A magnetic compression anastomosis system for laparoscopic cholecystoenterostomy

Abstract

The invention discloses a magnetic compression anastomosis system for laparoscopic choledochojejunostomy, comprising a firing gun (1), a sub-magnetic ring (2), a mother magnetic ring (3) and an auxiliary rod (4); the mother magnetic ring (3) is positioned at the stump of a common bile duct (B) in a purse-string suture manner and the relative position is fixed by the auxiliary rod (4); the firing gun (1) is loaded with the sub-magnetic ring (2) and the sub-magnetic ring (2) is connected to the mother magnetic ring (2) through the intestinal cavity of an intestinal tract (C); the distance between the sub-magnetic ring (2) and the mother magnetic ring (3) is continuously shortened by a push knob (101) of the firing gun (1); when the relative distance between the sub-magnetic ring (2) and the mother magnetic ring (3) is the shortest and they are attracted to each other, the firing gun (1) is separated from the sub-magnetic ring (2) by an excitation mechanism (107) of the firing gun (1) to achieve laparoscopic choledochojejunostomy. It can improve the accuracy and safety of laparoscopic magnetic compression choledochojejunostomy and reduce the operational difficulty of laparoscopic magnetic compression choledochojejunostomy.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an anastomosis system for laparoscopic cholechojejunostomy, and in particular to a magnetic compression anastomosis system for laparoscopic cholechojejunostomy. Background Art

[0002] Minimally invasive surgery is a trend in the development of surgical procedures. Laparoscopic technology is an important way to achieve minimally invasive abdominal surgery. At present, many classic abdominal surgeries can be performed laparoscopically, such as cholecystectomy, subtotal gastrectomy, etc. Since laparoscopic anastomosis is relatively difficult, some operations are still difficult to perform under laparoscopic conditions, such as laparoscopic cholechojejunostomy. Magnetic compression anastomosis technology is an emerging sutureless surgical anastomosis technology. Its outstanding advantage is that it utilizes the interaction of magnets to achieve continuous recanalization of the duct without traditional suturing operations, which can greatly reduce the difficulty of related suturing operations under laparoscopic conditions.

[0003] Currently, there are devices used in laparoscopic magnetic compression choledochojejunostomy, which have significant advantages over traditional manual suturing. However, the following problems still exist:

[0004] 1) Accuracy: In the past, laparoscopic magnetic compression choledochojejunostomy devices could only be equipped with one specification of sub-magnetic rings, and different specifications of firing guns were required for different tube diameters. Therefore, it could not be flexibly adjusted according to the actual situation during the operation. Too small a diameter would cause bile duct stenosis, and too large a diameter would cause bile leakage.

[0005] 2) Operability: In the past, the most difficult operation for laparoscopic magnetic compression choledochojejunostomy was the docking of the firing gun and the mother magnetic ring. After the mother magnetic ring was placed at the end of the bile duct through purse-string suture, its position could not be fixed. On the one hand, it would retreat into the bile duct due to operational factors, and the radial relationship between the mother magnetic ring and the bile duct would often change after retreating into the bile duct. At this time, the purse-string suture had to be performed again. On the other hand, the docking rod of the firing gun was not easy to enter the inner drainage tube of the mother magnetic ring, making it difficult to achieve docking.

[0006] 3) Safety: Previous laparoscopic magnetic compression choledochojejunostomy devices lacked safety mechanism design, could not clearly define the relative positions of the male and female magnetic rings, and could not provide feedback on the implementation of key actions, which was not conducive to the control of the operation process. In addition, there was no effective mechanism to prevent misoperation.

[0007] Therefore, it is necessary to develop a magnetic compression anastomosis system for laparoscopic cholecystoenteric anastomosis that can reduce the difficulty of laparoscopic cholecystoenteric anastomosis and improve the accuracy and safety of laparoscopic cholecystoenteric anastomosis. Summary of the invention

[0008] In view of the above problems, the present invention provides a magnetic compression anastomosis system for laparoscopic cholecystoenteric anastomosis, which can reduce the difficulty of laparoscopic cholecystoenteric anastomosis and improve the accuracy and safety of laparoscopic cholecystoenteric anastomosis.

[0009] To this end, the present invention provides a magnetic compression anastomosis system for laparoscopic choledochojejunostomy, comprising a launching gun, a sub-magnetic ring, a mother magnetic ring and an auxiliary rod, characterized in that the mother magnetic ring is positioned at the stump of the common bile duct in a purse-string suture manner, and the relative position is fixed by the auxiliary rod, the launching gun is loaded with the sub-magnetic ring and the sub-magnetic ring is docked with the mother magnetic ring through the intestinal cavity of the intestinal tract, the auxiliary rod assists the mother magnetic ring in docking with the launching gun, and the distance between the sub-magnetic ring and the mother magnetic ring is continuously shortened by the pushing knob of the launching gun, and when the relative distance between the sub-magnetic ring and the mother magnetic ring is closest and mutual attraction is achieved, the launching gun is separated from the sub-magnetic ring by the excitation mechanism of the launching gun to achieve laparoscopic choledochojejunostomy.

[0010] Optionally, the launch gun includes a push knob, a docking rod, an excitation sleeve, a loading sleeve, a loading slot, an excitation mechanism, a shell, a sensory feedback mechanism and a firing pin, wherein the front end of the push button is connected to the rear end of the docking rod through a spring mechanism, the front end of the docking rod is provided with a hook structure that can dock with the mother magnetic ring, the docking rod is located in the excitation sleeve, the excitation sleeve is connected to the excitation mechanism, the sensory feedback mechanism is fixed on the excitation sleeve, the firing pin is arranged in the shell, and when the excitation sleeve moves forward, the sensory feedback mechanism can contact the firing pin, the excitation sleeve is located in the loading sleeve, the loading sleeve is fixed on the shell, the front end of the loading sleeve is detachably connected to the tail of the loading slot, and the sub-magnetic ring is placed in the loading slot.

[0011] Optionally, the firing gun further comprises a display pin and a display frame, wherein the display pin is fixed on the docking rod, and the display frame is arranged in the shell and is used to display the position of the display pin.

[0012] Optionally, the firing gun further comprises a safety bolt, and the excitation sleeve is connected to the safety bolt.

[0013] Optionally, the push knob, loading card slot, safety bolt, excitation mechanism, shell, sensory feedback mechanism, display needle and display frame are made of polymer materials, and the docking rod, excitation sleeve, loading sleeve and firing pin are made of non-paramagnetic stainless steel materials.

[0014] Optionally, the sub-magnetic ring is annular, made of N50 neodymium iron boron material, with titanium nitride coating on the surface, an inner diameter of 5 mm, and an outer diameter of 8-15 mm.

[0015] Optionally, the mother magnetic ring is composed of a mother magnetic shell, a mother magnet and an inner drainage tube, the mother magnet is loaded in the mother magnetic shell, the mother magnetic shell is fixedly connected to the inner drainage tube, and a slot structure is provided in the inner drainage tube, and the slot structure can be docked with the hook structure at the front end of the docking rod.

[0016] Optionally, the mother magnet shell and the inner drainage tube are both made of non-paramagnetic stainless steel material and have an inner diameter of 3mm. The outer diameter of the mother magnet shell is 8-15mm, and the outer diameter of the inner drainage tube is 4mm. The mother magnet is annular, made of N50 neodymium iron boron material, and is titanium nitride coated on the surface. The inner diameter is 5mm and the outer diameter is 7.5-14.5mm.

[0017] Optionally, the auxiliary rod is composed of a supporting mechanism, a trigger mechanism, a connecting rod, a movable joint and a clamping mechanism, wherein the supporting mechanism provides support for the trigger mechanism and the clamping mechanism, the trigger mechanism is connected to the supporting mechanism through a first rotating shaft, so that the trigger mechanism can be opened and closed relative to the supporting mechanism around the first rotating shaft, the rear end of the connecting rod is connected to the trigger mechanism, and the front end is connected to the rear end of the movable joint through a second rotating shaft, and the front end of the movable joint is connected to the clamping mechanism through a third rotating shaft. When the trigger mechanism is opened relative to the supporting mechanism around the first rotating shaft, it will drive the connecting rod to move toward the clamping mechanism and realize the opening of the clamping mechanism through the movable joint. Correspondingly, when the trigger mechanism is closed relative to the supporting mechanism around the first rotating shaft, it will drive the connecting rod to move toward the supporting mechanism and realize the closing of the clamping mechanism through the movable joint. The clamping mechanism can clamp the inner drainage tube of the mother magnetic ring, thereby fixing the mother magnetic ring at the relative position of the stump of the common bile duct and assisting the mother magnetic ring to dock with the launching gun.

[0018] Optionally, the support mechanism and the trigger mechanism are made of polymer materials, and the connecting rod, the movable joint and the clamping machine (405) are made of non-paramagnetic stainless steel.

[0019] Compared with the prior art, the magnetic compression anastomosis system for laparoscopic cholecystoenterostomy of the present invention has the following beneficial effects:

[0020] 1. Improve the accuracy of laparoscopic magnetic compression choledochojejunostomy: The combination of the loading slot and the loading sleeve in the present invention is a detachable design, which allows the sub-magnetic ring to select appropriate specifications according to the actual situation during the operation. One launch gun design can meet the needs of various application scenarios, improve the accuracy of the operation, and reduce the cost for patients.

[0021] 2. Reduce the operational difficulty of laparoscopic magnetic compression bile-enteric anastomosis: The present invention adds an auxiliary rod, and its clamping mechanism can effectively fix the relative position of the mother magnetic ring, so as to prevent it from retreating into the bile duct, avoid re-purse string suturing, and easily dock with the launch gun.

[0022] 3. Improve the safety of laparoscopic magnetic compression cholechojejunostomy: The display needle in the present invention is combined with the display frame to display the relative position of the sub-magnetic ring and the mother magnetic ring, and can assist in the excitation operation; the sensory feedback mechanism will cooperate with the striker to provide feedback on the completion of the excitation action by emitting a "click" sound and making the operator feel a breakthrough; the safety bolt can limit the movement of the excitation mechanism to avoid accidental excitation of the sub-magnetic ring and reduce the occurrence of adverse events. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure and application of the magnetic compression anastomosis system for laparoscopic cholechojejunostomy surgery of the present invention;

[0024] Figure 2 The present invention is a schematic diagram of the structure of a firing gun of a magnetic compression anastomosis system for laparoscopic cholechojejunostomy.

[0025] Figure 3 for Figure 2 This is an enlarged exploded view of part D in the figure.

[0026] Figure 4 It is a schematic diagram of the structure of the sub-magnetic ring of the magnetic compression and anastomosis system used for laparoscopic cholechojejunostomy surgery of the present invention.

[0027] Figure 5 It is a schematic structural diagram of the female magnetic ring of the magnetic compression anastomosis system used for laparoscopic cholechojejunostomy surgery of the present invention.

[0028] Figure 6 It is a schematic structural diagram of the auxiliary rod of the magnetic compression anastomosis system used for laparoscopic cholechojejunostomy surgery of the present invention.

[0029] Figure 7 A schematic diagram showing the sub-magnetic ring being installed in the loading card slot is shown.

[0030] Figure 8 A schematic diagram is shown of the docking of the hook structure at the front end of the docking rod and the slot structure in the inner drainage tube of the female magnetic ring.

[0031] Fig. 9 A schematic diagram is shown in which the excitation sleeve pushes the sub-magnetic ring out of the loading slot and separates the main magnetic ring from the firing gun. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] It should be noted that, in this article, the words "first", "second", "third" and "fourth" are merely used to distinguish the same names, rather than implying the relationship or order between these names.

[0034] The present invention relates to a magnetic compression anastomosis system for laparoscopic cholecystoenterostomy. Figure 1 As shown, it is composed of a launching gun 1, a sub-magnetic ring 2, a main magnetic ring 3 and an auxiliary rod 4.

[0035] The mother magnetic ring 3 is positioned at the stump of the common bile duct B connected to the liver A in a purse-string suture manner, and the relative position is fixed by the auxiliary rod 4. The launch gun 1 is loaded with the sub-magnetic ring 2 and the sub-magnetic ring 2 is docked with the mother magnetic ring 2 through the intestinal passage of the intestinal tract C. The auxiliary rod 4 assists the mother magnetic ring 3 to dock with the launch gun 1. After docking, the auxiliary rod 4 is withdrawn, and the distance between the sub-magnetic ring 2 and the mother magnetic ring 3 is continuously shortened by the push knob 101 of the launch gun 1. When the relative distance between the sub-magnetic ring 2 and the mother magnetic ring 3 is closest and mutual attraction is achieved, the launch gun 1 is separated from the sub-magnetic ring 2 by the excitation mechanism 107 of the launch gun 1 to achieve laparoscopic bile intestinal anastomosis.

[0036] like Figure 2 As shown, the firing gun 1 includes a push knob 101 , a docking rod 102 , an excitation sleeve 103 , a loading sleeve 104 , a loading slot 105 , an excitation mechanism 107 , a housing 108 , a sensory feedback mechanism 109 and a firing pin 110 .

[0037] The housing 108 is used to provide support for other mechanisms of the firing gun 1, and its specific structure is not limited as long as it includes a handle and a buttstock structure.

[0038] The front end of the push button 101 is connected to the rear end of the docking rod 102 through a spring mechanism. The push knob 101 is connected to the rear end of the housing 108 through a thread. In this way, by rotating the push knob 101, the push knob 101 can move forward or backward relative to the housing 108, thereby driving the docking rod 102 to move forward or backward. Specifically, when the push knob 101 is rotated clockwise, the push knob 101 moves forward relative to the housing 108, compresses the spring mechanism, and pushes the docking rod 102 forward through the spring mechanism. When the push knob 101 is rotated counterclockwise, the push knob 101 moves backward relative to the housing 108, releases the compression of the spring mechanism, causes the spring mechanism to retract, and drives the docking rod 102 to move backward through the retraction of the spring mechanism.

[0039] like Figure 8 As shown, the front end of the docking rod 102 is provided with a hook structure that can dock with the mother magnetic ring 3. Through the hook structure, the docking rod 102 can be docked with the mother magnetic ring 3.

[0040] Continue to refer Figure 2 , the docking rod 102 is located in the excitation sleeve 103. The excitation sleeve 103 is connected to the excitation mechanism 107. When a person manually pulls the excitation mechanism 107, the excitation sleeve 103 can be excited by the excitation mechanism 107, so that the excitation sleeve 103 moves forward. The principle of the excitation mechanism 107 is the same as the excitation principle of various existing pistol-type tools, and will not be described in detail here.

[0041] The sensory feedback mechanism 109 is fixed on the excitation sleeve 103. The striker 110 is disposed in the housing 108. When the excitation sleeve 103 moves forward, the sensory feedback mechanism 109 is driven to move forward, so that the sensory feedback mechanism 109 can contact the striker 110. In this way, the sensory feedback mechanism 109 cooperates with the striker 110, and by emitting a "click" sound and making the operator feel a breakthrough, feedback can be given on the completion of the excitation action, so that the operator knows whether the operation is completed, thereby improving the safety of the operation.

[0042] The excitation sleeve 103 is located in the loading sleeve 104. The loading sleeve 104 is fixed on the housing 108.

[0043] like Figure 3As shown, the front end of the loading sleeve 104 is detachably connected to the rear end of the loading slot 105. Preferably, the front end of the loading sleeve 104 is provided with an internal thread, and the rear end of the loading slot 105 is provided with an external thread. The front end of the loading sleeve 104 is detachably connected to the rear end of the loading slot 105 through a thread.

[0044] like Figure 7 As shown, the sub-magnetic ring 2 is placed in the loading slot 105. Preferably, a clamping ring is provided in the loading slot 105. A clamping groove is provided on the outer periphery of the sub-magnetic ring 2. The sub-magnetic ring 2 is loaded in the loading slot 105 by clamping the clamping ring in the clamping groove.

[0045] In the present invention, the loading slot 105 has a variety of specifications to achieve matching with the sub-magnetic rings 2 of different diameters. Since the loading slot 105 is detachably connected to the loading sleeve 104, the sub-magnetic ring 2 can select appropriate specifications according to the actual situation during the operation. One firing gun design can meet the needs of multiple application scenarios, improve the accuracy of the operation, and reduce the cost of the patient.

[0046] Preferably, the firing gun 1 further comprises a display pin 111 and a display frame 112. The display pin 111 is fixed to the docking rod 102 so that it can move with the forward and backward movement of the docking rod 102. The display frame 112 is arranged in the housing 108 and is used to display the position of the display pin 111. In this way, the display pin 111 is combined with the display frame 112 to display the relative position of the sub-magnetic ring 2 and the mother magnetic ring 3, and can assist the excitation operation, thereby improving the safety of laparoscopic magnetic compression bile-intestinal anastomosis.

[0047] More preferably, the firing gun 1 further comprises a safety bolt 106. The excitation sleeve 103 is connected to the safety bolt 106. The safety bolt 106 can limit the movement of the excitation mechanism 107, avoid accidental excitation of the sub-magnetic ring, reduce the occurrence of adverse events, and further improve the safety of laparoscopic magnetic compression bile-enteric anastomosis.

[0048] Preferably, the push knob 101, loading slot 105, safety bolt 106, excitation mechanism 107, housing 108, sensory feedback mechanism 109, display pin 111 and display frame 112 are made of polymer materials. The docking rod 102, excitation sleeve 103, loading sleeve 104 and striker 110 are made of non-paramagnetic stainless steel materials. In this way, they will not affect the magnetism of the sub-magnetic ring 2 and the mother magnetic ring 3 and the mutual attraction of the sub-magnetic ring 2 and the mother magnetic ring 3, and meet the medical and health requirements.

[0049] like Figure 1As shown, when in use, the firing gun 1 can be sterilized by ethylene oxide. The gun head is inserted into the abdominal cavity through the laparoscope and then enters the intestinal cavity through the stump of the intestinal tube C. Figure 7 As shown, the loading slot 105 is composed of a magnetic ring slot at the head and a positioning thread at the tail, and the sub-magnetic ring 2 can be placed in the magnetic ring slot. The magnetic ring slot has a variety of specifications, which are selected according to the actual situation during the operation and with reference to the size of the sub-magnetic ring 2. After the sub-magnetic ring 2 and the loading slot 105 are assembled, the assembly is completed by combining the positioning thread at the tail of the loading slot 105 with the internal thread at the front end of the loading sleeve 104. The combination of the loading slot 105 and the loading sleeve 104 is a detachable design, which is convenient for the selection and replacement of the sub-magnetic ring 2.

[0050] Turn the push knob 101 clockwise to move the docking rod 102 forward (away from the sub-magnetic ring 2). At this time, the display needle 111 on the docking rod 102 also moves forward, and its relative position is displayed by the display frame 112. Figure 5 and 8 As shown, there is a slot structure in the inner drainage tube 303 of the female magnetic ring 3, which can be docked with the hook structure at the front end of the docking rod 102 to achieve the connection between the female magnetic ring 3 and the launch gun 1. It should be noted that Figure 8 It is only a schematic diagram, and its purpose is to show the docking of the female magnetic ring 3 and the docking rod 102 .

[0051] When the hook structure at the front end of the docking rod 102 is docked with the slot structure of the mother magnetic ring 3, the position of the display needle 111 displayed in the display frame 112 is also the relative position of the mother magnetic ring 3 and the sub-magnetic ring 2. At this time, the push knob 101 is turned counterclockwise to move the docking rod 102 backward (toward the sub-magnetic ring 2). At the same time, the docking rod 102 drives the mother magnetic ring 3 to move backward (toward the sub-magnetic ring 2). When the display needle 111 reaches the excitation area in the display frame 112, it indicates that the relative position of the sub-magnetic ring 2 and the mother magnetic ring 3 is appropriate, mutual attraction has been achieved, and the emission operation of the sub-magnetic ring 2 can be performed.

[0052] Then, the safety bolt 106 is unfastened to release the movement restriction of the trigger mechanism 107, and the trigger mechanism 107 is activated. At this time, under the action of the trigger mechanism 107, the trigger sleeve 103 moves forward. Fig. 9As shown, when the excitation sleeve 103 reaches the functional position, it can push the sub-magnetic ring 2 to move forward, thereby disengaging from the loading slot 105, and realizing the separation of the sub-magnetic ring 2 from the launching gun 1. At the same time, the docking rod 102 remains different under the action of inertia, and the mother magnetic ring 3 moves forward together with the sub-magnetic ring 2 under the action of the excitation sleeve 103, so that the docking rod 102 and the mother magnetic ring 3 move backward relative to each other, so that the hook structure at the front end of the docking rod 102 disengages from the slot structure in the internal drainage tube 303, so that the mother magnetic ring 3 is separated from the launching gun 1, and the bile-intestinal anastomosis is completed. At this time, the sensory feedback mechanism 109 on the excitation sleeve 103 will contact the firing pin 110, making a "click" sound and making the operator feel a breakthrough. After the excitation action is completed, the launching gun 1 is withdrawn from the body. It should be noted that Fig. 9 It is only for the purpose of showing that the exciting sleeve pushes the sub-magnetic ring out of the loading slot and separates the main magnetic ring from the firing gun, and is not a true structural diagram of the magnetic compression anastomosis system for laparoscopic choledochojejunostomy of the present invention. Fig. 9 In the figure, for the sake of simplicity, the retaining ring of the loading slot 105 and the retaining groove of the sub-magnetic ring 2 are not shown.

[0053] like Figure 4 As shown, in the present invention, the sub-magnetic ring 2 is annular, made of N50 neodymium iron boron material, with titanium nitride coating on the surface, an inner diameter of 5mm, and an outer diameter of 8-15mm. Since the outer diameter has different specifications (8-15mm), it can meet the needs of different application conditions. The sub-magnetic ring 2 can select different outer diameters (8-15mm) according to the actual width of the bile duct during surgery to avoid bile duct stenosis caused by too small diameter and bile leakage caused by too large diameter.

[0054] When in use, according to the needs during surgery, a character magnetic ring 2 of a suitable size is selected and loaded into the loading card slot 105 .

[0055] like Figure 5 As shown, in the present invention, the mother magnetic ring 3 is in the shape of a hollow mushroom head, which is composed of a mother magnetic shell 301, a mother magnet 302 and an inner drainage tube 303. The mother magnet 302 is loaded in the mother magnetic shell 301. The mother magnetic shell 301 is fixedly connected to the inner drainage tube 303. Preferably, the mother magnetic shell 301 is connected to the inner drainage tube 303 by laser welding. A slot structure is provided in the inner drainage tube 303. Figure 8 As shown, the slot structure can be docked with the hook structure at the front end of the docking rod 102.

[0056] Preferably, the mother magnet shell 301 and the inner drainage tube 303 are both made of non-paramagnetic stainless steel material and have an inner diameter of 3mm. The outer diameter of the mother magnet shell 301 is 8-15mm. The outer diameter of the inner drainage tube 303 is 4mm. The mother magnet 302 is annular, made of N50 neodymium iron boron material, with titanium nitride coating on the surface, an inner diameter of 5mm, and an outer diameter of 7.5-14.5mm. Since the outer diameter of the mother magnetic ring 3 has different specifications (8-15mm), it can meet the needs of different application conditions.

[0057] When in use, the mother magnetic ring 3 is disinfected by ethylene oxide. According to the actual width of the bile duct during the operation, different outer diameters (8-15mm) are selected, which are inserted into the abdominal cavity by poking and are placed at the end of the bile duct by purse-string suture. The internal drainage tube 303 cooperates with the auxiliary rod 4 so that the internal drainage tube 303 can be docked with the docking rod 102 to realize the combination of the mother magnetic ring 3 and the transmitting gun 1. After the transmitting gun 1 is excited, the mother magnetic ring 3 is coupled with the sub-magnetic ring 2 through the mother magnet 302 to complete the bile-intestinal anastomosis. At this time, the internal drainage tube 303 can immediately introduce bile into the intestinal tract.

[0058] like Figure 6 As shown, in the present invention, the auxiliary rod 4 is of gun-like design, which is composed of a support mechanism 401, a trigger mechanism 402, a connecting rod 403, a movable joint 404 and a clamping mechanism 405. The support mechanism 401 provides support for the trigger mechanism 402 and the clamping mechanism 405. The trigger mechanism 402 is connected to the support mechanism 401 through a first rotating shaft, so that the trigger mechanism 402 can be opened and closed relative to the support mechanism 401 around the first rotating shaft. The rear end of the connecting rod 403 is connected to the trigger mechanism 402, and the front end is connected to the rear end of the movable joint 404 through a second rotating shaft. The front end of the movable joint 404 is connected to the clamping mechanism 405 through a third rotating shaft. In this way, when the trigger mechanism 402 is opened relative to the support mechanism 401 around the first rotating shaft, it will drive the connecting rod 403 to move toward the clamping mechanism 405, and realize the opening of the clamping mechanism 405 through the movable joint 404. Accordingly, when the trigger mechanism 402 is closed relative to the support mechanism 401 around the first rotating shaft, it will drive the connecting rod 403 to move toward the support mechanism 401, and realize the closure of the clamping mechanism 405 through the movable joint 404. The clamping mechanism 405 can clamp the inner drainage tube 303 of the mother magnetic ring 3, thereby fixing the mother magnetic ring 3 at the relative position of the stump of the common bile duct B, and assisting the mother magnetic ring 3 to dock with the launch gun 1.

[0059] Preferably, the support mechanism 401 and the trigger mechanism 402 are made of polymer materials. The connecting rod 403, the movable joint 404 and the clamping mechanism 405 are made of non-paramagnetic stainless steel. In this way, they will not affect the magnetism of the sub-magnetic ring 2 and the mother magnetic ring 3 and the mutual attraction between the sub-magnetic ring 2 and the mother magnetic ring 3, and meet the medical and health requirements.

[0060] When in use, the auxiliary rod 4 is sterilized by ethylene oxide, and the front end can be inserted into the abdominal cavity through a laparoscope. The clamping mechanism 405 can be opened and closed by operating the trigger mechanism 402. During the operation, the internal drainage tube 303 is clamped by the clamping mechanism 405, so that the relative position of the mother magnetic ring 3 can be fixed, and it will not be retreated into the bile duct due to operational factors (the purse string needs to be re-sutured at this time). In addition, it also helps to achieve the docking of the mother magnetic ring 3 with the launch gun 1. When the mother magnetic ring 3 is docked with the launch gun 1, the auxiliary rod 4 is withdrawn from the body.

[0061] The working principle of the present invention is described in detail below.

[0062] like Figure 1 As shown, when performing laparoscopic choledochojejunostomy, first select the specifications of the sub-magnetic ring 2 and the mother magnetic ring 3 according to the actual situation during the operation. The specifications of the loading slot 105 are selected with reference to the size of the sub-magnetic ring 2, and the sub-magnetic ring 2 is placed in the loading slot 105, and then the loading slot 105 is connected to the loading sleeve 104 to complete the assembly. The internal drainage tube 303 of the mother magnetic ring 3 is clamped with a laparoscopic separation forceps, and inserted into the residual end of the abdominal bile duct through a laparoscope poke card, and a purse-string suture is performed, and the mother magnetic ring 3 is placed in the bile duct, and then the laparoscopic separation forceps are removed and the auxiliary rod 4 is inserted. The internal drainage tube 303 is clamped by the clamping mechanism 405, thereby fixing the relative position of the mother magnetic ring 3 in the abdominal cavity. The launch gun 1 is loaded with a sub-magnetic ring 2 and inserted into the abdominal cavity through the laparoscope, and then into the intestinal stump. After reaching the predetermined position, the push knob 101 is turned clockwise to move the docking rod 102 forward (backward ion magnetic ring 2), and the head end of the docking rod 102 breaks through the intestinal wall. The auxiliary rod 4 is operated to make the mother magnetic ring 3 and the launch gun 1 move toward each other, so that the card slot structure of the internal drainage tube 303 can be docked with the docking rod 102 using the hook structure at the front end. At this time, the mother magnetic ring 3 and the launch gun 1 are docked. Remove the auxiliary rod 4, turn the push knob 101 counterclockwise, and when the display needle 111 reaches the excitation area in the display frame 112, it indicates that the relative position of the sub-magnetic ring 2 and the mother magnetic ring 3 is appropriate, and mutual attraction has been achieved, and the launch operation of the sub-magnetic ring 2 can be performed. At this time, pull out the safety pin 106, pull the trigger mechanism 107, when you hear the "click" sound of the sensory feedback mechanism 109 contacting the firing pin 110 and feel a breakthrough, it indicates that the sub-magnetic ring 2 and the mother magnetic ring 3 are coupled and the sub-magnetic ring 2 has been fired, remove the firing gun 1 and complete the operation.

[0063] The combination of the loading slot 105 and the loading sleeve 104 is a detachable design, which allows the sub-magnetic ring 2 to select appropriate specifications according to the actual situation during the operation. A firing gun design can meet the needs of multiple application scenarios, improve the accuracy of the operation, and reduce the cost of the patient. The design of the clamping mechanism 405 in the auxiliary rod 4 can effectively fix the relative position of the mother magnetic ring 3, so that it does not retreat into the bile duct, avoids the purse string suture again, and is also easy to dock with the firing gun 1. The display pin 111 is combined with the display frame 112 to display the relative position of the sub-magnetic ring 2 and the mother magnetic ring 3, and can assist in the excitation operation. The sensory feedback mechanism 109 will cooperate with the striker 110, and by emitting a "click" sound and making the operator feel a breakthrough, feedback can be given on the completion of the excitation action. The safety bolt 106 can limit the movement of the excitation mechanism 107 to avoid accidental excitation of the sub-magnetic ring 2 and reduce the occurrence of adverse events.

[0064] The magnetic compression anastomosis system for laparoscopic choledochojejunostomy surgery of the present invention can not only greatly improve the accuracy of laparoscopic magnetic compression choledochojejunostomy and reduce the incidence of bile duct stenosis and bile leakage, but also reduce the operational difficulty of laparoscopic magnetic compression choledochojejunostomy, shorten the operation time, and reduce the learning curve. In addition, the safety of laparoscopic magnetic compression choledochojejunostomy is greatly enhanced by the addition of auxiliary structures.

[0065] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0066] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A magnetic compression anastomosis system for laparoscopic cholecystoenterostomy, comprising a firing gun (1), a sub-magnetic ring (2), a main magnetic ring (3) and an auxiliary rod (4), characterized in that: The mother magnetic ring (3) is positioned at the stump of the common bile duct (B) in a purse-string suture manner and the relative position is fixed by the auxiliary rod (4). The launch gun (1) is loaded with the sub-magnetic ring (2) and the sub-magnetic ring (2) is connected to the mother magnetic ring (3) through the intestinal cavity of the intestinal tract (C). The auxiliary rod (4) assists the mother magnetic ring (3) to connect with the launch gun (1). The distance between the sub-magnetic ring (2) and the mother magnetic ring (3) is continuously shortened by the push knob (101) of the launch gun (1). When the relative distance between the sub-magnetic ring (2) and the mother magnetic ring (3) is closest and they are attracted to each other, the launch gun (1) is separated from the sub-magnetic ring (2) by the excitation mechanism (107) of the launch gun (1). To achieve laparoscopic cholecystoenterostomy, the firing gun (1) comprises a push knob (101), a docking rod (102), an excitation sleeve (103), a loading sleeve (104), a loading slot (105), an excitation mechanism (107), a shell (108), a sensory feedback mechanism (109) and a firing pin (110), wherein the front end of the push knob (101) is connected to the rear end of the docking rod (102) via a spring mechanism, the front end of the docking rod (102) is provided with a hook structure capable of docking with the mother magnetic ring (3), the docking rod (102) is located in the excitation sleeve (103), the excitation sleeve (103) is connected to the excitation mechanism (107), and the sensory feedback mechanism (109) is fixed to the mother magnetic ring (3). The excitation sleeve (103) is fixed on the excitation sleeve (103), the striker (110) is arranged in the shell (108), when the excitation sleeve (103) moves forward, the sensory feedback mechanism (109) can contact the striker (110), the excitation sleeve (103) is located in the loading sleeve (104), the loading sleeve (104) is fixed on the shell (108), the front end of the loading sleeve (104) is detachably connected to the rear end of the loading card slot (105), the sub-magnetic ring (2) is placed in the loading card slot (105), and the auxiliary rod (401) is composed of a supporting mechanism (401), a trigger mechanism (402), a connecting rod (403), a movable joint (404) and a clamping mechanism (40 5), wherein the support mechanism (401) provides support for the trigger mechanism (402) and the clamping mechanism (405), the trigger mechanism (402) is connected to the support mechanism (401) via a first rotating shaft, so that the trigger mechanism (402) can be opened and closed relative to the support mechanism (401) around the first rotating shaft, the rear end of the connecting rod (403) is connected to the trigger mechanism (402), and the front end is connected to the rear end of the movable joint (404) via a second rotating shaft, and the front end of the movable joint (404) is connected to the clamping mechanism (405) via a third rotating shaft, when the trigger mechanism (402) is opened relative to the support mechanism (401) around the first rotating shaft,It will drive the connecting rod (403) to move in the direction of the clamping mechanism (405), and realize the opening of the clamping mechanism (405) through the movable joint (404). Accordingly, when the trigger mechanism (402) is closed relative to the support mechanism (401) around the first rotating shaft, it will drive the connecting rod (403) to move in the direction of the support mechanism (401), and realize the closing of the clamping mechanism (405) through the movable joint (404). The clamping mechanism (405) can clamp the inner drainage tube (303) of the mother magnetic ring (3), thereby fixing the mother magnetic ring (3) at the relative position of the stump of the common bile duct (B), and assisting the mother magnetic ring (3) to dock with the launch gun (1).

2. The magnetic compression anastomosis system according to claim 1, characterized in that: The firing gun (1) further comprises a display needle (111) and a display frame (112); the display needle (111) is fixed on the docking rod (102); and the display frame (112) is arranged in the housing (108) and is used to display the position of the display needle (111).

3. The magnetic compression anastomosis system according to claim 2, characterized in that: The firing gun (1) further comprises a safety bolt (106), and the excitation sleeve (103) is connected to the safety bolt (106).

4. The magnetic compression anastomosis system according to claim 3, characterized in that: The push knob (101), the loading card slot (105), the safety bolt (106), the excitation mechanism (107), the housing (108), the sensory feedback mechanism (109), the display pin (111) and the display frame (112) are made of polymer materials, and the docking rod (102), the excitation sleeve (103), the loading sleeve (104) and the striker (110) are made of non-paramagnetic stainless steel materials.

5. The magnetic compression anastomosis system according to claim 1, characterized in that: The sub-magnetic ring (2) is annular, made of N50 neodymium iron boron material, with a titanium nitride coating on the surface, an inner diameter of 5 mm, and an outer diameter of 8-15 mm.

6. The magnetic compression anastomosis system according to claim 1, characterized in that: The mother magnetic ring (3) is composed of a mother magnetic shell (301), a mother magnet (302) and an inner drainage tube (303); the mother magnet (302) is loaded in the mother magnetic shell (301); the mother magnetic shell (301) is fixedly connected to the inner drainage tube (303); a slot structure is provided in the inner drainage tube (303); the slot structure can be docked with the hook structure at the front end of the docking rod (102).

7. The magnetic compression anastomosis system according to claim 6, characterized in that: The mother magnet shell (301) and the inner drainage tube (303) are both made of non-paramagnetic stainless steel material and have an inner diameter of 3 mm. The outer diameter of the mother magnet shell (301) is 8-15 mm, and the outer diameter of the inner drainage tube (303) is 4 mm. The mother magnet (302) is annular and made of N50 neodymium iron boron material, with a titanium nitride coating on the surface, an inner diameter of 5 mm, and an outer diameter of 7.5-14.5 mm.

8. The magnetic compression anastomosis system according to claim 7, characterized in that: The supporting mechanism (401) and the triggering mechanism (402) are made of polymer materials, and the connecting rod (403), the movable joint (404) and the clamping mechanism (405) are made of non-paramagnetic stainless steel.

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