Nerve retractor
By designing a nerve retractor with a fixed support, and using the skin to abut and fix the nerve retractor, the problem of decreased stability caused by hand fatigue during surgery is solved, and nerve root tremors and damage are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-03-03
AI Technical Summary
During lumbar interbody fusion surgery, the stability of the nerve retractor may decrease due to operator fatigue and lack of strength, leading to nerve root tremors and damage.
A neural hook was designed, comprising a handle, a lever, a hook, and a fixing bracket. The bracket body slides to the skin in the unlocked state and is fixed in the locked state. It uses skin support to reduce hand strain and prevent tremors.
By fixing the support to the skin, the tremors of the nerve retractor caused by hand fatigue are reduced, the risk of nerve root damage is lowered, and the stability of the surgery is improved.
Smart Images
Figure CN223958839U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and more specifically to a nerve retractor. Background Technology
[0002] In lower lumbar interbody fusion surgery, two channels are typically created on the surgical site: an instrument channel and an observation channel. The instrument channel is used to insert a nerve retractor to retract the nerve root. The observation channel is used to insert an endoscope to observe the operation of the nerve retractor within the instrument channel.
[0003] Typically, nerve retractors are operated by hand by the surgeon. After retracting the nerve root, the surgeon needs to maintain the stability of the nerve root's position, which requires the surgeon to rely on hand strength to maintain the stability of the nerve retractor's position. However, during this process, the surgeon's hand is prone to tremors, causing the nerve retractor to repeatedly pull on the nerve root, resulting in nerve root damage.
[0004] Therefore, how to suppress the shaking caused by decreased stability due to hand fatigue and lack of strength of the surgical operator during the use of the nerve retractor remains a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] In view of this, in order to solve the above-mentioned technical problems, this application provides a neural retractor, which includes:
[0006] handle part;
[0007] A lever, one end of which is connected to a handle.
[0008] A hook is located at the end of the lever furthest from the handle.
[0009] The bracket includes a bracket body and an adjusting member; the bracket body is slidably mounted on the pull rod so as to be able to slide along the length of the pull rod; the adjusting member is movably mounted on the bracket body so that the bracket body can switch between a locked state and an unlocked state.
[0010] The locked state includes the adjusting member locking the bracket body to the pull rod to prevent the bracket body from sliding relative to the pull rod; the unlocked state includes the adjusting member releasing the bracket body from the pull rod to allow the bracket body to slide relative to the pull rod.
[0011] Beneficial effects: Unlike existing technologies, in this application, when the surgical operator holds the nerve retractor to pull the nerve root to the predetermined position, the support body is first slid along the length of the pull rod while the support body is in the unlocked state. This allows the support body to move to contact the patient's skin for support. At this point, adjusting the adjustment mechanism switches the support body to the locked state, allowing the support body to assist the surgical operator in fixing the position of the nerve retractor. The contact between the support body and the patient's skin reduces the strain on the surgical operator's hands and suppresses shaking caused by hand fatigue and weakness during use. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the neural retractor of the first embodiment of this application;
[0013] Figure 2 This is a schematic diagram of a fixing bracket according to an embodiment of this application;
[0014] Figure 3 yes Figure 1 Dimensioning diagram;
[0015] Figure 4 This is a schematic diagram of the neural retractor according to the second embodiment of this application;
[0016] Figure 5 This is a schematic diagram of the neural retractor according to the third embodiment of this application;
[0017] Figure 6 This is a schematic diagram of the neural retractor according to the fourth embodiment of this application.
[0018] Explanation of reference numerals in the attached figures;
[0019] Nerve hook 10; handle 100; pull rod 200; first rod segment 210; second rod segment 220; screw clearance hole 201; hook 300; fixed bracket 400; bracket body 410; screw 411; forked part 412; support foot 4121; tilting rod 41211; bottom foot 41212; clearance space 4122; first support foot 4121a; second support foot 4121b; adjusting part 420; first nut 421; second nut 422; peeling head 500; bending part 600; first included angle α; first length d1; second length d2; first dimension d3; third length d4. Detailed Implementation
[0020] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] Please see Figure 1 and Figure 2 As shown, the nerve retractor 10 of this application includes a handle portion 100, a lever 200, a hook 300, and a fixation bracket 400.
[0022] The handle 100 is for hand gripping. One end of the lever 200 is connected to the handle 100, and at least a portion of the lever 200 is used to extend into the instrument channel. A hook 300 is disposed at the end of the lever 200 away from the handle 100 for traction of nerve roots within the instrument channel. The fixation bracket 400 includes a bracket body 410 and an adjustment member 420. The bracket body 410 is slidably disposed on the lever 200 to allow sliding along the length of the lever 200. The adjustment member 420 is movably disposed on the bracket body 410 to allow the bracket body 410 to switch between a locked state and an unlocked state.
[0023] The locked state includes the adjusting member 420 locking the bracket body 410 to the pull rod 200 to prevent the bracket body 410 from sliding relative to the pull rod 200. The unlocked state includes the adjusting member 420 releasing the bracket body 410 from the pull rod 200 to allow the bracket body 410 to slide relative to the pull rod 200.
[0024] In this manner, when the surgeon holds the nerve retractor 10 and uses the retractor 300 to pull the nerve root to the predetermined position, the support body 410 is first slid along the length of the pull rod 200 while the support body 410 is in the unlocked state. This allows the support body 410 to move until it contacts the skin of the surgical patient, providing support. At this point, the adjustment mechanism 420 switches the support body 410 to the locked state, allowing the support body 410 to assist the surgeon in fixing the position of the nerve retractor 10. The contact between the support body 410 and the skin of the surgical patient reduces the strain on the surgeon's hand and suppresses shaking caused by hand fatigue and weakness during use of the nerve retractor 10.
[0025] Optionally, such as Figures 1-2As shown, the nerve retractor 10 includes a dissecting head 500, which is disposed at the end of the lever 200 away from the handle portion 100. The dissecting head 500 protrudes from the side of the retractor 300 opposite to the handle portion 100 and is used to insert between the soft tissue and the nerve root to separate the soft tissue and the nerve root.
[0026] In this manner, the dissection head 500 can be inserted between the soft tissue and the nerve root before the retractor 300, so as to open the soft tissue and the nerve root, thereby allowing the retractor 300 to extend between the soft tissue and the nerve root, so as to pull the nerve root to the determined position through the retractor 300.
[0027] Optionally, such as Figures 1-2 As shown, the pull rod 200 is provided with a screw clearance hole 201, which extends into a strip shape along the length of the pull rod 200. The bracket body 410 includes a screw 411 and a forked portion 412.
[0028] The screw 411 passes through the screw clearance hole 201, and the screw clearance hole 201 can avoid the screw 411 along the length direction of the pull rod 200, so that the screw 411 is slidably disposed in the screw clearance hole 201. The forked portion 412 is disposed at one end of the screw 411 and includes multiple support legs 4121. The multiple support legs 4121 are respectively connected to the screw 411 and are distributed at intervals around the axis of the screw 411 to form a clearance space 4122.
[0029] The adjusting member 420 includes a first nut 421 and a second nut 422, which are threadedly connected to the screw 411 and clamp the pull rod 200 to lock the bracket body 410 onto the pull rod 200. The first nut 421 and the second nut 422 can be rotated relative to the screw 411 to loosen the pull rod 200, so that the bracket body 410 can be released from the pull rod 200.
[0030] Through the above methods, this application has at least the following three beneficial effects. First, by manually rotating the first nut 421 and the second nut 422, the stent body 410 can be switched between a locked state and an unlocked state. Second, compared to using an electric adjustment device to switch the locked and unlocked states of the stent body 410, the first nut 421 and the second nut 422 are smaller, which is more conducive to the miniaturization and portability of the nerve retractor 10. Third, rotating the first nut 421 and the second nut 422 can move the screw 411 relative to the pull rod 200 towards or away from the bifurcation 412, and can adjust the length of the screw 411 on the side of the pull rod 200 near the bifurcation 412, thereby allowing the stent body 410 to adapt to different height differences between the pull rod 200 and the skin of the surgical subject.
[0031] It should be noted that in other examples (not shown in the figure), the screw clearance hole 201 may not be provided on the pull rod 200, and a slider may be slidably provided on the pull rod 200. The bracket body 410 is fixed to the slider, so the bracket body 410 can be slidably set on the pull rod 200 through the slider. In this case, the adjusting member 420 can be an adjusting bolt. The adjusting bolt extends into the slider and is threadedly connected to the slider, and presses against the pull rod 200 to prevent the bracket body 410 from sliding relative to the pull rod 200. Rotating the adjusting bolt can disengage the adjusting bolt from the pull rod 200, so that the bracket body 410 can slide relative to the pull rod 200.
[0032] Optionally, such as Figures 1-2 As shown, the support legs 4121 of the forked portion 412 are divided into a first support leg 4121a and a second support leg 4121b. The first support leg 4121a and the second support leg 4121b are distributed on opposite sides about the axis of the screw 411, so that the bracket body 410 is formed in a Y shape.
[0033] The screw clearance hole 201 can circumferentially avoid the screw 411, so that when the first nut 421 and the second nut 422 move away from the screw 411 to loosen the pull rod 200, the screw 411 can rotate relative to the pull rod 200, so that the first support leg 4121a and the second support leg 4121b can rotate around the axis of the screw 411.
[0034] By rotating the screw 411 relative to the pull rod 200, the first support leg 4121a and the second support leg 4121b can rotate around the axis of the screw 411, thereby adjusting the position of the contact point of the support leg 4121 of the Y-shaped support body 410 on the skin of the surgical subject, so that the Y-shaped support body 410 can better abut against the skin of the surgical subject.
[0035] Optionally, such as Figures 1-2 As shown, the support leg 4121 includes an inclined rod 41211 and a base 41212.
[0036] One end of the tilting rod 41211 is connected to the screw 411. The tilting rod 41211 is tilted relative to the axis of the screw 411, and the other end of the tilting rod 41211 extends away from the screw 411. The foot 41212 is located at the end of the tilting rod 41211 away from the screw 411, and the foot 41212 is bent outward from the axis of the tilting rod 41211 away from the screw 411.
[0037] In this manner, since the base 41212 is bent outward toward the axis of the inclined rod 41211 away from the screw 411, the base 41212 contacts the skin of the surgical subject, so that the support body 410 and the skin of the surgical subject have a more sufficient contact area, thereby reducing or avoiding damage to the skin of the surgical subject.
[0038] Optionally, such as Figure 2 As shown, the angle between the inclined rod 41211 of the first support leg 4121a and the inclined rod 41211 of the second support leg 4121b is a first included angle α, which can be 45° to 75°, but is not limited to this. For example, the first included angle α can be 45°, 60°, or 75°. Optionally, the length of the inclined rod 41211 of the support leg 4121 can be a third length d4, which can be 1.5cm to 2.5cm, but is not limited to this. For example, the third length d4 can be 1.5cm, 2cm, or 2.5cm.
[0039] Alternatively, in some embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the hook 300 and the forked portion 412 are located on the same side of the lever 200, thus facilitating the contact of the forked portion 412 with the skin of the surgical subject. Furthermore, the hook 300, the forked portion 412, and the handle portion 100 can be located on the same side of the lever 200. Figure 1 , Figure 4 and Figure 5 As shown, the nerve retractor 10 includes a bent portion 600, which is disposed at one end of the lever 200 near the handle portion 100, and the bent portion 600 is bent relative to the lever 200 toward the side where the handle portion 100 is located. The end of the lever 200 near the handle portion 100 is connected to the handle portion 100 through the bent portion 600.
[0040] Alternatively, in other embodiments, such as Figure 6 As shown, the hook 300 and the fork 412 are located on the same side of the lever 200, and the lever 200 and the handle 100 are arranged along the length of the lever 200.
[0041] Optionally, such as Figures 1-2 As shown, the pull rod 200 includes a first rod segment 210 and a second rod segment 220. One end of the first rod segment 210 is connected to the handle portion 100, and a screw clearance hole 201 is provided in the first rod segment 210. One end of the second rod segment 220 is connected to the end of the first rod segment 210 away from the handle portion 100.
[0042] The first rod segment 210 and the second rod segment 220 are separated by the end of the screw clearance hole 201 away from the handle portion 100. The hook 300 is provided at the end of the second rod segment 220 away from the first rod segment 210. The peeling head 500 is provided at the end of the second rod segment 220 away from the first rod segment 210.
[0043] In this manner, the second rod segment 220 extends into the mechanical channel so that the stripping head 500 and the hook 300 are located within the instrument channel. The first rod segment 210 may remain at least partially outside the instrument channel so that the support body 410 can slide along the screw clearance hole 201.
[0044] For example, rather than limiting, in combination Figure 1 See Figure 3 As shown, the length of the screw clearance hole 201 is a first length d1, which is 6~10cm. For example, the first length d1 is 6cm, 8cm, or 10cm. The length of the second rod segment 220 is a second length d2, which is 1.5~2.5cm. For example, the second length d2 is 1.5cm, 2cm, or 2.5cm. The dimension of the peeling head 500 along the length direction of the pull rod 200 is a first dimension d3, which is 0.3~0.7cm. For example, the first dimension d3 is 0.3cm, 0.5cm, or 0.7cm. Schematic, the first length d1 can be 8cm, the second length d2 can be 2cm, and the first dimension d3 can be 0.5cm.
[0045] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. A neuro-puller characterized by, The neural retractor comprises: a handle portion; a pull rod, one end of which is connected to the handle portion; a retractor, which is arranged at the end of the pull rod away from the handle portion; and a fixing support, which comprises a support body and an adjusting member; the support body is slidingly arranged on the pull rod so as to be able to slide along the length direction of the pull rod; the adjusting member is movably arranged on the support body so as to enable the support body to be switched between a locked state and an unlocked state; wherein the locked state comprises that the adjusting member locks the support body on the pull rod so as to prevent the support body from sliding relative to the pull rod; the unlocked state comprises that the adjusting member releases the support body from the pull rod so as to enable the support body to slide relative to the pull rod; the neural retractor comprises a stripping head, which is arranged at the end of the pull rod away from the handle portion; and the stripping head is protrusively arranged towards the side of the retractor away from the handle portion.
2. The neuro-puck of claim 1, wherein, the pull rod is provided with a screw rod avoiding hole, which is elongated in the length direction of the pull rod; the support body comprises: a screw rod, which is arranged in the screw rod avoiding hole, and the screw rod avoiding hole can avoid the screw rod in the length direction of the pull rod, so that the screw rod is slidingly arranged in the screw rod avoiding hole; and a bifurcated portion, which is arranged at one end of the screw rod and comprises a plurality of supporting legs, which are respectively connected to the screw rod and are distributed around the axis of the screw rod so as to enclose an avoiding space; wherein the adjusting member comprises a first nut and a second nut, which are threadedly connected to the screw rod and clamp the pull rod so as to lock the support body on the pull rod; the first nut and the second nut can be rotated relative to the screw rod so as to release the pull rod, thereby releasing the support body from the pull rod.
3. The neuro-puck of claim 2, wherein, the pull rod comprises a first rod segment and a second rod segment, one end of the first rod segment is connected to the handle portion, and the screw rod avoiding hole is arranged on the first rod segment; one end of the second rod segment is connected to the end of the first rod segment away from the handle portion; wherein the first rod segment and the second rod segment are demarcated by the end of the screw rod avoiding hole away from the handle portion; the retractor is arranged at the end of the second rod segment away from the first rod segment; the second rod segment is further provided with a stripping head at the end thereof away from the first rod segment, and the stripping head is protrusively arranged towards the side of the retractor away from the handle portion.
4. The neuro-puck of claim 3, wherein, the length of the screw rod avoiding hole is a first length, which is 6-10 cm; the length of the second rod segment is a second length, which is 1.5-2.5 cm; the size of the stripping head in the length direction of the pull rod is a first size, which is 0.3-0.7 cm.
5. The neuro-puck of claim 2, wherein, the supporting legs of the bifurcated portion are divided into first supporting legs and second supporting legs; the first supporting legs and the second supporting legs are oppositely distributed about the axis of the screw rod, so that the screw rod, the first supporting legs and the second supporting legs are combined into a Y-shaped structure. The screw avoiding hole can avoid the screw in the circumferential direction of the screw, so that the screw can rotate relative to the pull rod when the first nut and the second nut are moved away from the screw to loosen the pull rod, so that the first support leg and the second support leg rotate around the axis of the screw.
6. The neuro- retractor of claim 5, wherein, The support leg comprises: An inclined rod, one end of the inclined rod is connected with the screw, the inclined rod is arranged inclinedly relative to the axis of the screw, and the other end of the inclined rod extends away from the screw; And a bottom leg, arranged at the end of the inclined rod away from the screw, the bottom leg is arranged bent outwards away from the axis of the screw.
7. The neuro- retractor of claim 2, wherein, The pull hook and the forked part are located on the same side of the pull rod.
8. The neuro- retractor of claim 7, wherein, The pull hook, the forked part and the handle part are located on the same side of the pull rod.
9. The neuro- retractor of claim 8, wherein, The nerve pull hook comprises a bent part, the bent part is arranged at the end of the pull rod close to the handle part, and the bent part is arranged bent relative to the pull rod towards the side where the handle part is located; the end of the pull rod close to the handle part is connected with the handle part through the bent part.