A special skin incision scalpel for minimally invasive percutaneous pedicle fixation surgery of spine

Abstract

The utility model relates to medical instrument technical field especially, more particularly to a special skin incision scalpel for spinal surgery minimally invasive percutaneous pedicle fixation operation, include: handle, the far end of handle's screw thread connection sword handle and detachable setting sword blade in the far end of sword handle, wherein, sword handle includes: main body, movable sword handle, fixed sword handle, movable sword handle head, fixed sword handle head and sword blade locking piece, the cavity is opened to main body along main body axial direction direction, the cavity penetrates both ends of main body, movable sword handle is slidably arranged in the cavity, fixed sword handle is fixedly arranged in the cavity, the proximal end of movable sword handle is fixedly provided with first screw thread connection part, the utility model is more stable, more accurate for the operator to apply force, avoids the risk brought by improper force, reduces operation difficulty and risk, and comprehensively improves the safety and quality of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a special skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery. Background Technology

[0002] In the field of spinal surgery, the performance of surgical instruments plays a crucial role in the success of the operation and the patient's prognosis. As one of the most commonly used instruments in spinal surgery, the design and optimization of the scalpel have always been a key research focus in this field. Traditional minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery uses conventional 15-gauge round blades or 11-gauge pointed blades. However, this method has several drawbacks, such as low cutting efficiency, inability to penetrate the fascia layer, poor control over incision size, irregular cut edges, and severe postoperative scar hyperplasia. These problems increase the difficulty and risk of the surgery, prolong the operation time, and affect the patient's healing and recovery.

[0003] Therefore, there is a need for a special skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery that can perform precise cutting, control force application, and improve efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery includes: a handle, a handle threaded to the distal end of the handle, and a blade detachably disposed at the distal end of the handle.

[0007] The tool holder includes: a main body, a movable tool holder, a fixed tool holder, a movable tool holder head, a fixed tool holder head, and a blade locking component;

[0008] The main body has a cavity along the axial direction of the main body, the cavity extends through both ends of the main body, the movable tool holder is slidably disposed in the cavity, the fixed tool holder is fixedly disposed in the cavity, and the proximal end of the movable tool holder is fixedly provided with a first threaded connection part;

[0009] The proximal end face of the first threaded connection part is provided with a threaded hole along the axial direction of the first threaded connection part, and the distal end face of the handle is provided with a second threaded connection part along the axial direction of the tool holder. The second threaded connection part is threadedly engaged with the threaded hole, and there is a gap between the distal end face of the first threaded connection part and the proximal end face of the fixed tool holder.

[0010] The proximal end of the movable tool holder head is fixedly connected to the distal end of the movable tool holder, and the proximal end of the fixed tool holder head is fixedly connected to the distal end of the fixed tool holder. The movable tool holder head and the fixed tool holder head abut against each other to form a cone. The outer diameter of the distal end of the cone is larger than the outer diameter of the proximal end of the cone. The blade is detachably mounted on the side where the movable tool holder head and the fixed tool holder head abut against each other.

[0011] The blade locking component is cylindrical and is threadedly fitted onto the outer surface of the near end of the conical body.

[0012] The main body has a through groove on its side wall, which runs through the main body and the fixed tool holder. A pusher is slidably installed in the through groove and is fixed to the movable tool holder by bolts.

[0013] Furthermore, the handle has: a handle body, a thumb grip, an index finger grip, a middle finger grip, a ring finger grip, and a little finger grip.

[0014] Furthermore, a limiting element is fixedly provided on the side where the movable tool holder head abuts against the fixed tool holder head, and a limiting hole is opened on one side of the near end of the blade, with the limiting element matching the limiting hole.

[0015] Furthermore, the outer walls of the thumb grip, index finger grip, middle finger grip, ring finger grip, and little finger grip are all covered with an anti-slip layer.

[0016] Furthermore, the blade has a cutting edge length of 30mm-35mm, a cutting edge width of 4mm-6mm, and a cutting edge angle of 25°-30°.

[0017] Furthermore, a first spring is provided between the distal end of the first threaded connection and the proximal end of the fixed tool holder.

[0018] Furthermore, the length of the through groove is equal to the distance between the distal end face of the first threaded connection and the proximal end face of the fixed tool holder.

[0019] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0020] This invention features a detachable and fixed pusher and handle, allowing surgeons to quickly replace the blade for efficient cutting. In terms of incision control, it precisely controls the incision size, producing clean edges, effectively solving the problems of poor incision size control and uneven edges associated with traditional scalpels. This reduces postoperative scar hyperplasia and promotes better postoperative recovery for patients. The anti-slip layers on the handle's gripping parts allow the surgeon to apply force more steadily and precisely, avoiding risks associated with improper force application, reducing surgical difficulty and risk, and comprehensively improving the safety and quality of the surgery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the axial side structure of this utility model;

[0022] Figure 2 This is a top view of the cross-sectional structure of the present invention;

[0023] Figure 3 This is a side view of the cross-sectional structure of the present invention;

[0024] Figure 4 This is a top view of the structure of this utility model;

[0025] Figure 5 This is an enlarged view of the structure of region A in this utility model;

[0026] Figure 6 This is an enlarged view of the structure of region B in this utility model;

[0027] Figure 7 This is an enlarged view of the structure of region C in this utility model;

[0028] Figure 8 This is a schematic diagram of the blade structure in this utility model;

[0029] Figure 9 This is a schematic diagram of the handle structure in this utility model;

[0030] The reference numerals in the attached figures are:

[0031] 1. Handle; 2. Knife handle; 3. Blade; 21. Main body; 22. Movable handle; 23. Fixed handle; 25. Movable handle head; 26. Fixed handle head; 24. Blade locking component; 9. First threaded connection; 10. First spring; 5. Push component; 6. Through groove; 7. Bolt; 11. Handle body; 12. Second threaded connection; 111. Thumb grip; 112. Index finger grip; 113. Middle finger grip; 114. Ring finger grip; 115. Little finger grip; 251. Limiting component; 31. Limiting hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0035] Example

[0036] This embodiment provides a specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery, as shown in the attached figure. Figures 1-9 As shown: It includes: a handle 1, a knife handle 2 threaded to the distal end of the handle 1, and a blade 3 detachably disposed at the distal end of the knife handle 2;

[0037] The handle 1 has: a handle body 11, a thumb grip 111, an index finger grip 112, a middle finger grip 113, a ring finger grip 114, and a little finger grip 115;

[0038] The outer walls of the thumb grip 111, the index finger grip 112, the middle finger grip 113, the ring finger grip 114, and the little finger grip 115 are all covered with an anti-slip layer to prevent the surgeon's hand from slipping. The ergonomic design of the handle 1 and the anti-slip layer ensure that the surgeon feels comfortable during long surgical operations and reduces fatigue.

[0039] The knife handle 2 includes: a main body 21, a movable knife handle 22, a fixed knife handle 23, a movable knife handle head 25, a fixed knife handle head 26, and a blade locking member 24.

[0040] The main body 21 has a cavity along the axial direction of the main body 21, the cavity passes through both ends of the main body 21, the movable handle 22 is slidably disposed in the cavity, the fixed handle 23 is fixedly disposed in the cavity, and the proximal end of the movable handle 22 is fixedly provided with a first threaded connection part 9.

[0041] The proximal end face of the first threaded connection part 9 is provided with a threaded hole along the axial direction of the first threaded connection part 9, and the distal end face of the handle 1 is provided with a second threaded connection part 12 along the axial direction of the knife handle 2. The second threaded connection part 12 is threadedly engaged with the threaded hole, and there is a gap between the distal end face of the first threaded connection part 9 and the proximal end face of the fixed knife handle 23.

[0042] The proximal end of the movable handle head 25 is fixedly connected to the distal end of the movable handle 22, and the proximal end of the fixed handle head 26 is fixedly connected to the distal end of the fixed handle 23. The movable handle head 25 and the fixed handle head 26 abut against each other to form a cone shape. The outer diameter of the distal end of the cone shape is larger than the outer diameter of the proximal end of the cone shape. The blade 3 is detachably disposed on the side where the movable handle head 25 and the fixed handle head 26 abut against each other.

[0043] The blade locking member 24 is cylindrical and is threadedly fitted onto the outer surface of the proximal end of the cone. The blade locking member 24 is used to lock the blade 3 and prevent it from loosening during the operation.

[0044] The main body 21 has a through groove 6 on its side wall, and the through groove 6 passes through the main body 21 and the fixed handle 23. A pusher 5 is slidably arranged in the through groove 6, and the pusher 5 is detachably fixed to the movable handle 22 by bolts 7.

[0045] A first spring 10 is provided between the distal end of the first threaded connection portion 9 and the proximal end of the fixed handle 23.

[0046] The length of the through groove 6 is equal to the distance between the distal end face of the first threaded connection portion 9 and the proximal end face of the fixed tool holder 23.

[0047] In this design, a limiting member 251 is fixedly provided on the side of the movable scalpel head 25 that abuts against the fixed scalpel head 26, and a limiting hole 31 is provided on one side of the proximal end of the blade 3. The limiting member 251 matches the limiting hole 31 to prevent the blade from loosening or shifting during the operation, thus ensuring the continuity and safety of the surgical operation.

[0048] In a preferred embodiment, the blade has a cutting edge length of 30mm, a cutting edge width of 4mm, and a cutting edge angle of 25°.

[0049] In a preferred embodiment, the blade has a cutting edge length of 35mm, a cutting edge width of 6mm, and a cutting edge angle of 30°.

[0050] In use, without connecting the handle 1, rotate the blade locking member 24 towards the near end to separate the fixed handle head 26 from the movable handle head 25. At this time, the movable handle 22 can slide freely in the cavity of the main body 21. Push the pusher 5 towards the far end. The pusher, through the bolt 7, moves the movable handle 22 towards the far end, so that the movable handle head 25 is fully extended. At this time, the mounting position of the blade 3 is released, making it easy to remove the old blade or install the new blade. Remove the old blade 3 and install the new blade, ensuring that the limiting hole 31 on the blade is aligned and matched with the limiting member 251 on the movable handle head 25 to ensure stable installation of the blade. After the blade replacement is completed, release the pusher 5, and the first spring 1... 0 will automatically drive the movable handle 22 to return to the proximal end, so that the movable handle head 25 retracts into the body 21. When the movable handle head 25 retracts to the appropriate position, the second threaded connection part 12 of the handle 1 is screwed into the threaded hole of the first threaded connection part 9 to complete the connection between the handle 1 and the handle 2, and fix the movable handle 22. Rotate the blade locking part 24 to the distal end so that it is tightly fitted on the proximal end of the vertebral body, and firmly fix the blade 3 between the fixed handle head 26 and the movable handle head 25 to ensure that the blade will not loosen during the operation.

[0051] The operator holds handle 1, with their fingers placed on the thumb grip 111, index finger grip 112, middle finger grip 113, ring finger grip 114, and little finger grip 115 respectively.

[0052] In summary, the detachable and fixed pusher and handle of this invention allow surgeons to quickly replace the blade for efficient cutting. Regarding incision control, it precisely controls the incision size, producing clean edges, effectively solving the problems of poor incision size control and uneven edges associated with traditional scalpels. This reduces postoperative scar hyperplasia and promotes better postoperative recovery for patients. The anti-slip layers on the handle's gripping parts allow surgeons to apply force more steadily and precisely, avoiding risks associated with improper force application, reducing surgical difficulty and risk, and comprehensively improving the safety and quality of the surgery.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery, characterized in that, include: Handle (1), knife handle (2) threaded to the distal end of the handle (1), and blade (3) detachably disposed at the distal end of the knife handle (2). The knife handle (2) includes: a main body (21), a movable knife handle (22), a fixed knife handle (23), a movable knife handle head (25), a fixed knife handle head (26), and a blade locking member (24). The main body (21) has a cavity along the axial direction of the main body (21), the cavity passes through both ends of the main body (21), the movable handle (22) is slidably disposed in the cavity, the fixed handle (23) is fixedly disposed in the cavity, and the proximal end of the movable handle (22) is fixedly provided with a first threaded connection part (9). The proximal end face of the first threaded connection part (9) is provided with a threaded hole along the axial direction of the first threaded connection part (9), and the distal end face of the handle (1) is provided with a second threaded connection part (12) along the axial direction of the tool holder (2). The second threaded connection part (12) is threadedly engaged with the threaded hole, and there is a gap between the distal end face of the first threaded connection part (9) and the proximal end face of the fixed tool holder (23). The proximal end of the movable handle head (25) is fixedly connected to the distal end of the movable handle (22), and the proximal end of the fixed handle head (26) is fixedly connected to the distal end of the fixed handle (23). The movable handle head (25) and the fixed handle head (26) abut against each other to form a cone. The outer diameter of the distal end of the cone is larger than the outer diameter of the proximal end of the cone. The blade (3) is detachably disposed on the side where the movable handle head (25) and the fixed handle head (26) abut against each other. The blade locking member (24) is cylindrical and is threadedly fitted onto the outer surface of the near end of the cone. The main body (21) has a through groove (6) on its side wall, and the through groove (6) passes through the main body (21) and the fixed handle (23). A pusher (5) is slidably arranged in the through groove (6), and the pusher (5) is detachably fixed to the movable handle (22) by bolts (7).

2. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 1, characterized in that, The handle (1) has: a handle body (11), a thumb grip (111), an index finger grip (112), a middle finger grip (113), a ring finger grip (114), and a little finger grip (115).

3. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 1, characterized in that, A limiting member (251) is fixedly provided on the side of the movable handle head (25) that abuts against the fixed handle head (26), and a limiting hole (31) is opened on one side of the near end of the blade (3), and the limiting member (251) matches the limiting hole (31).

4. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 2, characterized in that, The outer wall of the thumb grip (111), the outer wall of the index finger grip (112), the outer wall of the middle finger grip (113), the outer wall of the ring finger grip (114), and the outer wall of the little finger grip (115) are all covered with an anti-slip layer.

5. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 1, characterized in that, The blade (3) has a blade length of 30mm-35mm, a blade width of 4mm-6mm, and a blade angle of 25°-30°.

6. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 1, characterized in that, A first spring (10) is provided between the distal end of the first threaded connection (9) and the proximal end of the fixed tool holder (23).

7. A specialized skin incision scalpel for minimally invasive percutaneous pedicle screw fixation surgery in spinal surgery according to claim 1, characterized in that, The length of the through groove (6) is equal to the distance between the far end face of the first threaded connection (9) and the near end face of the fixed tool holder (23).

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