Working cannula for anterior cervical fusion surgery
By designing an inner and outer cannula cannula suitable for cervical anterior fusion surgery, the problems of narrow surgical space and difficulty in fixing are solved, and efficient and flexible minimally invasive surgery is achieved, reducing the difficulty and cost of the surgery.
Patent Information
- Application Number
- CN202323476198.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The existing coaxial endoscopy cannot be used for cervical anterior fusion surgery, resulting in narrow surgical space, small instrument channels, and difficulty in fixing, which affects surgical efficiency and flexibility.
A working sleeve consisting of an inner tube and an outer tube is designed. The inner tube is connected by a lock. The support piece of the inner tube is longer than the outer tube, providing additional support and viewing windows. The outer tube has a U-shaped fork for convenience. Fixing, achieving stable fixation and flexible use of the sleeve.
It improves the flexibility and efficiency of surgery, reduces the surgical burden of doctors, enhances the universality of devices, and reduces the difficulty and cost of surgery.
Smart Images
Figure CN222237724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a novel working sleeve suitable for anterior cervical endoscopic fusion surgery (EndoACDF), belonging to the field of medical instruments. Background Art
[0002] Since 2000, spinal endoscopy technology has been introduced into China and has developed and popularized rapidly. It has evolved from introduction, learning and catching up to now surpassing the foreign technology of the same period. Whether in terms of surgical volume or indications, China's spinal endoscopy technology is already in a leading position. At present, most of all spinal endoscopic surgeries are coaxial endoscopes for lumbar, thoracic and posterior cervical spine. The instruments are passed through the instrument channel of the endoscope and the surgery is carried out under the field of view provided by the endoscope. The minimally invasive effect of the surgery is very good. The annual number of surgeries has reached about 130,000. However, in anterior cervical fusion surgery and posterior cervical multi-segment decompression surgery, the existing coaxial endoscopes are not applicable and cannot meet the actual needs of current clinical practice due to their size, shape and some tools.
[0003] During anterior cervical fusion surgery, in order to directly observe the compression of the posterior vertebral neural dura mater through the anterior approach, the doctor must insert the mirror deep into the intervertebral space and reach the posterior edge of the vertebral body to observe and promptly treat the relevant lesions. Because the cervical intervertebral space is quite narrow, most of them are within 5mm. If the traditional coaxial endoscope is to be made to such a small size, the instrument channel and optical channel will be very small, which has many limitations. In addition, because there are fewer muscles and insufficient depth in the anterior cervical spine, the endoscope or working cannula needs to be fixed. If not fixed, the doctor will need to free up one hand to support the working cannula, which is extremely inconvenient during surgery and the work efficiency is very low.
[0004] The prior art has not disclosed a dedicated working cannula suitable for anterior cervical endoscopic fusion surgery, and cannot effectively meet the clinical needs of such surgery.
[0005] In view of this, this patent application is proposed. Utility Model Content
[0006] The working sleeve for anterior cervical fusion surgery described in the present application is based on solving the problems and needs of the above-mentioned prior art and proposes a structural innovation with a new sleeve fixing method and supporting the intervertebral space, so as to free the doctor's hands and increase the doctor's flexibility in performing surgery, so as to reduce the surgical load, increase the versatility of the instrument and reduce the difficulty of the operation.
[0007] To achieve the above-mentioned design purpose, the working sleeve for anterior cervical fusion surgery includes an inner tube and an outer tube, the inner tube having a tube body and an inner tube handle located at the top end of the tube body for connecting and fixing the outer tube, a mirror body implantation hole is arranged at the center of the inner tube handle, the tube body has a through-length hollow cavity, and the mirror body implantation hole is connected to the hollow cavity of the tube body; the outer tube has an outer tube body and an outer tube handle located at the top end of the outer tube body for connecting and fixing the inner tube, an inner tube implantation hole is arranged at the center of the outer tube handle, the outer tube body has a through-length hollow cavity, and the inner tube implantation hole is connected to the hollow cavity of the outer tube body.
[0008] Furthermore, two groups of protruding support plates are symmetrically connected to the bottom end of the tube body, and the front end of the support plates has barbs extending inward. A hollow working end of the inner tube is formed between the two groups of support plates, and the working end has at least one group of observation windows.
[0009] Furthermore, two groups of protruding outer tube support plates are symmetrically connected to the bottom end of the outer tube body, and the outer tube support plates extend forward to form a tip; a hollow working end of the outer tube is formed between the two groups of outer tube support plates, and the working end has at least one group of outer tube observation windows.
[0010] Furthermore, when the tube body of the inner tube is sleeved into the outer tube body of the outer tube, the observation window of the inner tube overlaps with the observation window of the outer tube.
[0011] Furthermore, the support piece of the inner tube is longer than the support piece of the outer tube.
[0012] Furthermore, the outer tube handle extends outward and upward, and a U-shaped fork is provided at the outer end thereof.
[0013] Furthermore, when the tube body of the inner tube is inserted into the outer tube body of the outer tube, the inner tube handle is buckled downwardly onto the extension portion of the outer tube handle.
[0014] Furthermore, the central axis of the inner tube handle is parallel to the center line connecting the two groups of support plates, and the central axis of the outer tube handle is parallel to the center line connecting the two groups of outer tube support plates.
[0015] Furthermore, a mounting locking device is provided between the inner tube handle and the outer tube handle.
[0016] Furthermore, a groove is provided on one side of the outer tube handle, and a lock switch is provided at the corresponding position of the inner tube handle. The lock switch includes a cam arranged on a transverse axis, and a set of pins provided with springs are connected to the side of the cam; the pin can be inserted into or pulled out of the groove through the change in the outer diameter of the cam and the relative position of the outer tube handle during the rotation of the fixed axis.
[0017] In summary, the working sleeve for anterior cervical fusion surgery has the following advantages:
[0018] 1. This application can be used in combination with endoscopes and other instruments and is suitable for performing minimally invasive anterior cervical fusion surgery under the microscope, filling the technical gap in existing domestic related surgeries.
[0019] 2. The outer tube of the present application is equipped with a support plate to effectively reduce the use of other instruments during surgery and reduce the occupation of surgical space. It can solve the clinical problem of narrow surgical space and achieve efficient, safe and rapid grinding of the posterior edge of the vertebral body, thereby improving the versatility of the instrument and increasing its indications.
[0020] 3. The application of this application can significantly reduce the investment in spinal endoscopic surgery and reduce the surgical costs for patients.
[0021] 4. The inner and outer tubes of the present application have a mutually locking connection method, which is conducive to connection and use with other fixators, thereby freeing the doctor's hands, reducing the doctor's surgical burden, and increasing surgical flexibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of the inner tube;
[0023] Figure 1-1 is a schematic diagram of the inner tube handle;
[0024] Figure 2 is a schematic diagram of the structure of the outer tube;
[0025] Figure 2-1 is a schematic diagram of the outer tube handle;
[0026] Figure 3 This is a schematic diagram of a working sleeve for anterior cervical fusion surgery described in this application;
[0027] Figure 3-1 For Figure 3 An exploded schematic diagram of the structure shown;
[0028] Figure 4 It is a schematic diagram of the lock structure at the inner and outer tube handles;
[0029] Figure 4-1 For Figure 4 A partial cross-section of the structure;
[0030] Figure 5 This is a schematic diagram of anterior cervical endoscopic fusion surgery;
[0031] Figure 6 This is a schematic diagram of the vertebral fusion effect after the above operation. DETAILED DESCRIPTION
[0032] In order to further explain the technical means adopted by the present application to achieve the predetermined design objectives, the following preferred implementation scheme is proposed in conjunction with the accompanying drawings.
[0033] The following description sets forth specific details to facilitate a full understanding of the present application. However, the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.
[0034] Embodiment 1, as Figures 1 to 6 As shown, the working sleeve proposed in this application is suitable for performing anterior cervical spine fusion surgery in the EndoACDF method. The working sleeve includes an inner tube 1 and an outer tube 2 whose axial centers coincide with each other and are integrated into a structure.
[0035] The inner tube 1 comprises a tube body 11 and an inner tube handle 12 located at the top of the tube body 11 and used for connecting and fixing the outer tube 2. A mirror body implantation hole 13 is arranged at the center of the inner tube handle 12. The tube body 11 has a through-length hollow cavity, and the mirror body implantation hole 13 is connected to the hollow cavity of the tube body 11.
[0036] Two groups of protruding support sheets 14 are symmetrically connected to the bottom end of the tube body 11. The front end of the support sheet 14 has a barb 15 extending inward. The barb 15 is used to prevent the support sheet 14 from being squeezed out due to a large pressure in the intervertebral space 5, thereby affecting the normal operation.
[0037] A hollow working end of the inner tube 1 is formed between the two groups of support sheets 14 , and the working end has at least one group of observation windows 16 . Furthermore, the support sheets 14 and the tube body 11 can be processed into an integrated structure through an integral injection molding process.
[0038] The outer tube 2 comprises an outer tube body 21 and an outer tube handle 22 located at the top of the outer tube body 21 and used to connect and fix the inner tube 1. The outer tube handle 22 is used to connect with a device such as a fixator used in surgery to fix the entire working sleeve and the endoscope 4 inserted into the inner tube 1.
[0039] An inner tube implantation hole 23 is provided at the center of the outer tube handle 22. The outer tube body 21 has a through-length hollow cavity. The inner tube implantation hole 23 is connected to the hollow cavity of the outer tube body 21.
[0040] Two groups of protruding outer tube support pieces 24 are symmetrically connected to the bottom end of the outer tube body 21, and the outer tube support pieces 24 extend forward to form a tip 25;
[0041] A hollow working end of the outer tube 2 is formed between the two groups of outer tube support sheets 24 , and the working end has at least one group of outer tube observation windows 26 .
[0042] Furthermore, when the tube body 11 of the inner tube 1 is inserted into the outer tube body 21 of the outer tube 2, the observation window 16 of the inner tube 1 overlaps with the observation window 26 of the outer tube to avoid the tube bodies of the two blocking each other and reducing the observation field of view.
[0043] A more preferred solution is that the support piece 14 of the inner tube 1 is longer than the support piece 24 of the outer tube, so that it can be inserted into a deeper position to support the entire intervertebral space, leaving surgical space for the endoscope and other surgical instruments.
[0044] Furthermore, the outer tube handle 22 extends outward and upward, and a U-shaped fork 27 is provided at its outer end. The fork 27 can be used for plugging or other fixed connection with an external fixture or other device.
[0045] In order to improve the mutual fixing effect between the inner tube 1 and the outer tube 2, a further preferred solution is that when the tube body 11 of the inner tube 1 is inserted into the outer tube body 21 of the outer tube 2, the inner tube handle 12 is buckled downwardly into the extension of the outer tube handle 22.
[0046] Furthermore, the central axis of the inner tube handle 12 is parallel to the center line connecting the two groups of support plates 14. Similarly, the central axis of the outer tube handle 22 is parallel to the center line connecting the two groups of outer tube support plates 24. Therefore, the doctor can accurately judge the position and direction of the support plate located at the front end of the tube body and inserted into the intervertebral space from the position and direction of the inner tube handle 12 and the outer tube handle 22 on the outside, thereby providing a necessary and accurate judgment basis for performing surgery.
[0047] Furthermore, a locking device is installed between the inner tube handle 12 and the outer tube handle 22. The preferred solution provided in this embodiment is that a groove 28 is provided on one side of the outer tube handle 22, and a locking switch 18 is provided at a corresponding position of the inner tube handle 12. The locking switch 18 includes a cam 18-1 arranged on a transverse axis, and the side of the cam 18-1 is connected to a set of pins 18-3 provided with springs 18-2; through the change of the outer diameter of the cam 18-1 and the relative position of the outer tube handle 22 during the fixed axis rotation, the pin 18-3 can be inserted into the groove 28 or pulled out from the groove 28, thereby realizing the locking and unlocking between the inner tube handle 12 and the outer tube handle 22.
[0048] like Figure 5 As shown, when the working sleeve with the above-mentioned structural design is used for anterior cervical fusion surgery, first, a distractor is placed and implanted into the vertebral body to distract the intervertebral space 5;
[0049] Then the working sleeve is inserted, and the inner tube 1 and the outer tube 2 are locked and positioned between their respective handles through the locking device to form an integral structure; when inserted, the long axis directions of the inner tube 1 and the outer tube 2 are kept parallel to the intervertebral disc to increase the surgical treatment range;
[0050] Then, an endoscope 4 used for anterior cervical fusion surgery is placed into the inner tube 1 of the working cannula, and the lesion in the intervertebral space 5 is observed through the overlapping observation window 16 of the inner tube 1 and the observation window 26 of the outer tube;
[0051] Then, without occupying too much operating space, the doctor can put the surgical forceps 3 into the inner tube 1 and process various soft tissues and bone tissues under the direct vision of the endoscope 4.
[0052] like Figure 6 As shown, after the above operation is performed, a fusion device 7 is implanted in the vertebral body and a fixing plate 8 is driven in to fix the vertebral body, so that this segment is in a stable state, which is conducive to the fusion of the fusion device.
Claims
1. A working cannula for anterior cervical fusion surgery, comprising an inner tube and an outer tube, characterized in that: The inner tube has a tube body and an inner tube handle located at the top of the tube body for connecting and fixing the outer tube, a mirror body implantation hole is arranged at the center of the inner tube handle, the tube body has a through-length hollow cavity, and the mirror body implantation hole is connected to the hollow cavity of the tube body; The outer tube comprises an outer tube body and an outer tube handle at the top end of the outer tube body for connecting and fixing the inner tube. An inner tube implantation hole is arranged at the center of the outer tube handle. The outer tube body comprises a through-length hollow cavity. The inner tube implantation hole is connected to the hollow cavity of the outer tube body.
2. The working sleeve for anterior cervical fusion surgery according to claim 1, characterized in that: Two groups of protruding support sheets are symmetrically connected to the bottom of the tube body. The front ends of the support sheets have barbs extending inward. A hollow working end of the inner tube is formed between the two groups of support sheets. The working end has at least one group of observation windows.
3. The working sleeve for anterior cervical fusion surgery according to claim 1, characterized in that: Two groups of protruding outer tube support plates are symmetrically connected to the bottom end of the outer tube body, and the outer tube support plates extend forward to form a tip; a hollow working end of the outer tube is formed between the two groups of outer tube support plates, and the working end has at least one group of outer tube observation windows.
4. The working sleeve for anterior cervical fusion surgery according to claim 3, characterized in that: When the tube body of the inner tube is sleeved in the outer tube body of the outer tube, the observation window of the inner tube overlaps with the observation window of the outer tube.
5. The working sleeve for anterior cervical fusion surgery according to claim 4, characterized in that: The support plates of the inner tube are longer than those of the outer tube.
6. The working sleeve for anterior cervical fusion surgery according to claim 1, characterized in that: The outer tube handle extends upward and outward, and a U-shaped fork is arranged at the outer end thereof.
7. The working sleeve for anterior cervical fusion surgery according to claim 6, characterized in that: When the tube body of the inner tube is sleeved in the outer tube body of the outer tube, the inner tube handle is buckled downwardly on the extension part of the outer tube handle.
8. The working sleeve for anterior cervical fusion surgery according to claim 5, characterized in that: The central axis of the inner tube handle is parallel to the center line connecting the two groups of support plates, and the central axis of the outer tube handle is parallel to the center line connecting the two groups of outer tube support plates.
9. The working sleeve for anterior cervical fusion surgery according to claim 1, characterized in that: A mounting lock device is arranged between the inner tube handle and the outer tube handle.
10. The working sleeve for anterior cervical fusion surgery according to claim 9, characterized in that: A groove is provided on one side of the outer tube handle, and a lock switch is provided at a corresponding position of the inner tube handle. The lock switch includes a cam arranged on a transverse axis, and a set of pins provided with a spring are connected to the side of the cam; The pin can be inserted into or extracted from the groove by changing the position of the outer diameter of the cam and the outer tube handle relative to each other during the rotation of the fixed axis.