Metal support for intestinal canal anastomosis and anastomotic leakage

Abstract

The invention provides an intestinal canal anastomosis and anastomotic leakage metal stent, and relates to the technical field of medical instruments, the intestinal canal anastomosis and anastomotic leakage metal stent comprises a metal stent, a drainage tube and a stent release device, the metal stent is arranged in the stent release device before being released, and the metal stent is dumbbell-shaped after being released and comprises a first upheaval section, a second upheaval section and a groove section, the groove section is a double-layer metal net and comprises an inner-layer metal net and an outer-layer metal net, a space is formed between the inner-layer metal net and the outer-layer metal net, the inner face and the outer face of the metal support are both wrapped with silica gel coatings, a plurality of round holes communicated with the space are formed in the silica gel coating of the outer-layer metal net, the drainage tube is connected with the groove section, and the interior of the drainage tube is communicated with the space. After being released, the metal stent can block a digestive tract ventage or support liquid secreted by an anastomotic stoma, intestinal mucosa, blood vessels and ventage tissue, the liquid can enter the space between the two layers of metal stent nets through the round holes in the silica gel coating of the outer-layer metal net and is sucked out by negative pressure, cleanliness of the anastomotic stoma and the ventage can be kept, and healing of the anastomotic stoma and the ventage is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to an intestinal anastomosis and anastomotic leakage metal stent. Background Art

[0002] Digestive tract obstruction is relatively common in the department of gastroenterology and gastrointestinal surgery. According to the obstruction site, it can be divided into esophageal obstruction, gastric obstruction, duodenal obstruction, small intestine obstruction, colon obstruction and rectal obstruction; according to the benign and malignant nature of the obstructive disease, it can be analyzed as benign obstruction and malignant obstruction; according to the time of onset of the obstruction, it can be acute obstruction, subacute obstruction and chronic obstruction; according to the nature of the obstruction, it can be divided into mechanical obstruction, dynamic obstruction and strangulating obstruction.

[0003] Removing the cause of obstruction, excising the diseased organ and gastrointestinal anastomosis are the conventional surgical procedures for treating digestive tract obstruction. The application of staplers has made the anastomosis between organs very simple, but complications such as anastomotic leakage and bleeding are still common. For acute-phase patients, in order to reduce the incidence of complications, gastrointestinal fistula is mostly adopted, and then gastrointestinal anastomosis and reduction are performed after the organ edema subsides. Gastrointestinal fistula not only has cumbersome care, affects daily life and work, but also the secondary surgery to complete gastrointestinal anastomosis and reduction will increase the patient's economic burden and physical pain again.

[0004] Silicone-coated fully covered nitinol metal stents have been widely used in the treatment of bile leakage. By blocking the leakage orifice through the tube wall of the fully covered metal stent, the leakage of bile can be terminated, thereby promoting the healing of the leakage orifice. The above-mentioned fully covered metal stents have also been applied to the treatment of gastrointestinal perforation and anastomotic leakage. However, under gastrointestinal peristalsis, the cylindrical fully covered metal stent is prone to displacement and loses the function of blocking the leakage orifice, thereby limiting its clinical application. In order to reduce the displacement rate of the stent, the fully covered metal stent is designed in a dumbbell shape. However, the fluid secreted by the gastrointestinal mucosa and the leakage orifice is easily accumulated in the middle depression of the fully covered metal stent, which is not only not conducive to the healing of the leakage orifice, but also can lead to the further deterioration of anastomotic leakage.

[0005] To facilitate the drainage of secretions accumulated in the grooves of the metal stent, VAC Stent Company applied for a negative pressure suction stent (Patent No.: WO2024170414A1). This stent is a dumbbell-shaped fully covered metal stent, with a polyurethane sponge sleeved in the middle of the depression of the stent, and a vacuum tube between the sponge and the concave surface of the metal stent. Through the continuous negative pressure suction of various secretions, inflammatory mediators, and pus filtered by the polyurethane sponge through the vacuum tube, it can promote the healing of the leakage opening. However, the above negative pressure suction stent still has the following problems: 1. The gastrointestinal mucosa adheres closely to the polyurethane sponge, and the friction between the polyurethane sponge and the gastrointestinal mucosa can cause edema of the gastrointestinal mucosa and promote the production of secretions; 2. The polyurethane sponge has a filtering effect on the fluids secreted by the gastrointestinal mucosa and the leakage opening, and massive necrotic tissues or purulent moss will deposit on the surface and gaps of the polyurethane sponge, gradually reducing the negative pressure drainage effect; 3. During the continuous negative pressure suction process, digestive juices in the gastrointestinal tract at both ends of the stent will enter the grooves of the metal stent through the gaps between the metal stent and the gastrointestinal mucosa, and the damage of the digestive juices to the leakage opening tissue is not conducive to the closure of the leakage opening; 4. The outer sheath of the stent release device is provided with a raised protective pad, which is not conducive to the application of this stent in surgical operations. Summary of the Invention

[0006] In view of the above-mentioned technical problems, an intestinal anastomosis and anastomotic leakage metal stent is provided.

[0007] The technical means adopted by the present invention are as follows:

[0008] An intestinal anastomosis and anastomotic leakage metal stent, comprising: a metal stent, a drainage tube, and a stent release device. Before being released, the metal stent is arranged in the stent release device. After being released, the metal stent is in a dumbbell shape, including a first raised section and a second raised section arranged at both ends and a groove section arranged in the middle. The groove section is arranged between the first raised section and the second raised section;

[0009] The groove section is a double-layer metal mesh, including an inner metal mesh and an outer metal mesh, and there is a space between the inner metal mesh and the outer metal mesh;

[0010] Both the inner and outer surfaces of the metal stent are wrapped with a silicone coating, and a plurality of circular holes are provided on the silicone coating at the outer metal mesh, and the plurality of circular holes are communicated with the space;

[0011] The drainage tube is connected to the groove section, and the inside of the drainage tube is communicated with the space.

[0012] Furthermore, the metal stent is woven from nitinol alloy wires, and the plurality of circular holes are distributed on the silicone coating between the meshes of the outer metal mesh.

[0013] Further, one side of the drainage tube is located between the inner metal mesh and the outer metal mesh, within the space and closely attached to the inner metal mesh, and the other side of the drainage tube is led out from the inner cavity of the second raised section, wherein the drainage tube within the space is arranged along the length direction of the entire groove section.

[0014] Further, the drainage tube is single or double.

[0015] Further, the single drainage tube is a suction drainage tube, and the leading end of the suction drainage tube is connected to an external negative pressure device through a negative pressure suction joint. A plurality of first side holes are provided on the tube wall of the suction drainage tube, and the plurality of first side holes are used to connect the suction drainage tube and the space.

[0016] Further, the single drainage tube is a double-channel tube, with a suction channel and a water injection channel inside. A plurality of second side holes and a plurality of third side holes are provided on the tube wall of the double-channel tube. The plurality of second side holes are connected to the suction channel and the space, and the plurality of third side holes are connected to the water injection channel and the space; the leading end of the double-channel tube is connected with a negative pressure suction joint and an air injection joint. The negative pressure suction joint is connected to the suction channel and is connected to an external negative pressure device, and the air injection joint is connected to the water injection channel and is connected to an external water injection pipe.

[0017] Further, the drainage tube is double. The double drainage tubes include a suction tube and a flushing tube. Both the suction tube and the flushing tube are single-channel tubes. The suction tube is connected to an external negative pressure device through a negative pressure suction joint, and the flushing tube is connected to an external water injection pipe through an air injection joint. The flushing tube is linear or annular. A plurality of fourth side holes are provided on the tube wall of the suction tube, and the plurality of fourth side holes are used to connect the suction tube and the space. A plurality of fifth side holes are provided on the tube wall of the flushing tube, and the plurality of fifth side holes are used to connect the flushing tube and the space.

[0018] Further, the suction tube and the flushing tube are symmetrically arranged with the center of the metal stent as the center.

[0019] Further, the stent releasing device includes an outer sheath tube and a pusher. The pusher is inserted into the inner part of the outer sheath tube. Before the metal stent is released, it is sleeved on the pusher and is located inside the outer sheath tube.

[0020] Further, the head end of the outer sheath tube is wrapped or not wrapped with a silica gel protection ring, and the tail of the outer sheath tube is provided with a first handle;

[0021] The head end of the pusher is in a conical structure, and a limiting structure is provided on the tube wall of the pusher. Before the metal stent is released, it is sleeved between the conical structure and the limiting structure. The tail of the pusher is provided with a second handle.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The metal stent for intestinal anastomosis and anastomotic leakage provided by the present invention adopts a double-layer metal mesh and is provided with a silica gel membrane, which can reduce the irritation of the digestive tract mucosa and reduce the production of secretions.

[0024] 2. In the metal stent for intestinal anastomosis and anastomotic leakage provided by the present invention, the silica gel membrane in the middle of the outer metal mesh is provided with circular holes, and the liquid secreted by the gastrointestinal mucosa and the leakage opening can enter the space between the two metal meshes through the circular holes and be sucked out by the negative pressure drainage tube, which can promote the healing of the anastomotic opening and the leakage opening.

[0025] 3. In the metal stent for intestinal anastomosis and anastomotic leakage provided by the present invention, a relatively sealed space is formed between the two metal meshes. The outer mesh holes are larger, which can promote the discharge of large pieces of pus and necrotic tissue, and the drainage efficiency is higher.

[0026] 4. The metal stent for intestinal anastomosis and anastomotic leakage provided by the present invention is provided with a water / air injection channel or a separate drainage tube. Water or air enters the space between the two metal meshes and is then led out through the negative pressure suction tube to form a closed loop. The flowing water or air can continuously wash the gastrointestinal mucosa and the leakage opening, promote the discharge of the secretion of the gastrointestinal mucosa or the leakage opening, and at the same time reduce the blockage rate of the side holes of the suction tube.

[0027] 5. The metal stent for intestinal anastomosis and anastomotic leakage provided by the present invention is provided with a silica gel ring at the head end. When assembled into a long release device, it can be placed into the digestive tract through the digestive tract and is used for the treatment of anastomotic leakage or digestive tract perforation. When there is no silica gel ring at the head end and it is assembled into a short release device, it can be placed into the digestive tract through the digestive tract fistula opening and is used to protect the anastomotic opening during surgery without the need for gastrointestinal fistula.

[0028] Based on the above reasons, the present invention can be widely promoted in the medical field and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 This is a schematic structural diagram of the metal stent for intestinal anastomosis and anastomotic leakage of the present invention, in which the head end of the stent release device is wrapped with a silica gel protection ring.

[0031] Figure 2 This is another schematic structural diagram of the metal stent for intestinal anastomosis and anastomotic leakage of the present invention, in which the head end of the stent release device is not wrapped with a silica gel protection ring.

[0032] Figure 3This is a schematic structural view of the metal stent of the present invention connecting a single suction drainage tube.

[0033] Figure 4 This is a schematic structural view of the metal stent of the present invention connecting a single double-channel tube.

[0034] Figure 5 This is a schematic structural view of the metal stent of the present invention connecting two drainage tubes.

[0035] Figure 6 is Figure 3 a cross-sectional view of

[0036] Figure 7 is Figure 4 a cross-sectional view of

[0037] Figure 8 is Figure 5 a cross-sectional view of

[0038] Figure 9 This is a cross-sectional view of the metal stent of the present invention.

[0039] Figure 10 This is a cross-sectional view of the single suction drainage tube of the present invention.

[0040] Figure 11 This is a cross-sectional view of the single double-channel tube of the present invention.

[0041] Figure 12 This is a schematic view of the outer metal mesh with circular holes of the present invention.

[0042] Figure 13 This is a schematic view of the inner metal mesh of the present invention.

[0043] In the figure: 1. Metal stent; 11. First raised section; 121. Inner metal mesh; 122. Outer metal mesh; 123. Circular hole; 13. Second raised section; 21. Outer sheath tube; 22. Pusher; 23. Silicone protection ring; 3. Drainage tube. Specific embodiments

[0044] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] To make the objectives, 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 and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual scale. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0048] In the description of the present invention, it should be understood that the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. usually indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. The orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0049] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0051] The present invention provides an intestinal anastomosis and anastomotic leakage metal stent, comprising: a metal stent, a drainage tube 3, and a stent releasing device. The metal stent is disposed in the stent releasing device before being released. After the metal stent is released, it is in a dumbbell shape with raised ends and a double-layer metal mesh in the middle. The metal stent includes a first raised section 11 and a second raised section 13 disposed at both ends and a groove section disposed in the middle. The groove section is disposed between the first raised section 11 and the second raised section 13; the groove section is a double-layer metal mesh, including an inner layer metal mesh 121 and an outer layer metal mesh 122, and there is a space between the inner layer metal mesh 121 and the outer layer metal mesh 122; both the inner and outer surfaces of the metal stent are wrapped by a silica gel coating, and a plurality of circular holes 123 are provided on the silica gel coating in the middle of the outer layer metal mesh 122 at the groove section, and the plurality of circular holes 123 communicate with the space; the drainage tube 3 is connected to the groove section, and the inside of the drainage tube 3 communicates with the space.

[0052] Preferably, the metal stent is woven from nitinol wires, and the plurality of circular holes 123 are distributed on the silica gel coating between the meshes of the outer layer metal mesh 122.

[0053] Preferably, one side of the drainage tube 3 passes through and is located between the inner layer metal mesh 121 and the outer layer metal mesh 122 of the groove section of the metal stent 1, is located in the space and is closely attached to the inner layer metal mesh 121, and the other side of the drainage tube 3 is led out from the inner cavity at the head end of the second raised section 13, wherein the drainage tube 3 located in the space is arranged along the entire length direction of the groove section, that is, the length of the drainage tube 3 located in the space is the same as the length of the groove section.

[0054] Preferably, the drainage tube 3 is single or double.

[0055] Preferably, the single drainage tube 3 is a suction drainage tube. The leading end of the suction drainage tube is connected to an external negative pressure device through a negative pressure suction joint. A plurality of first side holes are provided on the tube wall of the suction drainage tube, and the plurality of first side holes are used to communicate the suction drainage tube with the space.

[0056] Preferably, the single drainage tube 3 is a double-channel tube with a suction channel and a water injection channel inside. A plurality of second side holes and a plurality of third side holes are provided on the tube wall of the double-channel tube. The plurality of second side holes are used to communicate the suction channel with the space, and the plurality of third side holes are used to communicate the water injection channel with the space; the leading end of the double-channel tube is connected with a negative pressure suction joint and an air injection joint. The negative pressure suction joint is communicated with the suction channel and connected to an external negative pressure device, and the air injection joint is communicated with the water injection channel and connected to an external water injection pipe.

[0057] Preferably, the drainage tube 3 is double. The double drainage tubes 3 include a suction tube and a flushing tube. Both the suction tube and the flushing tube are single-channel tubes. The suction tube is connected to an external negative pressure device through a negative pressure suction joint, and the flushing tube is connected to an external water injection pipe through an air injection joint. The flushing tube is linear or annular (i.e., spiral). A plurality of fourth side holes are provided on the tube wall of the suction tube, and the plurality of fourth side holes are used to communicate the suction tube with the space. A plurality of fifth side holes are provided on the tube wall of the flushing tube, and the plurality of fifth side holes are used to communicate the flushing tube with the space.

[0058] Preferably, the suction tube and the flushing tube are symmetrically arranged with respect to the center of the metal stent.

[0059] Preferably, the stent releasing 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 is released, it is sleeved on the pusher 22 and is located inside the outer sheath 21.

[0060] Preferably, the head end of the outer sheath 21 is wrapped or not wrapped with a silica gel protection ring 23. A first handle is provided at the tail of the outer sheath 21; the head end of the pusher 22 is in a conical structure. A metal stent limiting structure (which can adopt the existing limiting structure) is provided on the tube wall of the pusher 22. Before the metal stent 1 is released, it is sleeved between the conical structure and the limiting structure. A second handle is provided at the tail of the pusher 22.

[0061] After the metal stent of the present invention is released, it can block the digestive tract leakage or support the anastomotic stoma. The liquid secreted by the intestinal mucosa, blood vessels, and leakage tissue can enter the space between the two layers of metal meshes of the metal stent through the circular holes in the silica gel coating on the outer metal mesh of the metal stent and be sucked out by negative pressure, which can keep the anastomotic stoma and leakage clean and promote the healing of the anastomotic stoma and leakage. By continuously injecting water or air into the closed space between the two layers of metal meshes of the metal stent to continuously wash the anastomotic stoma mucosa and leakage, it can not only promote the discharge of inflammatory mediators secreted by the anastomotic stoma and leakage, but also reduce the blockage rate of the negative pressure drainage tube, thereby accelerating the healing of the anastomotic stoma and leakage.

[0062] Use of the present invention:

[0063] 1. Treatment of digestive tract perforation or anastomotic leakage

[0064] During gastroscopy examination, when digestive tract perforation or anastomotic leakage is found, a guide wire is inserted and advanced into the distal digestive tract. Under the guidance of the guide wire, this metal stent is inserted. Fix the stent pusher (push tube) of the stent release device and retract the outer sheath tube. The metal stent is gradually released from the outer sheath tube until the metal stent is completely released. Fix the drainage tube and retract the stent release device until the drainage tube is separated from the stent release device.

[0065] 1.1 Single suction drainage tube

[0066] The leading end of the suction drainage tube is connected to an external negative pressure device (existing device) through a negative pressure suction joint, and the secretions entering the space between the two layers of metal meshes can be intermittently or continuously sucked out.

[0067] 1.2 Single double-channel irrigation drainage tube

[0068] The leading end of the double-channel drainage tube is connected with an air injection joint and a negative pressure suction joint. Air or water is injected through the air injection joint, and the air or water enters the cavity between the two layers of metal meshes; through the negative pressure suction joint, it is connected to a negative pressure suction tube, and the air, water, and secretions between the two layers of metal meshes are intermittently or continuously sucked out.

[0069] 1.3 Double single-channel irrigation drainage tubes

[0070] One drainage tube injects air or water through an air injection joint, and the air or water flows into the cavity between the two layers of metal meshes through the side holes of the drainage tube; through the negative pressure suction joint, it is connected to a negative pressure suction tube, and the water and secretions in the cavity between the two layers of metal meshes are intermittently or continuously sucked out.

[0071] 2. Acute intestinal anastomosis

[0072] For patients with acute intestinal obstruction, after resection of necrotic and stenotic intestinal segments, enterostomy is not required, and end-to-end anastomosis is directly performed on the edematous intestinal segments. The intestinal wall is incised away from the anastomotic site, and this metal stent is inserted through the incision. The anastomotic site is located at the groove segment in the middle of the metal stent. After squeezing the intestinal segments at both ends of the anastomotic site towards the middle of the metal stent, the stent pusher of the stent release device is fixed and the outer sheath tube is pulled back, and the metal stent is gradually released from the outer sheath tube until the metal stent is completely released. The drainage tube is fixed and the stent release device is pulled back until the drainage tube is separated from the stent release device. At this time, the intestinal wall on the groove segment of the metal stent is in a folded state, and there is no tension at the anastomotic site. The intestinal wall is fixed to the raised tube walls at both ends of the metal stent with absorbable sutures to prevent stent displacement. The absorbable sutures are fixed to the drainage tube after suturing the entire intestinal wall incision and the descending muscular layer. The drainage tube runs parallel to the intestinal wall, and the seromuscular layer is sutured to wrap the drainage tube. Finally, the drainage tube is led out through a puncture hole in the abdominal wall, and the drainage tube is sutured and fixed on the abdominal wall. Through negative pressure suction, the secretions in the gap between the two layers of metal meshes are intermittently or continuously sucked out. Air or water can also be continuously injected into the gap between the two layers of metal meshes to continuously dilute the secretions and promote the discharge of the secretions.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intestinal anastomosis and anastomotic leakage metal stent, characterized in that, Comprising: A metal stent (1), a drainage tube (3) and a stent releasing device. Before being released, the metal stent (1) is arranged inside the stent releasing device. After being released, the metal stent (1) is in a dumbbell shape, including a first raised section (11) and a second raised section (13) provided at both ends and a groove section provided in the middle. The groove section is arranged between the first raised section (11) and the second raised section (13); The groove section is a double-layer metal mesh, including an inner layer metal mesh (121) and an outer layer metal mesh (122), and there is a space between the inner layer metal mesh (121) and the outer layer metal mesh (122); Both the inner and outer surfaces of the metal stent (1) are coated with a silica gel coating. A plurality of circular holes (123) are provided on the silica gel coating at the outer layer metal mesh (122), and the plurality of circular holes (123) are communicated with the space; The drainage tube (3) is connected to the groove section, and the inside of the drainage tube (3) is communicated with the space.

2. The intestinal anastomosis and anastomotic leakage metal stent according to claim 1, characterized in that, The metal stent (1) is woven from nitinol wires, and the plurality of circular holes (123) are distributed on the silica gel coating between the meshes of the outer layer metal mesh (122).

3. The intestinal anastomosis and anastomotic leakage metal stent according to claim 1, characterized in that One side of the drainage tube (3) passes between the inner layer metal mesh (121) and the outer layer metal mesh (122), is located in the space and is close to the inner layer metal mesh (121). The other side of the drainage tube (3) is led out from the inner cavity of the second raised section (13), and the drainage tube (3) located in the space is arranged along the length direction of the entire groove section.

4. The intestinal anastomosis and anastomotic leakage metal stent according to claim 3, wherein, The drainage tube (3) is single or double.

5. The intestinal anastomosis and anastomotic leakage metal stent according to claim 4, characterized in that, The single drainage tube (3) is a suction drainage tube. The leading end of the suction drainage tube is connected to an external negative pressure device through a negative pressure suction joint. A plurality of first side holes are provided on the tube wall of the suction drainage tube, and the plurality of first side holes are used to communicate the suction drainage tube and the space.

6. The intestinal anastomosis and anastomotic leakage metal stent according to claim 4, wherein The single drainage tube (3) is a double-channel tube, with a suction channel and a water injection channel arranged inside. A plurality of second side holes and a plurality of third side holes are provided on the tube wall of the double-channel tube. The plurality of second side holes are communicated with the suction channel and the space, and the plurality of third side holes are communicated with the water injection channel and the space; the leading end of the double-channel tube is connected with a negative pressure suction joint and an air injection joint. The negative pressure suction joint is communicated with the suction channel and is connected to an external negative pressure device, and the air injection joint is communicated with the water injection channel and is connected to an external water injection pipe.

7. The intestinal anastomosis and anastomotic leakage metal stent according to claim 4, characterized in that, The drainage tube (3) is double. The double drainage tubes (3) include a suction tube and a flushing tube. Both the suction tube and the flushing tube are single-channel tubes. The suction tube is connected to an external negative pressure device through a negative pressure suction joint, and the flushing tube is connected to an external water injection pipe through an air injection joint. The flushing tube is in a straight shape or a circular shape. A plurality of fourth side holes are provided on the tube wall of the suction tube, and the plurality of fourth side holes are used to communicate the suction tube and the space. A plurality of fifth side holes are provided on the tube wall of the flushing tube, and the plurality of fifth side holes are used to communicate the flushing tube and the space.

8. The intestinal anastomosis and anastomotic leakage metal stent according to claim 7, characterized in that, The suction tube and the flushing tube are symmetrically arranged with respect to the center of the metal stent (1).

9. The intestinal anastomosis and anastomotic leakage metal stent according to claim 1, characterized in that, The stent releasing device includes an outer sheath tube (21) and a pusher (22). The pusher (22) is inserted into the inner part of the outer sheath tube (21). Before the metal stent (1) is released, it is sleeved on the pusher (22) and located inside the outer sheath tube (21).

10. The intestinal anastomosis and anastomotic leakage metal stent according to claim 9, characterized in that, The head end of the outer sheath tube (21) is wrapped or not wrapped with a silica gel protection ring (23), and a first handle is provided at the tail of the outer sheath tube (21). The head end of the pusher (22) is in a conical structure, and a limiting structure is provided on the tube wall of the pusher (22). Before the metal stent (1) is released, it is sleeved between the conical structure and the limiting structure, and a second handle is provided at the tail of the pusher (22).

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