Mucotome

Abstract

This utility model discloses a mucosal incision knife, comprising: a handle with an internal cavity, a water injection port and a conductive insert on the handle, both extending into the cavity; a sheath, one end of which is connected to the cavity, and the other end of which is fitted with a snake-bone structure, the end of which is suspended away from the sheath, and the inner wall of which has four rows of symmetrically arranged threading holes; a knob mechanism and two chains, the knob mechanism being rotatably connected to the handle, one end of which extends into the cavity and engages with the two chains respectively, the two free ends of each chain passing through the corresponding two rows of threading holes and connecting to the edge of the suspended end of the snake-bone structure; and a hollow guidewire, one end of which is connected to the water injection port and rotatably connected to it. This allows for multi-angle bending, greatly expanding its applicability and facilitating clinical operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a mucosal incision knife. Background Technology

[0002] In recent years, with the rapid advancement of endoscopic technology, endoscopic submucosal dissection (ESD) has increasingly become the preferred medical approach for the diagnosis and treatment of diseases such as gastrointestinal polyps, submucosal tumors, and early-stage gastrointestinal cancers. ESD technology utilizes various mucosal incision tools to dissect the submucosal layer at the site of the gastrointestinal lesion, embodying the essence of minimally invasive endoscopic surgery.

[0003] However, a common limitation of currently widely used mucosal incision blade designs is their lack of bending capability at the tip, relying entirely on the movement of the endoscope insertion section for cutting operations. It is worth noting that the biopsy channel outlet of existing gastrointestinal endoscopes is usually located below the tip of the endoscope (often at the 5 o'clock to 7 o'clock position at the insertion section). This means that when using a mucosal incision blade, the blade naturally lies in the lower part of the field of view after extending from the biopsy channel. When cutting lesions in the upper field of view, the physician needs to adjust the amount of gas in the gastrointestinal lumen and rotate the endoscope to move the target cutting position from the upper to the lower part of the field of view. However, when dealing with narrow or tortuous areas of the digestive tract, such as the esophagus, gastric fundus, duodenal bulb, and descending part, the endoscope tip is difficult to bend at multiple angles, making the aforementioned techniques difficult and technically demanding, thus causing many inconveniences in clinical practice. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one objective of this invention is to provide a mucosal incision knife that can be bent at multiple angles, greatly expanding its applicability and making it more convenient for clinical operation.

[0006] To achieve the above objectives, this utility model proposes a mucosal incision knife, comprising: a handle, the handle having an internal receiving cavity, a water injection port and a conductive insert on the handle, with one end of the water injection port and the conductive insert extending into the receiving cavity; a sheath, one end of the sheath communicating with the receiving cavity, the other end of the sheath being fitted with a snake-bone structure, the end of the snake-bone structure away from the sheath being suspended, and the inner peripheral wall of the snake-bone structure having four rows of symmetrically arranged threading holes; a knob mechanism and two chains, the knob mechanism being rotatably connected to the handle, and one end of the knob mechanism extending into the receiving cavity and engaging with the two chains respectively, each chain having two free... The ends are respectively threaded through two rows of corresponding through holes and connected to the edge of the suspended end of the snake bone structure; a hollow guide wire, one end of which is connected to the water inlet and rotatably connected to the water inlet, the conductive core is rotatably connected to the hollow guide wire, the other end of which passes through the snake bone structure and can extend to the outside of the snake bone structure, the end of the hollow guide wire away from the receiving cavity is connected to a cutting head, and the end of the cutting head away from the hollow guide wire has a water outlet hole; a button, which is movably mounted on the handle, one end of which extends into the receiving cavity and is rotatably connected to the hollow guide wire, the button is used to push the hollow guide wire to actuate the cutting head to extend or retract into the snake bone structure.

[0007] The mucosal incision knife of this utility model allows the operator to control a rotary knob mechanism, enabling the individual or simultaneous rotation of two chains. This allows the snake-like structure to flexibly bend in multiple directions, including up, down, left, right, upper right, upper left, lower right, and lower left. Simultaneously, the hollow guidewire bends along with the snake-like structure. Ultimately, this bending deformation is transmitted to the blade tip, allowing the mucosal incision knife to bend at multiple angles, greatly expanding its applicability and facilitating clinical operation. Furthermore, a control button allows the hollow guidewire to be pushed, extending or retracting the blade tip into the snake-like structure, precisely controlling the extension length and position of the blade tip. This enables accurate removal of diseased tissue and avoids unnecessary damage to the body during insertion.

[0008] In addition, the mucosal incision knife proposed in the application may also have the following additional technical features:

[0009] Specifically, the knob mechanism includes a first tube, a second tube, a first knob, a second knob, and two drive sprockets. The first tube is rotatably connected to the handle, with one end of the first tube disposed outside the handle and the other end disposed in the receiving cavity and fixedly connected to one of the drive sprockets. The second tube is rotatably connected to the first tube and coaxially arranged with the first tube. One end of the second tube protrudes from the first tube and engages with the second knob, while the other end of the second tube protrudes from the first tube and is fixedly connected to the other drive sprocket. The first knob is fixed to the outer peripheral wall of the first tube.

[0010] Specifically, the knob mechanism further includes an inner ring, an outer ring, and a push rod. The inner ring is fixed to the handle and is located between the first knob and the handle. The outer ring is threaded onto the inner ring and is in contact with the first knob. The push rod is disposed on the outer ring, and one end of the push rod extends outside the first knob.

[0011] Specifically, the knob mechanism further includes a screw and a nut. A groove is provided on the outer peripheral wall of the second tube near the end of the second knob. A locking block is provided on the inner peripheral wall of the second knob. The locking block can be slidably inserted into the groove. One end of the screw is fixed in the receiving cavity. The other end of the screw passes through the second tube and extends to the outside of the second tube. The nut is threaded onto the screw and can move axially relative to the second tube to abut against one end of the second tube.

[0012] Specifically, the chain includes two guide wires, two spring tubes, and a meshing section that matches the drive sprocket. The meshing section is fixed between the two guide wires to connect them and meshes with the drive sprocket. One end of the guide wire away from the meshing section passes through a corresponding threading hole and connects to the edge of the suspended end of the snake bone structure. The spring tubes wrap around the outer periphery of the guide wires, and the guide wires and spring tubes are in clearance fit. At least a portion of the spring tubes inside the sheath is fixed to the inner wall of the sheath.

[0013] Specifically, the button includes a limiting block, a push button, and a collar. The handle has a groove and a through groove, which are connected. The limiting block is I-shaped and slidably connected in the through groove. One end of the limiting block is located in the groove, and the other end is located in the receiving cavity. The push button is arranged outside the handle, and one end of the push button is fixed to the limiting block. The collar is fixed to the limiting block and is rotatably connected to the hollow guide wire.

[0014] Specifically, the sheath has an arc-shaped groove, which is located near the rocker arm. One end of the rocker arm is fixed to the hollow guide wire, and the other end of the rocker arm extends through the arc-shaped groove to the outside of the sheath.

[0015] Specifically, a rubber ring is fitted on the outer peripheral wall of the rocker arm, and the rubber ring elastically abuts against the inner wall of the arc-shaped groove.

[0016] Specifically, it also includes a limiting plate, which is fixed at the communication interface between the sheath and the receiving cavity. The limiting plate has a first through hole and four second through holes. The first through hole is centrally located on the limiting plate, and the four second through holes are arranged below the hollow guide wire. The hollow guide wire passes through the first through hole, and the multiple chains pass through the corresponding second through holes.

[0017] Specifically, the second through hole is covered with insulating material. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a mucosal cutting knife according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of a handle according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of a portion of the internal structure of a snake-bone structure according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a snake bone structure according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of a snake-bone structure according to an embodiment of the present invention;

[0025] Figure 6 This is a partial structural schematic diagram of a knob mechanism according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure of the card block and the card slot according to an embodiment of the present invention;

[0027] Figure 8 This is a cross-sectional structural diagram of a handle according to an embodiment of the present invention;

[0028] Figure 9 This is a partial structural schematic diagram of a mucosal cutting knife according to an embodiment of the present invention;

[0029] Figure 10 According to one embodiment of the present utility model Figure 9 Enlarged structural diagram of area A in the middle;

[0030] Figure 11 This is a schematic diagram of a portion of the internal structure of a sheath according to an embodiment of the present invention;

[0031] Figure 12 This is a schematic diagram of the blade of a mucosal cutting knife according to an embodiment of the present invention in various bending states at different angles;

[0032] Figure 13 This is a structural schematic diagram of different types of blade shapes according to one embodiment of the present invention;

[0033] Figure 14 This is a schematic diagram of the installation of the baffle and the beaded chain segment according to an embodiment of the present invention.

[0034] As shown in the figure:

[0035] 1. Handle; 10. Receiving cavity; 11. Water inlet; 12. Conductive insert; 100. Groove; 101. Through slot;

[0036] 2. Sheath tube; 20. Arc groove; 21. Limiting plate; 210. First through hole; 211. Second through hole;

[0037] 3. Snake-bone structure; 30. Threading hole;

[0038] 4. Chain; 40. Guide wire; 41. Bourdon tube; 42. Engaging section; 43. Baffle; 420. Bead chain segment;

[0039] 5. Knob mechanism; 50. First tube body; 51. Second tube body; 52. First knob; 53. Second knob; 54. Drive sprocket; 55. Inner collar; 56. Outer collar; 57. Screw; 58. Nut; 59. Locking block; 510. Slot; 560. Push rod;

[0040] 6. Hollow guidewire;

[0041] 7. Cutting head; 70. Water outlet; 71. Needle-shaped cutting head; 72. Hook-shaped cutting head; 73. Front-insulated hemispherical cutting head;

[0042] 8. Button; 80. Limit block; 81. Push button; 82. Ring;

[0043] 9. Joystick; 90. Rubber ring. Detailed Implementation

[0044] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0046] The mucosal cutting knife of this utility model embodiment will now be described with reference to the accompanying drawings.

[0047] like Figures 1 to 11 As shown, the mucosal incision knife of this utility model embodiment may include a handle 1, a sheath 2, a snake bone structure 3, two chains 4, a knob mechanism 5, a hollow guide wire 6, a blade head 7, and a button 8.

[0048] The handle 1 has a cavity 10 inside, and a water inlet 11 and a conductive plug 12 are provided on the handle 1. One end of the water inlet 11 and the conductive plug 12 both extend into the cavity 10.

[0049] It should be noted that the water injection interface 11 described in this embodiment is a Luer connector, which can be connected to an external syringe or water injection pump to inject water into the hollow guide wire 6 through the water injection interface 11. The conductive insert 12 is used to connect to a high-frequency electric cutting machine so that the high-frequency current can be transmitted to the cutter head 7 through the conductive insert 12 to realize the cutting function.

[0050] Continue reading Figure 3 , Figure 4 and Figure 5 One end of the sheath 2 is connected to the receiving cavity 10, and the other end of the sheath 2 is fitted with a snake bone structure 3. The end of the snake bone structure 3 away from the sheath 2 is suspended, and the inner peripheral wall of the snake bone structure 3 has four rows of symmetrically arranged threading holes 30. (Referring to...) Figure 5The four rows of threading holes 30 can be arranged at positions 3, 6, 9 and 12 on the inner peripheral wall of the snake bone structure 3. Setting the threading holes 30 at these four positions can facilitate the guidance and control of the direction of the chain 4 and reduce the crossing and interference between the chains 4.

[0051] In the above scheme, the sheath 2 can be a metal tube covered with insulating material or a non-metallic tube with good toughness to achieve insulation.

[0052] It should be noted that the snake bone structure 3 is composed of multiple small bones or joints connected to each other through a special connection method. These connection points are usually spherical or hinge-shaped, allowing the small bones or joints to move freely within a certain range. This invention uses a snake bone that can be bent in four directions: up, down, left, and right, and can produce combined movements under the pull of chains 4 in different directions, thus bending in the upper left, lower left, upper right, and lower right directions. The inner and outer surfaces of the snake bone structure 3 are covered with soft insulating material to achieve insulation and ensure the flexible bending of the snake bone. Since this is existing technology, it will not be described in detail here.

[0053] The knob mechanism 5 is rotatably connected to the handle 1, and one end of the knob mechanism 5 extends into the receiving cavity 10 and engages with the two chains 4 respectively. The two free ends of each chain 4 pass through the corresponding two rows of thread holes 30 and are connected to the edge of the suspended end of the snake structure 3. The knob mechanism 5 is designed to drive the two chains 4 to move individually or drive the two chains 4 to rotate simultaneously, so that the snake structure 3 can be flexibly bent in multiple directions such as up, down, left, right, upper right, and upper left.

[0054] Furthermore, such as Figure 2 and Figure 6 As shown, the knob mechanism 5 includes a first tube 50, a second tube 51, a first knob 52, a second knob 53, and two drive sprockets 54.

[0055] The first tube 50 is rotatably connected to the handle 1. One end of the first tube 50 is arranged outside the handle 1, and the other end of the first tube 50 is arranged in the receiving cavity 10 and fixedly connected to a drive sprocket 54. The second tube 51 is rotatably connected to the first tube 50 and arranged coaxially with the first tube 50. One end of the second tube 51 protrudes from the first tube 50 and is engaged with the second knob 53. The other end of the second tube 51 protrudes from the first tube 50 and is fixedly connected to another drive sprocket 54. The first knob 52 is fixed on the outer peripheral wall of the first tube 50.

[0056] Specifically, by rotating the first knob 52, the operator, through the cooperation of the first tube 50 and the drive sprocket 54, drives one chain 4 to rotate, causing the snake structure 3 to bend upwards and downwards. Similarly, when the operator rotates the second knob 53, through the cooperation of the second tube 51 and the drive sprocket 54, the operator drives another chain 4 to rotate, causing the snake structure 3 to bend to the left and right. If the operator rotates the first knob 52 and the second knob 53 simultaneously, making them rotate synchronously (synchronously in the same direction or synchronously in opposite directions), then the first tube 50 and the second tube 51 will work together, synchronously driving their respective drive sprockets 54 to rotate the two chains 4, causing the snake structure 3 to bend in a combination of directions, such as upwards to the right, upwards to the left, downwards to the right, and downwards to the left. Through this control, the chains 4 can bend the snake structure 3 flexibly in multiple directions, such as upwards, downwards, left, right, upwards to the right, and upwards to the left, demonstrating a high degree of flexibility and controllability.

[0057] In one embodiment of this utility model, such as Figure 2 and Figure 10 As shown, the chain 4 includes two guide wires 40, two spring tubes 41, and a meshing section 42 that matches the drive sprocket 54.

[0058] The meshing section 42 is fixed between the two guide wires 40 for connecting the two guide wires 40, and the meshing section 42 meshes with the drive sprocket 54.

[0059] It should be noted that the meshing segment 42 can be a beaded chain segment 420 composed of multiple beads arranged at equal intervals (see reference). Figure 2 (As shown) or a chain segment composed of chain links, and there is a rim between the meshing section 42 and the drive sprocket 54 to increase the stability when the meshing section 42 and the drive sprocket 54 are meshed, which can be selected according to the actual situation.

[0060] As one possible scenario, refer to Figure 14 In order to reduce the lateral displacement of the ball chain segment 420 during transmission, circular baffles 43 with hollow centers can be set on both sides of the drive sprocket 54, so that the ball chain segment 420 rotates in a limited space between the two circular baffles 43, thereby constraining the lateral displacement of the ball chain segment 420 during transmission and improving the stability of transmission. Since this is existing technology, it will not be elaborated on here.

[0061] The end of the traction guide wire 40 away from the engagement section 42 passes through the corresponding thread hole 30 and is connected to the edge of the suspended end of the snake bone structure 3. The spring tube 41 is wrapped around the outer periphery of the traction guide wire 40, and the traction guide wire 40 and the spring tube 41 are in clearance fit. At least part of the spring tube 41 inside the sheath tube 2 is fixed to the inner wall of the sheath tube 2.

[0062] The spring tube 41 surrounds the guide wire 40 (excluding the meshing section 42), with a gap between them. This ensures that the guide wire 40 can move smoothly relative to the spring tube 41 under the drive of the drive sprocket 54, while the position of the spring tube 41 remains fixed. This effectively limits the movement of the guide wire 40, and the elasticity and flexibility of the spring tube 41 can accommodate the slight displacement and deformation of the guide wire 40 during movement. This reduces direct contact and friction between adjacent guide wires 40, ensuring that the guide wire 40 maintains a stable trajectory during driving and reducing the risk of entanglement between guide wires 40. The portion of the spring tube 41 that runs inside the sheath 2 can be fixed to the four walls of the sheath 2 without interfering with the movement of the hollow guide wire 6.

[0063] Specifically, refer to Figure 12 When the drive sprocket 54 begins to rotate, it drives the meshing section 42, which meshes with it, to rotate synchronously. This rotation pulls on the traction guide wire 40 connected to the meshing section 42, causing it to move. As the traction guide wire 40 moves under tension, it applies a pulling force to one end of the snake-bone structure 3. Under the action of the pulling force, the snake-bone structure 3 will undergo corresponding bending deformation. While the snake-bone structure 3 bends, it also causes the hollow guide wire 6 to bend accordingly. Ultimately, this bending deformation is transmitted to the blade 7, thereby changing its cutting angle, allowing the surgical operation to more precisely adapt to different cutting needs.

[0064] One end of the hollow guide wire 6 is connected to the water injection port 11 and is rotatably connected to the water injection port 11. The conductive insert 12 is rotatably connected to the hollow guide wire 6.

[0065] Specifically, the hollow guide wire 6 can be kept in a rotating and connected state with the water injection interface 11 through a water pipe rotary joint, while the conductive core 12 can be electrically connected to the hollow guide wire 6 through conductive slip rings or rotary connectors, ensuring a stable electrical connection with the hollow guide wire 6 during rotation. This design allows the hollow guide wire 6 to rotate relative to the water injection interface 11 and the conductive core 12. When the hollow guide wire 6 changes its bending angle, especially when the hollow guide wire 6 drives the cutter head 7 to rotate and change the cutting angle, compared to a fixed connection between the hollow guide wire 6 and the water injection interface 11 and the conductive core 12, the tensile stress at the connection point can be reduced, improving the stability and reliability of the connection between the hollow guide wire 6 and the water injection interface 11 and the conductive core 12.

[0066] The other end of the hollow guidewire 6 passes through the snake bone structure 3 and extends to the outside of the snake bone structure 3. The end of the hollow guidewire 6 away from the receiving cavity 10 is connected to the blade head 7, and the end of the blade head 7 away from the hollow guidewire 6 is provided with a water outlet 70. The hollow guidewire 6 is internally insulated, so physiological saline or other liquids can be injected into the hollow guidewire 6 through the water injection interface 11 by a water pump or syringe, and then sprayed out through the water outlet 70 of the blade head 7. The injection of water can replenish water and at the same time separate the mucosa from the submucosa and the muscularis propria to form a water cushion. This helps to more clearly identify the boundary between the lesion tissue and the surrounding normal tissue, and at the same time makes the resection process more precise.

[0067] It should be noted that this can be used as a reference. Figure 3 and Figure 13 In this embodiment, the front end of the blade 7 is a triangular blade. However, the front end of the blade 7 can also be configured as a needle-shaped blade 71, a hook-shaped blade 72, a front-end insulated hemispherical blade 73, or other shapes required for surgery.

[0068] Button 8 is movably mounted on handle 1. One end of button 8 extends into receiving cavity 10 and is rotatably connected to hollow guide wire 6. Button 8 is used to push hollow guide wire 6 to drive the blade head 7 to extend or retract into snake bone structure 3, thereby controlling the position of blade head 7 to avoid unnecessary damage. By controlling the movement of button 8, the operator can precisely control the extension length and position of blade head 7, thereby achieving precise removal of diseased tissue.

[0069] Furthermore, such as Figure 8 As shown, button 8 includes a limit block 80, a push button 81, and a collar 82.

[0070] The handle 1 has a groove 100 and a through groove 101 connected to each other. The limiting block 80 is I-shaped and can be slidably connected in the through groove 101. One end of the limiting block 80 is located in the groove 100 and the other end is located in the receiving cavity 10. The push key 81 is arranged outside the handle 1 and one end of the push key 81 is fixed on the limiting block 80. The collar 82 is fixed on the limiting block 80 and is rotatably connected to the hollow guide wire 6.

[0071] It should be noted that since the limiting block 80 is made of rubber, there is friction between the limiting block 80 and the groove 100. The operator needs to apply a certain force to push the push key 81 to overcome this friction and cause the push key 81 to move, thereby changing the position of the cutter head 7. This design not only ensures the reliability of operation, but also ensures the stability of the position of the cutter head 7 after adjustment, thereby improving the accuracy of the cutter head 7 during cutting.

[0072] Specifically, in the non-operating state, the blade 7 retracts and is hidden inside the snake-bone structure 3. In the operating state (i.e., when removing a lesion), the operator simply applies a pushing force towards the sheath 2, pushing the push button 81. With the synergistic action of the limiting block 80 and the collar 82, the hollow guidewire 6 can be effectively extended from the snake-bone structure 3, thus exposing the blade 7. Conversely, if the surgery is finished and the blade 7 needs to be retracted back into the snake-bone structure 3, the operator simply reverses the operation, pushing the push button 81 away from the sheath 2, to easily retract the blade 7. This design not only simplifies operation but also ensures safety and accuracy during the surgical procedure.

[0073] In one embodiment of this utility model, such as Figure 6 As shown, the knob mechanism 5 may further include an inner ring 55, an outer ring 56, and a push rod 560. The inner ring 55 is fixed on the handle 1 and is located between the first knob 52 and the handle 1. The outer ring 56 is threaded onto the inner ring 55 and can be abutted against the first knob 52. The push rod 560 is disposed on the outer ring 56 and one end of the push rod 560 extends outside the first knob 52.

[0074] It should be noted that the outer ring 56 has internal and external threads on its outer peripheral wall, and the inner ring 55 has internal threads on its outer peripheral wall. The internal threads are compatible with the external threads, so that the outer ring 56 can be threaded onto the inner ring 55.

[0075] Specifically, through a cleverly designed engagement mechanism between the inner ring 55 and the outer ring 56, the outer ring 56 can be tightly fitted against the side of the first knob 52, effectively locking the angle of the first knob 52 after rotation. That is, by pushing the push rod 560, the operator can drive the outer ring 56 towards the first knob 52, causing one end of the outer ring 56 to tightly adhere to the surface of the first knob 52, thus firmly locking the first knob 52 and preventing its rotation. Simultaneously, it locks the angle of the bend driven by the snake-bone structure 3 and the hollow guide wire 6 to the cutter head 7. Furthermore, the push rod 560 further enhances operational convenience, allowing the operator to easily rotate the outer ring 56, achieving more flexible and efficient operational control.

[0076] In one embodiment of this utility model, such as Figure 6 and Figure 7As shown, the knob mechanism 5 also includes a screw 57 and a nut 58. A slot 510 is provided on the outer peripheral wall of the second tube 51 near the end of the second knob 53. A block 59 is provided on the inner peripheral wall of the second knob 53. The block 59 can be slidably inserted into the slot 510. The design of the slot 510 and the block 59 allows the second knob 53 to drive the second tube 51 to rotate through the block 59 and the slot 510 when it rotates, thereby driving the corresponding drive sprocket 54 to rotate.

[0077] One end of the screw 57 is fixed in the receiving cavity 10, and the other end of the screw 57 passes through the second tube 51 and extends to the outside of the second tube 51. The nut 58 is threadedly connected to the screw 57 and can move axially relative to the second tube 51 to abut against one end of the second tube 51. The nut 58 is provided with an internal thread groove at one end relative to the second tube 51, and the internal thread groove is adapted to the external thread of the screw 57 so that the nut 58 and the screw 57 are threadedly connected.

[0078] Specifically, by rotating the nut 58, the nut 58 can be moved towards the second tube 51 until it abuts against the second tube 51. Since the screw 57 is fixed and the nut 58 is threaded onto the screw 57, the rotation direction of the second tube 51 can be locked when the nut 58 abuts against the second tube 51, thereby locking the rotation angle of the second knob 53. This, in turn, locks the angle after the snake bone structure 3 drives the hollow guide wire 6 to bend the blade head 7, ensuring the accuracy of surgical cutting.

[0079] As one possible scenario, the length of the locking block 59 is the same as that of the locking slot 510, ensuring that after the locking block 59 is fully inserted into the locking slot 510, the end face of the second knob 53 can remain flat and aligned with the end face of the second tube 51 away from the first knob 52. With this arrangement, when the end face of the nut 58 abuts against the end face of the second tube 51, it can also contact the end face of the second knob 53. This dual contact significantly increases the contact area of ​​the nut 58 when fixing the second tube 51, thereby improving the stability of the second knob 53 after rotation.

[0080] In one embodiment of this utility model, such as Figure 9 As shown, this mucosal incision knife also includes a rocker arm 9. An arc-shaped groove 20 is provided on the sheath tube 2, and the arc-shaped groove 20 is located adjacent to the rocker arm 9. The arc of the arc-shaped groove 20 is set to 180° to 270°. One end of the rocker arm 9 is fixed to the hollow guide wire 6, and the other end of the rocker arm 9 extends through the arc-shaped groove 20 to the outside of the sheath tube 2. The rocker arm 9 is made of plastic, so that it can achieve an insulated connection with the hollow guide wire 6.

[0081] Specifically, by moving the rocker arm 9 left and right, the operator can drive the rocker arm 9 to rotate, which in turn causes the hollow guide wire 6 connected to it to rotate. This rotational action directly affects the blade head 7 connected to the hollow guide wire 6, causing its cutting angle to change accordingly. This design is particularly suitable for the hook-shaped blade head 72, because the hook-shaped blade head 72 can more flexibly adjust the cutting direction during rotation, thereby meeting the needs of cutting at different angles during surgery. In this way, the operator can more precisely control the cutting process, improving the efficiency and safety of the surgery.

[0082] Furthermore, such as Figure 9 As shown, a rubber ring 90 is fitted on the outer peripheral wall of the rocker arm 9. The rubber ring 90 elastically abuts against the inner wall of the arc groove 20. The elastic deformation of the rubber ring 90 can increase the friction between the rocker arm 9 and the inner wall of the arc groove 20, so that the rocker arm 9 can be fixed at any position after swinging, thereby ensuring the stability of the angle of the cutter head 7 after the hollow guide wire 6 rotates.

[0083] In one embodiment of this utility model, such as Figure 9 and Figure 10 As shown, this mucosal incision knife may also include a limiting plate 21, which is fixed at the communication interface between the sheath 2 and the receiving cavity 10. The limiting plate 21 is provided with a first through hole 210 and four second through holes 211.

[0084] The first through hole 210 is centrally located on the limiting plate 21, and the four second through holes 211 are symmetrically arranged in pairs. The four second through holes 211 are arranged below the hollow guide wire 6 to avoid the multiple chains 4 interfering with the movement of the rocker arm 9 in the arc groove 20. The hollow guide wire 6 passes through the first through hole 210, and the multiple chains 4 pass through the corresponding second through holes 211.

[0085] Specifically, the first through hole 210 and the second through hole 211 on the limiting plate 21 can limit the traction path of the hollow guide wire 6 and the chain 4, ensuring the stability of the hollow guide wire 6 and the chain 4 when they move.

[0086] Furthermore, the second through hole 211 is covered with insulating material, which can prevent the limiting disk 21 from becoming conductive and ensure safety during use.

[0087] In summary, the mucosal incision knife of this utility model embodiment can be bent at multiple angles, greatly expanding its scope of application and making it more convenient for clinical operation.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mucotome, characterized by, include: The handle has an internal cavity, a water inlet and a conductive plug, and one end of the water inlet and the conductive plug both extend into the cavity. A sheath tube, one end of which is connected to the receiving cavity, and the other end of which is fitted with a snake bone structure. The end of the snake bone structure away from the sheath tube is suspended in the air, and the inner peripheral wall of the snake bone structure is provided with four rows of symmetrically arranged threading holes. The knob mechanism and two chains are provided. The knob mechanism is rotatably connected to the handle, and one end of the knob mechanism extends into the receiving cavity and engages with the two chains respectively. The two free ends of each chain pass through two rows of corresponding thread holes and are connected to the edge of the suspended end of the snake bone structure. A hollow guide wire, one end of which is connected to the water inlet and rotatably connected to the water inlet, a conductive insert rotatably connected to the hollow guide wire, and the other end of which passes through the snake bone structure and extends to the outside of the snake bone structure. A blade is connected to the end of the hollow guide wire away from the receiving cavity, and a water outlet is opened at the end of the blade away from the hollow guide wire. A button is movably mounted on the handle, with one end of the button extending into the receiving cavity and rotatably connected to the hollow guide wire. The button is used to push the hollow guide wire to drive the cutter head to extend or retract into the snake structure.

2. The mucotome according to claim 1, wherein The knob mechanism includes a first tube, a second tube, a first knob, a second knob, and two drive sprockets, wherein... The first tube is rotatably connected to the handle, one end of the first tube is arranged outside the handle, and the other end of the first tube is arranged in the receiving cavity and fixedly connected to one of the drive sprockets. The second tube is rotatably connected to the first tube and is arranged coaxially with the first tube. One end of the second tube protrudes from the first tube and is engaged with the second knob. The other end of the second tube protrudes from the first tube and is fixedly connected to another drive sprocket. The first knob is fixed to the outer peripheral wall of the first tube.

3. The mucosal incision knife according to claim 2, characterized in that, The knob mechanism further includes an inner collar, an outer collar, and a push rod, wherein... The inner collar is fixed to the handle, and the inner collar is located between the first knob and the handle; The outer sleeve is threaded onto the inner sleeve, and the outer sleeve is in contact with the first knob. The push rod is mounted on the outer ring, and one end of the push rod extends beyond the first knob.

4. The mucotome according to claim 2, wherein The knob mechanism further includes a screw and a nut. A groove is provided on the outer peripheral wall of the second tube near the end of the second knob. A locking block is provided on the inner peripheral wall of the second knob. The locking block can be slidably inserted into the groove. One end of the screw is fixed in the receiving cavity. The other end of the screw passes through the second tube and extends to the outside of the second tube. The nut is threadedly connected to the screw and can move axially relative to the second tube to abut against one end of the second tube.

5. The mucosal incision knife according to claim 1, characterized by The chain includes two guide wires, two spring tubes, and a meshing section that matches the drive sprocket, wherein, The meshing section is fixed between two guide wires for connecting the two guide wires and meshes with the drive sprocket. The end of the traction guide wire away from the engagement section passes through a corresponding threading hole and connects to the edge of the suspended end of the snake bone structure. The spring tube is wrapped around the outer periphery of the traction guide wire, and the traction guide wire and the spring tube are in clearance fit. At least a portion of the spring tube inside the sheath is fixed to the inner wall of the sheath.

6. The mucotome according to claim 5, wherein The button includes a limit block, a push key, and a collar, wherein... The handle has a groove and a through groove, the groove and the through groove are connected, the limiting block is I-shaped, the limiting block is slidably connected in the through groove, one end of the limiting block is located in the groove, the other end of the limiting block is located in the receiving cavity, the push key is arranged outside the handle, and one end of the push key is fixed on the limiting block; The collar is fixed on the limiting block, and the collar is rotatably connected to the hollow guide wire.

7. The mucosal incision knife according to claim 1, characterized by It also includes a rocker arm, an arc-shaped groove is provided on the sheath tube and the arc-shaped groove is located adjacent to the rocker arm, one end of the rocker arm is fixed on the hollow guide wire, and the other end of the rocker arm extends through the arc-shaped groove to the outside of the sheath tube.

8. The mucotome according to claim 7, wherein A rubber ring is fitted on the outer peripheral wall of the rocker arm, and the rubber ring elastically abuts against the inner wall of the arc-shaped groove.

9. The mucosal incision knife according to claim 1, characterized by It also includes a limiting plate, which is fixed at the communication interface between the sheath and the receiving cavity. The limiting plate has a first through hole and four second through holes. The first through hole is centrally located on the limiting plate, and the four second through holes are arranged below the hollow guide wire. The hollow guide wire passes through the first through hole, and the multiple chains pass through the corresponding second through holes.

10. The mucotome according to claim 9, wherein The second through hole is covered with insulating material.

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