Palm and metatarsal bone extension support

Abstract

The invention discloses a palm and metatarsal bone extension support which comprises a first support body, a second support body, a sliding rail, a connecting rod and a sliding block, the sliding rail is arranged in an arc shape and arranged at one end of the first support body, and the sliding block is arranged in the sliding rail in a sliding mode and connected with the second support body through the connecting rod. Through the application of the invention, the palm and metatarsal bone extension bracket is provided, the position of the palm and metatarsal bone extension bracket can be flexibly adjusted along with the movement of metacarpophalangeal or metatarsophalangeal joints so as to ensure that the palm and metatarsal bone extension bracket can be always matched with the rotation center of the joints, so that the joint alignment and the movement track are accurately controlled, and the joint dislocation in the extension process of the traditional palm and metatarsal bone extension bracket is avoided; and stiffness caused by cross-joint absolute braking can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a metacarpophalangeal and metatarsophalangeal bone lengthening bracket. Background Art

[0002] The existing metacarpophalangeal and metatarsophalangeal bone bracket lengthening technology still has significant deficiencies, mainly reflected in that it is difficult for the bracket to accurately maintain the alignment relationship and movement function of the metacarpophalangeal or metatarsophalangeal joint. In the prior art, most metacarpophalangeal and metatarsophalangeal bone lengthening brackets cannot rotate coaxially with the corresponding joint. Even if the coaxial rotation of the bracket and the joint is achieved through a hinge, since it can only be placed on the side of the joint, it is difficult to be applicable to all metacarpophalangeal and metatarsophalangeal bones. During the metacarpophalangeal and metatarsophalangeal bone lengthening process, the soft tissue tension gradually increases, and the lack of protection for the metacarpophalangeal or metatarsophalangeal joint may lead to joint dislocation. At the same time, the absolute immobilization across the joint may lead to contracture and stiffness of the corresponding joint, affecting the appearance and functional recovery of the affected limb after surgery. Summary of the Invention

[0003] In view of this, to solve the above problems, the object of the present invention is to provide a metacarpophalangeal and metatarsophalangeal bone lengthening bracket, comprising: a first bracket, a second bracket, a slide rail, a connecting rod, and a slider. The slide rail is arc-shaped, the slide rail is arranged at one end of the first bracket, the slider is slidably arranged inside the slide rail, and the slider is connected to the second bracket through the connecting rod.

[0004] In another preferred embodiment, a threaded hole is opened at the upper end of the slider.

[0005] In another preferred embodiment, the first bracket comprises: a first bracket body, a first fixing nail clip, and a first adjusting nail clip. The slide rail is connected to one end of the first bracket body, both the first fixing nail clip and the first adjusting nail clip are arranged on one side of the first bracket body, and the first fixing nail clip is closer to the slide rail than the first adjusting nail clip.

[0006] In another preferred embodiment, the first bracket further comprises: a first adjusting nut, the first adjusting nut is arranged at the other end of the first bracket body, and the first adjusting nut is connected to the first adjusting nail clip.

[0007] In another preferred embodiment, the first bracket further comprises: a first lead screw, the first lead screw is arranged inside the first bracket body, one end of the first lead screw passes through the first bracket body and is connected to the first adjusting nut, the first lead screw is rotatably connected to the first adjusting nail clip, and the first lead screw can move inside the first bracket body.

[0008] In another preferred embodiment, the second bracket includes: a second bracket body, a second adjusting staple, a second adjusting nut, and a second lead screw. The second adjusting staple is disposed on one side of the second bracket body. One end of the second bracket body is provided with the second adjusting nut. The second lead screw is disposed inside the second bracket body. One end of the second lead screw passes through the second bracket body and is connected to the second adjusting nut. The second lead screw is connected to the second adjusting staple. The second lead screw is movable inside the second bracket body. The connecting rod is connected to the second adjusting staple.

[0009] In another preferred embodiment, the first fixing staple, the first adjusting staple, and the second adjusting staple each include: a first plate body, a second plate body, and an adjusting screw. The first plate body and the second plate body are both connected to the adjusting screw. The second plate body is movable along the adjusting screw.

[0010] Due to the adoption of the above technical solutions, the present invention has the following positive effects compared with the prior art: By applying the present invention, a metacarpophalangeal and metatarsophalangeal bone lengthening bracket is provided, which can flexibly adjust its position with the movement of the metacarpophalangeal or metatarsophalangeal joint to ensure that it can always match the rotation center of the finger, thereby precisely controlling the joint alignment and movement trajectory, avoiding surgical complications such as joint dislocation or stiffness caused by traditional metacarpophalangeal and metatarsophalangeal bone lengthening brackets, and being beneficial to improving the appearance and functional recovery of the affected limb after surgery; In addition, this bracket technology is also applicable to the treatment of severe fracture dislocations around the metacarpophalangeal and metatarsophalangeal joints, and simultaneously realizes the reduction and fixation of the fracture dislocation and the early rehabilitation of the joint function through the design of the arc-shaped slide rail and the lockable slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of a metacarpophalangeal and metatarsophalangeal bone lengthening bracket of the present invention;

[0012] Figure 2 is a top view of a metacarpophalangeal and metatarsophalangeal bone lengthening bracket of the present invention;

[0013] Figure 3 is a schematic structural diagram of a slider of a metacarpophalangeal and metatarsophalangeal bone lengthening bracket of the present invention.

[0014] In the drawings:

[0015] 1, first bracket; 2, second bracket; 3, slide rail; 4, connecting rod; 5, slider; 11, first bracket body; 12, first fixing staple; 13, first adjusting staple; 14, first adjusting nut; 21, second bracket body; 22, second adjusting staple; 23, second adjusting nut; 51, threaded hole; 61, fixing hole; 62, fixing screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", "vertical", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0018] It should be particularly noted that the "horizontal" and "vertical" in the present invention are used to illustrate the approximate positional relationship, rather than the strict "horizontal plane" or "vertical plane".

[0019] As Figures 1-3 shown, a metacarpal and metatarsal bone lengthening bracket of a preferred embodiment is shown, including: a first bracket 1, a second bracket 2, a slide rail 3, a connecting rod 4, and a slider 5. The slide rail 3 is arranged in an arc shape, the slide rail 3 is arranged at one end of the first bracket 1, the slider 5 is slidably arranged inside the slide rail 3, and the slider 5 is connected to the second bracket 2 through the connecting rod 4.

[0020] Further, as a preferred embodiment, a threaded hole 51 is opened at the upper end of the slider 5. Further, as shown in Figure 3 shown, a fixing screw 62 can be arranged in the threaded hole 51. When the present invention is applied to a fracture patient, by arranging the fixing screw 62, the slider 5 can be locked at a certain position inside the slide rail 3 to prevent the slider 5 from continuing to slide inside the slide rail 3 and causing secondary injury to the patient.

[0021] Further, as a preferred embodiment, the first bracket 1 includes: a first bracket body 11, a first fixing nail clip 12, and a first adjusting nail clip 13. The slide rail 3 is connected to one end of the first bracket body 11. Both the first fixing nail clip 12 and the first adjusting nail clip 13 are arranged on one side of the first bracket body 11, and the first fixing nail clip 12 is closer to the slide rail 3 than the first adjusting nail clip 13. Further, the first fixing nail clip 12 and the first adjusting nail clip 13 are connected to the metacarpal bone of the patient through half nails.

[0022] Further, as a preferred embodiment, the first bracket 1 further includes: a first adjusting nut 14. The first adjusting nut 14 is arranged at the other end of the first bracket body 11, and the first adjusting nut 14 is connected to the first adjusting nail clip 13.

[0023] Further, as a preferred embodiment, the first bracket 1 further includes: a first lead screw disposed inside the first bracket body 11. One end of the first lead screw passes through the first bracket body 11 and is connected to the first adjusting nut 14. The first lead screw is rotatably connected to the first adjusting nail clip 13, and the first lead screw can move inside the first bracket body 11. Further, the first lead screw and the first adjusting nail clip 13 are rotatably connected through a movable joint. The structure of the movable joint may include a fixed sleeve. One end of the fixed sleeve is fixedly connected to the first adjusting nail clip 13. A limiting ring is provided inside the other end of the fixed sleeve. A rotating ring is provided inside the fixed sleeve. The first lead screw passes through the limiting ring and is connected to the rotating ring. The rotating ring can be restricted within the fixed sleeve by the setting of the limiting ring. The rotating ring can rotate within the fixed sleeve but will not move axially.

[0024] Further, as a preferred embodiment, internal threads are provided inside the first bracket body 11. The first lead screw can cooperate with the internal threads of the first bracket body 11 to realize the movement of the first lead screw inside the first bracket body 11. A chute is provided on one side of the first bracket body 11. The first adjusting nail clip 13 extends into the chute and is connected to the first lead screw through a movable joint. Further, by screwing the first adjusting nut 14, the first lead screw can move inside the first bracket body 11 and drive the first adjusting nail clip 13 to move along the first bracket body 11. For every one turn of the first adjusting nut 14, the first adjusting nail clip 13 can advance or retreat a certain distance along the first bracket body 11. Since the first adjusting nail clip 13 is connected to the metacarpal bone of the patient, when the first adjusting nail clip 13 advances along the first bracket body 11, that is, when the first adjusting nail clip 13 moves in a direction away from the first fixed nail clip 12, the metacarpal bone of the patient can be stretched under the action of the first adjusting nail clip 13. Over time, the metacarpal bone of the patient can be lengthened.

[0025] Further, as a preferred embodiment, the second bracket 2 includes: a second bracket body 21, a second adjusting nail clip 22, a second adjusting nut 23, and a second lead screw. The second adjusting nail clip 22 is disposed on one side of the second bracket body 21. A second adjusting nut 23 is provided at one end of the second bracket body 21. The second lead screw is disposed inside the second bracket body 21. One end of the second lead screw passes through the second bracket body 21 and is connected to the second adjusting nut 23. The second lead screw is connected to the second adjusting nail clip 22. The second lead screw can move inside the second bracket body 21. The connecting rod 4 is connected to the second adjusting nail clip 22. Further, the second lead screw can also be connected to the second adjusting nail clip 22 through a movable joint. A chute is also provided on the second bracket body 21 to facilitate the movement of the second adjusting nail clip 22. For every one turn of the second adjusting nut 23, the second adjusting nail clip 22 can advance or retreat a certain distance along the second bracket body 21.

[0026] Further, as a preferred embodiment, an internal thread is provided inside the second bracket body 21, and the second lead screw can cooperate with the internal thread of the second bracket body 21, so as to realize the movement of the second lead screw inside the second bracket body 21.

[0027] Further, as a preferred embodiment, the first fixing staple 12, the first adjusting staple 13 and the second adjusting staple 22 all include: a first plate body, a second plate body and an adjusting screw. The first plate body and the second plate body are both connected to the adjusting screw. The first plate body is connected to the first bracket body 11 or the second bracket body 21, and the second plate body can move along the adjusting screw. Further, by screwing the adjusting screw, the distance between the first plate body and the second plate body can be adjusted, which is beneficial to conveniently arrange a half staple between the first plate body and the second plate body and fix the position of the half staple to prevent the half staple from moving, thereby affecting the surgical effect of the patient.

[0028] Further, as a preferred embodiment, a fixing hole 61 is provided between the first plate body and the second plate body. Further, when it is necessary to fix the first fixing staple 12, the first adjusting staple 13 or the second adjusting staple 22 to the metacarpal bone, a half staple can be arranged in the corresponding fixing hole 61 and the half staple is connected to the metacarpal bone. Wherein, the first plate body is in threaded cooperation with the adjusting screw, and the second plate body is not in threaded connection with the adjusting screw. By tightening the adjusting screw, the head of the adjusting screw will squeeze the second plate body, so that the first plate body contacts the second plate body. By loosening the adjusting screw, at this time the head of the adjusting screw does not squeeze the second plate body, and the distance between the second plate body and the first plate body can be manually adjusted to facilitate the installation of half staples with different outer diameters.

[0029] The working principle of the present invention is specifically as follows: First, connect the first adjusting staple 13 to the metacarpal bone of the patient through a half staple, and then adjust the positions of the slide rail 3 and the second bracket 2 on the palm of the patient. The trajectory of the slider 5 moving along the slide rail 3 is an arc, and the center of the arc coincides with the rotation center of the metacarpophalangeal joint of the patient. After the position adjustment is completed, connect the first fixing staple 12 to the metacarpal bone of the patient through a half staple, connect the second adjusting staple 22 to the phalanx of the patient through a half staple, and then perform an osteotomy operation on the patient. After the osteotomy operation is completed, the position of the first adjusting staple 13 on the first bracket body 11 can be adjusted to gradually lengthen the metacarpal bone of the patient.

[0030] In another embodiment of the present invention, the present invention can also be used to lengthen the metatarsal bones of a patient. Further, the first adjusting nail clip 13 is connected to the metatarsal bone of the patient through a half nail, and then the positions of the sliding rail 3 and the second bracket 2 on the patient's foot are adjusted. The trajectory of the slider 5 moving along the sliding rail 3 is an arc, and the center of the arc coincides with the rotation center of the patient's toe joint. After the position adjustment is completed, the first fixing nail clip 12 is connected to the metatarsal bone of the patient through a half nail, and the second adjusting nail clip 22 is connected to the phalanx bone of the patient through a half nail. Then, osteotomy operation is performed on the patient. After the osteotomy operation is completed, the length of the patient's metatarsal bone can be gradually increased by adjusting the position of the first adjusting nail clip 13 on the first bracket body 11.

[0031] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A metacarpal and metatarsal bone lengthening bracket, characterized in that, Comprising: A first bracket, a second bracket, a slide rail, a connecting rod and a slider, wherein the slide rail is arc-shaped, the slide rail is arranged at one end of the first bracket, the slider is slidably arranged inside the slide rail, and the slider is connected to the second bracket through the connecting rod.

2. The metacarpal and metatarsal bone lengthening bracket according to claim 1, characterized in that, A threaded hole is formed in the upper end of the slider.

3. The palmar and metatarsal bone lengthening bracket according to claim 1, characterized in that, The first bracket includes: a first bracket body, a first fixing clip and a first adjusting clip. The slide rail is connected to one end of the first bracket body. The first fixing clip and the first adjusting clip are both arranged on one side of the first bracket body, and the first fixing clip is closer to the slide rail than the first adjusting clip.

4. The palmar and metatarsal bone lengthening bracket according to claim 3, characterized in that, The first bracket further includes: a first adjusting nut, which is arranged at the other end of the first bracket body and is connected to the first adjusting clip.

5. The palmar and metatarsal bone lengthening bracket according to claim 4, wherein The first bracket further includes: a first lead screw, which is arranged inside the first bracket body. One end of the first lead screw passes through the first bracket body and is connected to the first adjusting nut. The first lead screw is rotatably connected to the first adjusting clip and can move inside the first bracket body.

6. The metacarpal and metatarsal bone lengthening bracket according to claim 3, wherein, The second bracket includes: a second bracket body, a second adjusting clip, a second adjusting nut and a second lead screw. The second adjusting clip is arranged on one side of the second bracket body. A second adjusting nut is arranged at one end of the second bracket body. The second lead screw is arranged inside the second bracket body. One end of the second lead screw passes through the second bracket body and is connected to the second adjusting nut. The second lead screw is connected to the second adjusting clip and can move inside the second bracket body. The connecting rod is connected to the second adjusting clip.

7. The metacarpophalangeal and metatarsophalangeal bone lengthening bracket according to claim 6, wherein The first fixing clip, the first adjusting clip and the second adjusting clip all include: a first plate body, a second plate body and an adjusting screw. The first plate body and the second plate body are both connected to the adjusting screw, and the second plate body can move along the adjusting screw.

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