Minimally invasive scalpel for carpal canal surgery

Abstract

The utility model relates to the technical field of medical apparatus and instruments, and discloses a minimally invasive scalpel for carpal canal surgery, which comprises a scalpel handle, a scalpel head and a handle, the pushing and scratching mechanism is arranged at the top end of the surgical knife handle; and the positioning mechanism is arranged above the surgical knife handle. Through the arrangement of the extension rod, the push block, the rotating rod, the first spring and the tooth plate, when the push block is pushed, the push block drives the extension rod to move leftwards through the sliding block, and due to the fact that the rotating rod is movably connected with the tooth plate, the rotating rod rotates with the fixed rod as the axis and compresses the first spring along with the movement of the push block; and when the push block stops moving, the rotating rod is reset under the recovery action of the first spring, so that the push block is prevented from moving back, pushing and ripping of the carpal canal can be achieved, the wound surface is reduced, and the operation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to a minimally invasive scalpel for carpal tunnel surgery. Background Art

[0002] The carpal tunnel is composed of the flexor retinaculum and the carpal groove. Inside the tunnel, the superficial and deep flexor tendons of each finger are wrapped by the common flexor tendon sheath (ulnar bursa): the flexor pollicis longus tendon is wrapped by the flexor pollicis longus tendon sheath (radial bursa). Since the flexor pollicis longus tendon sheath continues to the distal segment of the thumb, the flexor pollicis longus tendon sheath is connected to the synovial sheath of the thumb. The median nerve becomes flat in the carpal tunnel, close to the deep surface of the radial end of the flexor retinaculum. When the carpal bone is fractured, the median nerve may be compressed, leading to carpal tunnel syndrome.

[0003] When performing surgery on a patient's carpal tunnel, due to the small size of the carpal tunnel, in order to reduce the harm to the patient, it is necessary to use corresponding minimally invasive surgical instruments to perform the surgery. Most of the existing minimally invasive surgical instruments use surgical scissors to release the carpal tunnel. Due to the limitations of the surgical scissors, the patient's wound area will become larger, which is easy to cause damage to the rest of the body. At the same time, the increase in the wound area will also affect the effect of the minimally invasive surgery, so that the patient needs to spend more time on postoperative rehabilitation, so there is a need for improvement. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a minimally invasive scalpel for carpal tunnel surgery, which has the advantage of small wound area.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a minimally invasive scalpel for carpal tunnel surgery, comprising:

[0006] A surgical knife handle, a surgical knife head being fixedly mounted on the left end of the surgical knife handle;

[0007] A pushing and sliding mechanism, which is arranged at the top of the surgical knife handle;

[0008] A positioning mechanism, the positioning mechanism is arranged above the surgical knife handle;

[0009] Among them, the pushing and sliding mechanism includes a slide groove, which is opened in the middle of the top of the surgical knife handle, and the right end inside the slide groove is movably sleeved with a slider, and the bottom end of the slider is fixedly installed with an extension rod, and the left end of the extension rod penetrates the surgical knife handle and extends to the outside of the surgical knife handle. The outer surface of the extension rod and the inner surface of the surgical knife handle are movably sleeved, and the top of the outer surface of the slider is fixedly sleeved with a push block, and the bottom end of the push block is movably connected to the top of the surgical knife handle, and the left end of the push block is fixedly sleeved with a fixed rod, and the push block will cause the extension rod to move.

[0010] As a preferred technical solution of the utility model, the positioning mechanism includes:

[0011] A rotating rod, the rotating rod is movably sleeved on the outer surface of the fixed rod, and the outer surface of the rotating rod is movably sleeved on the inner surface of the push block;

[0012] A first spring, wherein the first spring is fixedly mounted on the left side of the bottom end of the rotating rod, and the other end of the first spring is fixedly connected to the bottom end inside the pushing block;

[0013] The tooth plate is fixedly sleeved on the inner surface of the front part of the top end of the surgical knife handle, and the top end of the tooth plate is movably connected to the right end of the rotating rod.

[0014] As a preferred technical solution of the utility model, a blade is movably sleeved on the inner surface of the middle part of the front end of the extension rod, and a circular hole is opened inside the blade.

[0015] As a preferred technical solution of the utility model, the left and right ends of the circular hole are respectively movably sleeved with a clamping rod, the number of the clamping rods is two, the outer surfaces of the two clamping rods are movably sleeved with the inner surface of the extension rod, the back sides of the two clamping rods are respectively fixedly installed with vertical plates, the vertical plates are movably sleeved on the inner surface of the extension rod, the number of the vertical plates is two, the back sides of the two vertical plates are respectively fixedly installed with a second spring, and the other end of the second spring is fixedly connected to the inner surface of the extension rod.

[0016] As a preferred technical solution of the utility model, limiting grooves are respectively provided at the upper and lower ends of the inner walls on the left and right sides of the extension rod, and the limiting blocks are movably sleeved inside the limiting grooves. A connecting plate is fixedly installed on the outer surface of the limiting block. There are two connecting plates, and the two connecting plates are respectively movably sleeved inside the upper and lower ends of the extension rod, and the rear ends of the two connecting plates are respectively fixedly connected to the front ends of the two vertical plates.

[0017] As a preferred technical solution of the utility model, a long slot is provided at the top of the left end of the extension rod, and a movable block is movably sleeved at the top end of the long slot.

[0018] As a preferred technical solution of the utility model, a long rod is fixedly installed on the left end of the movable block, and movable rods are hinged at the front of the left and right ends of the long rod respectively. There are two movable rods, and the other ends of the two movable rods are respectively hinged to the top ends of the two connecting plates, and the movable rods will cause the connecting plates to move.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] 1. The utility model is provided with an extension rod, a push block, a rotating rod, a first spring and a tooth plate. When the push block is pushed, the push block will drive the extension rod to move to the left through the slider. Since the rotating rod and the tooth plate are movably connected, as the push block moves, the rotating rod will rotate with the fixed rod as the axis and compress the first spring, thereby not hindering the movement of the push block. When the push block stops moving, the rotating rod will be reset under the recovery action of the first spring, thereby preventing the push block from moving back, so that the carpal tunnel can be pushed open, thereby reducing the wound surface and improving the surgical effect.

[0021] 2. The utility model provides a clamping rod, a second spring, a connecting plate, a long rod and a movable rod. When the long rod is pressed, the long rod will move downward with the movable rod, so that the movable rod generates a thrust on the connecting plate, pushing the two connecting plates to move with the vertical plates in opposite directions and compressing the second spring. At this time, the clamping rod fixedly connected to the vertical plate will also move together, so that the clamping rod and the round hole are separated, and the locking of the clamping rod on the blade is released, thereby realizing the rapid disassembly of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the slider of the utility model;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the front side of the utility model;

[0025] Figure 4 This is a schematic cross-sectional view of the front side of the blade of the utility model;

[0026] Figure 5 It is a schematic cross-sectional structure diagram of the top of the blade of the utility model;

[0027] Figure 6 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0028] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0029] Figure 8 for Figure 4 A schematic diagram of the local enlarged structure at C in the middle;

[0030] Fig. 9 for Figure 5 Schematic diagram of the local enlarged structure at point D in the middle.

[0031] In the figure: 1. surgical knife handle; 2. surgical knife head; 3. pushing and sliding mechanism; 301. sliding groove; 302. sliding block; 303. extension rod; 304. pushing block; 305. fixing rod; 4. positioning mechanism; 401. rotating rod; 402. first spring; 403. tooth plate; 5. blade; 6. round hole; 7. clamping rod; 8. vertical plate; 9. second spring; 10. limiting groove; 11. limiting block; 12. connecting plate; 13. long groove; 14. movable block; 15. long rod; 16. movable rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figures 1 to 9 As shown, the utility model provides a minimally invasive scalpel for carpal tunnel surgery, comprising:

[0034] A surgical knife handle 1, a surgical knife head 2 is fixedly mounted on the left end of the surgical knife handle 1;

[0035] A pushing and sliding mechanism 3, which is arranged at the top of the surgical knife handle 1;

[0036] A positioning mechanism 4, which is arranged above the surgical knife handle 1;

[0037] Among them, the pushing and sliding mechanism 3 includes a slide groove 301, which is opened in the middle of the top of the surgical handle 1. The right end of the slide groove 301 is movably sleeved with a slider 302, and the bottom end of the slider 302 is fixedly installed with an extension rod 303. The left end of the extension rod 303 penetrates the surgical handle 1 and extends to the outside of the surgical handle 1. The outer surface of the extension rod 303 and the inner surface of the surgical handle 1 are movably sleeved, and the top of the outer surface of the slider 302 is fixedly sleeved with a push block 304. The bottom end of the push block 304 is movably connected to the top of the surgical handle 1, and the left end of the push block 304 is fixedly sleeved with a fixed rod 305. The push block 304 will move the extension rod 303.

[0038] When the push block 304 is pushed, it will move to the left along the top of the surgical knife handle 1. Since the internal fixed sleeve of the push block 304 is connected to the slider 302, the slider 302 will move along the inner surface of the slide groove 301 under the drive of the push block 304. At this time, the extension rod 303 fixedly connected to the slider 302 will also move to the left, thereby achieving the pushing and cutting of the carpal tunnel, so that the operator does not need to completely cut the patient's carpal tunnel, thereby reducing the area of ​​the wound, and at the same time being more accurate, so that the operation effect is better and more conducive to the patient's recovery.

[0039] Wherein, the positioning mechanism 4 includes:

[0040] A rotating rod 401, the rotating rod 401 is movably sleeved on the outer surface of the fixed rod 305, and the outer surface of the rotating rod 401 is movably sleeved on the inner surface of the push block 304;

[0041] A first spring 402, the first spring 402 is fixedly mounted on the left side of the bottom end of the rotating rod 401, and the other end of the first spring 402 is fixedly connected to the bottom end of the push block 304;

[0042] The tooth plate 403 is fixedly sleeved on the inner surface of the front end of the surgical knife handle 1 , and the top end of the tooth plate 403 is movably connected to the right end of the rotating rod 401 .

[0043] When the push block 304 moves, since the rotating rod 401 and the tooth plate 403 are movably connected, the rotating rod 401 will rotate around the fixed rod 305 and compress the first spring 402. When the push block 304 stops moving, the rotating rod 401 will reset under the restoring action of the first spring 402, thereby cooperating with the tooth plate 403 to prevent the push block 304 from moving back.

[0044] A blade 5 is movably sleeved on the inner surface of the middle part of the front end of the extension rod 303 , and a circular hole 6 is formed inside the blade 5 .

[0045] Due to the presence of the blade 5, the carpal tunnel can be cut open.

[0046] Among them, the left and right ends of the circular hole 6 are respectively movably connected with a clamping rod 7, the number of the clamping rod 7 is two, the outer surfaces of the two clamping rods 7 are movably connected with the inner surface of the extension rod 303, and the back sides of the two clamping rods 7 are respectively fixedly installed with vertical plates 8, the vertical plates 8 are movably connected to the inner surface of the extension rod 303, the number of the vertical plates 8 is two, and the back sides of the two vertical plates 8 are respectively fixedly installed with a second spring 9, and the other end of the second spring 9 is fixedly connected to the inner surface of the extension rod 303.

[0047] Due to the restoring effect of the second spring 9, the vertical plate 8 will return to its original position after moving.

[0048] Among them, limiting grooves 10 are respectively opened at the upper and lower ends of the inner walls on the left and right sides of the extension rod 303, and the limiting blocks 11 are movably sleeved inside the limiting grooves 10. The outer surface of the limiting blocks 11 is fixedly installed with connecting plates 12. There are two connecting plates 12, and the two connecting plates 12 are respectively movably sleeved inside the upper and lower ends of the extension rod 303. The rear ends of the two connecting plates 12 are respectively fixedly connected to the front ends of the two vertical plates 8.

[0049] When the connecting plate 12 moves, the vertical plate 8 will move together with it.

[0050] A long slot 13 is formed at the top of the left end of the extension rod 303 , and a movable block 14 is movably sleeved at the top of the long slot 13 .

[0051] The inner surface of the long groove 13 and the outer surface of the movable block 14 are both smooth, ensuring that the movable block 14 will not get stuck when moving along the inside of the long groove 13 .

[0052] Among them, a long rod 15 is fixedly installed on the left end of the movable block 14, and movable rods 16 are hinged at the front of the left and right ends of the long rod 15 respectively. There are two movable rods 16, and the other ends of the two movable rods 16 are respectively hinged to the top ends of the two connecting plates 12. The movable rods 16 will move the connecting plates 12.

[0053] When the long rod 15 moves downward with the movable rod 16 , the movable rod 16 will generate a thrust on the connecting plates 12 , pushing the two connecting plates 12 to move away from each other.

[0054] The working principle and use process of this utility model:

[0055] First, when using the minimally invasive scalpel, the operator pushes the push block 304, so that the push block 304 drives the extension rod 303 to move to the left through the slider 302, thereby cooperating with the blade 5 locked at the left end of the extension rod 303 to push and cut the patient's carpal tunnel. At this time, as the push block 304 moves, the rotating rod 401 will rotate around the fixed rod 305 as the axis and compress the first spring 402. When the push block 304 stops moving, the rotating rod 401 will return to its original position under the restoring action of the first spring 402, thereby cooperating with the tooth plate 403 to lock the position of the push block 304 and prevent the push block 304 from moving back, thereby reducing the wound surface and improving the effect of minimally invasive surgery.

[0056] When the blade 5 needs to be replaced, the operator pushes the extension rod 303 out of the surgical knife head 2 through the push block 304, and then presses the long rod 15, so that the long rod 15 moves downward with the top of the movable rod 16, so that the bottom end of the movable rod 16 generates a thrust on the top of the connecting plate 12, pushing the two connecting plates 12 to move opposite to each other along the inner surface of the limiting groove 10 with the limit block 11. At this time, the vertical plate 8 fixedly connected to the connecting plate 12 will move with the clamping rod 7 and compress the second spring 9, so that the clamping rod 7 and the circular hole 6 are separated, and the clamping rod 7 releases the lock on the blade 5, so that the blade 5 can be quickly disassembled, thereby improving the convenience of the minimally invasive scalpel.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] 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 minimally invasive scalpel for carpal tunnel surgery, characterized in that: Included are: A surgical knife handle (1), wherein a surgical knife head (2) is fixedly mounted on the left end of the surgical knife handle (1); A pushing and sliding mechanism (3), wherein the pushing and sliding mechanism (3) is arranged at the top end of the surgical knife handle (1); A positioning mechanism (4), wherein the positioning mechanism (4) is arranged above the surgical knife handle (1); The pushing and sliding mechanism (3) comprises a slide groove (301), wherein the slide groove (301) is provided at the middle of the top of the surgical knife handle (1), the right end of the slide groove (301) is movably sleeved with a slider (302), the bottom end of the slider (302) is fixedly mounted with an extension rod (303), the left end of the extension rod (303) penetrates the surgical knife handle (1) and extends to the outside of the surgical knife handle (1), the outer surface of the extension rod (303) is movably sleeved with the inner surface of the surgical knife handle (1), the top of the outer surface of the slider (302) is fixedly sleeved with a push block (304), the bottom end of the push block (304) is movably connected with the top of the surgical knife handle (1), the left end of the push block (304) is fixedly sleeved with a fixed rod (305), and the push block (304) causes the extension rod (303) to move.

2. A minimally invasive scalpel for carpal tunnel surgery according to claim 1, characterized in that: The positioning mechanism (4) comprises: A rotating rod (401), the rotating rod (401) is movably sleeved on the outer surface of the fixed rod (305), and the outer surface of the rotating rod (401) is movably sleeved on the inner surface of the push block (304); A first spring (402), wherein the first spring (402) is fixedly mounted on the left side of the bottom end of the rotating rod (401), and the other end of the first spring (402) is fixedly connected to the bottom end inside the pushing block (304); A tooth plate (403) is fixedly sleeved on the inner surface of the front end of the surgical knife handle (1), and the top end of the tooth plate (403) is movably connected to the right end of the rotating rod (401).

3. The minimally invasive scalpel for carpal tunnel surgery according to claim 1, characterized in that: A blade (5) is movably sleeved on the inner surface of the middle portion of the front end of the extension rod (303), and a circular hole (6) is provided inside the blade (5).

4. The minimally invasive scalpel for carpal tunnel surgery according to claim 3, characterized in that: The left and right ends of the circular hole (6) are movably sleeved with a clamping rod (7), the number of the clamping rods (7) is two, the outer surfaces of the two clamping rods (7) are movably sleeved with the inner surface of the extension rod (303), the back surfaces of the two clamping rods (7) are respectively fixedly installed with a vertical plate (8), the vertical plate (8) is movably sleeved on the inner surface of the extension rod (303), the number of the vertical plates (8) is two, the back surfaces of the two vertical plates (8) are respectively fixedly installed with a second spring (9), the other end of the second spring (9) is fixedly connected to the inner surface of the extension rod (303).

5. The minimally invasive scalpel for carpal tunnel surgery according to claim 1, characterized in that: Limiting grooves (10) are respectively provided at the upper and lower ends of the inner walls on the left and right sides of the extension rod (303); the limiting blocks (11) are movably sleeved inside the limiting grooves (10); a connecting plate (12) is fixedly installed on the outer surface of the limiting block (11); there are two connecting plates (12); the two connecting plates (12) are movably sleeved inside the upper and lower ends of the extension rod (303); and the rear ends of the two connecting plates (12) are respectively fixedly connected to the front ends of the two vertical plates (8).

6. The minimally invasive scalpel for carpal tunnel surgery according to claim 1, characterized in that: A long slot (13) is provided at the top of the left end of the extension rod (303), and a movable block (14) is movably sleeved at the top end of the long slot (13).

7. A minimally invasive scalpel for carpal tunnel surgery according to claim 6, characterized in that: A long rod (15) is fixedly mounted on the left end of the movable block (14), and movable rods (16) are hingedly connected to the front of the left and right ends of the long rod (15). There are two movable rods (16), and the other ends of the two movable rods (16) are hingedly connected to the top ends of the two connecting plates (12). The movable rods (16) will move the connecting plates (12).

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