Intestinal canal anastomosis and anastomotic leakage stent system

Abstract

The intestinal canal anastomosis and anastomotic leakage stent system comprises a metal stent, a drainage device and a stent releasing device, the metal stent is arranged in the stent releasing device before being released, the stent releasing device is used for releasing the metal stent, the metal stent is dumbbell-shaped, the 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. 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, an anastomotic stoma and a ventage are kept clean, 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 more particularly, to an intestinal anastomosis and anastomotic leakage stent system. 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 and malignant nature of the obstructive disease, it can be classified into benign obstruction and malignant obstruction; according to the onset time 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 performing digestive tract 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, gastrostomy is mostly performed, and then digestive tract organ anastomosis and reduction are carried out after the organ edema subsides. Gastrostomy not only has cumbersome nursing, affects daily life and work, but also the secondary surgery to complete digestive tract organ 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 sealing the leak opening with the wall of the fully covered metal stent, the leakage of bile can be terminated, thereby promoting the healing of the leak opening. The above-mentioned fully covered metal stents have also been used in the treatment of digestive tract perforation and anastomotic leakage. However, under gastrointestinal peristalsis, the cylindrical fully covered metal stent is prone to displacement and loses the function of sealing the leak opening, 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 leak 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 leak opening, but also can lead to the further deterioration of anastomotic leakage.

[0005] To promote 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. 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. Through the continuous negative pressure suction of various secretions, inflammatory mediators and pus filtered by the polyurethane sponge through the vacuum tube, the healing of the leakage opening can be promoted. 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 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] According to the above-mentioned technical problems, an intestinal anastomosis and anastomotic leakage stent system is provided.

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

[0008] An intestinal anastomosis and anastomotic leakage stent system, comprising: 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 groove section in the middle;

[0009] The drainage device includes an air cushion and a drainage tube. The air cushion is wrapped on the groove section, is overall columnar, and is woven into a net by air columns; there is a space between the air cushion and the groove section, and the drainage tube is connected to the metal stent and communicates with the space.

[0010] Further, the surface of the air cushion is flat. The two ends of the air cushion are hemispherical ring-shaped air columns, and the middle is a criss-cross columnar air column, and the cross-combined parts of the columnar air columns in the middle are hemispherical ring-shaped air columns along the circumference.

[0011] Further, the air cushion is made of polyethylene, and the middle columnar air columns cross to form a square net or a rhombus net. The columnar air columns are provided or not provided with first side holes, and the air columns communicate with each other.

[0012] Further, the metal stent is woven by nitinol alloy wires and is wrapped with a silicone coating on both the inner and outer surfaces.

[0013] Further, one side of the drainage tube is fixed on the surface of the groove section and is located within the space, and the other side passes through the raised part at one end of the metal stent and is led out from the inner cavity of the raised part;

[0014] The drainage tube is a single multi-channel tube. Inside the single multi-channel tube, there are a first gas injection channel and a first negative pressure suction channel. An opening is provided on the side wall of the single multi-channel tube, and the opening is communicated with the first gas injection channel and one end of the hemispherical annular air column. The head end of the first gas injection channel is a blind end;

[0015] Multiple second side holes are formed on the side wall of the drainage tube fixed on the surface of the groove section, and the multiple second side holes are communicated with the space and the first negative pressure suction channel.

[0016] Further, one side of the drainage tube is fixed on the surface of the groove section and is located within the space, and the other side passes through the raised part at one end of the metal stent and is led out from the inner cavity of the raised part;

[0017] The drainage tube is a single triple-channel tube. Inside the single triple-channel tube, there are a second gas injection channel, a first water injection channel and a second negative pressure suction channel. An opening is provided on the side wall of the single multi-channel tube, and the opening is communicated with the second gas injection channel and one end of the hemispherical annular air column. The head end of the second gas injection channel is a blind end;

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

[0019] Further, the drainage tube includes an air injection tube and a first negative pressure suction tube, and the air injection tube and the first negative pressure suction tube are arranged on both sides of the metal stent;

[0020] The air injection tube penetrates through the raised part at one end of the metal stent and is connected to the hemispherical annular air column at the end close to the raised part; inside the air injection tube, there is a third gas injection channel or a second water injection channel communicated with the inside of the air cushion;

[0021] One side of the first negative pressure suction tube is fixed on the surface of the groove section and is located within the space, and the other side passes through the raised part at one end of the metal stent and is led out from the inner cavity of the raised part; inside the first negative pressure suction tube, there is a third negative pressure suction channel; multiple fifth side holes are formed on the side wall of the first negative pressure suction tube fixed on the surface of the groove section, and the multiple fifth side holes are communicated with the space and the third negative pressure suction channel.

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

[0023] One side of the injection tube is placed in the space, and the other side passes through the raised part at one end of the metal stent and extends out from the inner cavity of the raised part; the injection tube is a single double-channel tube, and a fourth gas injection channel and a third water injection channel are arranged inside the single double-channel tube. An opening is arranged on the side wall of the single double-channel tube, and the opening is communicated with the fourth gas injection channel and one end of a hemispherical annular air column. The head end of the fourth gas injection channel is a blind end; the injection tube placed in the space serves as a flushing tube, and the inside of the flushing tube is communicated with the third water injection channel. A plurality of sixth side holes are opened on the side wall of the flushing tube, and the plurality of sixth side holes are communicated with the space and the third water injection channel;

[0024] One side of the second negative pressure suction tube is fixed on the surface of the groove section and is located in the space, and the other side passes through the raised part at one end of the metal stent and extends out from the inner cavity of the raised part; a fourth negative pressure suction channel is arranged inside the second negative pressure suction tube. A plurality of seventh side holes are opened on the side wall of the second negative pressure suction tube fixed on the surface of the groove section, and the plurality of seventh side holes are communicated with the space and the fourth negative pressure suction channel.

[0025] Further, the flushing tube is columnar or annular.

[0026] 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;

[0027] The head end of the outer sheath tube is wrapped or not wrapped with a silica gel protection ring, and a first handle is arranged at the tail of the outer sheath tube;

[0028] The head end of the pusher is in a conical structure, and a limiting structure is arranged 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 arranged at the tail of the pusher.

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

[0030] 1. For the intestinal anastomosis and anastomotic leakage stent system provided by the present invention, the air cushion surface is smooth, has no irritation to the gastrointestinal mucosa, and will not increase the extra secretion of the gastrointestinal mucosa.

[0031] 2. For the intestinal anastomosis and anastomotic leakage stent system provided by the present invention, the air cushion is woven into a net by air columns, and the gaps between the air columns are larger, so it has a better drainage effect on viscous pus and secretions.

[0032] 3. For the intestinal anastomosis and anastomotic leakage stent system provided by the present invention, a relatively airtight space is formed between the air cushion and the groove section of the metal stent, and efficient drainage can be carried out on the space between the groove section of the metal stent and the gastrointestinal mucosa.

[0033] 4. The intestinal anastomosis and anastomotic leakage stent system provided by the present invention is provided with a water injection channel or a water injection tube. Water enters the space between the air cushion and the groove of the metal stent through the water outlet pipe or the air column hole, and then is led out through the negative pressure suction tube to form a closed loop. The flowing water can promote the suction of gastrointestinal mucosa or leakage secretions, and at the same time reduce the blockage rate of the side holes of the suction tube.

[0034] 5. The intestinal anastomosis and anastomotic leakage stent system 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 inserted into the digestive tract through the digestive tract for the treatment of anastomotic leakage or digestive tract perforation. Without a silica gel ring at the head end, when assembled into a short release device, it can be inserted into the digestive tract fistula through the digestive tract fistula for protecting the anastomotic opening during surgery without performing gastrointestinal fistula.

[0035] 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

[0036] 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.

[0037] Figure 1 FIG. is a schematic structural diagram of the intestinal anastomosis and anastomotic leakage stent system of the present invention, in which the head end of the stent release device is wrapped with a silica gel protection ring.

[0038] Figure 2 FIG. is another schematic structural diagram of the intestinal anastomosis and anastomotic leakage stent system of the present invention, in which the head end of the stent release device is not wrapped with a silica gel protection ring.

[0039] Figure 3 FIG. is a schematic structural diagram of the metal stent, air cushion and drainage tube of the present invention.

[0040] Figure 4 is Figure 3 a cross-sectional view of

[0041] Figure 5 FIG. is a schematic structural diagram of the metal stent of the present invention.

[0042] Figure 6 FIG. is a schematic structural diagram of the air cushion of the present invention.

[0043] Figure 7 FIG. is a schematic structural diagram of the drainage tube of the present invention.

[0044] Figure 8 FIG. is a schematic diagram of the square mesh air cushion and drainage tube of the present invention.

[0045] Figure 9 Schematic diagram of the diamond-shaped mesh air cushion and drainage tube of the present invention.

[0046] Figure 10 Schematic diagram of the air cushion, air injection tube and negative pressure suction tube of the present invention.

[0047] Figure 11 Schematic diagram of the air cushion, injection tube with annular flushing tube and negative pressure suction tube of the present invention.

[0048] Figure 12 Schematic diagram of the air cushion with side holes, air injection tube and negative pressure suction tube of the present invention.

[0049] Figure 13 Schematic diagram of the air cushion, injection tube with cylindrical flushing tube and negative pressure suction tube of the present invention.

[0050] In the figure: 1, metal bracket; 21, outer sheath tube; 22, pusher; 23, silicone protection 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 manners

[0051] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may 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.

[0052] 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 of the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. Based on the embodiments of 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.

[0053] Note that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to 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.

[0054] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical 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 dimensions of the various parts shown in the drawings are not drawn in 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 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 does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words 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 protection scope of the present invention: the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0056] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. 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 figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" 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 are made for the spatial relative descriptions used here.

[0057] In addition, it should be noted that the use of words such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional declaration, the above words have no special meaning, and thus should not be construed as a limitation on the protection scope of the present invention.

[0058] The present invention provides an intestinal anastomosis and anastomotic leakage stent system, including: a metal stent 1, a drainage device and a stent releasing device. The metal stent 1 is placed in the stent releasing device before release. The stent releasing device is used to release the metal stent 1. The metal stent 1 is dumbbell-shaped, with raised ends and a groove section in the middle; the drainage device includes a drainage tube 4 and an air cushion 3. The air cushion 3 wraps around the groove section and is overall columnar, woven into a net by air columns; there is a space between the air cushion 3 and the groove section, and the drainage tube 4 is connected to the metal stent 1 and communicates with the space.

[0059] Preferably, 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 part is interlaced columnar air columns, and the cross-binding parts of the middle columnar air columns are hemispherical ring-shaped air columns 31 along the circumference. The air cushion 3 is made of polyethylene, and the middle columnar air columns cross to form a square net or a rhombus net. The columnar air columns are provided or not provided with first side holes 32, and the air columns communicate with each other.

[0060] Preferably, the metal stent 1 is woven from nitinol wires and is wrapped with a silicone coating on both the inner and outer surfaces.

[0061] Preferably, one side of the drainage tube 4 is fixed on the surface of the groove section and located within the space, and the other side passes through the raised portion at one end of the metal stent 1 and is led out from the inner cavity of the raised portion; the drainage tube 4 is a single multi-channel tube, and the inside of the single multi-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 multi-channel tube is provided with an opening, and the opening is communicated with the first air injection channel 41 and one end of the hemispherical annular air column 31. The head end of the first air injection channel 41 is a blind end; a plurality of second side holes 43 are opened on the side wall of the drainage tube 4 fixed on the surface of the groove section, and the plurality of second side holes 43 are communicated with the space and the first negative pressure suction channel 42.

[0062] Preferably, one side of the drainage tube 4 is fixed on the surface of the groove section and located within the space, and the other side passes through the raised portion at one end of the metal stent 1 and is led out from the inner cavity of the raised portion; the drainage tube 4 is a single three-channel tube, and the inside of the single three-channel tube is provided with a second air injection channel, a first water injection channel and a second negative pressure suction channel. The side wall of the single multi-channel tube is provided with an opening, and the opening is communicated with the second air injection channel and one end of the hemispherical annular air column 31. The head end of the second air injection channel is a blind end; a plurality of third side holes and a plurality of fourth side holes are opened on the side wall of the drainage tube 4 fixed on the surface of the groove section. The plurality of third side holes are communicated with the space and the first water injection channel, and the plurality of fourth side holes are communicated with the space and the second negative pressure suction channel.

[0063] Preferably, the drainage tube 4 includes an air injection tube 44 and a first negative pressure suction tube 45. The air injection tube 44 and the first negative pressure suction tube 45 are arranged on both sides of the metal stent 1; the air injection tube 44 penetrates through the raised portion at one end of the metal stent 1 and is connected to the hemispherical annular air column 31 at the end close to the raised portion; the inside of the air injection tube 44 has a third air injection channel or a second water injection channel communicated with the inside of the air cushion 3; one side of the first negative pressure suction tube 45 is fixed on the surface of the groove section and located within the space, and the other side passes through the raised portion at one end of the metal stent 1 and is led out from the inner cavity of the raised portion; the inside of the first negative pressure suction tube 45 has a third negative pressure suction channel; a plurality of fifth side holes 46 are opened on the side wall of the first negative pressure suction tube 45 fixed on the surface of the groove section, and the plurality of fifth side holes 46 are communicated with the space and the third negative pressure suction channel.

[0064] Preferably, the drainage tube 4 includes an injection tube and a second negative pressure suction tube 411. The injection tube and the second negative pressure suction tube 411 are arranged on both sides of the metal stent 1. One side of the injection tube is placed in the space, and the other side passes through the raised part at one end of the metal stent 1 and is led out from the inner cavity of the raised part. The injection tube is a single double-channel tube, and the inside of the single double-channel tube is provided with a fourth gas injection channel 47 and a third water injection channel 48. The side wall of the single double-channel tube is provided with an opening, and the opening is communicated with the fourth gas injection channel 47 and one end of the hemispherical annular air column 31. The head end of the fourth gas injection channel 47 is a blind end. The injection tube placed in the space serves as the flushing tube 49, and the inside of the flushing tube 49 is communicated with the third water injection channel 48. A plurality of sixth side holes 410 are opened on the side wall of the flushing tube 49, and the plurality of sixth side holes 410 are communicated with the space and the third water injection channel 48. One side of the second negative pressure suction tube 411 is fixed on the surface of the groove section and is located in the space, and the other side passes through the raised part at one end of the metal stent 1 and is led out from the inner cavity of the raised part. The inside of the second negative pressure suction tube 411 has a fourth negative pressure suction channel. A plurality of seventh side holes 412 are opened on the side wall of the second negative pressure suction tube 411 fixed on the surface of the groove section, and the plurality of seventh side holes 412 are communicated with the space and the fourth negative pressure suction channel.

[0065] Preferably, the flushing tube 49 is columnar or annular (spiral).

[0066] Preferably, the stent releasing device includes an outer sheath tube 21 and a pusher 22. The pusher 22 is inserted into the inside of the outer sheath tube 21. Before the metal stent 1 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 the 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 1 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.

[0067] By injecting gas or water, the present invention can fill the air cushion, so as to form a connected closed space between the intestinal mucosa and the surface of the metal stent. By continuously sucking out the secretions or blood of the intestinal mucosa, blood vessels, and leak orifice tissues through negative pressure, the cleanliness of the anastomotic stoma and the leak orifice can be maintained, and the healing of the anastomotic stoma and the leak orifice can be promoted. By continuously injecting water into the closed space between the intestinal mucosa and the surface of the metal stent and continuously flushing the anastomotic stoma mucosa and the leak orifice, not only can the discharge of inflammatory mediators secreted by the anastomotic stoma and the leak orifice be promoted, but also the blockage rate of the negative pressure drainage tube can be reduced, thereby accelerating the healing of the anastomotic stoma and the leak orifice.

[0068] The use of the present invention:

[0069] 1. Treatment of digestive tract perforation or anastomotic leakage

[0070] During gastrointestinal endoscopy, if a perforation of the digestive tract or an anastomotic leakage is found, a guide wire is inserted and advanced into the distal digestive tract, and the stent system is inserted under the guidance of the guide wire. The stent pusher of the stent release device is fixed and the outer sheath tube is retracted, 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 retracted until the drainage tube is separated from the stent release device.

[0071] 1.1 Single double-channel drainage tube

[0072] The double-channel drainage tube is connected to the gas injection joint and the negative pressure suction joint. Air or liquid is injected through the gas injection joint to fill the air cushion wrapping the groove of the metal stent, forming an annular network air cushion; an external negative pressure suction tube is connected through the negative pressure suction joint, and the secretions between the air cushion and the grooved metal stent are intermittently or continuously sucked out.

[0073] 1.2 Single double-channel irrigation and drainage tube

[0074] The double-channel drainage tube is connected to the gas injection joint and the negative pressure suction joint. Air or water is injected through the gas injection joint to fill the air cushion wrapping the groove of the metal stent, forming an annular network air cushion; the air or water in the air column enters the closed space between the air cushion and the metal stent groove through the side holes on the surface of the air column near the metal stent groove; an external negative pressure suction tube is connected through the negative pressure suction joint, and the air, water and secretions between the air cushion and the grooved metal stent are intermittently or continuously sucked out.

[0075] 1.3 Single triple-channel irrigation and drainage tube

[0076] The triple-channel drainage tube is connected to the gas injection joint, the water injection joint and the negative pressure suction joint. Air or water is injected through the gas injection joint to fill the air cushion wrapping the groove of the metal stent, forming an annular network air cushion; water is injected through the water injection joint, and the water flows into the water outlet pipe placed on the surface of the metal stent groove and enters the closed space between the air cushion and the metal stent groove through its side holes; a negative pressure suction tube is connected through the negative pressure suction joint, and the water and secretions between the air cushion and the grooved metal stent are intermittently or continuously sucked out.

[0077] 1.4 Single-channel + double-channel drainage tube

[0078] The double-channel drainage tube is connected to the joint. Air or liquid is injected through the gas injection joint to fill the air cushion wrapping the groove of the metal stent, forming an annular network air cushion; water is injected through the water injection joint, and the water flows into the water outlet pipe placed on the surface of the metal stent groove and enters the closed space between the air cushion and the metal stent groove through its side holes. The single-channel tube is a negative pressure suction tube, and negative pressure is connected through the joint, and the water and secretions between the air cushion and the grooved metal stent can be intermittently or continuously sucked out.

[0079] 2. Acute intestinal anastomosis

[0080] 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 anastomosis, and the present 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. 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 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. Air or water is injected into the air cushion to inflate the air cushion, and the secretions between the air cushion and the grooved metal stent are intermittently or continuously aspirated through negative pressure. Alternatively, air or water can be injected into the closed gap between the air cushion and the grooved metal stent to continuously dilute the secretions and promote the discharge of the secretions.

[0081] Finally, it should be noted that the above 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 and anastomotic leakage stent system, characterized in that, Comprising: A metal stent (1), a drainage device, and a stent releasing device. Before being released, the metal stent (1) is placed inside the stent releasing device, and the stent releasing device is used to release the metal stent (1). The metal stent (1) is dumbbell-shaped, with raised ends and a groove section in the middle. The drainage device includes an air cushion (3) and a drainage tube (4). The air cushion (3) is wrapped around the groove section, is columnar as a whole, and is woven into a net by air columns. There is a space between the air cushion (3) and the groove section, and the drainage tube (4) is connected to the metal stent (1) and communicates with the space.

2. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, wherein, 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 in the middle are intersecting columnar air columns. And the cross-binding parts of the middle columnar air columns are hemispherical ring-shaped air columns (31) along the circumference.

3. The intestinal anastomosis and anastomotic leakage stent system according to claim 2, wherein, The air cushion (3) is made of polyethylene. The middle columnar air columns intersect to form a square net or a rhombus net. The columnar air columns may or may not be provided with first side holes (32), and the air columns communicate with each other.

4. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, characterized in that, The metal stent (1) is woven from nitinol wires and is wrapped with a silicone coating on both the inner and outer surfaces.

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 on the surface of the groove section and is located in the space, and the other side passes through one raised end of the metal stent (1) and is led out from the inner cavity of the raised end. The drainage tube (4) is a single three-channel tube. The inside of the single three-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 three-channel tube is provided with an opening, and the opening communicates with the first air injection channel (41) and one end of the hemispherical ring-shaped air column (31). The head end of the first air injection channel (41) is a blind end. A plurality of second side holes (43) are opened on the side wall of the drainage tube (4) fixed on the surface of the groove section. The plurality of second side holes (43) communicate with 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 on the surface of the groove section and is located in the space, and the other side passes through one raised end of the metal stent (1) and is led out from the inner cavity of the raised end. The drainage tube (4) is a single three-channel tube. The inside of the single three-channel tube is provided with a second air injection channel, a first water injection channel, and a second negative pressure suction channel. The side wall of the single three-channel tube is provided with an opening, and the opening communicates with the second air injection channel and one end of the hemispherical ring-shaped air column (31). The head end of the second air injection channel is a blind end. A plurality of third side holes and a plurality of fourth side holes are opened on the side wall of the drainage tube (4) fixed on the surface of the groove section. The plurality of third side holes communicate with the space and the first water injection channel, and the plurality of fourth side holes communicate with 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). The air injection tube (44) and the first negative pressure suction tube (45) are arranged on both sides of the metal stent (1). The injection gas pipe (44) penetrates through the raised part at one end of the metal stent (1) and is connected to the end hemispherical annular air column (31) near the raised part; the interior of the injection gas pipe (44) has a third gas 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 pipe (45) is fixed on the surface of the groove section and is located within the space, and the other side passes through the raised part at one end of the metal stent (1) and is led out from the inner cavity of the raised part; the interior of the first negative pressure suction pipe (45) has a third negative pressure suction channel; a plurality of fifth side holes (46) are opened on the side wall of the first negative pressure suction pipe (45) fixed on the surface of the groove section, and the plurality of fifth side holes (46) communicate with 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 pipe (4) includes an injection pipe and a second negative pressure suction pipe (411), and the injection pipe and the second negative pressure suction pipe (411) are arranged on both sides of the metal stent (1). One side of the injection pipe is placed within the space, and the other side passes through the raised part at one end of the metal stent (1) and is led out from the inner cavity of the raised part; the injection pipe is a single double-channel pipe, and the interior of the single double-channel pipe is provided with a fourth gas injection channel (47) and a third water injection channel (48), and an opening is provided on the side wall of the single double-channel pipe, and the opening communicates with the fourth gas injection channel (47) and one end hemispherical annular air column (31), and the head end of the fourth gas injection channel (47) is a blind end; the injection pipe placed within the space serves as a flushing pipe (49), and the interior of the flushing pipe (49) communicates with the third water injection channel (48), and a plurality of sixth side holes (410) are opened on the side wall of the flushing pipe (49), and the plurality of sixth side holes (410) communicate with the space and the third water injection channel (48). One side of the second negative pressure suction pipe (411) is fixed on the surface of the groove section and is located within the space, and the other side passes through the raised part at one end of the metal stent (1) and is led out from the inner cavity of the raised part; the interior of the second negative pressure suction pipe (411) has a fourth negative pressure suction channel. A plurality of seventh side holes (412) are opened on the side wall of the second negative pressure suction pipe (411) fixed on the surface of the groove section, and the plurality of seventh side holes (412) communicate with the space and the fourth negative pressure suction channel.

9. The intestinal anastomosis and anastomotic leakage stent system according to claim 8, wherein The flushing pipe (49) is columnar or annular.

10. The intestinal anastomosis and anastomotic leakage stent system according to claim 1, wherein, The stent release 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), and the metal stent (1) is sleeved on the pusher (22) before release and is located within 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 the tail of the outer sheath tube (21) is provided with a first handle. The head end of the pusher (22) has a conical structure, a limiting structure is provided on the tube wall of the pusher (22), and the metal stent (1) is sleeved between the conical structure and the limiting structure before release, and the tail of the pusher (22) is provided with a second handle.

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