Femoral neck hollow nail guide needle positioner

Abstract

The utility model relates to a femoral neck cannulated screw guide pin positioner, the femoral neck cannulated screw guide pin positioner comprises a pair of guide columns and a fixing assembly, a bulb is fixed on the side portion of each guide column in a protruding mode, and the fixing assembly comprises an upper clamping piece, a lower clamping piece and a fixing piece. The upper clamping piece and the lower clamping piece are suitable for clamping the ball head to enable the guide columns to be located on the left side and the right side respectively, and the fixing piece is rotatably installed on the upper clamping piece and the lower clamping piece to enable the upper clamping piece and the lower clamping piece to be close to each other to clamp the ball head so that the guide columns can be adjusted in any direction. After adjustment is completed, firm fixation can be achieved, and it is ensured that the guide needle is kept stable in the process of being placed through the guide column and is not interfered by body factors of a patient.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a femoral neck hollow nail guide pin positioner for treating femoral neck fractures. Background Technology

[0002] Femoral neck fractures are more common in middle-aged and elderly people, often related to osteoporosis-induced bone loss. Even minor torsional injuries, such as a fall while walking, can cause a fracture through indirect force transmission. Femoral neck fractures are relatively rare in adolescents, usually requiring more significant trauma. After a fracture, patients often experience symptoms such as hip pain, limited lower limb movement, lower limb pain, and deformity. Currently, treatment for femoral neck fractures mainly includes surgery and conservative treatment, with cannulated femoral neck fixation being a classic surgical procedure.

[0003] In clinical practice, most doctors still use manual positioning techniques. This is mainly because existing external positioning devices are insufficient in terms of effectiveness and ease of use, and have not yet been widely adopted. The accuracy of manual positioning techniques is constrained by various factors, such as the surgeon's experience, the actual situation of fracture reduction, the patient's obesity level, and muscle development. During manual needle insertion, the "drifting needle phenomenon" frequently occurs, meaning that the angle set externally for the guide needle changes after entering the patient's body due to the influence of muscles, fascia, and other tissues, making it impossible to accurately reach the ideal insertion position. This phenomenon is more pronounced in muscular and obese patients, seriously affecting surgical outcomes and potentially leading to prolonged operation time, increased patient trauma, and reduced screw placement quality. Utility Model Content

[0004] One advantage of this invention is that it provides a femoral neck hollow nail guide pin locator, which can be adjusted in any direction and can be firmly fixed after adjustment, ensuring that the guide pin remains stable during insertion and is not affected by the patient's physical condition.

[0005] Another advantage of this invention is that it provides a femoral neck hollow screw guide pin positioner, which can flexibly adjust the angle and position of the guide pin insertion.

[0006] Another advantage of this invention is that it provides a femoral neck hollow screw guide pin locator, which can be easily disassembled and assembled, whether in the surgical preparation stage or the postoperative storage stage, saving time and labor costs.

[0007] Another advantage of this utility model is that it provides a femoral neck hollow screw guide pin locator. The overall structure of the femoral neck hollow screw guide pin locator has few components, making it easy to disassemble and assemble. This greatly reduces the time required for subsequent disinfection and sterilization, saves the time for postoperative instrument turnover, and helps improve the efficiency of repeated use of the equipment.

[0008] According to another aspect of the present invention, the present invention further provides a femoral neck hollow screw guide pin positioner, the femoral neck hollow screw guide pin positioner comprising:

[0009] A pair of guide posts, each guide post having a ball head protruding and fixed to its side;

[0010] A fixing component includes an upper clamp and a lower clamp and a fixing member. The upper clamp and the lower clamp are adapted to clamp the ball head so that the guide post is located on the left and right sides respectively. The fixing member is rotatably mounted on the upper clamp and the lower clamp so that the upper clamp and the lower clamp are close to each other to clamp the ball head.

[0011] According to one embodiment of the present invention, the guide post further includes a limiting post, the limiting post protruding from the side of the guide post, and the ball head is mounted on the limiting post.

[0012] According to one embodiment of the present invention, the upper clamping piece extends into an upper spherical fitting end at both ends, and the lower clamping piece extends into a lower spherical fitting end at both ends. The upper spherical fitting end and the lower spherical fitting end are adapted to fit the arcuate surface of the ball head, and to fasten the ball head when the upper clamping piece and the lower clamping piece are close to each other.

[0013] According to one embodiment of the present invention, the guide post has a channel.

[0014] According to one embodiment of the present invention, the fixing member includes a bolt and a nut, the nut being fixed to the lower clamping piece, and the bolt being rotatably mounted on the nut from the upper clamping piece to bring the upper clamping piece close to the lower clamping piece.

[0015] According to one embodiment of the present invention, the bolt is a hand-tightening bolt.

[0016] According to one embodiment of the present invention, the fixing component further includes a washer, the washer being mounted on the upper clamping plate, and the bolt being adapted to be connected to the nut via the washer.

[0017] According to one embodiment of the present invention, the upper spherical fitting end has a plurality of first arc-shaped recesses, the first arc-shaped recesses being uniformly disposed on the inner surface of the upper spherical fitting end, and the lower spherical fitting end has a plurality of second arc-shaped recesses, the second arc-shaped recesses being uniformly disposed on the inner surface of the lower spherical fitting end.

[0018] According to one embodiment of the present invention, the ball head has a plurality of arc-shaped protrusions, which are evenly distributed on the surface of the ball head. When the upper clamping piece approaches the lower clamping piece, the arc-shaped protrusions are adapted to engage the first arc-shaped recess and the second arc-shaped recess to restrict the movement of the ball head.

[0019] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the femoral neck hollow nail guide pin positioner according to an embodiment of the present invention.

[0021] Figure 2 This is an exploded structural diagram of the femoral neck hollow nail guide pin positioner according to an embodiment of the present invention.

[0022] Figure 3 This is an exploded structural diagram of the femoral neck hollow nail guide pin positioner according to an embodiment of the present invention from another perspective.

[0023] Figure 4 This is a schematic diagram of the range of motion of the femoral neck hollow nail guide pin positioner according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the working state of the femoral neck hollow nail guide pin positioner according to an embodiment of the present utility model.

[0025] Figure 6 This is an exploded structural diagram of the femoral neck hollow nail guide pin positioner according to another embodiment of the present invention.

[0026] Figure 7 This is an exploded structural diagram of the femoral neck hollow nail guide pin positioner according to another embodiment of the present invention. Detailed Implementation

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] Reference Appendix Figure 1 To be continued Figure 3 As shown, the femoral neck hollow screw guide pin locator 6 of this application is illustrated. The femoral neck hollow screw guide pin locator 6 includes a pair of guide posts 10 and a fixing component 20. The fixing component 20 is adapted to fix the guide posts 10 on the left and right sides respectively, so that the guide pin can stably pass through the guide posts 10 through the femur, femoral neck, and femoral head to complete the positioning and installation. It can be understood that the guide posts 10 of the femoral neck hollow screw guide pin locator 6 can be adjusted in any direction. After adjustment, they can be firmly fixed to ensure that the guide pin remains stable during the insertion process and is not affected by the patient's physical factors.

[0031] In detail, the guide post 10 has a channel 11 that extends through the guide post along its central axial direction to facilitate the installation and arrangement of the guide pin. Those skilled in the art should understand that the channel 11 can also accommodate other instruments well-known to them, including but not limited to those listed above.

[0032] Specifically, the guide post 10 further includes a limiting post 12 and a ball head 13. The limiting post 12 protrudes from the side of the guide post 10, and the ball head 13 is installed at the end of the limiting post 12. The limiting post 12 is installed in the upper middle part of the guide post 10 to reduce the shaking of the guide post 10 around the limiting post 12, increase the stability of the guide post 10 when fixing the guide pin, and prevent further shaking of the guide pin. In this embodiment, the diameter of the limiting post 12 is slightly smaller than the diameter of the guide post 10. Those skilled in the art should understand that the diameter of the limiting post 12 can also be different to meet the needs of actual situations.

[0033] The ball head 13 is an integral sphere, with one end fixed to the limiting post 12. The ball head 13 can be connected to the limiting post 12 by threads or can be manufactured by integral molding. It is understood that the connection between the ball head 13 and the limiting post 12 can be including but not limited to the methods listed above.

[0034] The fixing component 20 includes an upper clamping piece 21, a lower clamping piece 22, and a fixing member 23. The fixing member 23 is adapted to connect the upper clamping piece 21 and the lower clamping piece 22 and to bring the upper clamping piece 21 and the lower clamping piece 22 close to each other.

[0035] Both ends of the upper clip 21 extend into an upper spherical fitting end 211, such as... Figure 2 and Figure 3 As shown, the upper spherical fitting end 211 is hemispherical. It is worth mentioning that the curvature of the inner surface of the hemispherical shape of the upper spherical fitting end 211 is consistent with the surface curvature of the ball head 13. That is to say, the upper spherical fitting end 211 can be completely and tightly fitted to the ball head 13, making the relative friction between the two very large. It is understandable that under pressure, the upper spherical fitting end 211 and the ball head 13 can easily generate huge friction to limit their relative movement.

[0036] The upper spherical fitting end 211 is symmetrically arranged at both ends of the upper clamping piece 21. Preferably, the upper spherical fitting end 211 is integrally formed on the upper clamping piece 21 to ensure the overall structural strength of the upper clamping piece 21. The upper spherical fitting end 211 can also be fixed to the upper clamping piece 21 in other optional fixing methods, including but not limited to the fixing methods listed above.

[0037] The upper clamp 21 is semi-cylindrical in shape. The upper clamp 21 can be made of metal or other high-strength plastic integrally formed. In particular, a platform parallel to the bottom edge is opened in the middle of the upper clamp 21, and the hole for mounting the fastener 23 is provided on the platform.

[0038] The lower clamping piece 22 and the upper clamping piece 21 are symmetrically distributed in their overall structure. Specifically, each end of the lower clamping piece 22 extends into a spherical fitting end 221, such as... Figure 2 and Figure 3 As shown, the lower spherical fitting end 221 is hemispherical. It is worth mentioning that the curvature of the inner surface of the hemispherical lower spherical fitting end 221 is consistent with the surface curvature of the ball head 13. That is to say, the lower spherical fitting end 221 can be completely and tightly fitted to the ball head 13, making the relative friction between the two very large. It is understandable that under pressure, the lower spherical fitting end 221 and the ball head 13 can easily generate huge friction to limit their relative movement.

[0039] The lower spherical fitting end 221 is symmetrically arranged at both ends of the lower clamping piece 22. Preferably, the lower spherical fitting end 221 is integrally formed on the lower clamping piece 22 to ensure the overall structural strength of the lower clamping piece 22. The lower spherical fitting end 221 can also be fixed to the lower clamping piece 22 in other optional ways, including but not limited to the fixed ways listed above.

[0040] The lower clamp 22 is semi-cylindrical in shape. The material of the lower clamp 22 can be metal or other high-strength plastic integrally formed. In particular, a platform parallel to the bottom edge is opened in the middle of the lower clamp 22, and the hole for mounting the fastener 23 is provided on the platform.

[0041] The overall length of the upper clamp 21 and the lower clamp 22 should be less than the length of the guide post 10, so that the operator can easily adjust the angle and orientation of the guide post 10, while avoiding a decrease in tightening force due to its excessive length.

[0042] The fixing component 23 includes a bolt 231, a washer 232, and a nut 233. The washer 232 is installed on the upper clamping plate 21, specifically at the middle platform position of the upper clamping plate 21. The nut 233 is fixed to the bottom of the lower clamping plate 22 at a position corresponding to the washer 232. The bolt 231 fixes the upper clamping plate 21 and the lower clamping plate 22 to the nut 233 via the washer 232. The ball head 13 is fixed via the upper spherical fitting end 211 and the lower spherical fitting end 221, thereby fixing the guide posts 10 on both sides. This allows the femoral neck hollow screw guide pin locator 6 to be adjusted in any direction. After adjustment, it can be firmly fixed, ensuring that the guide pin remains stable during insertion and is not affected by the patient's physical condition. At the same time, the femoral neck hollow screw guide pin locator 6 has a small number of overall structural components, making it easy to disassemble and assemble, which also facilitates sterilization and saves postoperative instrument turnover time, thus improving the efficiency of repeated use of the equipment.

[0043] In detail, the bolt 231 passes through the washer 232, then through the upper clamp 21 and the lower clamp 22 to the nut 233. By rotating the bolt 231, the bolt 231 approaches the washer 233. The bolt 231 transmits the tightening force to the upper clamp 21 through the washer 232, forcing the upper clamp 21 to approach the lower clamp 22. At this time, the ball heads 13 of the guide posts 10 on the left and right sides are located between the upper spherical contact end 211 and the lower spherical contact end 221. When the upper clamp 21 approaches the lower clamp 22, the upper spherical fitting end 211 and the lower spherical fitting end 221 can completely and tightly fit the ball head 13. Under pressure, a huge frictional force is formed between the hemispherical inner surfaces of the upper spherical fitting end 211 and the lower spherical fitting end 221 and the outer surface of the ball head 13 to restrict the movement of the ball head 13, that is, to restrict the movement of the guide post 10. Thus, it can be firmly fixed after adjustment, ensuring that the guide needle remains stable during insertion.

[0044] Reference Appendix Figure 4 The diagram shows the range of motion of the guide post 10 of the femoral neck hollow screw guide pin positioner 6. It can be understood that the distance between the upper clamp 21 and the lower clamp 22 is adjusted by the bolt 231 to control the pressure on the ball head 13, thereby adjusting the position and angle of the guide post 10. After adjustment, the bolt 231 is tightened to complete the fixation.

[0045] Reference Appendix Figure 5The diagram shown is a schematic representation of the working state of the femoral neck hollow screw guide pin locator 6. The guide pin 8 is fixed in the femur after being guided by the guide post 10. The guide post 10 is then adjusted to the desired position and tightened by the bolt 231, ensuring that the guide posts 10 on both sides remain relatively fixed. This fixation ensures that the guide pin remains stable during insertion and is not affected by the patient's physical condition.

[0046] As attached Figure 6 and attached Figure 7 The image shows another embodiment of the ball head 13, the upper spherical fitting end 211, and the lower spherical fitting end 221 of the femoral neck hollow screw guide pin positioner 6 described in this application. Unlike the previous embodiment, in this embodiment, the ball head 13A has multiple arc-shaped protrusions 131, which are evenly distributed on the surface of the ball head 13A. The upper spherical fitting end 211A has multiple first arc-shaped recesses 2111. The first arc-shaped protrusion 2111 is uniformly disposed on the inner surface of the upper spherical fitting end 211A. The lower spherical fitting end 221A has a plurality of second arc-shaped recesses 2211. The second arc-shaped recesses 2211 are uniformly disposed on the inner surface of the lower spherical fitting end 221A. When the upper clamping piece 21A approaches the lower clamping piece 22A, the arc-shaped protrusion 131 is adapted to engage the first arc-shaped recesses 2111 and the second arc-shaped recesses 2211 to restrict the movement of the ball head 13A.

[0047] Understandably, the arc-shaped protrusion 131 increases the surface area of ​​the ball head 13A, the first arc-shaped recess 2111 increases the inner surface area of ​​the upper spherical fitting end 211A, and the second arc-shaped recess 2211 increases the inner surface area of ​​the lower spherical fitting end 221A. The contact area between the ball head 13A and the upper and lower spherical fitting ends 211A and 221A increases, and the corresponding frictional force also increases proportionally under the same pressure. This further strengthens the fixing ability of the upper clip 21A and the lower clip 22A on the ball head 13A, that is, fixing the guide post 10A. Thus, after adjustment, the femoral neck hollow nail guide pin positioner 6A can firmly fix the guide pin, ensuring stability during insertion.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A femoral neck hollow screw guide pin positioner, characterized in that, include: A pair of guide posts, each guide post having a ball head protruding and fixed to its side; A fixing component includes an upper clamp and a lower clamp and a fixing member. The upper clamp and the lower clamp are adapted to clamp the ball head so that the guide post is located on the left and right sides respectively. The fixing member is rotatably mounted on the upper clamp and the lower clamp so that the upper clamp and the lower clamp are close to each other to clamp the ball head.

2. The femoral neck hollow screw guide pin positioner according to claim 1, wherein the guide post further includes a limiting post, the limiting post protruding from the side of the guide post, and the ball head is mounted on the limiting post.

3. The femoral neck hollow screw guide pin locator according to claim 2, wherein the upper clip extends an upper spherical fitting end at both ends, and the lower clip extends a lower spherical fitting end at both ends, the upper spherical fitting end and the lower spherical fitting end are adapted to fit the arcuate surface of the ball head, and to fasten the ball head when the upper clip and the lower clip are close to each other.

4. The femoral neck hollow screw guide pin positioner according to claim 3, wherein the guide pin has a channel.

5. The femoral neck hollow screw guide pin locator according to claim 4, wherein the fixing member includes a bolt and a nut, the nut being fixed to the lower clamping plate, and the bolt being rotatably mounted on the nut from the upper clamping plate to bring the upper clamping plate close to the lower clamping plate.

6. The femoral neck hollow screw guide pin locator according to claim 5, wherein the bolt is a hand-tightening bolt.

7. The femoral neck hollow screw guide pin positioner according to claim 5, wherein the fixation component further includes a washer, the washer being mounted on the upper clamp, and the bolt being adapted to be connected to the nut via the washer.

8. The femoral neck hollow screw guide pin positioner according to claim 3, wherein the upper spherical fitting end has a plurality of first arc-shaped recesses, the first arc-shaped recesses being uniformly disposed on the inner surface of the upper spherical fitting end, and the lower spherical fitting end has a plurality of second arc-shaped recesses, the second arc-shaped recesses being uniformly disposed on the inner surface of the lower spherical fitting end.

9. The femoral neck hollow screw guide pin locator according to claim 8, wherein the ball head has a plurality of arc-shaped protrusions, the arc-shaped protrusions are evenly distributed on the surface of the ball head, and the arc-shaped protrusions are adapted to engage the first arc-shaped recess and the second arc-shaped recess when the upper clip is close to the lower clip, so as to restrict the movement of the ball head.

10. The femoral neck hollow screw guide pin locator according to claim 9, wherein the fixing member includes a bolt and a nut, the nut being fixed to the lower clamping plate, and the bolt being rotatably mounted on the nut from the upper clamping plate to bring the upper clamping plate close to the lower clamping plate.

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