A multi-shot anorectal ligation device

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to a multi-shot anorectal ligation device, comprising a shell, a negative pressure device, a wire take-up mechanism, and a wire switching mechanism provided inside the shell, the shell being connected to a wire breaking mechanism, the front end of the wire breaking mechanism being connected to a ligation head, the outer surface of the ligation head being used to set an elastic wire knot, a ligation cavity for accommodating lesion tissue being provided inside the ligation head, the ligation cavity being connected to a negative pressure device, the negative pressure device being used to form a negative pressure in the ligation cavity, the ligation head being provided with two or more threading holes for elastic wires to pass through, one end of the threading hole being open on the front end surface of the ligation head. The ligation head of the present invention can be provided with two or more elastic wires, and after completing the ligation of a lesion tissue, multiple elastic wires can be continuously replaced without replacing the ligation device, and ligation operations can be performed on multiple lesions tissues, thereby reducing the consumption of medical devices and saving medical costs.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a multi-shot anorectal ligation device. Background Art

[0002] Anorectal ligation devices are important medical devices used to treat conditions such as hemorrhoids. Their primary working principle is to create a tight, circular band around the affected tissue using the ligature tip, blocking blood flow to the affected tissue, causing necrosis and eventual sloughing. The advantages of using this device for surgery include ease of use and a low risk of complications.

[0003] Various solutions for anorectal ligation devices have been disclosed in the prior art. For example, the invention patent with authorization publication number CN112971927B discloses an elastic line automatic control ligation device, which includes a main body, a suction tube, an elastic line, a ring sleeve and a tightening device; the suction tube is arranged on the main body, one end of the elastic line is arranged as a ring sleeve, the ring sleeve is arranged at the front end of the suction tube, and the other end of the elastic line is arranged on the tightening device, which is arranged on the main body. The tightening device is used to wind the elastic line and tighten the ring sleeve. The ring sleeve is provided with a slipknot, which rests against the fulcrum and is tightened toward the center of the ring sleeve under the pulling action of the elastic line, so as to be suitable for controlling the ligation effect of the ring sleeve on hemorrhoids.

[0004] The invention provides an elastic wire automatic control ligation device. By setting a tightening device on the ligation device body, the motor drives the winding shaft to tighten the elastic wire loop. At the same time, the tightening device obtains the tension of the elastic wire through a pressure sensor until it reaches a preset tension threshold. By controlling the tension, the degree of ligation of the loop on the hemorrhoids is determined to prevent the loop from loosening and falling off. The device has a simple structure and is easy to operate. However, the hemorrhoid ligation device is a disposable product with only one elastic wire. After ligating a lesion tissue, it cannot be used again. Moreover, if the patient has multiple lesions that need to be ligated, multiple ligation devices need to be replaced, which is cumbersome to operate and consumes a lot of medical equipment. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-shot anorectal ligation device to solve the problems raised in the above background technology.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention is:

[0007] A multi-shot anorectal ligation device comprises a housing, a negative pressure device, a wire take-up mechanism, and a wire switching mechanism disposed within the housing, the housing being connected to a wire breaking mechanism, the front end of the wire breaking mechanism being connected to a ligation head, the outer surface of the ligation head being used to sheath an elastic wire knot, the ligation head being provided with a ligation cavity for accommodating lesion tissue, the ligation cavity being connected to the negative pressure device, the negative pressure device being used to create negative pressure in the ligation cavity, the ligation head being provided with two or more threading holes for the elastic wire to pass through, one end of each threading hole being open to the front end surface of the ligation head;

[0008] The wire-taking mechanism is used to tighten the elastic wire, the wire-breaking mechanism is used to cut off the tightened elastic wire, and the wire-switching mechanism is used to switch the elastic wire.

[0009] As a further improvement, the line switching mechanism includes a line hanging mounting plate slidably mounted on the shell, the line hanging mounting plate is connected to the third driving mechanism, and more than two line hanging parts are provided on the line hanging mounting plate. The line taking-up mechanism is located below the line hanging part and cooperates with the line hanging part.

[0010] As a further improvement, the wire-taking mechanism includes a winding roller rotatably mounted on the inner wall of the shell, the winding roller is connected to a second driving mechanism, the winding roller is provided with a winding groove, a wire hook is provided in the winding groove, and the wire hook is located below the wire hanging member and cooperates with the wire hanging member.

[0011] As a further improvement, the wire breaking mechanism includes a connecting tube fixedly connected to the shell, the connecting tube is connected to the tying head, a rotating part is rotatably installed in the connecting tube, the end of the rotating part close to the tying head is connected to a cutter, the other end of the rotating part is connected to the first drive mechanism, and the cutter cooperates with the threading hole.

[0012] As a further improvement, the threading hole passes through the side wall of the tying head from the front end to the rear end, one end of the threading hole opens to the inside of the connecting tube, the outer part of the rear end face of the tying head is provided with a rotary cut surface, the threading hole opens on the rotary cut surface, and the cutter slides in cooperation with the rotary cut surface.

[0013] As a further improvement, the cutter includes a blade and a blade holder, one end of the blade holder is fixedly connected to the end wall of the rotating member, and the other end of the blade holder is fixedly connected to the blade;

[0014] The blade is provided with a first end face and a second end face, the first end face is parallel to the rotary cutting surface and abuts against the rotary cutting surface, the second end face is fixedly connected to the tool holder, the first end face and the second end face intersect to form a blade, and the blade is slidably fitted with the rotary cutting surface.

[0015] As a further improvement, the negative pressure device includes a negative pressure tube, one end of which is connected to the ligation cavity of the ligation head;

[0016] The negative pressure device also includes a pressure relief switch, which includes an adapter, which is fixed on the inner wall of the shell. The adapter includes a main air duct and a bronchial duct connected to the main air duct. One end of the main air duct is connected to the negative pressure mechanism through the trachea, and the other end is connected to the other end of the negative pressure tube through the trachea. A sealing plug is provided at the pipe mouth of the bronchial duct, and the sealing plug is connected to the fourth driving mechanism.

[0017] As a further improvement, the fourth driving mechanism includes a rotating rod, the middle portion of which is rotatably connected to the inner side wall of the housing, one end of which is fixedly connected to the sealing plug, and the other end of which protrudes downwardly perpendicular to its rotation plane to form a connecting shaft, and the connecting shaft is connected to a pressure relief button;

[0018] The pressure relief button includes a rod body, one end of the rod body passes through the shell and is located outside the shell, the other end of the rod body is provided with an elliptical first slot, the length extension direction of the first slot is perpendicular to the axial direction of the rod body, the connecting shaft is slidably fitted with the first slot, a stopper is fixed on the side wall of the rod body, the end face of the stopper is abutted against the inner wall of the shell, a baffle is fixed on the inner wall of the shell, the rod body passes through the baffle, and a spring is connected between the baffle and the stopper.

[0019] As a further improvement, an elastic line is passed through each threading hole of the tying head, one end of the elastic line is provided with a tying knot, the tying knot is arranged on the outer surface of the tying head, the other end of the elastic line is provided with a hanging knot, the hanging knot is hung on the hanging piece, and the elastic line passes through the threading hole and is connected to the switching line mechanism.

[0020] The present invention also provides a method for using the multi-shot anorectal ligation device. The method comprises:

[0021] Hang the hanging rope knot at one end of the elastic line on the hanging piece of the switching line mechanism, pass the other end of the elastic line through the threading hole and put the tying rope knot on the outer surface of the tying head;

[0022] Control the operation of the negative pressure device to make the set negative pressure value reach the ligation head and pipeline;

[0023] Control the line switching mechanism to move the line hanging part of the line switching mechanism to the line hooking position.

[0024] Control the operation of the line-reeling mechanism so that the line-hooking member hooks the tying knot on the line-hanging member and continues to reel in the line;

[0025] During the winding process, the tension of the elastic line is monitored. When the elastic line reaches the set tension, the line breaking mechanism is controlled to operate to cut the elastic line.

[0026] Control the negative pressure device to stop running and open the pressure relief switch;

[0027] Move the ligature head to other lesion locations and repeat the above steps.

[0028] Due to the adoption of the above technical solution, the beneficial technical effects of the present invention are:

[0029] The ligature is then tightened by the thread-retracting mechanism so that the ligature is pulled down and the ligature is tightened, thereby completing the ligation of the lesion tissue.

[0030] The anorectal ligation device used in the prior art is only equipped with one elastic line, which can only ligature one lesion tissue. If there are other lesion tissues, a new anorectal ligation device needs to be replaced. The present application can be equipped with two or more elastic lines. Compared with the prior art, the elastic lines can be continuously replaced without replacing the ligation device, and ligation operations can be performed on multiple lesion tissues, reducing the consumption of medical equipment and saving medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the external structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall internal structure of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the negative pressure device of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the pressure relief switch of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the rotating rod of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the pressure relief button of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the wire take-up mechanism of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the wire breaking mechanism of the present invention;

[0039] Figure 9 This is a schematic diagram of the assembly of the banding head and the cutter of the present invention;

[0040] Figure 10 This is a schematic diagram of the assembly of the elastic thread snap fastener and the tying head of the present invention;

[0041] Figure 11 It is a schematic structural diagram of the cutter of the present invention;

[0042] Figure 12 It is a structural schematic diagram of the switching line mechanism of the present invention;

[0043] Figure 13 It is a structural schematic diagram of the thread hooking member and the thread hanging member of the present invention.

[0044] Among them: 1-shell, 101-baffle, 2-negative pressure device, 201-negative pressure tube, 202-negative pressure mechanism, 203-sleeve head, 2031-suction end, 2032-connecting end, 2033-sleeve cavity, 2034-threading hole, 2035-rotary cutting surface, 3-take-up mechanism, 301-winding roller, 3011-winding groove, 302-hook wire member, 4-switching wire mechanism, 401-hanging wire mounting plate, 402-hanging wire member, 4021-first notch, 5-breaking wire mechanism, 501-rotating member, 502-connecting pipe, 503-cutter, 5031-blade, 50311-first end face, 50312-second end face, 5032-knife holder, 6-second driving mechanism, 601 -First bevel gear, 602-Second motor, 603-Second bevel gear, 7-Elastic line, 701-Hanging line knot, 702-Tie knot, 8-First driving mechanism, 801-First motor, 802-First gear, 803-Second gear, 9-Pressure relief switch, 901-Adapter, 9011-Main air duct, 9012-Borne air duct, 902-Sealing plug, 903-Fourth driving mechanism, 9031-Rotating rod, 9032-Connecting shaft, 9033-Pressure relief button, 90331-Rod body, 90332-First slot, 9034-Block, 9035-Spring, 10-Third driving mechanism, 1001-Rack, 1002-Third motor, 1003-Third gear. DETAILED DESCRIPTION

[0045] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the scope of protection of the present invention. Those who do not specify specific conditions in the embodiments are carried out according to normal conditions or the conditions recommended by the manufacturer. Those whose reagents or instruments are not specified by the manufacturer are conventional products that can be purchased commercially.

[0046] like Figure 1-13 As shown, a multi-shot anorectal ligation device includes a shell 1, a negative pressure device 2, a wire-reeling mechanism 3, and a wire-switching mechanism 4 are provided in the shell 1, the shell 1 is connected to the wire-breaking mechanism 5, the front end of the wire-breaking mechanism 5 is connected to the ligation head 203, the outer surface of the ligation head 203 is used to set the elastic line knot, specifically, one end of the elastic line 7 is provided with a ligation knot 702, and the other end is provided with a hanging line knot 701, the ligation knot 702 is set on the outer surface of the ligation head 203, and the ligation head 203 is provided with a ligation knot for accommodating the lesion. The ligation cavity 2033 of the tissue is specifically, the front end of the ligation head 203 is a suction end 2031, and the other end is a connecting end 2032. The end surface of the suction end 2031 is provided with a ligation cavity 2033 for accommodating the diseased tissue. The ligation cavity 2033 is connected to the negative pressure device 2, and the negative pressure device 2 is used to form a negative pressure in the ligation cavity 2033. The ligation head 203 is provided with two or more threading holes 2034 for the elastic wire 7 to pass through. One end of the threading hole 2034 is open on the end surface of the suction end of the ligation head 203;

[0047] The wire-taking mechanism 3 is used to tighten the elastic wire 7 , the wire-breaking mechanism 5 is used to cut the tightened elastic wire 7 , and the wire-switching mechanism 4 is used to switch the elastic wire 7 .

[0048] The ligature head 203 of this embodiment is provided with more than two threading holes 2034, which can be used to thread more than two elastic lines 7. The ligature knot 702 of the elastic line 7 is sleeved on the outer surface of the ligature head 203. When in use, the ligature head 203 is brought close to the lesion tissue, and the negative pressure device 2 is operated to form a negative pressure in the ligature cavity 2033 of the ligature head 203. The ligature head 203 is close to and sucks the lesion tissue in. Then, the elastic line 7 is tightened by the take-up mechanism 3, and the ligature knot 702 of the elastic line 7 slides off the outer surface of the ligature head 203 and is sleeved on the lesion tissue. As the elastic line 7 is tightened, the ligature knot 702 is tightened on the lesion tissue, and then the elastic line 7 is cut off by the wire-breaking mechanism 5 to complete the ligation operation on one lesion tissue. At this time, the negative pressure device 2 is controlled to restore the ligation cavity 2033 of the ligation head 203 to normal pressure, and the ligation head 203 is separated from the lesion tissue after the ligation is completed. The ligation head 203 is moved to be close to other lesion tissues that need to be ligated, and the new elastic line 7 is connected to the wire-winding mechanism 3 by switching the wire mechanism 4, and then the negative pressure device 2 is operated, and the above steps are repeated to perform the ligation operation. The ligation operation of multiple lesions can be achieved without changing the anorectal ligation device.

[0049] In this embodiment, the switching line mechanism 4 includes a line hanging mounting plate 401 slidably mounted on the shell 1, the line hanging mounting plate 401 is connected to the third driving mechanism 10, and the line hanging mounting plate 401 is provided with more than two line hanging parts 402. The number of line hanging parts 402 corresponds to the number of elastic lines 7 and the number of threading holes 2034. The line taking-up mechanism 3 is located below the line hanging part 402 and cooperates with the line hanging part 402.

[0050] Specifically, a sliding groove is provided on the inner wall of the housing 1, and the wire hanging mounting plate 401 is connected to the rack 1001. The rack 1001 slides in the sliding groove. The third driving mechanism 10 includes a third motor 1002 fixedly mounted on the housing 1. The third motor 1002 is connected to a third gear 1003, which meshes with the rack 1001. The third motor 1002 drives the third gear 1003 to rotate, and the third gear 1003 drives the rack 1001 and the wire hanging mounting plate 401 to move along the sliding groove.

[0051] In this embodiment, the wire taking-up mechanism 3 includes a winding roller 301 rotatably mounted on the inner wall of the shell 1, the winding roller 301 is connected to the second driving mechanism 6, the winding roller 301 is provided with a winding groove, and the winding groove is provided with a wire hook member 302, the wire hook member 302 is located below the wire hanging member 402 and cooperates with the wire hanging member 402.

[0052] One side of the wire hanging mounting plate 401 is fixedly connected to the rack 1001, and the wire hanging member 402 is fixedly installed at the bottom position of the other side of the wire hanging mounting plate 401. The wire hanging members 402 are arranged vertically and spaced apart from each other. The wire hanging member 402 and the wire hook member 302 both include a rod and a hook. The bottom of the rod of the wire hanging member 402 is provided with a first notch 4021 extending from the front to the back. The bottom of the rod of the wire hanging member 402 is located on both sides of the first notch 4021 and has hooks extending backward. The top of the rod of the wire hook member 302 is connected to a hook extending backward. The top of the hook of the wire hook member 302 is lower than the top of the wire hanging member 402 and higher than the bottom of the wire hanging member 402, so that the wire hook member 302 can pass through the first notch 4021. The width of the first notch 4021 gradually decreases from the bottom to the top, making it easier to hook the wire.

[0053] When in use, one end of the elastic line 7 is knotted to form a hanging line knot 701 and is hooked by the hook line member 302, and the other end of the elastic line 7 is knotted to form a tying knot 702 which is sleeved on the outer surface of the tying head 203, and the third motor 1002 is controlled to operate to drive the third gear 1003 to rotate, driving the rack 1001 engaged with it to move, and further driving the hanging line mounting plate 401 and the hanging line member 402 thereon to move until they move to just above the winding roller 301, and controlling the second driving mechanism 6 to drive the winding roller 301 to rotate so that the hook line member 302 moves, and the hook portion of the hook line member 302 passes through the first notch 4021, and can hook the hanging line knot 701 on the hook portion of the hook line member 302, and as the winding roller 301 rotates, the hook line member 302 drives the hanging line knot 701 to detach from the hanging line member 402, and as the winding roller 301 continues to rotate,

[0054] The elastic line 7 is wound around the winding roller 301 circle by circle and gradually tightened until the ligation knot 702 slides off the outer surface of the ligation head 203 and is tied to the root of the lesion tissue. As the elastic line 7 continues to be tightened, the ligation knot 702 tied to the root of the lesion tissue is tightened.

[0055] After the elastic line 7 that has been tied is cut off, the third driving mechanism 10 drives the line hanging mounting plate 401 to move, so that the line hanging member 402 with the elastic line 7 is matched with the line hooking member 302, and the line hooking member 302 hooks the new elastic line 7 to complete the line switching operation.

[0056] In this embodiment, the second driving mechanism 6 includes a first bevel gear 601 fixedly connected to one end surface of the winding roller 301. A second motor 602 is fixedly installed inside the housing 1. A second bevel gear 603 is fixedly connected to the output shaft of the second motor 602. The first bevel gear 601 is meshed with the second bevel gear 603. The rotation of the second motor 602 drives the second bevel gear 603 to rotate, and the second bevel gear 603 drives the first bevel gear 601 and the winding roller 301 to rotate.

[0057] Specifically, a current sensor and a relay are connected to the power line of the second motor 602, and each is connected to a controller. The current sensor detects the current flowing through the second motor 602 and transmits the detection result to the controller. The controller sends a command to the relay based on the detection result of the current sensor. The relay, based on the command from the controller, connects or disconnects the circuit connected to the second motor 602, thereby controlling the start and stop of the second motor 602.

[0058] Specifically, during the initial stage of tensioning the elastic cord 7, the current within the second motor 602 is within a normal range. As the elastic cord 7 is further tightened, the load on the second motor 602 gradually increases, and the current within it also gradually increases. When the elastic cord 7 is tensioned to the ideal state, the current within the second motor 602 reaches the set value, and the controller issues a stop command to the second motor 602, causing it to stop. With this force, the elastic cord 7 is tightened and wrapped around the base of the affected tissue.

[0059] In this embodiment, the wire breaking mechanism 5 includes a connecting tube 502 fixedly connected to the shell 1, the connecting tube 502 is connected to the tying head 203, a rotating part 501 is rotatably installed in the connecting tube 502, and the end of the rotating part 501 close to the tying head 203 is connected to the cutter 503, and the other end of the rotating part 501 is connected to the first driving mechanism 8, and the cutter 503 cooperates with the threading hole 2034.

[0060] In this embodiment, the first drive mechanism 8 includes a first motor 801 fixedly mounted on the housing 1. A first gear 802 is fixedly connected to the output shaft of the first motor 801. A second gear 803 is fixedly mounted on the outer wall of the rotating member 501 at one end near the housing 1. The first gear 802 meshes with the second gear 803. The rotation of the first motor 801 drives the first gear 802, which in turn drives the second gear 803 and the rotating member 501.

[0061] Specifically, the rotating part 501 is a metal tube with good rigidity. The rotating part 501 and the cutter 503 are integrally formed. The outer wall of the rotating part 501 rotates with the inner wall of the connecting tube 502. In addition, the elastic line 7 is arranged inside the rotating part 501, which can effectively reduce the external size of the connecting tube 502 and make it more flexible to use.

[0062] The rotating member 501 made of metal has good mechanical properties and prevents the rotating member 501 from bending or deforming during the cutting of the elastic wire 7. The connecting tube 502 serves as a supporting connection and limits the radial position of the rotating member 501.

[0063] In this embodiment, the threading hole 2034 passes through the side wall of the tying head 203 from the front end to the rear end. One end of the threading hole 2034 opens to the inside of the connecting tube 502. The outer part of the rear end surface of the tying head 203 is provided with a rotary cut surface 2035. The threading hole 2034 opens on the rotary cut surface 2035, and the cutter 503 slides in cooperation with the rotary cut surface 2035.

[0064] In this embodiment, the cutter 503 includes a blade 5031 and a blade holder 5032. One end of the blade holder 5032 is fixedly connected to the end wall of the rotating member 501, and the other end of the blade holder 5032 is fixedly connected to the blade 5031.

[0065] The blade 5031 is provided with a first end face 50311 and a second end face 50312. The first end face 50311 is parallel to the rotary cutting surface 2035 and abuts against the rotary cutting surface 2035. The second end face 50312 is fixedly connected to the tool holder 5032. The first end face 50311 and the second end face 50312 intersect to form a blade, and the blade slides in conjunction with the rotary cutting surface 2035.

[0066] The rotary cut surface 2035 serves to limit the axial position of the cutter 503 and provides force support for the cutter 503 to cut the elastic wire 7 .

[0067] In this embodiment, the negative pressure device 2 can use a device that is commonly used in the prior art to generate a negative pressure environment. This is not specifically limited here, and only one specific structure that can be implemented is described. Specifically, the negative pressure device 2 used in this application includes a negative pressure tube 201, which is disposed within the rotating member 501. One end of the negative pressure tube 201 is connected to the negative pressure mechanism 202, and the other end is connected to the ligation cavity 2033 of the ligation head 203.

[0068] Specifically, the operation of the negative pressure mechanism 202 generates negative pressure in the ligation cavity 2033, thereby sucking the diseased tissue into the ligation cavity 2033. The negative pressure mechanism 202 is integrated into the interior of the housing 1. Specifically, it can be a negative pressure mechanism in the prior art, such as a negative pressure pump or a vacuum pump. This allows the anorectal ligation device to generate negative pressure without the need for an external vacuum device. It also avoids complex and lengthy external wiring that would interfere with the ligation operation, making the entire device more convenient and flexible to use.

[0069] The negative pressure device 2 also includes a pressure relief switch 9, which includes an adapter 901 fixedly mounted on the inner wall of the housing 1. The adapter 901 includes a main gas line 9011 and a bronchial line 9012 connected to the main gas line 9011. One end of the main gas line 9011 is connected to the negative pressure mechanism 202 via the trachea, and the other end is connected to the negative pressure tube 201 via the trachea. A sealing plug 902 is provided at the opening of the bronchial line 9012, which is connected to a fourth driving mechanism 903. The pressure relief switch 9 is used to eliminate the negative pressure in the ligation cavity 2033, thereby separating the ligation head 203 from the ligated lesion tissue.

[0070] When the elastic line 7 is cut, the negative pressure mechanism 202 is closed, and the fourth driving mechanism 903 drives the sealing plug 902 to move and separate from the tube opening of the bronchial duct 9012. External air enters the ligation cavity 2033 from the bronchial duct 9012. After the negative pressure disappears, the ligation head 203 is separated from the ligated lesion tissue.

[0071] In this embodiment, the fourth driving mechanism 903 includes a rotating rod 9031, the middle portion of the rotating rod 9031 is rotatably connected to the inner wall of the housing 1, one end of the rotating rod 9031 is fixedly connected to the sealing plug 902, and the other end of the rotating rod 9031 protrudes downward perpendicularly to its rotation plane to form a connecting shaft 9032, and the connecting shaft 9032 is connected to a pressure relief button 9033. Figure 4 As shown, the pressure relief button 9033 is pressed to the right, and the pressure relief button 9033 drives the rotating rod 9031 to rotate counterclockwise, thereby driving the sealing plug 902 to separate from the tube opening of the bronchial tube 9012.

[0072] In this embodiment, the pressure relief button 9033 includes a rod body 90331, one end of the rod body 90331 passes through the shell 1 and is located outside the shell 1, and the other end of the rod body 90331 is provided with an elliptical first slot 90332, the length extension direction of the first slot 90332 is perpendicular to the axial direction of the rod body 90331, the connecting shaft 9032 is slidably fitted with the first slot 90332, and a stop block 9034 is fixed on the side wall of the rod body 90331, the end face of the stop block 9034 is against the inner wall of the shell 1, and a baffle 101 is fixed on the inner wall of the shell 1, the rod body 90331 passes through the baffle 101, and a spring 9035 is connected between the baffle 101 and the stop block 9034.

[0073] Stopper 9034 limits the movement of rod 90331. Stopper 9034 also supports spring 9035. When pressure relief button 9033 is manually pressed, it slides rightward, compressing spring 9035. When pressure relief button 9033 is released, the spring 9035 returns it to its original position.

[0074] The end of the sealing plug 902 near the opening of the bronchial tube 9012 has a first chamfer, and the inner wall of the opening of the bronchial tube 9012 has a second chamfer, which mates with the first chamfer. The sealing plug 902 is made of a relatively soft material, which allows the sealing plug 902 to fit more tightly with the bronchial tube 9012 and prevent air leakage.

[0075] In this embodiment, an elastic line 7 is passed through each threading hole 2034 of the tying head 203. The tying knot 702 at one end of the elastic line 7 is a slipknot, which is sleeved on the outer surface of the tying head 203. The hanging knot 701 at the other end of the elastic line 7 is hung on the hanging piece 402. The elastic line 7 passes through the threading hole 2034 and is connected to the switching line mechanism 4.

[0076] The present invention also provides a method for using the multi-shot anorectal ligation device. The method includes:

[0077] The hanging rope knot 701 at one end of the elastic line 7 is hung on the hanging piece 402 of the switching line mechanism 4, and the other end of the elastic line 7 is passed through the gap between the negative pressure tube 201 and the rotating part 501 and the threading hole 2034 in sequence, and then the tying rope knot 702 is put on the outer surface of the tying head 203. The tying rope knot 702 is a slipknot knot. The tying order of the elastic line 7 and the tying order of the tying rope knot 702 need to be reasonably arranged. Specifically, the tying rope knot of the elastic line 7 that is tied and tightened last is at the rear end on the outer surface of the tying head 203, and the tying rope knots 702 of the elastic lines 7 that are tied and tightened later are tied in sequence, and the tying rope knot 702 of the elastic line 7 that is tied and tightened first is put on the front end of the tying head 203;

[0078] Place the ligation head 203 close to the lesion tissue to be ligated, control the negative pressure device 2 to operate, and make the ligation head 203 and the pipeline reach the set negative pressure value. As the ligation head 203 moves, the lesion tissue is sucked into the ligation cavity 2033 of the ligation head 203;

[0079] Controlling the line switching mechanism 4 to operate so that the line hanging member 402 of the line switching mechanism 4 moves to the line hooking position;

[0080] Control the operation of the take-up mechanism 3. Specifically, the second motor 602 drives the winding roller 301 to rotate, driving the hooking member 302 to move to the position of the hanging member 402, hooking the hanging knot 701 on the hanging member 402, and the winding roller 301 continues to rotate to take up the line, tightening the elastic line 7. As the elastic line 7 is tightened, the tying knot 702 of the elastic line 7 moves from the outer surface of the tying head 203 to the suction end 2031 and slides down to be tied to the part of the end face of the suction end 2031 of the tying head 203 corresponding to the lesion tissue. The further tightening of the elastic line 7 causes the ligature knot 702 to be tightened and tied to the lesion tissue. During the tightening process of the ligature knot 702, since the threading hole 2034 is opened on the surface of the suction end 2031 of the ligature head 203, corresponding to the position of the ligature knot 702 tied to the lesion tissue, the elastic line 7 at one end of the ligature knot 702 moves toward the threading hole 2034 along the radial direction of the ligature head 203, and no component force is generated to drive the ligature knot 702 to move on the ligature part of the lesion tissue, thereby keeping the ligature part stable.

[0081] During the winding process, the degree of tightening of the elastic cord 7 is monitored. When the elastic cord 7 reaches the set degree of tightening, the wire-breaking mechanism 5 is controlled to operate to cut the elastic cord 7. Specifically, the first motor 801 drives the rotating member 501 to rotate via the first gear 802 and the second gear 803, thereby driving the cutter 503 to rotate. The cutter 503 cuts the taut elastic cord 7. Specifically, the operation of the wire-breaking mechanism 5 can be controlled by sending a pulse signal.

[0082] The negative pressure device 2 is controlled to stop running, the pressure relief switch is turned on, and the pressure relief button 9033 is pressed to restore the pressure in the ligation cavity 2033 of the ligation head 203 to normal pressure, and the ligation head 203 is separated from the lesion tissue;

[0083] Move the multi-shot anorectal ligation device to another lesion location and repeat the above steps. Multiple lesions can be ligated without changing the ligation device.

[0084] In this embodiment, a controller is specifically provided to control the operation of the negative pressure device 2, the wire taking-up mechanism 3, the wire switching mechanism 4 and the wire breaking mechanism 5. The controller can specifically be the control circuit and control chip used in the prior art, and a display screen is provided to display certain information during the operation, such as the pressure of the negative pressure device 2, the number of elastic wires 7 used, etc., to provide the operator with auxiliary information for easy operation.

[0085] A display screen is installed on the outside of the shell 1 for displaying information such as the negative pressure value in the ligation cavity 2033 so that the operator can understand the relevant parameters in real time. Specifically, a battery is set inside the shell 1 to provide power for the controller, display screen, negative pressure device 2, wire taking-up mechanism 3, wire switching mechanism 4 and wire breaking mechanism 5.

[0086] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A multi-shot anorectal ligation device, comprising a housing, characterized in that: A negative pressure device, a wire taking-up mechanism, and a wire switching mechanism are provided in the shell, the shell is connected to a wire breaking mechanism, the front end of the wire breaking mechanism is connected to a ligature head, the outer surface of the ligature head is used to set an elastic wire knot, a ligature cavity for accommodating lesion tissue is provided in the ligature head, the ligature cavity is connected to the negative pressure device, and the negative pressure device is used to form a negative pressure in the ligature cavity, the ligature head is provided with two or more threading holes for the elastic wire to pass through, and one end of the threading hole is opened on the front end surface of the ligature head; The wire-taking mechanism is used to tighten the elastic wire, the wire-breaking mechanism is used to cut off the tightened elastic wire, and the wire-switching mechanism is used to switch the elastic wire; The line switching mechanism includes a line hanging mounting plate slidably mounted on the housing, the line hanging mounting plate is connected to the third driving mechanism, and the line hanging mounting plate is provided with two or more line hanging members, and the line taking-up mechanism is located below the line hanging members and cooperates with the line hanging members; The wire-taking mechanism includes a wire winding roller rotatably mounted on the inner wall of the housing, the wire winding roller is connected to the second driving mechanism, the wire winding roller is provided with a wire winding groove, a wire hooking member is provided in the wire winding groove, and the wire hooking member is located below the wire hanging member and cooperates with the wire hanging member; An elastic line is passed through each threading hole of the tying head, one end of the elastic line is provided with a tying knot, the tying knot is sleeved on the outer surface of the tying head, the other end of the elastic line is provided with a hanging knot, the hanging knot is hung on the hanging piece, and the elastic line passes through the threading hole and is connected to the switching line mechanism.

2. The multi-shot anorectal ligation device according to claim 1, characterized in that: The wire breaking mechanism includes a connecting tube fixedly connected to the shell, the connecting tube is connected to the tying head, a rotating part is rotatably installed in the connecting tube, one end of the rotating part close to the tying head is connected to a cutter, the other end of the rotating part is connected to the first driving mechanism, and the cutter cooperates with the threading hole.

3. The multi-shot anorectal ligation device according to claim 2, characterized in that: The threading hole passes through the side wall of the tying head from the front end to the rear end, one end of the threading hole opens to the inside of the connecting tube, the outer part of the rear end face of the tying head is provided with a rotary cut surface, the threading hole opens on the rotary cut surface, and the cutter slides in cooperation with the rotary cut surface.

4. The multi-shot anorectal ligation device according to claim 3, characterized in that: The cutter includes a blade and a blade holder, one end of the blade holder is fixedly connected to the end wall of the rotating member, and the other end of the blade holder is fixedly connected to the blade; The blade is provided with a first end face and a second end face, the first end face is parallel to the rotary cutting surface and abuts against the rotary cutting surface, the second end face is fixedly connected to the tool holder, the first end face and the second end face intersect to form a blade, and the blade is slidably fitted with the rotary cutting surface.

5. The multi-shot anorectal ligation device according to claim 1, characterized in that: The negative pressure device comprises a negative pressure tube, one end of which is connected to the ligation cavity of the ligation head; The negative pressure device also includes a pressure relief switch, which includes an adapter, which is fixed on the inner wall of the shell. The adapter includes a main air duct and a bronchial duct connected to the main air duct. One end of the main air duct is connected to the negative pressure mechanism through the trachea, and the other end is connected to the other end of the negative pressure tube through the trachea. A sealing plug is provided at the pipe mouth of the bronchial duct, and the sealing plug is connected to the fourth driving mechanism.

6. The multi-shot anorectal ligation device according to claim 5, characterized in that: The fourth driving mechanism includes a rotating rod, the middle portion of which is rotatably connected to the inner side wall of the housing, one end of which is fixedly connected to the sealing plug, and the other end of which protrudes downwardly perpendicular to its rotation plane to form a connecting shaft, and the connecting shaft is connected to a pressure relief button; The pressure relief button includes a rod body, one end of the rod body passes through the shell and is located outside the shell, the other end of the rod body is provided with an elliptical first slot, the length extension direction of the first slot is perpendicular to the axial direction of the rod body, the connecting shaft is slidably fitted with the first slot, a stopper is fixed on the side wall of the rod body, the end face of the stopper is abutted against the inner wall of the shell, a baffle is fixed on the inner wall of the shell, the rod body passes through the baffle, and a spring is connected between the baffle and the stopper.

7. The method for using the multi-shot anorectal ligation device is characterized in that: Using the multi-shot anorectal ligation device according to any one of claims 1 to 6, the method of using the device comprises: Hang the hanging rope knot at one end of the elastic line on the hanging piece of the switching line mechanism, pass the other end of the elastic line through the threading hole and put the tying rope knot on the outer surface of the tying head; Control the operation of the negative pressure device to make the set negative pressure value reach the ligation head and pipeline; Control the line switching mechanism to move the line hanging part of the line switching mechanism to the line hooking position. Control the operation of the line-reeling mechanism so that the line-hooking member hooks the tying knot on the line-hanging member and continues to reel in the line; During the winding process, the tension of the elastic line is monitored. When the elastic line reaches the set tension, the line breaking mechanism is controlled to operate to cut the elastic line. Control the negative pressure device to stop running and open the pressure relief switch; Move the ligature head to other lesion locations and repeat the above steps.

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