Internal hemorrhoid ligator for endoscope

Abstract

The invention relates to the technical field of medical instruments, and discloses an internal hemorrhoid ligator for an endoscope. The ligator comprises a ligator body, a conversion device, a release traction device and an elastic ligature device. One end of the ligator body is a suction cavity, the other end of the ligator body is used for being connected with a lens of an endoscope, the front end telescopic structure is used for being sleeved with the elastic ligature device and connected with the release traction device, and under driving of the release traction device, the ligator body can execute telescopic movement of the telescopic structure so as to complete release operation of the elastic ligature device. A channel for endoscopic instruments to pass through is formed in the conversion device, and the two ends of the conversion device are connected with the forceps channel opening and the forceps channel cap respectively to provide an operation channel and a supporting foundation for the whole ligator; the release traction device is fixed on the conversion device, and the reliable release of the elastic ligature device is finally realized by controlling the movement stroke of the ligator body; and the elastic ligature device is arranged on the telescopic structure of the ligator body in a sleeving manner, and is tightened to ligate the internal hemorrhoids after being separated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an endoscopic hemorrhoid ligation device. Background Technology

[0002] With the development of endoscopic treatment for internal hemorrhoids, clinical practice has revealed that the mucosal ball ligated with rubber bands under endoscopic guidance is small, making early dislodgement of the bands common after endoscopic hemorrhoid ligation, thus affecting treatment outcomes. Furthermore, the tightness of the rubber bands may not achieve the desired ligation effect.

[0003] Furthermore, if endoscopic ligation of internal hemorrhoids is required in conjunction with sclerotherapy or other procedures, the ligation device must be repeatedly disassembled and reassembled, which is cumbersome and time-consuming, and the loop is prone to falling off during the assembly and disassembly process.

[0004] To address the aforementioned problems, the inventors proposed an endoscopic internal hemorrhoid ligation device to solve them. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the present invention provides an endoscopic hemorrhoid ligation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: including a ligator body, a conversion device, a release traction device, and an elastic ligation thread device; The ligator body has a working channel that extends forward and backward inside. Its front end is a suction cavity and a support part for carrying the elastic ligation suture device. Its rear end is used to connect the lens of the endoscope. Conversion device: used to connect the forceps port and forceps cap of the endoscope and to provide an operating channel for endoscopic instruments; Release traction device: fixed on the conversion device and operably connected to the support part of the ligator body, used to drive the support part to perform a release action so that the elastic ligation suture device is disengaged from the support part; Elastic ligation suture device: installed on the bearing part, used for ligating internal hemorrhoids after detachment.

[0007] Preferably, the ligator body is partially or fully transparent, which greatly reduces the impact on the endoscopic field of view.

[0008] Preferably, the supporting part is a movable member that can move relative to the ligator body, and the release traction device changes its support state on the elastic ligation device by driving the movable member to move in order to complete the release.

[0009] Preferably, the front end of the ligator body is provided with a groove, the movable component is a release baffle that is slidably disposed in the groove, and an elastic element is provided between the release baffle and the bottom of the groove.

[0010] In one specific structure of the support unit, the front end of the ligator body is provided with a groove, and a movable release baffle is provided in the groove. The internal space defined by the release baffle constitutes an area for accommodating the target internal hemorrhoid. The release baffle and the bottom of the groove are connected by a release spring. The upper part of the release baffle is used to sleeve an elastic ligation suture device, and the bottom of the release baffle is connected to a release traction device. In the natural state, under the action of the release spring, the release baffle is kept in the position of extending out of the groove. At this time, the elastic ligation suture device sleeved on the outside of the baffle is in a ready state. When the release traction device is operated to apply a pulling force, the release baffle overcomes the elastic force of the release spring and retracts back along the groove. The retraction movement of the baffle causes it to disengage from the elastic ligation suture device sleeved on it, thereby realizing the reliable release and ligation of the internal hemorrhoid by the elastic ligation suture device.

[0011] Preferably, the release and pulling device includes an operating part, a locking mechanism, and a traction element; The operating part is movably mounted on the conversion device, and its position can be selectively fixed by the locking mechanism; One end of the traction member is connected to the operating part, and the other end extends and is connected to the support part of the ligator body; The state of the bearing unit is controlled by the traction member by operating the control unit and fixing it with the locking mechanism.

[0012] Specifically, the release traction device has a control unit that is a retainer and a traction element that is a traction line. The retainer is equipped with a locking mechanism to fix it in place. The release traction device includes a lead wire channel, a fixing groove, a traction line, and a retainer. The lead wire channel and the fixing groove are located on the side of the conversion device near the clamping opening. The retainer is movably disposed in the fixing groove. The retainer is connected to the traction line. The traction line passes through the fixing groove, through the lead wire channel, through the conversion device, through the clamping opening and clamping channel, and then connects to the ligator body. The fixing groove and the retainer cooperate with each other through the locking mechanism, so that the retainer can achieve a switchable moving state and a fixed locked state within the fixing groove. Thus, the ligator can be pulled by adjusting the position of the retainer.

[0013] Preferably, the locking mechanism includes a ratchet structure and a locking assembly that cooperates with it.

[0014] Preferably, the locking assembly includes a pair of rotatable clamping arms and a drive member. The movement of the drive member can control the opening and closing of the clamping arms. When the clamping arms are closed, they engage with the ratchet structure to achieve fixation.

[0015] Specifically, the ratchet structure consists of serrated edges on both sides of the fixing groove. The clamping arms in the locking assembly are the fixed wing and movable wing on the retainer, and the driving component is a conical cap. The fixing groove has serrated edges on both sides, which cooperate with the retainer to fix the position of the retainer. The retainer includes a movable base plate that slides within the fixing groove. The fixed wing and movable wing are integrated triangular plates that are rotatably fixed on the movable base plate. There is one fixed wing and one movable wing on each side. A spreading spring is connected between the two fixed wings on both sides. A cap core fixing post is designed in the center of the two movable wings on both sides. The top of the cap core fixing post is connected to the conical cap through a return spring.

[0016] Preferably, the elastic ligature device includes a pre-placed elastic ligature coil and a guide connected thereto, the guide being used to guide and assist in tightening the elastic ligature coil after it detaches.

[0017] Preferably, the elastic ligature coil uses a pull-out and tightenable knot.

[0018] Specifically, the elastic ligation device includes an elastic ligation coil and a guide. The elastic ligation thread is knotted to form an elastic ligation coil which is fitted onto the telescopic structure of the ligator body. The knotting method is a telescopic knot, which gradually tightens the knot by pulling one end of the knot and will not loosen on its own. The guide is connected to the pullable end of the knot to tighten the elastic ligation coil.

[0019] Preferably, the end of the elastic ligature knot that can be pulled out is provided with a connecting part that facilitates connection with the guide.

[0020] Specifically, the connecting part is an elastic ligature loop, and the elastic ligature loop is connected with a push-knot auxiliary line to facilitate connection with the guide.

[0021] Preferably, the guide includes an elongated rod with a functional portion at its distal end for capturing or connecting the elastic ligation coil.

[0022] Specifically, the guide is a push-knot rod, which includes a push-knot rod outer sleeve and a push-knot rod inner core. The push-knot rod outer sleeve has a channel for the push-knot rod inner core, the pull-out end of the elastic ligature wire, and the push-knot auxiliary line to pass through. One end of the push-knot rod inner core is designed with a hook, which can hook the push-knot auxiliary line of the elastic ligature coil.

[0023] Preferably, it also includes an anal dilator having a channel for the endoscope to pass through and an observation window at its distal end.

[0024] Specifically, an anal dilator is used to open the anus during the initial and operational phases of the procedure, providing a clear view and facilitating smooth entry of the endoscope into the anal region for ligation of internal hemorrhoids. The anal dilator has an internally extending channel for the endoscope to pass through. The anal dilator is designed with two parts: an anal canal section for insertion into the anus and a handle section for external manipulation. The anal canal section is enlarged. Currently, endoscopic ligation of internal hemorrhoids primarily uses ligation devices similar to those used for treating esophageal and gastric varices, which are relatively small. This application, due to the support of the anal dilator, allows for a larger ligation device, offering advantages in both observation and storage space.

[0025] Preferably, the anal dilator has a seal at its proximal inlet.

[0026] Specifically, the inlet of the handheld part is equipped with a ring-shaped sealing membrane made of silicone.

[0027] Preferably, the anal dilator has one or more auxiliary ports with self-sealing function on its tube wall.

[0028] Specifically, the anal dilator has an auxiliary port between the anal canal part and the handheld part. This port is made of silicone and has a central channel for specific instruments to pass through. When no instrument is inserted, the auxiliary port is closed. When an instrument is inserted, the auxiliary port is blocked by the instrument to achieve a sealing effect.

[0029] Preferably, the anal dilator further includes an inner core, which can be inserted into the channel of the anal dilator, and its distal end is provided with an inflatable fixing part.

[0030] Specifically, the inner core includes an inner core main rod, with an air bladder at the front end of the main rod and a piston device at the rear end of the inner core main rod. The piston device is connected to the air bladder to realize the inflation and deflation of the air bladder. When the air bladder is inflated, it can fill the gap between the front end of the inner core and the internal channel of the anal dilator, making it easy to insert into the anus. When the air bladder is deflated, it is easy to remove the inner core from the internal channel of the anal dilator towards the outer opening or insert it from the outer opening towards the inner opening.

[0031] The beneficial effects of this invention are as follows: (1) To overcome the limitations of current clinical endoscopic treatment techniques for internal hemorrhoids, this invention facilitates endoscopic treatment of internal hemorrhoids, allows for the ligation of larger mucosal balls, and makes the ligation more stable and less prone to slippage. (2) The present invention is designed to allow for more intuitive observation of the internal hemorrhoid area using an anal dilator, and also has an observation window to facilitate endoscopic treatment of internal hemorrhoids; (3) The present invention is designed with a conversion device that does not affect the insertion of instruments for auxiliary treatment while pulling and releasing; (4) The present invention is designed to release the traction device. By fixing and moving the fixer, the front end of the ligator body is operated to release the baffle, thereby achieving the purpose of releasing the elastic ligation device. (5) The present invention is designed with a fixator and a fixing groove, which can achieve the purpose of fixing and moving the fixator by pressing and releasing the conical cap; (6) The present invention designs an elastic ligation suture device, which will not loosen after being pushed and tightened on one side, thereby achieving the purpose of ligating hemorrhoids; (7) The present invention designs a push-knot auxiliary line, which can be easily removed after the elastic ligation device push-knot is completed, reducing the retention of suture knots in the anus and alleviating postoperative discomfort. (8) The present invention is designed to push the knot rod, which is inserted through the anal dilator to assist in treatment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the endoscopic internal hemorrhoid ligator of the present invention; Figure 2 This is a schematic diagram of the internal hemorrhoid ligator for endoscopy of the present invention within the anal dilator. Figure 3 This is a schematic diagram of the cross-sectional structure of the ligation device body of the present invention; Figure 4 This is a schematic diagram of the conversion device and the release traction device of the present invention; Figure 5 This is a schematic diagram of the structure of the conversion device and the release traction device of the present invention installed at the endoscope forceps orifice; Figure 6 This is a schematic diagram of the structure of the fixator of the present invention when it is stretched open; Figure 7 This is a schematic diagram of the structure of the retainer of the present invention when closed; Figure 8 This is a structural schematic diagram of the cross-sectional view of the fixator of the present invention; Figure 9 This is a schematic diagram of the structure of the fixator of the present invention from the side view. Figure 10 This is a schematic diagram of the structure of the fixture and the fixing groove of the present invention; Figure 11 This is a schematic diagram of the elastic ligature device of the present invention; Figure 12 This is a schematic diagram of the push rod structure of the present invention; Figure 13 This is a schematic diagram of the anal dilator of the present invention; Figure 14 This is a schematic diagram of the anal dilator of the present invention in its filled state after the inner core is inserted; Figure 15 This is a schematic diagram of the anal dilator of the present invention in the state of the inner core being deflated after insertion; Figure 16 This is a schematic diagram of the core of the present invention in its filled state; Figure 17 This is a schematic diagram of the structure of the inner core in the deflated state of the present invention; Figure 18 This is a schematic diagram of the inner piston device of the present invention; Figure 19 This is a schematic diagram of the knotting of the elastic ligature body of the present invention.

[0033] In the picture: 1. Ligator body; 11. Suction port; 12. Release baffle; 13. Groove; 14. Release spring; 15. Release lead wire; 16. Release lead wire ring; 17. Lens connector cap; 18. Suction cap; 19. Suction cavity; 110. Release lead wire channel; 111. Lens insertion port; 2. Conversion device; 21. Conversion clamp cap; 22. Conversion device body; 23. Conversion device internal passage; 24. Conversion clamp outer cap opening; 25. Conversion outer opening; 26. Conversion inner opening; 3. Release pulling device; 31. Lead wire channel; 32. Fixing groove; 33. Pull wire; 34. Pull ring; 4. Fixing device; 41. Connecting ring; 42. Fixed wing; 43. Movable wing; 44. Fixing post; 45. Core fixing post; 46. Conical cap; 47. Spreading spring; 48. Rebound spring; 49. Movable base plate; 5. Elastic ligature device; 51. Elastic ligature body; 52. Elastic ligature knot; 53. Pull-out end; 54. Elastic ligature loop; 55. Tail end; 56. Push knot auxiliary line; 57. Push knot rod outer sleeve; 58. Push knot rod inner core; 59. Push knot end; 510. Knotting loop; 511. Tightening pull-out end; 6. Anal dilator; 61. Internal opening; 62. Observation window; 63. Anal canal; 64. Auxiliary opening; 65. Handheld part; 66. External opening; 67. Annular closure membrane; 7. Endoscope; 71. Forceps orifice; 72. Lens; 73. Endoscope body; 74. Forceps channel; 8. Inner core; 81. Inner core head end; 82. Airbag; 83. Airbag connecting tube; 84. Inner core main rod; 85. Fixing part; 86. Piston device; 861. Internal space of the device; 862. Piston; 863. Piston handle; 864. Baffle; 865. Hand handle; 866. Inner space of the piston in the device; 867. Outer space of the piston in the device. Detailed Implementation

[0034] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0035] The endoscope 7 includes a lens 72, a body 73, a forceps opening 71, and a forceps channel 74.

[0036] Example 1: An endoscopic hemorrhoid ligator, used in conjunction with endoscope 7, such as... Figures 1-11 As shown, it includes a ligator body 1, a conversion device 2, a release traction device 3, and an elastic ligation suture device 5.

[0037] The ligator body 1, mounted at lens 72, is completely transparent, as shown... Figure 3 As shown, the structure includes: suction port 11, release baffle 12, groove 13, release spring 14, release lead 15, release lead ring 16, lens connecting cap 17, suction cap 18, suction cavity 19, release lead channel 110, and lens insertion port 111.

[0038] Specifically, the ligator body 1 has channels extending forward and backward for gas and liquid to pass through. The front end of the ligator body 1 has an enlarged suction cavity 19, which draws internal hemorrhoids into the suction cavity 19 through negative pressure suction. The rear end is designed with a lens connector cap 17 that matches the lens 72. During use, the lens connector cap 17's insertion port 111 tightly fits the lens 72. The diameter of the suction cavity 19 is larger than the diameter of the lens connector cap 17 to obtain a larger suction space, allowing for a larger volume of the internal hemorrhoid mucosal bulb to be sucked in. The front end of the ligator body 1 has a groove 13. The device 3 has a release baffle 12 inside. The depth of the groove 13 is greater than the length of the release baffle 12. The release baffle 12 is connected to the bottom of the groove 13 by a release spring 14. The release baffle 12 extends out of the groove 13 due to the action of the spring. At the same time, the release baffle 12 is connected to the release lead 15. When the release lead 15 is pulled, the release baffle 12 can retract into the groove 13. At this time, the elastic ligature body 51 on the release baffle 12 can be released. The release lead 15 passes through the lens insertion port 111 and ends with a release lead loop 16, which is convenient to connect with the pull ring 34 of the release pull device 3.

[0039] Conversion device 2 is connected at clamp opening 71, such as Figure 4 and Figure 5 As shown, the structure includes: a conversion clamp cap 21, a conversion device body 22, an inner channel of the conversion device 23, an outer cap opening of the conversion clamp 24, an outer conversion opening 25, and an inner conversion opening 26.

[0040] Specifically, the device includes a conversion device body 22. The conversion device body 22 has an internal conversion device channel 23 for endoscopic instruments, liquids and gases to pass through. The two ends of the internal conversion device channel 23 are a conversion outer port 25 and a conversion inner port 26, respectively. The conversion outer port 25 is provided with a conversion forceps outer cap 24, and the conversion inner port 26 is provided with a conversion forceps cap 21. A lead wire channel 31 is designed on the side near the conversion forceps cap 21. The conversion forceps cap 21 matches the forceps port 71 and can cover the forceps port 71 of the endoscope and seal the connection port there. The conversion forceps outer cap 24 matches the endoscope forceps cap and can plug the connection port of the endoscope forceps cap. A release traction device 3 is designed on the side of the conversion device body 22.

[0041] The release traction device 3, fixed to the conversion device 2, is connected to the release baffle 12 of the ligator body 1 via the traction wire 33 and the release lead wire 15, as follows: Figures 4-10 As shown, the structure includes: lead wire channel 31, fixing groove 32, pull wire 33, pull ring 34 and fixing device 4.

[0042] Specifically, the fixing groove 32 and the lead wire channel 31 are formed on the conversion device body 22. The retainer 4 is movably fixed on the fixing groove 32 and its position is adjustable. The retainer 4 is connected to the traction wire 33. The traction wire 33 passes from the fixing groove 32 through the lead wire channel 31 to the inner channel 23 of the conversion device, and then through the conversion inner opening 26, the clamping opening 71, and the clamping channel 74. The end of the traction wire 33 is set as a traction ring 34, which is connected to the release lead wire ring 16 of the ligator body 1. The size of the traction ring 34 needs to be able to fit around the ligator body 1 so that after the traction ring 34 passes through the release lead wire ring 16, the ligator body 1 can pass out of the traction ring 34, thereby realizing the connection between the traction ring 34 and the release lead wire ring 16.

[0043] Specifically, such as Figure 10 As shown, the two sides of the fixing groove 32 are serrated, cooperating with the fixator 4 to fix the position of the fixator 4. The length of the fixing groove 32 is longer than the straightening distance between the ligator body 1 and the lens 72 after the release lead ring 16 and the traction ring 34 are connected, and the length of the exposed part of the release baffle 12. The center lines of the lead channel 31 connected to the fixing groove 32 coincide, while the other side is oblique and leads to the internal channel 23 of the conversion device, which facilitates the parallel movement of the fixator 4, thereby tightening the traction line 33 to achieve the purpose of releasing the elastic ligation line body 51. The center of the fixing groove 32 is a channel for the fixator 4 to pass through. This channel has a certain degree of lubrication with the fixator 4, which helps the fixator 4 to move. The serrations on both sides cooperate with the fixator 4 to lock the fixator 4 in place.

[0044] Fixture 4, such as Figures 6-10As shown, the structure includes: a connecting ring 41, a fixed wing 42, a movable wing 43, a fixed stake 44, a cap core fixing post 45, a conical cap 46, a spreading spring 47, a rebound spring 48, and a movable base plate 49.

[0045] Specifically, the movable base plate 49 slides within the fixed groove 32, and a connecting ring 41 is provided at the tail for connecting the pull line 33. The fixed wing 42 and the movable wing 43 are a triangular plate, which is movably fixed to the fixed post 44 in the center and can rotate along the fixed post 44. There is one fixed wing 42 and one movable wing 43 on each side, and one fixed post 44 on each side. The fixed post 44 is set on the movable base plate 49. There is a spreading spring 47 in the middle of the two fixed wings 42. In the natural state, the spreading spring 47 spreads the two fixed wings 42 to the sides and locks them into the serrations on both sides of the fixed groove 32, which plays a role in fixing and limiting. The center of each movable wing 43 has a cap core fixing post 45. The cap core fixing post 45 is connected to the conical cap 46 via a spring 48. In its natural state, the spring 48 pushes the conical cap 46 open. Since the fixed wing 42 and the movable wing 43 are not on the same plane, when the conical cap 46 is pressed down, the spring 48 is pressed down, and the conical cap 46 gradually moves down to open the movable wing 43 on both sides. Through the fixing post 44, the fixed wing 42 on both sides is retracted by lever principle. At this time, the fixed wing 42 leaves the serration of the fixing groove 32, and the fixing device 4 can move freely. At the same time, with the cooperation of the serration of the fixing groove 32 and the fixed wing 42, when the conical cap 46 is not pressed, the fixing device 4 can easily slide in the direction of the conversion outer opening 25 in the fixing groove 32, and can only be locked in the direction of the conversion inner opening 26.

[0046] Elastic ligature device 5, such as Figure 11 and Figure 12 As shown, the structure includes: elastic ligature body 51, elastic ligature knot 52, pull-out end 53, elastic ligature loop 54, tail end 55, push-knot auxiliary line 56, push-knot rod outer tube 57, push-knot rod inner core 58, push-knot end 59, knot-making loop 510, and tight-knot pull-out end 511.

[0047] Specifically, the elastic ligature body 51 adopts a telescopic knot, which is tightened in one direction. A schematic diagram of the elastic ligature body 51 is shown below. Figure 19 As shown, take a piece of elastic cord (such as...) Figure 19 (As shown in A); use your left thumb and index finger to fix end A and the middle part to form a loop (as shown in A). Figure 19 As shown in B); wrap end B around the finger fixation point from the front along the direction of the arrow (as shown in B). Figure 19 B in Figure 19 As shown in C), this forms another loop (knot 510), then the B end is wrapped around the back of the finger fixing point, repeating this process 2-3 times (pull tightly when wrapping, the number of wraps depends on the friction of the elastic thread, ensuring the knot can be pushed up without loosening) to gradually form the elastic ligature knot 52 (as shown in C). Figure 19 D in Figure 19 E in Figure 19 (as shown in F); then pass end B through knot 510 (as shown in F). Figure 19 G in Figure 19 (As shown in H in the diagram). Pull the knot at end B and the tight pull-out end 511 in opposite directions to form an elastic ligature knot 52. Then, cut both ends AB short to form a pull-out end 53 and a tail end 55, respectively. The pull-out end 53 is then fixedly connected to the elastic ligature loop 54. At this point, the elastic ligature body 51 is complete.

[0048] The elastic ligation loop 54 is pulled by the push-knot auxiliary line 56, making the elastic ligation suture body 51 tighter and tighter, preventing slippage. The elastic ligation loop 54 is interlocked with the push-knot auxiliary line 56. The push-knot rod outer tube 57 and the push-knot rod inner core 58 form a push-knot rod set. The push-knot rod outer tube 57 has a channel for the push-knot rod inner core 58, the elastic ligation loop 54, the pull-out end 53, and the push-knot auxiliary line 56 to pass through. The diameter of the elastic ligation knot 52 is larger than the inner diameter of the push-knot rod outer tube 57. The length of the push-knot rod inner core 58 is longer than the push-knot rod outer tube 57. The length of the push-knot rod outer tube 57 is longer than the total length of the anal canal part 63 and the auxiliary opening 64 of the anal dilator. The inner core 58 of the push-knot rod is designed with a hook at one end to hook the push-knot auxiliary line 56. The outer tube 57 of the push-knot rod is designed to be enlarged to form the push-knot end 59 on the side near the hook of the inner core 58. The push-knot rod (with the inner core 58 fully inserted into the outer tube 57 and the hook at one end of the inner core 58 fully exposed outside the push-knot end 59) is inserted through the auxiliary port 64 of the anal dilator. After the inner core 58 hooks the push-knot auxiliary line 56, it is pulled outward. The length of the push-knot auxiliary line 56 is required to be longer than the total length of the anal canal part 63 and the auxiliary opening 64 of the anal dilator, and it can be pulled out to the outside of the auxiliary opening 64 of the anal dilator. The outer tube 57 of the push-knot rod is pushed inward, bringing the push-knot auxiliary line 56, the elastic ligation suture loop 54 and the pull end 53 into the outer tube 57 of the push-knot rod. The elastic ligation suture knot 52 is stuck outside the push-knot end 59. Through pushing and pulling, the elastic ligation suture body 51 is tightened, so as to achieve the purpose of ligating internal hemorrhoids.

[0049] Example 2: The endoscopic hemorrhoid ligator also includes an anal dilator 6, used to open the anus during the initial and operational phases of the procedure, providing a clear view and facilitating smooth entry of the endoscope into the anal region and ligation of internal hemorrhoids. Figure 13 As shown, the structure includes: an inner opening 61, an observation window 62, an anal canal 63, an auxiliary opening 64, a hand-held part 65, an outer opening 66, and an annular sealing membrane 67.

[0050] Specifically, the anal dilator 6 has an internal channel extending forward and backward for the endoscope to pass through. The two ends of the channel are an internal opening 61 and an external opening 66, respectively. One side of the internal opening 61 of the anal dilator 6 is designed with an observation window 62, allowing observation of hemorrhoids and lesions at different points in the anus by rotating the anal dilator 6. This also facilitates endoscopic procedures (endoscopic internal hemorrhoid ligation, sclerotherapy, etc.). The external opening 66 of the anal dilator 6 is designed with an annular sealing membrane 67, made of silicone and possessing a certain degree of elasticity. A central channel for the endoscope 7 to pass through is located within this membrane. The diameter of this channel is smaller than that of the endoscope 7. After the endoscope 7 is inserted, it expands the annular sealing membrane 67, effectively sealing one side of the internal channel of the anal dilator 6. This also allows the endoscope 7 and the anal dilator 6 to be connected to a certain extent through the annular sealing membrane 67, while maintaining a certain degree of movement space for the endoscope 7. The anal dilator 6 is designed in two parts: an anal canal section 63 and a handle section 65. The anal canal section 63 is enlarged, providing a larger field of view and operating space, and allowing for clear observation of its length. During operation, it prevents the anal dilator 6 from being inserted too deeply, causing damage to the intestinal wall or slipping into the intestinal lumen. The handle section 65 is made of a slightly soft material, allowing for some mobility, facilitating operation and bending after the endoscope 7 is inserted, while also providing some support, making it convenient for the operator and assistant to hold the anal dilator 6. An auxiliary port 64 is designed between the anal canal section 63 and the handle section 65, directly facing the observation window 62. This port is made of silicone and has a central channel for specific instruments. When no instrument is inserted, the auxiliary port 64 is closed. After inserting a specific instrument, the auxiliary port 64 is blocked by the instrument to achieve a sealing effect. In this application, it is used to insert a push rod.

[0051] Example 3: Anal dilator 6 paired with inner core 8, such as Figures 13-18 As shown, the inner core 8 includes an inner core head end 81, an air bladder 82, an air bladder connecting tube 83, an inner core main rod 84, a fixing part 85, and a piston device 86.

[0052] The inner core 8 has an air bladder 82 at its front end. When the air bladder 82 is inflated, it can fill the gap between the front end of the inner core 8 and the inner channel of the anal dilator 6, making it easy to insert into the anus. When the air bladder 82 is deflated, it is easy to remove the inner core 8 from the inner channel of the anal dilator 6 towards the outer opening 66 or insert it from the outer opening 66 towards the inner opening 61. The inner core main rod 84 and the fixing part 85 are designed with a piston device 86. By pulling outward or pushing inward, the purpose of deflating or inflating the air bladder 82 can be achieved. The fixing part 85 has a channel in the center for the piston rod 863 to pass through.

[0053] The piston device 86 includes an internal space 861, a piston 862, a piston rod 863, a baffle 864, a rod handpiece 865, an inner space inside the piston 866, and an outer space outside the piston 867. The piston rod 863 passes through the central channel of the fixing part 85, connected to the piston 862 on one side and to the handle part 865 on the other side; the inner piston space 866 of the piston device communicates with the airbag 82 through the airbag connecting tube 83; the piston 862 is in close contact with the inner wall of the device, thus sealing the inner piston space 866; the outer piston space 867 of the device communicates with the outside through the central channel of the inner core fixing part 85; the inner space 861 of the device includes the inner piston space 866 and the outer piston space 867; the inner piston space 866 and the outer piston space 867 increase and decrease as the piston 862 moves; the piston device 86 draws gas from the airbag 82 into the inner piston space 866 by pulling the piston rod 863 outward. A baffle 864 is designed on the outside of the device, which is connected to the inner core fixing part 85. The internal space 861 of the device and the airbag 82 have the same internal volume after being filled. When the piston rod 863 is blocked, all the gas in the airbag 82 has been drawn into the inner space 866 of the piston inside the device. At this time, the airbag 82 is in a deflated state, which makes it easy to insert the inner core 8 into or remove it from the anal dilator 6. By pushing the piston rod 863 inward, the gas in the inner space 866 of the piston inside the device passes through the airbag connecting tube 83 into the airbag 82. When the piston rod 863 is blocked inward, it means that all the gas in the inner space 866 of the piston inside the device has been filled into the airbag 82. At this time, the airbag 82 is in a full state. After applying lubricant to the end 81 of the inner core, the anal dilator 6 with the inner core 8 can be inserted into the anus.

[0054] The anal dilator 6 is used for endoscopic observation of the anus and endoscopic treatment of anal lesions. The deflated inner core 8 is inserted into the anal dilator 6 through the external opening 66. When the inner core fixing part 85 presses against the external opening 66, the inner core 8 is in place, and at this time, the inner core head 81 just protrudes from the internal opening 61 of the anal dilator 6. At this time, the handle 865 is pushed towards the inner core head 81. Through the piston handle 863 and piston 862, the gas in the inner space 866 of the piston in the device is pumped into the air bladder 82 through the air bladder connecting tube 83. When the handle 865 can no longer be pushed, all the gas in the inner space 866 of the piston in the device has been pumped into the air bladder 82, and the air bladder 82 is inflated, just filling the gap between the front end of the inner core 8 and the anal canal part 63 of the anal dilator 6, so that the front end of the anal dilator 6 is bullet-shaped.

[0055] Furthermore, the patient assumes a left lateral decubitus position. Lubricant is applied to the front end of the anal dilator 6 and the inflated inner core 8 assembly. The patient holds the anal dilator 6 handle 65 with their right hand and uses their palm to press against the piston device 86 handle 865. The patient uses their left thumb and index finger to pull open the right buttock, exposing the anus. The inner core tip 81 inside the anal dilator 6 is used to massage the anal margin to relax the anal sphincter. Then, the anal canal portion 63, inner core tip 81, and balloon 82 of the anal dilator 6 are slowly inserted towards the umbilicus. After passing through the anal canal, the dilator 6 is redirected towards the sacral fossa to enter the rectal ampulla. Note that the anal canal portion 63 of the anal dilator 6 should not be fully inserted into the anal canal at this time to prevent excessive insertion, damage to the intestinal wall, or even perforation. It also prevents the anal dilator 6 from slipping into the rectum.

[0056] The entire device of this invention is designed for endoscopic ligation treatment of internal hemorrhoids.

[0057] Remove the forceps cap at the forceps channel 71, insert the biopsy forceps retrogradely from the lens biopsy port, extend them from the forceps channel 71, use the biopsy forceps to clamp the traction ring 34 of the release traction device 3, pull it into the forceps channel 74, and pull it out from the lens biopsy port. Install the conversion device 2 at the forceps channel 71, and install the forceps cap onto the conversion port 25 of the conversion device 2. Pass the traction ring 34 through the release lead ring 16, and then pass the ligator body 1 through the traction ring 34. Straighten the ligator body 1 away from the lens, and the traction ring 34 and the release lead ring 16 can be connected. Insert the lens 72 into the lens connection cap 17 of the ligator body 1 through the lens insertion port 111, and push the conical cap 46 of the retainer 4 towards the conversion port 25. After the release baffle 12 is completely retracted into the groove 13, fix the groove 32. Continue to push the conical cap 46 of the retainer 4 slightly towards the outer opening 25. After the retaining wing 42 is released from the retaining groove 32, press the conical cap 46. The conical cap 46 gradually moves down and opens the movable wings 43 on both sides. Through the retaining post 44, using the lever principle, the retaining wings 42 on both sides are retracted. At this time, the retainer 4 is in a free state. Move the retainer 4 towards the inner opening 26. After the pull line 33 is released, the release baffle 12 is ejected by the release spring 14. Release the conical cap 46. At this time, the return force of the return spring 48 will eject the conical cap 46 from the center of the movable wings 43 on both sides. At this time, the retaining wings 42 on both sides are ejected by the elastic force of the opening spring 47. After releasing the retainer 4, the retaining wings 42 on both sides are locked in the retaining groove 32 again, which plays a fixing role.

[0058] Next, install the elastic ligation device 5. Install the elastic ligation suture body 51 and the push-knot auxiliary line 56 onto the release baffle 12. Hook the push-knot auxiliary line 56 with the inner core 58 of the push-knot rod. Push inward using the outer sleeve 57 of the push-knot rod, and gently pull outward to gently fix the elastic ligation suture body 51 onto the release baffle 12. At this point, set aside the endoscope 7, the ligator body 1, the elastic ligation suture body 51, the conversion device 2, and the release traction device 3 for later use.

[0059] Next, the anal dilator 6 is inserted into the anus for observation using the inner core 8. After removing the inner core 8 according to the steps, the assistant holds and fixes the anal dilator 6. The operator gradually inserts the endoscope 7, along with the pre-connected ligator body 1 and the elastic ligation suture body 51, into the inner opening 61 of the anal dilator. Then, the endoscope is slowly withdrawn between the anal canal 63 and the handheld part 65. At this time, the push-knot auxiliary line 56 can be seen. The operator holds the endoscope body and the handheld part 65 of the anal dilator 6 with their right hand, and the assistant first fully inserts the push-knot rod inner core 58 into the push-knot rod outer tube 57, and fully exposes the hook at one end of the push-knot rod inner core 58 outside the push-knot end 59. Then, the push-knot rod is inserted through the auxiliary port 64 of the anal dilator 6, hooks the push-knot auxiliary line 56, and pulls it out of the anus through the auxiliary port 64. The push-knot auxiliary line 56 is then removed from the hook of the push-knot rod inner core 58. At this time, the operator holds the hand handle 65 of the anal dilator 6 and the endoscope 7 with both hands, and rotates the anal dilator 6 to rotate the internal hemorrhoids to be ligated into the observation window 62.

[0060] Next, the assistant supports the anal dilator 6 again, and the operator continues to advance the endoscope. Using the suction port 11 of the ligator body 1, the internal hemorrhoids within the observation window 62 are fully suctioned. Once the endoscope screen displays a full red display, the endoscope body is relatively stable due to the negative pressure suction. The operator can then release the endoscope body with their right hand and push the retainer 4 towards the conversion port 25. When the push is blocked, the previous recording position is reached. At this point, the release baffle 12 is fully retracted into the groove 13, and the elastic ligation line body 51 is released. The operator then simultaneously grasps the endoscope body 7 and the handheld part 65 of the anal dilator 6 with their right hand. The assistant again hooks the push-knot rod onto the push-knot auxiliary line 56 outside the auxiliary port 64, gradually pulling the inner core 58 of the push-knot rod outwards. The outer tube 57 of the tie rod is slowly pushed inward through the auxiliary port 64 and the push end 59. When there is resistance, the inner core 58 of the tie rod is pulled outward with appropriate force to tighten the elastic ligation suture body 51. Then, the inner core 58 of the tie rod is released from the push auxiliary line 56, and the outer tube 57 of the tie rod is taken out along the auxiliary port 64. The push auxiliary line 56 is cut with scissors outside the auxiliary port 64, and a single strand is pulled out from the auxiliary port 64. At this time, the internal hemorrhoid ligation is completed. The endoscope injection needle is inserted into the forceps cap at the conversion port 25, and through the conversion device 2 internal channel 23, the forceps port 71 is inserted into the forceps port 74 of the endoscope 7, and extends out from the lens biopsy port of the endoscope 7 to perform sclerotherapy on the ligated mucosal ball of the internal hemorrhoid. The internal hemorrhoid ligation operation is now complete. If it is necessary to perform ligation and sclerotherapy on other internal hemorrhoids, the above operation can be repeated.

[0061] Next, after the internal hemorrhoid ligation is completed, remove the anal dilator 6 and endoscope 7 from the anus. Slightly push the conical cap 46 of the fixator 4 towards the external opening 25. After the fixing wings 42 and the fixing groove 32 are loosened, press the conical cap 46. The conical cap 46 gradually moves down and opens the two movable wings 43. Through the fixing post 44, using the lever principle, the two fixing wings 42 are retracted. At this time, the fixator 4 is in a free state. Move the fixator 4 towards the internal opening 26 to the position closest to the internal opening 26. Release the conical cap 46. At this time, the rebound force of the return spring 48 will pop the conical cap 46 out from the center of the two movable wings 43. At this time, the two fixing wings 42 will be opened by the elastic force of the opening spring 47. After releasing the fixator 4, the two fixing wings 42 will be locked in the fixing groove 32 again, playing a fixing role. Remove the ligator body 1 from the lens 72, and after reversing the pull ring 34 and putting it out of the ligator body 1, the release lead ring 16 and the pull ring 34 can be separated. Then, remove the conversion device 2 from the clamping port 71. At this point, the operation is complete.

[0062] The above description is a further detailed explanation of the technical solution provided in conjunction with the preferred embodiments of this application. It should not be considered that the specific implementation of this invention is limited to the above description. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this application, and all of these should be considered to fall within the protection scope of this application.

Claims

1. An endoscopic hemorrhoid ligation device, characterized in that: Includes the ligator body, conversion device, release and traction device, and elastic ligation suture device; The ligator body is at least partially transparent, has an internal working channel, has a support portion at its front end for carrying the elastic ligation suture device, and has a rear end for connecting to an endoscope. Conversion device: used to connect the forceps port and forceps cap of the endoscope and to provide an operating channel for endoscopic instruments; Release traction device: fixed on the conversion device and operably connected to the support part of the ligator body, used to drive the support part to perform a release action so that the elastic ligation suture device is disengaged from the support part; Elastic ligation suture device: installed on the bearing part, used for ligating internal hemorrhoids after detachment.

2. The endoscopic hemorrhoid ligation device according to claim 1, characterized in that: The supporting part is a movable component that can move relative to the ligator body. The release traction device changes its support state on the elastic ligature device by driving the movable component to move, thereby completing the release.

3. The endoscopic hemorrhoid ligation device according to claim 2, characterized in that: The front end of the ligator body is provided with a groove, and the movable component is a release baffle that is slidably disposed in the groove. An elastic element is provided between the release baffle and the bottom of the groove.

4. The endoscopic hemorrhoid ligation device according to claim 1, characterized in that: The release and pulling device includes an operating part, a locking mechanism, and a traction component; The operating part is movably mounted on the conversion device, and its position can be selectively fixed by the locking mechanism; One end of the traction member is connected to the operating part, and the other end extends and is connected to the support part of the ligator body; The state of the bearing unit is controlled by the traction member by operating the control unit and fixing it with the locking mechanism.

5. An endoscopic hemorrhoid ligation device according to claim 4, characterized in that: The locking mechanism includes a ratchet structure and a locking assembly that cooperate with each other.

6. The endoscopic hemorrhoid ligation device according to claim 5, characterized in that: The locking assembly includes a pair of rotatable clamping arms and a drive member. The movement of the drive member controls the opening and closing of the clamping arms. When the clamping arms are closed, they engage with the ratchet structure to achieve fixation.

7. The endoscopic hemorrhoid ligation device according to claim 1, characterized in that: The elastic ligature device includes a pre-placed elastic ligature coil and a guide connected thereto, the guide being used to guide and assist in tightening the elastic ligature coil after it detaches.

8. An endoscopic hemorrhoid ligation device according to claim 7, characterized in that: The elastic ligature coil uses a knot that can be pulled and tightened.

9. An endoscopic hemorrhoid ligation device according to claim 8, characterized in that: The elastic ligature coil has a retractable end with a connecting part for easy connection with a guide.

10. An endoscopic hemorrhoid ligation device according to claim 7, characterized in that: The guide includes an elongated rod with a functional portion at its distal end for capturing or connecting the elastic ligature coil.

11. An endoscopic hemorrhoid ligation device according to claim 1, characterized in that: It also includes an anal dilator having a channel for the endoscope to pass through and an observation window at its distal end.

12. An endoscopic hemorrhoid ligation device according to claim 11, characterized in that: The anal dilator is provided with a seal at its proximal inlet.

13. An endoscopic hemorrhoid ligation device according to claim 11, characterized in that: The anal dilator has an auxiliary port with a self-sealing function on its tube wall.

14. An endoscopic hemorrhoid ligation device according to claim 11, characterized in that: The anal dilator also includes an inner core, which can be inserted into the channel of the anal dilator, and its distal end is provided with an inflatable fixing part.

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