Nerve root retractor for lumbar surgery

Abstract

The nerve root drag hook for the lumbar surgery comprises a hook rod, one end of the hook rod is connected with a hook mouth, and the other end of the hook rod is connected with a hook handle. The hook mouth comprises two duckbilled hook pieces, and the included angle between the two hook pieces is an obtuse angle. The hook rod is of an L-shaped structure, and the included angle of the L-shaped structure is an obtuse angle. The included angle between the two duckbilled hook pieces is an obtuse angle, and is used for retracting an epidural sac, epidural fat and nerve roots and stopping bleeding by compression, so that the nerve roots can be effectively shielded, and the technical defect that part of the nerve roots are exposed in the visual field and are accidentally injured due to variation or edema is avoided; the included angle between the hook rod and the hook handle is an obtuse angle, so that the visual field of a main knife is prevented from being shielded when an assistant assists, and the problem that the nerve root hook in the prior art shields the sight of an operator and a first assistant is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a nerve root retractor for lumbar vertebrae surgery. Background Art

[0002] The nerve root retractor is mainly used in posterior lumbar discectomy + interbody fusion surgery. It is used by the first assistant to retract the nerve root to ensure sufficient space for fusion cage placement.

[0003] Currently, the hook rod and handle of most nerve root retractors are at right angles, which has the following technical defects: the nerve root retractors in the existing technology only pull the dura mater to protect the nerve root. At the same time, the right-angle route causes vision obstruction, which blocks the vision of the operator and the first assistant.

[0004] The primary purpose of nerve root retractors is to pull the dura mater, forcing the nerve roots to the opposite side of the surgeon's body, thereby preventing nerve damage during intervertebral fusion cage insertion. However, this device suffers from technical drawbacks: it cannot effectively shield the nerve roots, leaving some exposed due to variations or edema, potentially causing accidental injury. This hinders the surgeon's ability to effectively protect the dura mater and nerve roots during intervertebral fusion cage insertion.

[0005] Therefore, how to design a nerve root retractor for lumbar surgery has become a problem that needs to be solved urgently. Utility Model Content

[0006] In view of the problems existing in the prior art, the present invention provides a nerve root retractor for lumbar spine surgery to solve at least one of the above technical problems.

[0007] The technical solution of the utility model is: a nerve root retractor for lumbar spine surgery, comprising a hook rod, one end of the hook rod is connected to a hook mouth, and the other end of the hook rod is connected to a hook handle; the hook mouth comprises two duckbill-shaped hook pieces, and the angle between the two hook pieces is an obtuse angle; the hook rod is an L-shaped structure, and the angle of the L-shaped structure is an obtuse angle.

[0008] The utility model adopts an obtuse angle between two duckbill-shaped hook pieces, which are used to retract the dura mater, epidural fat and nerve roots, and compress and stop bleeding. One hook piece blocks the dura mater, and the other hook piece blocks the nerve roots, which can effectively block the nerve roots, which is conducive to effectively avoiding nerve damage and avoiding the technical defect that some nerve roots are exposed to the field of vision and accidentally injured due to variation or edema; the obtuse angle between the hook rod and the hook handle is adopted, which is conducive to preventing the assistant from blocking the main surgeon's field of vision when assisting, providing more visual space for the surgeon's operation, and solving the problem of the nerve root retractor in the existing technology blocking the sight of the surgeon and the first assistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] Figure 2 This is a schematic diagram of the use state of the utility model.

[0011] In the figure: 1. Hook mouth; 2. Hook shaft; 3. Hook handle; 4. Friction lines; 5. Nerve root; 6. Intervertebral disc; 7. Dural sac. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] See Figure 1-2 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the conditions for the implementation of this utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0014] Example 1: A nerve root retractor for lumbar spine surgery, referring to Figure 1 , comprising a hook rod 2, one end of which is connected to a hook mouth 1, and the other end of which is connected to a hook handle 3; the hook mouth 1 comprises two duckbill-shaped hook pieces, the angle between which is an obtuse angle; the hook rod 2 is an L-shaped structure, the angle between which is an obtuse angle. The utility model adopts an obtuse angle between the two duckbill-shaped hook pieces, which is used to retract the dura mater, epidural fat and nerve roots, and to compress and stop bleeding. One hook piece blocks the dura mater, and the other hook piece blocks the nerve roots, which can effectively block the nerve roots, thereby effectively avoiding nerve damage and avoiding the technical defect that some nerve roots are exposed to the field of vision due to variation or edema and are accidentally injured; the obtuse angle between the hook rod and the hook handle is adopted, which is conducive to preventing the assistant from blocking the main surgeon's field of vision when assisting, providing more visual space for the surgeon to operate, and solving the problem of the existing nerve root retractor blocking the surgeon and the first assistant's field of vision.

[0015] Example 2: Based on Example 1, the angle between the two hooks is 120°. This utility model uses two duckbill-shaped hooks with an angle of 120° between them to retract the dura mater, epidural fat, and nerve roots, and to compress and stop bleeding. One hook covers the dura mater, while the other covers the nerve roots. This effectively blocks the nerve roots, helps to effectively avoid nerve damage, and avoids the technical defect that some nerve roots are exposed to the field of vision due to variation or edema and are accidentally injured.

[0016] Example 3: Based on Example 1, the angle of the L-shaped structure is 120°. This utility model adopts a 120° angle between the hook rod and the hook handle, which helps prevent the assistant from blocking the surgeon's field of view, provides more visual space for the surgeon to operate, and solves the problem of existing nerve root retractors blocking the surgeon and the first assistant's field of view.

[0017] Embodiment 4: Based on embodiment 1, the outer ring of the middle portion of the hook handle 3 is provided with friction lines 4. The friction lines of the utility model help assistants to hold the hook effectively, are convenient for fingers to hold, are not easy to rotate or slide, and avoid displacement caused by vibration.

[0018] Example 5: Based on Example 1, each of the hooks has a blunt, smooth tip and measures 0.8 cm wide by 1.5 cm long. This invention utilizes a blunt, smooth hook to retract the dural sac, epidural fat, and nerve roots, providing compression and hemostasis. One hook shields the dural sac, while the other shields the nerve roots. This effectively shields the nerve roots, helping to prevent nerve damage and avoiding the technical drawback of accidental injury caused by partial nerve root exposure due to variation or edema.

[0019] Example 6, Reference Figure 2 During the insertion of the intervertebral fusion cage, the first assistant uses a nerve root retractor to retract the dura mater 7 and the nerve root 5. This nerve root retractor can simultaneously block the dura mater 7 and the nerve root 5 to prevent nerve damage during the insertion of the fusion cage. At the same time, since the hook rod 2 and the hook handle 3 are at 120 degrees, the problem of the surgeon's vision being blocked is greatly solved. The friction pattern 4 on the hook handle 3 helps the assistant to effectively hold the cage and avoid displacement caused by vibration.

[0020] 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 modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A nerve root retractor for lumbar spine surgery, comprising a hook rod (2), characterized in that: One end of the hook rod (2) is connected to the hook mouth (1), and the other end of the hook rod (2) is connected to the hook handle (3); the hook mouth (1) includes two duckbill-shaped hook pieces, and the angle between the two hook pieces is an obtuse angle; the hook rod (2) is an L-shaped structure, and the angle of the L-shaped structure is an obtuse angle.

2. The nerve root retractor for lumbar spine surgery according to claim 1, characterized in that: The included angle between the two hook pieces is 120°.

3. The nerve root retractor for lumbar spine surgery according to claim 1, characterized in that: The included angle of the L-shaped structure is 120°.

4. The nerve root retractor for lumbar spine surgery according to claim 1, characterized in that: The middle outer ring of the hook handle (3) is provided with friction patterns (4).

5. The nerve root retractor for lumbar spine surgery according to claim 1, characterized in that: Any of the hook pieces has a blunt and smooth tip and measures 0.8 cm in width and 1.5 cm in length.

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