A device for assisting in guiding and positioning a nail for a scaphoid fracture

Abstract

This utility model discloses an auxiliary device for guiding and positioning nailing in scaphoid fractures, belonging to the field of orthopedic surgical instrument technology. The device includes a base with a silicone armrest on top. The armrest's front end is hinged to a palm rest plate via a fan-shaped plate. An arc-shaped block and a second bolt are used to adjust and fix the wrist flexion angle. A ball-joint guide joint is installed on the left side of the base via a support arm. The ball joint has a guide channel inside, and multi-angle adjustment and locking are achieved through a split clamp and locking bolt. The bottom of the silicone armrest is slidably connected to a protruding slide rail via a snap-fit ​​seat. The support arm can adapt to different slot positions. This utility model achieves multi-directional precise positioning of the guide pin through the ball-joint guide joint. The silicone armrest and palm rest plate work together to adjust the wrist angle. Combined with the multi-dimensional adjustment mechanism of the base slide rail and slots, it effectively improves surgical adaptability and operational flexibility.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic surgical instrument technology, specifically relating to an auxiliary scaphoid fracture guiding and positioning nailing device. Background Technology

[0002] The scaphoid bone, also known as the carpal bone, is the longest and largest of the proximal carpal bones. Scaphoid fractures are common and among the most frequent carpal fractures. Currently, surgical fixation is the primary treatment for periarticular bone fractures, including open reduction and internal fixation (ORM) and percutaneous screw fixation. Open reduction exposes the fracture ends through a dorsal or palmar incision, and after direct visualization, the fracture is reduced and fixed with Herbert screws or Kirschner wires. Percutaneous screw fixation involves inserting a guide wire percutaneously under C-arm fluoroscopy and then screwing in a cannulated screw along the guide wire.

[0003] During peripheral bone surgery, auxiliary devices are needed to guide and position screws or pins. Most existing auxiliary guiding and positioning devices are inefficient, lack flexibility in angle adjustment, and cannot be adapted to different patient conditions. Furthermore, the angle between the patient's arm and hand needs adjustment depending on the fracture situation, and existing devices cannot adequately meet these surgical requirements. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes an auxiliary scaphoid fracture guidance and positioning nailing device. By utilizing a guide hole within the ball-joint guide joint, the direction adjustment of the guidance and positioning becomes more flexible. Furthermore, the cooperation between the silicone arm support and the palm support plate allows for adjustment of the wrist flexion angle while fixing the patient's arm and palm, meeting the needs of different situations. Simultaneously, a multi-dimensional spatial adjustment mechanism is formed through a composite adjustment structure consisting of a protruding slide rail and multiple slots on the base, ensuring an optimal match between the guidance and positioning reference point and the patient's limb position.

[0005] To achieve the technical objectives mentioned above, this utility model is implemented through the following technical solution: an auxiliary scaphoid fracture guiding and positioning nailing device, comprising a base, the base being in the shape of a flat plate, a silicone arm support mounted at the center of the upper part of the base, a semi-circular fan-shaped plate mounted at the front end of the silicone arm support, a hinge hole vertically opened at the center of the fan-shaped plate and a palm support plate hinged thereto, so that the angle between the palm support plate and the silicone arm support is adjustable; a ball hinge guide joint is mounted on the left side of the base via a support arm, the ball head of the ball hinge guide joint has a through hole penetrating the center of the ball and a guide tube installed in the through hole, the guide tube is hollow inside and has a smooth inner wall, used to guide the precise insertion of guide pins or screws, and the guide tube can be flexibly adjusted in all directions by rotating the ball hinge guide joint.

[0006] Furthermore, a split clamp is installed above the ball joint seat of the ball hinge guide joint. The split clamp is an open ring and contacts the ball head of the ball hinge guide joint. The split clamp has threaded holes symmetrically opened on the left and right sides of the opening and locking bolts are fitted on them. The tightness of the split clamp on the ball head can be adjusted by adjusting the tightness of the locking bolts, so as to realize the locking and releasing of the ball hinge guide joint.

[0007] Furthermore, a spring is sleeved around the locking bolt, with the two ends of the spring connected to the left and right sides of the split clamp opening, respectively. The spring allows the split clamp to reset and loosen after locking the ball head, preventing the ball hinge guide joint from being locked.

[0008] The silicone arm support is equipped with an arm strap, which has a ladder buckle and can be adjusted in length to fix the patient's arm to the silicone arm support.

[0009] The palm support plate is equipped with a palm strap, which has a ladder buckle and can be adjusted in length to fix the patient's palm to the palm support plate.

[0010] The base has a protruding slide rail in the front-to-back direction at the center of the top. The bottom of the silicone arm support is connected to a snap-fit ​​seat. The snap-fit ​​seat snaps into the protruding slide rail and can slide back and forth along the protruding slide rail, so that the silicone arm support can move back and forth along the protruding slide rail to adjust its position.

[0011] The left side of the snap-fit ​​seat has a threaded hole and a first bolt installed thereon. Adjusting the tightness of the first bolt can fix the snap-fit ​​seat and the protruding slide rail.

[0012] An arc-shaped block is installed at the front end of the palm support plate. The arc-shaped block contacts the arc-shaped surface at the front end of the fan-shaped plate. When the palm support plate rotates on the fan-shaped plate, it drives the arc-shaped block to slide along the edge of the fan-shaped plate. A horizontal threaded hole is opened in the middle of the arc-shaped block and a second bolt is installed thereon. The end of the second bolt contacts the arc-shaped surface of the fan-shaped plate. The palm support plate and the fan-shaped plate can be fixed by adjusting the tightness of the second bolt.

[0013] Furthermore, the base has several slots on the left and right sides of the protruding track. The slots are the same as the outline of the support arm, so that the support arm can be engaged in the slot. By adjusting the position of the support arm, the position of the ball hinge guide joint can be adjusted, which is convenient to adapt to the guide positioning angle required by different situations, making the surgical operation more flexible.

[0014] The beneficial effects of this utility model are:

[0015] 1. Compared with the prior art, this utility model uses the combination design of ball hinge guide joint and split clamp to set a guide channel through the ball core inside the ball head. By rotating the ball hinge guide joint, the guide channel can be adjusted at multiple angles. The locking bolt of the split clamp is linked with the spring to provide elastic locking force after adjustment. This not only ensures the flexible adjustment of the guide angle, but also avoids the ball head wear or jamming caused by traditional rigid locking, thereby improving the accuracy of guide needle positioning and the reliability of intraoperative adjustment.

[0016] 2. The silicone arm support and palm support plate are hinged together by a fan-shaped plate to form an adjustable angle structure. When the arc-shaped block slides along the edge of the fan-shaped plate as the palm support plate rotates, it is pressed and fixed by the second bolt. With the adjustment of the ladder buckle of the arm strap and the palm strap, the wrist flexion angle can be adaptively adjusted, so that the fixed posture of the patient's arm and palm can be personalized according to the fracture type, which enhances the compatibility of the device with different anatomical morphologies.

[0017] 3. The base is equipped with a composite adjustment structure consisting of a protruding slide rail and multiple slots. When the locking seat moves the silicone arm support back and forth along the slide rail, it is positioned by the first bolt. The support arm can be positioned in different slots to change the mounting base of the ball hinge guide joint, forming a multi-dimensional spatial adjustment mechanism. This ensures that the guide positioning reference point and the patient's limb position are optimally matched, effectively improving the flexibility of surgical operations and the universality of the positioning device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments are briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the upper part of the structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the middle part of Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the middle part of Embodiment 1 of this utility model;

[0023] Figure 5 This is a cross-sectional schematic diagram of Embodiment 1 of this utility model.

[0024] The structural names represented by each number in the attached diagram are as follows:

[0025] 1-Base, 101-Protruding slide rail, 102-Slot, 2-Silicone arm support, 201-Arm strap, 202-Fan-shaped plate, 203-Snap-fit ​​seat, 204-First bolt, 205-Hinge hole, 3-Palm support plate, 301-Palm strap, 302-Arc-shaped block, 303-Second bolt, 4-Spherical hinge guide joint, 401-Support arm, 5-Split clamp, 501-Locking bolt, 502-Spring, 6-Guide pipe. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0027] Example 1

[0028] See Figures 1 to 5 As shown, and based on the contents of this specification, an auxiliary scaphoid fracture guiding and positioning nailing device is proposed, including a base 1. The base 1 is a flat plate made of medical-grade stainless steel. A silicone arm support 2 is installed at the center of the upper part of the base 1. The silicone arm support 2 is made of biocompatible silicone material. A semi-circular fan-shaped plate 202 is fixedly connected to the front end of the silicone arm support 2. The fan-shaped plate 202 is made of rigid plastic. A hinge hole 205 is vertically opened at its center and connected to the palm support plate 3 through a hinge shaft, so that the palm support plate 3 can be adjusted in angle relative to the silicone arm support 2 around the hinge hole 205. The palm support plate 3 is covered with a soft silicone layer to fit the patient's palm. It contacts the front arc surface of the fan-shaped plate 202 through the arc block 302 installed at its front end. When the palm support plate 3 rotates, the arc block 302 slides along the edge of the fan-shaped plate 202. A second bolt 303 is installed in the horizontal threaded hole in the middle of the arc block 302. By tightening the second bolt 303, the arc block 302 can be pressed and fixed on the arc surface of the fan-shaped plate 202, thereby locking the angle between the palm support plate 3 and the silicone arm support 2.

[0029] A ball joint guide section 4 is mounted on the left side of the base 1 via a support arm 401. The lower end of the support arm 401 is connected to several slots 102 on the left and right sides of the base 1 via a snap-fit ​​mechanism. The contour of the slots 102 matches the support arm 401. By adjusting the position of the support arm 401 in different slots 102, the lateral mounting base point of the ball joint guide section 4 can be changed. The ball head of the ball joint guide section 4 has a through hole penetrating the center of the ball. A guide tube 6 is embedded in the through hole. The guide tube 6 is made of medical-grade stainless steel, hollow inside and with a smooth inner wall, used to guide the precise insertion of guide needles or screws. A split clamp 5 is mounted above the ball joint seat of the ball joint guide section 4. The split clamp 5 is an open ring shape. Threaded holes are symmetrically opened on the left and right sides of its opening, and locking bolts 501 are fitted onto them. Springs 502 are sleeved around the locking bolts 501. The two ends of the springs 502 are connected to the left and right sides of the opening of the split clamp 5, respectively. When the ball joint guide section 4 rotates to the required angle, the split clamp 5 can be compressed by tightening the locking bolt 501 to clamp the ball head. The elastic restoring force of the spring 502 can prevent locking, ensuring that the ball head can be stably fixed and avoid excessive wear during adjustment.

[0030] An arm strap 201 is installed on the silicone arm support 2. The arm strap 201 is made of nylon and has a trapezoidal buckle. The toothed bar of the trapezoidal buckle engages with the limiting hole on the strap body, allowing for quick adjustment of the strap length to fit different patients' arm sizes. Two hand straps 301 are symmetrically installed on the palm support plate 3. Their structure is the same as the arm strap 201, used to fix the patient's palm and maintain the wrist flexion angle. A protruding slide rail 101 with a front-to-back direction is set in the center of the base 1. The protruding slide rail 101 is made of aluminum alloy. The locking seat 203 at the bottom of the silicone arm support 2 is slidably engaged with the protruding slide rail 101. The left side of the locking seat 203 has a threaded hole and a first bolt 204 is installed. By tightening the first bolt 204, the locking seat 203 can be fixed to the protruding slide rail 101, thereby adjusting the front-to-back position of the silicone arm support 2 to accommodate differences in patient limb length.

[0031] When using this device, first place the patient's arm on the silicone armrest 2, and adjust and fix it using the arm strap 201 and hand strap 301 to ensure that the arm and hand are in a natural flexed position. Depending on the fracture type and surgical requirements, loosen the first bolt 204, slide the silicone armrest 2 back and forth along the protruding slide rail 101 to the appropriate position, and then lock it. Next, adjust the position of the support arm 401 in the slot 102 of the base 1 to determine the lateral reference point of the ball hinge guide joint 4. Adjust the wrist flexion angle by rotating the palm support plate 3. The arc-shaped block 302 slides along the fan-shaped plate 202 to the target angle as the palm support plate 3 rotates, and then tighten the second bolt 303 for fixation. During guidance and positioning, loosen the locking bolt 501 of the split clamp 5, adjust the angle of the ball hinge guide joint 4 to align the guide tube 6 with the fracture site, tighten the locking bolt 501 to complete the locking, and then insert the guide pin or screw through the guide tube 6.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the protection scope of this utility model. For those skilled in the art, various modifications and variations can be made to the above embodiments without departing from the principle of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A device for guiding and positioning nail insertion in scaphoid fractures, characterized in that, The base (1) includes a silicone armrest (2) installed at the center of the top of the base (1). A semi-circular fan-shaped plate (202) is installed at the front end of the silicone armrest (2). A hinge hole (205) is vertically opened at the center of the fan-shaped plate (202) and a palm support plate (3) is hinged thereto, so that the angle between the palm support plate (3) and the silicone armrest (2) is adjustable. A ball hinge guide joint (4) is installed on the left side of the base (1) through a support arm (401). The ball head of the ball hinge guide joint (4) has a through hole that passes through the center of the ball and a guide pipe (6) is installed in the through hole. The guide pipe (6) is hollow inside and has a smooth inner wall. Rotating the ball hinge guide joint (4) can drive the guide pipe (6) to be flexibly adjusted in all directions.

2. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: A split clamp (5) is installed above the ball joint seat of the ball hinge guide joint (4). The split clamp (5) is an open ring and contacts the ball head of the ball hinge guide joint (4). The split clamp (5) has threaded holes symmetrically opened on the left and right sides of the opening and is fitted with locking bolts (501). The tightness of the locking bolts (501) can adjust the tightness of the split clamp (5) on the ball head.

3. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 2, characterized in that: A spring (502) is sleeved around the locking bolt (501), and the two ends of the spring (502) are respectively connected to the left and right sides of the opening of the split clamp (5).

4. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: The silicone armrest (2) is equipped with an arm strap (201), which has a ladder buckle and can be adjusted to fix the length.

5. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: The palm support plate (3) is equipped with a palm strap (301), which has a ladder buckle and can be adjusted to a fixed length.

6. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: The base (1) has a protruding slide rail (101) in the front-to-back direction at the center above. The silicone arm support (2) is connected to a snap-fit ​​seat (203) at the bottom. The snap-fit ​​seat (203) snaps onto the protruding slide rail (101) and can slide back and forth along the protruding slide rail (101).

7. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 6, characterized in that: The left side of the snap-fit ​​seat (203) has a threaded hole and is fitted with a first bolt (204).

8. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: An arc-shaped block (302) is installed at the front end of the palm support plate (3). The arc-shaped block (302) contacts the arc-shaped surface at the front end of the fan-shaped plate (202). When the palm support plate (3) rotates on the fan-shaped plate (202), it drives the arc-shaped block (302) to slide along the edge of the fan-shaped plate (202). A horizontal threaded hole is opened in the middle of the arc-shaped block (302) and a second bolt (303) is installed thereon.

9. The auxiliary scaphoid fracture guiding and positioning nailing device according to claim 1, characterized in that: The base (1) has several slots (102) on the left and right sides of the protruding track. The slots (102) have the same outline as the support arm (401), so that the support arm (401) can be engaged in the slots (102).

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