the other hand, and drives the electric cutting ring to rotate through the rotating piece, so that the possibility of shaking the support when the electric cutting ring is rotated is reduced, the operability of the operator is improved, and the possibility of secondary damage to a patient is reduced.

Optionally, the rotating member includes a first rotating ring rotatably disposed in the sheath, the first rotating portion is located in the first rotating ring, and the sheath is provided with a notch for rotating the first rotating ring; a second rotating ring is arranged in the inner sheath, and the second rotating part is positioned in the second rotating ring; and the second rotating part is provided with a fixing piece for fixing the electric cutting ring.

By adopting the technical scheme, when the action part of the electric cutting ring is rotated, an operator rotates the first rotating ring through the notch, the first rotating ring drives the inner sheath to rotate, the inner sheath rotates to drive the second rotating ring to rotate, the second rotating ring rotates to drive the second rotating part to rotate, and the second rotating part rotates to drive the electric cutting ring to rotate under the action of the fixing part, so that the operation is simple and practical; meanwhile, the rotating angle of the first rotating ring is controlled to drive the electric cutting ring to rotate by a corresponding angle, so that the operability of operators is further improved.

Optionally, the fixing part comprises a clamping seat arranged on the electric cutting ring, and a clamping groove for clamping the second rotating part is formed in the clamping seat.

By adopting the technical scheme, after the electric cutting ring is used for a period of time, the cutting efficiency of the electric cutting ring is reduced; when the electric cutting ring is replaced, the second rotating part is detached from the clamping seat, so that an operator can replace the electric cutting ring conveniently and quickly; when the electric cutting ring is installed, the second rotating part is clamped on the clamping seat, and the operation is simple and practical.

Optionally, the outer peripheral wall of the first rotating ring is provided with a first toothed groove; a first tooth-shaped section is arranged on the inner peripheral wall of the first rotating ring; the first rotating part is provided with a second tooth-shaped groove meshed with the first tooth-shaped section; and a second toothed section is arranged on the inner peripheral wall of the second rotating ring, and a third toothed groove meshed with the second toothed section is formed in the second rotating part.

By adopting the technical scheme, the outer peripheral wall of the first rotating ring is provided with the first tooth-shaped groove, so that the friction force between an operator and the first rotating ring is increased, the possibility of relative sliding between the operator and the first rotating ring is reduced, and the operator can rotate the electric cutting ring conveniently; under the action of the first tooth-shaped section and the second tooth-shaped groove, the possibility of relative sliding between the first rotating part and the first rotating ring is reduced; under the effect of second profile of tooth section and third flute profile, reduced the second and rotated the portion and produced the relative slip's probably with the second swivel, and then the operating personnel of being convenient for changes the effect direction of ring electric cutter.

Optionally, a sliding block is slidably arranged on the outer sheath, the sliding direction of the sliding block is parallel to the length direction of the outer sheath, and a third toothed section meshed with the first toothed groove is arranged on the sliding block; the sheath is provided with an elastic part for driving the third toothed section to be meshed with the first toothed groove.

By adopting the technical scheme, when the action angle of the electric cutting ring is adjusted to the required position, the sliding block is slid, so that the third tooth-shaped section on the melting sliding block is clamped in the first tooth-shaped groove, and the action direction of the electric cutting ring is fixed to the required position, thereby reducing the possibility of rotation of the electric cutting ring when the electric cutting ring cuts a focus, and further improving the operability of an operator; under the effect of elastic component, reduced the operation in-process, the slider has improved the fixed effect to the electricity tangent ring with the possibility that first tooth form groove drops.

Optionally, the elastic member includes a spring disposed on the sheath, and one end of the spring is disposed on the sheath and the other end is disposed on the slider.

By adopting the technical scheme, the third tooth-shaped section on the sliding block is clamped in the first tooth-shaped groove under the action of the elastic force of the spring, so that the possibility of falling off of the third tooth-shaped section is reduced; the spring has the advantages of sensitive response and low price.

Optionally, the first swivel and the second swivel are both provided with water permeable holes.

By adopting the technical scheme, in order to ensure that the visual field of an operator is clear and the excised focus is removed in time in the operation process, normal saline is used for cleaning the excised part in the operation process; the water permeable holes are opened so as to conveniently convey the physiological saline to the required position.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the focus is cut off, after the focus in a certain direction is cut off, the electric cutting ring is rotated to enable the action part of the electric cutting ring to align with the focus in the adjacent direction, and the steps are repeated, so that the focus in the body of a patient is cut off; the process reduces the possibility of rotating the bracket by an operator, thereby facilitating the operator to cut off the focus; meanwhile, the possibility of friction between the outer sheath and the normal tissue in the body of the patient is reduced in the process, and the possibility of pathological changes of the normal tissue of the patient is further reduced;

2. the first rotating ring is rotated through the notch, the first rotating ring drives the inner sheath to rotate, the inner sheath rotates the second rotating ring to rotate, the second rotating ring rotates to drive the second rotating part to rotate, and the second rotating part rotates to drive the electric cutting ring to rotate under the action of the fixing part, so that the operation is simple and practical;

3. under the action of the first tooth-shaped section and the second tooth-shaped groove, the possibility of relative sliding between the first rotating part and the first rotating ring is reduced; under the effect of second profile of tooth section and third flute profile, reduced the second and rotated the portion and produced the relative slip's probably with the second swivel, and then the operating personnel of being convenient for changes the effect direction of ring electric cutter.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is an exploded view of the inner sheath in the embodiment of the present application, which is intended to show a connection structure of the first fixing portion and the first rotating portion;

FIG. 4 is an enlarged schematic view of portion B of FIG. 3;

FIG. 5 is a cross-sectional view of the outer sheath, the inner sheath and the scope body in the embodiment of the present application, which is intended to show the internal structure of the outer sheath, the inner sheath and the scope body;

FIG. 6 is an enlarged schematic view of portion C of FIG. 5;

FIG. 7 is an enlarged schematic view of portion D of FIG. 6;

FIG. 8 is a schematic view of the connection structure of the endoscope body and the resectoscope ring in the embodiment of the present application;

fig. 9 is an enlarged schematic view of portion E of fig. 8.

Description of reference numerals: 1. a support; 2. a mirror body; 21. a second fixed part; 22. a second rotating part; 3. electrically cutting a ring; 4. an inner sheath; 41. a first fixed part; 42. a first rotating section; 5. an outer sheath; 6. a first swivel; 7. a notch; 8. a second swivel; 9. a clamping seat; 10. a clamping groove; 11. a first toothed groove; 12. a first tooth-shaped section; 13. a second toothed groove; 14. a second toothed segment; 15. a third toothed groove; 16. a slider; 17. a third tooth form segment; 18. a spring; 19. a fixed seat; 20. a first connection block; 23. a first fixed block; 24. a first T-shaped slot; 25. a second connecting block; 26. a second fixed block; 27. a second T-shaped slot; 28. an arc-shaped cutting knife; 29. mounting blocks; 30. a first chute; 31. a second runner.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a plasma bipolar resectoscope. Referring to fig. 1 and 2, the endoscope comprises a bracket 1, wherein a lens body 2 is arranged on the bracket 1, and the lens body 2 is arranged on the bracket 1 in a sliding manner; the mirror body 2 comprises a mirror rod and an observation head, and the bracket 1 is provided with a containing rod for containing the mirror rod; the plasma bipolar resectoscope also comprises a resectoscope ring 3, and the resectoscope ring 3 is arranged on the speculum body 2; plasma bipolar resectoscope is still including the sheath 5 that is used for cup jointing the inner sheath 4 of mirror body 2 and cup joints inner sheath 4, the one end of inner sheath 4 and sheath 5 all sets up on support 1, the equal demountable installation of inner sheath 4 and sheath 5 is on support 1, the opening that supplies power to cut 3 and shift out is seted up to the one end that inner sheath 4 and sheath 5 kept away from support 1, the rotatable setting of electricity cut 3 is on mirror body 2, the axis of rotation of electricity cut 3 is on a parallel with the length direction of inner sheath 4.

When the focus is cut, after the focus in a certain direction is cut, the electric cutting ring 3 is rotated to enable the action part of the electric cutting ring 3 to be aligned with the focus in the adjacent direction, and the steps are repeated, so that the focus in the body of a patient is cut.

Referring to fig. 3 and 4, the inner sheath 4 includes a first fixing portion 41 provided on the holder 1 and a first rotating portion 42 rotatably provided on the first fixing portion 41, and a rotation axis of the first rotating portion 42 is parallel to a rotation axis of the resectoscope ring 3; the first rotating portion 42 is provided with a first connecting block 20, the first connecting block 20 is located between the outer peripheral wall and the inner peripheral wall of the first rotating portion 42, the first connecting block 20 extends along the radial direction of the first rotating portion 42, the first connecting block 20 is arranged in a circular ring around the first rotating portion 42, one end, away from the first rotating portion 42, of the first connecting block 20 is provided with a first fixing block 23, the first fixing block 23 is perpendicular to the first connecting block 20, and the cross sections of the first fixing block 23 and the first connecting block 20 along the length direction of the first rotating portion 42 are in a T shape; the fixing portion is provided with a first T-shaped groove 24 for accommodating the first fixing block 23 and the first connecting block 20.

Referring to fig. 3 and 4, the scope 2 includes a second fixed portion 21 disposed on the frame and a second rotating portion 22 rotatably disposed on the second fixed portion 21, and a rotation axis of the second rotating portion 22 is parallel to a rotation axis of the resectoscope ring 3; a second connecting block 25 is arranged on the second rotating portion 22, the second connecting block 25 is located between the outer circumferential wall and the inner circumferential wall of the second rotating portion 22, the second connecting block 25 extends along the radial direction of the second rotating portion 22, the second connecting block 25 is arranged in a circular ring shape around the second rotating portion 22, a second fixing block 26 is arranged at one end, away from the second rotating portion 22, of the second connecting block 25, the second fixing block 26 is perpendicular to the second connecting block 25, and the cross sections of the second fixing block 26 and the second connecting block 25 along the length direction of the second rotating portion 22 are in a T shape; the fixing portion is provided with a second T-shaped groove 27 for accommodating the second fixing block 26 and the second connecting block 25.

Referring to fig. 5 and 6, a rotating member for rotating the resectoscope 3 is disposed on the sheath 5, the rotating member includes a first rotating ring 6 rotatably disposed in the sheath 5, a first mounting groove for accommodating the first rotating ring 6 is formed on an inner peripheral wall of the sheath 5, the first rotating ring 6 is rotatably disposed in the first mounting groove, a first rotating portion 42 is disposed in the first rotating ring 6, a first through hole for the first rotating portion 42 to pass through is formed in the first rotating ring 6, and the first rotating portion 42 is clamped in the first through hole; a notch 7 for rotating the first rotating ring 6 is formed in the outer sheath 5, and the notch 7 is communicated with the mounting groove; the first rotating ring 6 is provided with a water permeable hole.

A second rotating ring 8 is arranged in the inner sheath 4, a second mounting groove is formed in the inner sheath 4, the second rotating ring 8 is located in the second mounting groove, a second rotating part 22 is located in the second rotating ring 8, a second through hole is formed in the second rotating ring 8, and the second rotating part 22 is clamped in the second through hole; the second rotating part 22 is provided with a fixing piece for fixing the electric cutting ring 3; the second rotating ring 8 is provided with a water permeable hole.

Referring to fig. 2 and 8, the electric cutting ring 3 includes a connecting rod, one end of the connecting rod is provided with a mounting plate, the mounting plate is provided with two binding posts, and an arc-shaped cutting knife 28 is arranged between the two binding posts; one end of the connecting rod, which is far away from the mounting plate, is provided with a mounting block 29; referring to fig. 9, a fixing seat 19 for a mirror rod is arranged on the bracket 1, a first sliding groove 30 for the mounting block 29 to slide is formed in the fixing seat 19, and the first sliding groove 30 is connected in an ending manner to form a ring.

An operator rotates the first rotating ring 6 through the notch 7, the first rotating ring 6 drives the inner sheath 4 to rotate, the inner sheath 4 rotates the second rotating ring 8 to rotate, the second rotating ring 8 rotates to drive the second rotating part 22 to rotate, and under the action of the fixing piece, the second rotating part 22 rotates to drive the electric cutting ring 3 to rotate.

Referring to fig. 8, the fixing member includes a clamping seat 9 disposed on the second rotating portion 22, a clamping groove 10 for clamping the electric cutting ring 3 is disposed on the clamping seat 9, and an opening for the mirror rod to move in is disposed on the clamping seat 9; when the electric cutting ring 3 is installed, the second rotating part 22 is clamped on the clamping seat 9 through the opening, and the operation is simple and practical.

Referring to fig. 6 and 7, in order to improve the operability of an operator, a first toothed groove 11 is formed in the outer circumferential wall of the first rotating ring 6, and the first toothed groove 11 is formed along the circumferential direction of the outer circumferential wall of the first rotating ring 6; the outer peripheral wall of the first rotating ring 6 is provided with the first tooth-shaped groove 11, so that the friction force between an operator and the first rotating ring 6 is increased, and the possibility that the operator and the first rotating ring 6 slide relatively is reduced.

Referring to fig. 6 and 7, the inner circumferential wall of the first rotating ring 6 is provided with a first toothed segment 12, and the first toothed segment 12 is arranged along the inner circumferential wall of the first rotating ring 6 in the circumferential direction; the first rotating part 42 is provided with a second tooth-shaped groove 13 meshed with the first tooth-shaped section 12, and the second tooth-shaped groove 13 is formed along the circumferential direction of the outer circumferential wall of the first rotating part 42; under the action of the first tooth-shaped section 12 and the second tooth-shaped groove 13, the possibility of relative sliding between the first rotating part 42 and the first rotating ring 6 is reduced.

Referring to fig. 6 and 7, a second toothed segment 14 is disposed on an inner circumferential wall of the second rotating ring 8, the second toothed segment 14 is disposed along a circumferential direction of the inner circumferential wall of the second rotating ring 8, a third toothed groove 15 meshed with the second toothed segment 14 is disposed on the second rotating portion 22, and the third toothed portion is disposed along a circumferential direction of an outer circumferential wall of the second rotating portion 22; under the action of the second toothed segment 14 and the third toothed groove 15, the possibility of relative sliding between the second rotating part 22 and the second rotating ring 8 is reduced, so that an operator can rotate the action direction of the electric cutting ring 3 conveniently.

The periphery wall of the second rotating ring 8 is provided with a fourth tooth-shaped section, the contact surface between the second rotating ring 8 and the periphery wall of the inner sheath 4 is reduced due to the fourth tooth-shaped section, so that the friction force between the second rotating ring 8 and the inner sheath 4 is reduced, and the second rotating ring 8 can rotate conveniently.

A sliding block 16 is arranged on the outer sheath 5 in a sliding manner, the sliding direction of the sliding block 16 is parallel to the length direction of the outer sheath 5, a second sliding groove 31 for the sliding block 16 to slide is formed in the outer sheath 5, the second sliding groove 31 is communicated with the first toothed groove 11, and a third toothed section 17 meshed with the first toothed groove 11 is arranged on the sliding block 16; the sliding block 16 is slid, so that the third tooth-shaped section 17 on the sliding block 16 is clamped in the first tooth-shaped groove 11, and the action direction of the electric cutting ring 3 is fixed to a required position, and the possibility of rotation of the electric cutting ring 3 is reduced.

The sheath 5 is provided with an elastic part for driving the third toothed section 17 to be meshed with the first toothed groove 11, the elastic part comprises a spring 18 arranged on the sheath 5, one end of the spring 18 is arranged on the sheath 5, and the other end of the spring 18 is arranged on the sliding block 16; under the action of the elastic force of the spring 18, the third tooth-shaped section 17 on the sliding block 16 is clamped in the first tooth-shaped groove 11, so that the possibility of falling off of the third tooth-shaped section 17 is reduced.

The implementation principle of the plasma bipolar resectoscope in the embodiment of the application is as follows:

when the action angle of the arc-shaped cutting knife 28 is changed, an operator rotates the first rotating ring 6 through the notch 7, the first rotating ring 6 drives the inner sheath 4 to rotate, the inner sheath 4 rotates the second rotating ring 8 to rotate, the second rotating ring 8 rotates to drive the second rotating part 22 to rotate, and under the action of the fixing piece, the second rotating part 22 rotates to drive the electric cutting ring 3 to rotate; the slide 16 is then released so that the third toothed segment 17 on the slide 16 snaps into the first toothed groove 11 and the desired cut is then made.

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

Claims

1. A plasma bipolar resectoscope comprises a support (1), wherein a speculum body (2) is arranged on the support (1), the speculum body (2) is arranged on the support (1) in a sliding mode, the plasma bipolar resectoscope further comprises a resectoscope ring (3), and the resectoscope ring (3) is arranged on the speculum body (2); plasma bipolar resectoscope is still including being used for cup jointing inner sheath (4) of mirror body (2) and cup jointing sheath (5) of inner sheath (4), the one end of inner sheath (4) and sheath (5) all sets up on support (1), the opening that power supply surely encircles (3) and shift out is seted up to the one end that support (1) was kept away from in inner sheath (4) and sheath (5), its characterized in that: the electric cutting ring (3) is rotatably arranged on the endoscope body (2), and the rotating axis of the electric cutting ring (3) is parallel to the length direction of the inner sheath (4).

2. A plasma bipolar resectoscope according to claim 1, wherein: the inner sheath (4) comprises a first fixing part (41) arranged on the bracket (1) and a first rotating part (42) rotatably arranged on the first fixing part (41), and the rotating axis of the first rotating part (42) is parallel to the rotating axis of the electric cutting ring (3); the endoscope body (2) comprises a second fixed part (21) arranged on the frame and a second rotating part (22) rotatably arranged on the second fixed part (21), and the rotating axis of the second rotating part (22) is parallel to the rotating axis of the resectoscope ring (3); the sheath (5) is provided with a rotating part for rotating the electric cutting ring (3).

3. A plasma bipolar resectoscope according to claim 2, wherein: the rotating part comprises a first rotating ring (6) which is rotatably arranged in the outer sheath (5), the first rotating part (42) is positioned in the first rotating ring (6), and a notch (7) for rotating the first rotating ring (6) is formed in the outer sheath (5); a second rotating ring (8) is arranged in the inner sheath (4), and the second rotating part (22) is positioned in the second rotating ring (8); the second rotating part (22) is provided with a fixing piece for fixing the electric cutting ring (3).

4. A plasma bipolar resectoscope according to claim 3, wherein: the mounting is including setting up joint seat (9) on second rotation portion (22), joint groove (10) of joint electricity earnestly ring (3) are seted up on joint seat (9).

5. A plasma bipolar resectoscope according to claim 3, wherein: the outer peripheral wall of the first rotating ring (6) is provided with a first tooth-shaped groove (11); a first tooth-shaped section (12) is arranged on the inner peripheral wall of the first rotating ring (6); the first rotating part (42) is provided with a second tooth-shaped groove (13) meshed with the first tooth-shaped section (12); the inner peripheral wall of the second rotating ring (8) is provided with a second toothed section (14), and the second rotating part (22) is provided with a third toothed groove (15) meshed with the second toothed section (14).

6. The plasma bipolar resectoscope of claim 5, wherein: a sliding block (16) is arranged on the outer sheath (5) in a sliding manner, the sliding direction of the sliding block (16) is parallel to the length direction of the outer sheath (5), and a third toothed section (17) meshed with the first toothed groove (11) is arranged on the sliding block (16); the sheath (5) is provided with an elastic part for driving the third toothed section (17) to be meshed with the first toothed groove (11).

7. A plasma bipolar resectoscope according to claim 6, wherein: the elastic part comprises a spring (18) arranged on the outer sheath (5), one end of the spring (18) is arranged on the outer sheath (5), and the other end of the spring is arranged on the sliding block (16).

8. A plasma bipolar resectoscope according to claim 3, wherein: and the first rotating ring (6) and the second rotating ring (8) are both provided with water permeable holes.