Nerve retractor and disposable nerve retractor product comprising same
The arcuate, cushioned neurosurgical retractor addresses nerve root lacerations by minimizing direct contact and tissue trauma, enhancing surgical visibility and reducing postoperative numbness.
Patent Information
- Application Number
- CN202510748393.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2025-07-15
AI Technical Summary
The nerve hooks in the prior art can easily cause cutting damage to the nerve roots when the nerve is stretched for a long time, resulting in numbness of the patient's limbs after surgery.
A nerve hook is designed. The upper surface of the hook body forms an upwardly convex convex surface, the middle contacts the nerve, the outer edges of both sides do not contact the nerve, and the lower surface forms an arcuate concave surface. The hook and handle are made of polymer materials, and a soft elastic layer is set. The handle is cylindrical and has annular grooves, which is suitable for ergonomic design.
It avoids cutting damage to the nerve roots, increases surgical operation space, buffers squeeze injuries, improves grip comfort, is suitable for single use, and reduces the risk of infection.
Smart Images
Figure CN120304888A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of medical devices, and particularly relates to a nerve retractor and a disposable nerve retractor product containing the same. Background Art
[0002] Lumbar disc herniation is the most common lumbar degenerative disease. In recent years, with the development of minimally invasive spinal techniques, unilateral biportal endoscopic technique (UBE) can be used for minimally invasive treatment. In this surgical method, water is used as a medium, and tools such as a nucleus forceps are used under a monitor to remove the protruding nucleus pulposus to complete nerve root decompression. During the removal of the nucleus pulposus, a nerve retractor is needed to retract the nerve root and spinal cord to create an operating space for the decompression surgery and at the same time protect the nerve tissue from being damaged.
[0003] Currently, the nerve retractor used under the UBE scope clinically is a stainless steel metal retractor that can be repeatedly disinfected. It includes a handle and a hook body formed by integral bending. Its hook body is flat, and the edges on both sides of the hook body are relatively sharp, which is likely to cause cutting damage to the nerve root after long-term traction, resulting in limb numbness in patients after surgery.
[0004] Therefore, the above-mentioned prior art has at least the following problems: The nerve retractor in the prior art is likely to cause cutting damage to the nerve root during long-term traction of the nerve, resulting in limb numbness in patients after surgery. Summary of the Invention
[0005] This application provides a nerve retractor and a disposable nerve retractor product containing the same to solve the technical problem that the nerve retractor in the prior art is likely to cause cutting damage to the nerve root during long-term traction of the nerve, resulting in limb numbness in patients after surgery.
[0006] To solve the above technical problem, in a first aspect, an embodiment of this application provides a nerve retractor, including a hook part at the front end and a handle part at the rear end. Among them, the hook part includes a hook part body, the rear end of the hook part body is connected to the handle part, and the front end of the hook part body is turned up to form a hook body;
[0007] The upper surface of the hook part body protrudes upward to form an arc-shaped convex surface, and the arc-shaped convex surface is used to contact and retract the nerve. The protruding part in the middle of the arc-shaped convex surface contacts the nerve to avoid the outer edges on both sides of the arc-shaped convex surface from contacting the nerve.
[0008] Further, the cross-sectional shape of the hook part body is arc-shaped, and the lower surface of the hook part body forms an arc-shaped concave surface, and the arc-shaped concave surface is used to form an operating space.
[0009] Further, a soft elastic layer is provided on the arc-shaped convex surface.
[0010] Further, the hook body includes a front half for connecting to the hook and a rear half for connecting to the handle, and the soft elastic layer is disposed on the front half.
[0011] Further, the front half gradually narrows from one end close to the rear half to one end close to the hook.
[0012] Further, the radian of the corresponding central angle of the arc is rad.
[0013] Further, the handle is cylindrical.
[0014] Further, an annular groove for facilitating the insertion of a finger is further provided on the outer surface of the handle.
[0015] Further, the hook and / or the handle are made of a polymer material.
[0016] In a second aspect, an embodiment of the present application further provides a disposable nerve retractor product, including a packaging bag, and a nerve retractor as described in any one of the first aspect encapsulated in the packaging bag.
[0017] The nerve retractor and the disposable nerve retractor product containing the same according to the embodiments of the present application have at least the following technical effects:
[0018] (1) The upper surface of the hook body forms an upwardly convex arc-shaped convex surface. During the operation, the middle protruding part of the arc-shaped convex surface will contact the nerve tissue, while the outer edges on both sides do not directly contact the nerve tissue, thereby avoiding the nerve being cut and damaged by the relatively sharp outer edges after long-term traction. Therefore, during the operation, the middle protruding part of the arc-shaped convex surface is used to push open the nerve root and the spinal cord, and even if it is used for a long time, it will not cause nerve root cutting injury, which is beneficial to avoiding nerve root cutting injury and relieving symptoms such as numbness and discomfort in the lower limbs after the operation.
[0019] (2) The lower surface of the hook body forms an arc-shaped concave surface, which can form an arc-shaped surgical operation space, increasing the operation space for nucleus pulposus removal and facilitating the operation of decompression instruments.
[0020] (3) The arc-shaped convex surface is provided with a soft elastic layer, which can increase the elasticity and thus buffer the squeezing injury to the nerve during traction.
[0021] (4) The hook is made of a polymer material, which is more flexible than the metal material in the prior art and can further buffer the squeezing injury to the nerve during traction.
[0022] (5) The hook and the handle can be made into a disposable sterile packaged medical device without repeated disinfection.
[0023] The front half of the hook body narrows gradually from back to front to facilitate delicate operations.
[0024] (7) The handle is cylindrical. Compared with the flat handle in the prior art, it is easier to hold, thus facilitating the performance of delicate surgical operations.
[0025] (8) The handle is also provided with an annular groove for the fingers to dig into, to fit ergonomics, improve the holding comfort, and facilitate the precise operation of the hook at the front end. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0027] Figure 1 is a side view of a nerve retractor in an embodiment of the present application;
[0028] Figure 2 is an axonometric view of a nerve retractor in an embodiment of the present application;
[0029] Figure 3 is a top view of a nerve retractor in an embodiment of the present application;
[0030] Figure 4 is a cross-sectional schematic view of the hook body in an embodiment of the present application;
[0031] Figure 5 is a structural schematic view of the arc-shaped convex surface on the upper surface of a nerve retractor in an embodiment of the present application;
[0032] Figure 6 is a structural schematic view of the arc-shaped concave surface on the lower surface of a nerve retractor in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] The present application provides a nerve retractor and a disposable nerve retractor product containing the same, to solve the technical problem that in the prior art, the nerve retractor is likely to cause cutting damage to the nerve root during long-term nerve retraction, resulting in limb numbness in patients after surgery.
[0034] To better understand the above technical solutions, the following will elaborate on the above technical solutions in combination with the drawings in the specification and specific embodiments.
[0035] As Figures 1 to 3As shown, in one or more embodiments of the present application, a nerve retractor is provided, which is particularly suitable for retracting and protecting nerve roots during unilateral biportal endoscopy (UBE) spinal endoscopy surgery, and can better expose the surgical field to facilitate the removal of intervertebral disc nucleus pulposus.
[0036] Based on the orientation of the nerve retractor in the used state, the nerve retractor includes a hook portion 100 at the front end and a handle portion 200 at the rear end. The rear end of the hook portion 100 is connected to the front end of the handle portion 200. During use, hold the handle portion 200 and manipulate the hook portion 100 at the front end to retract the nerve root and spinal cord, creating an operating space for decompression surgery and protecting the nerve tissue from being damaged at the same time.
[0037] Specifically, as Figure 1 shown, the hook portion 100 and the handle portion 200 have an included angle a, and the included angle a is 130° to 150°. In this way, the handle portion 200 is inclined backward and upward relative to the hook portion 100, which can avoid the handle portion 200 blocking the hook portion 100 during use and affecting the surgical field.
[0038] In a preferred embodiment, the length of the hook portion 100 is 15 cm, the length of the handle portion 200 is the handle portion 200, and the included angle a between the hook portion 100 and the handle portion 200 is 145°.
[0039] As Figures 1 to 6 shown, the hook portion 100 includes a hook body 110. The rear end of the hook body 110 is connected to the front end of the handle portion 200. The front end of the hook body 110 is folded upward to form a hook 120. The hook body 110 is integrally in a narrow strip shape, and the hook body 110 protrudes upward, that is, the cross-sectional shape of the hook body 110 is arc-shaped. In this way, an upwardly convex arc-shaped convex surface 111 is formed on the upper surface of the hook body 110, and an upwardly concave arc-shaped concave surface 112 is formed on the lower surface of the hook body 110.
[0040] The arc-shaped convex surface 111 is used to contact and retract the nerve. During surgery, the middle protruding part of the arc-shaped convex surface 111 will contact the nerve tissue, while the outer edges on both sides do not directly contact the nerve tissue, thus avoiding the nerve being cut and damaged by the relatively sharp outer edges after long-term retraction. Therefore, during surgery, use the middle protruding part of the arc-shaped convex surface 111 to push open the nerve root and spinal cord, and even long-term use will not cause nerve root cutting injury, which is beneficial to avoiding nerve root cutting injury and relieving symptoms such as postoperative lower limb numbness and discomfort.
[0041] In addition, in the prior art, since the hook body 120 of the nerve retractor is flat, the straight hook body 120 will cut the surgical operation space, resulting in an increase in the operation difficulty of nucleus pulposus removal. However, in the embodiments of the present application, an arc-shaped concave surface 112 is formed on the lower surface of the hook body 110, which can form an arc-shaped surgical operation space, increasing the operation space for nucleus pulposus removal and facilitating the operation of decompression instruments, such as Figure 6 as shown
[0042] In the prior art, the nerve retractor is made of a metal material with a relatively hard texture, which increases the damage to the nerve. Therefore, in some embodiments of the present application, a soft elastic layer is provided on the arc-shaped convex surface 111 of the hook body 110. For example, the soft elastic layer can be a silica gel layer, a thermoplastic polyurethane (TPU) layer, etc. This soft elastic layer can increase the elasticity, thereby buffering the squeezing injury to the nerve during traction.
[0043] As Figure 2 shown, the hook body 110 includes a front half 110m located at the front end for connecting the hook body 120 and a rear half 110n located at the rear end for connecting the handle 200. It should be noted that since during use, basically only the front half 110m of the hook 100 will come into contact with the nerve, therefore, the soft elastic layer can be provided only on the front half 110m of the hook 100 to save usage and reduce costs.
[0044] Furthermore, the hook 100 is made of a polymer material, such as polyethylene (PE), polytetrafluoroethylene (PTFE), etc. Compared with the metal material in the prior art, it has a more flexible texture and can further buffer the squeezing injury to the nerve during traction. In addition, the handle 200 can also be made of the same material. In this way, the nerve retractor described in the embodiments of the present application can be made into a medical device with a disposable sterile package, that is, the disposable nerve retractor product, without the need for repeated disinfection.
[0045] In some embodiments of the present application, as Figure 4 shown, the cross-sectional shape of the hook body 110 is arc-shaped, and the radian of the central angle b corresponding to the arc is rad. For example, in a preferred embodiment, the arc length of the arc is 1.2 cm and the radian is so that the radian formed by the arc-shaped convex surface 111 can avoid the outer edges on both sides of the arc-shaped convex surface 111 from damaging the nerve tissue.
[0046] In some embodiments of the present application, as Figure 1As shown, the front half 110m of the hook body 110 gradually narrows from the rear (one end close to the rear half 110n) to the front (one end close to the hook body 120), that is, the arc length of the arc of the cross-section gradually becomes smaller, so as to facilitate fine operation.
[0047] In the prior art, the handle of the nerve retractor is flat, not easy to hold, and affects the control of the front hook body 120. For this reason, in an embodiment of the present application, as Figures 1 to 3 shown in FIGS. 5-6, the handle 200 is cylindrical. Compared with the flat handle 200 in the prior art, it is easier to hold, so as to facilitate the implementation of refined surgical operations.
[0048] Furthermore, as Figures 1 to 3 shown in FIGS. 5-6, the handle 200 is further provided with an annular groove 210 for the fingers to dig into, so as to fit ergonomics, improve the holding comfort, and facilitate the precise operation of the front hook portion 100.
[0049] An exemplary use process of the nerve retractor according to an embodiment of the present application is as follows:
[0050] During the lumbar unilateral biportal endoscopic surgery, after the lamina and the ligamentum flavum are resected, the nerve retractor is inserted through the operation channel, and the front hook body 120 and the arc-shaped convex surface 111 are used to carefully retract the nerve root and the spinal cord, expose the intervertebral disc and the nucleus pulposus tissue, facilitate the completion of nucleus pulposus removal, and at the same time avoid the cutting injury of the nerve root and the spinal cord, and relieve the symptoms such as numbness and discomfort of the lower limbs after lumbar surgery of the patient.
[0051] It should be understood that although the terms "first", "second", etc. may be used here to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiment, the first unit may be called the second unit, and similarly the second unit may be called the first unit.
[0052] The outer, middle, inner and other orientation terms mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and therefore may change accordingly according to their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.
[0053] The above is only a preferred embodiment of the present application, and does not impose any formal or substantial limitations on the present application. It should be noted that for those of ordinary skill in the technical field, without departing from the method of the present application, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as within the protection scope of the present invention. Those skilled in the art, without departing from the spirit and scope of the present application, when making some equivalent changes, modifications and evolutions using the technical content disclosed above, are all equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the substantial technology of the present application still fall within the scope of the technical solution of the present application.
Claims
1. A nerve retractor, characterized in that, It includes a hook part located at the front end and a handle part located at the rear end. Among them, the hook part includes a hook part body, the rear end of the hook part body is connected to the handle part, and a hook body extending upward is formed at the front end of the hook part body; The upper surface of the hook part body protrudes upward to form an arc-shaped convex surface, and the arc-shaped convex surface is used to contact and pull the nerve. The protruding part in the middle of the arc-shaped convex surface contacts the nerve to prevent the outer edges on both sides of the arc-shaped convex surface from contacting the nerve.
2. The nerve retractor according to claim 1, wherein, The cross-sectional shape of the hook part body is arc-shaped, and an arc-shaped concave surface is formed on the lower surface of the hook part body. The arc-shaped concave surface is used to form a surgical space.
3. A nerve retractor according to claim 1, characterized in that, A soft elastic layer is provided on the arc-shaped convex surface.
4. A nerve retractor according to claim 2, wherein, The hook part body includes a front half part for connecting the hook body and a rear half part for connecting the handle part, and the soft elastic layer is provided on the front half part.
5. The nerve retractor according to claim 4, wherein, The front half part gradually narrows from the end close to the rear half part to the end close to the hook body.
6. The nerve retractor according to claim 2, wherein, The radian of the central angle corresponding to the arc is 7. A nerve retractor according to claim 1, characterized in that, The handle part is in a cylindrical shape.
8. A nerve retractor according to claim 6, wherein, An annular groove for facilitating the insertion of fingers is further provided on the outer surface of the handle part.
9. A nerve retractor according to claim 1, wherein, The hook part and / or the handle part is made of a polymer material.
10. A disposable nerve retractor product, characterized in that, It includes a packaging bag and a nerve retractor as described in any one of claims 1 to 9 encapsulated in the packaging bag.