A percutaneous reduction, distraction and compression fixation device for clavicle fracture

Abstract

The present invention discloses a percutaneous reduction, distraction and pressurization fixation device for clavicle fracture, comprising a reduction and fixation plate arranged on the body surface and adapted to the physiological curvature of the clavicle, an arc-shaped slide groove being provided in the reduction and fixation plate, a plurality of screw assemblies being connected in the arc-shaped slide groove, the screw assembly comprising a screw body and a locking nut, the screw body comprising an upper screw rod portion, a lower screw rod portion and a step portion located between the upper screw rod portion and the lower screw rod portion, the locking nut being adapted to be screwed on the upper screw rod portion and cooperating with the step portion to lock the screw body on the reduction and fixation plate, and a distraction and pressurization fine-tuning mechanism located outside the body and adjustable in length being connected between two adjacent screw assemblies near the fracture end. When the present invention is used, it only needs to make a few small incisions at both ends of the clavicle fracture and insert a few screw assemblies locked into the clavicle, so that minimally invasive surgery can be well achieved, and percutaneous external fixation on the body surface can reduce the stripping of the periosteum, protect blood supply, and reduce the occurrence of fracture nonunion.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a percutaneous reduction, distraction and pressure fixation device for clavicle fractures. Background Art

[0002] The clavicle is the first long tubular bone to ossify in the human body. During the development process, it forms two physiological curves, with the outer section convex to the back and the inner section convex to the front, shaped like a horizontal S lying in front of the top of the thorax. The outer 1 / 3 is flat (flatter in the front), and the inner 1 / 3 is approximately triangular (flatter on the top). The entire length is located under the skin, with the proximal end forming the sternoclavicular joint with the manubrium of the sternum, and the distal end forming the acromioclavicular joint with the acromion. It is the only bony structure connecting the shoulder girdle and the sternum. Clavicle fractures are common in adolescents and children, accounting for 5%-10% of all fractures in the body. Most of them are caused by indirect violence. It is common to fall sideways, land on the shoulder, and transmit the force to the clavicle, resulting in an oblique fracture. It can also be caused by landing on the hand or elbow, and the violence is transmitted to the clavicle through the shoulder, resulting in an oblique or transverse fracture.

[0003] At present, the treatment options for clavicle fractures include surgical treatment and conservative treatment. Surgical treatment includes open reduction, plate fixation, and intramedullary fixation system. There is no doubt that surgical treatment with plate fixation can restore the anatomical position of the clavicle to the greatest extent, improve early pain, and is conducive to early functional rehabilitation and later restoration of the clavicle appearance. However, surgical treatment still has serious intraoperative dissection, which destroys blood supply and affects the healing of the fracture ends in the later stage; irregular internal fixation operation affects the healing of the fracture ends and causes nonunion; the incision scar formed by open reduction affects the appearance; most patients consider the removal of internal fixation in the second stage, which increases the burden of social and economic pressure. Intraoperative closed reduction is difficult for intraoperative intramedullary fixation system, and it is often necessary to open the fracture end to reduce the fracture end, increase soft tissue stripping, and it is difficult to achieve absolute and strict minimally invasive. In addition, the clavicle intramedullary fixation system is not absolutely stable, and the probability of nonunion in the later stage is high. It is often used as an auxiliary means of plate fixation. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a percutaneous reduction, distraction and pressurization fixation device for clavicle fractures, which mainly solves the technical problem that the clavicle fracture reduction and fixation system in the prior art is difficult to implement minimally invasive surgery.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A percutaneous reduction, distraction and compression fixation device for clavicle fractures, comprising a reduction and fixation plate arranged on the body surface and adapted to the physiological curvature of the clavicle, wherein the reduction and fixation plate is provided with an arc-shaped slide groove arranged along the length direction and penetrating the upper and lower surfaces of the reduction and fixation plate, wherein a plurality of screw assemblies are connected in the arc-shaped slide groove, wherein the screw assembly comprises a screw body and a locking nut, wherein the screw body comprises an upper screw portion, a lower screw portion and a step portion located between the upper screw portion and the lower screw portion, wherein the upper screw portion of the screw body is configured to be able to be inserted from bottom to top in an adaptable manner The locking nut is adapted to be threaded on the upper screw portion and cooperates with the step portion to form a tight positioning structure to lock the screw body on the reduction and fixation plate. A length-adjustable distraction and pressure fine-tuning mechanism located outside the body is connected between two adjacent screw assemblies close to the fracture end. The two ends of the distraction and pressure fine-tuning mechanism are respectively movably connected to the two adjacent screw assemblies close to the fracture end, so that the distraction and pressure fine-tuning correction of the proximal and distal ends of the clavicle can be performed from outside the body through the distraction and pressure fine-tuning mechanism.

[0007] Furthermore, the expansion and pressurization fine-tuning mechanism includes a barrel and a telescopic rod portion telescopically sleeved and connected in the barrel, the telescopic rod portion is configured to be able to only telescope inward and outward relative to the axial direction of the barrel portion through the anti-rotation limitation of the anti-rotation limiting structure, a first sleeve portion is provided on the outer end of the telescopic rod portion, a sleeve hole is provided on the first sleeve portion that can be adapted to be sleeved on the upper end of the upper screw portion of one of the screw bodies in two adjacent screw assemblies close to the fracture end, and the first sleeve portion is fastened and locked together with the upper end of the upper screw portion by a first locking screw locked into the upper end of the upper screw portion, and a second sleeve portion is provided on the outer end of the barrel portion away from the first sleeve portion The second sleeve portion is provided with a sleeve hole that can be adapted to be fitted on the upper end of the upper screw portion of the other screw body, and the second sleeve portion is fastened and locked together with the upper end of the other upper screw portion by a second locking screw that is locked into the upper end of the other screw body. The telescopic rod portion is provided with an external threaded portion, and the barrel portion is movably connected with an adjusting knob that can rotate axially relative to the barrel portion, and the adjusting knob is provided with an internal threaded portion that matches the external threaded portion on the telescopic rod portion. The adjusting knob is connected together through the matching threads of the internal threaded portion and the external threaded portion, so that the telescopic rod portion can be driven to telescope relative to the barrel portion inside and outside to adjust the length by rotating the adjusting knob.

[0008] Furthermore, a limiting long groove arranged along the length direction is opened on the peripheral wall of the cylinder, and a limiting pin connected to the inner end of the telescopic rod is arranged in the limiting long groove, and an anti-rotation limiting structure is formed by the cooperation of the limiting pin and the limiting long groove.

[0009] Furthermore, a scale ruler is arranged on the peripheral wall of the cylinder portion, which can cooperate with the limit pin to form a length adjustment reading indication structure.

[0010] Furthermore, the adjusting knob is adapted to be fitted on the inner end of the barrel away from the second sleeve portion, and an annular groove is provided on the inner end of the barrel. The adjusting knob is connected to a fixing pin corresponding to the annular groove, and the adjusting knob is connected to the barrel through the positioning cooperation between the fixing pin and the annular groove.

[0011] Furthermore, the screw body is a hollow nail structure.

[0012] Furthermore, a connecting rib portion for reinforcement is provided at the middle position of the reset fixing plate, and the arc-shaped slide groove is separated by the connecting rib portion to form a symmetrical two-section structure.

[0013] Furthermore, two sets of screw assemblies are respectively arranged in each section of the arc-shaped slide groove.

[0014] Furthermore, the upper screw portion of the screw body is provided with two anti-rotation limit surfaces which are arranged opposite to each other and enable the screw body to only slide laterally in the arc-shaped sliding groove but cannot rotate on its own.

[0015] Furthermore, first anti-slip teeth are provided on the upper surface and / or the lower surface of the resetting and fixing plate.

[0016] Furthermore, a second anti-slip tooth is provided on the step portion of the screw body.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] In the percutaneous reduction, distraction and pressurization fixation device for clavicle fracture described in the present invention, the outer shape of the reduction and fixation plate is adapted to the physiological curvature of the clavicle, so as to realize the anatomical reduction of the clavicle and avoid the loss of reduction caused by axial rotation after reduction. At the same time, a plurality of screw assemblies that can be locked into the clavicle are arranged in the arc-shaped slide groove of the reduction and fixation plate, the lower part of each screw assembly is locked into the clavicle, and the upper part forms a tight positioning structure through the cooperation of the locking nut and the step portion to lock the screw body on the reduction and fixation plate, and a distraction and pressurization fine-tuning mechanism with adjustable length and located outside the body is connected between two adjacent screw assemblies close to the fracture end. Therefore, when in use, it is only necessary to fix the screw assembly at the clavicle fracture. A few small incisions are made at each end, and a few screw assemblies are inserted to lock into the clavicle, which can well achieve minimally invasive surgery. Percutaneous external fixation can reduce the stripping of the periosteum, protect blood supply, and reduce the occurrence of fracture nonunion. The reduction of the clavicle fracture end can be achieved by pulling and reducing the front and back and upper and lower positions of the fracture end through two adjacent screw assemblies close to the fracture end in conjunction with the distraction and pressure fine-tuning mechanism connected outside the body, so as to achieve distraction and pressure at the distal and proximal positions of the clavicle, thereby achieving the effect of near-anatomical reduction of the fracture end without cutting the fracture end, reducing patient pain, reducing soft tissue stripping, reducing the incidence of malformation, improving surgical scars, and reducing the incidence of bone nonunion. In addition, the way in which the reduction and fixation plate and the distraction and pressure fine-tuning mechanism are set outside the body makes it only necessary to remove the screw assemblies in the outpatient clinic in the later stage, eliminating the need for secondary removal of the internal fixation plate, which is conducive to reducing the patient's surgical pain and economic burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure from another angle of an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure decomposition of the screw assembly and the resetting and fixing plate according to an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure decomposition of the expansion and pressurizing fine-tuning mechanism according to an embodiment of the present invention.

[0023] Figure 5 It is a structural cross-sectional view of an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the coordination state between the embodiment of the present invention and the reset insert.

[0025] Description of labels:

[0026] 1. reset fixing plate, 2. screw assembly, 3. spread pressurized fine-adjusting mechanism, 4. reset clamp, 11. arc-shaped slide groove, 12. connecting rib, 13. first anti-slip tooth, 21. screw body, 22. locking nut, 31. barrel, 32. telescopic rod, 33. first locking screw, 34. second locking screw, 35. adjusting knob, 36. limit pin, 211. upper screw portion, 212. lower screw portion, 213. step portion, 311. second sleeve portion, 312. limit long groove, 313. scale ruler, 314. annular groove, 321. first sleeve portion, 322. external thread portion, 351. internal thread portion, 352. fixing pin, 2111. anti-rotation limit surface, 2131. second anti-slip tooth. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Please refer to the attached Figure 1 To Attachment Figure 6An embodiment of the present invention provides a percutaneous reduction, distraction and compression fixation device for clavicle fracture, comprising a reduction and fixation plate 1 arranged on the body surface and adapted to the physiological curvature of the clavicle, wherein the reduction and fixation plate 1 is provided with an arc-shaped slide groove 11 arranged along the length direction and penetrating the upper and lower surfaces of the reduction and fixation plate 1, wherein a plurality of screw assemblies 2 are connected in the arc-shaped slide groove 11, wherein the screw assembly 2 comprises a screw body 21 and a locking nut 22, wherein the screw body 21 comprises an upper screw portion 211, a lower screw portion 212 and a step portion 213 located between the upper screw portion 211 and the lower screw portion 212, wherein the upper screw portion 211 of the screw body 21 is provided with a locking nut 22, wherein the locking nut 22 comprises ... It is configured to be able to adaptably insert into the arc-shaped slide groove 11 from bottom to top and slide laterally along the arc-shaped slide groove 11. The locking nut 22 is adapted to be screwed on the upper screw rod portion 211 and cooperates with the step portion 213 to form a tight positioning structure to lock the screw body 21 on the reduction and fixation plate 1. A length-adjustable distraction and pressure fine-tuning mechanism 3 located outside the body is connected between two adjacent screw assemblies 2 near the fracture end. The two ends of the distraction and pressure fine-tuning mechanism 3 are respectively movably connected to the two adjacent screw assemblies 2 near the fracture end, so that the distraction and pressure fine-tuning correction of the proximal and distal ends of the clavicle can be performed from outside the body through the distraction and pressure fine-tuning mechanism 3. It can be understood that, in this embodiment, the shape of the reduction and fixation plate 1 is adapted to the physiological curvature of the clavicle, so as to realize the anatomical reduction of the clavicle and avoid the loss of reduction caused by axial rotation after reduction. At the same time, a plurality of screw assemblies 2 that can be locked into the clavicle are arranged in the arc-shaped slide groove 11 of the reduction and fixation plate 1. The lower part of each screw assembly 2 is locked into the clavicle, and the upper part cooperates with the locking nut 22 and the step portion 213 to form a tight positioning structure to lock the screw body 21 on the reduction and fixation plate 1, and a length-adjustable and externally-located expansion and pressure fine-tuning mechanism 3 is connected between two adjacent screw assemblies 2 near the fracture end. Therefore, when in use, it is only necessary to tighten the screw assembly 2 at the clavicle bone. A few small incisions are made at both ends of the fracture, and a few screw assemblies 2 are inserted to lock into the clavicle, so that minimally invasive surgery can be well achieved, and percutaneous external fixation can reduce the stripping of the periosteum, protect blood supply, and reduce the occurrence of fracture nonunion; the reduction of the fracture end of the clavicle can be achieved by two adjacent screw assemblies 2 near the fracture end in cooperation with the externally connected expansion and pressure fine-tuning mechanism 3 to pull and reset the front and back and upper and lower positions of the fracture end, so as to achieve the expansion and pressure of the distal and proximal positions of the clavicle, thereby achieving the effect of near-anatomical reduction of the fracture end without cutting the fracture end, reducing the patient's pain, reducing soft tissue stripping, reducing the incidence of malformation, improving surgical scars, and reducing the incidence of bone nonunion. In addition, the way in which the reduction and fixation plate 1 and the expansion and pressure fine-tuning mechanism 3 are set in vitro makes it only necessary to remove each screw assembly 2 in the outpatient clinic in the later stage, eliminating the need to remove the internal fixation plate twice, which is conducive to reducing the patient's surgical pain and economic burden.

[0030] Please refer to the attached Figure 1 To Attachment Figure 5In one preferred embodiment, the expansion and pressurizing fine-tuning mechanism 3 includes a barrel 31 and a telescopic rod 32 which is telescopically sleeved and connected in the barrel 31. The telescopic rod 32 is configured to be able to only axially extend and retract relative to the barrel 31 inward and outward through the anti-rotation restriction of the anti-rotation limiting structure. A first sleeve connection portion 321 is provided on the outer end of the telescopic rod 32. The first sleeve connection portion 321 is provided with a sleeve connection hole which can be adapted to be sleeved on the upper end of the upper screw portion 211 of one of the screw bodies 21 of two adjacent screw assemblies 2 near the fracture end. The first sleeve connection portion 321 is fastened and locked together with the upper end of the upper screw portion 211 by a first locking screw 33 which is locked into the upper end of the upper screw portion 211. A second sleeve connection portion 311 is provided on the outer end of the barrel 31 away from the first sleeve connection portion 321. The second sleeve portion 311 is provided with a sleeve hole that can be adapted to be sleeved on the upper end of the upper screw portion 211 of the other screw body 21, and the second sleeve portion 311 is fastened and locked together with the upper end of the other upper screw portion 211 by a second locking screw 34 that is locked into the upper end of the other screw body 21. The telescopic rod portion 32 is provided with an external threaded portion 322, and the barrel portion 31 is movably connected with an adjusting knob 35 that can axially rotate relative to the barrel portion 31, and the adjusting knob 35 is provided with an internal threaded portion 351 that is adapted to the external threaded portion 322 on the telescopic rod portion 32. The adjusting knob 35 is threadably connected with the external threaded portion 322 through the internal threaded portion 351, so that the telescopic rod portion 32 can be driven to telescope inward and outward relative to the barrel portion 31 to adjust the length by rotating the adjusting knob 35. It can be understood that when in use, the reduction fixation plate 1 and each screw assembly 2 can be installed first, and then the two adjacent screw assemblies 2 close to the fracture end can be pressurized or expanded with the help of the reduction clamp 4, and then the expansion and pressurization fine-tuning mechanism 3 can be installed, and after tightening the adjustment knob 35, the reduction clamp 4 can be removed. Subsequently, fine-tuning and correction can be performed according to the actual recovery situation of the patient. Only by adjusting the expansion and pressurization fine-tuning mechanism 3, clinical needs can be met to help patients recover as soon as possible.

[0031] Please refer to the attached Figure 4 In one preferred embodiment, a limiting long groove 312 arranged along the length direction is provided on the peripheral wall of the barrel 31, and a limiting pin 36 connected to the inner end of the telescopic rod 32 is provided in the limiting long groove 312, and an anti-rotation limiting structure is formed by the cooperation between the limiting pin 36 and the limiting long groove 312. However, those skilled in the art should understand that in other embodiments, the telescopic rod 32 and the barrel 31 can also achieve the prevention function through other preventing limiting structures, and are not limited to the specific implementation methods disclosed in this embodiment.

[0032] Please refer to the attached Figure 4 In one preferred embodiment, a scale ruler 313 is provided on the peripheral wall of the barrel 31, which can cooperate with the limit pin 36 to form a length adjustment reading indication structure.

[0033] Please refer to the attached Figure 4 In one preferred embodiment, the adjusting knob 35 is adapted to be fitted on the inner end of the barrel 31 away from the second sleeve portion 311, and an annular groove 314 is provided on the inner end of the barrel 31. The adjusting knob 35 is connected to a fixing pin 352 corresponding to the annular groove 314. The adjusting knob 35 is connected to the barrel 31 through the positioning cooperation between the fixing pin 352 and the annular groove 314.

[0034] Please refer to the attached Figure 5 In one preferred embodiment, the screw body 21 is a hollow nail structure. During surgery, the screw body 21 can be used in conjunction with a guide needle to improve the accuracy and convenience of surgical operations.

[0035] Please refer to the attached Figure 1 In one preferred embodiment, a connecting rib 12 for reinforcement is provided at the middle position of the reduction and fixation plate 1, and the arcuate slide groove 11 is divided by the connecting rib 12 to form a symmetrical two-section structure. Preferably, two sets of screw assemblies 2 are respectively provided in each section of the arcuate slide groove 11. Therefore, a total of four sets of screw assemblies 2 are provided on the entire reduction and fixation plate 1, and the two ends of the support and pressure fine-tuning mechanism 3 are respectively connected to the two adjacent sets of screw assemblies 2 in the middle. However, those skilled in the art should understand that in other implementations, the doctor may also choose to use only two sets of screw assemblies 2 or use more than four sets of screw assemblies 2 for locking according to the specific fracture conditions of the patient, and is not limited to the specific implementation methods disclosed in this embodiment.

[0036] Please refer to the attached Figure 3 In one preferred embodiment, the upper screw portion 211 of the screw body 21 is provided with two anti-rotation limit surfaces 2111 which are arranged opposite to each other and enable the screw body 21 to only slide laterally in the arc-shaped slide groove 11 but not to rotate.

[0037] Please refer to the attached Figure 3 , Attachment Figure 5 In one preferred embodiment, the first anti-slip teeth 13 are provided on the upper surface and / or the lower surface of the reset fixing plate 1. Preferably, the second anti-slip teeth 2131 are provided on the step portion 213 of the screw body 21. It can be understood that by providing the second anti-slip teeth 2131 on the upper surface and / or the lower surface of the reset fixing plate 1 and on the step portion 213, the locking stability of the screw assembly 2 and the reset fixing plate 1 can be improved, which is conducive to improving the reset stability to prevent reset loss.

[0038] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements do not deviate the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Claims

1. A percutaneous reduction, distraction and compression fixation device for clavicle fracture, characterized in that: The invention comprises a reduction and fixation plate (1) which is arranged on the body surface and adapted to the physiological curvature of the clavicle. The reduction and fixation plate (1) is provided with an arc-shaped slide groove (11) arranged along the length direction and penetrating the upper and lower surfaces of the reduction and fixation plate (1). A plurality of screw assemblies (2) are connected in the arc-shaped slide groove (11). The screw assemblies (2) comprise a screw body (21) and a locking nut (22). The screw body (21) comprises an upper screw portion (211), a lower screw portion (212) and a step portion (213) located between the upper screw portion (211) and the lower screw portion (212). The upper screw portion (211) of the screw body (21) is configured to be able to adaptably move from bottom to top. The locking nut (22) is inserted into the arc-shaped slide groove (11) and slides laterally along the arc-shaped slide groove (11); the locking nut (22) is adapted to be screwed on the upper screw rod portion (211) and cooperates with the step portion (213) to form a tight positioning structure to lock the screw body (21) on the reduction and fixation plate (1); a length-adjustable expansion and pressure fine-adjustment mechanism (3) located outside the body is connected between two adjacent screw assemblies (2) near the fracture end; the two ends of the expansion and pressure fine-adjustment mechanism (3) are respectively movably connected to the two adjacent screw assemblies (2) near the fracture end, so that the expansion and pressure fine-adjustment correction of the distal and proximal ends of the clavicle can be performed from outside the body through the expansion and pressure fine-adjustment mechanism (3); The expansion and pressurizing fine-adjusting mechanism (3) comprises a barrel (31) and a telescopic rod (32) which is telescopically sleeved and connected in the barrel (31). The telescopic rod (32) is configured to be able to be axially telescopic inward and outward relative to the barrel (31) only through the anti-rotation restriction of the anti-rotation limiting structure. A first sleeve connection portion (321) is provided on the outer end of the telescopic rod (32). The first sleeve connection portion (321) is provided with a sleeve connection hole which can be adapted to be sleeved on the upper end of the upper screw portion (211) of one of the screw bodies (21) in two adjacent screw assemblies (2) close to the fracture end. The first sleeve connection portion (321) is fastened and locked together with the upper end of the upper screw portion (211) by a first locking screw (33) which is locked into the upper end of the upper screw portion (211). A second sleeve connection portion (311) is provided on the outer end of the barrel (31) away from the first sleeve connection portion (321). The second sleeve connection portion (311) ) is provided with a sleeve hole that can be adapted to be sleeved on the upper end of the upper screw portion (211) of the other screw body (21), and the second sleeve portion (311) is fastened and locked together with the upper end of the other upper screw portion (211) through a second locking screw (34) that is locked into the upper end of the other screw body (21), and the telescopic rod portion (32) is provided with an external thread portion (322), and the barrel portion (31) is movably connected with an adjusting knob (35) that can rotate axially relative to the barrel portion (31), and the adjusting knob (35) is provided with an internal thread portion (351) that is adapted to the external thread portion (322) on the telescopic rod portion (32), and the adjusting knob (35) is connected together through the matching threads of the internal thread portion (351) and the external thread portion (322), so that the telescopic rod portion (32) can be driven to telescope inward and outward relative to the barrel portion (31) to adjust the length by rotating the adjusting knob (35).

2. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 1, characterized in that: A limiting long groove (312) arranged along the length direction is provided on the peripheral wall of the cylinder (31), and a limiting pin (36) connected to the inner end of the telescopic rod (32) is provided in the limiting long groove (312), and an anti-rotation limiting structure is formed by the cooperation between the limiting pin (36) and the limiting long groove (312).

3. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 2, characterized in that: A scale ruler (313) is arranged on the peripheral wall of the barrel (31) and can cooperate with the limit pin (36) to form a length adjustment reading indication structure.

4. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 1, characterized in that: The adjusting knob (35) is adapted to be fitted on the inner end of the barrel (31) away from the second sleeve portion (311), and an annular groove (314) is provided on the inner end of the barrel (31). A fixing pin (352) corresponding to the annular groove (314) is connected to the adjusting knob (35), and the adjusting knob (35) is connected to the barrel (31) through the positioning fit between the fixing pin (352) and the annular groove (314).

5. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 1, characterized in that: A connecting rib (12) for reinforcement is provided at the middle of the reset fixing plate (1), and the arc-shaped slide groove (11) is divided by the connecting rib (12) to form a symmetrical two-section structure.

6. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 5, characterized in that: Two sets of screw assemblies (2) are respectively arranged in each section of the arc-shaped slide groove (11).

7. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 1, characterized in that: The upper screw rod portion (211) of the screw body (21) is provided with two anti-rotation limit surfaces (2111) which are arranged opposite to each other and enable the screw body (21) to only slide laterally in the arc-shaped sliding groove (11) but not to rotate.

8. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to any one of claims 1 to 7, characterized in that: First anti-slip teeth (13) are provided on the upper surface and / or the lower surface of the resetting and fixing plate (1).

9. The percutaneous reduction, distraction and compression fixation device for clavicle fracture according to claim 8, characterized in that: A second anti-slip tooth (2131) is provided on the step portion (213) of the screw body (21).

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