Intestinal canal anastomosis and anastomotic leakage stent system

Abstract

The utility model provides an intestinal canal anastomosis and anastomotic leakage stent system, which comprises a metal stent, a drainage device and a stent release device, the metal stent is arranged in the stent release device before being released, the stent release device is used for releasing the metal stent, the metal stent is dumbbell-shaped, two ends of the metal stent are raised, and the middle of the metal stent is a groove section; the drainage device comprises an air cushion and a drainage tube, the air cushion wraps the groove section, the whole air cushion is columnar, and air columns are woven into a net shape; a space is formed between the air cushion and the groove section, and the drainage tube is connected to the metal support and communicated with the space. According to the utility model, the air cushion can be filled by injecting gas or water, so that a communicated closed space is formed between the intestinal mucosa and the surface of the metal stent, secretions or blood of the intestinal mucosa, blood vessels and ventage tissues are continuously sucked out through negative pressure, the cleanness of an anastomotic stoma and a ventage is kept, and the healing of the anastomotic stoma and the ventage is promoted.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an intestinal anastomosis and anastomotic leakage stent system. Background Technology

[0002] Gastrointestinal obstruction is quite common in clinical practice. According to the location of the obstruction, it can be divided into esophageal obstruction, gastric obstruction, duodenal obstruction, small bowel obstruction, colonic obstruction, and rectal obstruction. According to the benign or malignant nature of the obstruction, it can be analyzed as benign obstruction and malignant obstruction. According to the time of onset, it can be classified as acute obstruction, subacute obstruction, and chronic obstruction. According to the nature of the obstruction, it can be classified as mechanical obstruction, dynamic obstruction, and strangulated obstruction.

[0003] Removing the cause of obstruction, resecting the affected organ, and performing gastrointestinal anastomosis are routine surgical procedures for treating gastrointestinal obstruction. The use of anastomotic devices has greatly simplified organ anastomosis, but complications such as anastomotic leakage and bleeding are still common. For patients in the acute phase, to reduce the incidence of complications, a gastrointestinal stoma is often performed, allowing the anastomosis and reduction of digestive organs to occur after the organ edema subsides. A gastrointestinal stoma not only requires cumbersome nursing care, affecting daily life and work, but the secondary surgery to complete the anastomosis and reduction of digestive organs further increases the patient's financial burden and physical suffering.

[0004] Silicone-coated fully covered nickel-titanium alloy stents have been widely used in the treatment of bile leaks. By sealing the leak through the stent wall, bile leakage can be stopped, thus promoting healing. These fully covered stents have also been used to treat gastrointestinal perforations and anastomotic leaks. However, under gastrointestinal peristalsis, cylindrical fully covered stents are prone to displacement, losing their ability to seal the leak and limiting their clinical application. To reduce stent displacement, fully covered stents are designed in a dumbbell shape. However, fluid secreted by the gastrointestinal mucosa and the leak tends to accumulate in the central depression of the stent, which not only hinders leak healing but can also lead to further aggravation of the anastomotic leak.

[0005] To facilitate the drainage of secretions accumulated in the recesses of metal stents, VAC Stent Company has applied for a negative pressure suction stent (patent number: WO2024170414A1). This stent is a dumbbell-shaped, fully covered metal stent with a polyurethane foam insert in the recessed area. A vacuum tube connects the foam to the recessed surface of the metal stent. Continuous negative pressure suction through the vacuum tube draws out various secretions, inflammatory mediators, and pus filtered by the polyurethane foam, thereby promoting the healing of the leakage site. The aforementioned negative pressure suction stent still has the following problems: 1. The gastrointestinal mucosa is in close contact with the polyurethane sponge, and the friction between the polyurethane sponge and the gastrointestinal mucosa can lead to gastrointestinal mucosal edema and promote the production of secretions; 2. The polyurethane sponge has a filtering effect on the gastrointestinal mucosa and the fluid secreted from the leak, and lumps of necrotic tissue or purulent coating will be deposited on the surface and in the gaps of the polyurethane sponge, gradually reducing the negative pressure drainage effect; 3. During continuous negative pressure suction, digestive juices in the gastrointestinal tract at both ends of the stent will enter the groove of the metal stent through the gap between the metal stent and the gastrointestinal mucosa, and the damage of digestive juices to the leak tissue is not conducive to the closure of the leak; 4. The outer sheath of the stent release device has a raised protective pad, which is not conducive to the application of the stent in surgical procedures. Utility Model Content

[0006] In response to the aforementioned technical problems, a stent system for intestinal anastomosis and anastomotic leakage is provided.

[0007] The technical means adopted in this utility model are as follows:

[0008] An intestinal anastomosis and anastomotic leakage stent system includes: a metal stent, a drainage device, and a stent release device. The metal stent is placed in the stent release device before release. The stent release device is used to release the metal stent. The metal stent is dumbbell-shaped with raised ends and a grooved section in the middle.

[0009] The drainage device includes an air cushion and a drainage tube. The air cushion is wrapped around the grooved section and is cylindrical in shape, with the air columns woven into a mesh. There is a space between the air cushion and the grooved section, and the drainage tube is connected to a metal bracket and communicates with the space.

[0010] Furthermore, the surface of the air cushion is flat, and the two ends of the air cushion are hemispherical annular air columns, the middle is an interlaced columnar air column, and the intersection of the columnar air columns in the middle forms a hemispherical annular air column along the circumference.

[0011] Furthermore, the air cushion is made of polyethylene, with the central columnar air columns intersecting to form a square or diamond mesh. The columnar air columns may or may not have a first side hole, and the air columns are interconnected.

[0012] Furthermore, the metal support is woven from nickel-titanium alloy wire and is coated with silicone on both the inner and outer sides.

[0013] Furthermore, one side of the drainage tube is fixed to the surface of the groove section and located within the space, while the other side passes through the raised end of the metal bracket and is led out from the inner cavity of the raised end;

[0014] The drainage tube is a single dual-channel tube. The single dual-channel tube has a first air injection channel and a first negative pressure suction channel inside. The side wall of the single dual-channel tube has an opening. The opening is connected to the first air injection channel and a hemispherical annular air column at one end. The head end of the first air injection channel is a blind end.

[0015] The drainage tube fixed to the surface of the groove section has multiple second side holes on its side wall, and the multiple second side holes are connected to the space and the first negative pressure suction channel.

[0016] Furthermore, one side of the drainage tube is fixed to the surface of the groove section and located within the space, while the other side passes through the raised end of the metal bracket and is led out from the inner cavity of the raised end;

[0017] The drainage tube is a single three-channel tube. The single three-channel tube has a second air injection channel, a first water injection channel and a second negative pressure suction channel inside. The side wall of the single three-channel tube has an opening, which is connected to the second air injection channel and a hemispherical annular air column at one end. The head end of the second air injection channel is a blind end.

[0018] The drainage tube fixed to the surface of the groove section has multiple third side holes and multiple fourth side holes on its side wall. The multiple third side holes are connected to the space and the first water injection channel, and the multiple fourth side holes are connected to the space and the second negative pressure suction channel.

[0019] Furthermore, the drainage tube includes an air injection tube and a first negative pressure suction tube, which are arranged on both sides of the metal support.

[0020] The air injection tube passes through a raised section at one end of the metal support and connects to a hemispherical annular air column near the raised section; the interior of the air injection tube has a third air injection channel or a second water injection channel that communicates with the interior of the air cushion.

[0021] One side of the first negative pressure suction tube is fixed to the surface of the groove section and located in the space, and the other side passes through the raised end of the metal bracket and is led out from the inner cavity of the raised end; the interior of the first negative pressure suction tube has a third negative pressure suction channel; the side wall of the first negative pressure suction tube fixed to the surface of the groove section has a plurality of fifth side holes, which are connected to the space and the third negative pressure suction channel.

[0022] Furthermore, the drainage tube includes an injection tube and a second negative pressure suction tube, which are arranged on both sides of the metal support;

[0023] One side of the injection tube is placed within the space, and the other side passes through a raised end of the metal support and exits from the inner cavity of the raised end. The injection tube is a single dual-channel tube, which has a fourth air injection channel and a third water injection channel inside. The side wall of the single dual-channel tube has an opening, which is connected to the fourth air injection channel and a hemispherical annular air column at one end. The head end of the fourth air injection channel is a blind end. The injection tube placed within the space serves as a flushing tube. The interior of the flushing tube is connected to the third water injection channel. The side wall of the flushing tube has multiple sixth side holes, which are connected to the space and the third water injection channel.

[0024] One side of the second negative pressure suction tube is fixed to the surface of the groove section and located in the space, and the other side passes through the protrusion at one end of the metal bracket and is led out from the inner cavity of the protrusion; the interior of the second negative pressure suction tube has a fourth negative pressure suction channel; the side wall of the second negative pressure suction tube fixed to the surface of the groove section has a plurality of seventh side holes, which are connected to the space and the fourth negative pressure suction channel.

[0025] Furthermore, the flushing tube is cylindrical or annular.

[0026] Furthermore, the stent release device includes an outer sheath and a pusher, the pusher being inserted into the interior of the outer sheath, and the metal stent being sleeved on the pusher and located inside the outer sheath before release;

[0027] The head end of the outer sheath may or may not be covered with a silicone protective ring, and the tail end of the outer sheath is provided with a first handle;

[0028] The head end of the pusher has a conical structure, and a limiting structure is provided on the tube wall of the pusher. Before the metal bracket is released, it is sleeved between the conical structure and the limiting structure. The tail end of the pusher is provided with a second handle.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. The intestinal anastomosis and anastomosis leak stent system provided by this utility model has a smooth air cushion surface, which does not irritate the gastrointestinal mucosa and will not increase the extra secretions of the gastrointestinal mucosa.

[0031] 2. The intestinal anastomosis and anastomotic leakage stent system provided by this utility model has an air cushion made of air columns woven into a mesh, with larger gaps between the air columns, which has a better drainage effect on viscous pus and secretions.

[0032] 3. The intestinal anastomosis and anastomotic leakage stent system provided by this utility model forms a relatively closed space between the air cushion and the grooved section of the metal stent, which can efficiently drain the space between the grooved section of the metal stent and the gastrointestinal mucosa.

[0033] 4. The intestinal anastomosis and anastomosis leak stent system provided by this utility model is equipped with a water injection channel or water injection pipe. Water enters the space between the air cushion and the metal support groove through the water outlet pipe or air column hole, and is then led out through the negative pressure suction pipe to form a closed loop. The flowing water can promote the suction of gastrointestinal mucosa or leak secretions, while reducing the blockage rate of the side hole of the suction tube.

[0034] 5. The intestinal anastomosis and anastomotic leakage stent system provided by this utility model has a silicone ring at the head end, which can be inserted through the digestive tract when assembled into a long release device for the treatment of anastomotic leakage or digestive tract perforation. Alternatively, a stent system without a silicone ring at the head end can be inserted through a digestive tract stoma when assembled into a short release device for the protection of the anastomosis during surgery without the need for a gastrointestinal stoma.

[0035] Based on the above reasons, this utility model can be widely promoted in fields such as medicine. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a stent system for intestinal anastomosis and anastomotic leakage according to the present invention, wherein the head end of the stent release device is wrapped with a silicone protective ring.

[0038] Figure 2 This is another structural schematic diagram of the intestinal anastomosis and anastomotic leakage stent system of this utility model, wherein the head end of the stent release device is not wrapped with a silicone protective ring.

[0039] Figure 3 This is a schematic diagram of the structure of the metal support, air cushion, and drainage tube of this utility model.

[0040] Figure 4 for Figure 3 A sectional view.

[0041] Figure 5 This is a schematic diagram of the structure of the metal bracket of this utility model.

[0042] Figure 6 This is a schematic diagram of the structure of the air cushion of this utility model.

[0043] Figure 7 This is a schematic diagram of the drainage tube of this utility model.

[0044] Figure 8This is a schematic diagram of the square mesh air cushion and drainage tube of this utility model.

[0045] Figure 9 This is a schematic diagram of the rhomboid mesh air cushion and drainage tube of this utility model.

[0046] Figure 10 This is a schematic diagram of the air cushion, air injection tube, and negative pressure suction tube of this utility model.

[0047] Figure 11 This is a schematic diagram of the air cushion, the injection tube with an annular flushing tube, and the negative pressure suction tube of this utility model.

[0048] Figure 12 This is a schematic diagram of the air cushion with side holes, the air injection tube, and the negative pressure suction tube of this utility model.

[0049] Figure 13 This is a schematic diagram of the air cushion, the injection tube with a cylindrical flushing tube, and the negative pressure suction tube of this utility model.

[0050] In the diagram: 1. Metal support; 21. Outer sheath; 22. Pusher; 23. Silicone protective ring; 3. Air cushion; 31. Hemispherical annular air column; 32. First side hole; 4. Drainage tube; 41. First air injection channel; 42. First negative pressure suction channel; 43. Second side hole; 44. Air injection tube; 45. First negative pressure suction tube; 46. Fifth side hole; 47. Fourth air injection channel; 48. Third water injection channel; 49. Flushing tube; 410. Sixth side hole; 411. Second negative pressure suction tube; 412. Seventh side hole. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] This utility model provides an intestinal anastomosis and anastomotic leakage stent system, including: a metal stent 1, a drainage device and a stent release device. Before release, the metal stent 1 is placed in the stent release device, which is used to release the metal stent 1. The metal stent 1 is dumbbell-shaped with raised ends and a grooved section in the middle. The drainage device includes a drainage tube 4 and an air cushion 3. The air cushion 3 is wrapped around the grooved section and is cylindrical in shape, made of air columns woven into a mesh. There is a space between the air cushion 3 and the grooved section. The drainage tube 4 is connected to the metal stent 1 and communicates with the space.

[0053] Preferably, the surface of the air cushion 3 is flat, and the two ends of the air cushion 3 are hemispherical annular air columns 31, while the middle consists of intersecting cylindrical air columns. The intersection of the cylindrical air columns in the middle forms a hemispherical annular air column 31 along the circumference. The air cushion 3 is made of polyethylene, and the intersecting cylindrical air columns in the middle form a square mesh or a diamond mesh. The cylindrical air columns may or may not have a first side hole 32, and the air columns are interconnected.

[0054] Preferably, the metal support 1 is woven from nickel-titanium alloy wire and is coated with silicone on both the inner and outer sides.

[0055] Preferably, one side of the drainage tube 4 is fixed to the surface of the groove section and located in the space, and the other side passes through the raised end of the metal bracket 1 and is led out from the inner cavity of the raised end; the drainage tube 4 is a single double-channel tube, and the interior of the single double-channel tube is provided with a first air injection channel 41 and a first negative pressure suction channel 42. The side wall of the single double-channel tube is provided with an opening, which is connected to the first air injection channel 41 and a hemispherical annular air column 31 at one end. The head end of the first air injection channel 41 is a blind end; the side wall of the drainage tube 4 fixed to the surface of the groove section has a plurality of second side holes 43, which are connected to the space and the first negative pressure suction channel 42.

[0056] Preferably, one side of the drainage tube 4 is fixed to the surface of the groove section and located within the space, while the other side passes through the raised end of the metal bracket 1 and is led out from the inner cavity of the raised end. The drainage tube 4 is a single three-channel tube, which has a second air injection channel, a first water injection channel, and a second negative pressure suction channel inside. The side wall of the single three-channel tube has an opening that communicates with the second air injection channel and a hemispherical annular air column 31 at one end. The head end of the second air injection channel is a blind end. The side wall of the drainage tube 4 fixed to the surface of the groove section has multiple third side holes and multiple fourth side holes. The multiple third side holes communicate with the space and the first water injection channel, and the multiple fourth side holes communicate with the space and the second negative pressure suction channel.

[0057] Preferably, the drainage tube 4 includes an air injection tube 44 and a first negative pressure suction tube 45, which are arranged on both sides of the metal support 1. The air injection tube 44 passes through a raised section at one end of the metal support 1 and is connected to a hemispherical annular air column 31 near the raised section. The interior of the air injection tube 44 has a third air injection channel or a second water injection channel that communicates with the interior of the air cushion 3. One side of the first negative pressure suction tube 45 is fixed to the surface of the groove section and located in the space, while the other side passes through the raised section at one end of the metal support 1 and is led out from the inner cavity of the raised section. The interior of the first negative pressure suction tube 45 has a third negative pressure suction channel. The sidewall of the first negative pressure suction tube 45 fixed to the surface of the groove section has a plurality of fifth side holes 46, which communicate with the space and the third negative pressure suction channel.

[0058] Preferably, the drainage tube 4 includes an injection tube and a second negative pressure suction tube 411, which are arranged on both sides of the metal support 1. One side of the injection tube is placed in the space, and the other side passes through a raised end of the metal support 1 and is led out from the inner cavity of the raised end. The injection tube is a single double-channel tube, which has a fourth air injection channel 47 and a third water injection channel 48 inside. The side wall of the single double-channel tube has an opening that communicates with the fourth air injection channel 47 and a hemispherical annular air column 31 at one end. The head end of the fourth air injection channel 47 is a blind end. The injection tube placed in the space serves as a flushing tube 49. The flushing pipe 49 is connected to the third water injection channel 48. The side wall of the flushing pipe 49 has a plurality of sixth side holes 410, which are connected to the space and the third water injection channel 48. One side of the second negative pressure suction pipe 411 is fixed to the surface of the groove section and located in the space. The other side passes through the raised end of the metal bracket 1 and is led out from the inner cavity of the raised end. The interior of the second negative pressure suction pipe 411 has a fourth negative pressure suction channel. The side wall of the second negative pressure suction pipe 411 fixed to the surface of the groove section has a plurality of seventh side holes 412, which are connected to the space and the fourth negative pressure suction channel.

[0059] Preferably, the flushing tube 49 is cylindrical or annular (spiral).

[0060] Preferably, the stent release device includes an outer sheath 21 and a pusher 22. The pusher 22 is inserted into the interior of the outer sheath 21. Before release, the metal stent 1 is fitted onto the pusher 22 and located inside the outer sheath 21. The head end of the outer sheath 21 may or may not be covered by a silicone protective ring 23, and the tail end of the outer sheath 21 is provided with a first handle. The head end of the pusher 22 has a conical structure, and the tube wall of the pusher 22 is provided with a limiting structure. Before release, the metal stent 1 is fitted between the conical structure and the limiting structure, and the tail end of the pusher 22 is provided with a second handle.

[0061] This invention inflates an air cushion by injecting gas or water, creating a closed space between the intestinal mucosa and the surface of the metal stent. Negative pressure continuously draws out secretions or blood from the intestinal mucosa, blood vessels, and leak tissue, keeping the anastomosis and leak clean and promoting their healing. Continuous water injection into the closed space between the intestinal mucosa and the metal stent further flushes the anastomosis mucosa and leak, promoting the drainage of inflammatory mediators and reducing the blockage rate of the negative pressure drainage tube, thereby accelerating the healing of the anastomosis and leak.

[0062] Use of this utility model:

[0063] 1. Treatment of gastrointestinal perforation or anastomotic leakage

[0064] If a gastroscopy or colonoscopy reveals a perforation in the digestive tract or anastomotic leakage, a guidewire is inserted and advanced into the distal digestive tract. Under guidewire guidance, this stent system is placed. The stent pusher of the stent release device is fixed, and the outer sheath is pulled back. The metal stent is gradually released from the outer sheath until it is completely released. The drainage tube is fixed, and the stent release device is pulled back until the drainage tube separates from the stent release device.

[0065] 1.1 Single dual-channel drainage tube

[0066] The dual-channel drainage tube connects an air injection connector and a negative pressure suction connector. Air or liquid is injected through the air injection connector to fill the air cushion surrounding the groove of the metal support, forming a ring-shaped mesh air cushion. The external negative pressure suction tube is connected through the negative pressure suction connector to intermittently or continuously suction out the secretions between the air cushion and the grooved metal support.

[0067] 1.2 Single-channel dual-channel flushing drainage tube

[0068] The dual-channel drainage tube connects to the air injection connector and the negative pressure suction connector. Air or water is injected through the air injection connector to fill the air cushion surrounding the groove of the metal support, forming a ring-shaped mesh air cushion. The air or water in the air column enters the sealed space between the air cushion and the groove of the metal support through the side hole on the surface of the air column near the groove of the metal support. The negative pressure suction connector connects to the external negative pressure suction tube to intermittently or continuously suck out the air, water and secretions between the air cushion and the grooved metal support.

[0069] 1.3 Single three-channel flushing drainage tube

[0070] The three-channel drainage tube connects to an air injection connector, a water injection connector, and a negative pressure suction connector. Air or water is injected through the air injection connector to inflate the air cushion surrounding the groove of the metal support, forming a ring-shaped mesh air cushion. Water is injected through the water injection connector, flowing into the water outlet pipe placed on the surface of the groove of the metal support, and entering the sealed space between the air cushion and the groove of the metal support through its side hole. The negative pressure suction connector connects to the negative pressure suction tube to intermittently or continuously suck out the water and secretions between the air cushion and the groove of the metal support.

[0071] 1.4 Single-channel + dual-channel drainage tube

[0072] The dual-channel drainage tube connector allows for the injection of air or liquid through the air injection connector, inflating the air cushion surrounding the metal support groove to form a ring-shaped mesh air cushion. Water is injected through the water injection connector, flowing into the outlet pipe located on the surface of the metal support groove and entering the sealed space between the air cushion and the metal support groove through its side holes. The single-channel tube is a negative pressure suction tube; connected to a negative pressure connector, it can intermittently or continuously draw out water and secretions between the air cushion and the grooved metal support.

[0073] 2. Acute phase intestinal anastomosis

[0074] For patients with acute intestinal obstruction, after resection of necrotic and stenotic intestinal segments, enterostomy is unnecessary; the edematous intestinal segments are directly anastomosed end-to-end. The intestinal wall is incised away from the anastomosis, and the stent system is inserted through the incision, with the anastomosis located in the middle of the stent. The intestinal segments at both ends of the anastomosis are squeezed towards the middle of the stent, and the stent pusher of the stent release device is fixed, while the outer sheath is pulled back. The metal stent is gradually released from the outer sheath until it is completely released. The drainage tube is fixed, and the stent release device is pulled back until it separates from the stent release device. At this point, the intestinal wall on the groove of the metal stent is folded, and the anastomosis is tension-free. Absorbable sutures are used to fix the intestinal wall to the raised tube walls at both ends of the metal stent to prevent stent displacement. The entire intestinal wall incision and the depressor muscle layer are sutured with absorbable sutures and fixed to the drainage tube, which runs parallel to the intestinal wall and is wrapped with seromuscular sutures. Finally, the drainage tube is brought out through a puncture in the abdominal wall and sutured to the abdominal wall to fix it in place. Inflate the air cushion with air or water, and use negative pressure to intermittently or continuously draw out secretions between the air cushion and the recessed metal support. Alternatively, inject air or water into the sealed gap between the air cushion and the recessed metal support to continuously dilute the secretions and promote their drainage.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A system for intestinal anastomosis and anastomotic leakage stenting, characterized in that, include: Metal stent (1), drainage device and stent release device, the metal stent (1) is placed in the stent release device before release, the stent release device is used to release the metal stent (1), the metal stent (1) is dumbbell-shaped, with raised ends and a groove in the middle; The drainage device includes an air cushion (3) and a drainage tube (4). The air cushion (3) is wrapped around the grooved section and is columnar in shape, woven into a mesh by air columns. There is a space between the air cushion (3) and the grooved section. The drainage tube (4) is connected to the metal bracket (1) and communicates with the space.

2. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, characterized in that, The surface of the air cushion (3) is flat. The two ends of the air cushion (3) are hemispherical ring-shaped air columns (31), and the middle is a columnar air column that is intersected with each other. The part where the columnar air columns intersect is a hemispherical ring-shaped air column (31) along the circumference.

3. The intestinal anastomosis and anastomotic leakage stent system according to claim 2, characterized in that, The air cushion (3) is made of polyethylene, with the middle columnar air columns intersecting to form a square mesh or a diamond mesh. The columnar air columns may or may not have a first side hole (32), and the air columns are interconnected.

4. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, characterized in that, The metal support (1) is woven from nickel-titanium alloy wire and is wrapped with silicone coating on both the inner and outer sides.

5. The intestinal anastomosis and anastomotic leakage stent system according to claim 3, characterized in that, One side of the drainage tube (4) is fixed to the surface of the groove section and located in the space, and the other side passes through the raised end of the metal bracket (1) and is led out from the inner cavity of the raised end; The drainage tube (4) is a single double-channel tube. The single double-channel tube has a first air injection channel (41) and a first negative pressure suction channel (42) inside. The side wall of the single double-channel tube has an opening. The opening is connected to the first air injection channel (41) and a hemispherical annular air column (31) at one end. The head end of the first air injection channel (41) is a blind end. The drainage tube (4) fixed on the surface of the groove section has multiple second side holes (43) on its side wall, which are connected to the space and the first negative pressure suction channel (42).

6. The intestinal anastomosis and anastomotic leakage stent system according to claim 3, characterized in that, One side of the drainage tube (4) is fixed to the surface of the groove section and located in the space, and the other side passes through the raised end of the metal bracket (1) and is led out from the inner cavity of the raised end; The drainage tube (4) is a single three-channel tube. The single three-channel tube has a second air injection channel, a first water injection channel and a second negative pressure suction channel inside. The side wall of the single three-channel tube has an opening. The opening is connected to the second air injection channel and a hemispherical annular air column (31) at one end. The head end of the second air injection channel is a blind end. The drainage pipe (4) fixed on the surface of the groove section has multiple third side holes and multiple fourth side holes on its side wall. The multiple third side holes are connected to the space and the first water injection channel, and the multiple fourth side holes are connected to the space and the second negative pressure suction channel.

7. The intestinal anastomosis and anastomotic leakage stent system according to claim 3, characterized in that, The drainage tube (4) includes an air injection tube (44) and a first negative pressure suction tube (45), which are arranged on both sides of the metal support (1). The air injection tube (44) passes through the raised end of the metal bracket (1) and is connected to the hemispherical annular air column (31) near the raised end; the interior of the air injection tube (44) has a third air injection channel or a second water injection channel that communicates with the interior of the air cushion (3); One side of the first negative pressure suction tube (45) is fixed to the surface of the groove section and located in the space, and the other side passes through the protrusion at one end of the metal bracket (1) and is led out from the inner cavity of the protrusion; the interior of the first negative pressure suction tube (45) has a third negative pressure suction channel; the side wall of the first negative pressure suction tube (45) fixed to the surface of the groove section has a plurality of fifth side holes (46), and the plurality of fifth side holes (46) are connected to the space and the third negative pressure suction channel.

8. The intestinal anastomosis and anastomotic leakage stent system according to claim 3, characterized in that, The drainage tube (4) includes an injection tube and a second negative pressure suction tube (411), which are arranged on both sides of the metal support (1). One side of the injection tube is placed in the space, and the other side passes through the raised end of the metal support (1) and is led out from the inner cavity of the raised end; the injection tube is a single double-channel tube, and the inside of the single double-channel tube is provided with a fourth air injection channel (47) and a third water injection channel (48). The side wall of the single double-channel tube is provided with an opening, which is connected to the fourth air injection channel (47) and a hemispherical annular air column (31) at one end. The head end of the fourth air injection channel (47) is a blind end; the injection tube placed in the space is used as a flushing tube (49). The inside of the flushing tube (49) is connected to the third water injection channel (48). The side wall of the flushing tube (49) is provided with a plurality of sixth side holes (410), which are connected to the space and the third water injection channel (48); One side of the second negative pressure suction tube (411) is fixed to the surface of the groove section and located in the space, and the other side passes through the protrusion at one end of the metal bracket (1) and is led out from the inner cavity of the protrusion; the interior of the second negative pressure suction tube (411) has a fourth negative pressure suction channel; the side wall of the second negative pressure suction tube (411) fixed to the surface of the groove section has a plurality of seventh side holes (412), which are connected to the space and the fourth negative pressure suction channel.

9. The intestinal anastomosis and anastomotic leakage stent system according to claim 8, characterized in that, The flushing tube (49) is cylindrical or annular.

10. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, characterized in that, The stent release device includes an outer sheath (21) and a pusher (22). The pusher (22) is inserted into the interior of the outer sheath (21). Before the metal stent (1) is released, it is sleeved on the pusher (22) and located inside the outer sheath (21). The head end of the outer sheath (21) may or may not be covered by a silicone protective ring (23), and the tail end of the outer sheath (21) is provided with a first handle; The head end of the pusher (22) is tapered, and a limiting structure is provided on the tube wall of the pusher (22). Before the metal bracket (1) is released, it is sleeved between the tapered structure and the limiting structure. The tail end of the pusher (22) is provided with a second handle.

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