Bone hammer-shaped finger clamp

Abstract

The utility model provides a bony hammer-shaped finger clamp which comprises a joint bearing assembly and a pressure applying assembly, the pressure applying assembly is rotatably arranged on one side of the upper portion of the joint bearing assembly, the joint bearing assembly is used for placing a finger, and one end of the pressure applying assembly abuts against a fracture block. The device is simple in structure, convenient to manufacture and low in cost. The bone block fixing needle is utilized to pressurize a reset fracture block and maintain normal alignment, so that the operation difficulty can be reduced, the risk that the bone block is broken due to internal fixation is reduced, the success rate of one-time reset fixation is improved, the operation time is shortened, and the dependence on the skill and experience of an operator is reduced; and meanwhile, the soft joint supporting bracket can maintain the straightening position fixation of the distal interphalangeal joint under the condition of not damaging skin soft tissues, so that the joint surface injury caused by the use of a kirschner wire for threading and fixing is avoided, and the later joint function exercise is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a bony hammer-shaped finger clamp. Background Technology

[0002] Bony mallet finger (avulsion fracture of the dorsal base of the distal phalanx) can affect the shape and function of the finger if not properly treated. It is a common case in hand surgery. Open reduction and fixation with Kirschner wires / blocking, or fixation with wires brought out from the fingertip and insertion point reconstruction are the commonly used treatment methods. However, this traditional reduction and fixation method has certain difficulties:

[0003] 1. If the avulsed bone fragments are small, they are prone to fracture when needled directly.

[0004] 2. Using Kirschner wires to block bone fragments is difficult to operate due to the small insertion angle of the Kirschner wires, which requires a high level of skill and experience from the operator.

[0005] 3. The fracture was caused by the avulsion of the extensor tendon insertion point. The external contour of the bone fragment has a large curvature. The fracture line has angles with the horizontal plane, frontal plane and sagittal plane of the phalanx. When using the method of fixing the insertion point with a wire pulled out from the fingertip, it is difficult to grasp the position of the wire on the surface of the bone fragment and to find the correct angle for pulling out and fixing the wire. This can easily cause the bone fragment to flip or misalign.

[0006] 4. Using the fingertip to guide the steel wire for fixation and reconstruction requires applying pressure to the fingertip for fixation, which can easily lead to skin necrosis due to prolonged pressure. The process of threading the wire can also cause damage to soft tissues such as nerves and blood vessels.

[0007] 5. During the procedure, Kirschner wires are needed to fix the distal interphalangeal joint, which damages the integrity of the joint surface and can easily lead to postoperative joint stiffness.

[0008] 6. Traditional surgical procedures require a high level of experience and skill from the surgeon, have a low success rate on the first attempt, and can lead to surgeon fatigue due to prolonged operation time. Repeated needle insertion can result in bone fragments, loosening of fixation, and other consequences. Repeated fluoroscopy during the operation can increase the damage of X-rays to both the doctor and the patient. Utility Model Content

[0009] In view of this, the present invention aims to propose a bony hammer-shaped finger clamp to solve the problems of existing reduction and fixation methods that are prone to bone fragment fracture, bone fragment rotation and misalignment, soft tissue damage such as nerves and blood vessels, postoperative joint stiffness, high requirements for the surgeon's experience and skill level, low success rate on the first attempt, and increased damage to both doctors and patients from repeated fluoroscopy during the operation.

[0010] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0011] A bony hammer-shaped finger clamp includes a joint support assembly and a pressure application assembly. The pressure application assembly is rotatably disposed on one side above the joint support assembly. The joint support assembly is used to place the finger, and one end of the pressure application assembly abuts against the fracture fragment.

[0012] The joint support assembly is made of a transparent material.

[0013] Furthermore, the joint support assembly includes a joint support bracket, a fixing strap, an arc-shaped portion, and a first mounting plate. The two ends of the fixing strap are located on the bottom side of the joint support bracket, and the middle part of the fixing strap is located above the joint support bracket.

[0014] The arc-shaped part is located at the end of the joint support away from the fixing belt, and the two sides above the arc-shaped part are provided with first mounting plates, and the first mounting plates are provided with first through holes.

[0015] Furthermore, the inner sides of both ends of the fixing strap are provided with hook and loop fasteners, and the bottom of the joint support bracket is provided with hook and loop fasteners corresponding to the hook and loop fasteners.

[0016] Furthermore, the joint support and the curved portion are provided with a soft pad.

[0017] The joint support is used to fix the distal interphalangeal joint, and its length extends from the distal end to the fingertip and from the proximal end to the proximal interphalangeal joint.

[0018] The fixation strap can fix the joint support to the palmar side of the finger, thereby fixing the distal interphalangeal joint in an extended position to counteract the pressure of the bone fragment fixation target on the fracture fragment and thus maintain the alignment of the fracture. Furthermore, the fixation strap and the joint support are connected by Velcro, and the tightness can be adjusted according to different finger sizes.

[0019] To facilitate suturing, the fixation band can be temporarily opened, and an assistant can hold the joint support to keep the joint straight. After suturing, a small piece of gauze or cotton ball is applied to protect the incision, and then the fixation band is tightened.

[0020] The curved part is designed to better fit the shape of the fingertips, and the soft padding increases finger comfort and maintains the distal interphalangeal joint in an extended position without damaging the skin and soft tissue.

[0021] When changing dressings after surgery, it is not necessary to remove the clamps. Simply use tweezers to remove the small piece of gauze or cotton ball, disinfect, and then continue to apply a new small piece of gauze or cotton ball.

[0022] Furthermore, the pressure application assembly includes a bone block fixing pin, a fixing pin bolt, a pin handle, and a second mounting plate. The bone block fixing pin is a solid structure, with one end of the bone block fixing pin being needle-shaped. The end of the bone block fixing pin away from the needle shape is set at one end of the pin handle by the fixing pin bolt. The second mounting plate is set below the other end of the pin handle, and the second mounting plate is provided with a second through hole corresponding to the first through hole.

[0023] The needle handle, the second mounting plate, and the fixing needle bolt are made of transparent material.

[0024] The diameter of the bone fixation pin is 1-1.2 mm.

[0025] The fixing pin bolt is a flat-head bolt.

[0026] Furthermore, a clamping shaft is provided in the first and second through holes, and the needle handle is rotatably mounted on the clamping shaft via the second mounting plate.

[0027] Furthermore, the end of the needle handle away from the second mounting plate is provided with a through groove, and the bone block fixing needle is disposed in the through groove;

[0028] A threaded hole is provided on one side wall of the through groove, and the fixing pin bolt is set in the threaded hole. The end of the fixing pin bolt abuts against the side wall of the bone block fixing pin.

[0029] The bone fixation pin can move within the through groove, and the extension length and angle of the bone fixation pin can be adjusted to apply external pressure to the bone surface perpendicular to the fracture line to achieve the best fixation effect. The bone fixation pin can also be tightened and fixed in the through groove using the fixation pin bolt.

[0030] Furthermore, the needle handle and the second mounting plate are lever structures with the joint support, and the needle handle and the second mounting plate open and close with the joint support through an elastic structure.

[0031] Preferably, the elastic structure is a torsion spring, which is sleeved on the clamp shaft.

[0032] The needle handle, the second mounting plate, and the joint support form a lever structure. The clamp shaft serves as the axis of the lever structure, and the opening and closing are achieved through a torsion spring. The bone fixation needle at the end of the needle handle is controlled by the needle handle and the torsion spring to perform fracture reduction and fixation.

[0033] Compared with the prior art, the bony hammer-shaped finger clamp of this utility model has the following advantages:

[0034] (1) The bony hammer-shaped finger clamp of this utility model has a simple structure, is easy to manufacture and has low cost. It can improve the reliability of repositioning and fixation, reduce the dependence on the surgeon's skills and experience, improve the success rate and shorten the operation time.

[0035] (2) The bony hammer-shaped finger clamp of this utility model uses pressure fixation instead of needle fixation and external fixation with a plate instead of Kirschner wire intra-articular fixation. While maintaining the reduction of the avulsed bone fragments, it can reduce iatrogenic damage to bones, joints and soft tissues, reduce the subjective pain of patients after surgery, and facilitate joint function exercises in the later stage.

[0036] (3) The bony hammer-shaped finger clamp described in this utility model can improve the success rate of a single operation, shorten the operation time, reduce the physical exertion of the surgeon, reduce the dependence on the surgeon's skills and experience, reduce the number of intraoperative fluoroscopy sessions, and reduce radiation damage to both doctors and patients. Attached Figure Description

[0037] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0038] Figure 1 This is a side view of the bony hammer-shaped finger clamp described in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the pressure application component and torsion spring of the bony hammer-shaped finger clamp described in this embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram illustrating the use of the bony hammer-shaped finger clamp described in this embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Fracture fragment; 2. Joint support bracket; 3. Fixation strap; 4. Arc-shaped part; 5. First mounting plate; 6. Bone fragment fixation pin; 7. Fixation pin bolt; 8. Pin handle; 9. Second mounting plate; 10. Clamp shaft; 11. Through groove; 12. Torsion spring. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] like Figures 1 to 3 As shown, a bony hammer-shaped finger clamp includes a joint support assembly and a pressure application assembly. The pressure application assembly is rotatably disposed on one side above the joint support assembly. The joint support assembly is used to place the finger, and one end of the pressure application assembly abuts against the fracture fragment 1.

[0048] The joint support assembly is made of a transparent material.

[0049] The joint support assembly includes a joint support bracket 2, a fixing strap 3, an arc-shaped part 4, and a first mounting plate 5. The two ends of the fixing strap 3 are located on the bottom side of the joint support bracket 2, and the middle part of the fixing strap 3 is located above the joint support bracket 2.

[0050] The arc-shaped part 4 is located at the end of the joint support bracket 2 away from the fixing belt 3. The two sides above the arc-shaped part 4 are provided with first mounting plates 5, and the first mounting plates 5 are provided with first through holes.

[0051] The inner sides of both ends of the fixing strap 3 are provided with hook and loop fasteners, and the bottom of the joint support bracket 2 is provided with hook and loop fasteners corresponding to the hook and loop fasteners.

[0052] The joint support 2 and the arc-shaped part 4 are provided with soft pads.

[0053] The joint support 2 is used to fix the distal interphalangeal joint. Its length extends from the distal end to the fingertip and from the proximal end to the proximal interphalangeal joint.

[0054] The fixation strap 3 can fix the joint support bracket 2 on the palmar side of the finger, thereby fixing the distal interphalangeal joint in an extended position to counteract the pressure of the bone fragment fixation pin 6 on the fracture fragment 1 and thus maintain the alignment of the fracture. Furthermore, the fixation strap 3 and the joint support bracket 2 are connected by a hook and loop fastener, which can be adjusted according to the different finger sizes.

[0055] For ease of suturing, the fixation band 3 can be temporarily opened, and an assistant can hold the joint support 2 to keep the joint straight. After suturing, a small piece of gauze or cotton ball is applied to protect the incision, and then the fixation band 3 is tightened.

[0056] The curved part 4 is designed to better fit the shape of the fingertip, and the soft padding can increase the comfort of the finger and maintain the extended position of the distal interphalangeal joint without damaging the skin and soft tissue.

[0057] When changing dressings after surgery, it is not necessary to remove the clamps. Simply use tweezers to remove the small piece of gauze or cotton ball, disinfect, and then continue to apply a new small piece of gauze or cotton ball.

[0058] The pressure application assembly includes a bone block fixing pin 6, a fixing pin bolt 7, a pin handle 8, and a second mounting plate 9. The bone block fixing pin 6 is a solid structure, and one end of the bone block fixing pin 6 is needle-shaped. The end of the bone block fixing pin 6 away from the needle shape is set at one end of the pin handle 8 through the fixing pin bolt 7. The second mounting plate 9 is set below the other end of the pin handle 8, and the second mounting plate 9 is provided with a second through hole corresponding to the first through hole.

[0059] The needle handle 8, the second mounting plate 9, and the fixing needle bolt 7 are made of transparent material.

[0060] The diameter of the bone fixation pin 6 is 1-1.2 mm.

[0061] The fixing pin bolt 7 is a flat-head bolt.

[0062] The first through hole and the second through hole are provided with a clamp shaft 10, and the needle handle 8 is rotatably mounted on the clamp shaft 10 through the second mounting plate 9.

[0063] The end of the needle handle 8 away from the second mounting plate 9 is provided with a through groove 11, and the bone block fixing needle 6 is disposed in the through groove 11.

[0064] A threaded hole is provided on one side wall of the through groove 11, and the fixing pin bolt 7 is set in the threaded hole. The end of the fixing pin bolt 7 abuts against the side wall of the bone block fixing pin 6.

[0065] The bone fixation pin 6 can move within the through groove 11, and the extension length and angle of the bone fixation pin 6 can be adjusted to apply external pressure to the bone surface of the fracture fragment 1 perpendicular to the fracture line in order to achieve the best fixation effect. The bone fixation pin 6 can be pressed and fixed within the through groove 11 using the fixation pin bolt 7.

[0066] The needle handle 8 and the second mounting plate 9 are lever structures with the joint support 2. The needle handle 8 and the second mounting plate 9 are opened and closed with the joint support 2 through the torsion spring 12.

[0067] The needle handle 8, the second mounting plate 9 and the joint support 2 form a lever structure. The clamp shaft 10 is the axis of the lever structure. The opening and closing are achieved by the torsion spring 12. The bone fixation needle 6 at the end of the needle handle 8 is controlled by the needle handle 8 and the torsion spring 12 to perform fracture reduction and fixation.

[0068] In practice, lift the needle handle 8 and the bone fixation needle 6, then place your finger on the joint support 2, loosen the needle handle 8, so that the bone fixation needle 6 presses on the fracture fragment 1, adjust the extension length and angle of the bone fixation needle 6, tighten the fixation needle bolt 7, and attach the fixation strap 3 to the joint support 2 using the hook and loop side of the Velcro.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bony hammer-shaped finger clamp, characterized in that: It includes a joint support assembly and a pressure application assembly. The joint support assembly includes a joint support bracket (2), a fixing strap (3), an arc-shaped part (4), and a first mounting plate (5). The two ends of the fixing strap (3) are located on the bottom side of the joint support bracket (2), and the middle part of the fixing strap (3) is located above the joint support bracket (2). The arc-shaped part (4) is located at one end of the joint support bracket (2) away from the fixing belt (3), and the two sides above the arc-shaped part (4) are provided with first mounting plates (5), and the first mounting plates (5) are provided with first through holes; The pressure application assembly includes a bone block fixing pin (6), a fixing pin bolt (7), a pin handle (8), and a second mounting plate (9). One end of the bone block fixing pin (6) is needle-shaped. The end of the bone block fixing pin (6) away from the needle shape is set at one end of the pin handle (8) through the fixing pin bolt (7). The second mounting plate (9) is set below the other end of the pin handle (8). The second mounting plate (9) is provided with a second through hole corresponding to the first through hole. The pressure application component is rotatably positioned on one side above the joint support component, which is used to place the finger, and one end of the pressure application component abuts against the fracture fragment (1).

2. The bony hammer-shaped finger clamp according to claim 1, characterized in that: The inner sides of both ends of the fixing strap (3) are provided with hook and loop fasteners, and the bottom of the joint support bracket (2) is provided with hook and loop fasteners that correspond to the hook and loop fasteners.

3. The bony hammer-shaped finger clamp according to claim 1, characterized in that: The joint support (2) and the arc-shaped part (4) are provided with soft pads.

4. The bony hammer-shaped finger clamp according to claim 1, characterized in that: The bone fixation pin (6) is a solid structure.

5. A bony hammer-shaped finger clamp according to claim 1, characterized in that: The first through hole and the second through hole are provided with a clamp shaft (10), and the needle handle (8) is rotatably mounted on the clamp shaft (10) through the second mounting plate (9).

6. The bony hammer-shaped finger clamp according to claim 1, characterized in that: The needle handle (8) has a through groove (11) at one end away from the second mounting plate (9), and the bone block fixing needle (6) is disposed in the through groove (11); A threaded hole is provided on one side wall of the through groove (11), and a fixing pin bolt (7) is set in the threaded hole. The end of the fixing pin bolt (7) abuts against the side wall of the bone block fixing pin (6).

7. The bony hammer-shaped finger clamp according to claim 1, characterized in that: The needle handle (8) and the second mounting plate (9) are lever structures with the joint support bracket (2). The needle handle (8) and the second mounting plate (9) are opened and closed with the joint support bracket (2) through an elastic structure.

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