CN219250288U

CN219250288U - Minimally invasive spinal surgery channel retractor under microscope

Info

Publication number: CN219250288U
Application number: CN202320082355.4U
Authority: CN
Inventors: 郭涛; 邢雪艳; 种传峰; 刘晓航
Original assignee: Shinva Surgical Instrument Co ltd
Current assignee: Shinva Surgical Instrument Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-06-27
Anticipated expiration: 2033-01-13

Abstract

The utility model belongs to the field of medical equipment, and relates to a minimally invasive spinal surgery channel retractor under a microscope, which comprises a main support frame, wherein the bottom end of the main support frame is provided with a clamping mechanism, the middle part of the main support frame is connected with a flexible shaft mechanism through a rotating piece, and the tail end of the flexible shaft mechanism is connected with an endoscope retractor; the flexible shaft mechanism comprises a flexible shaft handle and a flexible shaft body, the flexible shaft body comprises a plurality of ball joints which are connected with each other, the last ball joint at the tail end of the flexible shaft body is connected with the speculum retractor, and the flexible shaft handle and the flexible shaft body are connected and locked through a locking piece. The utility model can be adjusted in multiple angles and multiple directions, can establish a visual operation channel and has small retraction incision.

Description

Minimally invasive spinal surgery channel retractor under microscope

Technical Field

The utility model relates to a minimally invasive spinal surgery channel retractor under a microscope, and belongs to the field of medical instruments.

Background

When the minimally invasive spine surgery under the microscope is performed, a surgical channel needs to be established to expose a surgical field, at the moment, a doctor needs to use a retractor to retract skin and subcutaneous tissues layer by layer, and the surgical channel is established, so that the surgical field is exposed for the doctor to perform the surgical operation. When the traditional retractor is used for retracting skin and subcutaneous tissues, the retraction direction is single, the retraction distance is large (about 3 mm), the retraction edge tissues are easy to damage, the matched light guide beams cannot be fixed, a doctor can easily damage the skin and the subcutaneous tissues in the operation process, the traditional retractor is heavy, multi-angle and multi-azimuth adjustment cannot be carried out in the operation to meet the requirements of the view in the operation, when the minimally invasive spine operation under the microscope is carried out, a doctor is often required to assist in operation, the operation of the microscope is affected, and the operation view is shielded. In the face of surgical sites with different positions and different sizes, proper retractors need to be selected for operation, and the current retractors have insufficient universality and can not meet the requirements of medical staff on minimally invasive surgery under a set of retractors facing to spinal microscopes with different conditions.

Disclosure of Invention

The utility model aims to solve the technical problems that: the minimally invasive spinal surgical channel retractor under the microscope can be adjusted in multiple angles and multiple directions, a visual surgical channel can be established, and a retraction incision is small.

The utility model relates to a minimally invasive spinal surgery channel retractor under a microscope, which comprises a main support frame, wherein the bottom end of the main support frame is provided with a clamping mechanism, the middle part of the main support frame is connected with a flexible shaft mechanism through a rotating piece, and the tail end of the flexible shaft mechanism is connected with the retractor; the flexible shaft mechanism comprises a flexible shaft handle and a flexible shaft body, the flexible shaft body comprises a plurality of ball joints which are connected with each other, the last ball joint at the tail end of the flexible shaft body is connected with the speculum retractor, and the flexible shaft handle and the flexible shaft body are connected and locked through a locking piece.

In the specific working process, the device is fixed on an operating table through the clamping mechanism, the relative position of the flexible shaft mechanism is adjusted through the rotating piece, so that the flexible shaft mechanism rotates to a specified proper position, the endoscope retractor can reach the specified position through adjusting the relative position of the movable joint of the ball body, the retraction angle is proper, then all the ball bodies are movably locked and fixed into a rigid body through the locking piece, the position change cannot occur at will, and the multi-angle and multi-azimuth adjustment of the endoscope retractor is realized through integral coordination; the cold light source is fixedly connected to the speculum retractor, the speculum retractor is matched with the cold light source to establish a visual operation channel, and the speculum retractor is small in retracting incision and does not damage incision edge tissues.

Preferably, the main support comprises a vertical rod and a screw rod, wherein the bottom end of the vertical rod is fixedly connected with the top end of the clamping mechanism, the screw rod is positioned in an inner cavity of the vertical rod, the screw rod is in threaded connection fit with the inner wall of the vertical rod, the screw rod penetrates into the clamping mechanism, and a hand wheel is arranged at the top end of the screw rod; the rotating piece is connected to the periphery of the vertical rod. The length of the screw rod extending into the clamping mechanism can be adjusted by rotating the hand wheel, so that the clamping mechanism is loosened and clamped.

Preferably, the clamping mechanism comprises a clamping fixed block and a movable clamping block, the middle part of the movable clamping block is connected with the clamping fixed block through a rotary pin shaft, the rotary pin shaft is fixedly connected with the movable clamping block, and the rotary pin shaft is rotationally connected with the clamping fixed block; the end part of the rotary pin shaft is provided with a torsion spring, one end of the torsion spring is fixedly connected with the rotary pin shaft, and the other end of the torsion spring is blocked between the two spring blocking pins; one side of the movable clamping block corresponds to the bottom end of the screw rod, and the other side of the movable clamping block corresponds to the top end of the opening of the clamping fixing block. When the surgical bed is used, the surgical bed is positioned between the clamping fixed block and the movable clamping block, then the hand wheel at the top end of the screw rod is screwed, the bottom end of the screw rod is propped against one side of the movable clamping block to rotate downwards, the movable clamping block drives the rotary pin shaft to rotate, and the other side of the movable clamping block is lifted to clamp the surgical bed together with the clamping fixed block, so that the main support frame is fixed with the surgical bed. The bottom end of the screw rod is provided with the cover type nut, the cambered surface of the cover type nut is abutted against the movable clamping block, and the movable clamping block is not damaged. When the screwing screw rod moves upwards, the force abutting against one side of the movable clamping block disappears, the rotary pin shaft drives the movable clamping block to rotate reversely under the action of the torsion spring, and the other side of the movable clamping block is separated from the clamping fixing block, so that the device can be smoothly separated from the operating table.

Preferably, the rotating piece comprises a vertical rod locking sleeve and a horizontal rod locking sleeve, wherein the vertical rod locking sleeve and the horizontal rod locking sleeve both comprise cylindrical clamping grooves and locking gaps, the vertical rod is inserted into the cylindrical clamping grooves of the vertical rod locking sleeve, the flexible shaft handle is T-shaped, and the vertical rod part of the flexible shaft handle is inserted into the cylindrical clamping grooves of the horizontal rod locking sleeve; the cylindrical clamping groove is formed in one end of the vertical rod locking sleeve and one end of the cross rod locking sleeve, the locking gap is communicated with the cylindrical clamping groove, communication holes are formed in two side walls of the locking gap of the vertical rod locking sleeve and the two side walls of the locking gap of the cross rod locking sleeve, the same pull rod is inserted into the communication holes of the vertical rod locking sleeve and the communication holes of the cross rod locking sleeve, one end of the pull rod is connected with a nut, the other end of the pull rod is connected with a cam, and a locking handle is fixedly connected to the cam; the cam is provided with a connecting groove, one end of the pull rod connected with the cam is provided with a flat round platform, the flat round platform is inserted into the connecting groove, and the cam is connected with the flat round platform through a positioning pin shaft. The cam is eccentrically arranged with the positioning pin shaft, the outer edge of the cam is provided with a releasing state platform and a locking state platform, the distance between the arc edge of the releasing state platform and the locking state platform and the positioning pin shaft is gradually increased, the releasing state platform, the arc edge and the locking state platform are in smooth transition, when the cam is rotated by the hand-held locking handle, the cam passes through the arc edge from the releasing state platform and then rotates to the locking state platform, in the process, the pull rod is tensioned, the locking gap between the vertical rod locking sleeve and the horizontal rod locking sleeve is gradually extruded and reduced, and the vertical rod parts of the vertical rod and the flexible shaft handle are locked by the cylindrical clamping grooves of the vertical rod locking sleeve and the horizontal rod locking sleeve; when the position of the rotating piece relative to the vertical rod is required to be adjusted, or the position of the flexible shaft handle is required to be adjusted, the cam can be operated, so that the cam is rotated to a releasing state platform from a locking state platform, the pull rod is released, the locking gap between the vertical rod locking sleeve and the horizontal rod locking sleeve is enlarged, and the vertical rod parts of the vertical rod locking sleeve and the vertical rod part of the flexible shaft handle are released. The contact surfaces of the vertical rod locking sleeve and the cross rod locking sleeve are provided with the universal meshing teeth which are meshed with each other, and the cross rod locking sleeve can be independently rotated according to the requirement, so that the cross rod locking sleeve drives the flexible shaft handle to rotate to a proper position, and the vertical rod locking sleeve and the cross rod locking sleeve are prevented from random rotation through the universal meshing teeth.

Preferably, the locking piece comprises a steel wire rope, the steel wire rope penetrates through all the sphere loose joints and is inserted into the flexible shaft handle, and the tail end of the steel wire rope penetrates through the last sphere loose joint and is fixedly connected with the rope knot; the flexible shaft handle is internally provided with an adapting bolt in threaded connection with the flexible shaft handle, the head end of the steel wire rope is fixedly connected with a knot screw, and the head end of the steel wire rope is fixedly connected with the adapting bolt through the knot screw; the transfer bolt is also connected with a locking nut through threaded connection, and the locking nut is connected with a flexible shaft handle through a bearing. The steel wire rope and the transfer bolt are arranged at the horizontal part of the T-shaped flexible shaft handle; the end part of the transfer bolt penetrating out of the lock nut is connected with the lock screw, so that the transfer bolt is prevented from being completely sunk into the lock nut; when the ball body loose joint position is adjusted, the lock nut is rotated, and the lock nut is connected with the flexible shaft handle through the bearing, so that when the lock nut is rotated, the transfer bolt gradually stretches out of the lock nut along with threaded connection, the length of the transfer bolt gradually increases along with the extension of the transfer bolt outside the lock nut, the steel wire rope in the ball body loose joint is gradually tensioned, when the steel wire rope is pulled to be tightest, the loose joint positions of the ball bodies are fixed, the flexible shaft body becomes a rigid body, no position change occurs at will, and the flexible shaft mechanism is adjusted in multiple angles and multiple directions.

Preferably, the end part of the last section of sphere loose joint is fixedly connected with a tail bolt, one end of the tail bolt is in threaded connection with the sphere loose joint, the other end of the tail bolt is provided with a connector, and the connector is provided with a tail bolt threaded hole; the speculum retractor comprises a connecting plate, one end of the connecting plate is fixedly connected with the sleeve, the other end of the connecting plate is provided with a U-shaped groove, and the locking screw is used for fixedly connecting the tail bolt with the connecting plate through the tail bolt threaded hole and the U-shaped groove. The tail bolt is used for plugging the tail end of the sphere in a loose joint manner and is convenient to connect with the retractor of the speculum. Sleeves (such as straight barrels, conical barrels and the like) with different sizes and shapes can be arranged to be matched with the connector of the tail bolt, skin tissues can be retracted by the sleeves, surgical operation can be performed by matching with surgical instruments, and the damage of the traditional retractor to long-time unidirectional retraction of human tissues is avoided.

Preferably, the connector top surface set up the flat groove, the connector flat groove is equipped with the stopper, stopper width and U type groove opening size match. When the installation U type groove inserts, the stopper plays the spacing effect of direction in the insertion process in U type groove, is favorable to accurate installation, does not need artifical accurate alignment.

Preferably, grooves are formed in two sides of the tail bolt threaded hole, and fixing hooks are arranged at positions, corresponding to the grooves, of the bottom surface of the connecting plate. The mounting position of the connecting plate is further accurate, and the fixing hooks are inserted into the grooves, so that the relative displacement between the connecting plate and the tail bolt connector can be effectively prevented.

Preferably, the connecting plate and the sleeve are provided with through inclined through holes, and the cold light source can enter the inside of the endoscope retractor through the inclined through holes and can not block the visual field.

Compared with the prior art, the utility model has the following beneficial effects:

1. the length of the screw extending into the clamping mechanism can be adjusted by rotating the hand wheel, so that the clamping mechanism is loosened and clamped, the device is convenient to detach from the operating table, and the device is reliable to fix on the operating table;

2. the vertical rod locking sleeve can be fixed at any height of the effective use range of the vertical rod, and meanwhile, the horizontal rod locking sleeve can be driven to rotate circumferentially; the transverse rod locking sleeve and the vertical rod locking sleeve are meshed through universal meshing teeth to realize multi-angle adjustment of the transverse rod retracting sleeve, and after the position is determined, the vertical rod locking sleeve and the transverse rod retracting sleeve can be fixed on the vertical rod through the pull rod and the locking handle; meanwhile, the transverse rod retracting sleeve is connected with the flexible shaft handle, so that multi-angle and multi-azimuth support of the flexible shaft handle can be realized;

3. the flexible shaft body is connected with the flexible shaft handle, the flexible shaft body is formed by matching a plurality of sphere slipknots, one end of each sphere slipknot is spherical, universal adjustment can be realized, after position adjustment is finished, one end of each flexible shaft handle is provided with a lock nut, a steel wire rope is arranged in the flexible shaft, when the lock nut is screwed down in a rotating mode, the steel wire rope is tensioned, and the flexible shaft is in a tightening state, so that multi-angle and multi-azimuth adjustment of the intraoperative endoscope retractor is realized, and clinical requirements are met;

4. the tail bolt is connected with the tail end of the flexible shaft body, and the flexible shaft body is ensured to be firmly connected with the speculum retractor by arranging a flat groove, a groove and a limiting block and matching with a locking screw;

5. the connecting plate is arranged on the speculum retractor and is used for connecting a connecting body of the tail bolt, the connecting plate is fixedly connected with the sleeve, the sleeve (such as a straight barrel shape, a conical barrel shape and the like) with different sizes and different shapes can be selectively arranged, the sleeve can retract skin tissues and is matched with surgical instruments to perform surgical operation, the damage of the traditional retractor to human tissues due to long-time unidirectional traction is avoided, and the retraction incision is small (2 mm-3 mm); meanwhile, the inclined through hole is formed in the endoscope retractor, and the cold light source can enter the inside of the endoscope retractor through the inclined through hole and cannot block the visual field.

Drawings

FIG. 1 is a schematic diagram of a minimally invasive spinal surgical channel retractor under a microscope;

FIG. 2 is a schematic view of a clamping mechanism;

FIG. 3 is a schematic view of a rotating member structure;

FIG. 4 is a schematic diagram of a pull rod configuration;

FIG. 5 is a front view of the vertical rod locking sleeve and the horizontal rod locking sleeve;

FIG. 6 is a right side view of the vertical rod locking sleeve and the horizontal rod locking sleeve;

FIG. 7 is a schematic view of a retaining member;

FIG. 8 is a schematic view of the connection of the speculum retractor to the flexible shaft;

fig. 9 is a schematic view of the speculum retractor.

In the figure: 1. a hand wheel; 2. a screw; 3. a locking member; 4. a rotating member; 5. a vertical rod; 6. a clamping mechanism; 7. tail bolts; 8. a speculum retractor; 9. a locking screw; 10. a cold light source; 11. a flexible shaft body; 12. a pull rod; 13. a flexible shaft handle; 14. clamping the fixed block; 15. a cap nut; 16. rotating the pin shaft; 17. a movable clamping block; 18. a torsion spring; 19. a spring catch; 20. limiting pin shafts; 21. a vertical rod locking sleeve; 22. positioning pin shafts; 23. a groove; 24. a locking handle; 25. a cam; 26. locking the gap; 27. a flat round table; 28. a cross rod locking sleeve; 29. a cylindrical clamping groove; 30. universal meshing teeth; 31. a screw cap; 32. a connecting body; 33. a flat groove; 34. rope agglomeration; 35. movably connecting the ball body; 36. a communication hole; 37. a wire rope; 38. a knot screw; 39. an adapter bolt; 40. a bearing; 41. a lock nut; 42. a locking screw; 43. a limiting block; 44. an inclined through hole; 45. a sleeve; 46. a connecting plate; 47. a groove; 48. a fixed hook; 49. u-shaped groove.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

1-9, the minimally invasive spinal surgery channel retractor under the microscope comprises a main support frame, wherein the bottom end of the main support frame is provided with a clamping mechanism 6, the middle part of the main support frame is connected with a flexible shaft mechanism through a rotating piece 4, and the tail end of the flexible shaft mechanism is connected with an endoscope retractor 8; the flexible shaft mechanism comprises a flexible shaft handle 13 and a flexible shaft body 11, the flexible shaft body 11 comprises a plurality of ball loose joints 35 which are connected with each other, the last ball loose joint 35 at the tail end of the flexible shaft body 11 is connected with the speculum retractor 8, and the flexible shaft handle 13 and the flexible shaft body 11 are connected and locked through a locking piece 3.

In this embodiment:

the main support comprises a vertical rod 5 and a screw rod 2, wherein the bottom end of the vertical rod 5 is fixedly connected with the top end of a clamping mechanism 6, the screw rod 2 is positioned in an inner cavity of the vertical rod 5, the screw rod 2 is in threaded connection fit with the inner wall of the vertical rod 5, the screw rod 2 penetrates into the clamping mechanism 6, and a hand wheel 1 is arranged at the top end of the screw rod 2; the rotating piece 4 is connected to the periphery of the vertical rod 5. By rotating the hand wheel 1, the length of the screw 2 extending into the clamping mechanism 6 can be adjusted, thereby loosening and clamping the clamping mechanism 6. The hand wheel 1 is connected with the top end of the screw rod 2 through threaded connection, and a limiting pin shaft 20 is additionally arranged between the hand wheel 1 and the screw rod 2, so that the hand wheel 1 and the screw rod 2 are prevented from relative rotation which does not exist.

The clamping mechanism 6 comprises a clamping fixed block 14 and a movable clamping block 17, the middle part of the movable clamping block 17 is connected with the clamping fixed block 14 through a rotary pin 16, the rotary pin 16 is fixedly connected with the movable clamping block 17, and the rotary pin 16 is rotationally connected with the clamping fixed block 14; the end part of the rotary pin 16 is provided with a torsion spring 18, one end of the torsion spring 18 is fixedly connected with the rotary pin 16, and the other end is blocked between two spring blocking pins 19; one side of the movable clamping block 17 corresponds to the bottom end of the screw rod 2, and the other side of the movable clamping block 17 corresponds to the top end of the opening of the clamping and fixing block 14. When the surgical bed is used, the surgical bed is positioned between the clamping fixed block 14 and the movable clamping block 17, then the hand wheel 1 at the top end of the screw rod 2 is screwed, the bottom end of the screw rod 2 is rotated downwards against one side of the movable clamping block 17, the movable clamping block 17 drives the rotary pin shaft 16 to rotate, and the other side of the movable clamping block 17 is lifted to clamp the surgical bed together with the clamping fixed block 14, so that the main support frame is fixed with the surgical bed. The bottom end of the screw rod 2 is provided with the cap nut 15, the cambered surface of the cap nut 15 is tightly abutted against the movable clamping block 17, and the movable clamping block 17 is not damaged. When the screwing screw rod 2 moves upwards, the force abutting against one side of the movable clamping block 17 disappears, the rotary pin 16 drives the movable clamping block 17 to rotate reversely under the action of the torsion spring 18, and the other side of the movable clamping block 17 is separated from the clamping fixed block 14, so that the device can be smoothly separated from an operating table.

The rotating piece 4 comprises a vertical rod locking sleeve 21 and a horizontal rod locking sleeve 28, wherein the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28 comprise a cylindrical clamping groove 29 and a locking gap 26, the vertical rod 5 is inserted into the cylindrical clamping groove 29 of the vertical rod locking sleeve 21, the flexible shaft handle 13 is T-shaped, and the vertical rod part of the flexible shaft handle 13 is inserted into the cylindrical clamping groove 29 of the horizontal rod locking sleeve 28; the cylindrical clamping groove 29 is formed in one end of the vertical rod locking sleeve 21 and one end of the horizontal rod locking sleeve 28, the locking gap 26 is communicated with the cylindrical clamping groove 29, communication holes 36 are formed in two side walls of the locking gap 26 of the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28, the same pull rod 12 is inserted into the communication holes 36 of the vertical rod locking sleeve 21 and the communication holes 36 of the horizontal rod locking sleeve 28, one end of the pull rod 12 is connected with a nut 31, the other end of the pull rod 12 is connected with a cam 25, and a locking handle 24 is fixedly connected to the cam 25; the cam 25 is provided with a connecting groove 23, one end of the pull rod 12 connected with the cam 25 is provided with a flat round platform 27, the flat round platform 27 is inserted into the connecting groove 23, and the cam 25 is connected with the flat round platform 27 through a positioning pin shaft 22. The cam 25 is eccentrically arranged with the positioning pin 22, the outer edge of the cam 25 is provided with a releasing state platform and a locking state platform, the distance between the arc edge of the releasing state platform and the locking state platform and the positioning pin 22 is gradually increased, the releasing state platform, the arc edge and the locking state platform are smoothly transited, when the cam 25 is rotated by holding the locking handle 24, the cam 25 passes through the arc edge from the releasing state platform and then rotates to the locking state platform, in the process, the pull rod 12 is tensioned, the locking gap 26 between the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28 is gradually extruded and reduced, and the cylindrical clamping grooves 29 of the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28 lock the vertical rod 5 and the vertical rod part of the flexible shaft handle 13; when the position of the rotating member 4 relative to the vertical rod 5 needs to be adjusted, or the position of the flexible shaft handle 13 needs to be adjusted, the cam 25 can be operated, so that the cam 25 rotates from the locking state platform to the releasing state platform, the pull rod 12 is released, the locking gap 26 between the vertical rod locking sleeve 21 and the cross rod locking sleeve 28 is enlarged, and the cylindrical clamping grooves 29 of the vertical rod locking sleeve 21 and the cross rod locking sleeve 28 release the vertical rod parts of the vertical rod 5 and the flexible shaft handle 13. The contact surfaces of the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28 are provided with the universal engagement teeth 30 which are engaged with each other, and the horizontal rod locking sleeve 28 can be independently rotated according to the requirement, so that the horizontal rod locking sleeve 28 drives the flexible shaft handle 13 to rotate to a proper position, and the vertical rod locking sleeve 21 and the horizontal rod locking sleeve 28 are prevented from random rotation through the universal engagement teeth 30.

The locking piece 3 comprises a steel wire rope 37, the steel wire rope 37 penetrates through all sphere loose joints 35 and is inserted into the flexible shaft handle 13, and the tail end of the steel wire rope 37 penetrates through the last sphere loose joint 35 and is fixedly connected with the rope knot block 34; the flexible shaft handle 13 is internally provided with an adapting bolt 39 in threaded connection with the flexible shaft handle 13, the head end of the steel wire rope 37 is fixedly connected with a knot screw 38, and the head end of the steel wire rope 37 is fixedly connected with the adapting bolt 39 through the knot screw 38; the adapter bolt 39 is also connected by a threaded connection with a lock nut 41, and the lock nut 41 is connected by a bearing 40 with the flexible shaft handle 13. The steel wire rope 37 and the transfer bolt 39 are arranged on the horizontal part of the T-shaped flexible shaft handle 13; the end of the transfer bolt 39 penetrating out of the lock nut 41 is connected with a locking screw 42 to prevent the transfer bolt 39 from being completely sunk into the lock nut 41; when the position of the ball loose-joint 35 is adjusted, the lock nuts 41 are rotated, and the lock nuts 41 are connected with the flexible shaft handle 13 through the bearings 40, so that when the lock nuts 41 are rotated, the transfer bolts 39 gradually extend out of the lock nuts 41 along with threaded connection, the lengths of the transfer bolts 39 extending out of the lock nuts 41 are gradually increased, the steel wire ropes 37 in the ball loose-joint 35 are gradually tensioned, when the steel wire ropes 37 are pulled to be the tightest, the positions of the ball loose-joints 35 are fixed, the flexible shaft body 11 becomes a rigid body, position change cannot occur at will, and the flexible shaft mechanism is adjusted in multiple angles and multiple directions.

The end part of the last section of sphere loose joint 35 is fixedly connected with a tail bolt 7, one end of the tail bolt 7 is in threaded connection with the sphere loose joint 35, the other end of the tail bolt 7 is provided with a connector 32, and the connector 32 is provided with a tail bolt threaded hole; the speculum retractor 8 comprises a connecting plate 46, one end of the connecting plate 46 is fixedly connected with the sleeve 45, the other end of the connecting plate is provided with a U-shaped groove 49, and the locking screw 9 is used for fixedly connecting the tail bolt 7 with the connecting plate 46 through a tail bolt threaded hole and the U-shaped groove 49. The tail bolt 7 is used for plugging the tail end of the sphere loose joint 35 on one hand and is convenient to connect with the speculum retractor 8 on the other hand. The sleeve 45 (such as straight barrel shape, conical barrel shape, etc.) with different sizes and shapes can be arranged to be matched with the connector 32 of the tail bolt 7, the sleeve 45 can retract skin tissues and can be matched with surgical instruments to perform surgical operation, so that the damage of the traditional retractor to the long-time unidirectional traction of human tissues is avoided.

The connector 32 top surface sets up flat groove 33, and connector 32 flat groove 33 is equipped with stopper 43, and stopper 43 width and U type groove 49 opening size match. When the U-shaped groove 49 is installed and inserted, the limiting block 43 plays a role in guiding and limiting in the insertion process of the U-shaped groove 49, so that accurate installation is facilitated, and manual accurate alignment is not needed.

Grooves 47 are arranged on two sides of the tail bolt threaded holes, and fixing hooks 48 are arranged on the bottom surface of the connecting plate 46 at positions corresponding to the grooves 47. The mounting position of the connection plate 46 is further accurate, and the fixing hooks 48 are inserted into the grooves 47, so that the connection plate 46 and the connection body 32 of the tail bolt 7 can be effectively prevented from being relatively displaced.

The connection plate 46 and the sleeve 45 are provided with an inclined through hole 44 which is communicated with each other, and the cold light source 10 can enter the inside of the endoscope retractor 8 through the inclined through hole 44 without blocking the visual field.

In the specific working process, the length of the screw rod 2 extending into the clamping mechanism 6 can be adjusted by rotating the hand wheel 1, so that the clamping mechanism 6 is fixed on an operating table; the relative position of the flexible shaft mechanism is adjusted through the rotating piece 4, so that the flexible shaft mechanism rotates to a specified proper position, the endoscope retractor 8 can reach the specified position by adjusting the relative position of the sphere loose joint 35, the retraction angle is proper, then all the sphere loose joints 35 are locked and fixed into a rigid body through the locking piece 3, the position change can not happen at will, and the multi-angle and multi-azimuth adjustment of the endoscope retractor 8 is realized through the integral coordination; the cold light source 10 can enter the inside of the endoscope retractor 8 through the inclined through hole 44, the visual field is not blocked, the operation channel is clearly visible, the sleeve 45 can retract skin tissues and cooperate with surgical instruments to perform operation, the damage of the traditional retractor to the long-time unidirectional retraction of human tissues is avoided, and the retraction incision is small (2 mm-3 mm).

Claims

1. A minimally invasive spinal surgery channel retractor under a microscope, which is characterized in that: comprises a main support, a clamping mechanism (6) is arranged at the bottom end of the main support, the middle part of the main support is connected with a flexible shaft mechanism through a rotating piece (4), and the tail end of the flexible shaft mechanism is connected with an endoscope retractor (8); the flexible shaft mechanism comprises a flexible shaft handle (13) and a flexible shaft body (11), the flexible shaft body (11) comprises a plurality of ball loose joints (35) which are connected with each other, the last ball loose joint (35) at the tail end of the flexible shaft body (11) is connected with the speculum retractor (8), and the flexible shaft handle (13) and the flexible shaft body (11) are connected and locked through a locking piece (3).

2. The minimally invasive surgical pathway retractor of the microscopic spine of claim 1 wherein: the main support comprises a vertical rod (5) and a screw rod (2), wherein the bottom end of the vertical rod (5) is fixedly connected with the top end of the clamping mechanism (6), the screw rod (2) is positioned in an inner cavity of the vertical rod (5), the screw rod (2) is in threaded connection with the inner wall of the vertical rod (5), the screw rod (2) penetrates into the clamping mechanism (6), and a hand wheel (1) is arranged at the top end of the screw rod (2); the rotating piece (4) is connected to the periphery of the vertical rod (5).

3. The minimally invasive surgical channel retractor of the microscopic spine of claim 2 wherein: the clamping mechanism (6) comprises a clamping fixed block (14) and a movable clamping block (17), the middle part of the movable clamping block (17) is connected with the clamping fixed block (14) through a rotary pin shaft (16), the rotary pin shaft (16) is fixedly connected with the movable clamping block (17), and the rotary pin shaft (16) is rotationally connected with the clamping fixed block (14); a torsion spring (18) is arranged at the end part of the rotary pin shaft (16), one end of the torsion spring (18) is fixedly connected with the rotary pin shaft (16), and the other end is blocked between two spring blocking pins (19); one side of the movable clamping block (17) corresponds to the bottom end of the screw rod (2), and the other side of the movable clamping block (17) corresponds to the top end of the opening of the clamping and fixing block (14).

4. The minimally invasive surgical channel retractor of the microscopic spine of claim 2 wherein: the rotating piece (4) comprises a vertical rod locking sleeve (21) and a horizontal rod locking sleeve (28), the vertical rod locking sleeve (21) and the horizontal rod locking sleeve (28) both comprise a cylindrical clamping groove (29) and a locking gap (26), the vertical rod (5) is inserted into the cylindrical clamping groove (29) of the vertical rod locking sleeve (21), the flexible shaft handle (13) is T-shaped, and the vertical rod part of the flexible shaft handle (13) is inserted into the cylindrical clamping groove (29) of the horizontal rod locking sleeve (28); the cylindrical clamping groove (29) is formed in one end of the vertical rod locking sleeve (21) and one end of the cross rod locking sleeve (28), the locking gap (26) is communicated with the cylindrical clamping groove (29), communication holes (36) are formed in two side walls of the locking gap (26) of the vertical rod locking sleeve (21) and the cross rod locking sleeve (28), the same pull rod (12) is inserted into the communication holes (36) of the vertical rod locking sleeve (21) and the communication holes (36) of the cross rod locking sleeve (28), one end of the pull rod (12) is connected with a nut (31), the other end of the pull rod (12) is connected with a cam (25), and a locking handle (24) is fixedly connected to the cam (25); the cam (25) is provided with a connecting groove (23), one end of the pull rod (12) connected with the cam (25) is provided with a flat round platform (27), the flat round platform (27) is inserted into the connecting groove (23), and the cam (25) is connected with the flat round platform (27) through a positioning pin shaft (22).

5. The minimally invasive microscopic spinal surgical tunnel retractor of any of claims 1-4, wherein: the locking piece (3) comprises a steel wire rope (37), the steel wire rope (37) penetrates through all the sphere loose joints (35) and is inserted into the flexible shaft handle (13), and the tail end of the steel wire rope (37) penetrates through the last sphere loose joint (35) and is fixedly connected with the rope knot block (34); a changeover bolt (39) in threaded connection with the flexible shaft handle (13) is arranged in the flexible shaft handle (13), a knot screw (38) is fixedly connected with the head end of the steel wire rope (37), and the head end of the steel wire rope (37) is fixedly connected with the changeover bolt (39) through the knot screw (38); the transfer bolt (39) is also connected with a locking nut (41) through threaded connection, and the locking nut (41) is connected with the flexible shaft handle (13) through a bearing (40).

6. The minimally invasive surgical pathway retractor of the microscopic spine of claim 1 wherein: the end part of the last section of sphere loose joint (35) is fixedly connected with a tail bolt (7), one end of the tail bolt (7) is in threaded connection with the sphere loose joint (35), the other end of the tail bolt is provided with a connecting body (32), and the connecting body (32) is provided with a tail bolt threaded hole; the speculum retractor (8) comprises a connecting plate (46), one end of the connecting plate (46) is fixedly connected with the sleeve (45), the other end of the connecting plate is provided with a U-shaped groove (49), and the locking screw (9) is used for fixedly connecting the tail bolt (7) with the connecting plate (46) through the tail bolt threaded hole and the U-shaped groove (49).

7. The minimally invasive surgical pathway retractor of the microscopic spine of claim 6 wherein: the top surface of the connecting body (32) is provided with a flat groove (33), the flat groove (33) of the connecting body (32) is provided with a limiting block (43), and the width of the limiting block (43) is matched with the opening size of the U-shaped groove (49).

8. The minimally invasive surgical channel retractor of the microscopic spine of claim 6 or 7, wherein: grooves (47) are formed in two sides of the tail bolt threaded holes, and fixing hooks (48) are arranged at positions, corresponding to the grooves (47), on the bottom surface of the connecting plate (46).

9. The minimally invasive surgical pathway retractor of the microscopic spine of claim 6 wherein: the connecting plate (46) and the sleeve (45) are provided with inclined through holes (44) which are communicated.