Traction reducer for lower leg fracture

Abstract

The utility model relates to the technical field of treatment of lower leg fractures, and specifically to a traction and reduction device for lower leg fractures. The utility model comprises at least two traction and reduction components, the traction and reduction components comprising a lower screw and at least two reduction devices movable along the lower screw, the reduction device comprising a sleeve sleeved on the lower screw, one end of the sleeve being rotatably connected with a screw sleeve, the screw sleeve being threadedly connected with the lower screw, a telescopic component being fixed on the sleeve, the upper end of the telescopic component being rotatably connected with an upper block, a through hole being provided on the upper block, a light rod and a screw tube being respectively provided on the upper blocks on both sides of the through hole, a top ring being fixed on one end of the light rod, the top ring being rotatably connected with one end of the screw tube, the inner thread of the screw tube being connected with an inner screw, and a stopper being fixed on the inner screw. After the Kirschner screw passes through the through holes of the two upper blocks, the screw tube drives the top ring to move and press against the patient's affected limb, so that the end of the Kirschner screw enters into the blind hole of the stopper on one side thereof, and the stopper can position the Kirschner screw. The Kirschner screw and the patient's affected limb can move relative to each other.

Description

Technical Field

[0001] The utility model relates to the technical field of lower leg fracture treatment, in particular to a lower leg fracture traction reducer. Background Art

[0002] Kirschner nails are often used to fix fracture fragments in patients with lower leg fractures during fracture surgery, or to fix fractures with low stress such as short fractures or avulsion fractures after surgery, so as to effectively fix the fracture site of the patient, facilitate the patient to undergo surgery and exercise early after surgery, and accelerate the patient's functional recovery. However, during the use of Kirschner nails, auxiliary human traction and gravity traction are often used on the affected limb to relieve the tension and retraction of the soft tissue at the fracture and dislocation, so as to achieve the purpose of treatment by resetting the fracture or dislocation. Existing human traction operations cannot achieve sufficient and continuous traction force, and not only the traction effect is limited, but also sometimes require cutting the broken ends of the fracture, which damages the blood supply of the bone and is prone to complications such as infection and nonunion.

[0003] The patent document with application number CN201821335700.6 and titled "Traction and reduction device for lower leg fracture and traction and reduction assembly for lower leg fracture" discloses a traction and reduction device for lower leg fracture that can stably and reliably perform preliminary traction and reduction on lower leg fracture, so as to simplify the surgical process, shorten the operation time and reduce the surgical trauma. The traction and reduction device for lower leg fracture includes at least two traction and reduction assemblies, the traction and reduction assemblies include a screw and at least two reducers that can move along the screw, the reducers include a positioning seat that can be raised and lowered and rotated, and a positioning hole corresponding to the Kirschner nail is provided on the positioning seat. The traction and reduction device for lower leg fracture can stably and reliably perform preliminary traction and reduction on lower leg fracture, so as to simplify the surgical process, shorten the operation time and reduce the surgical trauma. The traction and reduction assembly for leg fracture can perform preliminary traction and reduction on lower leg fracture stably for a long time. However, after the Kirschner nail passes through the patient, it is difficult to effectively fix the Kirschner nail through the affected limb, which causes the Kirschner nail to slide in the affected limb, posing certain safety hazards.

[0004] The patent document with application number CN201922098372.3 and titled "A Traction Reducing Device for Lower Leg Fracture" discloses a traction reducing device for lower leg fracture that is convenient for stabilizing the affected limb and can prevent the Kirschner nail from sliding in the affected limb. In the solution recorded in the patent, the fixing rod can be extended and retracted by rotating the adjustment ring, so as to achieve the function of fixing on both sides of the affected limb, and can effectively prevent the Kirschner nail from sliding inside the affected limb. Although the technical solution of the patent can stabilize the patient's affected limb and prevent the Kirschner nail from moving in the patient's affected limb. However, the Kirschner nails all need to be clamped and locked by a locking mechanism. In order to ensure the stability of the Kirschner nails, it is necessary to provide a large supporting force for the Kirschner nails. Indentations or burrs are prone to appear on the Kirschner nails, which leads to the surface of the Kirschner nails being damaged. In the process of clamping the nail tail with Kirschner forceps and continuously and stably exerting force to pull out the Kirschner nails, the surface of the Kirschner nails is damaged, and the process of pulling out the Kirschner nails will cause stress stimulation to the fracture of the patient. At the same time, it is easy to cause secondary damage to the muscle tissue of the patient's affected limb, thereby increasing the time for the patient to recover. When the Kirschner forceps cannot remove the Kirschner pin and an electric drill is used to assist in removing the Kirschner pin, the electric drill is used to rotate the Kirschner pin and gradually apply force to remove the Kirschner pin. If the surface of the Kirschner pin is damaged, the process of rotating and removing the Kirschner pin will cause greater damage to the patient's fracture and muscle tissue. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a traction and reduction device for lower leg fractures which is convenient for stabilizing the Kirschner nail and the affected limb of the patient and can avoid damaging the smooth surface of the Kirschner nail.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] A traction and reduction device for lower leg fractures comprises at least two traction and reduction components, wherein the traction and reduction components comprise a lower screw and at least two reduction devices movable along the lower screw. The reduction device comprises a sleeve sleeved on the lower screw, one end of the sleeve being rotatably connected with a screw sleeve, the screw sleeve being threadedly connected with the lower screw, a telescopic component being fixed on the sleeve, the upper end of the telescopic component being rotatably connected with an upper block, a through hole being provided on the upper block, a light rod and a screw tube being respectively arranged on the upper block on both sides of the through hole, the axis of the light rod and the screw tube being parallel to the axis of the through hole, the light rod being slidably connected with the upper block, the screw tube being threadedly connected with the upper block, a top ring being fixed on one end of the light rod, the top ring being concentric with the through hole, the top ring being rotatably connected with one end of the screw tube, the inner thread of the screw tube being connected with an inner screw, the inner screw being concentric with the screw tube, and a stopper being fixed on the inner screw.

[0008] Specifically, the telescopic assembly includes a branch pipe fixed on the sleeve, the branch pipe is perpendicular to the sleeve, the branch pipe is internally threadedly connected to an upper screw rod, the upper screw rod is threadedly connected to a nut, and the upper block is rotatably connected to the upper end of the upper screw rod.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. After the Kirschner nail passes through the through holes of the two upper blocks, rotate the screw tube, which drives the top ring to move and press against the patient's affected limb, and rotate the inner screw rod so that the end of the Kirschner nail enters the blind hole of the block on one side, and the block can position the Kirschner nail. The Kirschner nail and the patient's affected limb can move relative to each other.

[0011] 2. The end of the Kirschner nail is inserted into the blind hole and is blocked and positioned by the block, which can prevent the smooth surface of the Kirschner nail from being damaged. The stress stimulation caused to the patient's fracture during the process of pulling out the Kirschner nail can be reduced, and the degree of damage to the patient's muscle tissue can be reduced.

[0012] 3. The traction and reduction device for lower leg fractures provided by the utility model can stably and reliably perform preliminary traction and reduction on lower leg fractures, thereby achieving the purpose of simplifying the surgical process, shortening the surgical time, and reducing surgical trauma. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model when in use.

[0014] Figure 2 It is a front view of the utility model.

[0015] Figure 3 A schematic diagram of the resetter.

[0016] Figure 4 It is a top view of the utility model.

[0017] The names of the parts in the attached drawings are:

[0018] 1 Lower screw

[0019] 2 Screw sleeve

[0020] 3 Casing

[0021] 4 Locking screw

[0022] 5 branches

[0023] 6 Upper screw

[0024] 7 Nut

[0025] 8 Upper Block

[0026] 9 Kirschner nail

[0027] 10 Top ring

[0028] 11 Bare

[0029] 12 Solenoid

[0030] 13 Internal screw

[0031] 14 Ear Plate

[0032] 15 Stopper

[0033] 16 Nut

[0034] 17 Blind hole 18 Through hole. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0036] Embodiment 1:

[0037] Reference Figure 1-Figure 4 As shown, the traction and reduction device for lower leg fracture includes at least two traction and reduction components, and the traction and reduction components include a lower screw rod 1 and at least two reducers that can move along the lower screw rod 1.

[0038] The resetter comprises a sleeve 3 sleeved on the lower screw 1, one end of the sleeve 3 is rotatably connected with a screw sleeve 2, and the screw sleeve 2 is threadedly connected with the lower screw 1. The screw sleeve 2 and the sleeve 3 are both threadedly connected with a locking screw 4, and the locking screw 4 is tightly pressed against the lower screw 1.

[0039] A telescopic assembly is fixed on the sleeve 3. The telescopic assembly includes a branch pipe 5 fixed on the sleeve 3, the branch pipe 5 is perpendicular to the sleeve 3, the branch pipe 5 is internally threadedly connected to an upper screw rod 6, a nut 7 is threadedly connected to the upper screw rod 6, and an upper block 8 is rotatably connected to the upper end of the upper screw rod 6.

[0040] The upper end of the telescopic assembly is rotatably connected to an upper block 8, and a through hole 18 is provided on the upper block 8. A polished rod 11 and a screw 12 are respectively provided on the upper block 8 on both sides of the through hole 18, and the polished rod 11 and the screw 12 both penetrate the upper block 8 on one side thereof. The axis of the polished rod 11 and the screw 12 are parallel to the axis of the through hole 18, and the polished rod 11 is slidably connected to the upper block 8. The screw 12 is threadedly connected to the upper block 8. A top ring 10 is fixed to one end of the polished rod 11, and the top ring 10 is concentric with the through hole 18, and the top ring 10 is rotatably connected to one end of the screw 12.

[0041] The traction and reduction device for lower leg fracture is used in conjunction with two Kirschner nails 9.

[0042] When the medical staff respectively drive two Kirschner nails 9 into the tibial tuberosity and calcaneus of the patient, refer to Figure 1 and Figure 4As shown, the Kirschner nail 9 driven into the patient's tibial tuberosity passes through the through holes 18 of the two upper blocks 8 on the right side, and the Kirschner nail 9 driven into the patient's calcaneus passes through the through holes 18 of the two upper blocks 8 on the left side. At the same time, the Kirschner nail 9 passes through the top ring 10 on one side thereof.

[0043] The present traction and reduction device for lower leg fracture is used to fix two Kirschner screws 9 and to perform traction and reduction operation on the lower leg fracture of the patient through the Kirschner screws 9. Since two reducers are respectively connected to the lower screw 1 in each traction and reduction assembly, the medical staff can move the reducer along the axial direction of the lower screw 1 to drive the two Kirschner screws 9 to perform bilateral distraction operation, and adjust the position of the Kirschner screws 9 by lifting and rotating the upper block 8, so as to perform preliminary traction and reduction on the patient's leg fracture site, so as to simplify the surgical process, shorten the operation time and reduce trauma.

[0044] When the reducer moves on the lower screw 1, the locking screw 4 is loosened and the screw sleeve 2 is rotated, so that the reducer can move in the axial direction of the lower screw 1. When the reducer needs to be positioned, the locking screw 4 is rotated so that the locking screw 4 is tightly against the lower screw 1 to achieve stable positioning of the reducer.

[0045] Medical personnel can adjust the height of the upper block 8 by rotating the upper screw 6, so that the Kirschner nail 9 can pass through the through hole 18 on the upper block 8. After the height of the upper block 8 is adjusted, the nut 7 can be rotated to tightly abut the branch pipe 5, thereby stabilizing the upper screw 6.

[0046] Medical personnel can move the Kirschner pin 9 along the axial direction of the lower screw 1 to pull the patient's affected limb. That is, the Kirschner pin 9 at one end of the patient's leg is fixed, and the Kirschner pin 9 at the other end of the leg is pulled. The two resetters on both sides of the patient's leg respectively drive the two ends of the Kirschner pin 9 to perform bilateral traction, so as to effectively offset the muscle pulling force to perform traction.

[0047] After the traction and reduction device for lower leg fracture has completed traction on the patient's affected limb, the screw tube 12 is rotated to make the top ring 10 move toward the patient's affected limb, and the top ring 10 is used to resist the patient's affected limb.

[0048] Embodiment 2:

[0049] Based on Example 1, refer to Figure 2-Figure 4 As shown,

[0050] The inner thread of the screw tube 12 is connected to an inner screw rod 13, which is concentric with the screw tube 12. A nut 16 is threadedly connected to the inner screw rod 13. A stopper 15 is fixed to the inner screw rod 13. An ear plate 14 is fixed to the inner screw rod 13, and the stopper 15 is fixed to the ear plate 14. A blind hole 17 concentric with the through hole 18 is opened on the stopper 15.

[0051] The inner screw 13 is rotated so that the end of the Kirschner pin 9 enters the blind hole 17 of the block 15 on one side thereof, and the block 15 is used to block the end of the Kirschner pin 9. Then the nut 16 is rotated so that the nut 16 is tightly pressed against the screw tube 12, thereby fixing the inner screw 13. The end of the Kirschner pin 9 is blocked by the block 15, and the Kirschner pin 9 cannot move relative to the present lower leg fracture traction reducer, thereby preventing the Kirschner pin 9 from moving relative to the patient's affected limb.

[0052] The end of the Kirschner pin 9 is inserted into the blind hole 17 and is blocked and positioned by the stopper 15, which can prevent the smooth surface of the Kirschner pin 9 from being damaged, and can reduce the stress stimulation caused to the fracture of the patient during the process of pulling out the Kirschner pin 9, thereby reducing the degree of damage to the patient's muscle tissue.

[0053] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0055] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A traction and reduction device for lower leg fractures, comprising at least two traction and reduction components, wherein the traction and reduction components comprise a lower screw (1) and at least two reducers movable along the lower screw (1), characterized in that: The resetter comprises a sleeve (3) sleeved on a lower screw rod (1), one end of the sleeve (3) is rotatably connected to a screw sleeve (2), the screw sleeve (2) is threadedly connected to the lower screw rod (1), a telescopic assembly is fixed on the sleeve (3), the upper end of the telescopic assembly is rotatably connected to an upper block (8), a through hole (18) is provided on the upper block (8), a polished rod (11) and a screw tube (12) are respectively arranged on the upper block (8) on both sides of the through hole (18), and the axes of the polished rod (11) and the screw tube (12) are axially aligned with the lower screw rod (11). The axis of the through hole (18) is parallel, the light rod (11) is slidably connected to the upper block (8), the screw tube (12) is threadedly connected to the upper block (8), a top ring (10) is fixed to one end of the light rod (11), the top ring (10) is concentric with the through hole (18), the top ring (10) is rotatably connected to one end of the screw tube (12), an internal screw rod (13) is connected to the internal thread of the screw tube (12), the internal screw rod (13) is concentric with the screw tube (12), and a stopper (15) is fixed to the internal screw rod (13).

2. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: The telescopic assembly comprises a branch pipe (5) fixed on the sleeve (3), the branch pipe (5) is perpendicular to the sleeve (3), the branch pipe (5) is internally threadedly connected to an upper screw rod (6), the upper screw rod (6) is threadedly connected to a nut (7), and an upper block (8) is rotatably connected to the upper end of the upper screw rod (6).

3. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: The threaded sleeve (2) and the sleeve (3) are both threadedly connected with a locking screw (4), and the locking screw (4) is tightly pressed against the lower screw rod (1).

4. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: The inner screw (13) is threadedly connected with a nut (16).

5. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: The stopper (15) is provided with a blind hole (17) which is concentric with the through hole (18).

6. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: A lug plate (14) is fixed on the inner screw rod (13), and a stopper (15) is fixed on the lug plate (14).

7. The traction and reduction device for lower leg fracture according to claim 1, characterized in that: The polished rod (11) and the spiral tube (12) both penetrate the upper block (8) on one side thereof.

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