Guiding instrument for manufacturing ulna tunnel during wrist arthroscopic surgery

Abstract

The utility model relates to the technical field of medical instruments, in particular to a guiding instrument for manufacturing an ulna tunnel during a wrist arthroscopic surgery, which comprises an upper forceps arm and a lower forceps arm which are rotatably connected. A positioning plate is installed at the left end of the lower clamp arm in a hinged mode, a guide drill hole is formed in the left end of the lower clamp arm in a glued mode, bolts are inserted in the positions, hinged to the upper clamp arm and the lower clamp arm, of the positioning plate and the guide drill hole respectively, and movable grooves are formed in the right end of the upper clamp arm and the right end of the lower clamp arm respectively. The two movable grooves are provided with locking assemblies used for adjusting the opening angle of the upper clamp arm and the lower clamp arm. According to the ulna drilling forceps, the left ends of the upper forceps arm and the lower forceps arm are clamped on the ulna of a patient, and the ulna drilling part is positioned through the positioning plate and the guide drilling hole, so that a doctor can conveniently insert a drill bit into the guide drilling hole to drill the ulna, the ulna can be rapidly drilled, the operation time is greatly shortened, and the operation quality and safety are obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery. Background Art

[0002] The triangular fibrocartilage complex is the most important structure for maintaining the stability of the distal radioulnar joint. TFCC injury caused by trauma or degeneration is one of the common injuries of the wrist joint. After injury, the distal radioulnar joint will be unstable, causing wrist pain and reduced flexion and grip strength, which seriously affects the patient's work and life. At present, most TFCC injuries are repaired under wrist arthroscopy. For milder superficial TFCC tears, they can be repaired by suturing through the joint capsule under the microscope; while for more serious deep TFCC tears, it is necessary to drill a bone tunnel in the ulna and suture through the bone tunnel. Establishing an ulnar tunnel is one of the difficulties of this operation, which depends more on the surgeon's experience and skills. For doctors who are not experienced in this operation, in order to establish an ulnar tunnel with an accurate position, it is often necessary to drill repeatedly, which may cause iatrogenic damage to the TFCC. To this end, we proposed a guiding instrument for making an ulnar tunnel during wrist arthroscopy to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery, so as to solve the problem mentioned in the above background technology that in order to establish an ulnar tunnel with an accurate position, it is often necessary to drill repeatedly, which may cause iatrogenic damage to the TFCC.

[0004] To achieve the above object, the utility model provides the following technical solution: a guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery, comprising an upper clamp arm and a lower clamp arm, wherein the upper clamp arm and the lower clamp arm are rotatably connected;

[0005] A positioning plate is hingedly installed on the left end of the lower clamp arm, and a guide drill hole is glued to the left end of the lower clamp arm. Bolts are inserted into the positioning plate and the guide drill hole at the hinges with the upper clamp arm and the lower clamp arm respectively. Movable grooves are opened in the right ends of the upper clamp arm and the lower clamp arm, and two groups of the movable grooves are installed with locking components for adjusting the opening angles of the upper clamp arm and the lower clamp arm.

[0006] Preferably, a groove is provided at the upper end of the positioning plate, and the inner wall diameter of the groove is the same as the inner wall diameter of the guide drill hole.

[0007] Preferably, both upper and lower ends of the two groups of movable grooves are trumpet-shaped, and the openings at both upper and lower ends of the two groups of movable grooves are smaller than the diameter of the middle inner wall.

[0008] Preferably, the locking assembly comprises two groups of universal beads, the two groups of universal beads are installed in two groups of movable grooves, opposing screws are inserted in the two groups of universal beads through threads, and a knob is installed in the middle part of the opposing screws.

[0009] Preferably, the inner wall diameter of the guide drill hole is between three millimeters and five millimeters.

[0010] Preferably, the positioning plate and the guide drilling hole are both made of stainless steel.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model clamps the left ends of the upper forceps arm and the lower forceps arm on the patient's ulna, and positions the drilling site of the ulna through the positioning plate and the guide drilling hole, making it easy for the doctor to insert the drill bit into the guide drilling hole to drill the ulna, thereby quickly drilling the ulna, greatly reducing the operation time, and significantly improving the quality and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a left side schematic diagram of the structure of the utility model;

[0015] Figure 3 It is a schematic diagram of a front cross-section of the structure of the utility model;

[0016] Figure 4 For this utility model Figure 3 A is a partial enlarged schematic diagram;

[0017] Figure 5 For this utility model Figure 3 A partial enlarged schematic diagram of B in the figure.

[0018] In the figure: 1. upper clamp arm; 2. lower clamp arm; 3. positioning plate; 4. guide drilling hole; 5. groove; 6. bolt; 7. movable groove; 8. universal ball; 9. opposing screw; 10. knob. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 , the utility model provides an embodiment: a guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery, comprising an upper clamp arm 1 and a lower clamp arm 2, the upper clamp arm 1 and the lower clamp arm 2 are rotatably connected;

[0021] A positioning plate 3 is hingedly installed on the left end of the lower clamp arm 2, and a guide drilling hole 4 is glued and installed on the left end of the lower clamp arm 2. Bolts 6 are inserted at the hinges of the positioning plate 3 and the guide drilling hole 4 with the upper clamp arm 1 and the lower clamp arm 2 respectively. A movable groove 7 is opened in the right end of the upper clamp arm 1 and the lower clamp arm 2. The two sets of movable grooves 7 are installed with locking components for adjusting the opening angles of the upper clamp arm 1 and the lower clamp arm 2. The device allows the positioning plate 3 to enter through the ulnar approach to fit the ulnar drilling outlet, and then fit the guide drilling hole 4 to the ulna through the skin incision, and fix the upper clamp arm 1 and the lower clamp arm 2 through the locking component, so that the positioning plate 3 and the guide drilling hole 4 can be fixed and fitted to the ulnar drilling position, and then the drill bit is inserted from the guide drilling hole 4 to drill the ulna, thereby improving the efficiency of drilling the ulna;

[0022] Furthermore, a groove 5 is provided at the upper end of the positioning plate 3, and the inner wall diameter of the groove 5 is the same as the inner wall diameter of the guide drilling hole 4. This structure is based on the groove 5 on the positioning plate 3, so that after the drill bit passes through the ulna, the bone residue is collected through the groove 5, and the drill bit is inserted into the groove 5 after drilling out, and will not cause damage to the nearby bones or flesh after passing through the ulna.

[0023] Furthermore, both ends of the two groups of movable grooves 7 are trumpet-shaped, and the openings at both ends of the two groups of movable grooves 7 are smaller than the diameter of the middle inner wall. This structure allows the locking assembly to have a certain amount of spatial tilting movement within the two groups of movable grooves 7 according to the shape of the inner walls of the two groups of movable grooves 7.

[0024] Furthermore, the locking assembly includes two groups of universal balls 8, which are installed in two groups of movable grooves 7. Opposing screws 9 are inserted into the two groups of universal balls 8 through threads, and a knob 10 is installed in the middle of the opposing screws 9. This structure adjusts the opening angle of the upper clamp arm 1 and the lower clamp arm 2 by twisting the knob 10 and rotating the opposing screw 9, and after the upper clamp arm 1 and the lower clamp arm 2 are opened, they are fixed by the self-locking effect of the opposing screws 9 and the two groups of universal balls 8 threads.

[0025] Furthermore, the inner wall diameter of the guide drilling hole 4 is between three millimeters and five millimeters. According to the inner wall diameter of the guide drilling hole 4, the drill bit used for drilling the ulna is generally about two and a half millimeters, so that the guide drilling hole 4 can be adapted for use.

[0026] Furthermore, the positioning plate 3 and the guide drill hole 4 are both made of stainless steel. According to the material of the positioning plate 3 and the guide drill hole 4, the structure can have a strong effect when the positioning plate 3 and the guide drill hole 4 collide with the drill bit, and has a certain durability.

[0027] Working principle: When drilling a hole in the ulna, Figure 3 , Figure 4 and Figure 5 As shown, the positioning plate 3 is introduced through the ulnar approach, and the positioning plate 3 is fitted with the predetermined drilling hole outlet of the ulna, and then the guide drilling hole 4 is inserted through the skin incision to fit the ulna, and the guide drilling hole 4 is placed at the predetermined drilling hole on the outside of the ulna, and the positioning plate 3 and the guide drilling hole 4 are adjusted to the connection between the upper clamp arm 1 and the lower clamp arm 2 by two groups of bolts 6, so that the positioning plate 3 and the guide drilling hole 4 are fitted to the ulna to be drilled at different angles when the upper clamp arm 1 and the lower clamp arm 2 are opened, and the opposing screw rod 9 and the knob 10 are twisted, and the opposing screw rod 9 rotates in the two groups of universal balls 8, so that the upper clamp arm 1 and the lower clamp arm 2 are adjusted to open at different angles by the opposing screw rod 9, and the upper clamp arm 1 and the lower clamp arm 2 are adjusted by the opposing screw rod 9. After the upper clamp arm 1 and the lower clamp arm 2 are adjusted, they are limited and fixed, and the drill bit is inserted from the guide drilling hole 4 to drill the ulna, and the drill bit is drilled out of the ulna to complete the drilling of the ulna. The above is the entire working principle of the utility model.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery, comprising an upper clamp arm (1) and a lower clamp arm (2), wherein the upper clamp arm (1) and the lower clamp arm (2) are rotatably connected; Features: A positioning plate (3) is hingedly mounted on the left end of the lower clamp arm (2), and a guide drill hole (4) is gluedly mounted on the left end of the lower clamp arm (2). Bolts (6) are inserted into the hinged parts of the positioning plate (3) and the guide drill hole (4) with the upper clamp arm (1) and the lower clamp arm (2), respectively. Movable grooves (7) are provided in the right ends of the upper clamp arm (1) and the lower clamp arm (2), and two groups of the movable grooves (7) are installed with locking components for adjusting the opening angles of the upper clamp arm (1) and the lower clamp arm (2).

2. The guiding device for making an ulnar tunnel during wrist arthroscopy surgery according to claim 1, characterized in that: A groove (5) is provided at the upper end of the positioning plate (3), and the inner wall diameter of the groove (5) is the same as the inner wall diameter of the guide drill hole (4).

3. The guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery according to claim 1, characterized in that: The upper and lower ends of the two groups of movable grooves (7) are both trumpet-shaped, and the openings at the upper and lower ends of the two groups of movable grooves (7) are both smaller than the diameter of the middle inner wall.

4. The guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery according to claim 1, characterized in that: The locking assembly comprises two groups of universal beads (8), the two groups of universal beads (8) are installed in two groups of movable grooves (7), opposing screw rods (9) are inserted in the two groups of universal beads (8) through threads, and a knob (10) is installed in the middle of the opposing screw rods (9).

5. The guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery according to claim 1, characterized in that: The inner wall diameter of the guide drill hole (4) is between three millimeters and five millimeters.

6. The guiding instrument for making an ulnar tunnel during wrist arthroscopy surgery according to claim 1, characterized in that: The positioning plate (3) and the guide drilling hole (4) are both made of stainless steel.

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