A nerve retractor

Abstract

The present invention relates to the technical field of medical devices, and discloses a nerve retractor, which includes a strip-shaped main body, a tongue arranged at the front end of the main body, and a handle arranged at the rear end of the main body. The main body and the tongue are both flat, and the width of the tongue is smaller than that of the main body. When in use, the tongue is first inserted into the intervertebral space from the opening of the annulus fibrosus along an expansion core that matches it. At this time, the wider main body is stuck at the opening and remains outside the intervertebral space. Then the nerve retractor is rotated to block the passing root or exit root of the nerve, so that a channel can be reserved for the insertion of a fusion device. Based on the above structure, since the force point of the nerve retractor is on the end plate rather than on the nerve root, the position of the nerve retractor will not cause a large slip or loosening due to the insertion of the fusion device or the change of the assistant's strength, so that the nerve root can be protected more efficiently and safely, and the irritation or damage to the nerve root can be reduced. At the same time, the burden of the assistant can be reduced, making it easier.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a nerve retractor. Background Art

[0002] Lumbar degenerative disease is a general term for lumbar degenerative disc disease, degenerative instability, stenosis, slippage, and scoliosis. The main clinical manifestation is low back and leg pain. It is a common and frequently occurring disease in spinal surgery. For patients with surgical indications, safe and effective decompression and fusion are often the key to treatment. Compared with traditional open surgery, endoscopic decompression and fusion can minimize surgical damage while achieving the same decompression and fusion effects as open surgery. However, whether it is open surgery or endoscopic decompression and fusion, complications of nerve damage may occur during the implantation of the fusion device after lumbar decompression. Therefore, how to avoid and protect the nerve roots more safely and efficiently is an issue that needs to be considered during surgery.

[0003] Existing endoscopic decompression and fusion surgery usually uses a baffle to protect the passing or exiting roots of the nerves, so as to facilitate the safe implantation of the fusion device and reduce irritation or damage to the nerve roots. During the operation, the doctor presses the front end of the baffle on the intervertebral space or the surface of the vertebral body, and at the same time pulls the nerve roots apart to leave a channel for the implantation of the fusion device. The disadvantage of this technology is that the force of the baffle is applied to the nerve roots. Therefore, during the percutaneous implantation of the fusion device, there are high requirements for the stability of the baffle. The assistant must have continuous, steady and balanced force when holding the baffle to prevent the baffle from slipping or loosening and causing irritation or damage to the nerve roots. Summary of the invention

[0004] The purpose of the present invention is to provide a nerve retractor which can better protect nerve roots during endoscopic decompression and fusion surgery and is easy to use and highly safe.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a nerve retractor, which includes a strip-shaped main body, a tongue arranged at the front end of the main body, and a handle arranged at the rear end of the main body, wherein the main body and the tongue are both flat, and the width of the tongue is smaller than the width of the main body.

[0006] In some embodiments of the present application, one side surface of the tongue is an arc surface, and the other side surface is a plane, and in the cross section of the tongue, the arc length accounts for one third of the circumference.

[0007] In some embodiments of the present application, one side surface of the main body is an arc surface, and the other side surface is a plane, and in the cross section of the main body, the arc length accounts for one third of the circumference.

[0008] In some embodiments of the present application, the arc surface of the tongue portion and the arc surface of the main body portion are on the same arc surface.

[0009] In some embodiments of the present application, the width of the tongue is 2 to 8 mm.

[0010] In some embodiments of the present application, the width of the main body is 4 to 12 mm.

[0011] In some embodiments of the present application, the width of the tongue portion is 3 mm, and the width of the main body portion is 5 mm.

[0012] In some embodiments of the present application, the width of the tongue portion is 6 mm, and the width of the main body portion is 10 mm.

[0013] In some embodiments of the present application, the length of the tongue is 25 to 35 mm, and the length of the main body is 110 to 120 mm.

[0014] In some embodiments of the present application, the length of the tongue is 30 mm, and the length of the main body is 115 mm.

[0015] In some embodiments of the present application, the handle is at a certain angle to the main body.

[0016] In some embodiments of the present application, the angle formed by the handle and the main body is 120-150°.

[0017] In some embodiments of the present application, the angle formed by the handle and the main body is 130°.

[0018] In some embodiments of the present application, the handle is flat, and its width is greater than or equal to the width of the main body.

[0019] In some embodiments of the present application, both side edges and one side surface of the handle are wavy.

[0020] The present invention provides a nerve retractor, which has the following beneficial effects compared with the prior art:

[0021] The nerve hook provided by the present invention comprises a strip-shaped main body, a tongue arranged at the front end of the main body, and a handle arranged at the rear end of the main body. Both the main body and the tongue are flat, and the width of the tongue is smaller than the width of the main body. When in use, the tongue of the nerve hook is first inserted into the intervertebral space from the breach of the annulus fibrosus along the expansion core matched therewith. At this time, the wider main body is stuck at the breach and remains outside the intervertebral space. Then the nerve hook is rotated to block the passing root or exit root of the nerve, so that a channel can be reserved for the insertion of the fusion device. Based on the above structure, since the force point of the nerve hook is on the end plate rather than on the nerve root, the nerve hook has better stability, and its position will not cause large slippage or loosening due to the insertion of the fusion device or the change of the strength of the assistant, so that the nerve root can be protected more efficiently and safely when the fusion device is inserted, and the irritation or damage to the nerve root can be reduced. At the same time, the burden of the assistant can be reduced, making it easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view schematic diagram of a nerve retractor according to an embodiment of the present invention;

[0023] Figure 2 Schematic side view of a nerve retractor according to an embodiment of the present invention.

[0024] In the figure: 1. main body; 2. tongue; 3. handle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] It should be understood that in the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0027] It should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a nerve retractor, which includes a strip-shaped main body 1, a tongue 2 provided at the front end of the main body 1, and a handle 3 provided at the rear end of the main body 1. The main body 1 and the tongue 2 are both flat, and the width T of the tongue 2 is smaller than the width H of the main body 1. When in use, the tongue 2 of the nerve retractor is first inserted into the intervertebral space from the opening of the annulus fibrosus along the expansion core matched therewith, at which time the wider main body 1 is stuck at the opening and remains outside the intervertebral space, and then the nerve retractor is rotated to block the passing root or exit root of the nerve, thereby leaving a channel for the insertion of the fusion device.

[0029] Based on the above structure, since the fulcrum of the nerve hook is on the end plate rather than on the nerve root, the nerve hook has better stability, and its position will not slip or loosen significantly due to the placement of the fusion device or changes in the assistant's strength. Therefore, when the fusion device is placed, the nerve root can be protected more efficiently and safely, reducing irritation or damage to the nerve root. At the same time, it can also reduce the burden on the assistant, making it more relaxed.

[0030] Optional, such as Figure 2 As shown, in some embodiments, one side surface of the tongue 2 is an arc surface for contacting the nerve root, and the other side surface is a plane, and the arc length accounts for one third of the circumference in the cross section of the tongue 2. Similarly, one side surface of the main body 1 is an arc surface for contacting the nerve root, and the other side surface is a plane, and the arc length accounts for one third of the circumference in the cross section of the main body 1.

[0031] Furthermore, the curved surface of the tongue 2 is on the same curved surface as the curved surface of the main body 1. In this way, the curved surface can reduce the irritation or damage to the nerve root caused by the nerve hook, thereby improving the safety of the nerve hook.

[0032] Optionally, in some embodiments, the width T of the tongue 2 is 2-8 mm, and the width H of the main body 1 is 4-12 mm. Preferably, when the width T of the tongue 2 is 3 mm, the width H of the main body 1 is 5 mm; when the width T of the tongue 2 is 6 mm, the width H of the main body 1 is 10 mm.

[0033] Optionally, in some embodiments, the length S of the tongue 2 is 25-35 mm, and the length L of the main body 1 is 110-120 mm, wherein 30 mm is a preferred length of the tongue 2 , and 115 mm is a preferred length of the main body 1 .

[0034] Optional, such as Figure 2 As shown, in some embodiments, in order to facilitate the operation of the nerve retractor, the handle 3 and the main body 1 are at a certain angle. Specifically, the angle formed by the handle 3 and the main body 1 is 120-150°, wherein 130° is the preferred angle formed by the handle 3 and the main body 1.

[0035] Optional, such as Figure 1 and Figure 2 As shown, in some embodiments, the handle 3 is flat, and its width N is greater than or equal to the width H of the main body 1, and in order to prevent slipping, the two side edges and one side surface of the handle 3 are wavy.

[0036] In summary, the embodiment of the present invention provides a nerve retractor, which includes a strip-shaped main body 1, a tongue 2 provided at the front end of the main body 1, and a handle 3 provided at the rear end of the main body 1. The main body 1 and the tongue 2 are both flat, and the width T of the tongue 2 is smaller than the width H of the main body 1. Compared with the prior art, the nerve retractor can better protect the nerve root during endoscopic decompression and fusion surgery, and is easy to use and highly safe.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A nerve retractor, characterized in that: It includes a strip-shaped main body, a tongue provided at the front end of the main body, and a handle provided at the rear end of the main body, wherein the main body and the tongue are both flat, and the width of the tongue is smaller than the width of the main body; One side surface of the tongue is an arc surface, and the other side surface is a plane, and in the cross section of the tongue, the arc length accounts for one third of the circumference; One side surface of the main body is an arc surface, and the other side surface is a plane, and in the cross section of the main body, the arc length accounts for one third of the circumference; The arc surface of the tongue portion and the arc surface of the main body portion are on the same arc surface; The handle is at a certain angle to the main body; When in use, the tongue is inserted into the intervertebral space from the opening of the annulus fibrosus along the expansion core matched therewith, while the main body remains outside the intervertebral space and is stuck in the opening.

2. The nerve retractor according to claim 1, characterized in that: The width of the tongue is 2-8 mm.

3. The nerve retractor according to claim 1, characterized in that: The width of the main body is 4-12 mm.

4. The nerve retractor according to claim 1, characterized in that: The included angle formed by the handle and the main body is 120-150°.

5. The nerve retractor according to claim 1, characterized in that: The handle is flat, and its width is greater than or equal to the width of the main body.

6. The nerve retractor according to claim 5, characterized in that: The two side edges and one surface of the handle are both wavy.

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