Nerve dissector

Abstract

The utility model relates to the technical field of medical instruments, in particular to a nerve detacher which comprises a handle and a detacher body. The two ends of the stripper body are a fixed end and a stripping end respectively, the fixed end is fixedly installed on the handle, a negative pressure channel is arranged in the stripper body and provided with two inlets, the two inlets of the negative pressure channel are a first adsorption port and a second adsorption port respectively, the first adsorption port is located on one side of the stripping end, and the second adsorption port is located on the other side of the stripping end. The second adsorption port is located on the other side of the stripping end. According to the nerve detacher, the negative pressure channel is formed in the detacher body, so that the detacher body integrates the functions of detaching the nervous tissue and adsorbing the to-be-cleaned object, a doctor does not need to alternately use various tools, the to-be-cleaned object can be directly adsorbed after related operations are completed, tool replacement is reduced, and the operation is smoother and more efficient. In a complex operation, frequent tool replacement can be avoided, and pause and preparation time is shortened.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a nerve dissector. Background Technology

[0002] Spinal surgery is an important means of treating spinal diseases and injuries, involving various procedures such as discectomy, spinal decompression, and spinal fusion. During the surgery, tools such as laminectomy forceps are often used to remove bone to widen the spinal canal or nerve root canal. These procedures generate a large amount of bone fragments, 1-2 mm in size, which can easily remain around the nerve roots or in the intervertebral space.

[0003] In traditional spinal surgery, surgeons need to use multiple tools alternately to complete the procedure. For example, during spinal decompression, a dissector is first used to separate and protect the nerve tissue, followed by the use of laminar bone forceps to remove part of the lamina to widen the spinal canal. Bone fragments generated during this process must be removed using a suction gun. This tool-changing not only increases the complexity of the surgical steps but can also prolong the operation time. In complex spinal surgeries, multiple tool changes can accumulate to a considerable amount of surgical time. Utility Model Content

[0004] The purpose of this application is to provide a nerve stripper that integrates an adsorption function, thereby reducing device switching time.

[0005] To achieve the above objectives, this application provides a nerve dissector, comprising:

[0006] handle;

[0007] The peeler body has a fixed end and a peeling end at its two ends. The fixed end is fixedly installed on the handle. The peeler body is provided with a negative pressure channel with two inlets. The two inlets of the negative pressure channel are a first adsorption port and a second adsorption port. The first adsorption port is located on one side of the peeling end, and the second adsorption port is located on the other side of the peeling end.

[0008] In an optional embodiment, the negative pressure channel includes a main channel, a first sub-channel, and a second sub-channel. The first sub-channel and the second sub-channel are connected to the main channel to form a Y-shaped negative pressure channel. The inlet of the first sub-channel is the first adsorption port, and the inlet of the second sub-channel is the second adsorption port.

[0009] In an optional embodiment, there is an angle α between the axis of the first sub-channel and the end face where the first adsorption port is located, wherein 15°≤α≤35°.

[0010] In an optional embodiment, there is an angle β between the axis of the second sub-channel and the end face where the second adsorption port is located, wherein 5°≤β≤35°.

[0011] In an optional implementation, a first valve body is also included to control the opening and closing of the negative pressure channel.

[0012] In an alternative embodiment, the first valve body is mounted on the handle.

[0013] In an optional implementation, a second valve body is also included to control the magnitude of the negative pressure within the negative pressure channel.

[0014] In an alternative embodiment, the second valve body is mounted on the handle.

[0015] In an optional embodiment, the distance between the first adsorption port and the end of the peeling end that is away from the fixed end is A, wherein 2mm≤A≤4mm;

[0016] And / or, the distance between the second adsorption port and the end of the peeling end away from the fixed end is B, where 2mm≤B≤4mm.

[0017] In an optional embodiment, the included angle between the fixed end and the peeling end is γ, wherein 15°≤γ≤45°.

[0018] This nerve dissector integrates the functions of dissecting nerve tissue and adsorbing waste material by incorporating a negative pressure channel on its body. Surgeons no longer need to use multiple tools; waste material can be directly adsorbed after the procedure, reducing tool changes and making surgery smoother and more efficient. In complex surgeries, it avoids frequent tool changes, reduces downtime and preparation time, shortens surgical time, lowers patient risk, and improves operating room utilization. Its two adsorption ports are located on either side of the dissection end; a small rotation is sufficient for omnidirectional adsorption, minimizing waste residue. When there is a large amount of waste, both ports work simultaneously, increasing adsorption capacity, improving efficiency, maintaining a clear field of vision, and providing a good operating environment for the surgeon.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1A schematic diagram of the structure of one embodiment of the neural dissector provided in this application;

[0022] Figure 2 A cross-sectional view of a partial structure of one embodiment of the nerve dissector provided in this application;

[0023] Figure 3 A schematic diagram of one embodiment of the nerve dissector provided in this application;

[0024] Figure 4 A schematic diagram of the dissection end of one embodiment of the nerve dissector provided in this application;

[0025] Figure 5 A schematic diagram of the dissection end of another embodiment of the nerve dissector provided in this application;

[0026] Figure 6 A schematic diagram of the dissection end of another embodiment of the nerve dissector provided in this application.

[0027] icon:

[0028] 100-handle;

[0029] 200 - Peeling sub-body; 210 - Fixed end; 220 - Peeling end; 230 - Negative pressure channel; 231 - Main channel; 232 - First sub-channel; 233 - Second sub-channel; 240 - First adsorption port; 250 - Second adsorption port;

[0030] 300 - First valve body; 400 - Second valve body; 500 - Storage container; 600 - Vacuum pump. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] like Figure 1 As shown, embodiments of this application provide a nerve dissector, including a handle 100 and a dissector body 200.

[0035] like Figure 1 As shown, the two ends of the peeler body 200 are a fixed end 210 and a peeling end 220, respectively. The fixed end 210 is fixedly installed on the handle 100, and the fixing method is, for example, adhesive, snap-fit ​​or bolt fixing; the peeling end 220 is used to peel off nerve tissue.

[0036] The fixed end 210 and the stripping end 220 are integrally molded from medical titanium alloy.

[0037] like Figure 1 and Figure 2 As shown, a negative pressure channel 230 is provided inside the peeler body 200. The negative pressure channel 230 has two inlets, namely a first adsorption port 240 and a second adsorption port 250. During use, human tissue debris and body fluids (hereinafter referred to as "tissue debris and body fluids" as "materials to be cleaned") are adsorbed into the negative pressure channel 230 through the first adsorption port 240 and the second adsorption port 250.

[0038] In traditional spinal surgery, surgeons need to change suction guns to clean up bone debris after it is generated, which increases the complexity of the surgical procedure. However, the nerve dissector of this application integrates the functions of dissecting nerve tissue and adsorbing tissue debris into one unit. Surgeons no longer need to use multiple tools alternately. After completing procedures such as separating and protecting nerve tissue and removing the lamina, bone debris generated can be directly adsorbed using the nerve dissector, reducing the need to change tools and making the surgical procedure smoother and more efficient.

[0039] In complex surgeries, frequent tool changes can accumulate and consume a significant amount of surgical time. The nerve dissector of this application avoids frequent tool changes, reducing downtime and preparation time caused by tool changes, thereby effectively shortening the overall surgical time, reducing the risk of patients being in a surgical state for extended periods, and also improving the utilization efficiency of the operating room.

[0040] like Figure 2As shown, the first suction port 240 is located on one side of the dissection end 220, and the second suction port 250 is located on the other side of the dissection end 220. When the material to be cleaned is distributed circumferentially around the dissector body 200, the doctor does not need to rotate the nerve dissector excessively; a slight rotation is sufficient to suction the material through the suction ports on both sides. This design allows for a wider suction range, enabling more comprehensive cleaning of the material within the surgical area and reducing the possibility of material residue.

[0041] When there is a large amount of material to be adsorbed, the dual adsorption ports effectively increase the amount of material adsorbed. Compared to a single adsorption port, dual adsorption ports can work simultaneously, improving adsorption efficiency, enabling faster removal of surgical debris, maintaining a clear surgical field, and providing a better operating environment for the surgeon.

[0042] like Figure 2 As shown, in one embodiment, the negative pressure channel 230 includes a main channel 231, a first sub-channel 232 and a second sub-channel 233. The first sub-channel 232 and the second sub-channel 233 are connected to the main channel 231 to form a Y-shaped negative pressure channel 230. The inlet of the first sub-channel 232 is a first adsorption port 240, and the inlet of the second sub-channel 233 is a second adsorption port 250.

[0043] The Y-shaped negative pressure channel 230 is designed so that the first sub-channel 232 and the second sub-channel 233 are connected to the main channel 231 respectively, allowing the first suction port 240 and the second suction port 250 to be in different positions and angles. During the operation, when the material to be cleaned is distributed in different directions around the nerve, this structure can cover a larger area. Compared with a single channel or a simple layout of suction ports, it can more comprehensively absorb the surrounding material to be cleaned, reducing residue. For example, when the material to be cleaned is distributed in different areas on both sides and in front of the dissecting sub-body 200, the suction ports corresponding to the two sub-channels can effectively absorb the material to be cleaned in the corresponding areas.

[0044] The two sub-channels form a Y-shaped structure connected to the main channel 231, essentially providing two independent "paths" for the adsorption process. When a large amount of material to be adsorbed is generated during surgery, the first adsorption port 240 and the second adsorption port 250 can work simultaneously, rapidly drawing the material into the main channel 231 through their respective sub-channels and then expelling it. This parallel operation significantly increases the amount of material that can be adsorbed per unit time, substantially improving adsorption efficiency and facilitating faster cleaning of the surgical area while maintaining a clear surgical field.

[0045] Due to the unique structure of the Y-shaped negative pressure channel 230, surgeons using the nerve dissector do not need to significantly rotate or adjust the position and angle of the dissector body 200 during surgical procedures. They can utilize the two suction ports to adsorb material from different directions. Slight rotation of the nerve dissector allows the suction ports located at the inlets of different sub-channels to be aligned with the areas requiring cleaning, making the operation more flexible and convenient. This reduces the risk of interference and damage to surrounding nerves and tissues caused by frequent and significant tool adjustments, thus improving the safety and precision of the surgery.

[0046] To further improve the cleaning capacity, in one embodiment, the cross-sectional area of ​​the main channel 231 perpendicular to the axis is greater than or equal to the sum of the cross-sectional areas of the first sub-channel 232 and the second sub-channel 233 perpendicular to the axis. This structural design increases the negative pressure intensity at the first adsorption port 240 and the second adsorption port 250 under the same negative pressure source. The increased negative pressure intensity generates a stronger adsorption force, more effectively adsorbing the object into the channel, thereby improving the overall adsorption effect.

[0047] According to fluid mechanics principles, under a constant flow rate, changes in the cross-sectional area of ​​the channel affect the fluid velocity. This structural design increases the fluid velocity at the first adsorption port 240 and the second adsorption port 250. The faster fluid can more quickly entrain and carry away the material to be cleaned, just as a faster water flow can wash away debris more quickly, further enhancing the adsorption capacity and ensuring that the material to be cleaned during the procedure is removed in a timely manner.

[0048] The larger cross-sectional area of ​​the main channel 231 provides a more spacious flow space for the material to be cleaned. During the procedure, the adsorbed material flows within the channel with the fluid. When the amount of material to be cleaned is large or the material is relatively large, the spacious main channel 231 can better accommodate and transport these materials, avoiding accumulation and blockage caused by narrow channels, thus ensuring the continuity and stability of the adsorption process.

[0049] like Figure 2 As shown, in one embodiment, there is an angle α between the axis of the first sub-channel 232 and the end face where the first adsorption port 240 is located, wherein 15°≤α≤35°.

[0050] For example, α = 15°. In another embodiment, α = 20°. In another embodiment, α = 30°. In yet another embodiment, α = 35°.

[0051] If α < 15°, the fluid turning direction from the first sub-channel 232 to the main channel 231 will be too gentle. However, this gentle turning direction may cause turbulence or backflow in the channel. Turbulence and backflow will interfere with the normal flow of the fluid, making the movement of the material to be cleaned in the channel disordered. This will not only affect the smooth transport of the material to be cleaned, but may also cause the material to accumulate in the first sub-channel 232, increasing the risk of blockage.

[0052] If α is greater than 35°, the turning angle from the first sub-channel 232 to the main channel 231 will be too large, which will increase the resistance of the material to be cleaned flowing from the first sub-channel 232 to the main channel 231.

[0053] For example, such as Figure 1 As shown, the axis of the main channel 231 is parallel to the end face where the first adsorption port 240 is located.

[0054] like Figure 2 As shown, in one embodiment, there is an angle β between the axis of the second sub-channel 233 and the end face where the second adsorption port 250 is located, wherein 15°≤β≤35°.

[0055] For example, β = 15°. In another embodiment, β = 20°. In another embodiment, β = 30°. In yet another embodiment, β = 35°.

[0056] If β < 15°, the fluid in the second sub-channel 233 will turn too gently when flowing towards the main channel 231. However, this gentle turning may cause turbulence or backflow within the channel. Turbulence and backflow will interfere with the normal flow of the fluid, making the movement of the material to be cleaned within the channel disordered. This will not only affect the smooth transport of the material to be cleaned, but may also cause the material to accumulate in the second sub-channel 233, increasing the risk of blockage.

[0057] If β is greater than 35°, the turning angle from the second sub-channel 233 to the main channel 231 is too large, which will increase the resistance of the material to be cleaned flowing from the second sub-channel 233 to the main channel 231.

[0058] For example, such as Figure 1 As shown, the axis of the main channel 231 is parallel to the end face where the second adsorption port 250 is located.

[0059] like Figure 3 As shown, in one embodiment, the nerve dissector further includes a first valve body 300 that controls the opening and closing of the negative pressure channel 230. When the first valve body 300 closes the negative pressure channel 230, the negative pressure at the first adsorption port 240 and the second adsorption port 250 is zero.

[0060] For example, a first valve body 300 is disposed on the main channel 231. When the first valve body 300 is closed, the main channel 231 is closed, causing the first sub-channel 232 and the second sub-channel 233 to close, and the negative pressure of the first adsorption port 240 and the second adsorption port 250 to be zero. When the first valve body 300 is opened, the main channel 231 is open, causing the first sub-channel 232 and the second sub-channel 233 to open, and generating negative pressure in the first adsorption port 240 and the second adsorption port 250.

[0061] For example, the first valve body 300 is configured as a ball valve. Of course, in other embodiments, the first valve body 300 may also be configured as other valve bodies, such as a gate valve or a stop valve.

[0062] For example, such as Figure 3 As shown, a vacuum pump 600 is installed on the main channel 231. The vacuum pump 600 is used to provide negative pressure to the main channel 231, the first sub-channel 232 and the second sub-channel 233.

[0063] For example, such as Figure 3 As shown, a storage container 500 is also provided on the main channel 231. The first valve body 300, the storage container 500 and the vacuum pump 600 are arranged in sequence. After the material to be cleaned enters the main channel 231 from the first sub-channel 232 and the second sub-channel 233, it passes through the first valve body 300 and the storage container 500 under the negative pressure provided by the vacuum pump 600. The material to be cleaned enters the storage container 500 for storage, thereby completing the cleaning work.

[0064] For example, the storage container 500 is configured as a storage bottle, storage box, or storage bucket, etc.

[0065] like Figure 1 As shown, in one embodiment, the first valve body 300 is mounted on the handle 100 to facilitate manual operation of the first valve body 300 by the doctor.

[0066] For example, a roller is provided on the valve core control rod of the first valve body 300, and the doctor controls the opening and closing of the first valve body 300 by means of the roller.

[0067] like Figure 3 As shown, in one embodiment, the nerve stripper also includes a second valve body 400 for controlling the magnitude of the negative pressure within the negative pressure channel 230.

[0068] For example, such as Figure 3 As shown, the first valve body 300, storage container 500, second valve body 400 and vacuum pump 600 are arranged in sequence.

[0069] like Figure 1 As shown, in one embodiment, the second valve body 400 is mounted on the handle 100.

[0070] For example, the second valve body 400 is disposed at the tail end of the handle 100 (i.e., the end of the handle 100 away from the peeler body 200).

[0071] like Figure 4 As shown, in one embodiment, the distance between the first adsorption port 240 and the end of the peeling end 220 away from the fixed end 210 is A, where 2mm≤A≤4mm.

[0072] For example, A = 2 mm; in another embodiment, A = 2.5 mm; in another embodiment, A = 3 mm; in another embodiment, A = 3.5 mm; in another embodiment, A = 4 mm.

[0073] If A < 2 mm, the first adsorption port 240 is too close to the tip of the peeling end 220, reducing the effective area of ​​the peeling end 220 for peeling tissue and affecting the peeling efficiency and effect.

[0074] If A > 4 mm, the distance between the first adsorption port 240 and the tip of the peeling end 220 is too far. When cleaning is required, the peeling end 220 may easily prevent the first adsorption port 240 from adsorbing the object to be cleaned.

[0075] like Figure 5 As shown, in one embodiment, the distance between the second adsorption port 250 and the end of the peeling end 220 away from the fixed end 210 is B, where 2mm≤B≤4mm.

[0076] For example, B = 2 mm; in another embodiment, B = 2.5 mm; in another embodiment, B = 3 mm; in another embodiment, B = 3.5 mm; in another embodiment, B = 4 mm.

[0077] like Figures 4 to 6 As shown, in one embodiment, the included angle between the fixed end 210 and the peeling end 220 is γ, where 15°≤γ≤45°.

[0078] For example, such as Figure 4 As shown, γ=15°, allowing the dissected end 220 to fit the narrow intervertebral space of the cervical spine. Figure 5 As shown, in another embodiment, γ=30°, so that the dissected end 220 is adapted to the intervertebral space between the thoracic vertebral laminae and the spinal cord. Figure 6 As shown, in another embodiment, γ=45°, so that the stripping end 220 is adapted to the intervertebral space of the lumbar spine and the direction of nerve root course.

[0079] The following demonstrates the usage of the nerve stripper provided in this application (taking lumbar disc herniation nucleotomy as an example):

[0080] Preoperative preparation: Select a nerve dissector with an angle γ of 45° between the fixed end 210 and the dissection end 220 according to the surgical segment (lumbar spine). Open the first valve body 300 and the second valve body 400 to test the suction function (ensure no leakage).

[0081] Intraoperative procedure: The surgeon holds the handle 100 in a seated position and inserts the dissection end 220 of the dissector body 200 into the lumbar spinal canal through the minimally invasive working channel (8mm in diameter), aligning it with the space between the ligamentum flavum and the dural sac.

[0082] Simultaneous dissection and suction: When slowly pushing the dissection end 220 to dissect the ligamentum flavum, the thumb (or other fingers, depending on work habits) controls the first valve body 300 (suction -0.02MPa), and the first suction port 240 or the second suction port 250 removes the ligamentum flavum debris and vertebral lamina bone surface bleeding generated during dissection in real time; when encountering a small amount of bleeding from the intervertebral venous plexus, the second valve body 400 is controlled to increase the negative pressure (suction -0.03MPa) to quickly remove blood and maintain a clear field of vision for the dural sac and nerve roots.

[0083] Bone debris removal: When using the peeling end 220 to remove 1mm-2mm bone debris remaining in the intervertebral space, the first valve body 300 remains open and the second valve body 400 remains half-open. The bone debris is sucked into the negative pressure channel 230 through the first suction port 240 or the second suction port 250 to avoid remaining around the nerve root.

[0084] Postoperative care: After the operation, close the first valve body 300 and the second valve body 400, inject 5ml of normal saline into the negative pressure channel 230 to flush (to prevent bone fragments from remaining and clogging), and disinfect for later use.

[0085] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A nerve dissector, characterized in that, include: Handle (100); The peeling body (200) has a fixed end (210) and a peeling end (220) at its two ends. The fixed end (210) is fixedly installed on the handle (100). The peeling body (200) is provided with a negative pressure channel (230). The negative pressure channel (230) is provided with two inlets. The two inlets of the negative pressure channel (230) are a first adsorption port (240) and a second adsorption port (250). The first adsorption port (240) is located on one side of the peeling end (220), and the second adsorption port (250) is located on the other side of the peeling end (220).

2. The nerve dissector according to claim 1, characterized in that, The negative pressure channel (230) includes a main channel (231), a first sub-channel (232), and a second sub-channel (233). The first sub-channel (232) and the second sub-channel (233) are connected to the main channel (231) to form a Y-shaped negative pressure channel (230). The inlet of the first sub-channel (232) is the first adsorption port (240), and the inlet of the second sub-channel (233) is the second adsorption port (250).

3. The nerve dissector according to claim 2, characterized in that, There is an angle α between the axis of the first sub-channel (232) and the end face where the first adsorption port (240) is located, where 15°≤α≤35°.

4. The nerve dissector according to claim 2, characterized in that, There is an angle β between the axis of the second sub-channel (233) and the end face where the second adsorption port (250) is located, where 15°≤β≤35°.

5. The nerve dissector according to claim 1, characterized in that, It also includes a first valve body (300) that controls the opening and closing of the negative pressure channel (230).

6. The nerve dissector according to claim 5, characterized in that, The first valve body (300) is mounted on the handle (100).

7. The nerve dissector according to claim 1, characterized in that, It also includes a second valve body (400) that controls the magnitude of the negative pressure within the negative pressure channel (230).

8. The nerve dissector according to claim 7, characterized in that, The second valve body (400) is mounted on the handle (100).

9. The nerve dissector according to claim 1, characterized in that, The distance between the first adsorption port (240) and the end of the peeling end (220) away from the fixed end (210) is A, where 2mm≤A≤4mm; And / or, the distance between the second adsorption port (250) and the end of the peeling end (220) away from the fixed end (210) is B, where 2mm≤B≤4mm.

10. The nerve dissector according to claim 1, characterized in that, The included angle between the fixed end (210) and the peeling end (220) is γ, where 15°≤γ≤45°.

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