A two-layer ostomy pouch

Abstract

This invention provides a double-layer ostomy bag, belonging to the field of medical device technology. The double-layer ostomy bag includes: an outer bag body, an inner bag body, a connecting ring, a sealing cap, and a discharge valve. The outer bag body is flat and has an open end and a closed end, and is made of medical-grade polyethylene. The inner bag body is disposed inside the outer bag body, and the inner bag body and the outer bag body share the same opening. The connecting ring is disposed at the open ends of the outer bag body and the inner bag body. The connecting ring has a ring structure, and an annular protrusion is provided on the outer circumference of the annular structure. The annular protrusion has multiple slots. The sealing cap cooperates with the connecting ring, and the inner edge of the sealing cap has a latch that cooperates with the slots. The discharge valve is disposed at the closed end of the outer bag body, and the discharge valve includes a valve body and a valve plug. This invention can solve the problem of obvious odor in existing ostomy bags.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically, it relates to a double-layer ostomy bag. Background Technology

[0002] Ostomy is a common surgical procedure used in clinical practice, primarily in the treatment of diseases such as colon cancer, rectal cancer, and inflammatory bowel disease. It involves creating an artificial opening (ostomy) in the abdominal wall to drain intestinal contents out of the body. Current ostomy bags are mainly single-layered structures, typically consisting of a plastic bag body and a connecting device that connects the bag body to the stoma in the abdominal wall.

[0003] This single-layer ostomy bag presents several problems in clinical application: First, its sealing performance is poor, making it prone to leakage during activities, leading to soiling of clothing and skin with excrement, causing embarrassment and inconvenience to patients; second, the single-layer structure cannot effectively isolate the odor from the excrement, resulting in a noticeable odor that affects patients' social activities and mental health; third, the excrement directly contacts the inner wall of the bag, easily causing skin irritation and allergic reactions, and long-term use may lead to skin damage around the stoma; fourth, traditional ostomy bags make it difficult to observe the contents, and patients find it hard to determine when to empty or replace them; fifth, the drainage mechanism is not convenient enough, the operation is complicated, or the entire ostomy bag needs to be replaced frequently, increasing medical waste and usage costs.

[0004] Existing single-layer ostomy bags suffer from poor sealing, easy leakage, noticeable odor, severe skin irritation, and difficulty in observation and drainage, leading to a decline in patients' quality of life, increased psychological burden, and increased workload for nursing staff. These problems mainly stem from the simple structure of traditional ostomy bags, which fail to effectively separate solid and fluid components, have an insufficiently secure connection to the stoma, resulting in incomplete sealing, and lack convenient drainage mechanisms and means of observing the contents. Utility Model Content

[0005] In view of this, the present invention provides a double-layer ostomy bag that can solve the problem of obvious odor in existing ostomy bags.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a double-layer ostomy bag, comprising: an outer bag body, an inner bag body, a connecting ring, a sealing cap, and a discharge valve; the outer bag body is flat and has an open end and a closed end, and is made of medical-grade polyethylene; the inner bag body is disposed inside the outer bag body, and the inner bag body and the outer bag body share the same opening; the connecting ring is disposed at the open end of the outer bag body and the inner bag body, and the connecting ring has an annular structure, with an annular protrusion on the outer circumference of the annular structure, and multiple slots on the annular protrusion; the sealing cap cooperates with the connecting ring, and the inner edge of the sealing cap has a latch that cooperates with the slots; the discharge valve is disposed at the closed end of the outer bag body, and the discharge valve includes a valve body and a valve plug, the valve body is fixedly connected to the closed end of the outer bag body, and the valve plug is threadedly connected to the valve body.

[0008] The technical advantages of the double-layer ostomy bag provided by this utility model are as follows: By setting a double-layer structure of an outer bag and an inner bag, effective isolation and stratified collection of the contents of the ostomy bag are achieved, reducing the risk of odor penetration and skin irritation; the design of the connecting ring ensures a stable connection between the outer and inner bag and the stoma, and the annular protrusion and groove structure improves the tightness of the fit between the sealing cap and the connecting ring; the setting of the discharge valve allows the contents of the ostomy bag to be discharged periodically without replacing the entire ostomy bag, greatly improving the convenience and economy of use, while the threaded connection design between the valve plug and the valve body ensures the sealing and safety of the discharge process.

[0009] Based on the above technical solution, the double-layer ostomy bag of this utility model can be further improved as follows:

[0010] The connecting ring is made of rigid plastic and has a "T"-shaped cross-section. The horizontal portion of the "T" shape is heat-sealed to the openings of the outer and inner bags, while the vertical portion of the "T" shape extends outward to form the annular protrusion. The outer surface of the annular protrusion has an annular groove, and an elastic sealing ring made of medical-grade silicone is provided within the groove. Multiple slots on the annular protrusion are evenly distributed along the circumference, with the opening of each slot facing the axial direction of the connecting ring. The internal shape of each slot is a dovetail groove structure to enhance the locking effect of the latch.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the connecting ring adopts a "T"-shaped cross-section design, which enhances the structural strength; the heat-sealing connection between the transverse part and the outer and inner bag bodies ensures the firmness of the connection; the elastic sealing ring in the annular groove improves the sealing effect between the ostomy bag and human skin, effectively preventing leakage of contents and the spread of odor; the slot adopts a dovetail groove structure, which forms a more stable locking mechanism with the latch, ensuring that the sealing cap will not fall off accidentally during use, and also making it easy for users to open when needed, thus improving the safety and convenience of the product.

[0012] Furthermore, the sealing cap includes a cap body and a sealing gasket. The cap body is disc-shaped, with a conical reinforcing rib protruding outward from the central area of ​​the cap body. The conical reinforcing ribs are radially distributed from the center of the cap body outward. The sealing gasket is fixedly connected to the inner side of the cap body, and the sealing gasket is made of medical-grade silicone material. The latch is disposed on the inner circumferential side of the cap body. The latch is L-shaped, with the short side of the L-shape perpendicular to the inner side of the cap body and the long side of the L-shape parallel to the inner side of the cap body and facing the center of the cap body. When the sealing cap is engaged with the connecting ring, the long side of the latch is inserted into the dovetail groove structure of the latch.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the disc-shaped design of the sealing cap and the conical radial reinforcing rib structure enhance the overall rigidity of the cap body and prevent deformation caused by external forces during use; the silicone sealing gasket provides good sealing performance and adapts to the irregular curved surface of human skin; the "L"-shaped latch design enables the sealing cap and the connecting ring to form a firm mechanical lock. When the long side of the latch is inserted into the dovetail groove structure of the groove, a two-way locking effect is formed, which prevents both axial separation and radial sliding, greatly improving the sealing reliability and user safety.

[0014] Furthermore, the inner bag body is made of an anti-adhesion material, and the bottom of the inner bag body has a crease line in the shape of a "V", with the apex of the "V" pointing towards the center of the bottom of the inner bag body; multiple micropores are evenly distributed on the side wall of the inner bag body, and the diameter of the micropores is 0.5 mm to 1.0 mm; the height of the inner bag body is less than the height of the outer bag body, so that a liquid collection cavity is formed between the bottom of the inner bag body and the bottom of the outer bag body, and the liquid collection cavity is connected to the inner bag body through the micropores.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the inner bag body is made of anti-adhesion material, which reduces the adhesion of ostomy excrement to the inner wall of the bag, making it easier to clean and discharge; the "V" shaped crease line design at the bottom guides the contents to gather towards the center, making it easier to completely empty; the micropores evenly distributed on the side wall allow the liquid part to permeate to the outer bag body, while the solid part is effectively blocked by the inner bag body, realizing solid-liquid separation; the height of the inner bag body is smaller than that of the outer bag body, which increases the liquid storage space, extends the service life of the ostomy bag, and reduces the replacement frequency.

[0016] Furthermore, an observation window is provided in the center of the front side of the outer bag. The observation window is made of transparent material and its area occupies 1 / 3 to 1 / 2 of the area of ​​the front side of the outer bag. The periphery of the observation window is connected to the outer bag by a heat sealing process. The observation window is elliptical in shape, and the major axis of the ellipse is perpendicular to the longitudinal center line of the outer bag. The surface of the observation window is provided with an anti-fog coating to prevent water vapor from condensing on the surface of the observation window and affecting observation.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the transparent observation window on the front side of the outer bag allows users to intuitively monitor the contents of the ostomy bag, making it easy to determine in a timely manner whether drainage or replacement is needed; the elliptical design of the observation window provides a wider field of view, and its long axis being perpendicular to the longitudinal center line of the outer bag maximizes the observation area; the heat sealing process ensures a firm connection and airtightness between the observation window and the outer bag; the anti-fog coating effectively prevents moisture from condensing on the surface of the observation window, ensuring clear observation in various usage environments and improving the practicality of the product and user experience.

[0018] Furthermore, the discharge valve includes a valve body, a valve plug, and a sealing gasket. The valve body is cylindrical, with one end thermally connected to the closed end of the outer bag body, and the other end of the valve body having an internal thread. The valve plug is cylindrical, with an external thread on its outer circumference that mates with the internal thread of the valve body. The end of the valve plug has a hexagonal protrusion for assisting in rotating the valve plug. The sealing gasket is disposed between the valve plug and the valve body, and is made of an elastic material to enhance the sealing performance of the discharge valve.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the discharge valve adopts a combination design of cylindrical valve body and cylindrical valve plug, which provides a simple and efficient sealing mechanism; the internal and external thread fit makes the connection between valve plug and valve body more secure, preventing accidental loosening during use; the hexagonal protrusion at the end of valve plug provides a convenient manual operation interface, which can be easily rotated even when hands are slippery or insufficient strength; the sealing gasket made of elastic material enhances the sealing performance of threaded connection, effectively preventing leakage of contents and diffusion of odor, and improving user comfort and safety.

[0020] Furthermore, the back of the outer bag body is provided with a multi-layer fixing structure, which includes a base plate layer, an adhesive layer, and a protective layer. The base plate layer is fixedly connected to the back of the outer bag body and is made of flexible plastic material. The center of the base plate layer has a circular opening corresponding to the connecting ring. The adhesive layer is located on the side of the base plate layer away from the outer bag body and is made of medical-grade adhesive material. The protective layer covers the adhesive layer and is a peelable silicone paper. The outer edge of the base plate layer is bent inward to form an annular fold, the width of which is 5 mm to 10 mm, to enhance the structural strength of the base plate layer.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the multi-layer fixing structure on the back of the outer bag provides a safe and reliable connection between the ostomy bag and the human skin; the base plate layer made of flexible plastic material can adapt to the curvature of the human body, improving wearing comfort; the adhesive layer of medical-grade adhesive material ensures sufficient adhesion strength without causing skin irritation; the peelable silicone paper protective layer protects the adhesive layer's stickiness before use; the annular fold on the outer edge of the base plate layer enhances the structural rigidity of the base plate layer, preventing deformation or curling during use, while also reducing pressure on the skin and improving comfort during long-term wear.

[0022] Furthermore, a reinforcing rib is provided between the outer bag body and the inner bag body. The reinforcing rib is in the form of a grid, and the grid-shaped reinforcing rib is formed by multiple vertical reinforcing strips and multiple horizontal reinforcing strips interlaced. One end of the vertical reinforcing strip is fixedly connected to the bottom of the connecting ring, and the other end is fixedly connected to the inner wall of the closed end of the outer bag body. The two ends of the horizontal reinforcing strip are respectively fixedly connected to the inner side of the left and right side walls of the outer bag body. The reinforcing rib is made of elastic material, and the thickness of the reinforcing rib is 0.5 mm to 1.5 mm. The reinforcing rib is used to maintain the distance between the outer bag body and the inner bag body.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the grid-like reinforcing rib structure effectively maintains an appropriate distance between the outer bag and the inner bag, preventing them from sticking together or deforming during use; the staggered design of vertical and horizontal reinforcing strips forms a three-dimensional support network, enhancing the structural stability of the entire ostomy bag; the selection of elastic materials allows the reinforcing ribs to maintain their supporting function while having a certain degree of deformation adaptability, enabling them to appropriately expand the space according to the increase of contents; the reasonable thickness design of the reinforcing ribs ensures support strength without adding too much weight, improving the user's ease of wear and comfort.

[0024] Furthermore, the outer circumferential surface of the connecting ring is provided with a pointing positioning structure, which includes a raised mark and a corresponding groove. The raised mark is located at the upper part of the connecting ring and is triangular in shape, with the vertex of the triangle pointing radially towards the connecting ring. The groove is located at the outer edge of the sealing cover, and the shape of the groove matches the raised mark. When the sealing cover and the connecting ring are correctly aligned, the raised mark is embedded in the groove. The raised mark and the groove are visually distinguished by color difference to assist the user in correctly aligning the sealing cover and the connecting ring.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the directional positioning structure on the connecting ring provides users with intuitive and clear visual and tactile guidance, helping to correctly align the sealing cap with the connecting ring; the matching design of the triangular raised mark and the corresponding groove forms a physical locking mechanism, ensuring that the sealing cap is installed in the correct position; the visual distinction of color difference enhances the ease of operation in low-light conditions; this positioning design is particularly suitable for users with poor eyesight or limited hand function, greatly reducing the difficulty of use, improving the universality and accessibility of the product, and enabling all types of users to easily and correctly operate the ostomy bag.

[0026] Furthermore, the opening end of the inner bag body is provided with a flange structure, the width of which is 8 mm to 12 mm, and the flange structure is evenly distributed along the circumference of the opening of the inner bag body; the flange structure of the inner bag body is fixedly connected to the opening end of the outer bag body by a heat sealing process, so that the inner bag body and the outer bag body are connected to the connecting ring together; the inner surface of the flange structure of the inner bag body is coated with a hydrophilic coating, which is used to enhance the comfort of the inner bag body in contact with the skin; a gravity guiding structure is provided at the bottom center of the inner bag body, the gravity guiding structure is funnel-shaped, and the diameter of the funnel-shaped structure gradually decreases from top to bottom, which is used to guide the contents to converge towards the discharge valve.

[0027] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the flanged structure at the opening end of the inner bag enhances the connection stability with the outer bag and connecting ring, preventing the inner bag from detaching during use; the heat sealing process ensures the firmness and sealing of the connection; the hydrophilic coating enhances the comfort of the skin contact area, reducing friction and irritation; the funnel-shaped gravity guiding structure at the bottom center utilizes the principle of gravity to effectively guide the contents towards the discharge valve, facilitating complete emptying, reducing residue, and improving cleaning efficiency and hygiene; this design is particularly suitable for bedridden patients, ensuring effective emptying of the ostomy bag even in non-ideal positions.

[0028] Compared with existing technologies, the beneficial effects of the double-layer ostomy bag provided by this utility model are as follows: The double-layer ostomy bag of this utility model effectively solves the core problems in existing technologies through its innovative double-layer structural design. The combined structure of the outer and inner bag bodies achieves effective solid-liquid separation. The anti-adhesion material and microporous design of the inner bag body prevent solid waste from entering the inner bag, while the liquid portion permeates through the micropores to the collection chamber of the outer bag body, greatly reducing odor diffusion and skin irritation. The "T"-shaped design of the connecting ring and the dovetail groove buckle mechanism provide a stable mechanical connection, and the elastic sealing ring enhances the sealing effect with the skin, effectively preventing leakage. The transparent observation window allows users to monitor the contents at any time and promptly determine the need for discharge or replacement. The threaded connection design and sealing gasket of the discharge valve ensure the safety and sealing of the discharge process. The mesh-like reinforcing ribs maintain the structural stability of the double-layer bag body, and the directional positioning structure simplifies the operation steps and improves ease of use. The multi-layer fixing structure and hydrophilic coating enhance wearing comfort, and the funnel-shaped guiding structure optimizes discharge efficiency. These innovative designs significantly improve the quality of life and mental health of ostomy patients, while also simplifying the workflow for nursing staff, demonstrating significant practical value and social benefits. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0030] Figure 1 A front view of a double-layered ostomy bag;

[0031] Figure 2 A rear view of a double-layered ostomy bag;

[0032] Figure 3 A cross-sectional view of a double-layered ostomy bag;

[0033] Figure 4 Here is a schematic diagram of the structure of A;

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 10. Outer bag body; 11. Observation window; 12. Multi-layer fixing structure; 121. Bottom plate layer; 122. Adhesive layer; 123. Protective layer; 20. Inner bag body; 21. Reinforcing rib; 22. Directional positioning structure; 30. Connecting ring; 31. Annular protrusion; 311. Slot; 40. Sealing cap; 41. Tongue; 42. Cover body; 43. Sealing gasket; 50. Drain valve; 60. Liquid collection chamber. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0037] like Figure 1-4 The illustration shows an embodiment of a double-layer ostomy bag provided by this utility model. In this embodiment, it includes: an outer bag body 10, an inner bag body 20, a connecting ring 30, a sealing cap 40, and a discharge valve 50. The outer bag body is flat and has an open end and a closed end. The outer bag body is made of medical-grade polyethylene. The inner bag body is located inside the outer bag body and shares the same opening with the outer bag body. The connecting ring is located at the open end of the outer bag body and the inner bag body. The connecting ring has an annular structure. An annular protrusion 31 is provided on the outer circumference of the annular structure. Multiple slots 311 are provided on the annular protrusion. The sealing cap cooperates with the connecting ring. The inner edge of the sealing cap has a latch 41 that cooperates with the slots. The discharge valve is located at the closed end of the outer bag body. The discharge valve includes a valve body and a valve plug. The valve body is fixedly connected to the closed end of the outer bag body, and the valve plug is connected to the valve body by threads.

[0038] In the aforementioned technical solution, the connecting ring is made of rigid plastic material, and its cross-section is T-shaped. The horizontal part of the T-shape is heat-sealed to the opening ends of the outer and inner bags, while the vertical part of the T-shape extends outward to form an annular protrusion. The outer surface of the annular protrusion has an annular groove, and an elastic sealing ring made of medical-grade silicone material is installed inside the annular groove. Multiple slots on the annular protrusion are evenly distributed along the circumference, with the opening of each slot facing the axial direction of the connecting ring. The internal shape of the slot is a dovetail groove structure to enhance the locking effect of the latch.

[0039] Furthermore, in the above technical solution, the sealing cover includes a cover body 42 and a sealing gasket 43. The cover body is disc-shaped, and the central area of ​​the cover body protrudes outward to form a conical reinforcing rib. The conical reinforcing rib is radially distributed from the center of the cover body to the periphery. The sealing gasket is fixedly connected to the inner side of the cover body, and the material of the sealing gasket is medical-grade silicone. The latch is set in the inner circumferential direction of the cover body. The latch is "L"-shaped, with the short side of the "L" shape perpendicular to the inner side of the cover body and the long side of the "L" shape parallel to the inner side of the cover body and facing the center of the cover body. When the sealing cover is engaged with the connecting ring, the long side of the latch is inserted into the dovetail groove structure of the latch groove.

[0040] Furthermore, in the above technical solution, the inner bag body is made of an anti-adhesion material, and the bottom of the inner bag body is provided with a crease line in the shape of a "V", with the apex of the "V" pointing towards the center of the bottom of the inner bag body; multiple micropores are evenly distributed on the side wall of the inner bag body, with the diameter of the micropores ranging from 0.5 mm to 1.0 mm; the height of the inner bag body is less than the height of the outer bag body, so that a liquid collection cavity 60 is formed between the bottom of the inner bag body and the bottom of the outer bag body, and the liquid collection cavity is connected to the inner bag body through the micropores.

[0041] Furthermore, in the above technical solution, an observation window 11 is provided in the middle of the front side of the outer bag body. The observation window is made of transparent material, and its area accounts for 1 / 3 to 1 / 2 of the area of ​​the front side of the outer bag body. The periphery of the observation window is connected to the outer bag body by a heat sealing process. The shape of the observation window is elliptical, and the major axis of the ellipse is perpendicular to the longitudinal center line of the outer bag body. The surface of the observation window is provided with an anti-fog coating to prevent water vapor from condensing on the surface of the observation window and affecting observation.

[0042] Furthermore, in the above technical solution, the discharge valve includes a valve body, a valve plug, and a sealing gasket. The valve body is cylindrical, with one end of the valve body heat-sealed to the closed end of the outer bag body, and the other end of the valve body is provided with an internal thread. The valve plug is cylindrical, with an external thread on the outer circumference of the valve plug that mates with the internal thread of the valve body. The end of the valve plug is provided with a hexagonal protrusion, which is used to assist in rotating the valve plug. The sealing gasket is disposed between the valve plug and the valve body, and the sealing gasket is made of elastic material to enhance the sealing performance of the discharge valve.

[0043] Furthermore, in the above technical solution, the back of the outer bag is provided with a multi-layer fixing structure 12, which includes a bottom plate layer 121, an adhesive layer 122, and a protective layer 123. The bottom plate layer is fixedly connected to the back of the outer bag and is made of flexible plastic material. The bottom plate layer has a circular opening in the center corresponding to the connecting ring. The adhesive layer is located on the side of the bottom plate layer away from the outer bag and is made of medical-grade adhesive material. The protective layer covers the adhesive layer and is a peelable silicone paper. The outer edge of the bottom plate layer is bent inward to form an annular fold, the width of which is 5 mm to 10 mm, to enhance the structural strength of the bottom plate layer.

[0044] Furthermore, in the above technical solution, a reinforcing rib 21 is provided between the outer bag body and the inner bag body. The reinforcing rib is in the form of a grid, and the grid-shaped reinforcing rib is formed by multiple vertical reinforcing strips and multiple horizontal reinforcing strips interlaced. One end of the vertical reinforcing strip is fixedly connected to the bottom of the connecting ring, and the other end is fixedly connected to the inner wall of the closed end of the outer bag body. The two ends of the horizontal reinforcing strip are respectively fixedly connected to the inner side of the left and right side walls of the outer bag body. The reinforcing rib is made of elastic material, and the thickness of the reinforcing rib is 0.5 mm to 1.5 mm. The reinforcing rib is used to maintain the distance between the outer bag body and the inner bag body.

[0045] Furthermore, in the above technical solution, a pointing positioning structure 22 is provided on the outer peripheral surface of the connecting ring. The pointing positioning structure includes a raised mark and a corresponding groove. The raised mark is located at the upper part of the connecting ring and is triangular in shape, with the vertex of the triangle pointing radially towards the connecting ring. The groove is located on the outer edge of the sealing cover, and the shape of the groove matches the raised mark. When the sealing cover and the connecting ring are correctly aligned, the raised mark is embedded in the groove. The raised mark and the groove are visually distinguished by color difference to assist the user in correctly aligning the sealing cover and the connecting ring.

[0046] Furthermore, in the above technical solution, the opening end of the inner bag body is provided with a flange structure, the width of which is 8 mm to 12 mm, and the flange structure is evenly distributed along the circumference of the opening of the inner bag body; the flange structure of the inner bag body is fixedly connected to the opening end of the outer bag body by a heat sealing process, so that the inner bag body and the outer bag body are connected to the connecting ring together; the inner side of the flange structure of the inner bag body is coated with a hydrophilic coating, which is used to enhance the comfort of the inner bag body in contact with the skin; a gravity guiding structure is provided at the bottom center of the inner bag body, which is funnel-shaped and the diameter of the funnel-shaped structure gradually decreases from top to bottom, and is used to guide the contents to converge towards the discharge valve.

[0047] When using this double-layer ostomy bag, first clean the skin around the stoma and ensure it is dry. Then, peel off the protective layer on the bottom layer adhesive layer. Align the circular opening in the center of the connecting ring with the stoma location on the abdominal wall and gently press the bottom layer to ensure it adheres fully to the skin, taking care to avoid wrinkles or air bubbles. After adhesion, check that the connecting ring is securely fixed and ensure the inner bag is correctly unfolded inside the outer bag. If using the sealing cap, align the groove on the sealing cap with the raised mark on the connecting ring, then gently press the sealing cap to insert the "L"-shaped latch into the dovetail groove of the connecting ring until a slight "click" is heard, indicating that the sealing cap is correctly locked. During daily use, monitor the contents of the ostomy bag through the observation window. When the contents reach one-half to two-thirds of the bag's capacity, it should be drained. To drain, place the ostomy bag bottom down and slowly rotate the valve plug of the drain valve (the hexagonal protrusion can be used to increase ease of operation). After opening the drain valve, allow the contents to flow into a suitable container. After drainage, flush the drainage valve with clean water or a special cleaning solution, then retighten the valve plug to ensure a seal. If the entire ostomy bag needs to be replaced, first empty the contents, then gently peel back the bottom layer from the skin edge while gently pressing the skin with your other hand to reduce discomfort. After removing the old ostomy bag, immediately clean and check the skin around the stoma. If irritation or discomfort occurs, consult a healthcare professional. This double-layered ostomy bag can generally be used continuously for 2-3 days, but the specific replacement time should be determined based on individual circumstances and medical advice. If any leakage, significantly increased odor, or skin discomfort is observed, replace it immediately.

[0048] The following is a specific embodiment of this utility model:

[0049] This embodiment provides a double-layered ostomy bag, mainly comprising five components: an outer bag body, an inner bag body, a connecting ring, a sealing cap, and a discharge valve. The outer bag body is made of medical-grade polyethylene material with a thickness of 0.08 mm to 0.12 mm. It is flat and bag-shaped, with a length of 250 mm to 300 mm and a width of 150 mm to 180 mm, exhibiting good flexibility and appropriate strength. The opening diameter of the outer bag body is 60 mm to 80 mm, adapted to the size of the human ostomy opening; the closed end is equipped with a discharge valve for periodic drainage of contents. An elliptical transparent observation window is located in the center of the front side of the outer bag body, with a major axis of 100 mm and a minor axis of 70 mm. It is made of medical-grade transparent polyvinyl chloride material with a thickness of 0.15 mm and coated with an anti-fog coating. It is connected to the outer bag body via a heat-sealing process with a heat-sealing width of 3 mm to ensure sealing performance. The inner bag is made of medical-grade anti-adhesive polytetrafluoroethylene material, with a thickness of 0.06 mm to 0.08 mm and a length of 220 mm to 250 mm, slightly smaller than the outer bag. The sidewalls of the inner bag have 120 micropores evenly distributed, each with a diameter of 0.8 mm and a spacing of 10 mm, arranged in a grid pattern.

[0050] The bottom of the inner bag features a "V"-shaped crease with a 60-degree angle and a depth of 0.5 mm, designed to guide the contents towards the center. The opening of the inner bag has a 10 mm wide flange, the inside of which is coated with a hydrophilic polyvinyl alcohol material to enhance comfort against the skin. A funnel-shaped gravity-guided structure is located at the center of the bottom of the inner bag, with an upper diameter of 30 mm, a lower diameter of 15 mm, and a length of 20 mm. The connecting ring is made of medical-grade polycarbonate, with an outer diameter of 90 mm, an inner diameter of 65 mm, and a thickness of 5 mm. The connecting ring has a "T"-shaped cross-section; the horizontal portion of the "T" is 8 mm wide and 2 mm thick, heat-sealed to the openings of the outer and inner bags; the vertical portion of the "T" is 3 mm high and 5 mm wide, extending outwards to form a ring-shaped protrusion.

[0051] The annular protrusion has an annular groove 2 mm wide and 1.5 mm deep on its outer surface. Inside the groove is an elastic sealing ring made of medical-grade silicone material, with a cross-sectional diameter of 2 mm. The annular protrusion has 12 slots evenly distributed along its circumference. Each slot is 5 mm wide and 3 mm deep, forming a dovetail structure with an opening width of 3 mm and an internal width of 5 mm. A triangular raised mark is located on the upper part of the connecting ring. The triangle has a base length of 6 mm and a height of 4 mm, and is red in color, used for visually assisted positioning.

[0052] The sealing cap, made of the same polycarbonate material, is disc-shaped with a diameter of 85 mm and a thickness of 3 mm. Eight radial conical reinforcing ribs bulge outwards from the center of the cap, each rib being 30 mm long, 5 mm wide at the base, and 2 mm high. A 1.5 mm thick medical-grade silicone sealing gasket is fixedly attached to the inner side of the sealing cap. The inner edge of the sealing cap has 12 "L"-shaped latches corresponding to the connecting ring slots; the shorter side of each "L" is 3 mm long, the longer side is 5 mm long, and the thickness is 1.5 mm. The outer edge of the sealing cap has red grooves that match the raised markings on the connecting ring for easy alignment and installation.

[0053] The discharge valve is located at the center of the closed end of the outer bag and includes a valve body, a valve plug, and a sealing gasket. The valve body is cylindrical, made of medical-grade polypropylene, 20 mm long, 25 mm outer diameter, and 15 mm inner diameter. One end is heat-sealed to the outer bag with a heat-sealing width of 5 mm; the other end has a standard M15×1.5 internal thread on its inner wall, with a thread length of 10 mm. The valve plug is cylindrical, made of the same polypropylene material, 18 mm long, and 15 mm outer diameter. Its outer circumference has external threads that mate with the internal thread of the valve body. The end of the valve plug has a hexagonal protrusion with a side length of 10 mm and a height of 5 mm to assist in rotational operation. The sealing gasket, made of medical-grade silicone, is located between the valve plug and the valve body, 2 mm thick, with an outer diameter of 15 mm and an inner diameter of 12 mm.

[0054] A mesh-like reinforcing rib, made of medical-grade elastic polyester material with a thickness of 1 mm, is provided between the outer and inner bag bodies. It consists of 10 vertical reinforcing ribs and 8 horizontal reinforcing ribs arranged in an alternating pattern. The vertical reinforcing ribs are 240 mm long and 3 mm wide; the horizontal reinforcing ribs are 140 mm long and 3 mm wide.

[0055] The multi-layered fixing structure on the back of the outer bag includes a base layer, an adhesive layer, and a protective layer. The base layer is made of medical-grade flexible polyurethane material, 0.5 mm thick, with an outer diameter of 120 mm and a central circular opening of 65 mm in diameter. The outer edge of the base layer is bent inward to form an 8 mm wide annular fold, enhancing structural strength. The adhesive layer is made of medical-grade hydrocolloid material, 1 mm thick, offering excellent adhesion and skin-friendliness. The protective layer is silicone-treated release paper, 0.1 mm thick, for easy removal and use. This embodiment features a rationally designed double-layered ostomy bag structure, scientifically selected materials, and precisely calculated dimensions for each component, ensuring the product's effectiveness and comfort, making it particularly suitable for patients requiring long-term ostomy bag use.

[0056] Specifically, the principle of this utility model is as follows: The double-layer ostomy bag of this utility model is based on the technical principles of solid-liquid separation and multi-stage sealing, solving the problems existing in traditional ostomy bags through innovative structural design. First, the outer bag and inner bag form a double-layer collection system. The inner bag is made of anti-adhesion material, with micropores on the side walls and a "V"-shaped crease line at the bottom. This structure allows solid waste to be retained in the inner bag, while liquid components permeate through the micropores into the collection chamber of the outer bag, achieving effective solid-liquid separation and reducing odor and skin irritation. Second, the connecting ring adopts a "T"-shaped cross-section design. The horizontal part is heat-sealed to the bag body, and the vertical part forms an annular protrusion with an internal elastic sealing ring, which, together with the sealing cap, forms a multi-stage sealing system. The "L"-shaped latch on the sealing cap and the dovetail groove of the connecting ring form a mechanical lock to prevent accidental detachment, while the pointing positioning structure ensures correct installation. Third, the discharge valve adopts a threaded connection principle. Through the precise fit between the valve plug and the valve body and the auxiliary sealing of the sealing gasket, the safety and ease of operation of the discharge process are ensured. Fourth, the mesh-like reinforcing ribs utilize the principle of mechanical structural support to maintain an appropriate distance between the outer and inner bag bodies, preventing deformation and adhesion. Fifth, the multi-layered fixing structure and hydrophilic coating, based on ergonomic principles, improve wearing comfort and adaptability. Sixth, the funnel-shaped gravity guiding structure utilizes the principle of gravity to allow the contents to naturally converge at the discharge valve, facilitating complete emptying. Through the comprehensive application of these technical principles, this invention fundamentally solves the core problems of traditional ostomy bags, achieving structural optimization and functional improvement.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A double-layered ostomy bag, characterized in that, include: The system comprises an outer bag body, an inner bag body, a connecting ring, a sealing cap, and a discharge valve. The outer bag body is flat and has an open end and a closed end. The outer bag body is made of medical-grade polyethylene. The inner bag body is located inside the outer bag body and shares the same opening with the outer bag body. The connecting ring is located at the open ends of the outer and inner bag bodies. The connecting ring has a ring structure with an annular protrusion on its outer circumference and multiple slots on the annular protrusion. The sealing cap mates with the connecting ring, and the inner edge of the sealing cap has a latch that mates with the slots. The discharge valve is located at the closed end of the outer bag body. The discharge valve includes a valve body and a valve plug. The valve body is fixedly connected to the closed end of the outer bag body, and the valve plug is threadedly connected to the valve body.

2. The double-layered ostomy bag according to claim 1, characterized in that, The connecting ring is made of rigid plastic material, and its cross-section is T-shaped. The horizontal part of the T-shape is heat-sealed to the opening ends of the outer bag and the inner bag, and the vertical part of the T-shape extends outward to form the annular protrusion. The outer surface of the annular protrusion is provided with an annular groove, and an elastic sealing ring is provided in the annular groove. The elastic sealing ring is made of medical-grade silicone material. Multiple slots on the annular protrusion are evenly distributed along the circumference, and the opening of each slot faces the axial direction of the connecting ring. The internal shape of the slot is a dovetail groove structure to enhance the locking effect of the latch.

3. A double-layered ostomy bag according to claim 2, characterized in that, The sealing cap includes a cap body and a sealing gasket. The cap body is disc-shaped, with a conical reinforcing rib protruding outward from the central area of ​​the cap body. The conical reinforcing ribs are radially distributed from the center of the cap body outward. The sealing gasket is fixedly connected to the inner side of the cap body and is made of medical-grade silicone material. The latch is located on the inner circumferential side of the cap body. The latch is L-shaped, with the short side of the L-shape perpendicular to the inner side of the cap body and the long side of the L-shape parallel to the inner side of the cap body and facing the center of the cap body. When the sealing cap is engaged with the connecting ring, the long side of the latch is inserted into the dovetail groove structure of the latch.

4. A double-layered ostomy bag according to claim 3, characterized in that, The inner bag is made of an anti-adhesive material. A crease line is provided at the bottom of the inner bag, forming a "V" shape, with the apex of the "V" pointing towards the center of the bottom of the inner bag. Multiple micropores are evenly distributed on the sidewalls of the inner bag, with a diameter of 0.5 mm to 1.0 mm. The height of the inner bag is less than the height of the outer bag, creating a liquid collection cavity between the bottom of the inner bag and the bottom of the outer bag. This liquid collection cavity communicates with the inner bag through the micropores.

5. A double-layered ostomy bag according to claim 4, characterized in that, An observation window is provided in the center of the front side of the outer bag. The observation window is made of transparent material and its area occupies 1 / 3 to 1 / 2 of the area of ​​the front side of the outer bag. The periphery of the observation window is connected to the outer bag by a heat sealing process. The observation window is elliptical in shape, and the major axis of the ellipse is perpendicular to the longitudinal center line of the outer bag. The surface of the observation window is provided with an anti-fog coating to prevent water vapor from condensing on the surface of the observation window and affecting observation.

6. A double-layered ostomy bag according to claim 5, characterized in that, The discharge valve includes a valve body, a valve plug, and a sealing gasket. The valve body is cylindrical, with one end heat-sealed to the closed end of the outer bag body, and the other end of the valve body having an internal thread. The valve plug is cylindrical, with an external thread on its outer circumference that mates with the internal thread of the valve body. The end of the valve plug has a hexagonal protrusion for assisting in rotating the valve plug. The sealing gasket is disposed between the valve plug and the valve body, and is made of an elastic material to enhance the sealing performance of the discharge valve.

7. A double-layered ostomy bag according to claim 6, characterized in that, The back of the outer bag has a multi-layer fixing structure, which includes a base plate layer, an adhesive layer, and a protective layer. The base plate layer is fixedly connected to the back of the outer bag and is made of flexible plastic material. The center of the base plate layer has a circular opening corresponding to the connecting ring. The adhesive layer is located on the side of the base plate layer away from the outer bag and is made of medical-grade adhesive material. The protective layer covers the adhesive layer and is a peelable silicone paper. The outer edge of the base plate layer is bent inward to form an annular fold, the width of which is 5 mm to 10 mm, to enhance the structural strength of the base plate layer.

8. A double-layered ostomy bag according to claim 7, characterized in that, A reinforcing rib is provided between the outer bag body and the inner bag body. The reinforcing rib is in the form of a grid, which is formed by multiple vertical reinforcing strips and multiple horizontal reinforcing strips interlacing. One end of each vertical reinforcing strip is fixedly connected to the bottom of the connecting ring, and the other end is fixedly connected to the inner wall of the closed end of the outer bag body. Both ends of each horizontal reinforcing strip are fixedly connected to the inner side of the left and right side walls of the outer bag body, respectively. The reinforcing rib is made of elastic material and has a thickness of 0.5 mm to 1.5 mm. The reinforcing rib is used to maintain the distance between the outer bag body and the inner bag body.

9. A double-layered ostomy bag according to claim 8, characterized in that, The outer circumferential surface of the connecting ring is provided with a pointing and positioning structure, which includes a raised mark and a corresponding groove. The raised mark is located at the upper part of the connecting ring and is triangular in shape, with the vertex of the triangle pointing radially towards the connecting ring. The groove is located at the outer edge of the sealing cap, and the shape of the groove matches the raised mark. When the sealing cap and the connecting ring are correctly aligned, the raised mark is embedded in the groove. The raised mark and the groove are visually distinguished by color difference to assist the user in correctly aligning the sealing cap and the connecting ring.

10. A double-layered ostomy bag according to claim 9, characterized in that, The inner bag has a flanged structure at its opening, with a width of 8 mm to 12 mm, and the flanged structure is evenly distributed along the circumference of the opening of the inner bag. The flanged structure of the inner bag is fixedly connected to the opening of the outer bag by a heat-sealing process, so that the inner bag and the outer bag are connected to the connecting ring together. The inner side of the flanged structure of the inner bag is coated with a hydrophilic coating to enhance the comfort of the inner bag in contact with the skin. The bottom center of the inner bag has a gravity guiding structure, which is funnel-shaped and its diameter gradually decreases from top to bottom, to guide the contents to converge towards the discharge valve.

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