Working cannula for cervical endoscopic surgery

Abstract

The utility model relates to the field of medical instruments, and discloses a working cannula for cervical endoscopic surgery, which comprises a cannula main body provided with a through hole, a first opening of the cannula main body is obliquely arranged, one side, close to a second opening of the cannula main body, of the first opening is defined as a first side, and one side, far away from the second opening, of the first opening is defined as a second side; the sleeve main body is provided with a limiting thread above the first opening, and the limiting thread is matched with the limiting ring to adjust and control the working depth of the sleeve main body; the limiting threads are arranged and matched with the limiting ring, so that the movement of the cannula body can be well limited, the depth of the cannula placed in the intervertebral space is controlled and stabilized during operation, the situation that the cannula body is too deep to penetrate the rear wall of the intervertebral disc and damage the spinal cord is avoided, the operation risk is reduced, and related complications of spinal cord injury are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a working cannula for cervical endoscopic surgery. Background Technology

[0002] In existing techniques, ACDF (anterior cervical discectomy and fusion) is mainly performed under direct vision, with the aid of a microscope, and with the assistance of a cervical endoscope. Under microscope guidance, instruments such as nucleus pulposus forceps and reamers are used. Under cervical endoscopy, minimally invasive systems and instruments are employed, magnifying the surgical field and allowing for more precise surgical procedures. With the development of minimally invasive spinal surgery, ACDF under cervical endoscopy has become an increasingly common surgical method for treating cervical spondylosis.

[0003] However, in existing endoscopic-assisted ACDF surgery, the endoscope working cannula used is not specifically designed for ACDF surgery. Due to its excessive length, the depth of operation during the operation is not well controlled, and the end of the cannula is very likely to break through the posterior edge of the vertebral body and damage the spinal cord nerves, thus causing postoperative spinal cord complications. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to limit the working depth of the working sleeve. In order to solve the above technical problem, this utility model provides a working sleeve for cervical endoscopic surgery, including a sleeve body with a through hole. The first opening of the sleeve body is inclined. The side of the first opening that is close to the second opening of the sleeve body is defined as the first side, and the side that is far away from the second opening is defined as the second side.

[0005] The casing body has a limiting thread above the first opening, and the limiting thread cooperates with a limiting ring to adjust and control the working depth of the casing body.

[0006] Preferably, the sleeve body has a first handle and a second handle symmetrically arranged on the side wall near the second opening, and the axis of the first handle and the axis of the second handle are both perpendicular to the central axis of the sleeve body.

[0007] Preferably, both the outer surfaces of the first handle and the second handle are provided with anti-slip textures.

[0008] Preferably, the diameter of the first handle is smaller than the diameter of the second handle.

[0009] Preferably, the first handle is positioned directly above the first side, and the second handle is positioned directly above the second side.

[0010] Preferably, the end face of the first opening is provided with an annular blade, and the cutting surface of the annular blade is located inside the sleeve body.

[0011] Preferably, the sleeve body has a thickening layer on the outer side corresponding to the second side for thickening the sleeve wall.

[0012] Preferably, the distance between the bottom of the limiting thread and the first opening is in the range of 10mm to 30mm.

[0013] Preferably, the pitch of the limiting thread is 1 mm and the number of thread turns is 20.

[0014] Compared with the prior art, the working cannula for cervical endoscopic surgery provided in this embodiment of the utility model has the following advantages:

[0015] In this embodiment, by setting a limiting thread and using a limiting ring, the movement of the cannula body can be effectively restricted, ensuring that the depth of the cannula body inserted into the intervertebral space is controlled and stabilized during the operation, avoiding the cannula from penetrating the posterior wall of the intervertebral disc too deeply, damaging the spinal cord nerves, reducing surgical risks, and reducing spinal cord injury-related complications. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a three-dimensional view of the present invention.

[0018] In the figure: 1. Sleeve body; 2. First opening; 21. First side; 22. Second side; 23. Annular blade; 24. Thickened layer; 3. Second opening; 4. Limiting thread; 5. First handle; 6. Second handle; 7. Anti-slip texture. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0020] like Figure 1 and Figure 2 As shown, a preferred embodiment of the present invention provides a working cannula for cervical endoscopic surgery, including a cannula body 1 with a through hole. The first opening 2 of the cannula body 1 is inclined. The side of the first opening 2 that is close to the second opening 3 of the cannula body 1 is defined as the first side 21, and the side that is away from the second opening 3 is defined as the second side 22.

[0021] The casing body 1 is provided with a limiting thread 4 above the first opening 2. The limiting thread 4 cooperates with the limiting ring to adjust and control the working depth of the casing body 1.

[0022] Specifically, in traditional techniques, the cannula is often too long, making it difficult to control its working depth during surgery. If the cannula extends too far, the end of the cannula may break through the posterior edge of the vertebral body and damage the spinal cord. In this embodiment, a limiting thread 4 is additionally provided on the outer wall of the cannula body 1. The limiting thread 4, in conjunction with a limiting ring (not shown in the figure, the limiting ring is an annular structure with an internal thread on the inner side, which can be fixedly connected to a fixed support rod or fixedly connected to the equipment to maintain the stability of the position of the limiting ring, so that the cannula body 1 can only rotate within the limiting ring to achieve up and down movement. The limiting ring is not part of the cannula structure), can stably control the position of the cannula body 1. When it is necessary to adjust the position of the cannula body 1, the cannula body 1 can be turned to rotate relative to the limiting ring, so that the cannula body 1 can move up or down along the axis of the limiting ring, thereby realizing the adjustment of the position of the cannula body 1. After the position of the cannula body 1 is adjusted, the cannula body 1 will not fluctuate in the up and down position due to external vibration or hand tremors under the restriction of the limiting thread 4. The working position of the cannula body 1 is more stable and less likely to fluctuate and cause damage to the patient. The first opening 2 is tilted to facilitate the insertion of the cannula body 1 into the patient's body, reduce resistance, and facilitate the operation.

[0023] In some embodiments, the sleeve body 1 is symmetrically provided with a first handle 5 and a second handle 6 on the side wall near the second opening 3, and the axis of the first handle 5 and the axis of the second handle 6 are both perpendicular to the central axis of the sleeve body 1.

[0024] Specifically, the first handle 5 and the second handle 6 are designed to facilitate the adjustment of the working depth of the cannula body 1 during surgery. When it is necessary to adjust the position of the cannula body 1, the user can hold the first handle 5 and the second handle 6 with both hands respectively and apply force in opposite directions so that the cannula body 1 can rotate better, and thus the working depth of the cannula body 1 can be adjusted better.

[0025] In some embodiments, the outer surfaces of both the first handle 5 and the second handle 6 are provided with anti-slip textures 7. The anti-slip textures 7 increase the friction between the first handle 5 and the second handle 6 and the user's palm, making it easier for the user to adjust the working depth of the sleeve body 1 and to drive the sleeve body 1 to rotate more conveniently. In some embodiments, the anti-slip textures 7 are multiple annular grooves arranged in an array; in other embodiments, the anti-slip textures 7 can also be multiple densely arranged soft protrusions, threaded grooves, etc., or anti-slip rubber sleeves or other structures can be fitted onto the first handle 5 and the second handle 6.

[0026] In some embodiments, the diameter of the first handle 5 is smaller than the diameter of the second handle 6. Furthermore, the first handle 5 is positioned directly above the first side 21, and the second handle 6 is positioned directly above the second side 22.

[0027] Specifically, during use, because the first opening 2 of the cannula body 1 needs to be inserted into the patient's body, and the first opening 2 is inclined, it is often difficult for the user to determine the specific orientation of the first opening 2 by observation, which is very inconvenient. In this embodiment, the first handle 5 and the second handle 6 differ in diameter, and the first handle 5 and the second handle 6 correspond to the first side 21 and the second side 22 of the first opening 2, respectively. In actual use, the user can determine the orientation of the first opening 2 by the position of the first handle 5 and the second handle 6, which facilitates the smooth progress of the operation and improves the efficiency and safety of the operation.

[0028] In some embodiments, the end face of the first opening 2 is provided with an annular blade 23, and the cutting surface of the annular blade 23 is located inside the sleeve body 1.

[0029] Specifically, by setting an annular blade 23 at the first opening 2 of the cannula body 1, the surgical efficiency of intervertebral disc treatment and bone graft bed preparation during the operation can be improved. After setting the depth of the cannula body 1 within the intervertebral disc, the position of the cannula body 1 is fixed by a limiting ring. One side of the annular blade 23 is then placed against the nucleus pulposus, intervertebral disc, or cartilaginous endplate. During anterior cervical spine surgery, under endoscopic assistance, the user rotates the cannula body 1 using the first handle 5 and the second handle 6, and uses the annular blade 23 to efficiently cut the nucleus pulposus, intervertebral disc, and cartilaginous endplate, thereby improving surgical efficiency.

[0030] In some embodiments, the sleeve body 1 is provided with a thickening layer 24 for thickening the sleeve wall on the outer side corresponding to the second side 22.

[0031] Specifically, this design can increase the overall strength of the first opening 2, provide a stress limit during operation, prevent the first opening 2 of the cannula body 1 from breaking during the operation of rotating and cutting the intervertebral disc and prying the intervertebral space, and prevent the broken part from falling into the spinal canal, thereby reducing the risk of adverse surgery.

[0032] In some embodiments, the distance between the bottom of the limiting thread 4 and the first opening 2 ranges from 10mm to 30mm. Furthermore, the pitch of the limiting thread 4 is 1mm, and the number of thread turns is 20. A partition is provided between the limiting thread 4 and the first opening 2. The distance between the limiting thread 4 and the first opening 2 can be adjusted according to the depth requirements of the cannula body 1 during different surgeries, thereby meeting different usage needs. In the preferred embodiment, the pitch is 1mm and the number of thread turns is 20.

[0033] In summary, this utility model embodiment provides a working cannula for cervical endoscopic surgery. By setting a limiting thread 4, it can be positioned in conjunction with a limiting ring, achieving stable control of the working depth of the cannula body 1 and preventing damage to the spinal cord nerves due to excessive working depth. The first handle 5 and the second handle 6 facilitate the rotation of the cannula body 1, thereby allowing the operator to easily adjust the working depth. Furthermore, the handles, combined with the annular blade 23 at the first opening 2, enable the user to efficiently rotate and cut the nucleus pulposus, intervertebral disc, and cartilaginous endplate under endoscopic assistance during anterior cervical spine surgery, improving surgical efficiency. The thickened layer 24 effectively enhances the strength of the end of the cannula body 1, preventing breakage and reducing surgical risks.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A working cannula for cervical endoscopic surgery, characterized in that, The sleeve body includes a through hole. The first opening of the sleeve body is inclined. The side of the first opening that is closer to the second opening of the sleeve body is defined as the first side, and the side that is farther away from the second opening is defined as the second side. The casing body has a limiting thread above the first opening, and the limiting thread cooperates with a limiting ring to adjust and control the working depth of the casing body.

2. The working cannula for cervical endoscopic surgery according to claim 1, characterized in that, The sleeve body has a first handle and a second handle symmetrically arranged on the side wall near the second opening. The axis of the first handle and the axis of the second handle are both perpendicular to the central axis of the sleeve body.

3. The working cannula for cervical endoscopic surgery according to claim 2, characterized in that, Both the outer surfaces of the first handle and the second handle are provided with anti-slip textures.

4. The working cannula for cervical endoscopic surgery according to claim 2, characterized in that, The diameter of the first handle is smaller than the diameter of the second handle.

5. The working cannula for cervical endoscopic surgery according to claim 4, characterized in that, The first handle is positioned directly above the first side, and the second handle is positioned directly above the second side.

6. The working cannula for cervical endoscopic surgery according to claim 1, characterized in that, The end face of the first opening is provided with an annular blade, and the cutting edge of the annular blade is located inside the sleeve body.

7. The working cannula for cervical endoscopic surgery according to claim 1, characterized in that, The sleeve body has a thickening layer on the outer side wall corresponding to the second side for thickening the sleeve wall.

8. The working cannula for cervical endoscopic surgery according to claim 1, characterized in that, The distance between the bottom of the limiting thread and the first opening ranges from 10mm to 30mm.

9. The working cannula for cervical endoscopic surgery according to claim 8, characterized in that, The pitch of the limiting thread is 1 mm, and the number of thread turns is 20.

Images