Endoscopic mucosal incision knife capable of lifting underlying tissue

Abstract

The present invention discloses an endoscopic mucosal incision knife capable of elevating protruding tissue, which relates to the technical field of surgical instruments and can solve the problem that in mucosal stripping, after peeling off part of the tissue with one instrument, the remaining small part of the tissue cannot be effectively elevated after being elevating. An endoscopic mucosal incision knife capable of elevating protruding tissue according to an embodiment of the present invention comprises a double-channel sheath having a first channel and a second channel, and a cutting assembly respectively arranged in the first channel and the second channel and a pushing assembly for pushing the protruding tissue to elevate, wherein: the pushing assembly comprises a bendable and deformable pushing strip, and a pushing end fixed to the end of the pushing strip, the pushing strip is located in the second channel and can extend out of the second channel; when the pushing strip extends out of the second channel, there is an angle between the pushing strip and the cutting assembly.

Description

Technical Field

[0001] The invention relates to the technical field of surgical instruments, and in particular to an endoscopic mucosal incision knife capable of lifting underlying tissues. Background Art

[0002] Mucosal cutters are generally used for endoscopic mucosal dissection. The operator inserts the mucosal cutter into the patient's body through the forceps port of the endoscope to mark or remove the lesion. The general surgical process is: marking, submucosal injection (the purpose is to bulge the mucosa), incision, and wound treatment. Among them, bulging is a prerequisite for incision. Without submucosal bulging, mucosal dissection and resection cannot be performed.

[0003] At present, endoscopic injection needles are usually used for elevation, and some incision knives also have the function of injection elevation. However, when the elevation part is cut about two-thirds, no matter which method is used for elevation, the elevation fluid injected into the submucosal layer will flow out, resulting in elevation failure, and the diseased tissue and the primary tissue will lie together and cannot be incised.

[0004] In order to solve the above problems, there are many attempts such as body position adjustment traction, metal clip elastic ring combined traction technology, magnetic anchor traction technology, etc. However, there are problems such as some angles cannot be pulled or additional fixation and equipment are required for traction.

[0005] Based on this background, the inventor has designed an endoscopic mucosal incision knife that can lift the underlying tissue to solve at least one of the above problems, and thus proposed the present application. Summary of the invention

[0006] The purpose of the present application is to provide an endoscopic mucosal incision knife that can lift protruding tissue, so as to solve the problem that in mucosal dissection, after peeling off part of the tissue with one instrument, the remaining small part of the tissue cannot be effectively lifted after lying down.

[0007] In order to solve the above technical problems, the present invention adopts the following solutions:

[0008] The present application provides an endoscopic mucosal incision knife capable of raising protruding tissue, comprising a double-channel sheath having a first channel and a second channel, and a cutting assembly respectively arranged in the first channel and the second channel and a pushing assembly for pushing the protruding tissue to raise, wherein:

[0009] The pushing assembly includes a pushing soft strip that can be bent and deformed, and a pushing end fixed to the end of the pushing soft strip, and the pushing soft strip is located in the second channel and can extend out of the second channel;

[0010] When the pushing soft strip extends out of the second channel, an angle is formed between the pushing soft strip and the cutting assembly.

[0011] Optionally, the dual-channel sheath is further provided with a slope groove for changing the extension direction of the push soft strip, and the bottom of the slope groove is located at the end of the second channel.

[0012] Optionally, the angle between the inclined surface of the slope groove and the central axis of the double-channel sheath is an acute angle.

[0013] Optionally, the first channel includes an expanded diameter section located below the slope groove and an insulating seat installation section located at the end of the double-channel sheath tube;

[0014] The cutting assembly includes a conductive hose and a cutting electrode head, and an insulating mounting seat;

[0015] A liquid spray port is provided on the cutting electrode head;

[0016] The insulating mounting seat is installed and fixed in the insulating seat mounting section at the end of the first channel;

[0017] The conductive hose is located in the first channel and can slide freely in the first channel, and the conductive hose is communicated with the liquid injection port of the cutting electrode head through the insulating mounting seat.

[0018] Optionally, the second channel includes a soft strip segment for limiting the self-rotation of the push soft strip along its axis;

[0019] The cross-sectional shape of the soft strip segment is adapted to the shape of the push soft strip.

[0020] Optionally, at least a portion of the cross-sectional shape of the push soft strip is an angular cross-sectional shape or any one of a round, oval, and gourd shape;

[0021] The size of the push end head is larger than that of the first channel, and the shape of the push end head is any one of hemispherical, spherical, cylindrical and prismatic.

[0022] Optionally, it also includes a handle body, on which a slide groove section is provided;

[0023] The push assembly also includes a sliding sleeve sleeved on the slide groove section and slidably connected thereto, and a push hard strip having one end fixed on the sliding sleeve and the other end coaxially fixedly connected to the push soft strip;

[0024] The second channel comprises a hard bar section, and the push hard bar is located in the hard bar section and can slide freely inside the hard bar section.

[0025] Optionally, the sliding sleeve is further provided with an elastic ring sleeved on the sliding groove section.

[0026] Optionally, the end of the handle body away from the slide groove section is further provided with a spring installation groove and a bayonet structure located on the side wall of the spring installation groove, and the side wall of the spring installation groove is further provided with an elastic pressing structure;

[0027] A limit block is provided between the elastic pressing structure and the bayonet structure;

[0028] It also includes a slider with one end located in the spring installation groove and the other end extending out of the handle body, one end of the cutting assembly is fixed to the slider, and a block structure adapted to the bayonet structure is provided on the slider;

[0029] The slider is also provided with a reduced diameter cavity located inside the block structure;

[0030] It also includes a return spring with one end pressing on the end wall of the spring installation groove and the other end pressing on the sliding block.

[0031] Optionally, it further includes a first power connection component electrically connected to the cutting component, and a second power connection component electrically connected to the pushing component;

[0032] The push-up end head and the push-up soft strip are both made of conductive metal material.

[0033] Beneficial effects of the present invention:

[0034] 1. The present application provides a dual-channel sheath, and provides a cutting component and a pushing component located in the dual-channel sheath, so that the present application can first inject liquid into the mucosal tissue to make it bulge and perform a preliminary cutting action. After the raised mucosa is cut, the liquid in the raised mucosal tissue flows out, causing the mucosa to lie down. The present application can use the pushing soft strip extending from the second channel to push the pushing end, so that the pushing end is inserted between the lying tissue and the grassroots tissue, and the pushing end is continued to be pushed so that the pushing end is hooked and supports the lying tissue, so that the lying tissue can continue to bulge, and the effect of continuous retraction of the distal end of the raised mucosal tissue is maintained, which facilitates the cutting of the raised mucosal tissue and effectively solves the problem that in mucosal stripping, after stripping part of the tissue with one instrument, the remaining small part of the tissue cannot be effectively bulged after lying down.

[0035] 2. The pushing terminal and the pushing soft strip of the present application are both made of conductive materials, and the present application not only has a first power connection component for conducting electricity to the cutting component, but also has a second power connection component for conducting electricity to the pushing terminal, so that the present application can form a current path of the first power connection component, the cutting electrode head, the mucosal tissue, the pushing terminal, and the second power connection component during the operation. The distance of the current path through the human tissue is extremely short, which is safer than the previous use of a single conductive cutting terminal, which requires the attachment of an electrical connection sheet on the surface of the human body for connecting the current return, resulting in a long distance in the human tissue for the current loop. In addition, the second power connection component, the pushing terminal, the pushing soft strip and other structures of the present application can be used as a backup for the cutting component. Once a problem occurs with the cutting component during the operation, the second power connection component, the pushing terminal, and the pushing soft strip can be used as an emergency electrocoagulation cutting structure.

[0036] 3. The handle body of the present application is also provided with a spring installation groove and a reset spring located in the spring installation groove, and the side wall of the spring installation groove of the handle body is also provided with a bayonet structure and an elastic pressing structure, as well as a limit block between the elastic pressing structure and the bayonet structure. At the same time, a slider located in the spring installation groove is also provided, and a block structure is also provided on the slider, so that after the cutting component of the present application is pushed out of the dual-channel sheath by the slider, the elastic pressing structure is directly pressed, and under the push of the reset spring, the cutting component, slider and other structures can rebound and reset, thereby achieving the technical effect of "one-button rebound". BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic cross-sectional structural diagram of the push assembly of Example 1 of the present application in a retracted state.

[0038] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0039] Figure 3 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0040] Figure 4 This is a schematic structural diagram of the push assembly of Example 1 of the present application in a retracted state.

[0041] Figure 5 It is a schematic cross-sectional structural diagram of the push assembly of Example 1 of the present application in a semi-extended state.

[0042] Figure 6 This is a schematic cross-sectional structural diagram of the push assembly of Example 1 of the present application in an extended state.

[0043] Figure 7 for Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0044] Figure 8 This is a schematic diagram of the three-dimensional structure of the push end in Example 1 of the present application.

[0045] Fig. 9 This is a schematic diagram of the cross-sectional structure of Example 2 of the present application.

[0046] Fig.10 This is a structural diagram of Example 2 of the present application.

[0047] Description of reference numerals: 1-push assembly, 11-push end, 12-push soft strip, 13-push hard strip, 14-sliding sleeve, 15-elastic ring, 2-dual-channel sheath, 21-first channel, 211-expanded diameter section, 212-insulating seat installation section, 22-second channel, 221-soft strip section, 222-hard strip section, 23-slope groove, 3-cutting assembly, 31-conductive hose, 32-cutting electrode head, 321-liquid spray port, 33 -insulating mounting seat, 331-through hole, 4-handle body, 41-slide section, 42-spring mounting groove, 43-elastic pressing structure, 44-bayonet structure, 45-limiting block, 5-slider, 51-Ruel connector, 52-block structure, 53-reducing cavity, 6-first power connection assembly, 61-first electrical connector, 62-first top pressure spring, 7-reset spring, 8-second power connection assembly, 81-second electrical connector, 82-second top pressure spring. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0049] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0052] Example 1

[0053] Reference Figures 1 to 8As shown, this embodiment provides an endoscopic mucosal incision knife capable of raising the underlying tissue, comprising a double-channel sheath tube 2 having a first channel 21 and a second channel 22, and a cutting assembly 3 and a pushing assembly 1 for pushing the underlying tissue to raise, respectively disposed in the first channel 21 and the second channel 22, wherein:

[0054] The pushing assembly 1 includes a push strip 12 that can be bent and deformed, and a push end 11 fixed to the end of the push strip 12. The push strip 12 is located in the second channel 22 and can extend out of the second channel 22.

[0055] When the pushing soft strip 12 extends out of the second channel 22 , an angle is formed between the pushing soft strip 12 and the cutting assembly 3 .

[0056] In this embodiment, a dual-channel sheath tube 2 is provided, and a cutting assembly 3 and a pushing assembly 1 are provided inside the dual-channel sheath tube 2, so that the present application can first inject liquid into the mucosal tissue to make it bulge and perform a preliminary cutting action. After the bulged mucosa is cut, the liquid in the bulged mucosal tissue flows out, causing the mucosa to lie down. In this embodiment, the pushing soft strip 12 extending from the second channel 22 can be used to push the pushing end 11, so that the pushing end 11 extends between the lying tissue and the primary tissue, and the pushing end 11 is continued to be pushed so that the pushing end 11 hangs on and props up the lying tissue, so that the lying tissue can continue to bulge. At this time, Figure 6 and Figure 7 As shown, the effect of continuous retraction of the distal end of the raised mucosal tissue is maintained, which facilitates the cutting of the raised mucosal tissue and effectively solves the problem that in mucosal stripping, after stripping part of the tissue with one instrument, the remaining small part of the tissue cannot be effectively raised after lying down.

[0057] Specifically, in this embodiment, if Figure 1 and Figure 2 ,as well as Figure 5 As shown, the dual-channel sheath tube 2 is also provided with a slope groove 23 for changing the extension direction of the push strip 12, and the bottom of the slope groove 23 is located at the end of the second channel 22. By providing the slope groove 23, when the push strip 12 extends out of the second channel 22, due to the restriction of the slope groove 23, the push strip 12 will be forced to change the extension direction, so that there is a certain angle between the extended end of the push strip 12 and the first channel 21, so that the push end 11 at the end of the push strip 12 can hang on the tissue, and the push strip 12 continues to extend. Since the slope groove 23 has a limiting effect on the push strip 12, it will not bend downward, but will arch to the side away from the slope groove 23, thereby making the mucosal tissue lying down bulge, which is convenient for the cutting assembly 3 to perform further cutting, especially the distal mucosal tissue cutting.

[0058] In addition, if Figure 1 , Figure 2 and Figure 4 As shown, the present application provides a slope groove 23 so that when the pushing assembly 1 in this embodiment is in a retracted state, the pushing end 11 is located in the slope groove 23, which will not affect the movement of the dual-channel sheath 2 of the entire device in the instrument channel of the endoscope.

[0059] In some embodiments, technicians can also provide an upwardly inclined structure at one end of the second channel 22 close to the end of the outer sheath tube as needed, so that the push soft wire has an angle with the cutting assembly 3 when it is directly extended.

[0060] Specifically, in this embodiment, if Figure 1 and Figure 2 As shown, the included angle between the inclined surface of the slope groove 23 and the central axis of the dual-channel sheath tube 2 is an acute angle, and the specific angle value can be adjusted by technicians as needed, which will not be repeated here.

[0061] Specifically, in this embodiment, if Figures 1 to 3 As shown, the first channel 21 includes an expanded diameter section 211 located below the slope groove 23 and an insulating seat installation section 212 located at the end of the double-channel sheath tube 2;

[0062] The cutting assembly 3 includes a conductive hose 31, a cutting electrode head 32, and an insulating mounting seat 33;

[0063] The cutting electrode head 32 is provided with a liquid spraying port 321 for injecting liquid into the diseased mucosal tissue, so that the diseased mucosal tissue bulges;

[0064] The insulating mounting seat 33 is installed and fixed in the insulating seat mounting section 212 at the end of the first channel 21;

[0065] The conductive hose 31 is located in the first channel 21 and can slide freely in the first channel 21 , and the conductive hose 31 is connected to the liquid spraying port 321 of the cutting electrode head 32 through the insulating mounting seat 33 .

[0066] In this embodiment, the insulating mounting seat 33 is made of ceramic material, which plays the role of insulation and isolating the heat during front-end cutting. The conductive hose 31 in this embodiment is a stainless steel hose.

[0067] Specifically, in this embodiment, if Figure 2 and Figure 3 As shown, the second channel 22 includes a soft strip segment 221 for limiting the self-rotation of the push soft strip 12 along its axis, preventing the push soft strip 12 from rotating during the process of extending out of the second channel 22, and avoiding the push end 11 from rotating and shifting in position, thereby affecting the surgical operation;

[0068] The cross-sectional shape of the soft strip segment 221 matches the shape of the push soft strip 12 .

[0069] Specifically, in this embodiment, if Figure 8 As shown, at least a portion of the cross-sectional shape of the push strip 12 is a rectangular shape with edges and corners. In some embodiments, the technicians can also design the cross-sectional shape of the push strip 12 to be other shapes such as hexagonal prisms, triangular prisms, ellipses, semicircles, and oblongs, which will not be repeated here.

[0070] Specifically, in this embodiment, if Figure 1 and Figure 3 As shown, it also includes a handle body 4, and a slide groove section 41 is provided on the handle body 4;

[0071] The push assembly 1 further includes a sliding sleeve 14 which is sleeved on the slide groove section 41 and slidably connected thereto, and a push hard strip 13 which has one end fixed on the sliding sleeve 14 and the other end coaxially fixedly connected to the push soft strip 12;

[0072] The second channel 22 includes a hard strip section 222, and the push hard strip 13 is located in the hard strip section 222 and can slide freely therein. By providing the sliding sleeve 14 and the push hard strip 13, the distance that the push end 11 extends outward can be infinitely adjusted, which is convenient for doctors to operate.

[0073] Specifically, in this embodiment, if Figure 1 , Figure 5 and Figure 6 As shown, the sliding sleeve 14 is also provided with an elastic ring 15 which is sleeved on the sliding groove section 41. By providing the elastic ring 15, the sliding sleeve 14 has a certain resistance when sliding on the sliding groove section 41, and can be stopped and fixed in time, so as to facilitate the doctor to control the position of the pushing end 11.

[0074] Specifically, in this embodiment, if Figure 1 As shown, the end of the handle body 4 away from the slide groove section 41 is further provided with a spring installation groove 42 and a bayonet structure 44 located on the side wall of the spring installation groove 42, and the side wall of the spring installation groove 42 is further provided with an elastic pressing structure 43;

[0075] A limit block 45 is provided between the elastic pressing structure 43 and the bayonet structure 44;

[0076] It also includes a slider 5 with one end located in the spring installation groove 42 and the other end extending out of the handle body 4. One end of the cutting assembly 3 is fixed to the slider 5. The slider 5 is provided with a block structure 52 adapted to the bayonet structure 44.

[0077] The slider 5 is also provided with a reduced diameter cavity 53 located inside the block structure 52, so that the block structure 52 can move toward the inside of the slider 5 after being pressed, thereby passing through the limit block 45;

[0078] The invention also includes a return spring 7 , one end of which presses against the end wall of the spring installation groove 42 and the other end of which presses against the slider 5 .

[0079] The block structure 52 of this embodiment is an annular protrusion located on the slider 5 , and the annular protrusion has an inclined surface arranged toward the reset spring 7 , so that the doctor can directly push the slider 5 to move in the direction of the handle body 4 .

[0080] In this embodiment, a Luer connector 51 is provided at one end of the handle body 4 away from the return spring 7 for connecting to a liquid injection device. The Luer connector 51 is a conventional structure and will not be described in detail herein.

[0081] In this embodiment, a spring mounting groove 42 and a reset spring 7 located in the spring mounting groove 42 are provided on the handle body 4, and a bayonet structure 44 and an elastic pressing structure 43 are provided on the side wall of the spring mounting groove 42 of the handle body 4, and a limit block 45 is provided between the elastic pressing structure 43 and the bayonet structure 44. At the same time, a slider 5 is provided in the spring mounting groove 42, and a block structure 52 is also provided on the slider 5. After the cutting component 3 of this embodiment is pushed out of the dual-channel sheath 2 by the slider 5, the elastic pressing structure 43 can be directly pressed, and the cutting component 3, the slider 5 and other structures can be rebounded and reset under the push of the reset spring 7, thereby realizing the technical effect of "one-key rebound".

[0082] Example 2

[0083] On the basis of the above-mentioned embodiment 1, Fig. 9 and Fig.10 As shown, in this embodiment, it also includes a first power connection component 6 electrically connected to the cutting component 3, and a second power connection component 8 electrically connected to the pushing component 1;

[0084] The pushing end 11 and the pushing soft strip 12 are both made of conductive metal. In this embodiment, the pushing hard strip 13 of the pushing component 1 is also made of conductive metal, and the end of the pushing hard strip 13 away from the pushing soft strip 12 is conductively connected to the second power connection component 8.

[0085] The pushing end head 11, the pushing soft strip 12 and the pushing hard strip 13 in this embodiment are all made of stainless steel.

[0086] In this embodiment, the first power connection assembly 6 includes a first electrical connector 61 and a first pressure spring 62. The first pressure spring 62 is provided to ensure that the conductive hose 31 can maintain the stability of the current channel when sliding in the first channel 21. In this embodiment, the first electrical connector 61 is spirally connected to the handle body 4, and one end of the first pressure spring 62 presses on the conductive hose 31, and the other end presses on the first electrical connector 61.

[0087] In this embodiment, Fig. 9 and Fig.10 As shown, the second power connection assembly 8 has the same structure as the first power connection assembly 6, including a second electrical connector 81 and a second pressing spring 82. The second power connection assembly 8 in this embodiment is arranged on the sliding sleeve 14 structure. In this embodiment, the second electrical connector 81 is spirally connected to the sliding sleeve 14, and one end of the second pressing spring 82 presses on the pushing hard strip 13, and the other end presses on the second electrical connector 81.

[0088] In this embodiment, by setting the first power connection component 6 and the second power connection component 8, during the operation, the current path formed after the circuit is connected is the first power connection component 6, the cutting electrode head 32, the mucosal tissue, the pushing terminal 11, and the second power connection component 8. The distance of the current path through the human tissue is extremely short, which is safer than the previous use of a single conductive cutting terminal, which requires the attachment of an electrical connection sheet for connecting the current return on the surface of the human body, resulting in a longer distance in the human tissue for the current loop. In addition, the second power connection component 8, the pushing terminal 11, the pushing soft strip 12 and other structures of the present application can be used as a backup for the cutting component 3. Once a problem occurs in the cutting component 3 during the operation, the second power connection component 8, the pushing terminal 11, and the pushing soft strip 12 can be used as an emergency electrocoagulation cutting structure.

[0089] The rest of the structure of this embodiment is the same as that of the above-mentioned embodiment 1 and will not be described again here.

[0090] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An endoscopic mucosal incision knife capable of lifting underlying tissue, characterized in that: The invention comprises a double-channel sheath tube (2) having a first channel (21) and a second channel (22), and a cutting assembly (3) and a pushing assembly (1) respectively arranged in the first channel (21) and the second channel (22) for pushing the underlying tissue to bulge, wherein: The pushing assembly (1) comprises a pushing soft strip (12) that can be bent and deformed, and a pushing end head (11) fixed to the end of the pushing soft strip (12); the pushing soft strip (12) is located in the second channel (22) and can extend out of the second channel (22); When the pushing soft strip (12) extends out of the second channel (22), an angle is formed between the pushing short strip and the cutting assembly (3); The double-channel sheath tube (2) is also provided with a slope groove (23) for changing the extension direction of the push soft strip (12), and the bottom of the slope groove (23) is located at the end of the second channel (22); The first channel (21) comprises a diameter expansion section (211) located below the slope groove (23) and an insulating seat installation section (212) located at the end of the double-channel sheath tube (2).

2. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 1, characterized in that: The included angle between the inclined surface of the slope groove (23) and the central axis of the double-channel sheath tube (2) is an acute angle.

3. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 1, characterized in that: The cutting assembly (3) comprises a conductive hose (31), a cutting electrode head (32), and an insulating mounting seat (33); A liquid spray port (321) is provided on the cutting electrode head (32); The insulating mounting seat (33) is mounted and fixed in the insulating seat mounting section (212) at the end of the first channel (21); The conductive hose (31) is located in the first channel (21) and can slide freely in the first channel (21), and the conductive hose (31) is connected to the liquid spraying port (321) of the cutting electrode head (32) through the insulating mounting seat (33).

4. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 1, characterized in that: The second channel (22) comprises a soft strip segment (221) for limiting the self-rotation of the push soft strip (12) along its axis; The cross-sectional shape of the soft strip segment (221) is adapted to the shape of the push soft strip (12).

5. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 4, characterized in that: At least a portion of the cross-sectional shape of the push soft strip (12) is an angular cross-sectional shape or any one of a round, oval, and gourd shape; The size of the push end head (11) is larger than the size of the first channel (21), and the shape of the push end head (11) is any one of a hemispherical shape, a spherical shape, a cylindrical shape, and a prismatic shape.

6. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 1, characterized in that: It also includes a handle body (4), on which a slide groove section (41) is provided; The push assembly (1) further comprises a sliding sleeve (14) sleeved on the slide groove section (41) and slidably connected thereto, and a push hard strip (13) having one end fixed to the sliding sleeve (14) and the other end coaxially fixedly connected to the push soft strip (12); The second channel (22) comprises a hard strip segment (222), and the pushing hard strip (13) is located in the hard strip segment (222) and can slide freely inside the hard strip segment (222).

7. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 6, characterized in that: The sliding sleeve (14) is also provided with an elastic ring (15) sleeved on the sliding groove section (41).

8. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 6, characterized in that: The end of the handle body (4) away from the slide groove section (41) is also provided with a spring installation groove (42) and a bayonet structure (44) located on the side wall of the spring installation groove (42), and the side wall of the spring installation groove (42) is also provided with an elastic pressing structure (43); A limiting block (45) is provided between the elastic pressing structure (43) and the bayonet structure (44); It also includes a slider (5) with one end located in the spring mounting groove (42) and the other end extending out of the handle body (4), one end of the cutting assembly (3) is fixed to the slider (5), and a clamping block structure (52) adapted to the bayonet structure (44) is provided on the slider (5); The slider (5) is further provided with a reduced diameter cavity (53) located inside the clamping block structure (52); It also includes a return spring (7) with one end pressing against the end wall of the spring installation groove (42) and the other end pressing against the slider (5).

9. The endoscopic mucosal incision knife capable of lifting the underlying tissue according to claim 1, characterized in that: It also includes a first power connection assembly (6) electrically connected to the cutting assembly (3), and a second power connection assembly (8) electrically connected to the pushing assembly (1); The pushing end head (11) and the pushing soft strip (12) are both made of conductive metal material.

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