Adjustable forward femoral intramedullary nail near-end drill bit sleeve
By designing an adjustable anteroposterior femoral intramarrow nail proximal drill head sleeve, the problem of inaccurate position position of the proximal guide needle and fixation screw is solved, achieving higher positioning accuracy and operating efficiency.
Patent Information
- Application Number
- CN202420129977.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-18
AI Technical Summary
When fracture fixation is performed using anterior femoral intramarrow nails, the implant position of the proximal guide needle and fixation screw is inaccurate, resulting in increased implantation difficulty.
An adjustable anteroposterior femoral intramarrow nail proximal drill bit sleeve is designed, including a guide sleeve, a pressurized thread structure and two sets of guide pinholes arranged in the long axis direction, through which the movement of the guide sleeve and The selection of guide pin holes reduces the difficulty of positioning the guide pins.
Through the use of this sleeve, the difficulty of positioning the proximal guide needle is reduced, the subsequent implantation of fixing screws is facilitated, and the accuracy and efficiency of overall operation are improved.
Smart Images
Figure CN222467027U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and in particular relates to an adjustable proximal drill sleeve for antegrade femoral intramedullary nails. Background Art
[0002] Intertrochanteric fracture is a common fracture disease that is prone to occur in the elderly. The common treatment method is to use an antegrade femoral intramedullary nail to fix the fracture site. After the antegrade femoral intramedullary nail is implanted into the patient's proximal femoral medullary cavity, a fixing screw needs to be used to pass through the screw holes distributed on the antegrade femoral intramedullary nail to fix the antegrade femoral intramedullary nail in the proximal femur. When performing antegrade femoral intramedullary nail fixation, the entry point of the fixing screw is often determined by implanting a proximal guide pin. The accuracy of the implantation position of the proximal guide pin will directly affect the position of the entry point of the fixing screw, and then affect the holding force of the fixing screw in the femoral head. Therefore, a guide handle is often used to guide the proximal guide pin and the fixing screw. The guide handle is fixed on the intramedullary nail, and the guide sleeve passes through the guide hole set on the guide handle. The proximal guide pin tube passes through the guide hole to guide the implantation position of the proximal guide pin. However, in actual use, due to individual differences, the positioning accuracy of the proximal guide pin implantation position is prone to deviation, resulting in increased difficulty in implanting the proximal guide pin and the fixing screw. Utility Model Content
[0003] The utility model aims to provide an adjustable proximal drill sleeve for antegrade femoral intramedullary nail, aiming to solve the problem that the proximal guide pin and fixing screw are difficult to implant after the antegrade femoral intramedullary nail is implanted.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an adjustable antegrade femoral intramedullary nail proximal drill sleeve, including a guide sleeve, a pressurized thread structure is arranged on the outer side of the upper end of the guide sleeve, and two groups of guide pin holes are arranged on the guide sleeve, and the guide pin holes are arranged along the long axis direction of the guide sleeve.
[0005] In a possible implementation, an outer side wall of the guide sleeve is provided with a guide surface, and the guide surface is arranged along the long axis direction of the guide sleeve.
[0006] In a possible implementation, the guide surface is arranged parallel to the plane where the two groups of guide pin holes are located.
[0007] In a possible implementation, the two groups of guide pin holes are symmetrically arranged on the midline of the guide sleeve.
[0008] In a possible implementation, the diameter of the guide needle hole is between 3.0 and 3.5 mm.
[0009] In a possible implementation, the shortest distance between the edges of the two groups of guide pin holes is between 1.7 and 2.3 mm.
[0010] In a possible implementation, a positioning top plate is provided on the edge of the lower end surface of the guide sleeve.
[0011] In a possible implementation, the positioning top plate is disposed on the midline of the guide sleeve where the two groups of guide pin holes are located.
[0012] In a possible implementation, the lower end surface of the guide sleeve is an inclined end surface, and the height of one end of the inclined end surface away from the positioning top plate is consistent with the height of the lower end of the positioning top plate.
[0013] In a possible implementation, an end stopper is provided at the upper end of the guide sleeve.
[0014] The utility model provides an adjustable proximal drill sleeve for antegrade femoral intramedullary nails with the following beneficial effects:
[0015] Compared with the prior art, a guide sleeve is provided, and a pressurized threaded structure is provided on the upper end of the guide sleeve to facilitate the up and down movement of the guide sleeve. Two groups of guide pin holes are provided along the long axis direction of the guide sleeve. When the proximal guide pin is implanted, a suitable guide pin hole is selected according to the actual situation to implant the proximal guide pin, which reduces the difficulty of positioning the proximal guide pin and facilitates the subsequent implantation of the fixing screw. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 Schematic diagram of the three-dimensional structure of the adjustable proximal drill sleeve of the intramedullary nail provided in the embodiment of the utility model Figure 1 ;
[0018] Figure 2 Schematic diagram of the three-dimensional structure of the adjustable proximal drill sleeve of the intramedullary nail provided in the embodiment of the utility model Figure 2 ;
[0019] Figure 3 This is a front view structural schematic diagram of the guide surface adopted in the embodiment of the utility model.
[0020] In the figure: 1. end stopper; 2. guide pin hole; 3. guide sleeve; 4. pressurized thread structure; 5. guide surface; 6. inclined end surface; 7. positioning top plate. DETAILED DESCRIPTION
[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0022] Please refer to Figures 1 to 3 A specific implementation of an adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model is now described, including a guide sleeve 3, a pressurized thread structure 4 is arranged on the outer side of the upper end of the guide sleeve 3, and two groups of guide pin holes 2 are arranged on the guide sleeve 3, and the guide pin holes 2 are arranged along the long axis direction of the guide sleeve 3.
[0023] The utility model provides an adjustable antegrade femoral intramedullary nail proximal drill sleeve. Compared with the prior art, the utility model is provided with a guide sleeve 3. A pressurized thread structure 4 is provided at the upper end of the guide sleeve 3 to facilitate the up and down movement of the guide sleeve 3. Two groups of guide pin holes 2 are provided along the long axis direction of the guide sleeve 3. When the proximal guide pin is implanted, a suitable guide pin hole 2 is selected according to the actual situation to implant the proximal guide pin, which reduces the difficulty of positioning the proximal guide pin and facilitates the subsequent implantation of the fixing screw.
[0024] For details, please refer to Figures 1 to 3 A guide pressure block is provided in conjunction with the guide handle. A threaded hole is provided on the guide pressure block, which matches the pressurized threaded structure 4 provided on the upper end of the guide sleeve 3. The guide pressure block is sleeved on the outside of the guide sleeve 3 and is threadedly connected to the guide sleeve 3. The lower end of the guide sleeve 3 is inserted into the guide hole on the guide handle. The guide pressure block is located at the upper end of the guide handle. The guide pressure block is rotated to control the guide sleeve 3 to move up and down on the guide handle, so that the guide sleeve 3 is pressed against the lateral cortex of the patient's proximal femur. According to the actual situation, a suitable guide pin hole 2 on the guide sleeve 3 is selected for the implantation of the proximal guide pin, which reduces the difficulty of positioning the proximal guide pin and facilitates the subsequent implantation of the fixing screw. The guide handle is removed to carry out the guided implantation of the fixing screw.
[0025] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 The outer wall of the guide sleeve 3 is provided with a guide surface 5 , and the guide surface 5 is arranged along the long axis direction of the guide sleeve 3 .
[0026] For details, please refer to Figures 1 to 3The guide surface 5 is arranged on the outer wall of the guide sleeve 3 along the long axis direction of the guide sleeve 3. The guide sleeve 3 matches the shape of the guide hole on the guide handle, and the guide sleeve 3 is limited to avoid the guide sleeve 3 from rotating during use, thereby increasing the stability of the device.
[0027] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 The guide surface 5 is arranged parallel to the plane where the two groups of guide pin holes 2 are located.
[0028] For details, please refer to Figures 1 to 3 The guide surface 5 is parallel to the plane where the two groups of guide pin holes 2 are located, and the direction of the guide pin holes 2 can be determined based on the guide surface 5.
[0029] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figure 1 , Figure 2 The two groups of guide pin holes 2 are symmetrically arranged on the center line of the guide sleeve 3.
[0030] For details, please refer to Figure 1 , Figure 2 The plane where the two groups of guide pin holes 2 are located is the mid-vertical plane of the guide sleeve 3, and they are symmetrically arranged relative to the center of the guide sleeve 3.
[0031] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figure 1 , Figure 2 The diameter of the guide needle hole 2 is between 3.0 and 3.5 mm.
[0032] For details, please refer to Figure 1 , Figure 2 The diameter of the guide needle hole 2 is between 3.0 and 3.5 mm, preferably 3.3 mm, to facilitate the insertion of the proximal guide needle.
[0033] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figure 1 , Figure 2 , the shortest distance between the edges of the two groups of guide pin holes 2 is between 1.7 and 2.3 mm.
[0034] For details, please refer to Figure 1 , Figure 2 The distance between the nearest points of the edges of the two groups of guide needle holes 2 is between 1.7 and 2.3 mm, preferably, 2 mm.
[0035] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 A positioning top plate 7 is provided on the edge of the lower end surface of the guide sleeve 3.
[0036] For details, please refer to Figures 1 to 3 The positioning top plate 7 is arranged on the lower end surface of the guide sleeve 3 and on the outer side wall of the guide sleeve 3, leaning against the outer cortex of the patient's femur to increase the stability of the device.
[0037] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 The positioning top plate 7 is arranged on the center line of the guide sleeve 3 where the two groups of guide needle holes 2 are located.
[0038] For details, please refer to Figures 1 to 3 , the midline of the positioning top plate 7 is coplanar with the midlines of the two groups of guide pin holes 2.
[0039] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 The lower end surface of the guide sleeve 3 is an inclined end surface 6 , and the height of the end of the inclined end surface 6 away from the positioning top plate 7 is consistent with the height of the lower end of the positioning top plate 7 .
[0040] For details, please refer to Figures 1 to 3 The lower end face of the guide sleeve 3 is an inclined oblique end face 6, and the height of the end of the oblique end face 6 away from the positioning top plate 7 is lower than the height of the end close to the positioning top plate 7. The lowermost end of the oblique end face 6 is consistent with the height of the lower end of the positioning top plate 7, which is convenient for leaning against the lateral cortex of the patient's femur and increasing the stability of the device.
[0041] As a specific implementation of the adjustable antegrade femoral intramedullary nail proximal drill sleeve provided by the utility model, please refer to Figures 1 to 3 An end stopper 1 is provided at the upper end of the guide sleeve 3.
[0042] For details, please refer to Figures 1 to 3 The end stopper 1 is arranged at the upper end of the guide sleeve 3 to facilitate taking the guide sleeve 3 .
[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An adjustable proximal drill sleeve for antegrade femoral intramedullary nail, characterized in that: It comprises a guide sleeve, the outer side of the upper end of which is provided with a pressurized thread structure, and the guide sleeve is provided with two groups of guide pin holes, which are arranged along the long axis direction of the guide sleeve.
2. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: The outer side wall of the guide sleeve is provided with a guide surface, and the guide surface is arranged along the long axis direction of the guide sleeve.
3. An adjustable antegrade femoral intramedullary nail proximal drill sleeve as claimed in claim 2, characterized in that: The guide surface is arranged parallel to the plane where the two groups of guide pin holes are located.
4. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: The two groups of guide pin holes are symmetrically arranged on the center line of the guide sleeve.
5. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: The diameter of the guide needle hole is between 3.0 and 3.5 mm.
6. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: The shortest distance between the edges of the two groups of guide pin holes is between 1.7 and 2.3 mm.
7. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: A positioning top plate is arranged on the edge of the lower end surface of the guide sleeve.
8. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 7, characterized in that: The positioning top plate is arranged on the center line of the guide sleeve where the two groups of guide pin holes are located.
9. An adjustable antegrade femoral intramedullary nail proximal drill sleeve as claimed in claim 8, characterized in that: The lower end surface of the guide sleeve is an inclined end surface, and the height of the end of the inclined end surface away from the positioning top plate is consistent with the height of the lower end of the positioning top plate.
10. The adjustable proximal drill sleeve for antegrade femoral intramedullary nail according to claim 1, characterized in that: An end stopper is arranged at the upper end of the guide sleeve.