Surgical instrument for assisting deep repair of triangular fibrocartilage complex insertion

Abstract

The application provides a surgical instrument for assisting in repairing deep insertion point of triangular fibrocartilage complex, and relates to the technical field of medical instruments. The surgical instrument for assisting in repairing deep insertion point of triangular fibrocartilage complex comprises a guide frame and a drilling guide plate. The guide frame is provided with a guide slide, the drilling guide plate is slidably arranged in the guide slide, and the guide slide is provided with a locking piece. One side of the top of the guide frame is provided with a positioning plate, the positioning plate is provided with a first positioning hole corresponding to the ulnar styloid process of a patient. The bottom surface of the drilling guide plate forms an angle β with a horizontal plane, and the height of the bottom plate of the drilling guide plate gradually increases from one side close to the positioning plate to the other side. The bottom surface of the drilling guide plate is provided with a first drilling hole, and the angle α between the first drilling hole and a vertical plane is equal to the angle β. The technical effect of reducing the difficulty of surgery is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to surgical instruments for assisting in the repair of deep insertion points of the triangular fibrocartilage complex. Background Technology

[0002] The triangular fibrocartilage complex (TFCC) is a cartilage-ligament complex located in the wrist joint. A complete TFCC effectively cushions the longitudinal impact of the carpal bones on the ulna and stabilizes the wrist joint during forearm rotation, preventing ulnar head dislocation. Damage to this structure can cause clinical symptoms including wrist pain that worsens with activity, decreased grip strength, and a reduced forearm rotation angle due to pain. Severe injuries can lead to significant wrist instability, impacting work and daily life. The deep insertion of the TFCC is located at the base of the ulnar styloid process; avulsion at this point is the most critical structure to repair in TFCC injuries.

[0003] Currently, based on the understanding of TFCC structure, clinicians use wrist arthroscopy to suture and repair deep insertion avulsions of TFCC. This surgery is effective. However, current research on the ligament-bone interface suggests that partially drilling holes on the bone side of the interface to expose the medullary tissue, allowing the medullary tissue with better healing potential to contact the ligament, can promote ligament-bone interface healing. However, repairing deep insertion TFCC requires constructing 2-3 bone tunnels with a diameter of 1-1.2 mm proximal to the ulnar styloid process, obliquely towards the ulnar fossa, while the diameter of the ulnar cross-section at this location is only about 8-10 mm. If the operation is performed solely based on the surgeon's experience, the surgery is difficult and carries a high risk of intraoperative fracture. Summary of the Invention

[0004] The purpose of this invention is to provide a surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex, so as to alleviate the technical problem of high surgical difficulty in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex, including a guide frame and a drilling guide plate;

[0006] The guide frame has a guide slide, the drilling guide plate is slidably disposed in the guide slide, and a locking element is disposed in the guide slide;

[0007] A positioning plate is provided on one side of the top of the guide frame, and a first positioning hole corresponding to the styloid process of the patient's ulna is provided on the positioning plate.

[0008] The bottom surface of the drilling guide plate forms an angle β with the horizontal plane, and the height of the bottom plate of the drilling guide plate gradually increases from the side closest to the positioning plate to the other side.

[0009] A first drill hole is formed on the bottom surface of the drilling guide plate, and the angle α between the first drill hole and the vertical plane is equal to the included angle β.

[0010] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein a plurality of second drill holes are provided on the drilling guide plate, and the difference between the angle γ between the extension direction of the plurality of second drill holes and the vertical plane and the angle β is between 1 and 10 degrees.

[0011] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the difference between the included angle γ and the included angle β is between 1 and 8 degrees.

[0012] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the difference between the included angle γ and the included angle β is between 1 and 5 degrees.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the difference between the included angle γ and the included angle β is between 1 and 3 degrees.

[0014] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the number of the second boreholes is four.

[0015] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the drilling guide plate is wedge-shaped.

[0016] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein guide grooves are provided on both sides of the guide frame, and the locking member passes through the guide grooves and is connected to the drilling guide plate.

[0017] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the locking member is a hand-tightening bolt;

[0018] The drilling guide plate has threaded holes on both sides.

[0019] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein a second positioning hole is provided at the bottom of the guide frame.

[0020] Beneficial effects:

[0021] This invention provides a surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex, comprising a guide frame and a drilling guide plate; the guide frame has a guide slide, the drilling guide plate is slidably disposed within the guide slide, and a locking element is provided within the guide slide; a positioning plate is provided on one side of the top of the guide frame, and a first positioning hole corresponding to the styloid process of the patient's ulna is formed on the positioning plate; the bottom surface of the drilling guide plate forms an angle β with the horizontal plane, and the height of the bottom plate of the drilling guide plate gradually increases from the side closer to the positioning plate to the other side; a first drill hole is formed on the bottom surface of the drilling guide plate, and the angle α between the first drill hole and the vertical plane is equal to the angle β.

[0022] Specifically, during the operation, medical staff place the positioning plate on the patient's ulnar styloid process. Then, under fluoroscopic guidance, a Kirschner wire is inserted into the patient's ulnar styloid process through the first positioning hole of the positioning plate, thereby fixing the guide frame to the patient's ulna. Under fluoroscopic guidance, the drilling guide plate is then adjusted up and down so that the extension line of the first drilling hole corresponds to the base of the deep insertion point of the triangular fibrocartilage complex. The guide wire is then inserted into the first drilling hole and drilled out from the base of the deep insertion point of the triangular fibrocartilage complex. The medical staff can then perform drilling operations under the guidance of the guide wire. This setup reduces the difficulty of drilling during the operation. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex provided in an embodiment of the present invention;

[0025] Figure 2 A perspective view of the surgical instrument for assisting in the repair of the deep insertion point of the triangular fibrocartilage complex provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex provided in an embodiment of the present invention.

[0027] icon:

[0028] 100 – Guide frame; 110 – Guide slide; 120 – Locking element; 130 – Positioning plate; 131 – First positioning hole; 140 – Second positioning hole; 150 – Guide groove;

[0029] 200 – Drilling guide plate; 210 – First drill hole; 220 – Second drill hole;

[0030] 300 – Ulnar styloid process. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0036] See Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex, including a guide frame 100 and a drilling guide plate 200; the guide frame 100 has a guide slide 110, the drilling guide plate 200 is slidably disposed within the guide slide 110, and a locking element 120 is disposed within the guide slide 110; a positioning plate 130 is disposed on one side of the top of the guide frame 100, and a first positioning hole 131 corresponding to the styloid process 300 of the patient's ulna is opened on the positioning plate 130; the bottom surface of the drilling guide plate 200 forms an angle β with the horizontal plane, and the height of the bottom plate of the drilling guide plate 200 gradually increases from the side closest to the positioning plate 130 to the other side; a first drill hole 210 is opened on the bottom surface of the drilling guide plate 200, and the angle α between the first drill hole 210 and the vertical plane is equal to the angle β.

[0037] Specifically, during the operation, medical staff place the positioning plate 130 on the patient's ulnar styloid process 300. Then, under fluoroscopic conditions, a Kirschner wire is inserted into the patient's ulnar styloid process 300 through the first positioning hole 131 of the positioning plate 130, thereby fixing the guide frame 100 on the patient's ulna. Under fluoroscopic conditions, the drilling guide plate 200 is adjusted up and down so that the extension line of the first drilling hole 210 corresponds to the base of the deep insertion point of the triangular fibrocartilage complex. Then, the guide wire is inserted from the first drilling hole 210 and drilled out from the base of the deep insertion point of the triangular fibrocartilage complex. The medical staff can then perform drilling operations under the guidance of the guide wire. This setup reduces the difficulty of drilling during the operation.

[0038] See Figure 1 , Figure 2 and Figure 3 As shown, the length CE is calculated based on the remaining length of the Kirschner wire fixed at the ulnar styloid process 300 (the Kirschner wire is inserted under fluoroscopic conditions so that its tip reaches point E). The distance AI from the bottom edge of the front of the drilling guide plate 200 to the bottom surface of the fixing platform of the fixing groove is AI = CE + √3(AC + EF) + 2HI. The guide wire is drilled through the first drill hole 210 on the bottom surface of the drilling guide plate 200, with a drilling length FH = 2DF + √3HI. At this point, the guide wire can be drilled out at the base of the deep insertion point of the triangular fibrocartilage complex, thereby providing a fresh bone tunnel to promote the repair of the deep insertion point.

[0039] The following methods can be used to ensure the stability and reliability of the guide pin's entry point:

[0040] ∠α=∠β=30°

[0041] We can obtain AD = CE, FG = 2DF, DG = √3DF, GI = 2HI, GH = √3HI

[0042] AI = AD + DG + GI

[0043] FH = FG + GH

[0044] achievable

[0045] AI = CE + √3(AC + EF) + 2HI

[0046] FH=2DF+√3HI

[0047] Among them, the drilling guide plate 200 is wedge-shaped.

[0048] In an optional embodiment, the drilling guide plate 200 is provided with a plurality of second drilling holes 220, and the difference between the angle γ and the angle β between the extension direction of the plurality of second drilling holes 220 and the vertical plane is between 1 and 10 degrees.

[0049] The difference between the included angle γ and the included angle β is between 1 and 8 degrees.

[0050] The difference between the included angle γ and the included angle β is between 1 and 5 degrees.

[0051] The difference between the included angle γ and the included angle β is between 1 and 3 degrees.

[0052] There are four second drill holes 220. This arrangement ensures that when the Kirschner wire exits through the second drill holes 220 from the base of the deep insertion point of the triangular fibrocartilage complex, it is located around the position where the Kirschner wire exits through the first drill hole 210 from the base of the deep insertion point of the triangular fibrocartilage complex.

[0053] The guide frame 100 has guide grooves 150 on both sides, and the locking member 120 passes through the guide grooves 150 and is connected to the drilling guide plate 200.

[0054] It should be noted that the locking component 120 uses a hand-tightening bolt; threaded holes are provided on both sides of the drilling guide plate 200.

[0055] See Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment, the bottom of the guide frame 100 is provided with a second positioning hole 140.

[0056] Specifically, a second positioning hole 140 is provided at the bottom of the guide frame 100, which can improve the fixation of the guide frame 100.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex, characterized in that, include: Guide frame (100) and drilling guide plate (200); The guide frame (100) has a guide slide (110), the drilling guide plate (200) is slidably disposed in the guide slide (110), and a locking member (120) is disposed in the guide slide (110). A positioning plate (130) is provided on one side of the top of the guide frame (100), and a first positioning hole (131) corresponding to the patient's ulnar styloid process (300) is provided on the positioning plate (130). The bottom surface of the drilling guide plate (200) forms an angle β with the horizontal plane, and the height of the bottom plate of the drilling guide plate (200) gradually increases from the side closest to the positioning plate (130) to the other side. The bottom surface of the drilling guide plate (200) is provided with a first drilling hole (210), and the angle α between the first drilling hole (210) and the vertical plane is equal to the angle β. The drilling guide plate (200) has a plurality of second drill holes (220), and the difference between the angle γ between the extension direction of the plurality of second drill holes (220) and the vertical plane and the angle β is between 1 and 10 degrees.

2. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to claim 1, characterized in that, The difference between the included angle γ and the included angle β is between 1 and 8 degrees.

3. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to claim 2, characterized in that, The difference between the included angle γ and the included angle β is between 1 and 5 degrees.

4. The surgical instrument for assisting in the repair of deep insertion points of the triangular fibrocartilage complex according to claim 1, characterized in that, The difference between the included angle γ and the included angle β is between 1 and 3 degrees.

5. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to claim 1, characterized in that, The number of the second borehole (220) is four.

6. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to any one of claims 1-5, characterized in that, The drilling guide plate (200) is wedge-shaped.

7. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to any one of claims 1-5, characterized in that, The guide frame (100) has guide grooves (150) on both sides, and the locking member (120) passes through the guide grooves (150) and is connected to the drilling guide plate (200).

8. The surgical instrument for assisting in the deep insertion point repair of the triangular fibrocartilage complex according to claim 7, characterized in that, The locking element (120) is a hand-tightening bolt; The drilling guide plate (200) has threaded holes on both sides.

9. The surgical instrument for assisting in the deep insertion repair of the triangular fibrocartilage complex according to any one of claims 1-5, characterized in that, The bottom of the guide frame (100) is provided with a second positioning hole (140).

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