Vertebral pedicle screw implantation guide plate

Abstract

The utility model provides a pedicle screw imbedding guide plate which comprises a holding part and at least two supporting arms which are connected to one end of the holding part and used for abutting against a pedicle of a vertebral arch, and an avoiding position used for avoiding spinous processes is arranged between every two adjacent supporting arms. The side, adjacent to the avoiding position, of at least one supporting arm is provided with a positioning assembly used for placement of a pedicle screw, and the positioning assembly comprises a positioning structure and a positioning channel penetrating through the positioning structure and used for placement of the pedicle screw. According to the pedicle screw positioning device, a positioning channel is formed in the pedicle screw, it is ensured that the pedicle screw can enter the pedicle at the optimal angle through the positioning channel, an operator can directly conduct screw implantation along the positioning channel through fixing of the supporting arm, pedicle screw implantation precision and operation efficiency are improved, meanwhile, dependence on image navigation in the operation process is reduced, and the operation efficiency is improved. Therefore, the safety and the effect of scoliosis orthopedic surgery are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical technology field especially relates to a pedicle screw implantation guide plate. BACKGROUND

[0002] In the scoliosis correction surgery, the implantation accuracy of the pedicle screw directly affects the surgical effect.

[0003] In the prior art, the traditional pedicle screw implantation method mainly relies on the experience of the operator and the intraoperative image navigation system, but there are still problems such as inaccurate positioning, long operation time, radiation exposure and the like, which increase the risk of postoperative complications of the patient. In addition, the existing guide plate design is complex, inconvenient to operate, lacks stability, and is difficult to meet the needs of complex spinal deformity surgery.

[0004] Therefore, the prior art urgently needs an auxiliary device that can improve the implantation accuracy of the pedicle screw, shorten the operation time and reduce the operation risk. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a pedicle screw implantation guide plate, which aims to solve the problems of inaccurate positioning and complex operation in the process of implanting the pedicle screw in the prior art.

[0006] A pedicle screw implantation guide plate, comprising a holding part and at least two support arms connected to one end of the holding part for abutting against the pedicle, a avoiding position for avoiding the spinous process is arranged between the two adjacent support arms, a positioning assembly for pedicle screw implantation is arranged on the side adjacent to the avoiding position of at least one support arm, the positioning assembly comprises a positioning structure and a positioning channel for pedicle screw implantation through the positioning structure.

[0007] The utility model has the advantages that: by arranging the support arm and the avoiding position, the utility model can be stably fixed and not easily displaced in complex spinal deformity surgery; by arranging the positioning structure and the positioning channel, it is ensured that the pedicle screw can enter the pedicle at the best angle through the positioning channel, and the operator can directly implant the screw along the positioning channel through the fixation of the support arm, which improves the implantation accuracy of the pedicle screw and the operation efficiency, reduces the dependence on image navigation during the operation process, reduces the harm of the rays, and further improves the safety and effect of the scoliosis correction surgery.

[0008] Further, a notch for adjusting the implantation angle of the pedicle screw is arranged on the side of the bottom of the positioning structure away from the support arm.

[0009] Further, a positioning needle structure for pre-positioning of the pedicle screw implantation is arranged in the positioning channel.

[0010] Furthermore, the gripping part, the support arm, the positioning component, and the positioning pin structure are all made of medical-grade polymer material.

[0011] Furthermore, the diameter of the positioning channel is 4.5 mm to 5 mm.

[0012] Furthermore, a support portion is provided on the side of the support arm away from the positioning component to increase the pedicle abutment area.

[0013] Furthermore, a support portion for abutting the spinous process is hinged to the side of the grip portion facing the abutment portion.

[0014] Furthermore, the height of the support arm is 10mm to 30mm.

[0015] Furthermore, an anti-slip structure is provided on the outside of the grip portion for preventing slippage. Attached Figure Description

[0016] Figure 1 This is a first-view schematic diagram of the pedicle screw placement guide plate in an embodiment of this utility model;

[0017] Figure 2 This is a second-view schematic diagram of the pedicle screw placement guide plate in an embodiment of this utility model;

[0018] Explanation of key component symbols:

[0019] grip portion 10 positioning channel 15 support arm 11 notch 16 avoidance position 12 positioning needle structure 17 positioning assembly 13 abutment portion 18 positioning structure 14 anti-slip structure 19 support portion 20

[0020] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0024] Referring to Figures 1 to 2 The pedicle screw placement guide in the embodiment of the application comprises a holding part 10 and at least two support arms 11 connected to one end of the holding part 10 and used for abutting against the pedicle, a clearance 12 for avoiding the spinous process is arranged between the two adjacent support arms 11, and a positioning assembly 13 for pedicle screw placement is arranged on the side adjacent to the clearance 12 of at least one of the support arms 11, the positioning assembly 13 comprises a positioning structure 14 and a positioning channel 15 for pedicle screw placement and penetrating through the positioning structure 14.

[0025] It should be noted that in the embodiment, two support arms 11 are arranged, and the positioning assembly 13 for pedicle screw placement is arranged on the side adjacent to the clearance 12 of each of the two support arms 11.

[0026] It can be understood that, by arranging the support arms 11 and the clearance 12, the pedicle screw placement guide can be stably fixed and is not easy to be displaced in the complex spinal deformity surgery; by arranging the positioning structure 14 and the positioning channel 15, it is ensured that the pedicle screw can enter the pedicle at the optimal angle through the positioning channel 15, and the operator can directly place the pedicle screw along the positioning channel 15 through the fixation of the support arms 11, thereby improving the precision and the surgical efficiency of the pedicle screw placement, reducing the dependence on image navigation in the surgical process, reducing the harm of the radiation, and further improving the safety and the effect of the spinal scoliosis correction surgery.

[0027] Further, a gap 16 for adjusting the placement angle of the pedicle screw is arranged on the side of the bottom of the positioning structure 14 away from the support arm 11.

[0028] It can be understood that, by arranging the gap 16, the operator can visually measure the placement point of the pedicle screw through the gap 16 and adjust the placement angle of the pedicle screw, so as to ensure the accurate placement of the pedicle screw and reduce the error of the pedicle screw placement.

[0029] Further, a positioning needle structure 17 for pre-positioning of the pedicle screw placement is arranged in the positioning channel 15.

[0030] It can be understood that the positioning needle structure 17 is arranged to enable the operator to perform the pedicle screw placement pre-positioning on one side of the spine through the positioning needle structure 17.

[0031] Further, the holding part 10, the support arm 11 and the positioning assembly 13 are all medical-grade polymer materials.

[0032] It can be understood that by arranging the holding part 10, the support arm 11, the positioning assembly 13 and the positioning needle structure 17 as medical-grade polymer materials, the strength and biocompatibility can be ensured.

[0033] Further, the diameter of the positioning channel 15 is 4.5mm to 5mm.

[0034] It can be understood that by arranging the diameter of the positioning channel 15 to be 4.5mm to 5mm, different specifications of pedicle screws can be accommodated.

[0035] Further, the height of the support arm 11 is 10mm to 30mm.

[0036] It can be understood that by arranging the height of the support arm 11 to be 10mm to 30mm, different spinal deformities of patients can be accommodated.

[0037] Further, a supporting part 20 for abutting against the spinous process is hingedly arranged on one side of the holding part 10 facing the abutting part 18.

[0038] It can be understood that by arranging the supporting part 20, the utility model can be placed on the pedicle of the patient by abutting against the spinous process through the supporting part 20, thereby increasing the stability of the utility model placed on the pedicle.

[0039] Further, a supporting part 20 for abutting against the spinous process is hingedly arranged on one side of the holding part 10 facing the abutting part 18.

[0040] It can be understood that by arranging the supporting part 20, the utility model can be placed on the pedicle of the patient by abutting against the spinous process through the supporting part 20, thereby increasing the stability of the utility model placed on the pedicle.

[0041] Further, an anti-skid structure 19 for preventing slipping is arranged outside the holding part 10.

[0042] It can be understood that by arranging the anti-skid structure 19, the friction between the palm of the operator and the holding part 10 is increased.

[0043] By the utility model, average error of pedicle screw placement is reduced to 2.5 DEG, and the error of traditional method is usually above 5 DEG, this data is obtained through postoperative imaging evaluation, and the deviation of placement angle and ideal angle is compared using CT scanning, further makes the average operation time shorten about 30%, reduces from original 120 minutes to about 84 minutes, this data is based on the operation record of using the guide plate and traditional method, and the statistical analysis uses paired t test to ensure the reliability of the result, and the number of image navigation is reduced, the radiation exposure amount in operation reduces about 40%, the specific measurement is carried out through intraoperative radiation monitoring equipment, and the radiation dose of operator and patient is evaluated, and the guide plate is suitable for various complex deformities of cervical, thoracic and lumbar vertebrae, through clinical test, can be effectively applied in different spinal structures, and shows good versatility, and the transfer of operator between different vertebrae is more flexible, and the need of multiple repositioning is reduced.

[0044] To sum up, the pedicle screw placement guide plate in the above-mentioned embodiments of the utility model can be stably fixed and not easily displaced in complex spinal deformity surgery through the setting of the support arm and the avoidance position; the positioning structure and the positioning channel are set to ensure that the pedicle screw can enter the pedicle with the best angle through the positioning channel, and the operator can directly place the screw along the positioning channel through the fixation of the support arm, thereby improving the precision and efficiency of pedicle screw placement, reducing the dependence on image navigation during surgery, reducing the harm of radiation, and further improving the safety and effectiveness of the spinal scoliosis correction surgery.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A pedicle screw placement guide, characterized in that, The device comprises a holding part and at least two support arms connected to one end of the holding part for abutting against the pedicle of the vertebra, a clearance is arranged between the two adjacent support arms for avoiding the spinous process, a positioning assembly is arranged on the side of at least one of the support arms adjacent to the clearance for the placement of the pedicle screw, the positioning assembly comprises a positioning structure and a positioning channel penetrating through the positioning structure for the placement of the pedicle screw.

2. Pedicle screw placement guide according to claim 1, characterized in that A gap is arranged on the bottom of the positioning structure away from the side of the support arm for adjusting the angle of the placement of the pedicle screw.

3. The pedicle screw placement guide according to claim 1, wherein, A positioning needle structure is arranged in the positioning channel for the pre-positioning of the placement of the pedicle screw.

4. The pedicle screw placement guide according to claim 3, characterized in that The holding part, the support arm, the positioning assembly and the positioning needle structure are all made of medical grade polymer material.

5. The pedicle screw placement guide according to claim 1, wherein, The diameter of the positioning channel is 4.5mm to 5mm.

6. The pedicle screw placement guide according to claim 1, wherein, An abutting part is arranged on the side of the support arm away from the positioning assembly for increasing the abutting area of the pedicle.

7. The pedicle screw placement guide according to claim 6, characterized in that A support part is hingedly arranged on the side of the holding part towards the abutting part for abutting against the spinous process.

8. The pedicle screw placement guide according to claim 1, wherein, The height of the support arm is 10mm to 30mm.

9. The pedicle screw placement guide according to claim 1, wherein, An anti-skid structure is arranged on the outside of the holding part for preventing slipping.

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