Endoscope loop ligature device for digestive system department

Abstract

The invention relates to the technical field of gastroenterology, in particular to an endoscope ligation device for the gastroenterology, which comprises an endoscope handle part and an insertion part connected to the head part of the endoscope handle part, a ligation head part is mounted at the head part of the insertion part, a negative pressure adsorption mechanism is arranged on the inner side of the ligation head part, and the negative pressure adsorption mechanism is connected with the endoscope handle part. A plurality of elastic rings are connected to the loop ligature head in a sleeving mode, a trigger push rod switch is arranged on the negative pressure adsorption mechanism and connected with a retracting and releasing mechanism located on the inner side of the loop ligature head, and the retracting and releasing mechanism is connected with the negative pressure adsorption mechanism. The problems that an elastic ring loading process is time-consuming and labor-consuming, complex lesions such as esophageal varicose veins need to be subjected to loop ligature for many times, the treatment opportunity of a patient is easily affected, the head may cause mechanical injury to the esophagus when the device enters the esophagus, and comfort and safety are low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gastroenterology, and in particular to an endoscopic ligation device used in gastroenterology. Background Art

[0002] In gastroenterology, ligation therapy is often required for certain pathological tissues, such as esophageal varices, gastric varices, and polyps. If not promptly addressed, these pathological tissues can lead to severe bleeding or other life-threatening complications. Traditional treatments, such as medication and surgery, often suffer from unstable efficacy, significant trauma, and slow recovery. Therefore, there is an urgent clinical need for a safe, effective, and simple ligation device to meet these treatment needs.

[0003] Chinese patent publication number CN222398554U discloses an endoscopic ligation device, belonging to the field of medical device technology. The device comprises a rotating handle, a handle base, and a release cord. A spring pressure plate is provided on one side of the handle base, and a support column is provided on the side of the handle base. One end of the spring pressure plate is mounted on the support column; the other end of the spring pressure plate extends inside the rotating handle. A pull cord is provided on the handle base, and one end of the pull cord is connected to the release cord. The invention secures the ligation device's ferrule to a sleeve, compresses the release cord between the ferrule and the sleeve, and provides release beads at regular intervals. The release cord is connected to the handle, and a guide tube is provided between the sleeve and the handle. The handle is rotated to wrap the pull cord around a pull cord winding ring, causing the ferrule to fall off the sleeve. A spring pressure plate is provided on the handle to provide a release prompt each time the ferrule is released.

[0004] Endoscopic ligation devices such as the above-mentioned ones are mostly controlled by a winding stretching trigger mode, and have a relatively complex structure, which easily leads to complex loading of the elastic ring. For complex lesions such as esophageal varices, multiple ligations and repeated treatments may be required to achieve the ideal effect, which will not only delay the patient's best treatment time, but also increase the number of treatments and pain for the patient. In addition, the head structure of the endoscopic ligation device is relatively hard, which can easily cause damage to the patient's esophagus during the process of entering the patient's esophagus, resulting in lower comfort and safety. Summary of the Invention

[0005] The purpose of the present invention is to provide an endoscopic ligation device for gastroenterology, which overcomes the problems in the prior art that most endoscopic ligation devices adopt a winding stretching trigger mode control, have a relatively complex structure, and the process of loading the elastic ring is time-consuming and labor-intensive. For complex lesions such as esophageal varices, multiple ligation treatments are required, which can easily affect the patient's optimal treatment time. In addition, the head of the device may cause mechanical damage to the esophagus during the process of entering the esophagus, resulting in low comfort and safety in use.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is: An endoscopic ligation device for gastroenterology has been designed. A ligation head is provided at the end of the endoscope handle to ligate the bleeding site of varicose veins. An elastic ring can be directly placed on the ligation head, and then the elastic rings placed on the ligation head are controlled by the control unit to be released one by one by triggering a push rod switch, so that the elastic rings can be placed on the tissue adsorbed by the negative pressure adsorption mechanism. This is more convenient and saves time and effort. At the same time, an elastic bag ring is provided at the ligation head to prevent discomfort or damage to the device during entry into the esophagus, thereby improving the comfort and safety of the device during use. The specific plan is as follows: An endoscopic ligation device for gastroenterology comprises an endoscope handle and an insertion portion connected to the head of the endoscope handle for insertion into a patient's digestive tract, wherein a ligation head is mounted on the head of the insertion portion; A negative pressure adsorption mechanism for adsorbing varicose vein bleeding tissue is provided on the inner side of the ligation head, and the negative pressure adsorption mechanism is connected to the endoscope handle. A plurality of elastic rings are sequentially sleeved on the ligation head from front to back, and are used to ligature the tissue adsorbed by the negative pressure adsorption mechanism. The negative pressure adsorption mechanism is provided with a trigger push rod switch for releasing the elastic ring. The trigger push rod switch is connected to a retractable mechanism located inside the ligature head. The retractable mechanism is connected to the negative pressure adsorption mechanism.

[0007] Preferably, a negative pressure ventilation tube is provided in the insertion portion, the negative pressure ventilation tube is provided along the forceps pipe inside the insertion portion, and the negative pressure ventilation tube is connected to the negative pressure adsorption mechanism through a negative pressure tube; The negative pressure tube is connected to the ligation head through a shunt tube, and the ventilation state of the negative pressure ventilation tube is controlled by a control button on the endoscope handle.

[0008] Preferably, the ligation head comprises a mounting shell, a stepped sleeve, a push groove, an elastic bag ring, a conical sleeve opening, a supplementary spring and a supplementary push ring, and the mounting shell is sleeved on the outside of the tail of the stepped sleeve; An annular extrusion box is sleeved at the tail end of the stepped sleeve, and the extrusion box is connected to the negative pressure pipe through the shunt pipe. An annular expansion sleeve is provided in the middle of the stepped sleeve, and a butt joint pipe is connected between the annular expansion sleeve and the annular extrusion box; The elastic ring is sleeved on the annular expansion sleeve, the supplementary spring and the supplementary push ring are both sleeved on the stepped sleeve, the tail of the supplementary spring abuts on the annular extrusion box, the supplementary push ring abuts on the head of the supplementary spring, and the supplementary push ring abuts on the elastic ring on the rear side; The elastic bag ring is sleeved on the outside of the stepped sleeve head, the conical sleeve opening is arranged on the stepped sleeve head, the push groove is arranged between the annular expansion sleeve and the elastic bag ring, the trigger push rod switch is movably connected in the push groove, and the negative pressure adsorption mechanism and the retracting mechanism are arranged in the stepped sleeve.

[0009] Preferably, the annular extrusion box, the annular expansion and contraction sleeve and the elastic bag ring are respectively filled with composite hydrogel.

[0010] Preferably, the negative pressure adsorption mechanism includes a negative pressure adsorption cover, a negative pressure connecting pipe, a piston plate and a negative pressure cabin, and the negative pressure cabin is connected to the upper side of the stepped sleeve through a fixing plate and is connected to the negative pressure pipe; The piston plate is slidably connected in the negative pressure cabin, the piston plate is connected to the retractable mechanism via a piston rod, and one end of the negative pressure connecting pipe is connected to the bottom of the negative pressure cabin; The other end of the negative pressure connecting tube is connected to the top of the negative pressure adsorption cover. The negative pressure adsorption cover is a transparent structure and is located inside the head of the stepped sleeve. The trigger push rod switch is arranged outside the negative pressure adsorption cover.

[0011] Preferably, the retractable mechanism comprises a movable plate, a first connecting rod, a second connecting rod, a pulling rope and a telescopic rod, and the movable plate is connected to the piston plate via a piston rod; The negative pressure connecting pipe passes through the movable plate, and the number of the first connecting rod and the number of the second connecting rod are both two. The two first connecting rods and the two second connecting rods are respectively connected to the outside of the movable plate and extend to the outside of the negative pressure adsorption cover; One end of the pulling rope is connected to the outer end of the first connecting rod, and the other end of the pulling rope is connected to the trigger push rod switch. One end of the telescopic rod is connected to the outer end of the second connecting rod, and the other end of the telescopic rod is connected to the stepped sleeve head.

[0012] Preferably, the trigger push rod switch includes a rectangular flip frame, a reversing wheel and a reset spring, the reversing wheel is rotatably connected to the outside of the opening of the negative pressure adsorption cover, and the lower side of the rectangular flip frame is rotatably connected to the reversing wheel; The return spring is connected between the upper end portion of the inner side of the rectangular flip frame and the negative pressure adsorption cover, and the other end of the pulling rope passes around the reversing wheel and is connected to the middle portion of the outer side of the rectangular flip frame.

[0013] Preferably, an electrode contact is provided in the middle of the telescopic rod, a first power contact is provided on the inner side of the stepped sleeve head, and a second power contact is provided in the middle of the inner side of the stepped sleeve, and the first power contact and the second power contact are used to connect with the electrode contact.

[0014] Preferably, the negative pressure pipe and the shunt pipe are respectively provided with a first control valve and a second control valve.

[0015] The beneficial effects of the present invention are: 1. The elastic ring in the present invention can be directly put on the ligation head, reducing the complexity of its loading. The control unit controls the flow of the composite hydrogel between the annular extrusion box and the annular expansion and contraction sleeve, and then cooperates with the retraction and extension mechanism to drive the trigger push rod switch to expand or release. By switching on and off the composite hydrogel in the annular expansion and contraction sleeve and the elastic capsule ring, the elastic rings on the annular expansion and contraction sleeve are released one by one, thereby accurately ligating the bleeding location tissue adsorbed by the negative pressure adsorption mechanism, thereby improving the convenience of elastic ring ligation.

[0016] 2. The elastic bag ring connected to the ligation head of the present invention can prevent damage to the esophagus when the ligation head enters the patient's esophagus, and the composite hydrogel in the elastic bag ring expands after power is applied to limit the elastic ring. After power is cut off and the elastic ring contracts, it can easily slide out. Combined with the conical sleeve opening set on the stepped sleeve head, the elastic ring can be smoothly and accurately ligated on the tissue adsorbed by the negative pressure adsorption mechanism, ensuring its ligation effect.

[0017] 3. In the present invention, the elastic rings are sequentially and closely mounted on the annular expansion and contraction sleeve from front to back. After the head elastic ring is released, the rear elastic ring will be promptly replenished under the push of the replenishment spring to facilitate the next ligation. The release and replenishment of the elastic rings are combined with the adsorption and release of the negative pressure adsorption mechanism, which not only improves the convenience of the device ligation, but also improves the linkage of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an endoscopic ligation device for gastroenterology according to the present invention; Figure 2 This is a schematic structural diagram of an insertion portion of an endoscopic ligation device for use in gastroenterology according to the present invention; Figure 3 for Figure 2 A partial enlarged schematic diagram; Figure 4 This is a schematic diagram of the installation of an elastic ring in an endoscopic ligation device for gastroenterology according to the present invention; Figure 5 This is a side view of the installation of an elastic ring in an endoscopic ligation device for gastroenterology according to the present invention; Figure 6 for Figure 5 Schematic diagram of the cross section at the middle BB; Figure 7 This is a schematic structural diagram of a ligation head in an endoscopic ligation device for gastroenterology according to the present invention; Figure 8 This is a side view of the ligation head of an endoscopic ligation device for gastroenterology of the present invention; Figure 9 for Figure 8 Schematic diagram of the cross section at CC; Figure 10 for Figure 9 A partial enlarged schematic diagram of point D in the middle; Figure 11 This is a schematic diagram of the connection relationship between a supplementary spring and a supplementary push ring in an endoscopic ligation device for gastroenterology of the present invention; Figure 12 This is a schematic structural diagram of a negative pressure adsorption mechanism in an endoscopic ligation device for gastroenterology according to the present invention; Figure 13 for Figure 12 A partial enlarged schematic diagram of point E in the middle; Figure 14 This is a structural schematic diagram of a retractable mechanism in an endoscopic ligation device for gastroenterology according to the present invention; Figure 15 The present invention is a schematic structural diagram of a telescopic rod in an endoscopic ligation device for gastroenterology.

[0019] In the figure: 1 - endoscope handle; 2 - control unit; 21 - annular groove; 22 - slide groove; 23 - push-pull handle; 24 - connecting rod; 25 - annular piston; 3 - ligation head; 31 - mounting housing; 32 - stepped sleeve; 321 - annular extrusion box; 322 - docking tube; 323 - annular expansion and contraction sleeve; 324 - second power contact; 33 - push groove; 34 - elastic capsule ring; 341 - first power contact; 35 - tapered sleeve; 36 - supplementary spring; 37 - supplementary push ring; 4-negative pressure tube; 41-first control valve; 5-shunt tube; 51-second control valve; 6-elastic ring; 7-trigger push rod switch; 71-rectangular flip frame; 72-reversing wheel; 73-reset spring; 8-retraction mechanism; 81-movable plate; 82-piston rod; 83-first connecting rod; 84-second connecting rod; 85-pulling rope; 86-telescopic rod; 861-electrode contact; 9-negative pressure adsorption cover; 91-negative pressure connecting tube; 92-piston plate; 93-negative pressure cabin. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that these specific details are not necessarily required to practice the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not described in detail to avoid obscuring the present invention.

[0022] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment," "an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combinations and / or subcombinations. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. 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. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0024] like Figure 1-15 As shown, the present invention provides an endoscopic ligation device for use in gastroenterology, comprising an endoscope handle 1 and an insertion portion 2 connected to the head of the endoscope handle 1 for insertion into a patient's digestive tract. A ligation head 3 is mounted on the head of the insertion portion 2. A negative pressure adsorption mechanism is provided on the inner side of the ligation head 3 for adsorbing tissue at the bleeding site of varicose veins. The negative pressure adsorption mechanism can accurately adsorb the varicose vein tissue to be ligated, facilitating subsequent ligation. The ligation head 3 is sequentially sleeved with a plurality of elastic rings 6 for ligating the tissue adsorbed by the negative pressure adsorption mechanism from front to back. The negative pressure adsorption mechanism is provided with a trigger push rod switch 7 for releasing the elastic rings 6. When the trigger push rod switch 7 is deployed and released, the elastic rings 6 are smoothly ligated at the bleeding site of the varicose veins to achieve a hemostatic effect. The trigger push rod switch 7 is connected to a retractable mechanism 8 located on the inner side of the ligation head 3. The retractable mechanism 8 is connected to the negative pressure adsorption mechanism. The retractable mechanism 8 drives the trigger push rod switch 7 to release the elastic rings 6 on the ligation head 3 one by one for ligation.

[0025] In the above scheme, a negative pressure ventilation tube 21 is provided in the insertion part 2. The negative pressure ventilation tube 21 is provided along the forceps pipe inside the insertion part 2 and does not affect the operation in the forceps pipe. The negative pressure ventilation tube 21 is connected to the negative pressure adsorption mechanism through the negative pressure tube 4. The negative pressure tube 4 is connected to the ligation head 3 through the shunt tube 5. The ventilation state of the negative pressure ventilation tube 21 is controlled by the control button on the endoscope handle 1. A button that can control the ventilation state in the negative pressure ventilation tube 21 is provided on the endoscope handle 1 (it can also be connected to the original negative pressure structure of the endoscope handle). Different ventilation states can be selected according to needs to enable the negative pressure adsorption mechanism to achieve negative pressure adsorption.

[0026] In the above scheme, the ligation head 3 includes a mounting shell 31, a stepped sleeve 32, a push groove 33, an elastic bag ring 34, a conical sleeve 35, a supplementary spring 36 and a supplementary push ring 37. The mounting shell 31 is sleeved on the outside of the tail of the stepped sleeve 32. The tail of the stepped sleeve 32 is sleeved with an annular extrusion box 321. The annular extrusion box 321 is connected to the negative pressure tube 4 through the shunt tube 5. An annular expansion sleeve 323 is provided in the middle of the stepped sleeve 32. A docking tube 322 is connected between the annular expansion sleeve 323 and the annular extrusion box 321. The elastic ring 6 is sleeved on the annular expansion sleeve 323. The supplementary spring 36 and the supplementary push ring 37 are both sleeved on the stepped sleeve 32, the tail of the supplementary spring 36 abuts on the annular extrusion box 321, the supplementary push ring 37 abuts on the head of the supplementary spring 36, the supplementary push ring 37 abuts on the rear elastic ring 6, the elastic bag ring 34 is sleeved on the outside of the head of the stepped sleeve 32, the conical sleeve 35 is set at the head of the stepped sleeve 32, the push groove 33 is set between the annular expansion sleeve 323 and the elastic bag ring 34, the trigger push rod switch 7 is movably connected in the push groove 33, and the negative pressure adsorption mechanism and the retracting mechanism 8 are set in the stepped sleeve 32.

[0027] As an optimized technical solution of the present invention, the stepped sleeve 32 adopts a stepped structure with a large head and a small tail. The annular extrusion box 321 is arranged at the tail of the stepped sleeve 32. The composite hydrogel is filled in the annular extrusion box 321 through a bag. The annular expansion sleeve 323 is arranged at the head of the stepped sleeve 32. The bag in the annular extrusion box 321 and the annular expansion sleeve 323 are connected by a butt pipe 322, so that a negative pressure is generated in the annular extrusion box 321 through the shunt pipe 5. The negative pressure can squeeze the sac bag, so that the composite hydrogel in the sac bag is squeezed into the annular expansion sleeve 323, so that the elastic ring 6 on the annular expansion sleeve 323 is tightened, so that the supplementary spring 36 cannot push the rear elastic ring 6 to the front side of the annular expansion sleeve 323 through the supplementary pushing ring 37, so that the elastic ring 6 in the pushing groove 33 can be squeezed out from the head of the stepped sleeve 32 by triggering the pushing rod switch 7 and tied onto the varicose vein tissue adsorbed by the negative pressure adsorption mechanism to achieve the purpose of hemostasis.

[0028] After the elastic ring 6 in the pushing groove 33 is pushed out, the control part 2 can be used to restore the normal air pressure in the annular extrusion box 321 through the connecting tube 41, so that the annular expansion and contraction sleeve 323 is squeezed and retracted. Then, under the elastic force of the supplementary spring 36, the supplementary pushing ring 37 can be used to push the elastic ring 6 on the annular expansion and contraction sleeve 323 toward the head, so that the elastic ring 6 on the front side of the annular expansion and contraction sleeve 323 is pushed into the pushing groove 33, so as to facilitate the next ligation.

[0029] The conical sleeve opening 35 provided at the head of the stepped sleeve 32 adopts a hollow structure design with a larger tail and a smaller head, so that when the elastic ring 6 is pushed out from the head of the stepped sleeve 32, it can be more smoothly ligated on the varicose vein tissue. The elastic bag ring 34 has the ability to shrink, which can not only ensure the comfort of the ligation head 3 during the process of entering the esophagus, but also play a limiting role in the process of releasing the elastic ring 6, ensuring that the elastic ring 6 is released one by one.

[0030] In the above solution, the annular extrusion box 321, the annular expansion and contraction sleeve 323 and the elastic bag ring 34 are respectively filled with composite hydrogel.

[0031] As an optimized technical solution of the present invention, the composite hydrogel can expand when powered on and shrink when powered off, thereby effectively controlling the pushing and ligating work of the elastic ring 6.

[0032] In the above scheme, the negative pressure adsorption mechanism includes a negative pressure adsorption cover 9, a negative pressure connecting pipe 91, a piston plate 92 and a negative pressure cabin 93. The negative pressure cabin 93 is connected to the upper side of the inside of the stepped sleeve 32 through a fixed plate, and is connected to the negative pressure pipe 4. The piston plate 92 is slidably connected in the negative pressure cabin 93. The piston plate 92 is connected to the retracting mechanism 8 through the piston rod 82. One end of the negative pressure connecting pipe 91 is connected to the head of the negative pressure cabin 93, and the other end of the negative pressure connecting pipe 91 is connected to the top of the negative pressure adsorption cover 9. The negative pressure adsorption cover 9 is a transparent structure and is located on the inner side of the head of the stepped sleeve 32. The trigger push rod switch 7 is set on the outside of the negative pressure adsorption cover 9.

[0033] As an optimized technical solution of the present invention, under the action of the negative pressure ventilation tube 21 connected to the negative pressure tube 4, negative pressure will be generated in the negative pressure chamber 93, and then the piston plate 92 can be moved toward the tail in the negative pressure chamber 93, and the retracting mechanism 8 can be driven to move toward the tail in the stepped sleeve 32 through the piston rod 82. In the process of the piston plate 92 moving toward the tail of the negative pressure chamber 93, negative pressure will be generated at the head of the negative pressure chamber 93 through the piston plate 92. The negative pressure will generate negative pressure in the negative pressure adsorption cover 9 through the negative pressure tube 94, and the negative pressure adsorption cover 9 will use the negative pressure to adsorb the tissue at the location of varicose vein bleeding to be ligated.

[0034] In the above scheme, the retracting and releasing mechanism 8 includes a movable plate 81, a first connecting rod 83, a second connecting rod 84, a pulling rope 85 and a telescopic rod 86. The movable plate 81 is connected to the piston plate 92 through the piston rod 82. The negative pressure connecting pipe 91 passes through the movable plate 81. There are two first connecting rods 83 and two second connecting rods 84. The two first connecting rods 83 and the two second connecting rods 84 are respectively connected to the outside of the movable plate 81 and extend to the outside of the negative pressure adsorption cover 9. One end of the pulling rope 85 is connected to the outer end of the first connecting rod 83, and the other end of the pulling rope 85 is connected to the trigger push rod switch 7. One end of the telescopic rod 86 is connected to the outer end of the second connecting rod 84, and the other end of the telescopic rod 86 is connected to the head of the stepped sleeve 32.

[0035] As an optimized technical solution of the present invention, when the piston plate 92 moves in the negative pressure chamber 93, the piston rod 82 drives the movable plate 81 to move, and then the first connecting rod 83 drives the trigger push rod switch 7 through the pulling rope 85 to realize the pushing effect on the elastic ring 6. At the same time, the second connecting rod 84 drives the telescopic rod 86 to be extended and retracted, so that the composite hydrogel at different positions can be turned on and off by the telescopic rod 86, so that it can cooperate with other components to release the elastic rings 6 one by one.

[0036] In the above scheme, the trigger push rod switch 7 includes a rectangular flip frame 71, a reversing wheel 72 and a reset spring 73. The reversing wheel 72 is rotatably connected to the outside of the opening of the negative pressure adsorption cover 9. The lower side of the rectangular flip frame 71 is rotatably connected to the reversing wheel 72. The reset spring 73 is connected between the upper end of the inner side of the rectangular flip frame 71 and the negative pressure adsorption cover 9. The other end of the pulling rope 85 passes around the reversing wheel 72 and is connected to the middle part of the outer side of the rectangular flip frame 71.

[0037] As an optimized technical solution of the present invention, the rectangular flip frame 71 is located in the elastic ring 6. When the elastic ring 6 needs to be released, the pulling rope 85 can be pulled, and the pulling rope 85 can drive the rectangular flip frame 71 to flip outward, pushing the elastic ring 6 in the push groove 33 out. When the elastic ring 6 needs to be replenished in the push groove 33, the pulling rope 85 will be loosened, and the reset spring 73 can be used to retract it, so that the rectangular flip frame 71 retracts into the movable groove at the lower end of the stepped sleeve 32 to avoid interfering with the elastic ring 6 being pushed into the push groove 33 normally.

[0038] In the above scheme, an electrode contact 861 is provided in the middle of the telescopic rod 86, a first power contact 341 is provided on the inner side of the head of the stepped sleeve 32, and a second power contact 324 is provided in the middle of the inner side of the stepped sleeve 32. The first power contact 341 and the second power contact 324 are used to connect with the electrode contact 861.

[0039] As an optimized technical solution of the present invention, two telescopic rods 86 are provided, and the two telescopic rods 86 are located on both sides of the negative pressure adsorption cover 9, and the electrode contacts 861 provided on the two telescopic rods 86 are respectively divided into positive and negative poles, and then, during the extension and retraction process of the two telescopic rods 86, the two electrode contacts 861 can be driven to connect with the first energized contacts 341 and the second energized contacts 324 on both sides respectively, so that the composite hydrogel in the elastic bag ring 34 and the annular expansion and contraction sleeve 323 changes when the power is on and off, and the release work of the elastic ring 6 is performed.

[0040] In the above solution, the negative pressure pipe 4 and the shunt pipe 5 are respectively provided with a first control valve 41 and a second control valve 51 , and different operations can be completed by controlling the opening and closing states of the control valves.

[0041] Specific implementation cases: When the endoscopic ligation device is used, an elastic ring 6 is put on the pushing groove 33, and multiple elastic rings 6 are closely put on the annular expansion and contraction sleeve 323, so that the supplementary pushing ring 37 rests on the rear elastic ring 6, and the push-pull handle 23 is pulled backward along the slide groove 22. Driven by the connecting rod 24, the annular piston 25 is moved backward along the annular groove 21, and then negative pressure can be generated in the annular extrusion box 321 through the connecting tube 41. Under the action of the negative pressure, the bag in the annular extrusion box 321 is squeezed, so that the composite hydrogel in the bag is squeezed into the annular expansion and contraction sleeve 323 through the docking tube 322 to support it, so that the elastic ring 6 is supported on the annular expansion and contraction sleeve 323, preventing the elastic ring 6 on the annular expansion and contraction sleeve 323 from being pushed by the supplementary pushing ring 37.

[0042] Next, the ligation head 3 is inserted along the patient's esophagus through the insertion part 2. When the ligation head 3 is inserted to the position requiring treatment, the varicose vein bleeding position tissue is accurately collected into the conical sleeve 35 of the head of the stepped sleeve 32 through the endoscope, and the varicose vein tissue is placed in the negative pressure adsorption cover 9, the negative pressure is started, the first control valve 41 is opened, and the air in the negative pressure chamber 93 is extracted through the negative pressure pipe 4 by the negative pressure ventilation tube 21, so that the piston plate 92 moves backward along the negative pressure chamber 93, and negative pressure will be generated on the front side of the piston plate 92, and then negative pressure can be generated in the negative pressure adsorption cover 9 through the negative pressure connecting pipe 91. The varicose vein tissue in the negative pressure adsorption cover 9 can be adsorbed by the negative pressure, so that the root of the adsorbed varicose vein tissue is exposed to the outside.

[0043] Then the piston rod 82 can be used to drive the movable plate 81 to move backward, and the movable plate 81 can be moved backward through the first connecting rod 83 and the second connecting rod 84. The first connecting rod 83 will drive the rectangular flip frame 71 inside the elastic ring 6 on the pushing groove 33 to flip outward and stretch it through the pulling rope 85. The elastic ring 6 in the pushing groove 33 can be pushed out through the stretched rectangular flip frame 71, so that the elastic ring 6 can fall smoothly along the conical sleeve 35 to the root of the varicose vein tissue adsorbed by the negative pressure adsorption cover 9, and the elastic ring 6 can be used to accurately and stably ligate the varicose vein bleeding position tissue to block the blood flow and achieve the purpose of hemostasis.

[0044] At the same time, the second connecting rod 84 will drive the telescopic rod 86 to move backward, so that the electrode contact 861 is connected with the second power contact 324 on the annular expansion sleeve 323, thereby causing the composite hydrogel in the annular expansion sleeve 323 to expand and tighten the elastic ring 6 on the outside thereof to prevent the excess elastic ring 6 from being pushed out by the supplementary spring 36.

[0045] When it is necessary to tie the next elastic ring 6, the push-pull handle 24 can be pushed forward, and the annular piston 25 can be moved to the front side of the annular groove 21 to open the second control valve 51. The air pressure in the annular extrusion box 321 can be restored by using the negative pressure ventilation pipe 21 through the shunt pipe 5, and under the elastic extrusion of the elastic ring 6, the annular expansion sleeve 323 is compressed to fit with the stepped sleeve 32, so that the composite hydrogel in the annular expansion sleeve 323 is squeezed into the bag in the annular extrusion box 321 through the docking pipe 322. At the same time, air is blown into the negative pressure chamber 93 through the negative pressure pipe 4, so that the piston plate 92 moves forward in the negative pressure chamber 93. The movable plate 81 is moved forward by the piston rod 82, and the pulling effect of the pulling rope 85 is released by the first connecting rod 83. Under the elastic force of the reset spring 73, the rectangular flip frame 71 is retracted into the movable groove on the front side of the stepped sleeve 32, and the electrode contact 861 on the telescopic rod 86 is moved forward to connect with the first power contact 341, so that the composite hydrogel in the elastic bag ring 34 is energized and expanded. After that, the rear elastic ring 6 can be pushed forward into the pushing groove 33 under the push of the supplementary spring 36, and the preparation work before ligation is completed. The ligation work is completed according to the above-mentioned ligation control steps.

[0046] Finally, the states of the annular extrusion box 321, the annular expansion and contraction sleeve 323 and the elastic bag ring 34 are controlled by the negative pressure ventilation tube 21 and the negative pressure adsorption mechanism, and the elastic ring 6 on the annular expansion and contraction sleeve 323 is released one by one to complete the ligation work, so as to improve the convenience and accuracy of the endoscopic ligation device, and at the same time improve the comfort and use effect of the endoscopic ligation device during use.

[0047] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An endoscopic ligation device for use in gastroenterology, comprising an endoscope handle (1), and an insertion portion (2) connected to the head of the endoscope handle (1) for insertion into a patient's digestive tract, characterized in that: The head of the insertion portion (2) is provided with a ligature head (3); A negative pressure adsorption mechanism for adsorbing varicose vein bleeding tissue is provided on the inner side of the ligation head (3), and the negative pressure adsorption mechanism is connected to the endoscope handle (1). A plurality of elastic rings (6) are sequentially sleeved on the ligation head (3) from front to back, and are used for ligating the tissue adsorbed by the negative pressure adsorption mechanism. The negative pressure adsorption mechanism is provided with a trigger push rod switch (7) for releasing the elastic ring (6); the trigger push rod switch (7) is connected to a retractable mechanism (8) located inside the ligature head (3); and the retractable mechanism (8) is connected to the negative pressure adsorption mechanism.

2. The endoscopic ligation device for gastroenterology according to claim 1, characterized in that: A negative pressure ventilation tube (21) is provided in the insertion portion (2), and the negative pressure ventilation tube (21) is provided along the forceps pipe inside the insertion portion (2). The negative pressure ventilation tube (21) is connected to the negative pressure adsorption mechanism through a negative pressure tube (4); The negative pressure tube (4) is connected to the ligation head (3) via a shunt tube (5), and the ventilation state of the negative pressure ventilation tube (21) is controlled by a control button on the endoscope handle (1).

3. The endoscopic ligation device for gastroenterology according to claim 2, characterized in that: The ligation head (3) comprises a mounting shell (31), a stepped sleeve (32), a push groove (33), an elastic bag ring (34), a conical sleeve (35), a supplementary spring (36) and a supplementary push ring (37), and the mounting shell (31) is sleeved on the outside of the tail of the stepped sleeve (32); The tail of the stepped sleeve (32) is sleeved with an annular extrusion box (321), the extrusion box (321) is connected to the negative pressure pipe (4) via the shunt pipe (5), an annular expansion sleeve (323) is provided in the middle of the stepped sleeve (32), and a butt joint pipe (322) is connected between the annular expansion sleeve (323) and the annular extrusion box (321); The elastic ring (6) is sleeved on the annular expansion sleeve (323), the supplementary spring (36) and the supplementary push ring (37) are both sleeved on the stepped sleeve (32), the tail of the supplementary spring (36) abuts on the annular extrusion box (321), the supplementary push ring (37) abuts on the head of the supplementary spring (36), and the supplementary push ring (37) abuts on the rear side of the elastic ring (6); The elastic bag ring (34) is sleeved on the outside of the head of the stepped sleeve (32), the conical sleeve opening (35) is arranged at the head of the stepped sleeve (32), the pushing groove (33) is arranged between the annular expansion sleeve (323) and the elastic bag ring (34), the trigger push rod switch (7) is movably connected in the pushing groove (33), and the negative pressure adsorption mechanism and the retracting mechanism (8) are arranged in the stepped sleeve (32).

4. The endoscopic ligation device for gastroenterology according to claim 3, characterized in that: Composite hydrogels are respectively contained in the annular extrusion box (321), the annular expansion and contraction sleeve (323), and the elastic bag ring (34).

5. The endoscopic ligation device for gastroenterology according to claim 3, characterized in that: The negative pressure adsorption mechanism comprises a negative pressure adsorption cover (9), a negative pressure connecting pipe (91), a piston plate (92) and a negative pressure chamber (93); the negative pressure chamber (93) is connected to the upper side of the stepped sleeve (32) via a fixing plate and is connected to the negative pressure pipe (4); The piston plate (92) is slidably connected in the negative pressure cabin (93), the piston plate (92) is connected to the retractable mechanism (8) via a piston rod (82), and one end of the negative pressure connecting pipe (91) is connected to the bottom of the negative pressure cabin (93); The other end of the negative pressure connecting tube (91) is connected to the top of the negative pressure adsorption cover (9). The negative pressure adsorption cover (9) is a transparent structure and is located inside the head of the stepped sleeve (32). The trigger push rod switch (7) is arranged outside the negative pressure adsorption cover (9).

6. The endoscopic ligation device for gastroenterology according to claim 5, characterized in that: The retractable mechanism (8) comprises a movable plate (81), a first connecting rod (83), a second connecting rod (84), a pulling rope (85) and a telescopic rod (86); the movable plate (81) is connected to the piston plate (92) via a piston rod (82); The negative pressure connecting pipe (91) passes through the movable plate (81), and the number of the first connecting rod (83) and the number of the second connecting rod (84) are both two. The two first connecting rods (83) and the two second connecting rods (84) are respectively connected to the outside of the movable plate (81) and extend to the outside of the negative pressure adsorption cover (9); One end of the pulling rope (85) is connected to the outer end of the first connecting rod (83), and the other end of the pulling rope (85) is connected to the trigger push rod switch (7). One end of the telescopic rod (86) is connected to the outer end of the second connecting rod (84), and the other end of the telescopic rod (86) is connected to the head of the stepped sleeve (32).

7. The endoscopic ligation device for gastroenterology according to claim 6, characterized in that: The trigger push rod switch (7) comprises a rectangular flip frame (71), a reversing wheel (72) and a return spring (73); the reversing wheel (72) is rotatably connected to the outside of the opening of the negative pressure adsorption cover (9); and the lower side of the rectangular flip frame (71) is rotatably connected to the reversing wheel (72); The return spring (73) is connected between the upper end of the inner side of the rectangular flip frame (71) and the negative pressure adsorption cover (9), and the other end of the pulling rope (85) passes around the reversing wheel (72) and is connected to the middle part of the outer side of the rectangular flip frame (71).

8. The endoscopic ligation device for gastroenterology according to claim 6, characterized in that: An electrode contact (861) is provided in the middle of the telescopic rod (86), a first power contact (341) is provided on the inner side of the head of the stepped sleeve (32), and a second power contact (324) is provided in the middle of the inner side of the stepped sleeve (32), and the first power contact (341) and the second power contact (324) are used to be connected to the electrode contact (861).

9. The endoscopic ligation device for gastroenterology according to claim 2, characterized in that: The negative pressure pipe (4) and the shunt pipe (5) are respectively provided with a first control valve (41) and a second control valve (51).

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