Knife-cutting nerve stripper and use method thereof
By designing knife-cut nerve strippers with cutting function, using cutting knife and spring switch mechanisms, the problem of limited operating space in spinal surgery is solved, and soft tissue cutting of nerve surfaces with one-handed operation is realized, which improves surgical efficiency and Reduces the risk of nerve damage.
Patent Information
- Application Number
- CN202010999261.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-22
- Publication Date
- 2025-01-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In spinal surgery, the operating space is limited, and it is difficult to separate and resection of nerves and soft tissues simultaneously when using ordinary nerve stripping, resulting in inefficiency in the surgical procedure and increasing the risk of nerve damage.
A knife-cut nerve stripper with cutting function was designed. By setting a cutting knife and a spring switch mechanism on the sharp peeling part, it allows one-handed operation to perform soft tissue cutting on the nerve surface, reducing the dependence on other surgeons. .
It realizes separate nerve surface soft tissue cutting in a narrow space, reducing the difficulty of surgery and the risk of nerve damage, improving surgical efficiency, and saving medical resources.
Smart Images
Figure CN112155662B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, in particular to a knife-cutting nerve stripper and a use method thereof. Background Art
[0002] Conventional nerve dissectors currently in use are typically made of a thin, flat metal rod. Their primary function is to separate nerve tissue or adhesions between the dura mater and ligaments and soft tissue, as well as to retract the nerve or dura mater. Their operation is characterized by lightness and precision. During spinal surgery, when nerve decompression is required, the surgeon holds the middle of the nerve dissector and uses the tip of the dissector to separate the nerve or separate adhesions between the nerve and soft tissue. Other tools are then used to remove ligaments compressing the nerve, such as the ligamentum flavum. For certain confined areas, the dissector must also simultaneously remove the compressive material.
[0003] Problems:
[0004] Due to limited operating space, it is difficult to use another tool to cut the soft tissue on the surface of the nerve while using a nerve dissector for separation. When other surgical tools are needed, other surgeons have to help, wasting medical resources.
[0005] When the cutting space is small, other surgical tools are needed for cutting, which undoubtedly increases the difficulty of the surgical operation, reduces the efficiency of the operation, and easily causes nerve damage to the patient. Summary of the Invention
[0006] In view of the above problems existing in the prior art, the present invention provides a knife-cutting nerve dissector and a method for using the same, which solves the above problems by designing a nerve dissector with a cutting function.
[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:
[0008] A knife-cutting nerve stripper, the stripper body consists of a flat stripping part and a sharp stripping part connected at both ends of a handle, a cavity is provided inside the front end of the handle, a fixed block is provided on the rod of the sharp stripping part, the fixed block is a horizontal hollow cylinder, a connecting rod passes through the hollow part, the other end of the connecting rod is arranged in a slideway in the cavity, a spring switch is provided in the cavity, a flexible rod is provided in the part of the connecting rod located in the cavity, the flexible rod is connected to the bottom end of the spring switch, a guide block is provided in the cavity, the guide block body is a hollow cylinder, the internal hollow part passes through the flexible rod, a thrust spring is provided in the slideway, one end of the thrust spring is connected to the stopper of the connecting rod, the distal end of the connecting rod is connected to a cutting knife, the top of the spring switch passes through the handle to the outside world, the front end of the sharp stripping part is provided with a stripping head perpendicular to it, the cutting knife is parallel to the stripping head, the length of the cutting knife is shorter than the stripping head, and the stripping head 103 is provided with an inwardly recessed groove 109 at the position facing the cutting knife 4.
[0009] As another preferred embodiment, when the connecting rod moves to the rightmost position, the minimum width between the cutting knife and the stripping head is 1.5 cm.
[0010] As another preferred embodiment, two thrust springs are provided at upper and lower symmetrical positions.
[0011] As another preferred embodiment, the spring switch comprises a button, a push rod, a sliding gripper, a guide rail, a spring, and a brake plate. The push rod and the sliding gripper are positioned within the guide rail, a spring is mounted at the bottom end of the sliding gripper, and a brake plate is mounted at the bottom end of the spring. The operating principle is as follows: when the top push rod is pressed, the push rod pushes the sliding gripper to the bottom tip of the guide rail. Under the push of the bottom spring, the sliding gripper rotates to the right. The push rod rebounds upward under the action of the top spring. After passing a critical point, the sliding gripper continues to rotate to the right and becomes stuck in the guide rail, causing the brake plate to move downward. The flexible rod is connected to the right side of the brake plate and is driven downward. Under the guidance of the guide block, the flexible rod pulls the connecting rod to move left, separating the front cutter. When the push rod is pressed again, the push rod pushes the sliding gripper to rotate, causing the sliding gripper to fall into a deeper guide groove within the guide rail, retracting the brake plate. The flexible rod moves upward to return to its original position. The thrust spring pushes the connecting rod via a block, causing the cutter to cut toward the stripping head.
[0012] As another preferred embodiment, the buttons for the cutting knife and the spring switch are respectively located on the front and back sides of the stripping sub-body.
[0013] As another preferred embodiment, the flexible rod is connected to the bottom end of the guide rail.
[0014] As another preferred embodiment, the outer wall of the handle is provided with anti-slip patterns.
[0015] As another preferred embodiment, the cylindrical inner walls of the fixing block and the guide block are smooth.
[0016] A method for using a knife-cutting nerve stripper is characterized in that: when in use, one hand holds the handle, presses the button of the spring switch, retracts the cutting knife at the front end, places the sharp stripping part at the front end under the yellow ligament to be cut, and allows the yellow ligament to be between the cutting and sharp stripping parts, presses the button again, and the push rod pushes the sliding claw to rotate, and the sliding claw sleeve falls into the deeper guide groove in the guide rail, retracts the brake plate, and the flexible rod moves upward to return to its original state. The thrust spring pushes the connecting rod through the block, and the cutting knife makes a cutting movement toward the stripping head to cut the yellow ligament and other tissues.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The knife-cutting nerve stripper designed by the present invention:
[0019] By designing a nerve stripper with a cutting function, by pressing the button of the spring switch, the cutting knife is driven to the stripping head at the front end of the nerve stripper under the action of the connecting rod and the thrust spring to cut the yellow ligament tissue; that is, a surgeon can cut the soft tissue on the surface of the nerve using only the nerve stripper of the present invention without the help of other surgeons, and the other hand can operate other surgical tools, such as a suction device, saving medical resources.
[0020] At the same time, when encountering a smaller surgical space, only one tool needs to be inserted, which reduces the difficulty of the surgical operation, improves the efficiency of the operation, and reduces the possible nerve damage to the patient.
[0021] More importantly, the present invention has a simple structure, is easy to operate, and can be easily promoted and applied in various medical and related technical fields.
[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 This is a schematic diagram of the structure of the knife-cutting nerve stripper of the present invention;
[0025] Figure 2 This is a partial structural diagram of the connecting rod of the present invention;
[0026] Figure 3 This is a schematic diagram of the structure of the components in the cavity of the present invention;
[0027] Figure 4 This is a schematic structural diagram of the spring switch of the present invention;
[0028] Figure 5 This is an exploded view of the main components of the spring switch of the present invention;
[0029] Figure 6 This is a schematic structural diagram of the thrust spring and stopper of the present invention;
[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0031] Handle, 101-flat stripping part, 102-sharp part, 103-stripping head, 104-cavity, 105-slide, 106-fixed block, 107-guide block, 108-spacer, 109-groove, 2-connecting rod, 201-flexible rod, 202-stop block, 203-thrust spring, 3-spring switch, 300-button, 301-push rod, 302-sliding gripper, 303-guide rail, 304-spring, 305-brake plate, 4-cutting knife. DETAILED DESCRIPTION
[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.
[0033] like Figure 1-6 shown
[0034] A knife-type nerve stripper, the stripper body consists of a handle 1 with a flat stripping part 101 and a sharp stripping part 102 connected at both ends. The front end of the handle 1 is provided with a cavity 104. The sharp stripping part 102 is provided with a fixing block 106 on the shaft. The fixing block 105 is a horizontal hollow cylindrical shape, and a connecting rod 2 passes through the hollow part.
[0035] The other end of the connecting rod 2 is arranged in a slideway 105 in the cavity 104. A spring switch 3 is arranged in the cavity 104. The portion of the connecting rod 2 located in the cavity 104 is provided with a flexible rod 201. The flexible rod 201 is connected to the bottom end of the spring switch 3.
[0036] A guide block 107 is provided in the cavity. The main body of the guide block 107 is a hollow cylinder, and the hollow interior passes through a flexible rod 201. A thrust spring 203 is provided in the slideway 105. One end of the thrust spring 203 is connected to the stopper 202 of the connecting rod 2. The distal end of the connecting rod 2 is connected to a cutting knife 4. The top end of the spring switch 3 is exposed to the outside through the handle 1.
[0037] As another preferred embodiment, the front end of the sharp stripping portion 102 is provided with a stripping head 103 perpendicular to it, the cutting knife 4 is parallel to the stripping head 103, the length of the cutting knife 4 is shorter than the stripping head 103, and the stripping head 103 is provided with an inwardly recessed groove 109 at the position facing the cutting knife 4.
[0038] As another preferred solution, when the connecting rod moves to the rightmost position, the minimum width b between the cutting knife 4 and the stripping head 103 is 1.5 mm.
[0039] As another preferred solution, two thrust springs 203 are provided at upper and lower symmetrical positions.
[0040] As another preferred embodiment, the spring switch 3 is composed of a button 300, a push rod 301, a sliding grip 302, a guide rail 303, a spring 304, and a brake plate 305. The push rod 301 and the sliding grip 302 are arranged in the guide rail. The bottom end of the sliding grip 302 is covered with a spring 304, and the bottom end of the spring 304 is covered with a brake plate 305. The working principle is as follows: when the top push rod 301 is pressed, the push rod 301 pushes the sliding grip 302 to the top end of the guide rail. Under the push of the bottom spring 304, the sliding grip 302 rotates to the right. The push rod rebounds upward under the action of the top spring 306. After passing the critical point, the sliding grip 302 continues to rotate to the right and is stuck in the guide rail 303. The brake plate 305 moves downward. The flexible rod 201 is connected to the right side of the brake plate 305. The flexible rod 201 is driven to move downward, and under the guidance of the guide block 107, the flexible rod 201 pulls the connecting rod to the left, and the front end cutting knife 4 is separated. The push rod 301 is pressed again, and the push rod 301 pushes the sliding gripping sleeve 302 to rotate. The sliding gripping sleeve 302 falls into the deeper guide groove in the guide rail 303, and the brake plate 305 is retracted. The flexible rod 201 moves upward and returns to its original state. The thrust spring 203 pushes the connecting rod 2 through the block 202, and the cutting knife 4 makes a cutting motion toward the stripping head 103.
[0041] As another preferred solution, the flexible rod 201 is connected to the bottom end of the guide rail 303 of the spring switch 3 .
[0042] As another preferred solution, the outer wall of the handle 1 is provided with anti-slip lines.
[0043] As another preferred solution, the cylindrical inner walls of the fixing block 106 and the guide block 107 are smooth.
[0044] The technical solution of the present invention is described below with reference to specific embodiments: Example 1
[0045] A knife-cutting nerve stripper, the stripper body consists of a handle 1 with a flat stripping part 101 and a sharp stripping part 102 connected at both ends respectively. A cavity 104 is provided inside the front end of the handle 1, and a fixing block 106 is provided on the rod of the sharp stripping part 102. The fixing block 105 is a horizontal hollow cylinder with a connecting rod 2 passing through the hollow part. The other end of the connecting rod 2 is set in a slide 105 in the cavity 104, and a spring switch 3 is provided in the cavity 104. Example 2
[0046] The portion of the connecting rod 2 located within the cavity 104 is provided with a flexible rod 201, which is connected to the bottom end of the spring switch 3. A guide block 107 is provided within the cavity. The guide block 107 is a hollow cylindrical body with a hollow interior extending through the flexible rod 201. A thrust spring 203 is provided within the slideway 105, one end of which is connected to a stopper 202 of the connecting rod 2. A cutting blade 4 is attached to the distal end of the connecting rod 2, and the top end of the spring switch 3 is exposed to the outside world through a handle 1. The front end of the sharp stripping portion 102 is provided with a stripping head 103 perpendicular thereto. The cutting blade 4 is parallel to the stripping head 103. When the connecting rod moves to the rightmost position, the minimum width b between the cutting blade 4 and the stripping head 103 is 1.5 mm. Two thrust springs 203 are provided in symmetrical positions, pushing the connecting rod to the right when the springs are functioning normally. Example 3
[0047] Based on Examples 1-3, a knife-cutting nerve stripper is used to remove the yellow ligament that compresses the nerve.
[0048] During the specific implementation, hold the handle 1 with one hand, press the button 300 of the spring switch 3, retract the front end cutting knife 4, place the front end sharp stripping part 102 under the yellow ligament to be cut, so that the yellow ligament is between the cutting 4 and the sharp stripping part 102, press the button 300 again, the push rod 301 pushes the sliding claw to rotate, the sliding claw sleeve falls into the deeper guide groove in the guide rail 303, retract the brake plate 305, the flexible rod 201 moves upward and returns to its original state, the thrust spring 203 pushes the connecting rod 2 through the block 202, and the cutting knife 4 makes a cutting movement toward the stripping head 103 to cut the yellow ligament.
[0049] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0050] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. A knife-cutting nerve stripper, characterized in that: The stripping sub-body is composed of a flat stripping part and a sharp stripping part connected to the two ends of the handle, a cavity is provided inside the front end of the handle, and a fixing block is provided on the rod of the sharp stripping part. The fixing block is a horizontal hollow cylindrical shape, and a connecting rod passes through the hollow part; One end of the connecting rod is arranged in a slideway in the cavity, a spring switch is arranged in the cavity, and a flexible rod is arranged at the portion of the connecting rod located in the cavity, and the flexible rod is connected to the bottom end of the spring switch; A guide block is arranged in the cavity, the main body of the guide block is a hollow cylinder, the hollow interior of which passes through a flexible rod, a thrust spring is arranged in the slideway, one end of the thrust spring is connected to a stopper of a connecting rod, the other end of the connecting rod is connected to a cutting knife, and the top end of the spring switch is connected to a handle to the outside; The front end of the sharp stripping part is provided with a stripping head perpendicular to it, the cutting knife is parallel to the stripping head, the length of the cutting knife is shorter than the stripping head, the cutting knife and the button of the spring switch are respectively located on the front and back sides of the stripping sub-body, and the position of the stripping head facing the cutting knife is provided with an inwardly concave groove; The spring switch is composed of a button, a push rod, a sliding grab sleeve, a guide rail, a spring and a brake plate, the matching positions of the push rod and the sliding grab sleeve are in the guide rail, the bottom end of the sliding grab sleeve is sleeved with a spring, and the bottom end of the spring is sleeved with a brake plate; the top push rod is pressed, the push rod pushes the sliding grab sleeve to move to the tip position of the bottom of the guide rail, and the sliding grab sleeve rotates to the right side under the push of the bottom spring, and the push rod rebounds upward under the action of the top spring. After passing the critical point, the sliding grab sleeve continues to rotate to the right side and is stuck in the guide rail, and the brake plate moves downward, the flexible rod is connected to the right side of the brake plate, the flexible rod is driven to move downward, and under the guidance of the guide block, the flexible rod pulls the connecting rod to move left, and the front end cutting knife is separated, and the push rod is pressed again, the push rod pushes the sliding grab sleeve to rotate, the sliding grab sleeve falls into the deeper guide groove in the guide rail, the brake plate is retracted, the flexible rod moves upward and returns to its original state, the thrust spring pushes the connecting rod through the stopper, and the cutting knife performs a cutting movement toward the stripping head; The flexible rod is connected to the bottom end of the guide rail of the spring switch.
2. The knife-cutting nerve stripper according to claim 1, characterized in that: When the connecting rod moves to the rightmost position, the minimum width between the cutting knife and the stripping head is 1.5 mm.
3. The knife-cutting nerve stripper according to claim 1, characterized in that: The thrust springs are provided with two in total at upper and lower symmetrical positions.
4. The knife-cutting nerve stripper according to claim 1, characterized in that: The outer wall of the handle is provided with anti-skid patterns.
5. The knife-cutting nerve stripper according to claim 1, characterized in that: The cylindrical inner walls of the fixed block and the guide block are smooth.