Anastomosis protecting stent
By designing an anastomotic protection stent with a cylindrical mesh structure and a multi-lobed anti-reflux device that can open and close in the lower middle part, the problems of stent displacement in the digestive tract and the complexity of traditional anastomosis methods are solved, achieving stent stability and anti-reflux effect, and reducing the occurrence of anastomotic complications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 查鹏
- Filing Date
- 2025-04-22
- Publication Date
- 2026-06-26
AI Technical Summary
Existing gastrointestinal stents are prone to displacement or slippage under the influence of gravity and gastrointestinal peristalsis, leading to complications such as anastomotic leakage and anastomotic stenosis. In addition, traditional manual anastomosis is complicated to operate and has a high incidence of anastomotic leakage.
Design an anastomosis protection bracket with a cylindrical mesh structure, an openable multi-lobed conical anti-backflow device in the lower part, covered with a membrane on the inner and outer sides, supported by a metal wire skeleton, and the anti-backflow device is set at the bottom to ensure stability and anti-backflow function.
It effectively prevents stent displacement, reduces the incidence of anastomotic complications, simplifies surgical procedures, reduces costs, and improves patient prognosis and quality of life.
Smart Images
Figure CN224403704U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an anastomosis protection stent. Background Technology
[0002] Esophageal cancer is a common malignant tumor worldwide. The most common treatments for esophageal cancer are subtotal esophagectomy, proximal subtotal gastrectomy, and esophagogastric anastomosis. However, complications such as anastomotic leakage and anastomotic stenosis after surgery can seriously endanger the lives of esophageal cancer patients.
[0003] Traditionally, esophagogastric anastomosis is mostly performed manually, which is time-consuming, complex, and has a high incidence of anastomotic leakage. Although mechanical anastomosis with a stapler can be used now, reducing the incidence of anastomotic leakage to some extent, some patients still experience complications such as anastomotic leakage and anastomotic stenosis for various reasons. Therefore, it is urgent to reduce the incidence and mortality of anastomotic leakage and anastomotic stenosis-related complications in esophageal cancer and gastrointestinal surgery, and to improve patient prognosis and postoperative quality of life.
[0004] To improve the life safety, prognosis and quality of life of patients with anastomotic leakage, modern medicine often uses gastrointestinal stents for access therapy. However, gastrointestinal stents often shift or even slip out under the influence of gravity and gastrointestinal peristalsis, and have poor stability. Re-placement of the stent due to slippage can cause pain and unnecessary trouble for the patient.
[0005] Therefore, there is an urgent need for an anastomotic protection stent that can solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide an anastomosis protection stent to solve the problems existing in the prior art.
[0007] To achieve the above objectives, this utility model provides the following solution:
[0008] This utility model provides an anastomosis protection stent, including a protective stent body. The protective stent body has a cylindrical mesh structure. An anti-backflow device is provided in the lower middle part of the protective stent body. The anti-backflow device has a multi-lobed conical structure. The inner sidewall of the protective stent body and the surface of the anti-backflow device are covered with an inner film, and the outer sidewall of the protective stent body is covered with an outer film.
[0009] Preferably, the anti-backflow device is located at the lower 1 / 3 height of the main body of the protective bracket.
[0010] Preferably, the anti-backflow device adopts a three-lobed structure, each lobe including at least 3 metal wire skeletons, and the metal wire skeletons are radially distributed along the center of the protective support body.
[0011] Preferably, the wire skeleton includes a vertical part and an inclined part, the angle between the vertical part and the inclined part is 100°-160°, and the angle between the inclined part and the side wall of the protective bracket body is 15°-75°.
[0012] Preferably, the inner layer coating includes an upper inner layer coating and a lower inner layer coating. The upper part of the upper inner layer coating is rectangular and is bonded to the inner wall of the protective bracket body. The lower part of the upper inner layer coating has three serrated sections, which are bonded to the upper surface of the three-lobed anti-backflow device. The lower part of the lower inner layer coating is rectangular and is bonded to the inner wall of the protective bracket body. The upper part of the lower inner layer coating has three serrated sections, which are bonded to the lower surface of the three-lobed anti-backflow device.
[0013] The present invention achieves the following beneficial technical effects compared to the prior art:
[0014] This utility model provides an anastomotic protection stent, which includes a stent body with a cylindrical mesh structure. An anti-reflux device is provided in the lower middle part of the stent body, which is openable and closable. The anti-reflux device has a multi-lobed conical structure. The inner wall of the stent body and the surface of the anti-reflux device are covered with an inner film, and the outer wall of the stent body is covered with an outer film. The anastomotic protection stent has a simple structure, is easy to manufacture, has low operating costs, and is convenient for surgical use. It can effectively prevent stent displacement and reduce the occurrence of anastomotic complications. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the protective bracket structure in one embodiment of the present utility model;
[0017] Figure 2 This is a schematic diagram of the anti-backflow device end face in one embodiment of the present invention;
[0018] Figure 3 This is a schematic diagram of the anti-backflow device skeleton structure in one embodiment of the present invention;
[0019] Figure 4 This is a detailed structural diagram of the protective bracket in one embodiment of the present utility model;
[0020] Figure 5 This is a schematic diagram of the included angle of the anti-backflow device in one embodiment of the present invention;
[0021] Figure 6 This is a schematic diagram of the included angle of the wire skeleton in one embodiment of the present invention;
[0022] Figure 7 This is a schematic diagram of the inner layer coating structure in one embodiment of the present invention;
[0023] Figure 8 This is a schematic diagram of the inner layer undercoat structure in one embodiment of the present invention;
[0024] Figure 9 This is a schematic diagram of the inner and outer film fixing process of the protective bracket in one embodiment of the present utility model;
[0025] Figure 10 This is a schematic diagram of the digestive tract lumen in one embodiment of the present invention;
[0026] Figure 11 This is a schematic diagram of suturing the digestive tract lumen in one embodiment of the present invention;
[0027] Figure 12 This is a schematic diagram of the protective bracket fixing in one embodiment of the present utility model;
[0028] Figure 13 This is a schematic diagram of a large piece of material entering the protective bracket in one embodiment of the present invention;
[0029] Figure 14 This is a schematic diagram of a large piece of material passing through an anti-backflow device in one embodiment of the present invention.
[0030] Figure 15 This is a schematic diagram of a large piece of material passing through an anti-backflow device in one embodiment of the present invention;
[0031] In the diagram, 1. Protective support body; 2. Inner upper cover film; 201. First serrated portion of the inner upper cover film; 202. First serrated portion of the inner upper cover film; 203. Third serrated portion of the inner upper cover film; 3. Outer cover film; 4. Inner lower cover film; 401. First serrated portion of the inner lower cover film; 402. Second serrated portion of the inner lower cover film; 403. Third serrated portion of the inner lower cover film; 5. Anti-reflux device; 501. First flap of the anti-reflux device; 502. Second flap of the anti-reflux device; 503. Third flap of the anti-reflux device; 601. Upper lumen of the digestive tract; 602. Lower lumen of the digestive tract; 701. First suture joint; 702. Second suture joint; 703. Third suture joint; 704. Fourth suture joint; 800. Large piece of material; 901. Upper support mold; 902. Lower support mold. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] The purpose of this invention is to provide an anastomosis protection stent to solve the problems existing in the prior art.
[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0035] Example 1:
[0036] This embodiment provides an anastomotic protection stent, such as Figures 1-8 As shown, the device includes a protective support body 1, which has a cylindrical mesh structure. The lower part of the protective support body 1 is equipped with an anti-reflux device 5 that can be opened and closed. The anti-reflux device 5 in this embodiment is mainly used to prevent gastric acid from leaking from the stomach through the anti-reflux device 5 and causing reflux symptoms. Therefore, it can be opened when passing from top to bottom and closed when refluxing from bottom to top. The anti-reflux device 5 has a multi-lobed conical structure. The inner sidewall of the protective support body 1 and the surface of the anti-reflux device are covered with an inner film, and the outer sidewall of the protective support body 1 is covered with an outer film 3.
[0037] As one implementation method, the anti-reflux device 5 is located at the lower 1 / 3 height of the protective support body 1, which can be offset from the anastomosis position and is closer to the stomach, thereby preventing gastric acid from passing through the anastomosis.
[0038] As one implementation method, the anti-backflow device 5 adopts a three-lobed structure; please refer to [reference needed]. Figure 2 These are the first lobe 501, the second lobe 502, and the third lobe 503 of the anti-backflow device, respectively; please refer to... Figure 3 To ensure the stability of each petal, each petal includes four metal wire skeletons to form a stable support. The metal wire skeletons are radially distributed along the center of the protective support body 1, forming a fan-shaped structure.
[0039] As one implementation method, please refer to Figure 5 , 6 The wire skeleton includes a vertical part and an inclined part, with an included angle β of 150°. Of course, in actual use, other angles can be selected arbitrarily within the range of 100°-160°. The included angle α between the inclined part and the side wall of the protective bracket body 1 is 30°. Of course, in actual use, other angles can be selected arbitrarily within the range of 15°-75°.
[0040] As one implementation method, please refer to Figure 2 , 7 8. The inner layer coating includes an upper inner layer coating 2 and a lower inner layer coating 4. The upper part of the upper inner layer coating 2 is rectangular and is bonded to the inner wall of the protective bracket body 1. The lower part of the upper inner layer coating 2 is provided with a first serrated portion 201, a first serrated portion 202, and a third serrated portion 203. The three serrated portions are evenly distributed, of the same size, and are bonded to the upper surface of the three-lobed anti-backflow device 5. Similarly, the lower inner layer coating 4... The lower part of the film 4 is rectangular and is combined with the inner wall of the protective bracket body 1. The upper part of the inner lower film 4 is provided with a first serrated part 401, a second serrated part 402, and a third serrated part 403 of the inner lower film. The three serrated parts are evenly distributed, are of the same size, and are respectively combined with the lower surface of the three-lobed anti-backflow device 5. Through the above structure, the protective bracket body 1 and the anti-backflow device 5 can have a common inner film.
[0041] Example 2:
[0042] This embodiment provides a method for manufacturing the above-mentioned anastomotic protection stent, such as... Figure 9 As shown, it includes the following steps:
[0043] S101. Fabricate the protective bracket body 1; In this embodiment, the protective bracket body 1 is made of woven metal wire, and the metal wire is nickel-titanium alloy wire; Of course, in other embodiments, the protective bracket body 1 can also be made of metal tube by cutting.
[0044] S102. Connect each set of metal wire skeletons inside the protective bracket body 1;
[0045] S103. An inner upper film 2 is wound around the surface of the upper support mold 901. The first serrated part 201, the first serrated part 202, and the third serrated part 203 of the inner upper film are attached to the outer convex conical end face of the upper support mold 901. The protective bracket body 1 is sleeved on the outside of the inner upper film 2, so that each set of metal wire skeletons aligns with each serrated part of the inner upper film 2.
[0046] S104. An inner lower cover film 4 is wound around the surface of the supporting mold 902. The first serrated part 401, the second serrated part 402, and the third serrated part 403 of the inner lower cover film are attached to the concave conical end face of the supporting mold 902. The protective bracket body 1 is sleeved on the outside of the inner lower cover film 4, so that each set of metal wire skeletons aligns with each serrated part of the inner lower cover film 4, thereby completely covering each set of metal wire skeletons.
[0047] The angles of the convex conical end face of the upper support mold 901 and the concave conical end face of the lower support mold 902 are consistent with the angles of each set of wire skeletons, that is, the convex conical end face of the upper support mold 901 and the concave conical end face of the lower support mold 902 are both 60°.
[0048] S105. An outer layer of film 3 is wrapped around the outer surface of the protective bracket body 1;
[0049] S106. Heat shrink tubing is fitted over the outer layer of the outer film 3. The heat shrink tubing is heated to shrink the protective bracket body 1, so that the inner upper film 2 and inner lower film 4 are bonded to the outer film 3 by the shrinkage of the heat shrink tubing, covering the protective bracket body 1, so that an anti-backflow device 5 is formed inside the protective bracket body 1.
[0050] Of course, in other embodiments, the inner upper cover 2, the inner lower cover 4 and the outer cover 3 can also be sewn together by stitching.
[0051] Example 3:
[0052] This embodiment provides a method for using the above-mentioned anastomotic protection stent, such as... Figures 10-12 As shown, it includes the following steps:
[0053] S201. Cut off both ends of the lesion 5-10cm away from the lumen, so that the digestive tract lumen is divided into two disconnected upper digestive tract lumen 601 and lower digestive tract lumen 602. After aligning the anastomoses at both ends of the upper digestive tract lumen 601 and lower digestive tract lumen 602, quickly suture them with sutures to form the first suture interface 701. In this embodiment, the first suture interface 701 is sutured with 3 stitches.
[0054] S202. Under fluoroscopy, the anastomosis protection stent is delivered to the lesion via the oral cavity using an interventional method, so that the anastomosis is located in the middle of the anastomosis protection stent, while the anti-reflux device 5 is moved away from the oral cavity.
[0055] S203. The two ends of the anastomotic protection stent are sutured to the upper lumen 601 and the lower lumen 602 of the digestive tract, respectively, to form a second suture interface 702 and a fourth suture interface 704. In this embodiment, each interface is sutured with 3 stitches. The anastomotic protection stent and the lumen are sutured together again to form a third suture interface 703. In this embodiment, the third suture interface 703 is sutured with 3 stitches. The anastomotic protection stent is fixed to prevent displacement and further prevent anastomotic-related complications.
[0056] like Figures 13-15 As shown, in this embodiment, when the anastomotic protection stent is in use, the first flap 501, the second flap 502, and the third flap 503 of the anti-reflux device do not interfere with each other and can be opened simultaneously or individually. The anti-reflux device 5 is in a closed state without external force. The minimum threshold of external force on the anti-reflux device 5 can be set to at least 1N, at least 1.5N, at least 2N, at least 2.5N, at least 3N, at least 3.5N, at least 4N, at least 4.5N, at least 5N, etc., to ensure that the anti-reflux device 5 will open, so that large pieces of material 800 can enter the stomach through the anti-reflux device 5 during normal digestion.
[0057] Large material 800 enters the esophagus through the mouth and enters the anastomotic protection stent. When it passes through the anti-reflux device 5, the anti-reflux device 5 will open under the external force of the large material 800 during the peristaltic contraction process related to digestion, thus allowing the large material to pass through the anti-reflux device 5 and enter the stomach. Afterward, the anti-reflux device 5 automatically returns to the closed state, so that gastric acid will not leak from the stomach through the anti-reflux device 5, thereby avoiding the symptoms of reflux.
[0058] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. An anastomotic protection stent, characterized in that: The device includes a protective support body (1), which has a cylindrical mesh structure. The lower part of the protective support body (1) is provided with an anti-backflow device (5) that can be opened and closed. The anti-backflow device (5) has a multi-lobed conical structure. The inner sidewall of the protective support body (1) and the surface of the anti-backflow device (5) are covered with an inner layer film, and the outer sidewall of the protective support body (1) is covered with an outer layer film (3).
2. The anastomosis protector stent of claim 1, wherein: The anti-backflow device (5) is located at the lower 1 / 3 height of the main body (1) of the protective bracket.
3. The anastomotic stricture support according to claim 1, characterized in that: The anti-backflow device (5) adopts a three-lobed structure, each lobe including at least 3 metal wire skeletons, which are radially distributed along the center of the protective support body (1).
4. The anastomotic stricture support according to claim 3, characterized in that: The wire skeleton includes a vertical part and an inclined part. The angle between the vertical part and the inclined part is 100°-160°, and the angle between the inclined part and the side wall of the protective bracket body (1) is 15°-75°.
5. The anastomotic stricture support according to claim 3, characterized in that: The inner layer coating includes an upper inner layer coating (2) and a lower inner layer coating (4). The upper part of the upper inner layer coating (2) is rectangular and is bonded to the inner wall of the protective bracket body (1). The lower part of the upper inner layer coating (2) is provided with three serrated parts, which are bonded to the upper surface of the three-lobed anti-backflow device (5). The lower part of the lower inner layer coating (4) is rectangular and is bonded to the inner wall of the protective bracket body (1). The upper part of the lower inner layer coating (4) is provided with three serrated parts, which are bonded to the lower surface of the three-lobed anti-backflow device (5).