Height-adjustable interbody fusion cage for oblique lateral approach
By designing an oblique lateral approach intervertebral fusion device with height adjustment function, the problem of multiple adaptation and bone grafting in the prior art is solved, and more flexible surgical operations and better fusion effects are achieved.
Patent Information
- Application Number
- CN202421637862.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the existing oblique lateral lumbar intervertebral fusion surgery, the fixed height fusion device needs to be adapted multiple times, which will increase the patient's bleeding and pain, and the bone cannot be grafted after implantation, and the bone is not fully fitted with the endplate, resulting in poor bone resorption and fusion effect.
A height-adjustable intervertebral fusion device with an oblique lateral approach is designed, adopting a frame structure and a multi-component combination open design, with a height adjustment function, which can be precisely adjusted after implantation, and improves the fit and stability of implantation through a large bone graft window and curved design.
The fusion device provides greater surgical operation flexibility, ensures optimal implantation position and fusion effect, reduces surgical time and patient bleeding, and improves surgical success rate and patient treatment effect.
Smart Images
Figure CN223041675U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fusion devices, and particularly relates to a height-adjustable intervertebral fusion device for an oblique lateral approach. Background Art
[0002] At present, in the oblique lateral lumbar interbody fusion (OLIF) surgery, a fusion device with a fixed height is used. It is necessary to use many surgical tools such as trial molds and gradually adapt to a fusion device with a suitable height and size, and then implant it into the intervertebral space. Using a traditional fusion device for surgery has the following problems and disadvantages:
[0003] 1) It is necessary to repeatedly adapt to the size of the patient's intervertebral space to select a fusion device with a suitable height and size. The operation time is long, resulting in an increase in the patient's blood loss and increasing the pain.
[0004] 2) Pre-implantation of bone grafting. After implantation, bone grafting cannot be carried out again. The implanted bone mass is difficult to fully fit with the endplate, and there is a risk of insufficient bone absorption and non-fusion.
[0005] 3) Conventional fusion devices are usually made of PEEK material. After implantation, they cannot be well visualized, and it is impossible to effectively observe the implantation position of the fusion device.
[0006] 4) It is difficult to insert a large-sized fusion device under the endoscope channel, and it is impossible to perform minimally invasive surgery for all height and size fusion devices. Content of the Utility Model
[0007] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a height-adjustable intervertebral fusion device for an oblique lateral approach, which has a height adjustment function, can be precisely adjusted after implantation, provides greater surgical operation flexibility, and ensures the best implantation position and fusion effect. To achieve the above object and other advantages of the present utility model, there is provided a height-adjustable intervertebral fusion device for an oblique lateral approach, including:
[0008] A main body in a frame structure, on one end face of the main body, a first upper blade is movably arranged, and on the end face of the main body opposite to the first upper blade, a second lower blade is movably arranged;
[0009] Positioning holes are respectively opened on a pair of opposite side surfaces of the main body. The two positioning holes are located on the same straight line in the horizontal direction, and the center lines of the two positioning holes are also on the same straight line;
[0010] The end face of the main body adjacent to the positioning hole is a threaded end face, and threaded holes are opened on the threaded end face;
[0011] The surfaces of the first upper blade and the second lower blade are both inclined with respect to the horizontal line, and the surfaces of the first upper blade and the second lower blade are both arranged at an acute angle with respect to the horizontal line;
[0012] The surfaces of the first upper blade and the second lower blade are both arranged in an arc shape.
[0013] Preferably, when the surfaces of the first upper blade and the second lower blade are extended respectively, they intersect with each other, and the angle of intersection is in a range of 6 degrees to 12 degrees.
[0014] Preferably, large bone grafting windows are provided on the surfaces of the first upper blade and the second lower blade.
[0015] Preferably, evenly distributed tooth structures are provided on the surface of the first upper blade.
[0016] Preferably, the surface of the second lower blade is provided with uniformly distributed transverse straight lines with inverted tooth structures, and the second lower blade is provided with a plurality of inverted tooth structures between the transverse straight lines with inverted tooth structures.
[0017] Compared with the prior art, the utility model has the following beneficial effects: the fusion device of the present application is suitable for OLIF (Oblique Lateral Interbody Fusion) surgery, which brings significant benefits to doctors and patients. The fusion device has a height adjustment function and can be precisely adjusted after implantation, providing greater flexibility in surgical operations and ensuring the best implantation position and fusion effect. Its 33-arc surface design conforms to the shape of the human intervertebral space, which is conducive to fitting after implantation, thereby improving the success rate of the operation. The bolt design ensures its strength and stability. The design of the large bone grafting window allows for the implantation of more bone, which can better promote the bone grafting fusion effect. The support combined design can achieve bone grafting after implantation, promotes bone fusion, and helps accelerate the patient's postoperative recovery.
[0018] The side positioning hole design makes it convenient for doctors to take X-rays during surgery, improving the accuracy and safety of surgical operations. The full thread design ensures that abnormal situations during surgery can be dealt with when withdrawal is required, ensuring the safety of patients. In addition, the curved surface design and anti-retraction tooth design of the fusion device further enhance the stability after implantation, improve the success rate of surgery and the treatment effect of patients. These characteristics and advantages make the utility model have broad clinical application prospects, provide patients with safer and more effective treatment options, and also provide doctors with more convenient and reliable products, promoting the development and progress of the field of spinal surgery. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the height-adjustable intervertebral fusion cage through the oblique lateral approach according to the utility model;
[0020] Figure 2 It is a front view of the height-adjustable intervertebral fusion cage with an oblique lateral approach according to the utility model, with the thread end surface as the perspective;
[0021] Figure 3 It is a view of the height-adjustable intervertebral fusion device with an oblique lateral approach according to the present utility model from the perspective of the inverted pointed tooth surface. Detailed implementation manners
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0023] Refer to Figures 1 - 3 , a height-adjustable intervertebral fusion device with an oblique lateral approach, comprising: a main body 3 in a frame structure, a first upper blade 31 is movably arranged on one end surface of the main body 3, and a second lower blade 32 is movably arranged on the end surface of the main body 3 opposite to the first upper blade 31; by moving the first upper blade 31 and the second lower blade 32 vertically in the main body 3, the fusion device can be continuously and infinitely precisely adjusted after implantation to achieve the best implantation position and fusion effect. Moreover, the first upper blade 31 and the second lower blade 32 adopt a multi-component combined expansion design, which can form a micro-movement effect and is beneficial to the progress of bone fusion. The technical solution here has been disclosed, and the specific structure will not be described in detail here. A bolt 1 is fixedly connected inside the main body 3. The bolt 1 adopts a strengthened internal plum blossom drive design, which can ensure the strength of the bolt 1 during expansion and increase the stability of the operation.
[0024] Positioning holes 5 are respectively opened on a pair of opposite side surfaces of the main body 3. The two positioning holes 5 are located on the same straight line in the horizontal direction, and the center lines of the two positioning holes 5 are also on the same straight line; through the arrangement of the two positioning holes 5, it is convenient to take X-ray films during the operation for observing the accuracy of the implantation position.
[0025] The end surface of the main body 3 adjacent to the positioning hole 5 is a threaded end surface 33. A threaded hole 34 is opened on the threaded end surface 33. The threaded hole 34 adopts a full-thread design for the whole circle, which can ensure that it can cooperate with a threaded tool when it needs to be withdrawn to cope with abnormal situations during the operation.
[0026] The surfaces of the first upper blade 31 and the second lower blade 32 are both inclined with respect to the horizontal line, and the surfaces of the first upper blade 31 and the second lower blade 32 are both arranged at an acute angle with respect to the horizontal line. Through the inclined and arc-shaped arrangements of the surfaces of the first upper blade 31 and the second lower blade 32, the specific arc surface size of the fusion device conforms to the shape of the human intervertebral space, and the side slope is 6-12°, which is beneficial to the fitting after implantation and improves the success rate of the operation.
[0027] Furthermore, when the surfaces of the first upper blade 31 and the second lower blade 32 are extended respectively, they intersect with each other, and the angle of intersection is in a range of 6 degrees to 12 degrees.
[0028] Furthermore, large bone grafting windows are provided on the surfaces of the first upper blade 31 and the second lower blade 32. More bone can be implanted through the large bone grafting windows on the first upper blade 31 and the second lower blade 32 to promote bone graft fusion effect.
[0029] Furthermore, uniformly distributed tooth structures are provided on the surface of the first upper blade 31. The first upper blade 31 does not have an inverted tooth structure and is suitable for patients with normal bone quality.
[0030] Furthermore, the surface of the second lower blade 32 is provided with uniformly distributed transverse straight lines with inverted sharp tooth structures, and the second lower blade 32 is provided with a plurality of inverted sharp tooth structures 6 between the transverse straight lines with inverted sharp tooth structures, which further enhances the anti-retraction function after implantation. The structures on the surfaces of the first upper blade 31 and the second lower blade 32 are suitable for different patients, improving the success rate of the operation and the treatment effect of the patient, and can be selected according to the specific situation.
[0031] When using the fusion device, specifically through the following steps: Before the operation, clarify the position of the psoas major muscle and the adjacent relationship between the blood vessels in front and the nerves behind according to imaging data such as MRI and CT, clarify the positions of important organs such as the kidneys, and measure the distance between the left psoas major muscle and the blood vessels; Anesthesia: Select general anesthesia; Position: The patient takes the right lateral position, with the left side upward, the lower limbs slightly bent, and the psoas muscle relaxed. Locate and expose the intervertebral space: Fluoroscopically locate the position of the intervertebral disc segment, make a mark 6 cm in front of the middle of the intervertebral disc, and generally make a 3-6 cm surgical incision 4-10 cm in front of the middle of the target intervertebral disc. After incising the skin, separate layer by layer, and then bluntly separate the external oblique muscle, internal oblique muscle, and transverse abdominal muscle, etc. to enter the retroperitoneal space. Place a channel in the anatomical space between the aorta and the psoas major muscle, expose the intervertebral space, and perform discectomy and intervertebral space treatment; Then insert the intervertebral fusion device and ensure that the placement position of the fusion device is appropriate. Then use the matching surgical tool to insert into the plum blossom hole of the front edge bolt of the intervertebral fusion device and rotate clockwise until it is expanded to the required height; Then perform bone grafting: According to the patient's condition, after implanting and expanding, implant bone grafts (including autologous bone, allogeneic bone, etc.) and tamp them firmly to promote the fusion effect; Fixation: According to the need, fix the lumbar spine through percutaneous pedicle screw fixation and other methods to ensure the stability of the fusion device and the lumbar spine; Suture: Clean the wound, suture and close the incision, place a drainage tube, and apply pressure dressing. During the operation, an appropriately sized fusion device should be selected, implanted into the intervertebral space, and then through auxiliary tools such as X-rays, after determining that the implantation position is appropriate, the doctor uses special tools to adjust the height. Rotate the plum blossom bolt in the intervertebral fusion device clockwise with a spreading wrench to adjust the height of the fusion device to a satisfactory position and fully fit with the vertebral endplate, which can be confirmed by X-rays to achieve immediate stability. Then implant a large amount of bone grafts through the posterior edge port of the fusion device to ensure that it is tamped firmly and remains stable at the implantation position to achieve the best fusion effect after surgery. Once the fusion device is fixed, the doctor further performs surgical treatment according to the need, such as implanting a nail-rod system for fixation, implanting bone substitutes again, etc. After the operation, the doctor closes the incision and performs appropriate postoperative rehabilitation management and patient care.
[0032] By adopting the above operation process, the doctor can accurately implant and adjust the adjustable-height fusion device to achieve the best implantation position and fusion effect.
[0033] During the whole operation process, medical staff should closely pay attention to the patient's vital signs and the situation of the surgical area to ensure the safety and smoothness of the operation process. After the operation, appropriate postoperative care and observation are required to ensure the good recovery of the patient.
[0034] The number of devices and the processing scale described here are used to simplify the description of the present utility model. The application, modification, and variation of the present utility model are obvious to those skilled in the art.
[0035] Although the embodiments of the present utility model have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples described herein.
Claims
1. A height-adjustable intervertebral fusion cage for an oblique lateral approach, characterized in that: include: A main body (3) in a frame structure, wherein a first upper blade (31) is movably provided on one end surface of the main body (3), and a second lower blade (32) is movably provided on the end surface of the main body (3) opposite to the first upper blade (31); Positioning holes (5) are respectively provided on opposite side surfaces of the main body (3), the two positioning holes (5) are located on the same straight line in the horizontal direction, and the center lines of the two positioning holes (5) are also on the same straight line; The end surface of the main body (3) adjacent to the positioning hole (5) is a threaded end surface (33), and a threaded hole (34) is formed on the threaded end surface (33); The surfaces of the first upper blade (31) and the second lower blade (32) are both arranged at an inclination with respect to the horizontal line, and the surfaces of the first upper blade (31) and the second lower blade (32) are both arranged at an acute angle with respect to the horizontal line; The surfaces of the first upper blade (31) and the second lower blade (32) are both arranged in an arc shape.
2. The height-adjustable intervertebral fusion cage for oblique lateral approach according to claim 1, characterized in that: When the surfaces of the first upper blade (31) and the second lower blade (32) are extended respectively, they intersect with each other, and the angle range of the intersection is 6 degrees to 12 degrees.
3. The height-adjustable intervertebral fusion cage for oblique lateral approach according to claim 2, characterized in that: Large bone grafting windows are provided on the surfaces of the first upper blade (31) and the second lower blade (32).
4. The height-adjustable intervertebral fusion cage for oblique lateral approach according to claim 3, characterized in that: The surface of the first upper blade (31) is provided with uniformly distributed tooth structures.
5. The height-adjustable intervertebral fusion cage for oblique lateral approach according to claim 4, characterized in that: The surface of the second lower blade (32) is provided with uniformly distributed transverse straight lines with inverted pointed tooth structures, and the second lower blade (32) is provided with a plurality of inverted pointed tooth structures (6) between the transverse straight lines with inverted pointed tooth structures.