Dynamic bone traction support

Abstract

The present invention relates to a dynamic bone traction support, comprising a main body, which is integrally formed, and the main body comprises an antagonistic part at the rear, a traction part at the middle, and a hook-shaped part at the front. The antagonistic part is convex and arranged in an arc shape. After the two bent parts at the lower end of the antagonistic part are bent backward, they are extended to the front horizontal direction to form a straight part. The traction part is arranged in a paper clip shape, one end of the traction part is connected with the straight part, and the other end is extended forward to connect with the rear end of the hook-shaped part. The hook-shaped part is arranged in an S shape, and the front end is a free end. The advantages of the present invention are: when traction is applied to the phalanges, only two parallel steel needles (one for the traction part and one for the antagonistic part) need to be inserted into the phalanges, and the steel needles of the antagonistic part need to pass through the rotation center of the phalangeal condyle, so as to facilitate the passive flexion and extension of the fingers after surgery without eccentric movement. And the antagonistic part and the phalanges are firmly held without relative rotation. The damage to the phalanges is small, and the difficulty of operation is also reduced.

Description

Technical Field

[0001] The invention relates to a dynamic bone traction bracket and belongs to the field of medical devices. Background Art

[0002] The treatment of intra-articular fractures of the interphalangeal joint is one of the clinical problems in hand surgery. The fracture fragments are often comminuted and involve the articular surface, combined with joint dislocation and stable structure damage. Intra-articular fractures of the phalanges are classified as follows: Type I is a stable fracture without displacement; Type II is a monocondylar fracture, an unstable fracture; Type III is a condylar fracture of the phalanges, other fractures of the phalanges, dorsal palmar or lateral base fractures.

[0003] Comminuted intra-articular fractures, especially those at the base of the middle phalanx, are called pilon fractures. These fractures are mostly caused by axial loads and are characterized by central collapse of the articular surface and extension of the fracture line toward the edge of the joint.

[0004] There are two methods for treating intra-articular fractures of the proximal interphalangeal joint: one emphasizes that anatomical reduction should be the treatment principle, advocating open reduction and internal fixation (traditional AO fracture treatment principles 1958); the other aims to achieve early functional training of the joint, uses external fixation to maintain traction on the damaged joint, and uses the principle of "capsular ligament reduction" to reduce the intra-articular fracture.

[0005] For intra-articular fractures of the interphalangeal joint, the traditional open reduction and internal fixation can maintain the stable reduction of the joint and fracture, but it is impossible to perform early joint movement. Due to the long-term fixation and immobilization of plaster and steel needles, the joint capsule and collateral ligaments contract, and the joint is stiff. In terms of the biomechanics of finger function, the flexion and extension function of the proximal interphalangeal joint is second only to the metacarpophalangeal joint. In order to reduce the degree of joint stiffness and contracture, early joint movement is required. However, the healing of fractures requires firm fixation of the joint, so there is a contradiction between the two. To solve this problem, we strive to find a device that can effectively maintain the reduction of fractures and joints and allow early exercise of the joints.

[0006] The dynamic bone traction technique described in "Grimm's Hand Surgery" requires inserting more steel needles into the phalanges during the traction operation, which causes great damage to the human body and is difficult to operate. In addition, the antagonistic steel needles at the condyle of the proximal distal phalanx cannot rotate with the flexion and extension of the fingers. If the fingers are flexed and extended forcefully, the steel needles may cut and rub the phalanges, causing complications such as needle tract infection and exudation. At the same time, the traction frame needs to be made on the surgical site, which requires a high level of operating ability from the operator. Summary of the invention

[0007] In order to overcome the defects of the prior art, the present invention provides a dynamic bone traction bracket, and the technical solution of the present invention is:

[0008] A dynamic bone traction support comprises a main body which is integrally formed. The main body comprises an antagonistic part at the rear, a traction part at the middle and a hook-shaped part at the front. The antagonistic part is convex and arranged in an arc shape. After the two bent parts at the lower end of the antagonistic part are bent backward, they are extended in the horizontal direction to form a straight part. The traction part is arranged in a paper clip shape. One end of the traction part is connected with the straight part, and the other end extends forward to connect with the rear end of the hook-shaped part. The hook-shaped part is arranged in an S shape, and the front end is a free end.

[0009] The main body is made of a medical Kirschner wire with a length of 25 cm and a diameter of 1.2 mm.

[0010] A method for using a dynamic bone traction support, characterized in that it comprises the following steps:

[0011] (1) First, buckle the antagonist part at the position of the condyle of the proximal phalanx, and then insert the first steel needle horizontally into the hole formed by the bending part;

[0012] (2) Then, a second steel needle parallel to the first one is driven into the middle of the sliding hole of the traction part;

[0013] (3) Take a sterile rubber glove and cut two rubber strips. Tie one end of the first rubber strip to one end of the second steel needle, and the other end of the first rubber strip to a hook-shaped part on the corresponding side. Tie one end of the second rubber strip to the other end of the second steel needle, and the other end of the second rubber strip to another hook-shaped part on the corresponding side. Adjust the tension through the two rubber strips.

[0014] The advantages of the present invention are: when traction is applied to the phalanges, only two parallel steel needles (one for the traction part and one for the antagonism part) need to be inserted into the phalanges, and the steel needle for the antagonism part needs to pass through the rotation center of the phalangeal condyle, so as to facilitate the passive flexion and extension of the fingers after surgery without eccentric movement. The antagonism part and the phalanges are firmly held without relative rotation. The damage to the phalanges is small, and the difficulty of operation is also reduced. It can be made before surgery according to the actual situation of the fracture injury mechanism and displacement, and can be brought to the operating table after high-temperature disinfection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are exemplary only and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the scope of protection of the present invention.

[0017] See also Figure 1 The present invention relates to a dynamic bone traction support, comprising a main body 1, which is integrally formed. The main body 1 includes an antagonistic portion 11 at the rear, a traction portion 12 in the middle, and a hook-shaped portion 13 at the front. The antagonistic portion 11 is convex and arranged in an arc shape. After the two bent portions 14 at the lower end of the antagonistic portion 11 are bent backward, they are extended to the front horizontal direction to form a straight portion 15. The traction portion 12 is arranged in a paper clip shape, one end of the traction portion 12 is connected to the straight portion 15, and the other end extends forward to connect with the rear end of the hook-shaped portion 13. The hook-shaped portion is arranged in an S shape, and the front end is a free end.

[0018] The main body 1 is made of a medical Kirschner wire with a length of 25 cm and a diameter of 1.2 mm.

[0019] The method of use of the present invention is as follows:

[0020] A method for using a dynamic bone traction support comprises the following steps:

[0021] (1) First, buckle the antagonist part at the position of the condyle of the proximal phalanx, and then insert the first steel needle horizontally into the hole formed by the bending part;

[0022] (2) Then, a second steel needle parallel to the first one is driven into the middle of the sliding hole of the traction part;

[0023] (3) Cut two rubber strips with sterile rubber gloves. Tie one end of the first rubber strip to one end of the second steel needle, and the other end of the first rubber strip to a hook on the corresponding side. Tie one end of the second rubber strip to the other end of the second steel needle, and the other end of the second rubber strip to another hook on the corresponding side. Adjust the tension through the two rubber strips. The steel needle of the antagonist part needs to pass through the rotation center of the phalangeal condyle to facilitate passive flexion and extension of the finger after surgery without eccentric movement. The antagonist arch and the phalanges should be firmly held without relative rotation.

Claims

1. A dynamic bone traction support, characterized in that: The invention comprises a main body, which is integrally formed and is made of a medical Kirschner wire with a length of 25 cm and a diameter of 1.2 mm. The main body comprises an antagonistic part at the rear, a traction part in the middle and a hook-shaped part at the front. The antagonistic part is convex and arranged in an arc shape. After the two bending parts at the lower end of the antagonistic part are bent backward, they are extended to the front horizontal direction to form a straight part. The antagonistic part is first buckled at the position of the condyle of the proximal phalanx, and then the first steel needle is horizontally driven into the hole formed by the bending part. The traction part is arranged in a paper clip shape, and one end of the traction part is connected to the proximal phalanx. The straight part is connected, and the other end extends forward to connect with the rear end of the hook part. The hook part is set in an S shape, and the front end is a free end. Then a second steel needle parallel to the first one is driven into the middle of the sliding hole of the traction part. Take sterile rubber gloves to cut two rubber strips. One end of the first rubber strip is tied to one end of the second steel needle, and the other end of the first rubber strip is tied to a hook-shaped part on the corresponding side. One end of the second rubber strip is tied to the other end of the second steel needle, and the other end of the second rubber strip is tied to the other hook-shaped part on the corresponding side, and the tension is adjusted through the two rubber strips.

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