A nerve traction external fixator

Abstract

The present invention discloses a nerve traction external frame, belonging to the field of medical device technology, comprising a threaded rod, two traction components, and two support components. The two support components are symmetrically arranged, the threaded rod is horizontally arranged on the two support components, the threaded rod and the two support components are slidably engaged, the two traction components are symmetrically arranged horizontally on the threaded rod, and the two support components are arranged inside the two traction components. The present invention pulls the proximal and distal ends of a nerve to extend the severed nerve, facilitate subsequent nerve suturing, and achieve healing of the proximal and distal ends of the nerve.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a nerve traction external frame. Background Art

[0002] Neurosurgery is a branch of surgery. It is based on surgery as the main treatment method in surgery, and uses unique neurosurgery research methods to study the human nervous system, such as the brain, spinal cord and peripheral nervous system, as well as its related ancillary organs. Nerve bundle rupture injury is a common injury in the field of neurosurgery. It requires anastomosis and repair of the nerve ends. During the anastomosis, a defect often occurs after the stump is cut. At this time, if an "end-to-end" anastomosis is performed, the tension of the anastomosis is too high, which is not conducive to postoperative nerve regeneration and repair, and there is a potential risk of anastomosis separation due to excessive tension. Therefore, nerve traction extension will be used before direct suturing.

[0003] For example, a neurosurgery retractor with publication number CN209360767U includes a retractor frame on which a driving gear and a driven gear are rotatably mounted. However, most retractors in the prior art are hinged structures. During retraction, the surgeon grasps the two forceps of the retractor, but this makes it difficult to control the force. In addition, the retraction structure is V-shaped, which provides a smaller surgical field. When using the present invention, the head of the handle can be inserted into the connecting slot, and the handle can be rotated to drive the rotating shaft of the driving gear, causing the driving gear to rotate. When the driving gear rotates, it can also drive the driven gear to rotate. The driving gear and the driven gear rotate in opposite directions, so the driving gear plate and the driven gear plate move closer to or farther from each other, driving the retractor plate to open or close. The retractor plate is detachably connected to the sliding frame, making it easy to remove and clean, and to replace different types of retractor plates. However, this retractor cannot be used to retract nerves.

[0004] The traction nerve extender with publication number CN2307540Y uses a ratchet structure to pull the nerve, but cannot pull the distal and proximal ends of the nerve at the same time. Moreover, the device is large in size and complex in structure, and cannot be used for pulling nerves in the body, making it inconvenient for practical use.

[0005] Publication number CN104178422B describes a device for the traction and growth of axons. It consists of a culture and traction control system and a mechanical device. This device can flexibly control the length, direction, and speed of axon growth, enabling the rapid cultivation of nerve tissue of appropriate length and regular growth, tailored to the patient's needs. This device can be used only for the cultivation of isolated neural tissue.

[0006] Therefore, the existing nerve traction device is large in size and complex in structure, and can only be used to traction the nerves in vitro, but cannot be used to traction the growth of nerves in vivo. Summary of the Invention

[0007] The embodiment of the present invention provides a nerve retraction external frame to solve the problems in the prior art.

[0008] An embodiment of the present invention adopts the following technical solution: a nerve traction external frame, including a threaded rod, two traction parts and two support parts, the two support parts are symmetrically arranged, the threaded rod is horizontally arranged on the two support parts, the threaded rod is slidably fitted with the two support parts, the two traction parts are symmetrically arranged horizontally on the threaded rod, and the two support parts are arranged on the inner sides of the two traction parts.

[0009] Furthermore, the pulling component is connected to the pulling rope.

[0010] Furthermore, a nerve conduit is provided on the pulling rope.

[0011] Furthermore, the two supporting components each include a locking connector and a bone needle. The two locking connectors are symmetrically arranged on the threaded rod. The locking connector includes a transverse through hole and a longitudinal clamping portion. The locking connector is threadedly connected to the threaded rod through the transverse through hole, and the locking connector is clamped to the bone needle through the longitudinal clamping portion.

[0012] Furthermore, each of the pulling components includes a front locking knob, a sliding pulling mechanism and a rear locking knob. The rear locking knob, the sliding pulling mechanism and the front locking knob are arranged on the threaded rod in sequence from the middle to the end of the threaded rod. The front locking knob and the rear locking knob rotate to abut against the sliding pulling mechanism. The sliding pulling mechanism is slidably mounted on the threaded rod, and the front locking knob and the rear locking knob are threadedly connected to the threaded rod.

[0013] Furthermore, each sliding pulling mechanism includes a sliding block, a pulling hook, an outer tube, and an inner tube. The pulling hook is located at the bottom of the sliding block, one end of the inner tube abuts the sliding block, and the other end of the inner tube is sleeved in the outer tube. The outer tube and the inner tube slide together, the rear locking knob abuts the outer tube, and the front locking knob abuts the sliding block. A spring is provided in the outer tube that abuts the inner tube, and the pulling hook is connected to the pulling rope.

[0014] Furthermore, an observation window is provided on the outer cylinder, and a scale is provided on the inner cylinder, and the positions of the observation window and the scale correspond to each other.

[0015] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0016] First, when the present invention is to pull the proximal and distal ends of the nerve, the rear locking knob is rotated on the threaded rod, and the rear locking knob pushes the sliding block to move outward on the threaded rod. After the position of the sliding block is fixed, the front locking knob is rotated to make the front locking knob contact the sliding block, and the sliding block is fixed to the threaded rod by the front locking knob and the rear locking knob. The movement of the sliding block drives the position of the traction hook to move, thereby driving the traction rope to pull the proximal and distal ends of the nerve, so as to extend the broken nerve and facilitate subsequent nerve suturing.

[0017] Secondly, since the growth of nerve traction requires a long period of time (several months), the present invention arranges the bone needle of the supporting component on the bone, so that the limbs can also move during the process of nerve traction growth.

[0018] Third, the locking connector of the support component of the present invention facilitates adjustment of the lateral distance between the bone needles and the longitudinal height of the threaded rod, flexibly controls the pulling distance and angle, and facilitates installation and disassembly.

[0019] Fourthly, a spring connected to the inner cylinder and a front locking knob are provided in the outer cylinder. The function of the spring is that after the pulling position is roughly determined, the inner cylinder can be driven by the spring to move outward relative to the outer cylinder, thereby pushing the sliding block to move slightly outward on the threaded rod. Therefore, the position of the sliding block can be fine-tuned by rotating the front locking knob, so that the pulling rope is always in a tensioned state, thereby effectively pulling the nerve. If the pulling rope is found to be loose, it can be adjusted by rotating the front locking knob.

[0020] Fifth, the sliding pulling mechanism of the present invention is slidably sleeved on the threaded rod, thereby facilitating fine adjustment of the pulling position and adjusting the angle of the pulling hook by rotating the sliding block to obtain a suitable nerve traction angle.

[0021] Sixth, the function of the nerve conduit in the present invention is mainly to prevent scar adhesion during the process of nerve traction growth, and has a guiding effect, so that the nerve extends and grows in the direction of the nerve conduit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3is a schematic diagram of the three-dimensional structure of the pulling component of the present invention;

[0026] Figure 4 This is an exploded view of the three-dimensional structure of the pulling component of the present invention;

[0027] Figure 5 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0028] Reference numerals:

[0029] Threaded rod 1, pulling component 2, front locking knob 20, sliding block 21, pulling hook 22, outer cylinder 23, inner cylinder 24, rear locking knob 25, spring 26, pulling rope 27, nerve guide tube 28, observation window 29, scale 291, supporting component 3, locking connector 31, bone needle 32, bone 4, proximal nerve 5, distal nerve 6, incision 7, skin 8. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The following combination Figures 1 to 5 As shown, an embodiment of the present invention provides a nerve traction external frame, including a threaded rod 1, two traction parts 2 and two support parts 3, the two support parts 3 are symmetrically arranged, the threaded rod 1 is horizontally arranged on the two support parts 3, the threaded rod 1 and the two support parts 3 are slidably matched, the two traction parts 2 are symmetrically arranged horizontally on the threaded rod 1, and the two support parts 3 are arranged on the inner side of the two traction parts 2. One end of the traction rope 27 is connected to the traction part 2, and the other end of the traction rope 27 is connected to the nerve. A nerve catheter is provided on the traction rope 27, specifically, a nerve catheter is provided near the nerve, and the nerve is placed in the nerve catheter 28. The function of the nerve catheter 28 is mainly to prevent scar adhesion, and then it has a guiding function, so that the nerve extends and grows in the direction of the nerve catheter 28.

[0032] Specifically, both support components 3 include a locking connector 31 and a bone pin 32. The two locking connectors 31 are symmetrically arranged on the threaded rod 1. The locking connectors 31 include transverse through-holes and longitudinal engaging portions. The locking connectors 31 are threadedly connected to the threaded rod 1 via the transverse through-holes, and the locking connectors 31 are engaged with the bone pins 32 via the longitudinal engaging portions. This facilitates adjustment of the transverse distance between the bone pins and the longitudinal height of the threaded rod, allowing for flexible control of the pulling distance and angle, and facilitating installation and removal. The bone pins of the support components are positioned on the bone, allowing for easy limb movement during nerve traction and growth, thereby enhancing patient comfort.

[0033] At the same time, the pulling component 2 is further improved. The pulling component 2 includes a front locking knob 20, a sliding pulling mechanism and a rear locking knob 25. The rear locking knob 25, the sliding pulling mechanism and the front locking knob 20 are arranged on the threaded rod 1 in sequence from the middle to the end. The front locking knob 20 and the rear locking knob 25 are rotated to abut against the sliding pulling mechanism. The sliding pulling mechanism is slidably sleeved on the threaded rod 1. The front locking knob 20 and the rear locking knob 25 are threadedly connected to the threaded rod (1).

[0034] Each sliding pulling mechanism is configured to include a sliding block 21, a pulling hook 22, an outer tube 23, and an inner tube 24. The pulling hook 22 is located at the bottom of the sliding block 21, one end of the inner tube 24 abuts against the sliding block 21, and the other end of the inner tube 24 is sleeved in the outer tube 23. The outer tube 23 and the inner tube 24 slide together, the rear locking knob 25 abuts against the outer tube 23, and the front locking knob 20 abuts against the sliding block 21. A spring 26 is provided in the outer tube 23 and abuts against the inner tube 24. The pulling hook 22 is connected to the pulling rope 27.

[0035] A spring 26 is installed within the outer tube 23, abutting against the inner tube 24. Once the pulling position is roughly determined, the spring can drive the inner tube 24 outward relative to the outer tube 23, thereby pushing the slider 21 slightly outward on the threaded rod 1. Therefore, simply by rotating the front locking knob 20, the position of the slider 21 can be fine-tuned, keeping the pulling rope 27 in a constant tensioned state, thereby effectively pulling the nerve. If the pulling rope 27 is found to be loose, it can be adjusted by rotating the front locking knob 20.

[0036] The outer tube 23 is also provided with an observation window 29, and the inner tube 24 is provided with a scale 291. The observation window and the scale are positioned in a manner corresponding to each other. The scale can be seen through the observation window 29, which facilitates accurate determination of the traction position and observation of changes in the traction position, thereby determining the length of the stretched nerve.

[0037] Working principle of the present invention: When the present invention is used, an incision 7 is made on the skin 8 at the location of the patient's nerve rupture, the lower ends of the two bone needles 32 are respectively inserted into the bone 4, one end of the traction rope 27 is connected to the traction hook 22, and the other end is connected to the nerve after passing through the nerve conduit 28, and the nerve is placed in the nerve conduit 28. The position of the threaded rod 1 is adjusted by two locking connectors 31, and the threaded rod 1 is fixed to the bone needle 32 by the two locking connectors 31. After the position is determined, the rear locking knob 25 is rotated on the threaded rod 1 to make the nerve ruptured. The sliding block 21 moves outward on the threaded rod 1, and the movement of the sliding block 21 drives the position of the traction hook 22 to move, thereby driving the traction rope 27 to pull the proximal end 5 and the distal end 6 of the nerve to extend the broken nerve, which is convenient for the subsequent suturing of the proximal end 5 and the distal end 6 of the nerve. After determining the appropriate traction position, rotate the front locking knob 20 and make the front locking knob 20 contact the sliding block 21. Fix the sliding block 21 to the threaded rod 1 through the front locking knob 20 and the rear locking knob 25, and then suture the incision 7.

[0038] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A nerve retraction frame, characterized in that: It comprises a threaded rod (1), two pulling parts (2) and two supporting parts (3), wherein the two supporting parts (3) are symmetrically arranged, the threaded rod (1) is horizontally arranged on the two supporting parts (3), the threaded rod (1) and the two supporting parts (3) are slidably matched, the two pulling parts (2) are symmetrically arranged horizontally on the threaded rod (1), and the two supporting parts (3) are arranged on the inner sides of the two pulling parts (2); The pulling component (2) is connected to the pulling rope (27); a nerve conduit (28) is sleeved on the pulling rope (27); the two supporting components (3) each include a locking connector (31) and a bone needle (32), the two locking connectors (31) are symmetrically arranged on the threaded rod (1), the locking connector (31) includes a transverse through hole and a longitudinal clamping portion, the locking connector (31) is threadedly connected to the threaded rod (1) through the transverse through hole, and the locking connector (31) is clamped to the bone needle (32) through the longitudinal clamping portion; Each pulling member (2) includes a front locking knob (20), a sliding pulling mechanism and a rear locking knob (25), the rear locking knob (25), the sliding pulling mechanism and the front locking knob (20) are sequentially arranged on the threaded rod (1) from the middle portion toward the end portion, the front locking knob (20) and the rear locking knob (25) are rotatably abutted against the sliding pulling mechanism, the sliding pulling mechanism is slidably sleeved on the threaded rod (1), the front locking knob (20) and the rear locking knob (25) are threadedly connected to the threaded rod (1); each sliding pulling mechanism includes a sliding block (2 1), a pulling hook (22), an outer tube (23), and an inner tube (24), wherein the pulling hook (22) is located at the bottom of the sliding block (21), one end of the inner tube (24) is in contact with the sliding block (21), and the other end of the inner tube (24) is sleeved in the outer tube (23), and the outer tube (23) and the inner tube (24) are slidably matched, the rear locking knob (25) is in contact with the outer tube (23), and the front locking knob (20) is in contact with the sliding block (21), and a spring (26) is provided in the outer tube (23) and is in contact with the inner tube (24), and the pulling hook (22) is connected to the pulling rope (27).

2. The nerve retraction frame according to claim 1, characterized in that: An observation window (29) is provided on the outer cylinder (23), and a scale (291) is provided on the inner cylinder (24), and the positions of the observation window (29) and the scale (291) correspond to each other.

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