Cervical spine anterior approach ligament cutting and releasing push knife

Abstract

The application relates to the technical field of medical instruments, and discloses a cervical vertebra anterior path ligament cutting and loosening push knife, which comprises a long handle, a cutting knife, and a stripper head mounted at one end of the long handle, the long handle is provided with a sliding and pushing assembly, the sliding and pushing assembly is matched with the cutting knife, and the blade moves along the length direction of the long handle. The application can stop the cutting knife at any time, can accurately control the cutting depth and position, and improves the accuracy and safety of surgery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a cervical anterior ligament cutting and releasing push knife. BACKGROUND

[0002] In cervical anterior surgery, ligament cutting and releasing is one of the common steps. The anterior ligament includes the anterior longitudinal ligament, the yellow ligament and other ligament structures located in the front of the cervical spine. For example, the anterior longitudinal ligament is located in the front of the cervical spine and is relatively easy to expose. It is a bundle of firm fiber bundles extending in front of the vertebral body and is one of the longest and thickest ligaments in the human body. Therefore, when releasing, the surgeon can directly reach the anterior longitudinal ligament through the anterior surgical incision, and the surgeon will use a sharp surgical instrument (such as a blade, a bone knife, etc.) to cut along the predetermined cutting line. Since the anterior longitudinal ligament is relatively easy to expose, the cutting operation is relatively simple.

[0003] There are now medical devices that combine the functions of ligament stripping and cutting, including a long strip-shaped stripper body and a blade movably mounted on the stripper body. One end of the stripper body is a handle, and the other end is a stripping portion. The blade can be manually or automatically controlled to cut the ligament stripped by the stripping portion.

[0004] In view of the above related technology, although stripping and cutting can now be performed on one instrument, in actual operation, the stripping portion needs to maintain the state of lifting the ligament before the ligament is cut. When holding the stripper body with one hand, the blade also needs to be pushed. If the hand shakes during the operation process, the ligament may leave or deviate from the stripping portion, causing the blade to not necessarily cut the ligament. SUMMARY

[0005] In order to enable the blade to accurately cut the lifted ligament, the present application provides a cervical anterior ligament cutting and releasing push knife.

[0006] The present application provides a cervical anterior ligament cutting and releasing push knife, which adopts the following technical solution:

[0007] The cervical anterior ligament cutting and releasing push knife comprises a long handle, a cutting knife, and a stripper head mounted at one end of the long handle. The long handle is provided with a sliding and pushing assembly. The sliding and pushing assembly cooperates with the cutting knife. The blade moves along the length direction of the long handle.

[0008] By adopting the above technical solution, when the doctor operates, the sliding and pushing assembly is manually controlled to push the cutting knife. The cutting force and speed of the cutting knife can be finely adjusted. When the ligament is lifted by the stripper head, the process of pushing the cutting knife can be observed whether the ligament is aligned with the stripper head. If the ligament deviates from the stripper head, the cutting knife can be stopped at any time. The cutting depth and position can also be accurately controlled, thereby improving the accuracy and safety of the operation.

[0009] Optionally, the sliding assembly includes a push rod, and the cutter is mounted on the end of the push rod.

[0010] By adopting the above technical solution, the push rod has a certain length, and the cutter is installed on the end of the push rod, which can reduce the entire moving stroke, making it more convenient for the doctor to operate.

[0011] Optionally, the handle is provided with a sliding track, and the push rod is slidably installed in the sliding track.

[0012] By adopting the above technical solution, the stability of the push rod during the sliding process is ensured, the cutter is prevented from deflecting or shaking during the cutting process, and the accuracy and safety of the operation are further improved.

[0013] Optionally, the sliding push assembly further includes a push block, which is fixedly mounted on the push rod.

[0014] By adopting the above technical solution, the design of the push block increases the convenience of operation. The doctor can indirectly control the movement of the cutter by pushing the push block, making the operation simpler and faster.

[0015] Optionally, the push rod is provided with a mounting groove for mounting a push block, and one end of the cutter is inserted into the mounting groove.

[0016] By adopting the above technical solution, the connection between the cutter and the push block and push rod is made more stable, thereby ensuring stability and reliability during the cutting process.

[0017] Optionally, the sliding assembly further includes a push block, which is slidably mounted on the push rod, the cutter is connected to the push block, the cutter is attached to the push rod, and the friction between the push block and the push rod is greater than the friction between the push rod and the long handle.

[0018] By adopting the above technical solution, the push block is slidably mounted on the push rod, the cutter is connected to the push block, and the cutter fits on the push rod. This design allows the cutter to maintain a close fit with the push rod during the sliding process, improving the accuracy and stability of the cutting. At the same time, the friction between the push block and the push rod is greater than the friction between the push rod and the long handle. When the push rod moves to the limit, the cutter is close to the ligament but has not yet cut the ligament. If the hand shakes and the ligament moves away during this process, it does not matter. The position of the ligament can be confirmed again before the cutter cuts the ligament. The push block then pushes the cutter a small distance, and the cutter can cut the ligament. The pushing stroke is very short, only about two millimeters away from the ligament at most. During the pushing process, the handle shake is avoided as much as possible, thereby ensuring the accuracy and controllability of the cutting operation.

[0019] Optionally, the push rod is provided with a receiving groove for accommodating the cutter, the cutter is attached to the wall of the receiving groove, the push rod is provided with a travel groove for the push block to slide, the push block is always located in the travel groove, and one end of the cutter is inserted into the travel groove and connected to the push block.

[0020] By adopting the above technical solution, the push block is always located in the stroke groove, and the stroke groove limits the sliding stroke of the push block. When the push block only pushes the cutter to move, the sliding distance of the cutter is also controlled, so that the cutter can accurately cut the ligament without easily damaging other tissues. The cooperation between the cutter and the push rod enables the cutter to maintain a stable position and angle during the sliding process, further improving the accuracy and stability of the cutting. The friction between the cutter and the push rod can also enable the cutter to slide stably along with the sliding of the push rod. When the push rod slides to the limit, continue to apply force to the push block, and the push knife will cut the ligament.

[0021] Optionally, the cutter end has a cutting portion and an arc portion.

[0022] By adopting the above technical solution, the cutting portion is used to perform precise cutting operations, while the arc-shaped portion can play a role of stripping and loosening during the cutting process, making the surgical process smoother and more efficient.

[0023] Optionally, the stripper head includes a hook divided into two, and a cutting groove is provided between the two hooks.

[0024] By adopting the above technical solution, when the hook is divided into two and peeling the ligament, the ligament can remain stretched and wait for the cutter to cut. When cutting, the cutter passes through the cutting groove, so that the ligament can be completely separated, and the cutter only cuts the ligament and does not involve other tissues.

[0025] In summary, this application has at least one of the following beneficial effects:

[0026] 1. The design of the anterior cervical ligament cutting and release push blade makes the surgical process more precise, safe and efficient. Through the cooperation of the sliding push assembly and the cutter, the doctor can precisely control the cutting depth and position, improving the accuracy and safety of the operation.

[0027] 2. During the sliding of the push rod, if the hand shakes and causes the ligament to move away, it does not matter. The cutter will not be able to cut the ligament. When the push rod abuts the sliding track, the position of the ligament can be confirmed again before the cutter cuts the ligament. The push block pushes the cutter to move a small distance, and the cutter can cut the ligament. The pushing stroke is very short, and the shaking of the hand and the long handle is avoided as much as possible during the pushing period, thereby ensuring the accuracy and controllability of the cutting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1is a schematic diagram of the overall structure of embodiment 1 of the present application;

[0029] Figure 2 is Figure 1 an enlarged schematic diagram of A in

[0030] Figure 3 is a schematic diagram of the structure of the push rod and cutter cooperation of embodiment 1 of the present application;

[0031] Figure 4 is an exploded schematic diagram of the push rod and cutter of embodiment 1 of the present application;

[0032] Figure 5 is a schematic diagram of the long handle structure of embodiment 1 of the present application;

[0033] Figure 6 is a schematic diagram of embodiment 1 of the present application, which embodies the sliding push assembly close to the head of the stripper;

[0034] Figure 7 is a schematic diagram of the specific structure of the limiting member of embodiment 1 of the present application;

[0035] Figure 8 is a sectional view of the overall structure of embodiment 2 of the present application;

[0036] Figure 9 is a sectional view of the cutter and push rod cooperation of embodiment 2 of the present application.

[0037] BRIEF DESCRIPTION OF THE DRAWINGS: 10, long handle; 11, sliding rail; 12, guide groove; 13, accommodation groove; 14, sliding groove; 20, cutter; 21, plug-in section; 22, cutting part; 23, arc-shaped part; 30, head of stripper; 31, hook; 32, cutting groove; 40, sliding push assembly; 41, push rod; 411, mounting groove; 412, limiting member; 413, stroke groove; 414, accommodating groove; 4121, connecting part; 4122, limiting part; 42, push block; 421, arc-shaped groove. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying Figure 1-9 The present application will be further described in detail.

[0039] Embodiment 1

[0040] This embodiment discloses a cervical spine anterior approach ligament cutting and releasing push knife, the structure is shown in the accompanying Figure 1 The long handle 10 is a rod-shaped structure, and the long handle 10 is specially provided with a sliding push assembly 40, which includes a push rod 41, one end of the push rod 41 being connected with the cutter 20.

[0041] Referring to Figure 2The stripper head 30 is designed with a curved hook 31 divided into two halves, with a cutting groove 32 defined between the two hooks 31. The combination of the two curved hooks 31 and the cutting groove 32 provides the entire stripper head 30 with a certain width, which allows the stripped ligament to remain stretched on the stripper head 30. When the cutter 20 is inserted into the cutting groove 32 to cut the ligament, the ligament is completely cut without affecting other tissues.

[0042] In addition, refer to Figure 3 The sliding assembly 40 further includes a push block 42, which is fixed to the push rod 41. The push block 42 is provided with an arcuate groove 421 for fingertips to apply force. This design effectively improves the stability of the push rod 41 during operation, allowing the push rod 41 to move more smoothly within the sliding track 11 during the pushing process, further improving cutting accuracy.

[0043] Reference Figure 4 In this design, the push rod 41 of the sliding assembly 40 features a mounting slot 411. The cutter 20 includes a long, strip-shaped insertion section 21, which inserts into this slot 411, forming a secure connection. This structural design ensures that the cutter 20 and the push rod 41 maintain complete synchronization during the push process, effectively ensuring accurate ligament cutting and the overall effectiveness of the surgery.

[0044] Furthermore, the end of the cutter 20 is specially designed to have a cutting portion 22 and an arcuate portion 23, with a smooth transition between the arcuate portion 23 and the cutting portion 22. The cutting portion 22 is primarily used for cutting ligaments. The cutting portion 22 is relatively thin, while the arcuate portion 23 mainly serves as a guide. When cutting ligaments, it can effectively avoid unnecessary damage to surrounding tissues, further improving the safety of the operation.

[0045] Reference Figure 5 and Figure 6 The long handle 10 defines a sliding track 11, into which the push rod 41 slides. The sliding track 11 extends along the length of the long handle 10. One end of the sliding track 11 is closed. A guide groove 12 extends from the end of the sliding track 11 near the stripping head 30. The cutter 20 slides into the guide groove 12 as the push rod 41 moves.

[0046] Reference Figure 7In order to make the push rod 41 slide stably on the long handle 10, the side of the push rod 41 facing away from the push block 42 is connected to the limiting member 412, and the limiting member 412 includes a connecting portion 4121 and a limiting portion 4122. The connecting portion 4121 and the limiting portion 4122 are both chamfered rectangular structures. The cross-section of the connecting portion 4121 is smaller than the cross-section of the limiting portion 4122. One end face of the connecting portion 4121 is fixedly connected to the push rod 41, and the other end face opposite to the connecting portion 4121 is fixedly connected to the limiting portion 4122.

[0047] Reference Figure 6 and Figure 7 The long handle 10 has a clearance groove 13 within the sliding rail 11 for the stopper 412 to pass through, as well as a chute 14 for only the connecting portion 4121 to pass through. The chute 14 is distributed along the length of the long handle 10. The clearance groove 13 is located at the end of the chute 14 away from the stripper head 30, and the clearance groove 13 and the chute 14 are interconnected. When the sliding assembly 40 is installed on the long handle 10, when the connecting portion 4121 is located within the clearance groove 13, a gap is left between the connecting portion 4121 and the inner wall of the clearance groove 13. The push rod 41 remains within the sliding rail 11. Pushing the sliding assembly 40 allows the entire sliding assembly 40 to continuously approach the stripper head 30 along the sliding rail 11, and the connecting portion 4121 can slide accurately into the chute 14. When the push rod 41 abuts the end of the sliding rail, the connecting portion 4121 abuts the end of the chute 14 near the stripper head 30. However, when the limiting member 412 is located in the clearance groove 13, when the limiting member 412 is pushed to move in the direction of the sliding track 11, the entire sliding assembly 40 can take the cutter 20 away from the long handle 10, thereby, the cutter 20 can be replaced.

[0048] In actual operation of Example 1 of the present application, the doctor holds the long handle 10, first peels and lifts the ligament with the dissector head 30, and then uses the thumb to control the sliding assembly 40, thereby pushing the cutter 20 to move along the length direction of the long handle 10. The cutting force and speed of the cutter 20 can be finely controlled. While moving, observe whether the ligament remains straight. When the connecting portion 4121 abuts against the end of the slide groove 14, the cutter 20 achieves precise cutting of the anterior cervical ligament.

[0049] Example 2

[0050] The difference between Example 2 and Example 1 is that the push block 42 and the push rod 41 are matched in a different way, and the other principles are basically the same. Figure 8 and Figure 9The push block 42 is slidably mounted on the push rod 41. The push rod 41 is provided with a travel groove 413 for the push block 42 to slide. The push block 42 partially extends into the travel groove 413. The portion of the push block 42 extending into the travel groove 413 and the wall of the receiving groove 414 are in close contact with each other, forming a certain friction force. The portion of the push block 42 extending into the travel groove 413 is always located within the travel groove 413. The length of the travel groove 413 limits the movement of the push block 42. The push rod 41 is provided with a receiving groove 414 for accommodating the cutter 20. The receiving groove 414 is only for the cutter 20 to pass through. The travel groove 413 and the receiving groove 414 are interconnected. The width of the travel groove 413 is greater than the width of the receiving groove 414. The plug-in section 21 of the cutter 20 located in the push rod 41 extends into the travel groove 413 and is then plugged into the push block 42.

[0051] After the cutter 20 is inserted into the push rod 41, it fits tightly against the wall of the receiving groove 414, increasing the friction between the cutter 20 and the push rod 41. Because the cutter 20 is connected to the push block 42, the friction between the push block 42 and the push rod 41 is also indirectly increased. After the push block 42 and the cutter 20 are combined, the friction between them and the push rod 41 is relatively large. When the push block 42 is pushed, if the push rod 41 does not abut the end of the sliding rail 11 near the stripper head 30, the push block 42 cannot directly push the cutter 20, and the cutter 20 slides along with the sliding of the push rod 41.

[0052] When the push rod 41 abuts the end of the sliding track 11, the connecting portion 4121 abuts the end of the slide slot 14. The push block 42 can no longer push the push rod 41. As the push block 42 continues to push, it pushes the cutter 20 along the travel groove 413 to sever the ligament. When the push block 42 abuts the end of the travel groove 413, the cutter 20 severs the ligament, and the cutting portion 22 of the cutter 20 is located within the cutting groove 32 and does not protrude outside of the cutting groove 32.

[0053] In actual operation of Example 2 of the present application, after the ligament is exfoliated using the exfoliator head 30, the push block 42 pushes the push rod 41 to slide, and the cutter 20 slides along with the push rod 41. When the push rod 41 reaches one end of the sliding track 11, the cutting portion 22 of the cutter 20 is very close to the ligament. At this point, it is possible to re-assure whether the ligament remains stretched in the exfoliator head 30, awaiting cutting, and then decide whether to push the push block 42 to allow the cutter 20 to sever the ligament. Because the cutter 20 has a very short travel distance, only about two millimeters from the ligament at most, shaking of the long handle 10 is minimized during the movement of the cutter 20, thereby ensuring precision and controllability of the cutting operation.

[0054] Both of the above embodiments fully utilize the technical essence and design ideas of this application. Through the meticulous design and optimization of various parts of the push blade, the accuracy and efficiency of ligament cutting surgery are significantly improved, while also improving the safety of the surgery. Therefore, all equivalent changes based on the structure, shape, and principles of this application shall be covered by the scope of protection of this application.

Claims

1. Anterior cervical ligament cutting and releasing scalpel, characterized by: It includes a long handle, a cutter, and a stripping sub-head installed at one end of the long handle. The long handle is provided with a sliding push assembly. The sliding push assembly cooperates with the cutter, and the cutter moves along the length direction of the long handle. The sliding push assembly includes a push rod, and the cutter is mounted on the end of the push rod; The sliding push assembly further comprises a push block, which is slidably mounted on the push rod, the cutter is connected to the push block, and the cutter is attached to the push rod, and the friction between the push block and the push rod is greater than the friction between the push rod and the long handle; The push rod is provided with a receiving groove for accommodating the cutter, and the cutter is attached to the wall of the receiving groove. The push rod is provided with a travel groove for the push block to slide, and the push block is always located in the travel groove. One end of the cutter penetrates the travel groove and is connected to the push block.

2. The anterior cervical ligament cutting and releasing razor according to claim 1, characterized in that: The handle is provided with a sliding track, and the push rod is slidably installed in the sliding track.

3. The anterior cervical ligament cutting and releasing razor according to claim 1, characterized in that: The cutter end has a cutting portion and an arc portion.

4. The cervical anterior ligament cutting and releasing razor according to claim 3, characterized in that: The stripper head comprises a curved hook divided into two, and a cutting groove is provided between the two curved hooks.

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