Oral pharyngeal atlantoaxial minimally invasive lifting reduction steel plate

Abstract

The utility model provides a kind of oral pharynx atlantoaxial vertebra minimally invasive lifting reduction steel plate, and it is related to implantable surgical supplies technical field. Including: steel plate body, steel plate body includes upper crossbeam and the vertical beam fixedly connected with it, the both ends of upper crossbeam are provided with first screw hole, the first screw hole is installed with atlas side block set screw, the end of vertical beam is provided with second screw hole, the second screw hole is installed with pivot vertebra vertebral body set screw, the junction of vertical beam with upper crossbeam is provided with lifting reduction screw hole, lifting reduction screw hole is installed with lifting reduction screw.The reduction steel plate can be used to pull the atlantoaxial dislocation patient who cannot be reduced oral pharynx lysis, then implement the reduction internal fixation operation of front road.

Description

Technical Field

[0001] This utility model relates to the field of implantable surgical consumables technology, and in particular to a transoral atlantoaxial minimally invasive lifting and repositioning plate. Background Technology

[0002] The atlantoaxial joint is located at the craniocervical junction. Atlantoaxial dislocation can cause high cervical spinal cord compression, leading to paralysis or even death. Clinically, patients with atlantoaxial dislocation are first treated with traction reduction, followed by external fixation or surgery. For patients who cannot be reduced by traction, oropharyngeal decompression is required, followed by anterior or posterior reduction and internal fixation surgery.

[0003] The atlantoaxial transoropharyngeal plate that has been invented and applied in clinical practice has two drawbacks: 1. The plate is large, and the surgery requires extensive dissection of the soft tissues such as muscles and mucous membranes of the posterior pharyngeal wall to obtain sufficient exposure space to fix the plate; 2. Existing transoropharyngeal plates lack self-lifting and repositioning functions and require the use of external repositioning devices for repositioning.

[0004] In view of the above reasons, this utility model proposes a transoral atlantoaxial minimally invasive lifting and reduction plate, which can be used for minimally invasive fixation with only a small amount of soft tissue dissection; and has a self-lifting reduction function, so that the atlantoaxial dislocation can be reduced without the aid of external reduction instruments. Utility Model Content

[0005] The purpose of this invention is to provide a minimally invasive transoral atlantoaxial traction reduction plate that can be used for transoral release reduction and internal fixation surgery for patients with atlantoaxial dislocation that cannot be reduced by traction.

[0006] This utility model provides a minimally invasive transoral atlantoaxial traction and reduction plate, comprising: a plate body, the plate body including an upper crossbeam and a vertical beam fixedly connected thereto, the upper crossbeam having first screw holes at both ends, the first screw holes being fitted with atlantoaxial lateral mass fixation screws, the vertical beam having a second screw hole at its end, the second screw hole being fitted with an axis vertebral body fixation screw, and a traction and reduction screw hole being provided at the junction of the vertical beam and the upper crossbeam, the traction and reduction screw hole being fitted with a traction and reduction screw.

[0007] Preferably, the steel plate body is T-shaped, and one end of the vertical beam is vertically and integrally connected to the middle of the upper horizontal beam.

[0008] Preferably, the two ends of the upper crossbeam, the end of the vertical beam, and the connection with the upper crossbeam all have a smooth arc transition.

[0009] Preferably, when the upper crossbeam is fixed on the anterior arch of the atlantoaxial joint, the two atlantoaxial lateral mass fixing screws are respectively fixedly connected to the atlantoaxial lateral masses on both sides.

[0010] Preferably, a first locking structure is provided on one side of the first screw hole, the first locking structure being used to lock the atlantoaxial lateral block fixing screw after installation.

[0011] Preferably, the first locking structure is a near-circular steel sheet with one side cut into a straight line. The near-circular steel sheet is rotatably connected to the upper crossbeam. By rotating the near-circular steel sheet, the fixing screws of the atlas side block after installation can be locked.

[0012] Preferably, the pull-back screw points to the base of the odontoid process of the axis, and is used to pull the odontoid process of the axis forward and back.

[0013] Preferably, a second locking structure is provided between the second screw hole and the pull-back screw hole, the second locking structure being used to lock the axis vertebral body fixation screw and the pull-back screw after installation.

[0014] Preferably, the second locking structure is a rectangular steel sheet or a rectangular-like steel sheet, which is rotatably connected to the vertical beam. By rotating the rectangular steel sheet or the rectangular-like steel sheet, the axis vertebral body fixing screw and the pull-back reset screw can be locked together after installation.

[0015] Preferably, the steel plate body, the atlas lateral mass fixation screw, the axis vertebral body fixation screw, and the pull-reduction screw are all made of at least one of medical implantable steel, medical titanium alloy, and biodegradable zinc alloy.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the unique T-shaped structure design that mimics the anatomical shape, all screw fixation points are concentrated in the area near the midline of the atlantoaxial joint, which can minimize the dissection of muscles and soft tissues during surgical exposure, reduce surgical trauma, and reduce surgical incision suture tension, avoiding complications such as incision dehiscence.

[0018] 2. Using the upper horizontal beam and vertical beam as the main structure, and the atlas lateral mass fixation screw, axis vertebral body fixation screw and pull-reduction screw as fasteners, the atlas and axis can be fixed, and the odontoid process of the axis can be pulled and reduced, so as to realize the reduction and external fixation after atlantoaxial dislocation, and achieve the therapeutic effect for patients. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the minimally invasive traction and repositioning process of the atlantoaxial joint using this utility model;

[0022] Explanation of reference numerals in the attached figures:

[0023] 1: Steel plate body; 101: Upper crossbeam; 102: Vertical beam; 2: First screw hole; 3: Atlas lateral mass fixing screw; 4: Second screw hole; 5: Axis vertebral body fixing screw; 6: Lifting and repositioning screw hole; 7: Lifting and repositioning screw; 8: Atlas lateral mass; 9: Axis; 10: First locking structure; 11: Second locking structure. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1-2 As shown, this utility model provides a minimally invasive oropharyngeal atlantoaxial traction reduction plate, comprising: a plate body 1, the plate body 1 including an upper crossbeam 101 and a vertical beam 102 fixedly connected to its middle portion; the upper crossbeam 101 has first screw holes 2 at both ends, and atlas lateral mass fixation screws 3 are installed in the first screw holes 2 for fixed connection with atlas lateral mass 8; the vertical beam 102 has a second screw hole 4 at its end, and axis vertebral body fixation screws 5 are installed in the second screw hole 4 for fixed connection with axis 9 vertebral body; a traction reduction screw hole 6 is provided at the junction of the vertical beam 102 and the upper crossbeam 101, and a traction reduction screw 7 is installed in the traction reduction screw hole 6 for connection with the base of the odontoid process of axis 9, pulling axis 9 forward and reducing its position before and after traction reduction, as shown in the figure. Figure 2 As shown.

[0028] Specifically, the steel plate body 1 is T-shaped, with one end of the vertical beam 102 being vertically and integrally connected to the middle of the upper crossbeam 101, and the two are connected by an arc transition, so that the upper crossbeam 101 and the vertical beam 102 are not in the same plane, thus facilitating the connection between the atlas lateral mass 8 and the axis 9. In addition, both ends of the upper crossbeam 101 and the ends of the vertical beam 102 are also smoothly transitioned in an arc shape.

[0029] In this embodiment, the upper crossbeam 101 is used to fix the anterior arch of the atlantoaxial joint. When the upper crossbeam 101 is fixed on the anterior arch of the atlantoaxial joint, the two atlantoaxial lateral mass fixing screws 3 are respectively fixedly connected to the atlantoaxial lateral mass 8 on both sides.

[0030] In this embodiment, a first locking structure 10 is provided on one side of the first screw hole 2. The first locking structure 10 is used to lock the installed atlas side block fixing screw 3. The first locking structure 10 is a semi-circular steel plate with one side cut into a straight line. The semi-circular steel plate is rotatably connected to the upper crossbeam 101. By rotating the semi-circular steel plate, the installed atlas side block fixing screw 3 can be locked to prevent it from coming off during use.

[0031] In this embodiment, the vertical beam 102 is used to fix the axis 9, wherein the lifting and repositioning screw 7 points to the base of the tooth process of the axis 9 and is used to pull the tooth process of the axis 9 forward and reposition it. The axis vertebral body fixing screw 5 is used to cooperate with the vertebral body of the axis 9 for fixation, further increasing the fixation strength.

[0032] In this embodiment, a second locking structure 11 is provided between the second screw hole 4 and the pull-back screw hole 6. The second locking structure 11 is used to lock the installed axis vertebral body fixation screw 5 and pull-back screw 7. The second locking structure 11 is a rectangular steel plate or a rectangular-like steel plate, which is rotatably connected to the vertical beam 102. By rotating the rectangular steel plate or the rectangular-like steel plate, the installed axis vertebral body fixation screw 5 and pull-back screw 7 can be locked together. When locked, the long side of the rectangular steel plate or the rectangular-like steel plate coincides with the length direction of the vertical beam 102.

[0033] In this embodiment, the steel plate body 1, the atlas lateral mass fixation screw 3, the axis vertebral body fixation screw 5, and the pull-reduction screw 7 are all made of at least one of the following materials: medical implantable steel, medical titanium alloy, and biodegradable zinc alloy.

[0034] The usage process of this utility model is as follows:

[0035] After successful anesthesia and intubation, the patient lies supine, and the oral cavity is repeatedly cleaned. An oral retractor is used to fully expose the posterior pharyngeal wall. A longitudinal incision is made along the midline of the posterior pharyngeal wall, and the mucosa and mucomuscular layer are cut. Then, an electrocautery knife is used to slightly dissect the muscle tissue attached to the anterior aspect of the atlantoaxial joint along the midline. The surgery only needs to expose the central area from the anterior arch of the atlas to the midpoint of the lateral mass and the anterior aspect of the axis 9, without excessive dissection of muscle tissue. After exposure, a steel plate of appropriate size is selected. First, a hole is drilled in the lateral mass 8 of the atlas, and the first screw hole 2 is drilled at both ends of the steel plate. The plate is fixed to the lateral mass 8 of the atlas through the atlas lateral mass fixation screw 3. The plate is then fixed to the atlas through the upper crossbeam 101 of the plate body 1, making it a whole. Then, a pull-reduction screw hole 6 is drilled at the base of the odontoid process of the axis 9, and a pull-reduction screw 7 of appropriate length is selected to pull the axis forward and reduce it. After satisfactory reduction is observed under fluoroscopy, a second screw hole 4 is drilled at the end of the vertical beam 102, and the axis vertebral body fixation screw 5 is screwed in to strengthen the fixation, completing the surgery.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A minimally invasive transoral atlantoaxial traction and reduction plate, characterized in that, include: The steel plate body includes an upper crossbeam and a vertical beam fixedly connected thereto. The upper crossbeam has a first screw hole at each end, and an atlas lateral mass fixing screw is installed in the first screw hole. The vertical beam has a second screw hole at its end, and an axis vertebral body fixing screw is installed in the second screw hole. A pull-back screw hole is provided at the junction of the vertical beam and the upper crossbeam, and a pull-back screw is installed in the pull-back screw hole.

2. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, The steel plate body is T-shaped, and one end of the vertical beam is vertically and integrally connected to the middle of the upper horizontal beam.

3. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 2, characterized in that, Both ends of the upper crossbeam, the end of the vertical beam, and the connection point with the upper crossbeam all have a smooth, rounded transition.

4. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, When the upper crossbeam is fixed on the anterior arch of the atlantoaxial joint, the two atlantoaxial lateral mass fixing screws are respectively fixedly connected to the atlantoaxial lateral masses on both sides.

5. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, A first locking structure is provided on one side of the first screw hole, which is used to lock the atlantoaxial side block fixing screw after installation.

6. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 5, characterized in that, The first locking structure is a near-circular steel plate with one side cut into a straight line. The near-circular steel plate is rotatably connected to the upper crossbeam. By rotating the near-circular steel plate, the fixing screws of the atlas side block after installation can be locked.

7. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, The pull-back screw points to the base of the odontoid process of the axis vertebra, and is used to pull the odontoid process of the axis vertebra forward and back.

8. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, A second locking structure is provided between the second screw hole and the pull-reset screw hole. The second locking structure is used to lock the axis vertebral body fixation screw and the pull-reset screw after installation.

9. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 8, characterized in that, The second locking structure is a rectangular steel sheet or a rectangular-like steel sheet, which is rotatably connected to the vertical beam. By rotating the rectangular steel sheet or the rectangular-like steel sheet, the axis vertebral body fixing screw and the pull-back reset screw can be locked together after installation.

10. The oropharyngeal atlantoaxial minimally invasive traction and reduction plate according to claim 1, characterized in that, The steel plate body, the atlas lateral mass fixation screw, the axis vertebral body fixation screw, and the pull-reduction screw are all made of at least one of the following materials: medical implantable steel, medical titanium alloy, and biodegradable zinc alloy.

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