Intestinal anastomosis metal stent system with suction function

Abstract

The invention provides an intestinal anastomosis metal stent system with a suction function, which comprises a metal stent, an inner membrane, an outer membrane, a drainage tube and a stent release device, the metal stent is dumbbell-shaped, two sides of the metal stent are raised, and the middle of the metal stent is a groove section; the inner film is a double-layer film and comprises a first film and a second film which are attached to the inner side and the outer side of the metal stent, and the first film and the second film are attached to wrap the metal stent into a whole; the outer film wraps the metal support and wraps the outer side of the second film. The two ends of the outer film are fixedly attached to the outer side of the second film at the protruding positions of the two sides, a space is formed between the outer film and the second film, and a plurality of through holes are formed in the outer film. The drainage tube is communicated with the space; the metal support is in the support releasing device before being released. After the metal stent is released, liquid secreted by an intestinal canal stoma, intestinal mucosa, blood vessels and stoma tissue can be blocked or supported, the liquid can enter a gap between the outer membrane and the inner membrane through the through holes in the outer membrane and is sucked out by negative pressure, the stoma and the stoma are kept clean, and healing of the stoma and the stoma is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly, to an intestinal anastomosis metal stent system with an aspiration function. Background Art

[0002] Digestive tract obstruction is relatively common clinically. 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 or malignant nature of the obstructive disease, it can be classified into benign obstruction and malignant obstruction; according to the time of occurrence 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 often performed, and then gastrointestinal anastomosis and reduction are carried out after the organ edema subsides. Gastrointestinal fistula not only requires cumbersome nursing, affecting daily life and work, but also the secondary surgery for gastrointestinal anastomosis and reduction will further increase the economic burden and physical pain of the patient.

[0004] Fully covered nitinol metal stents have been widely used in the treatment of bile leakage. By blocking the leakage opening with the tube wall of the fully covered metal stent, the leakage of bile can be terminated, thereby promoting the healing of the leakage opening. The above-mentioned fully covered metal stents have also been used in the treatment of gastrointestinal perforation and anastomotic leakage. However, under gastrointestinal peristalsis, the cylindrical fully covered metal stent is prone to displacement, losing the function of blocking the leakage opening, thus 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 opening is easily accumulated in the middle depression of the fully covered metal stent, which not only is not conducive to the healing of the leakage opening, 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 has applied for a negative pressure suction stent (Patent No.: WO2024170414A1). This stent is a dumbbell-shaped fully covered metal stent. A polyurethane sponge is sleeved in the middle of the depression of the stent, and there is a vacuum tube between the sponge and the concave surface of the metal stent. By continuously sucking out 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-mentioned 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 liquids secreted by the gastrointestinal mucosa and the leakage opening. Massive necrotic tissues or purulent moss will deposit on the surface and gaps of the polyurethane sponge or block the suction tube, 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. 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, a metal intestinal anastomosis stent system with an aspiration function is provided.

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

[0008] A metal intestinal anastomosis stent system with an aspiration function, comprising: a metal stent, an inner membrane, an outer membrane, a drainage tube, and a stent release device. The metal stent is dumbbell-shaped, with bulges on both sides and a groove section in the middle;

[0009] The inner membrane is a double-layer membrane, which includes a first membrane and a second membrane. The first membrane is attached to the inner side of the metal stent, and the second membrane is attached to the outer side of the metal stent. The first membrane and the second membrane are attached to each other to wrap the metal stent into a whole;

[0010] The outer membrane wraps the metal stent and is wrapped on the outside of the second membrane; both ends of the outer membrane are fixedly attached to the outside of the second membrane at the bulges on both sides. There is a space between the outer membrane and the second membrane, and the outer membrane is provided with a plurality of through holes, and all the plurality of through holes are communicated with the space;

[0011] The drainage tube is communicated with the space;

[0012] Before being released, the metal stent is arranged in the stent release device.

[0013] Furthermore, the metal stent is woven from nitinol alloy wires, and a recovery wire loop is provided on the metal stent.

[0014] Further, the outer surface of the outer membrane is smooth, and the inner surface is provided with a plurality of protrusions which are arranged in a crisscross pattern; the plurality of through holes include a plurality of large holes and a plurality of small holes, and the plurality of large holes and the plurality of small holes are distributed between the plurality of protrusions;

[0015] Both ends of the outer membrane are fixedly connected to the outermost ends of both sides of the metal stent to the highest points of the bulges on both sides.

[0016] Further, the drainage tube enters through the inside of the bulge on one side of the metal stent, passes through the bulge on that side and enters the space, and fits on the second membrane; the drainage tube located in the space is arranged in the length direction of the entire groove section.

[0017] Further, the drainage tube is single or double.

[0018] Further, the single drainage tube is a suction tube, the lead-out end of the suction tube is connected to an external negative pressure device through a negative pressure suction joint, and a plurality of first side holes are provided on the tube wall of the suction tube, and the plurality of first side holes are used to connect the suction tube and the space.

[0019] Further, the single drainage tube is a double-channel tube, which is internally provided with a suction channel and a water injection channel. 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 lead-out 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 connected to an external negative pressure device, and the air injection joint is connected to the water injection channel and connected to an external water injection pipe.

[0020] Further, the drainage tube is double, and 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. 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.

[0021] Further, the suction tube and the flushing tube are symmetrically arranged with the center of the metal stent as the center, and the flushing tube is in a straight line or a ring shape.

[0022] Further, the stent release device includes an outer sheath tube and a pusher. The pusher is inserted into the inside 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;

[0023] The head end of the outer sheath tube is wrapped or not wrapped with a silicone protection ring, and the tail of the outer sheath tube is provided with a first handle;

[0024] 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. A second handle is provided at the tail of the pusher.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. For the intestinal anastomosis metal stent system with suction function provided by the present invention, the metal stent is provided with an outer membrane, and the surface of the outer membrane is smooth, which can reduce the irritation of the digestive tract mucosa and reduce the generation of secretions.

[0027] 2. For the intestinal anastomosis metal stent system with suction function provided by the present invention, the outer membrane is provided with holes, and the liquid secreted by the gastrointestinal mucosa and the leakage opening can enter the gap between the inner membrane and the outer membrane through the holes and be sucked out by the negative pressure drainage tube, which can promote the healing of the anastomosis and the leakage opening.

[0028] 3. For the intestinal anastomosis metal stent system with suction function provided by the present invention, a relatively airtight space is formed between the outer membrane and the inner membrane, which can promote large pieces of pus and necrotic tissue to enter the airtight space through the holes in the outer membrane, and the drainage efficiency is higher.

[0029] 4. For the intestinal anastomosis metal stent system with suction function provided by the present invention, the inner membrane is fixed on the metal stent mesh, and multiple protrusions are provided on the outer surface of the inner membrane. Under the extrusion of the gastrointestinal mucosa on the outer membrane, there is still a large gap between the outer membrane and the inner membrane, and the negative pressure drainage efficiency is high. The flushing liquid can enter the suction tube through the gap, avoiding the accumulation of the flushing liquid.

[0030] 5. For the intestinal anastomosis metal stent system with suction function provided by the present invention, recovery wire loops are provided at both ends of the metal stent, and the metal stent can be taken out through the digestive tract by pulling the recovery wire loops under endoscopy.

[0031] Based on the above reasons, the present invention can be widely promoted in the fields of medical treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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 to be used in 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.

[0033] Figure 1 It is a schematic structural diagram of the present invention.

[0034] Figure 2 It is a schematic structural diagram of the metal stent and the drainage tube of the present invention.

[0035] Figure 3 isFigure 2 Cross-sectional view.

[0036] Figure 4 Schematic diagram of the partial unfolding of the outer membrane of the present invention.

[0037] Figure 5 Schematic diagram of the structure of the metal stent mesh at the inner membrane of the present invention.

[0038] Figure 6 Isometric view of the outer membrane.

[0039] Figure 7 Isometric view of the metal stent.

[0040] In the figure: 11, metal stent; 12, inner membrane; 13, outer membrane; 131, large hole; 132, small hole; 133, protrusion; 21, outer sheath tube; 22, pusher; 23, silicone protection ring; 3, drainage tube. Detailed implementation manners

[0041] 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.

[0042] 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 drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that the terms used here are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0044] 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 sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. 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 description. In all the examples shown and discussed here, 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 does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings. It is 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, it should not be construed as limiting the protection scope of the present invention: the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0046] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0047] In addition, it should be noted that the use of words such as "first", "second" etc. to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above words have no special meanings. Therefore, it should not be construed as limiting the protection scope of the present invention.

[0048] Such as Figures 1 - 7As shown in the figure, the present invention provides an intestinal anastomosis metal stent system with an attracting function, comprising: a metal stent 11, an inner membrane 12, an outer membrane 13, a drainage tube 3 and a stent releasing device. The metal stent 11 is dumbbell-shaped, with bulges on both sides and a groove section in the middle; the inner membrane 12 is a double-layer membrane that wraps the metal stent. The double-layer membrane includes a first membrane and a second membrane. The first membrane is attached to the inner side of the metal stent 11, and the second membrane is attached to the outer side of the metal stent 11. The two membranes (the first membrane and the second membrane) are attached to each other to wrap the metal stent 11 into a whole; the outer membrane 13 wraps the metal stent 11 and is wrapped on the outer side of the second membrane; both ends of the outer membrane 13 are attached to the inner membrane at the bulges on both sides of the metal stent 11, that is, both ends of the outer membrane 13 are attached and fixed to the outer side of the second membrane at the bulges on both sides. There is a space between the outer membrane 13 and the second membrane, and multiple through holes are provided on the outer membrane 13, and all the multiple through holes communicate with the space; the drainage tube 3 communicates with the space; the metal stent 11 is arranged in the stent releasing device before being released.

[0049] Preferably, the metal stent 11 is woven from nitinol wires, and a retrieval wire loop is provided on the metal stent 11.

[0050] Preferably, the outer surface of the outer membrane 13 is smooth, and multiple protrusions 133 are provided on the inner surface; the multiple protrusions 133 are arranged in a criss-cross pattern; the multiple through holes include multiple large holes 131 and multiple small holes 132, and the multiple large holes 131 and the multiple small holes 132 are distributed between the multiple protrusions 133; both ends of the outer membrane 13 are fixedly connected to the metal stent 11 between the outermost ends on both sides and the highest points of the bulges on both sides respectively. The diameter of the large holes 131 is larger than that of the small holes 132, and the large holes 131 and the small holes 132 can be arranged according to actual needs and the shape of the multiple protrusions 133. Generally speaking, the larger the hole, the denser the distribution of the holes, and the better the drainage effect. However, if the holes are too large, the intestinal mucosal villi, etc. will enter the large holes 131 and block the large holes 131. Therefore, the outer membrane 13 cannot be entirely arranged with large holes 131. At the same time, it cannot be all small holes 132 either, because large pieces of tissue, etc. cannot pass through the small holes 132. Therefore, it is necessary to set large and small holes. In this embodiment, the arrangement of the multiple large holes 131, the multiple small holes 132 and the multiple protrusions 133 is not limited to Figure 4For the distribution method in [description], small holes 132 can also be provided between two adjacent protrusions 133 arranged horizontally, and a large hole 131 is provided at the center of four protrusions 133 in a parallelogram shape on three adjacent rows. Also, it is necessary to arrange the large hole 131 and the small holes 132 according to the remaining space size after arranging multiple protrusions 133 on the outer membrane 13. For example, when a large hole 131 is arranged at the center of four protrusions 133, and the space between two adjacent protrusions 133 arranged horizontally is not sufficient to arrange another large hole 131, small holes 132 need to be arranged at this time. Therefore, it is necessary to arrange the large and small holes according to the actual structure of the outer membrane 13 to achieve a better drainage effect. It should be noted that since the sizes of the metal stents are different during actual use, the sizes of the large hole 131, the small holes 132, and the protrusions 133 need to be determined according to the model of the metal stent.

[0051] Preferably, the drainage tube 3 enters through the inside of the bulge on one side of the metal stent 11 (the right bulge in the figure), passes through the bulge on this side and enters the space (perforated metal stent mesh), and adheres to the second membrane; the drainage tube 3 located in the space is arranged in the length direction of the entire 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.

[0052] The drainage tube 3 of the present invention can also be directly fixedly connected to the outer membrane 13 and inserted into the space through the outer surface of the outer membrane 13, such as Figure 7 As shown, both drainage tubes 3 are inserted into the space from the outer surface of the outer membrane 13, but the drainage effect of this arrangement method of the drainage tube 3 is not as good as the effect of entering the space from the bulge, because the present invention preferably allows the drainage tube 3 to enter through the inside of the bulge on one side of the metal stent 11, pass through the bulge on this side and enter the space, and adhere to the second membrane.

[0053] Preferably, the drainage tube 3 is single or double.

[0054] Preferably, the single drainage tube 3 is a suction tube, and the leading end of the suction 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 tube, and the plurality of first side holes are used to communicate the suction tube and the space.

[0055] Preferably, the single drainage tube 3 is a double-channel tube, with a suction channel and a water injection channel provided 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 communicate the suction channel and the space, and the plurality of third side holes communicate 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 communicates with the suction channel and is connected to an external negative pressure device, and the air injection joint communicates with the water injection channel and is connected to an external water injection pipe.

[0056] Preferably, the drainage tube 3 is a double-tube. The double-tube drainage tube 3 includes 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 tube through an air injection joint. 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.

[0057] Preferably, the suction tube and the flushing tube are symmetrically arranged with the center of the metal stent 11. The flushing tube is linear or annular (i.e., spiral).

[0058] Preferably, the stent releasing device includes an outer sheath tube 21 and a pusher 22. The pusher 22 is inserted into the interior of the outer sheath tube 21. Before the metal stent 11 is released, it is sleeved on the pusher 22 and is located inside the outer sheath tube 21. The head end of the outer sheath tube 21 wraps or does not wrap 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 (an existing limiting structure can be used) is provided on the tube wall of the pusher 22. Before the metal stent 11 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.

[0059] After the metal stent of the present invention is released, it can block the intestinal fistula or support the intestinal anastomosis. The liquid secreted by the intestinal mucosa, blood vessels, and fistula tissue can enter the gap between the outer membrane and the inner membrane through the through holes on the outer membrane and be sucked out by negative pressure, which can keep the anastomosis and fistula clean and promote the healing of the anastomosis and fistula. By continuously injecting saline or air into the gap between the outer membrane and the inner membrane to continuously flush the anastomotic mucosa and fistula, it can not only promote the discharge of inflammatory mediators secreted by the anastomosis and fistula, but also reduce the blockage rate of the negative pressure drainage tube, thereby accelerating the healing of the anastomosis and fistula.

[0060] The use of the present invention:

[0061] 1. Treatment of digestive tract perforation or anastomotic leakage

[0062] During gastroscopy examination, if digestive tract perforation or anastomotic leakage is found, a guide wire is inserted and enters the distal digestive tract. Under the guidance of the guide wire, the present metal stent system is inserted. The stent pusher of the stent releasing device is fixed and the outer sheath tube is pulled back. 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 releasing device is pulled back until the drainage tube is separated from the stent releasing device.

[0063] 1.1 Single suction tube

[0064] The leading end of the suction tube is connected to an external negative pressure device (existing device) through a negative pressure suction joint, and the secretions between the second membrane and the outer membrane entering the inner membrane can be intermittently or continuously sucked out.

[0065] 1.2 Single - root double - channel irrigation and drainage tube

[0066] The leading - out end of the double - channel drainage tube is connected to 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 inner membrane and the outer membrane. The negative - pressure suction joint is connected to a negative - pressure suction tube, and the air, water, and secretions between the second membrane of the inner membrane and the outer membrane are intermittently or continuously sucked out.

[0067] 1.3 Double - root single - channel irrigation and drainage tube

[0068] Air or water is injected into one drainage tube through the air - injection joint, and the air or water flows into the cavity between the second membrane of the inner membrane and the outer membrane through the side holes of the drainage tube. The negative - pressure suction joint is connected to a negative - pressure suction tube, and the water and secretions in the cavity between the second membrane of the inner membrane and the outer membrane are intermittently or continuously sucked out.

[0069] 2. Acute - phase intestinal anastomosis

[0070] For patients with acute intestinal obstruction, after resection of necrotic and stenotic intestinal segments, enterostomy is not required, and end - to - end anastomosis of edematous intestinal segments is directly performed. The intestinal wall is incised away from the anastomosis, and this stent system is inserted through the incision. The anastomosis is located in the middle of the stent. After squeezing the intestinal segments at both ends of the anastomosis towards the middle of the stent, the stent pusher of the stent release device is fixed and the outer sheath tube is pulled back. 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 of the metal stent is in a folded state, and there is no tension at the anastomosis. 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 absorbable sutures are sutured throughout the intestinal wall incision and the descending muscular layer and then fixed to the drainage tube. 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 inner membrane and the outer membrane are intermittently or continuously sucked out. Air or water can also be continuously injected into the gap between the inner membrane and the outer membrane to continuously dilute the secretions and promote the discharge of the secretions.

[0071] Finally, it should be noted that the above - mentioned embodiments are only used to illustrate the technical solutions of the present invention, rather than 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intestinal anastomosis metal stent system with an attracting function, characterized in that, Comprising: A metal stent (11), an inner membrane (12), an outer membrane (13), a drainage tube (3) and a stent release device. The metal stent (11) is dumbbell-shaped, with bulges on both sides and a groove section in the middle; The inner membrane (12) is a double-layer membrane, and the double-layer membrane includes a first membrane and a second membrane. The first membrane is attached to the inner side of the metal stent (11), and the second membrane is attached to the outer side of the metal stent (11). The first membrane and the second membrane are attached to each other to wrap the metal stent (11) into a whole; The outer membrane (13) wraps the metal stent (11) and is wrapped on the outer side of the second membrane; both ends of the outer membrane (13) are fixedly attached to the outer side of the second membrane at the bulges on both sides. There is a space between the outer membrane (13) and the second membrane. The outer membrane (13) is provided with a plurality of through holes, and all the plurality of through holes communicate with the space; The drainage tube (3) communicates with the space; Before being released, the metal stent (11) is arranged in the stent release device.

2. The intestinal anastomosis metal stent system with an attracting function according to claim 1, characterized in that, The metal stent (11) is woven from nitinol alloy wires, and a recovery wire loop is provided on the metal stent (11).

3. The intestinal anastomosis metal stent system with an attracting function according to claim 1, characterized in that, The outer surface of the outer membrane (13) is smooth, and a plurality of protrusions (133) are provided on the inner surface. The plurality of protrusions (133) are arranged in a criss-cross manner; the plurality of through holes include a plurality of large holes (131) and a plurality of small holes (132), and the plurality of large holes (131) and the plurality of small holes (132) are distributed between the plurality of protrusions (133); Both ends of the outer membrane (13) are fixedly connected to the outer side of the metal stent (11) between the outermost ends on both sides and the highest points of the bulges on both sides.

4. The intestinal anastomosis metal stent system with an attracting function according to claim 1, characterized in that, The drainage tube (3) enters through the inside of a bulge on one side of the metal stent (11), passes through the bulge on that side and enters the space, and is attached to the second membrane; the drainage tube (3) located in the space is arranged in the length direction of the entire groove section.

5. The intestinal anastomosis metal stent system with an attracting function according to claim 4, characterized in that, The drainage tube (3) is single or double.

6. The intestinal anastomosis metal stent system with an attracting function according to claim 4, wherein The single drainage tube (3) is a suction tube. The leading end of the suction 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 tube, and the plurality of first side holes are used to communicate the suction tube and the space.

7. The intestinal anastomosis metal stent system with an attracting function according to claim 4, characterized in that, 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 communicate the suction channel and the space, and the plurality of third side holes communicate 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 communicates with the suction channel and is connected to an external negative pressure device, and the air injection joint communicates with the water injection channel and is connected to an external water injection pipe.

8. The intestinal anastomosis metal stent system with an attracting function 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. 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.

9. The intestinal anastomosis metal stent system with an attracting function according to claim 8, characterized in that, The aspiration tube and the irrigation tube are symmetrically arranged with respect to the center of the metal stent (11), and the irrigation tube is linear or annular.

10. The intestinal anastomosis metal stent system with an attraction function 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 interior of the outer sheath tube (21). Before the metal stent (11) is released, it is sleeved on the pusher (22) and is located inside the outer sheath tube (21). The head end of the outer sheath tube (21) is wrapped or not wrapped with a silica gel protection ring (23), and the tail of the outer sheath tube (21) is provided with a first handle. 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 (11) is released, it is sleeved between the conical structure and the limiting structure. The tail of the pusher (22) is provided with a second handle.

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