A femoral neck parallelizer

Abstract

The utility model belongs to the technical field of fracture fixation auxiliary instrument, specifically relates to a femoral neck parallel guider, including the seat body, the seat body is distributed with a plurality of through and mutually parallel linear guide hole, a first linear guide hole with locking is included among a plurality of linear guide holes, the locking mechanism on the first linear guide hole can lock the first guide needle that is passed into the first linear guide hole, make the relative position of seat body and first guide needle fixed, establish stable three -dimensional space reference system through with the first guide needle locking guider, the rest linear guide hole is parallel arrangement based on the axis of first guide needle, ensure that the needle direction of subsequent guide needle is strictly identical, and whether the needle point is appropriate can be judged without drilling into the femoral neck for subsequent guide needle, reduce the operation time and the drilling frequency.

Description

Technical Field

[0001] This utility model belongs to the technical field of fracture fixation auxiliary devices, specifically relating to a femoral neck parallel guide. Background Technology

[0002] Femoral neck fractures are common hip fractures in orthopedics. Percutaneous cannulated screw fixation is the gold standard for internal fixation treatment of femoral neck fractures. Optimal biomechanical stability is achieved when three cannulated screws are inserted into the femoral neck in an inverted triangular shape, with all three screws close to the femoral neck cortex. In clinical practice, after the initial guide screw angle is satisfactory, the surgeon must insert subsequent guide screws parallel to this benchmark. This process requires repeated fluoroscopic confirmation, increasing radiation exposure to both patients and medical staff, jeopardizing their health, and also increasing surgical time and blood loss. More importantly, the drilling operations performed in the femoral cortex to adjust the guide screw entry point significantly increase the risk of screw loosening by 18% for each additional drilling site. Utility Model Content

[0003] This invention aims to solve the problem of difficulty in determining the insertion point of the guide needle in the treatment of femoral neck fractures using currently used guide devices.

[0004] This utility model provides the following technical solution: a femoral neck parallel guide, including a base body, on which a plurality of through and parallel linear guide holes are distributed, including a first linear guide hole with locking, and the locking mechanism on the first linear guide hole can lock the first guide needle inserted into the first linear guide hole, so that the relative position of the base body and the first guide needle is fixed.

[0005] Furthermore, a fastening screw is threaded onto the wall of the first linear guide hole. The fastening screw is screwed in and out radially along the first linear guide hole, and is used to tighten and fix the first guide pin.

[0006] Furthermore, the linear guide holes on the base are arranged in a straight line.

[0007] Furthermore, the base includes a thick-walled tube and several thin-walled tubes, with the centerlines of the thick-walled tube and the several thin-walled tubes aligned. The outer walls of the thick-walled tube and the thin-walled tube are connected to each other. The tube hole of the thick-walled tube serves as the first linear guide hole, and the tube hole of the thin-walled tube serves as the linear guide hole. The fastening screw is screwed into the screw hole of the thick-walled tube.

[0008] Furthermore, the base is made of stainless steel.

[0009] Furthermore, the ends of the thick-walled tube and the thin-walled tube are aligned.

[0010] Furthermore, there are two fastening screws on the thick-walled tube.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] This invention provides a femoral neck parallel guide that establishes a stable three-dimensional spatial reference system by locking the guide to the first guide pin, avoiding positioning deviations caused by repeated adjustments of the guide in traditional surgery. The remaining linear guide holes are arranged parallel to the axis of the first guide pin, ensuring strict consistency in the insertion direction of multiple guide pins, achieving a high degree of alignment between the femoral neck axis and the internal fixation device axis, and reducing the risk of postoperative internal fixation loosening or dislocation. Attached Figure Description

[0013] Figure 1 A schematic diagram of a femoral neck parallel guide;

[0014] Figure 2 Illustration of the use of the femoral neck parallel guide Figure 1 .

[0015] In the figure: 1-base; 1.1-thick-walled tube; 1.2-thin-walled tube; 2-linear guide hole; 3-first linear guide hole; 4-first guide pin; 5-fastening screw; 6-other guide pins; 7-body. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] like Figure 1 , Figure 2 As shown: A femoral neck parallel guide includes a base 1, on which a plurality of through and parallel linear guide holes 2 are distributed. Among the plurality of linear guide holes 2, there is a first linear guide hole 3 with locking. The locking mechanism on the first linear guide hole 3 can lock the first guide needle 4 that passes through the first linear guide hole 3, so that the relative position of the base 1 and the first guide needle 4 is fixed.

[0018] A fastening screw 5 is threaded onto the wall of the first linear guide hole 3. The fastening screw 5 is screwed in and out radially along the first linear guide hole 3. The fastening screw 5 is used to abut and fix the first guide pin 4. When the fastening screw 5 is tightened, the seat 1 is clamped and fixed on the first guide pin 4, and the other guide pins 6 can be optionally inserted into the linear guide hole 2. When the fastening screw 5 is loosened, the angle of the fastening screw 5 can be changed.

[0019] The straight guide holes 2 on the base 1 are arranged in a straight line. The base 1 includes a thick-walled tube 1.1 and several thin-walled tubes 1.2. The center lines of the thick-walled tube 1.1 and the several thin-walled tubes 1.2 are aligned. The outer walls of the thick-walled tube 1.1 and the thin-walled tubes 1.2 are connected. The tube hole of the thick-walled tube 1.1 serves as the first straight guide hole 3, and the tube hole of the thin-walled tube 1.2 serves as the straight guide hole 2. The fastening screw 5 is screwed into the screw hole of the thick-walled tube 1.1.

[0020] The thick-walled tube 1.1 and the thin-walled tube 1.2 are aligned at both ends.

[0021] In one embodiment, the thick-walled tube 1.1 is a stainless steel tube with an outer diameter of 5 mm, an inner diameter of 3.2 mm, and a length of 5 cm; the thin-walled tube 1.2 is a stainless steel tube with an outer diameter of 3.5 mm, an inner diameter of 3.2 mm, and a length of 5 cm. The thick-walled tube 1.1 and the thin-walled tube 1.2 are welded together in a row. The thick-walled tube 1.1 has two fastening screws 5. The thin-walled tube 1.2 has a thinner hole wall, allowing for fine adjustment of the guide needle's entry point.

[0022] The base 1 can also be a structure in which the first linear guide hole 3 and the linear guide hole 2 are opened on an integral component.

[0023] The femoral neck parallel guide in this embodiment allows the guide needle to be inserted into the femoral neck after the needle entry point is determined. In contrast, the parallel guide used in clinical practice requires the needle to be inserted into the femoral neck before the entry point can be observed. It allows the passage of 3.0 mm diameter Kirschner wires, avoiding the change in direction of the Kirschner wire after passing through the skin when using 2.5 mm diameter Kirschner wires.

[0024] In use, first insert the first guide pin 4 into the femoral neck, then fix the seat 1 to the first guide pin 4 after adjusting the angle through the thick-walled tube 1.1 and the fastening screw 5. Then, probe the insertion points of the other guide pins through the straight guide holes 2 of the other thin-walled tubes 1.2. After determining the insertion point, insert the guide pin with the target straight guide hole 2 as the guide.

[0025] Determine if the needle insertion point is appropriate based on the fluoroscopic image: if the insertion point is appropriate, the needle can be drilled into the femoral neck; if it is not appropriate, the insertion point can be readjusted; the outer diameter of the stainless steel tube is 3.5mm, which helps to quantify and fine-tune the insertion point.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A femoral neck parallel guide, characterized in that: It includes a base (1), on which a number of through and parallel linear guide holes (2) are distributed. Among the number of linear guide holes (2), there is a first linear guide hole (3) with locking. The locking mechanism on the first linear guide hole (3) can lock the first guide pin (4) that passes through the first linear guide hole (3), so that the relative position of the base (1) and the first guide pin (4) is fixed.

2. The femoral neck parallel guide according to claim 1, characterized in that: The first linear guide hole (3) has a threaded fastening screw (5) on its hole wall. The fastening screw (5) is screwed in and out radially along the first linear guide hole (3). The fastening screw (5) is used to abut and fix the first guide pin (4).

3. A femoral neck parallel guide according to claim 1 or 2, characterized in that: The linear guide holes (2) on the seat (1) are arranged in a straight line.

4. The femoral neck parallel guide according to claim 3, characterized in that: The base (1) includes a thick-walled tube (1.1) and several thin-walled tubes (1.2). The center lines of the thick-walled tube (1.1) and the several thin-walled tubes (1.2) are aligned. The outer walls of the thick-walled tube (1.1) and the thin-walled tubes (1.2) are connected. The tube hole of the thick-walled tube (1.1) serves as the first straight guide hole (3), and the tube hole of the thin-walled tube (1.2) serves as the straight guide hole (2). The fastening screw (5) is screwed into the screw hole of the thick-walled tube (1.1).

5. A femoral neck parallel guide according to claim 4, characterized in that: The base (1) is a component made of stainless steel.

6. A femoral neck parallel guide according to claim 4, characterized in that: The thick-walled tube (1.1) and the thin-walled tube (1.2) are aligned at both ends.

7. A femoral neck parallel guide according to claim 4, characterized in that: The thick-walled tube (1.1) has two fastening screws (5).

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