Adjustable positioner for femoral side of inner patellofemoral ligament

Abstract

The utility model discloses an adjustable positioner for the femoral side of an inner patellofemoral ligament. Comprising a connecting handle; the fixing column is vertically arranged at the front end of the connecting handle, and an axial through center hole is formed in the center of the fixing column; the pair of scales are horizontally and transversely arranged, and the base parts of the pair of scales are respectively connected with the upper end and the lower end of the fixed column; and the pair of sliding rulers are horizontally and longitudinally arranged and are respectively arranged on the scale ruler in a sliding manner, and guide holes are formed in the far ends of the sliding rulers. The inner patellofemoral ligament femur tunnel establishing device has the advantages that the position of the middle point of the saddle groove is determined through the scale ruler and the sliding ruler which are arranged at the upper end and the lower end of the fixing column, an operator is assisted in establishing an inner patellofemoral ligament femur tunnel at a time, repeated perspective and inaccurate touch in an operation are avoided, operation difficulty is reduced, and operation quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an adjustable femoral side locator for the medial patellofemoral ligament. Background Art

[0002] The knee joint is one of the most complex joints in the human body, and patellar dislocation is a common sports injury of the knee joint. As one of the main surgical methods for the treatment of patellar dislocation, medial patellofemoral ligament reconstruction has achieved certain clinical effects. However, there has always been controversy about femoral side positioning. The mainstream imaging positioning method is difficult to obtain a pure lateral position by intraoperative fluoroscopy, and its positioning reference point is not an anatomical point, so there are problems such as large tunnel positioning deviation and high postoperative failure rate, and at the same time, it increases radiation exposure. Recently, with the quantitative analysis and research of the anatomical positioning point ("saddle groove"), intraoperative palpation of the saddle groove can ensure femoral side positioning. However, intraoperative palpation of the saddle groove is not easy to complete for inexperienced surgeons, and not all patients have a saddle groove structure in the medial femoral condyle, which has become an obstacle restricting the application of saddle groove anatomical positioning. With the proposal of the saddle groove ratio reference positioning method (63%-40%), the adjustable femoral side locator for the medial patellofemoral ligament has become a reliable guarantee for saddle groove positioning, which helps to reduce the surgical difficulty, improve the surgical quality and promote the new technology. Content of the Utility Model

[0003] The purpose of the utility model is to provide an adjustable femoral side locator for the medial patellofemoral ligament, which determines the position of the saddle groove through the scale rulers and sliding rulers arranged at the upper and lower ends of the fixed column, and assists the surgeon to establish the femoral tunnel of the medial patellofemoral ligament at one time, so as to avoid repeated intraoperative fluoroscopy, inaccurate palpation, reduce the surgical difficulty, and improve the surgical quality and efficiency.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions, including:

[0005] A connecting handle;

[0006] A fixed column, which is vertically arranged at the front end of the connecting handle, and a central hole penetrating axially is arranged in the center of the fixed column;

[0007] A pair of scale rulers, which are horizontally arranged, and the bases of the pair of scale rulers are respectively connected to the upper end and the lower end of the fixed column;

[0008] A pair of sliding rulers, which are horizontally and longitudinally arranged and are respectively slidably arranged on the scale rulers, and a guiding hole is arranged at the distal end of the sliding ruler.

[0009] Preferably, it further includes:

[0010] A plurality of positioning holes, which are respectively evenly arranged at the front part of the connecting handle.

[0011] Preferably, it further includes:

[0012] A first slot, which is arranged at the center of the scale ruler along the length direction;

[0013] A second slot, which is arranged at the center of the sliding ruler along the length direction;

[0014] A bolt, which sequentially passes through the second slot and the first slot from top to bottom;

[0015] A first limiting block, whose outer periphery is adapted to the first slot, and a first threaded hole adapted to the bolt is provided at the center for sleeving on the lower part of the bolt;

[0016] A second limiting block, whose outer periphery is adapted to the second slot, and a second threaded hole adapted to the bolt is provided at the center for sleeving on the upper part of the bolt.

[0017] Preferably, scale lines are respectively provided on the scale ruler and the sliding ruler.

[0018] Preferably, the bolt is a butterfly bolt.

[0019] Preferably, a limiting rib extending inwards is arranged on the upper edge of the first slot; a limiting protrusion extending outwards is arranged on the upper edge of the second limiting block.

[0020] Preferably, it further includes:

[0021] A holding handle, which is arranged at the end of the connecting handle for facilitating holding.

[0022] The beneficial effect of the present utility model is that: by setting the scale ruler and the sliding ruler at the upper and lower ends of the fixed column, the midpoint position of the saddle groove is determined, assisting the surgeon to establish the femoral tunnel of the medial patellofemoral ligament at one time, so as to avoid repeated fluoroscopy during the operation, inaccurate touching, reduce the operation difficulty, and improve the operation quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional view of an adjustable locator for the femoral side of the medial patellofemoral ligament of the present utility model Figure 1 .

[0024] Figure 2 is a three-dimensional view of an adjustable locator for the femoral side of the medial patellofemoral ligament of the present utility model Figure 2 .

[0025] Figure 3 is an exploded view of the scale ruler and the sliding ruler in the present utility model.

[0026] Figure 4 is a schematic diagram for locating the midpoint of the saddle groove of the medial patellofemoral ligament. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further elaborates on the utility model in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the text of the specification.

[0028] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or other elements or their combinations.

[0029] As Figures 1-4 shown, an adjustable femoral-side locator 1 for the medial patellofemoral ligament of the present utility model includes:

[0030] A connecting handle 110. As a preference, it further includes: a plurality of positioning holes 111 evenly distributed at the front of the connecting handle 110. As a further preference, it further includes: a holding handle provided at the end of the connecting handle 110 for easy holding.

[0031] A fixing column 120 is vertically provided at the front end of the connecting handle 110, and a central hole 121 axially penetrating is provided in the center of the fixing column 120.

[0032] A pair of scale rulers 130 are horizontally and transversely arranged, and the bases of the pair of scale rulers 130 are respectively connected to the upper end and the lower end of the fixing column 120; a pair of sliding rulers 140 are horizontally and longitudinally arranged and are respectively slidably arranged on the scale rulers 130, and a guiding hole 143 is provided at the distal end of the sliding ruler 140. As a preference, it further includes: a first slot 131 is provided along the length direction at the center of the scale ruler 130; a second slot 141 is provided along the length direction at the center of the sliding ruler 140; a bolt 150 sequentially passes through the second slot 141 and the first slot 131 from top to bottom; a first limiting block 132 has an outer circumference adapted to the first slot 131, and a first threaded hole adapted to the bolt 150 is provided at the center of the first limiting block 132, and the first limiting block 132 is used to sleeve the lower part of the bolt 150; an outer circumference of a second limiting block 142 is adapted to the second slot 141, and a second threaded hole adapted to the bolt 150 is provided at the center of the second limiting block 142, and the second limiting block 142 is used to sleeve the upper part of the bolt 150. As a further preference, it further includes: scale lines 134 and scale lines 144 are respectively provided on the scale ruler 130 and the sliding ruler 140. The 0 scale line of the scale line 134 is located at the base of the scale ruler 130; the 0 scale line of the scale line 144 is located at the distal end of the sliding ruler 140. As a further preference, the bolt 150 is a butterfly bolt. As a further preference, a limiting rib 133 extending inward is provided at the upper edge of the first slot 131.

[0033] During use, first, based on the CT image data, a three-dimensional reconstruction of the patient's knee joint is performed to accurately measure the distance L from the vertex A of the adductor tubercle to the vertex B of the medial epicondyle. Then, according to the actual situation of the patient and the distance L, loosen the bolt 150, adjust the first limit block 132 to the scale line at the 63%L length on the scale 130, adjust the second limit block 142 to the scale line at the 40%L length on the sliding scale 140, and then tighten the bolt 150. Next, align the fixing column 120 of the adjustable medial patellofemoral ligament femoral-side locator 1 with the adductor tubercle, and the scale line at the L length on the scale 130 is vertically aligned with the vertex of the medial epicondyle. At this time, the position indicated by the center of the guiding hole is the positioning point C (the midpoint of the saddle groove). Use auxiliary tools such as guide pins and drills to establish a tunnel to complete the surgical positioning and drilling operation.

[0034] In another embodiment, it further includes: a plurality of positioning holes 111, which are respectively and evenly arranged at the front part of the connecting handle 110.

[0035] In another embodiment, it further includes: a first slot 131 is arranged along the length direction at the center of the scale 130; a second slot 141 is arranged along the length direction at the center of the sliding scale 140; the bolt 150 passes through the second slot 141 and the first slot 131 in sequence from top to bottom; the outer circumference of the first limit block 132 is adapted to the first slot 131, and a first threaded hole adapted to the bolt 150 is provided at the center of the first limit block 132, and the first limit block 132 is used to sleeved on the lower part of the bolt 150; the outer circumference of the second limit block 142 is adapted to the second slot 141, and a second threaded hole adapted to the bolt 150 is provided at the center of the second limit block 142, and the second limit block 142 is used to sleeved on the upper part of the bolt 150.

[0036] In another embodiment, scale lines 134 and 144 are respectively provided on the scale 130 and the sliding scale 140. The 0 scale line of the scale line 134 is located at the base of the scale 130; the 0 scale line of the scale line 144 is located at the distal end of the sliding scale 140.

[0037] In another embodiment, the bolt 150 is a wing nut.

[0038] In another embodiment, a limiting rib 133 extending inward is arranged at the upper edge of the first slot 131; a limiting protrusion 142a extending outward is provided at the upper edge of the second limit block 142.

[0039] In another embodiment, it further includes: a holding handle is arranged at the end of the connecting handle 110 for easy holding.

[0040] In summary, for the adjustable femoral positioning device 1 of the medial patellofemoral ligament of the present utility model, by means of the scale 130 and the sliding scale 140 provided at the upper and lower ends of the fixing column 120, the midpoint position of the saddle groove is determined to assist the surgeon in establishing the femoral tunnel of the medial patellofemoral ligament at one time, so as to avoid repeated fluoroscopy during the operation, inaccurate palpation, reduce the surgical difficulty, and improve the surgical quality and efficiency.

[0041] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples here.

Claims

1. An adjustable femoral-side locator for the medial patellofemoral ligament, characterized in that Including: Connecting handle; Fixed column, which is vertically arranged at the front end of the connecting handle, and a central hole penetrating axially is provided in the center of the fixed column; A pair of scale rulers, which are horizontally arranged transversely, and the bases of the pair of scale rulers are respectively connected to the upper end and the lower end of the fixed column; A pair of sliding rulers, which are horizontally arranged longitudinally and are respectively slidably arranged on the scale rulers, and a guiding hole is provided at the distal end of the sliding ruler.

2. The adjustable femoral positioning device for the medial patellofemoral ligament according to claim 1, characterized in that Also including: A plurality of positioning holes, which are respectively evenly arranged at the front part of the connecting handle.

3. The adjustable femoral positioning device for the medial patellofemoral ligament according to claim 1 or 2, characterized in that Also including: The first slot, which is arranged along the length direction at the center of the scale ruler; The second slot, which is arranged along the length direction at the center of the sliding ruler; A bolt, which sequentially passes through the second slot and the first slot from top to bottom; The first limiting block, whose outer periphery is adapted to the first slot, and a first threaded hole adapted to the bolt is provided in the center for sleeving on the lower part of the bolt; The second limiting block, whose outer periphery is adapted to the second slot, and a second threaded hole adapted to the bolt is provided in the center for sleeving on the upper part of the bolt.

4. The adjustable femoral positioning device for the medial patellofemoral ligament according to claim 3, characterized in that, Also including: Scale lines are respectively provided on the scale ruler and the sliding ruler.

5. The adjustable femoral positioning device for the medial patellofemoral ligament according to claim 3, wherein Also including: The bolt is a butterfly bolt.

6. The adjustable femoral-side locator for the medial patellofemoral ligament according to claim 3, wherein: A limiting rib extending inwards is arranged on the upper edge of the first slot; a limiting protrusion extending outwards is provided on the upper edge of the second limiting block.

7. The adjustable femoral-side locator for the medial patellofemoral ligament according to claim 3, wherein Also including: A holding handle, which is arranged at the end of the connecting handle for easy holding.

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