Novel positioning device for intraoperative prosthesis implantation in hip replacement surgery
By designing a novel positioning device for prosthesis implantation in hip replacement surgery, and using telescopic struts and rotating columns to adjust the fixation point of the acetabular rim bone, the problems of low accuracy of manual positioning and long time consumption of navigation technology are solved, achieving high-precision and simple acetabular prosthesis positioning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-03-24
AI Technical Summary
In current hip replacement surgery, manual positioning methods rely on the surgeon's experience and are not very accurate. Computer navigation technology is time-consuming and its accuracy decreases in patients with high BMI. Existing positioning devices also have problems with individual differences and complex operation.
A novel positioning device for prosthesis implantation in hip replacement surgery has been designed, including a telescopic strut, an adjusting sleeve, an insertion rod, and a screw plug. By arbitrarily selecting the acetabular rim bone as a fixation point, the telescopic strut and rotating column are used to adjust the angle, and the acetabular prosthesis is positioned in conjunction with the acetabular trial mold, simplifying the operation process.
It achieves highly accurate acetabular prosthesis positioning with limited exposure, simplifies the operation steps, is suitable for reusable or disposable sterilization, and reduces surgical complexity and time.
Smart Images
Figure CN224023742U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to surgical auxiliary instrument technical field, specifically is hip joint replacement surgery in operation prosthesis implantation novel positioning device. BACKGROUND
[0002] Total hip arthroplasty is one of the most common surgical methods for treating serious hip diseases such as late-stage hip osteoarthritis, hip dysplasia, avascular necrosis of the femoral head, ankylosing spondylitis, and hip tumors, and accurate positioning of the acetabular prosthesis in total hip arthroplasty is the key to the success of the operation.
[0003] Current positioning methods can be divided into manual methods, navigation positioning, and robotic positioning. Manual positioning is the most widely used due to its convenience, speed, and economy, and the acetabular transverse ligament is the most common anatomical reference for manual positioning. The disadvantage is that it relies on the experience of the surgeon and has high technical requirements. The surgeon needs to be very familiar with the anatomy of the acetabular transverse ligament, and the intraoperative field exposure is also very important. Unclear vision will affect the judgment of the acetabular transverse ligament shape, and individual differences will also affect the placement of the acetabular prosthesis. Computer navigation technology assisted THA surgery has the advantages of high precision and small trauma, but the early clinical effect is similar to that of traditional surgery, and the operation time is longer. When using navigation technology for patients with high BMI, the accuracy of the prosthesis placement may decrease, and the pelvic tilt movement during the operation will affect the angle of the prosthesis, which requires artificial pre-assisted positioning. Therefore, the hip joint replacement surgery in operation prosthesis implantation novel positioning device is proposed. SUMMARY
[0004] The purpose of the present utility model is to provide a hip joint replacement surgery in operation prosthesis implantation novel positioning device to solve the problems raised in the background art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] The hip joint replacement surgery in operation prosthesis implantation novel positioning device comprises a telescopic support rod, an adjusting pad connected to the end of the telescopic support rod, and a rotating column connected to both sides of the adjusting pad.
[0007] An adjusting sleeve is provided with a movable hole for the telescopic support rod to move close to one end of the adjusting pad, the adjusting pad is placed in the adjusting sleeve, and strip-shaped holes are provided on both sides of the adjusting sleeve for the rotating column to move.
[0008] A placement rod is arranged at the bottom of the adjusting sleeve, and the top of the placement rod is connected to the adjusting sleeve through a connecting piece.
[0009] A screw plug is screwed onto the adjusting sleeve to limit the adjusting pad.
[0010] In an alternative, the top of the movable hole is in communication with the outside.
[0011] In an alternative, the inner wall of the adjusting sleeve is provided with internal threads matched with the threads of the screw plug.
[0012] In an alternative, the adapter includes a limiting block and an adapter column fixed at the bottom of the limiting block, the adapter column is threadedly connected to the top of the inserted rod, the bottom of the adjusting sleeve is provided with a through hole for the adapter column to pass through, and the outer diameter of the limiting block is greater than the inner diameter of the through hole.
[0013] In an alternative, the limiting block and the bottom of the adjusting sleeve are both provided with a plurality of anti-skid grooves, and the bottom of the inner cavity of the adjusting sleeve and the top of the inserted rod are both provided with a plurality of rubber anti-skid protrusions corresponding to the anti-skid grooves.
[0014] In an alternative, the outer diameter of the adjusting pad is smaller than the inner diameter of the adjusting sleeve.
[0015] Compared with the prior art, the present application has the following beneficial effects:
[0016] In the present application, any point can be selected as a fixed point as long as the acetabular rim bone is exposed, then the positioning device is installed, the smallest acetabular trial is placed at the acetabular bottom, the anteversion and abduction angles are evaluated, the telescopic support rod is adjusted to be consistent with the direction of the acetabular trial rod at this time, the telescopic support rod is fixed by the screw plug, which is an effective aiming device in operation, the positioning device is simple and practical, and the positioning device can be removed after the acetabular prosthesis is placed, and can be reused or used once. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The figure is a structural schematic diagram of the present application.
[0018] Figure 2 The figure is a split structural schematic diagram of the adjusting sleeve and the screw plug in the present application.
[0019] Figure 3 The figure is a split structural schematic diagram of the adjusting pad and the adjusting sleeve in the present application.
[0020] Figure 4 The figure is a split structural schematic diagram of the inserted rod of the adjusting sleeve in the present application.
[0021] In the figure: 100, telescopic support rod; 200, adjusting sleeve; 300, inserted rod; 400, screw plug; 101, adjusting pad; 102, rotating column; 201, movable hole; 202, strip hole; 203, through hole; 301, limiting block; 302, adapter column. DETAILED DESCRIPTION
[0022] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "joint", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the intermediate medium indirectly connect, can be two element inside's intercommunication or two element's interaction relationship, unless another definite limitation.For the ordinary skill in the art, the above terms can be understood according to the specific meaning in the utility model of the specific situation.
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model.
[0024] Please refer to Figures 1-4 In the embodiment, the new positioning device for prosthesis implantation in hip replacement surgery includes a telescopic support rod 100, the telescopic support rod 100 is connected with an adjusting pad 101 at one end, and the adjusting pad 101 is connected with a rotating column 102 at both sides.
[0025] An adjusting sleeve 200 is provided with a movable hole 201 for the telescopic support rod 100 to move close to one end of the adjusting pad 101, the adjusting pad 101 is arranged in the adjusting sleeve 200, and the adjusting sleeve 200 is provided with a strip-shaped hole 202 for the rotating column 102 to move at both sides.
[0026] A placement rod 300 is arranged at the bottom of the adjusting sleeve 200, and the placement rod 300 is connected with the adjusting sleeve 200 through a connecting piece at the top.
[0027] A screw plug 400 is screwed on the adjusting sleeve 200 to limit the adjusting pad 101.
[0028] According to the above scheme, the telescopic support rod 100 can be adjusted in length according to the requirements, and any point on the acetabular rim bone can be selected as a fixed point, then the placement rod 300 is installed at the fixed point, the telescopic support rod 100 can be adjusted to swing around the axis of the rotating column 102, the height of the rotating column 102 can also be adjusted, and the telescopic support rod 100 can also drive the placement rod 300 to rotate to the appropriate angle at the fixed point, so that the telescopic support rod 100 is consistent with the direction of the acetabular trial rod, the bottom of the rotating column 102 can also be inserted with other gauze or cotton balls as support, then the screw plug 400 is connected to reduce the movement of the adjusting pad 101.
[0029] Furthermore, the top of the movable hole 201 is connected to the outside, facilitating the movement of the telescopic support rod 100.
[0030] Furthermore, the inner wall of the adjusting sleeve 200 is provided with an internal thread that mates with the threaded plug 400; the plug 400 can be installed on the adjusting sleeve 200 and the connection height can be adjusted.
[0031] like Figure 4 As shown, the connector includes a limiting block 301 and a connecting post 302 fixed to the bottom of the limiting block 301. The connecting post 302 is threaded to the top of the insert rod 300. The bottom of the adjusting sleeve 200 is provided with a through hole 203 for the connecting post 302 to pass through. The outer diameter of the limiting block 301 is larger than the inner diameter of the through hole 203.
[0032] Furthermore, the bottom of both the limiting block 301 and the adjusting sleeve 200 is provided with several anti-slip grooves, and the bottom of the inner cavity of the adjusting sleeve 200 and the top of the insertion rod 300 are provided with several rubber anti-slip protrusions corresponding to the anti-slip grooves; this improves the stability of the installation of the limiting block 301 and the connecting column 302, and makes the adjusting sleeve 200 and the insertion rod 300 stably connected.
[0033] Furthermore, the outer diameter of the adjusting pad 101 is smaller than the inner diameter of the adjusting sleeve 200, which facilitates the movement of the adjusting pad 101 within the adjusting sleeve 200.
[0034] The working principle of this utility model is as follows: The telescopic support rod 100 can be telescopically adjusted as needed. Any point can be selected as the fixed point to expose the acetabular rim bone. Then, the insertion rod 300 is installed at the fixed point. The telescopic support rod 100 can be adjusted to swing around the axis of the rotating column 102. The height of the rotating column 102 can also be adjusted to a suitable angle as a reference. The telescopic support rod 100 can also drive the insertion rod 300 to rotate at the fixed point to a suitable angle so that the telescopic support rod 100 is aligned with the direction of the acetabular trial mold rod. Other gauze or cotton balls can also be inserted into the bottom of the rotating column 102 for support. Then, the screw plug 400 can be connected to reduce the movement of the adjusting pad 101.
[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A new positioning device for the intraoperative implantation of a prosthesis in hip replacement surgery, characterized in that, The utility model provides a telescopic support rod and adjusting sleeve, which belongs to the field of household appliances. The telescopic support rod (100) is connected with the adjusting pad (101) at the end, and the adjusting pad (101) is connected with the rotating column (102) at both sides. The adjusting sleeve (200) is provided with the movable hole (201) for the telescopic support rod (100) to move close to one end of the adjusting pad (101) on one side, and the adjusting pad (101) is arranged in the adjusting sleeve (200); the adjusting sleeve (200) is provided with the strip-shaped hole (202) for the rotating column (102) to move on both sides. The insertion rod (300) is arranged at the bottom of the adjusting sleeve (200), and the top of the insertion rod (300) is connected with the adjusting sleeve (200) through the connecting piece. The screw plug (400) is screwed on the adjusting sleeve (200) and is used for limiting the adjusting pad (101).
2. The new positioning device for hip replacement surgery intraoperative prosthesis implantation according to claim 1, characterized in that: The top of the movable hole (201) is communicated with the outside.
3. The new positioning device for hip replacement surgery intraoperative prosthesis implantation according to claim 1, characterized in that: The inner wall of the adjusting sleeve (200) is provided with the internal thread matched with the screw plug (400).
4. The new positioning device for hip replacement surgery intraoperative prosthesis implantation according to claim 1, characterized in that: The connecting piece comprises the limiting block (301) and the connecting column (302) fixed at the bottom of the limiting block (301), the connecting column (302) is screwed on the top of the insertion rod (300), the bottom of the adjusting sleeve (200) is provided with the perforation (203) for the connecting column (302) to pass through, and the outer diameter of the limiting block (301) is larger than the inner diameter of the perforation (203).
5. The new positioning device for hip replacement surgery intraoperative prosthesis implantation according to claim 4, characterized in that: The limiting block (301) and the bottom of the adjusting sleeve (200) are provided with a plurality of anti-skid grooves, and the bottom of the inner cavity of the adjusting sleeve (200) and the top of the insertion rod (300) are provided with a plurality of rubber anti-skid protrusions corresponding to the anti-skid grooves.
6. The new positioning device for hip replacement surgery intraoperative prosthesis implantation according to claim 1, characterized in that: The outer diameter of the adjusting pad (101) is smaller than the inner diameter of the adjusting sleeve (200).