Nerve root retractor for UBE spine endoscopic surgery

Abstract

The utility model discloses a nerve root draw hook for UBE spine endoscopic surgery, which comprises a draw hook handheld part and a draw hook operating part which are detachably connected in a matched manner, the draw hook operating part comprises a connecting part detachably matched with the draw hook handheld part, a side wall part with one end part connected with the connecting part, and a draw hook part with one end part connected with the side wall part, the side wall part is provided with a side wall fixing hole which extends along the side wall and is used for assembling a kirschner wire, the kirschner wire is movably assembled in the side wall fixing hole, and the upper part of the side wall part is provided with a plurality of groups of limiting bayonets which are uniformly arranged along the side wall part and are used for tightening the kirschner wire; a plurality of fixing rings which are matched with the limiting bayonets and are used for tightening kirschner wires are arranged at the upper part of the side wall part; according to the utility model, the condition that the surgical operation is influenced by the activity of the nerve drag hook is avoided, the conditions that the space of a main knife and an assistant is small and the main knife and the assistant interfere with each other under the condition that a minimally invasive channel is small are reduced, the risk of minimally invasive surgery is reduced, the device is more suitable for minimally invasive spine surgery, and the influence on the surgical field is reduced.

Description

Technical Field

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

[0002] The UBE technique (Unilateral Biportal Endoscopy Technique) is a technique suitable for degenerative lesions of the cervical, thoracic, and lumbar spine. It is gaining increasing attention due to its combination of the magnified visual field of an endoscope and the flexible operation of open surgery, the use of conventional transforaminal endoscopic instruments and open spinal surgical instruments, minimal muscle damage, and less fluoroscopy. When using the UBE technique for spinal surgery, a nerve retractor is required to retract the dura mater and nerve roots to fully expose the area to be operated on and to avoid nerve damage during surgery.

[0003] Currently, the minimally invasive channel of UBE spinal endoscopic surgery is relatively small. During the operation, the nerve retractor needs to be fixed through manual traction or the assistance of other surgical instruments. However, the manual traction process is prone to shaking, which affects the surgical operation. When the space between the surgeon and the assistant is small, fixing with other instruments will reduce the operating space, affect the surgical field of view, and cause mutual interference between the surgeon and the assistant, increasing the risk of minimally invasive surgery. Utility Model Content

[0004] The purpose of the present utility model is to provide a nerve root retractor for UBE spinal endoscopic surgery to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical means:

[0006] A nerve root retractor for UBE spinal endoscopic surgery comprises a retractor handpiece and a retractor operating part which are detachably connected. The retractor operating part comprises a connecting part which is detachably matched with the retractor handpiece, a side wall part connected to the connecting part at one end, and a retractor part connected to the side wall part at one end. The side wall part is provided with a side wall fixing hole which extends along the side wall and is used for assembling a Kirschner wire. A Kirschner wire is movably assembled in the side wall fixing hole. The upper part of the side wall part is provided with a plurality of limiting snap-fits which are evenly arranged along the side wall part and are used for tightening the Kirschner wire. The upper part of the side wall part is provided with a plurality of fixing rings which cooperate with the limiting snap-fits and are used for tightening the Kirschner wire.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] The utility model provides a nerve root retractor for UBE spinal endoscopic surgery. During the surgery, after the retractor is placed, the Kirschner wire is passed through the side wall fixing hole so that the distal tip of the Kirschner wire is inserted into the cone to fix it. Then the fixing ring is adjusted to fix the Kirschner wire and the retractor operating part together so that the two are connected as one. In this way, the assistant does not need to continuously manually pull the nerve retractor during the entire surgery. The retractor can be well fixed, avoiding the situation where the surgical operation is affected by the movement of the nerve retractor, reducing the situation where the space between the surgeon and the assistant is small when the minimally invasive channel is small, and mutual interference is reduced, thereby reducing the risk of minimally invasive surgery, making the grip more stable, more suitable for minimally invasive spinal surgery, and reducing the impact on the surgical field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the product structure in the embodiment of the utility model;

[0010] Figure 2 For the embodiment of the utility model Figure 1 A schematic diagram of the structure at center A;

[0011] Figure 3 This is a schematic diagram of the structure of a part of the product in the embodiment of the utility model;

[0012] Figure 4 For the embodiment of the utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0013] Figure 5 This is a schematic diagram of the top view of the structure of the retractor hand-held portion and the retractor operating portion in the embodiment of the present utility model;

[0014] Figure 6 For the embodiment of the utility model Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle;

[0015] Figure 7 This is a schematic diagram of the structure of the Kirschner wire in the embodiment of the present utility model;

[0016] Figure 8 For the embodiment of the utility model Figure 7 Enlarged schematic diagram of the structure at point C in the middle. DETAILED DESCRIPTION

[0017] The following detailed description of the embodiments of the technical solution of this application is provided in conjunction with the accompanying drawings. The following embodiments and drawings are intended only to more clearly illustrate the technical solution of this application and are therefore provided as examples only and are not intended to limit the scope of protection of this application. The accompanying drawings schematically illustrate only the parts relevant to the technical solution of this application and do not represent the actual structure of the product.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0019] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0020] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0022] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0023] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0024] The UBE technique (Unilateral Biportal Endoscopy Technique) is a technique suitable for degenerative lesions of the cervical, thoracic, and lumbar spine. It is gaining increasing attention due to its combination of the magnified visual field of an endoscope and the flexible operation of open surgery, the use of conventional transforaminal endoscopic instruments and open spinal surgical instruments, minimal muscle damage, and less fluoroscopy. When using the UBE technique for spinal surgery, a nerve retractor is required to retract the dura mater and nerve roots to fully expose the area to be operated on and to avoid nerve damage during surgery.

[0025] Currently, the minimally invasive channel of UBE spinal endoscopic surgery is relatively small. During the operation, the nerve retractor needs to be fixed through manual traction or the assistance of other surgical instruments. However, the manual traction process is prone to shaking, which affects the surgical operation. When the space between the surgeon and the assistant is small, fixing with other instruments will reduce the operating space, affect the surgical field of view, and cause mutual interference between the surgeon and the assistant, increasing the risk of minimally invasive surgery.

[0026] In this embodiment, a nerve root retractor for UBE spinal endoscopic surgery includes a retractor handheld portion 1 and a retractor operating portion 2 that are detachably connected. The retractor operating portion 2 includes a connecting portion 21 that is detachably connected to the retractor handheld portion 1, a side wall portion 22 connected to the connecting portion 21 at one end, and a retractor portion 23 connected to the side wall portion 22 at one end. The side wall portion 22 is provided with a side wall fixing hole 24 extending along the side wall and used to assemble a Kirschner wire 3. The Kirschner wire 3 is movably assembled in the side wall fixing hole 24. The upper portion of the side wall portion 22 is provided with a plurality of groups of limiting bayonets 25 that are evenly arranged along the side wall portion 22 and used to tighten the Kirschner wire 3. The upper portion of the side wall portion 22 is equipped with a plurality of limiting bayonets 25 that cooperate with the limiting bayonets 25 and are used to tighten the Kirschner wire 3's fixing ring 26; the utility model provides a nerve root retractor for UBE spinal endoscopic surgery. During the operation, after the retractor is placed, the Kirschner wire 3 is passed through the side wall fixing hole 24 so that the distal tip of the Kirschner wire 3 is inserted into the cone to fix it, and then the fixing ring 26 is adjusted to fix the Kirschner wire 3 and the retractor operating part 2 together so that the two are connected as one. In this way, there is no need for the assistant to continuously manually pull the nerve retractor during the entire operation, and it can be well fixed, avoiding the situation where the surgical operation is affected by the movement of the nerve retractor, reducing the situation where the space between the surgeon and the assistant is small when the minimally invasive channel is small, and interfering with each other, reducing the risk of minimally invasive surgery, making the grip more stable, more suitable for minimally invasive spinal surgery, and reducing the impact on the surgical field.

[0027] In a possible embodiment of the present invention, the retractor hand-held portion 1 is a conventional handle, and the handle structure can be as disclosed in the accompanying drawings. Its material can be made of medical plastic, wood, etc. The handle and the retractor operating portion 2 are detachable and can be combined by damping plug-in or other auxiliary parts for fixing, so that the retractor operating portion 2 of different lengths can be replaced in practice and can be applied to minimally invasive channels of various depths.

[0028] In a possible embodiment of the present invention, the retractor operating portion 2 includes a connecting portion 21, a side wall portion 22, and a retractor portion 23. One end of the connecting portion 21 is detachably connected to the retractor handheld portion 1;

[0029] In this embodiment, the connection between the connecting portion 21 and the side wall portion 22, and the connection between the side wall portion 22 and the hook portion 23 are all smoothly transitioned. One end of the side wall portion 22 is connected to the connecting portion 21, and the other end of the side wall portion 22 is connected to the hook portion 23. The connecting portion 21, the side wall portion 22, and the hook portion 23 are integrally arranged. The side wall portion 22 is a rod with a horizontal cross-section diameter that gradually decreases from top to bottom, so that the side wall portion 22 is larger at the top and smaller at the bottom, which can well adapt to the minimally invasive channel and provide a better surgical field of view for the main surgeon;

[0030] In this embodiment, a side wall fixing hole 24 is provided on the side wall portion 22, which extends along the central axis of the side wall and is used to assemble the Kirschner wire 3. The central axis of the side wall fixing hole 24 is not in the same straight line as the central axis of the side wall portion 22, and the diameter of the side wall fixing hole 24 is larger than the cross-sectional diameter of the bottom of the side wall portion 22, and smaller than the cross-sectional radius of the top of the side wall portion 22. In this way, since the diameter of the side wall portion 22 gradually decreases smoothly from top to bottom, the side wall fixing hole 24 is provided, so that the relative outer portion of the lower portion of the side wall portion 22 is gradually cut away, so that the Kirschner wire 3 can be gradually exposed, which is convenient for observing the insertion position of the Kirschner wire 3 into the cone, and a fixing channel for assembling the Kirschner wire 3 is left at the upper portion of the side wall portion 22. In the drawings of this embodiment, the central axis of the side wall fixing hole 24 is vertically arranged, so that there is a certain angle between the Kirschner wire 3 and the side wall portion 22 and the retractor portion 23, which is convenient for inserting the Kirschner wire 3 and is conducive to fixing the retractor angle;

[0031] In the above embodiment, the side wall fixing hole 24 opened can only be equipped with a Kirschner wire 3 that is adapted to the diameter of the side wall fixing hole 24. The assembled Kirschner wire 3 cannot fix it and the retractor operating part 2 together, and this is especially true for other Kirschner wires 3 with diameters smaller than the diameter of the side wall fixing hole 24. In order to enable the side wall fixing hole 24 to be adapted to the Kirschner wire 3 with its aperture or other specifications smaller than the diameter of the side wall fixing hole 24, the utility model also provides other embodiments. In this embodiment, in order to solve the problem of the side wall fixing hole 24 being adapted to the Kirschner wire 3 and fixed on the retractor operating part 2, the upper part of the side wall part 22 is provided with a plurality of groups of limit bayonets that are evenly arranged along the side wall part 22 and used to tighten the Kirschner wire 3. 25, and some of the limiting bayonet 25 are respectively provided with a fixing ring 26 for tightening the Kirschner wire 3. Through the limiting bayonet 25, a number of gaps communicating with the outside are present in the side wall fixing hole 24, and the Kirschner wire 3 can be tightened on the inner wall of the side wall fixing hole 24 through the fixing ring 26. In this embodiment, referring to the accompanying drawings, the fixing ring 26 adopts a throat clamp as a structural member, and through the throat clamp, it is effectively matched with the limiting bayonet 25, and can quickly tighten the Kirschner wire 3, so that the Kirschner wire 3 and the retractor operating part 2 are fixed together, and the two are connected as one, so that during the entire operation, there is no need for an assistant to continue to manually pull the nerve retractor, and it can be well fixed.

[0032] In a possible embodiment of the present invention, an outer side portion of the fixed channel provided on the upper portion of the side wall portion 22 is provided with an observation port 221 penetrating through each limiting snap-in 25 along its axis, so that a symmetrical tooth-shaped notch is formed on the outer side portion of the fixed channel under the cooperation of the observation port 221 and each limiting snap-in 25, making it easier to fix the Kirschner wire 3 on the retractor operating portion 2 using a fixing ring 26 of a throat clamp structure.

[0033] In a possible embodiment of the present invention, a slot 31 is provided on the upper portion of the Kirschner wire 3, and raised strips 32 are respectively provided on both sides of the slot 31 extending along the axis of the Kirschner wire 3. In this way, the Kirschner wire 3 is fixed to the inner wall of the side wall fixing hole 24 together with the throat clamp, and the Kirschner wire 3 and the retractor operating part 2 are stably matched.

[0034] The specific embodiments disclosed in the present utility model fall within the scope of protection of the claims of the present utility model, and are the specific lower implementation scope of the characteristic part of the present utility model. The protection content of the specific embodiments is merely an explanation of the protection scope of the claims of the present utility model. The protection scope of the present utility model is not limited to the protection content of the specific embodiments, and the protection content of the specific embodiments should not be understood as a limitation on the protection scope of the claims of the present utility model.

Claims

1. A nerve root retractor for UBE spinal endoscopic surgery, characterized by: The utility model comprises a retractor hand-held part (1) and a retractor operating part (2) which are detachably connected. The retractor operating part (2) comprises a connecting part (21) which is detachably connected to the retractor hand-held part (1), a side wall part (22) whose one end is connected to the connecting part (21), and a retractor part (23) whose one end is connected to the side wall part (22). The side wall part (22) is provided with a side wall fixing hole (24) which extends along the side wall and is used to assemble a Kirschner wire (3). The Kirschner wire (3) is movably assembled in the side wall fixing hole (24). The upper part of the side wall part (22) is provided with a plurality of groups of limiting bayonets (25) which are evenly arranged along the side wall part (22) and are used to tightly clamp the Kirschner wire (3). The upper part of the side wall part (22) is provided with a plurality of fixing rings (26) which cooperate with the limiting bayonets (25) and are used to tightly clamp the Kirschner wire (3).

2. The nerve root retractor for UBE spinal endoscopic surgery according to claim 1, characterized in that: The connection parts of the connecting part (21) and the side wall part (22), and the connection parts of the side wall part (22) and the hook part (23) are all smoothly transitioned. One end of the side wall part (22) is connected to the connecting part (21), and the other end of the side wall part (22) is connected to the hook part (23). The connecting part (21), the side wall part (22), and the hook part (23) are integrally arranged. The side wall part (22) is a rod with a horizontal cross-section diameter that gradually decreases from top to bottom.

3. The nerve root retractor for UBE spinal endoscopic surgery according to claim 2, characterized in that: The central axis of the side wall fixing hole (24) is not on the same straight line as the central axis of the side wall portion (22), and the diameter of the side wall fixing hole (24) is larger than the diameter of the bottom section of the side wall portion (22) and smaller than the radius of the top section of the side wall portion (22).

4. The nerve root retractor for UBE spinal endoscopic surgery according to claim 2, characterized in that: An observation port (221) penetrating each position-limiting bayonet (25) is provided along the axis of the outer side of the fixed channel provided on the upper portion of the side wall portion (22).

5. The nerve root retractor for UBE spinal endoscopic surgery according to claim 1, characterized in that: A clamping groove (31) is provided on the upper portion of the Kirschner wire (3), and raised strips (32) are respectively provided on both sides of the clamping groove (31) extending along the axis of the Kirschner wire (3).

6. The nerve root retractor for UBE spinal endoscopic surgery according to claim 1, characterized in that: The fixing ring (26) is a throat hoop.

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