Fixed type dura mater pulling device

Abstract

The fixed type dura mater pulling device comprises a vertical supporting plate and a pulling plate which is connected to the bottom of the lower end of the supporting plate and bent leftwards in an arc mode, the front end and the rear end of the supporting plate are connected with connecting plates which pull the operating distance rightwards, and the right ends of the connecting plates are connected with a fixing mechanism fixed to a vertebral body. The fixing mechanism is used for fixing the supporting plate, the pulling plate supports the dura mater, a gap is formed in the bottom, and operation is convenient. The dura mater is pulled open through the supporting plate and the pulling plate, then a vertebral body is punched, a kirschner wire is inserted into the vertebral body, fixing is achieved, the bottom of the dura mater is pulled open through the pulling plate, an operation space is generated, and therefore the kirschner wire is used for fixing, two hands are liberated, and the operation is easier and safer. The rotating handle is rotated, the lower end of the extrusion rod extrudes the push block, the pull plate rotates around the supporting plate, the bottom gap is changed, and therefore the bottom operation space is changed.

Description

Technical Field

[0001] The invention relates to the field of fixed dura mater retractors, in particular to a fixed dura mater retractor. Background Art

[0002] For lumbar disc surgery, the dura mater needs to be pulled open to expose the space at the bottom before the operation can be performed. Currently, one doctor uses a retractor to pull while another doctor performs the surgery. This is very strenuous after a long time of pulling the hook. The most important thing is that it is difficult to maintain this posture all the time. If there is a supporting point or fixed point on the patient, it will be convenient for pulling open the dura mater during the operation. Therefore, how to facilitate the pulling open of the dura mater and save effort is an urgent problem that technicians in this field need to solve. Summary of the invention

[0003] The object of the present invention is to provide a fixed dura mater retractor to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fixed dura mater retractor, comprising a vertical support plate and a pull plate connected to the bottom of the lower end of the support plate and bent to the left in an arc, the front and rear ends of the support plate are respectively connected to connecting plates that are pulled to the right for an operating distance, and the right end of the connecting plate is connected to a fixing mechanism fixed to the vertebral body. The fixing mechanism is used to fix the support plate, and the pull plate lifts the dura mater, and a gap is generated at the bottom for easy operation.

[0005] Preferably, the fixing mechanism includes a sleeve plate installed at the right end of the connecting plate and opening to the right in an arc shape, and a Kirschner wire inserted into the vertebral body is arranged in the sleeve plate. First, the plate is pulled to open the dura mater, and then a hole is punched on the vertebral body. After the hole is punched, the Kirschner wire is inserted to fix the sleeve plate.

[0006] Preferably, the pull plate is connected to the support plate by a rubber strip, and further includes a flip mechanism disposed between the support plate and the pull plate, wherein the flip mechanism can drive the pull plate to flip around the support plate to change the gap of the dura mater. The flip mechanism drives the pull plate to rotate around the support plate to change the size of the gap at the bottom of the dura mater, which is convenient for surgery. Here, the pull plate is connected to the support plate by a rubber strip, and the rubber strip is located between the pull plate and the support plate, and the left and right end faces, and the corresponding end faces of the pull plate and the support plate, are all on the same plane or arc surface, so that there will be no gap, which is smoother than the one that is easy to damage the dura mater.

[0007] Preferably, the flipping mechanism comprises a push block fixed to the right end of the pull plate, the upper end surface of the push block is in an arc shape with the right end bent downward, and a support block is fixed to the right end of the support plate, a squeezing rod passing through the upper and lower parts is threadedly connected to the support block, and the lower end of the squeezing rod abuts against the push block, and a rotating handle is connected to the upper end of the squeezing rod. The squeezing rod is rotated by the rotating handle, and the squeezing rod squeezes the push block to realize the flipping of the pull plate.

[0008] Preferably, the push block is an elastic rubber block so that the pull plate is elastically pressed against the dura mater, and the thickness of the push block gradually decreases from left to right. In this way, the force of the pull plate on the dura mater is elastic, which better protects the dura mater and avoids damage. As the flip angle of the pull plate increases, the deformation of the push block is large, the thickness of the contact part is thinner, and the toughness is better. This is to avoid excessive pulling force on the pull plate, provide a better deformation, and at the same time, slow down the angle adjustment speed. The width of the push block is greater than the diameter of the extrusion rod, so that the front and rear sides of the push block can also be deformed in the later stage, with better toughness and safety.

[0009] Preferably, a rotating mechanism is also included between the connecting plate and the sleeve plate. The pulling plate is mainly flipped from the bottom to increase the gap upwards, and the rotating mechanism is mainly the rotation of the supporting plate, which rotates from the middle position or the upper position of the dura mater to change the angle and change the pulling gap. Here, there is a flipping distance between the connecting plate and the rubber strip on the lower side.

[0010] Preferably, the rotating mechanism includes a supporting shaft vertically fixed to the opposite ends of the two connecting plates, and an annular supporting sleeve is sleeved on the supporting shaft, and the supporting sleeve is fixed to the sleeve plate on the corresponding side, and also includes an elastic supporting mechanism and a clamping mechanism arranged between the supporting shaft and the supporting sleeve, and the clamping mechanism and the supporting mechanism are staggered front and back, and the clamping mechanism can be clamped to achieve fixation when the supporting mechanism is subjected to force. The clamping mechanism achieves fixation, and the elastic supporting mechanism keeps the initial position of the supporting shaft, which is not easy to shake.

[0011] Preferably, the support mechanism comprises an elastic rubber sleeve concentrically arranged between the support shaft and the support sleeve, and the cross section of the rubber sleeve is "U" shaped. The rubber sleeve comprises three parts, an inner sleeve sleeved on the support shaft, an outer sleeve sleeved on the inner side of the support sleeve, and a connecting ring connected between the inner sleeve and the outer sleeve, providing elastic support and deforming under force.

[0012] Preferably, the engaging mechanism comprises front and rear teeth fixed on the support shaft at equal intervals, and the teeth are located between the rubber sleeve and the connecting plate, and a card plate is fixed to one end of the support sleeve close to the connecting plate, and a plurality of parallel card slots corresponding to the teeth are opened on the inner wall of the card plate, and convex ridges are formed between the card slots. The teeth can be inserted into the card slots to achieve fixation, and the support angle of the support plate can be changed by rotating the support shaft. The card plate here is an arc shape that supports the support shaft with its center supported, and can also be a vertical plate shape.

[0013] Preferably, there are three slots and four ridges, and the height of the two ridges at the uppermost and lowermost sides is less than that of the two ridges in the middle, so that when the insert is inserted, the inserts at both sides can abut against the two ridges at the uppermost and lowermost sides. The two ridges in the middle are of the same height, and the top and bottom ridges are shorter, so that the two inserts at the upper and lower sides of the insert inserted into the middle slot abut against the ridges at the top and bottom, thereby improving stability.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Use the support plate and the pull plate to pull open the dura mater, then punch a hole on the vertebral body and insert the Kirschner wire to achieve fixation. The pull plate pulls open the bottom of the dura mater to create an operating space. In this way, the fixation of the Kirschner wire frees both hands, which is easier and safer.

[0016] 2. Turn the rotary handle, the lower end of the extrusion rod squeezes the push block, and the pull plate rotates around the support plate to change the bottom gap, thereby changing the bottom operating space;

[0017] 3. The rubber strip is connected between the pull plate and the support plate, which is smoother and has no edges and corners, and better protects the dura mater;

[0018] 4. The push block is made of rubber and has toughness, which can realize elastic support for the pull plate and elastically pull open the dura mater to achieve better protection;

[0019] 5. Pull the support plate in the direction of the dura mater, then rotate it, adjust the angle, and loosen the opening. Under the tension of the dura mater, the rubber sleeve is squeezed, and the spline on the support shaft is inserted into the slot to achieve fixation and complete the angle adjustment. Here, the angle adjustment and fixation is more convenient, without manual fixation, and automatic fixation. In this way, the support plate can adjust the angle and rotate from the middle or upper side to change the pulling angle of the dura mater;

[0020] 6. The rubber sleeve also has a very important function, that is, when the support plate is pulled against the dura mater, the elastic force of the rubber sleeve drives the support sleeve to move, ensuring that the support shaft is located at the center of the support sleeve. In this way, after loosening, the spline can be inserted into the slot on the right without causing any up and down displacement difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the first embodiment of the present invention;

[0022] Figure 2 It is a right side view of the first embodiment of the present invention;

[0023] Figure 3 is a first isometric view of a first embodiment of the present invention;

[0024] Figure 4 is a second isometric view of the first embodiment of the present invention;

[0025] Figure 5 It is a front view of a second embodiment of the present invention;

[0026] Figure 6 is an isometric view of a second embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the second embodiment of the present invention when the tooth is inserted into the slot;

[0028] Figure 8 An exploded view of a second embodiment of the present invention;

[0029] Fig. 9 FIG. 4 is a schematic diagram showing the position of a blocking piece according to a second embodiment of the present invention.

[0030] In the figure: 1. support plate; 2. pull plate; 3. connecting plate; 4. sleeve plate; 5. Kirschner wire; 6. rubber strip; 7. push block; 8. support block; 9. extrusion rod; 10. rotary handle; 11. support shaft; 12. support sleeve; 13. rubber sleeve; 14. insert gear; 15. clamping plate; 16. clamping groove; 17. convex ridge; 18. baffle. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figures 1 to 4 The present invention provides a technical solution for a fixed dura mater retractor: a fixed dura mater retractor, comprising a vertical support plate 1 and a pull plate 2 connected to the bottom of the lower end of the support plate 1 and bent to the left in an arc, the front and rear ends of the support plate 1 are respectively connected to a connecting plate 3 for pulling the operating distance to the right, and the right end of the connecting plate 3 is connected to a fixing mechanism fixed on the vertebral body. The fixing mechanism is used to fix the support plate 1, and the pull plate 2 lifts the dura mater, and a gap is generated at the bottom for easy operation.

[0034] The fixing mechanism includes a sleeve plate 4 installed at the right end of the connecting plate 3 and opening to the right in an arc shape, and a Kirschner wire 5 inserted into the vertebral body is arranged in the sleeve plate 4. First, the pull plate 2 is pulled open to open the dura mater, and then a hole is punched on the vertebral body. After punching, the Kirschner wire 5 is inserted to fix the sleeve plate 2. The pull plate 2 and the support plate 1 are flipped and connected by a rubber strip 6, and also include a flip mechanism arranged between the support plate 1 and the pull plate 2. The flip mechanism can drive the pull plate 2 to flip around the support plate 1 to change the gap of the dura mater. The flip mechanism drives the pull plate 2 to rotate around the support plate 1 to change the size of the gap at the bottom of the dura mater, which is convenient for surgery. Here, the pull plate 2 and the support plate 1 are connected by a rubber strip 6, and the rubber strip 6 is located between the pull plate 2 and the support plate 1, and the left and right end faces, and the corresponding end faces of the pull plate 2 and the support plate 1, are all on a plane or arc surface, so that there will be no gap, which is smoother than easily damaging the dura mater.

[0035] The flipping mechanism includes a push block 7 fixed to the right end of the pull plate 2, the upper end surface of the push block 7 is in an arc shape with the right end bent downward, and a support block 8 is fixed to the right end of the support plate 1, and a squeezing rod 9 that passes through the upper and lower parts is threadedly connected to the support block 8, and the lower end of the squeezing rod 9 is against the push block 7, and the upper end of the squeezing rod 9 is connected to a rotating handle 10. The squeezing rod 9 is rotated by the rotating handle 10, and the squeezing rod 9 squeezes the push block 7, so that the pull plate 2 is flipped.

[0036] The push block 7 is an elastic rubber block to make the pull plate 2 elastically press against the dura mater, and the thickness of the push block 7 gradually decreases from left to right. In this way, the force of the pull plate 2 on the dura mater is elastic, which better protects the dura mater and avoids damage. As the flip angle of the pull plate 2 increases, the deformation of the push block 7 is large, the thickness of the contact part is thinner, and the toughness is better. This is to avoid excessive pulling force of the pull plate 2, provide better deformation, and at the same time, slow down the angle adjustment speed. The width of the push block 2 is greater than the diameter of the extrusion rod 9, so that the front and rear sides of the push block 7 can also be deformed in the later stage, with better toughness and safety.

[0037] Example 2

[0038] See also Figures 5 to 8 The present invention provides a technical solution for a fixed dura mater retractor: a fixed dura mater retractor, comprising a vertical support plate 1 and a pull plate 2 connected to the bottom of the lower end of the support plate 1 and bent to the left in an arc, the front and rear ends of the support plate 1 are respectively connected to a connecting plate 3 for pulling the operating distance to the right, and the right end of the connecting plate 3 is connected to a fixing mechanism fixed on the vertebral body. The fixing mechanism is used to fix the support plate 1, and the pull plate 2 lifts the dura mater, and a gap is generated at the bottom for easy operation.

[0039] The fixing mechanism includes a sleeve plate 4 installed at the right end of the connecting plate 3 and opening to the right in an arc shape, and a Kirschner wire 5 inserted into the vertebral body is arranged in the sleeve plate 4. First, the pull plate 2 is pulled open to open the dura mater, and then a hole is punched on the vertebral body. After punching, the Kirschner wire 5 is inserted to fix the sleeve plate 2. The pull plate 2 and the support plate 1 are flipped and connected by a rubber strip 6, and also include a flip mechanism arranged between the support plate 1 and the pull plate 2. The flip mechanism can drive the pull plate 2 to flip around the support plate 1 to change the gap of the dura mater. The flip mechanism drives the pull plate 2 to rotate around the support plate 1 to change the size of the gap at the bottom of the dura mater, which is convenient for surgery. Here, the pull plate 2 and the support plate 1 are connected by a rubber strip 6, and the rubber strip 6 is located between the pull plate 2 and the support plate 1, and the left and right end faces, and the corresponding end faces of the pull plate 2 and the support plate 1, are all on a plane or arc surface, so that there will be no gap, which is smoother than easily damaging the dura mater.

[0040] The flipping mechanism includes a push block 7 fixed to the right end of the pull plate 2, the upper end surface of the push block 7 is in an arc shape with the right end bent downward, and a support block 8 is fixed to the right end of the support plate 1, and a squeezing rod 9 that passes through the upper and lower parts is threadedly connected to the support block 8, and the lower end of the squeezing rod 9 is against the push block 7, and the upper end of the squeezing rod 9 is connected to a rotating handle 10. The squeezing rod 9 is rotated by the rotating handle 10, and the squeezing rod 9 squeezes the push block 7, so that the pull plate 2 is flipped.

[0041] The push block 7 is an elastic rubber block to make the pull plate 2 elastically press against the dura mater, and the thickness of the push block 7 gradually decreases from left to right. In this way, the force of the pull plate 2 on the dura mater is elastic, which better protects the dura mater and avoids damage. As the flip angle of the pull plate 2 increases, the deformation of the push block 7 is large, the thickness of the contact part is thinner, and the toughness is better. This is to avoid excessive pulling force of the pull plate 2, provide better deformation, and at the same time, slow down the angle adjustment speed. The width of the push block 2 is greater than the diameter of the extrusion rod 9, so that the front and rear sides of the push block 7 can also be deformed in the later stage, with better toughness and safety.

[0042] It also includes a rotating mechanism arranged between the connecting plate 3 and the sleeve plate 4. The pulling plate 2 is mainly flipped from the bottom to increase the gap upwards. The rotating mechanism is mainly the rotation of the supporting plate 1, which rotates from the middle position or the upper position of the dura mater to change the angle and change the pulling gap. Here, there is a flipping distance between the connecting plate 3 and the rubber strip 6 on the lower side. The rotating mechanism includes a support shaft 11 vertically fixed to the opposite ends of the two connecting plates 3, and an annular support sleeve 12 is sleeved on the support shaft 11, and the support sleeve 12 is fixed on the sleeve plate 4 on the corresponding side. It also includes an elastic supporting mechanism and a clamping mechanism arranged between the supporting shaft 11 and the supporting sleeve 12, and the clamping mechanism and the supporting mechanism are staggered front and back, and the clamping mechanism can be clamped to achieve fixation when the supporting mechanism is subjected to force. The clamping mechanism achieves fixation, and the elastic supporting mechanism keeps the initial position of the supporting shaft 11, which is not easy to shake.

[0043] The support mechanism includes an elastic rubber sleeve 13 disposed concentrically between the support shaft 11 and the support sleeve 12. The cross section of the rubber sleeve 13 is "U" shaped. The rubber sleeve 13 includes three parts, an inner sleeve sleeved on the support shaft 11, an outer sleeve sleeved on the inner side of the support sleeve 12, and a connecting ring connected between the inner sleeve and the outer sleeve, providing elastic support, deforming under force, and fixing the inner sleeve to the support shaft 11.

[0044] The locking mechanism includes front and rear teeth 14 fixed on the support shaft 11 at equal intervals, and the teeth 14 are located between the rubber sleeve 13 and the connecting plate 4. A card plate 15 is fixed to one end of the support sleeve 12 close to the connecting plate 4. A plurality of parallel card slots 16 corresponding to the teeth 14 are provided on the inner wall of the card plate 15, and convex ridges 17 are provided between the card slots 16. The teeth 14 can be inserted into the card slots 16 to achieve fixation, and the support angle of the support plate 1 can be changed by rotating the support shaft 11. The card plate 15 here is an arc shape that supports the support shaft 11 at the center of the circle, and can also be a vertical plate shape. The rubber sleeve 13 also has a very important function, that is, when the support plate is pulled against the dura mater, under the elastic force of the rubber sleeve 13, the support sleeve 12 is driven to move, ensuring that the support shaft 11 is located at the center of the support sleeve 12, so that after loosening, the teeth 14 can be inserted into the card slot 16 on the right side without generating an up and down displacement difference.

[0045] There are three slots 16 and four convex ribs 17. The height of the two uppermost and lowermost convex ribs 17 is less than that of the two middle convex ribs 17, so that when the inserting teeth 14 are inserted, the inserting teeth 14 on both sides can abut against the two uppermost and lowermost convex ribs 17. The two middle convex ribs 17 are of the same height, and the top and bottom convex ribs are shorter, so that the inserting teeth 14 on the upper and lower sides of the inserting teeth 14 inserted into the middle slot 16 abut against the top and bottom convex ribs 17, thereby improving stability.

[0046] like Fig. 9 As shown, a rubber baffle 18 may be provided at the outer end of the rubber sleeve 13 to prevent inward sliding. The baffle 18 is fixed to the inner sleeve of the rubber sleeve 13 or to the support shaft 11 and abuts against the outer end of the support sleeve 12 .

[0047] Working principle: The dura mater is pulled apart by the support plate 1 and the pull plate 2, and then a hole is punched on the vertebral body and the Kirschner wire 5 is inserted to achieve fixation. The pull plate 2 pulls apart the bottom of the dura mater to create an operating space. In this way, the fixation with the Kirschner wire 5 frees both hands, making it easier and safer. Turn the rotary handle 10, and the lower end of the extrusion rod 9 squeezes the push block 7. The pull plate 2 rotates around the support plate 1 to change the bottom gap, thereby changing the bottom operating space. The rubber strip 6 is connected between the pull plate 2 and the support plate 1, which is smoother and has no edges and corners, and better protects the dura mater. The push block 7 is made of rubber material and has toughness, which can achieve elastic support for the pull plate 2 and elastic pulling of the dura mater to achieve better protection. Pull the support plate 1 in the direction of the dura mater, and then rotate it to adjust the angle and loosen the opening. Under the tension of the dura mater, the rubber sleeve 13 is squeezed, and the tooth 14 on the support shaft 11 is inserted into the slot 16 to achieve fixation and complete the angle adjustment. Here, the angle adjustment and fixation are more convenient, and no manual fixation is required. It can be automatically fixed, so that the support plate 1 can adjust the angle and rotate from the middle or upper side to change the pulling angle of the dura mater.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed dura mater retractor, comprising a vertical support plate (1) and a pull plate (2) connected to the bottom of the lower end of the support plate (1) and bent to the left in an arc, characterized in that: The front and rear ends of the support plate (1) are respectively connected to a connecting plate (3) that is pulled to the right for an operating distance, and the right end of the connecting plate (3) is connected to a fixing mechanism fixed on the vertebral body.

2. The fixed dura mater retractor according to claim 1, characterized in that: The fixing mechanism comprises a sleeve plate (4) which is installed at the right end of the connecting plate (3) and opens to the right in an arc shape, and a Kirschner wire (5) inserted into the vertebral body is arranged in the sleeve plate (4).

3. The fixed dura mater retractor according to claim 2, characterized in that: The pulling plate (2) and the supporting plate (1) are connected by a rubber strip (6) in a flipping manner, and also include a flipping mechanism arranged between the supporting plate (1) and the pulling plate (2), wherein the flipping mechanism can drive the pulling plate (2) to flip around the supporting plate (1) to change the pulled gap of the dura mater.

4. The fixed dura mater retractor according to claim 3, characterized in that: The flip mechanism comprises a push block (7) fixed to the right end of the pull plate (2), the upper end surface of the push block (7) is in the shape of an arc with the right end bent downward, and a support block (8) is fixed to the right end of the support plate (1), a squeeze rod (9) passing through the support block (8) is threadedly connected, and the lower end of the squeeze rod (9) abuts against the push block (7), and the upper end of the squeeze rod (9) is connected to a rotary handle (10).

5. The fixed dura mater retractor according to claim 4, characterized in that: The push block (7) is an elastic rubber block so that the pull plate (2) can elastically press against the dura mater, and the thickness of the push block (7) gradually decreases from left to right.

6. The fixed dura mater retractor according to claim 5, characterized in that: It also includes a rotating mechanism arranged between the connecting plate (3) and the sleeve plate (4).

7. The fixed dura mater retractor according to claim 6, characterized in that: The rotating mechanism comprises a support shaft (11) vertically fixed on the opposite ends of the two connecting plates (3), and an annular support sleeve (12) is sleeved on the support shaft (11), and the support sleeve (12) is fixed on the sleeve plate (4) on the corresponding side, and also comprises an elastic support mechanism and a clamping mechanism arranged between the support shaft (11) and the support sleeve (12), and the clamping mechanism and the support mechanism are staggered front and back, and the clamping mechanism can be clamped to achieve fixation when the support mechanism is subjected to force.

8. The fixed dura mater retractor according to claim 7, characterized in that: The support mechanism comprises an elastic rubber sleeve (13) which is arranged concentrically between a support shaft (11) and a support sleeve (12); the cross section of the rubber sleeve (13) is "U"-shaped.

9. The fixed dura mater retractor according to claim 8, characterized in that: The engaging mechanism comprises front and rear inserting teeth (14) fixed on the support shaft (11) at equal intervals, and the inserting teeth (14) are located between the rubber sleeve (13) and the connecting plate (4); a clamping plate (15) is fixed to one end of the support sleeve (12) close to the connecting plate (4); a plurality of parallel clamping grooves (16) corresponding to the inserting teeth (14) are formed on the inner wall of the clamping plate (15), and convex ridges (17) are formed between the clamping grooves (16).

10. The fixed dura mater retractor according to claim 9, characterized in that: There are three slots (16) and four convex ridges (17), and the heights of the two uppermost and lowermost convex ridges (17) are smaller than the heights of the two middle convex ridges (17), so that when the inserting teeth (14) are inserted, the inserting teeth (14) on both sides can abut against the two uppermost and lowermost convex ridges (17).

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