Three-layer modified ostomy bag and its application

By designing a three-layer improved ostomy bag, which employs a serrated buckle locking mechanism, an ostomy partition mechanism, and carbon sheet venting holes, the problems of ostomy bag exposure and odor emission during replacement are solved, achieving more efficient sealing and volume management, and improving the patient's user experience and caregiver convenience.

CN117959064BActive Publication Date: 2026-05-26ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2024-01-25
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing ostomy bags are prone to exposing the ostomy contents during changing, affecting the efficiency of changing and patient comfort. They also lack ventilation, leading to odor, and frequent changes increase the burden on caregivers.

Method used

The design incorporates a three-layer improved ostomy bag, featuring a serrated buckle locking mechanism, an ostomy partition mechanism, and carbon sheet ventilation holes. A volumetric scale is added to improve the ostomy bag structure, enabling sealing, ventilation, and volume observation.

Benefits of technology

It improves the sealing and ventilation of the ostomy bag, reduces odor emission, facilitates ostomy bag replacement and volume monitoring, and reduces the burden on patients and caregivers.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to a three-layer modified ostomy bag and its application. Through structural improvements, a volume scale and carbon sheet venting holes are added to the ostomy bag to address the issue of odor emission when the bag is exposed to air for extended periods. The bag's inflation and backflow prevention features allow ostomy patients and others to easily monitor the stoma's volume. The sealing mechanism is changed to a longitudinal force-based contact seal, and the locking mechanism's buckle is replaced with a serrated fastener for easy opening and closing. The absorbent material in the secondary bag effectively absorbs moisture, preventing backflow of the ostomy bag contents. The volume scale on the ostomy bag allows for assessment of the remaining stoma volume, reducing the need for stoma base plate replacements and lowering patient costs. For patients with limited mobility who find ostomy bag replacement inconvenient, or whose stomas are unsuitable for disposable ostomy bags, this bag provides a convenient alternative. The base plate and bag fit tightly without repeated checks, and the ostomy base plate and bag can be separated for multiple uses.
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Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to a three-layer modified ostomy bag and its application method. Background Technology

[0002] An ostomy bag is a medical device used to store human excrement, such as urine and feces.

[0003] Based on the design of the ostomy bag:

[0004] One-piece: Usually disposable, with a pre-cut opening, simple and easy to use, suitable for people with dexterity and the elderly;

[0005] Two-piece design: The bag and base plate can be separated, allowing for stoma care without tearing the base plate. The bag is easy to replace and protects the skin around the stoma. The base plate can be cut to fit the shape and size of the stoma. When the base plate with floating rings is placed on the stoma bag, there is no need to apply pressure to the abdomen, thus protecting the stoma.

[0006] As attached Figure 1 The ostomy bag shown was found to be ineffective in some patients due to their condition, as they were unable to excrete normally through the anus or urethra and required surgical creation of an ostomy.

[0007] When changing ostomy bags, the baseplate and the stoma of the bag need to be separated. The contents and gas discharged from the stoma are exposed and remain outside, which not only affects the efficiency of normal changes but also the mood of the person performing the change. Backflow of feces from the ostomy bag makes cleaning difficult for the patient's family. Because the skin tissue at the stoma site is relatively fragile, frequent changes of the stoma baseplate not only increase the caregiver's burden but also cause secondary damage to the stoma. Furthermore, existing ostomy bags lack ventilation structures, making them prone to inflation; if the gas is exposed, it produces an unpleasant odor.

[0008] Therefore, although existing ostomy bags can basically meet the needs of patients, there is still room for improvement in their structure and function. Summary of the Invention

[0009] To address the aforementioned issues, this application proposes a three-layer modified ostomy bag and its application method.

[0010] This application proposes a three-layer improved ostomy bag, including a three-layer ostomy bag and a matching base plate 3, with a discharge port 10 at the bottom of the ostomy bag, and also includes:

[0011] A serrated buckle locking mechanism is located between the stoma of the ostomy bag and the base plate 3, and is used to seal and fasten the stoma of the ostomy bag and the base plate 3 by means of serrated engagement.

[0012] The stoma barrier mechanism is located at the stoma and is used to block the stoma when changing the ostomy bag;

[0013] Volume ratio scale 9 is located on the outer surface of the ostomy bag and is used to observe the volume usage inside the ostomy bag.

[0014] The carbon sheet has venting holes 5, located at the top of the ostomy bag, for combing air through the carbon sheet.

[0015] As an optional embodiment of this application, the ostomy bag may optionally consist of a main bag 2 and a secondary bag 1, and be sealed at the connection port 13 of the secondary bag 1 by an ostomy bag clip.

[0016] As an optional implementation of this application, the floor area ratio scale table 9 may optionally include:

[0017] The upper scale 7 is set on the main bag 21 and is used to observe the capacity usage inside the ostomy bag where the main bag 21 is located.

[0018] The lower scale 8 is set on the auxiliary bag 1 and is used to observe the volume usage inside the ostomy bag where the auxiliary bag 1 is located.

[0019] As an optional embodiment of this application, the serrated locking mechanism may optionally be a ring structure and be consistent with the stoma.

[0020] As an optional embodiment of this application, the serrated latching locking mechanism may optionally include:

[0021] The first toothed chain 41 is mounted on the chassis 3;

[0022] A second toothed chain 43 is installed on the stoma;

[0023] The first sawtooth chain 41 and the second sawtooth chain 43 are arranged parallel to each other and with a gap between them;

[0024] When the ostomy bag is installed onto the base plate 3, the first toothed chain 41 and the second toothed chain 43 cooperate to form a toothed meshing structure, and the base plate 3 and the ostomy are sealed together by the meshing between the teeth.

[0025] As an optional embodiment of this application, the stoma septum may optionally include:

[0026] A partition plastic plate 42 is provided on the left side of the second toothed chain 43;

[0027] The left and right sides of the partition plastic plate 42 are respectively provided with an external hand contact 6 and an internal contact 12, and the chassis 3 is provided with a locking point 11, wherein:

[0028] The external hand contact 6 is used by medical staff to manually trigger the rotation of the baffle 42, rotating the internal contact 12 on the partition plastic plate 42 to the locking point 11 or unscrewing it from the locking point 11.

[0029] The internal contact 12 is used to engage with the locking point 11 to fix the partition plastic plate 42.

[0030] As an optional implementation of this application, it may also include:

[0031] Baffle 14 is used to separate the main bag 2 and the secondary bag 1;

[0032] The filter layer 16 is located inside the secondary bag 1 below the baffle 14;

[0033] The filter hole 15 is located on the baffle 14 and connects the connection port 13 of the auxiliary bag 1 and the filter layer 16. It is used to absorb the liquid that seeps out of the main bag 1 and filter it.

[0034] In another aspect, this application proposes a method for applying a three-layer modified ostomy bag, comprising the following steps:

[0035] When changing the ostomy bag:

[0036] First, touch the external hand contact 6 and move it so that the internal contact 12 on the partition plastic plate 42 rotates to the locking point 11 and makes contact with it to fix the partition plastic plate 42, and use the partition plastic plate 42 to cover the stoma.

[0037] Relative to the base plate 3, rotate the ostomy bag to disengage the first toothed chain 41 and the second toothed chain 43, and unscrew the engagement to connect the base plate 3 and the ostomy opening;

[0038] Replace the ostomy bag onto chassis 3.

[0039] Technical effects of the present invention:

[0040] This application improves the ostomy bag structure by incorporating a serrated buckle locking mechanism, an ostomy partition mechanism, and a baffle between the stoma and the base plate. A volume scale 9 and carbon sheet venting holes 5 are added to the ostomy bag to address the issue of odor emission caused by prolonged exposure to air. The bag's inflation and fluid backflow mechanisms allow patients and others to easily monitor the stoma volume. The two-piece ostomy bag's lateral force sealing is changed to longitudinal force sealing with rubber contact sealing. The locking mechanism's buckle is replaced with a serrated fastener for easy opening and closing. This reduces urine and fecal exposure, making the stoma more acceptable to patients and caregivers. For some patients experiencing bloating, excessive feces, or urine, timely gas expulsion and the use of absorbent material in the accessory bag can effectively absorb moisture and prevent backflow of the ostomy bag contents. The volume markings on the ostomy bag allow patients to determine the remaining volume of the stoma, reducing the need for stoma baseplate replacements and lowering patient costs. For patients with limited operational abilities who find ostomy bag replacement inconvenient, or whose stomas are not suitable for disposable ostomy bags, this improved ostomy bag can be used. The baseplate and bag fit tightly together, eliminating the need for repeated checks, and the stoma baseplate and ostomy bag can be separated for multiple uses, making it convenient to use.

[0041] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0042] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0043] Figure 1 The image shown is an illustration of the effect of an existing ostomy bag;

[0044] Figure 2 The diagram shown is a front view of the application structure of the present invention;

[0045] Figure 3 The diagram shows a serrated meshing connection structure between the chassis and the stoma according to the present invention.

[0046] Figure 4 The diagram shown illustrates the application principle of the serrated snap-lock mechanism of the present invention.

[0047] Figure 5 The diagram shown is a schematic diagram of the application structure of the saw attachment bag of the present invention;

[0048] Figure 6 The present invention is shown Figure 5 A magnified structural diagram of part A in the middle. Detailed Implementation

[0049] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0050] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0051] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0052] Example 1

[0053] like Figure 1 The image shown illustrates the clinical application effect of an ostomy bag. This design improves upon the existing three-layer ostomy bag, providing it with more comprehensive and effective clinical functional structures to overcome the shortcomings of current ostomy bags. It addresses issues such as odor emission from prolonged exposure to air, air inflation and fluid backflow, easier access for ostomy patients and others to monitor stoma volume, a change from lateral force sealing in a two-piece ostomy bag to longitudinal force sealing with rubber contact, and a replacement of the traditional buckle locking mechanism with a serrated fastener for easier opening and closing.

[0054] The following will be combined with the appendix Figure 2-6 The improved structure of the ostomy bag in this scheme is described.

[0055] like Figure 2 As shown, this application proposes a three-layer improved ostomy bag, including a three-layer ostomy bag and a matching base plate 3. The bottom of the ostomy bag is provided with a discharge port 10, and it also includes:

[0056] A serrated buckle locking mechanism is located between the stoma of the ostomy bag and the base plate 3, and is used to seal and fasten the stoma of the ostomy bag and the base plate 3 by means of serrated engagement.

[0057] The stoma barrier mechanism is located at the stoma and is used to block the stoma when changing the ostomy bag;

[0058] Volume ratio scale 9 is located on the outer surface of the ostomy bag and is used to observe the volume usage inside the ostomy bag.

[0059] The carbon sheet vent 5 is located at the top of the ostomy bag and is used to allow air to pass through the carbon sheet. The carbon sheet vent 5 is mainly a vent hole set at the top of the ostomy bag, with a carbon sheet inside and a cap on the outside. If the ostomy bag is found to be bloated, the cap can be unscrewed to add the carbon sheet vent 5 at the top of the ostomy bag (the carbon sheet can effectively absorb odor, and the vent 5 can prevent bloating).

[0060] like Figure 2 and 5 As shown, as an optional embodiment of this application, the ostomy bag may optionally consist of a main bag 2 and a secondary bag 1, and the secondary bag 1 is sealed at the connection port 13 by an ostomy bag clip.

[0061] This solution primarily employs a detachable ostomy bag structure. The ostomy bag consists of a main bag and a secondary bag, which are connected at the connection port 13 using ostomy bag clips, buckles, zippers, etc. This detachable bag structure facilitates timely replacement of the secondary bag, allowing the main bag to remain on the base plate 3 for extended periods. This eliminates the need for replacement every time the ostomy bag is full of feces or other waste, thus reducing the workload for both nurses and patients.

[0062] like Figure 2 As shown, as an optional embodiment of this application, the floor area ratio scale table 9 may optionally include:

[0063] The upper scale 7 is set on the main bag 21 and is used to observe the capacity usage inside the ostomy bag where the main bag 21 is located.

[0064] The lower scale 8 is set on the auxiliary bag 1 and is used to observe the volume usage inside the ostomy bag where the auxiliary bag 1 is located.

[0065] The scale on the transparent bag allows for easy monitoring of the ostomy bag's internal volume. A volume scale (9) is marked on the outer surface of the ostomy bag, facilitating timely bag changes for patients and their families.

[0066] The volumetric scale 9 is divided into upper and lower sections: upper scale 7 and lower scale 8, which are respectively located on the main and auxiliary bags to indicate the volume of feces, urine, etc., inside the bags. The scales are made of transparent material to facilitate observation of the solution levels inside the bags.

[0067] As an optional embodiment of this application, the serrated locking mechanism may optionally be a ring structure and be consistent with the stoma.

[0068] This solution mainly uses a zipper-like interlocking structure to seal and connect the ostomy opening of the ostomy bag to the base plate 3.

[0069] Therefore, the serrated snap-locking mechanism used is a ring structure, which is convenient for installation.

[0070] like Figure 3 As shown, as an optional embodiment of this application, the serrated latching locking mechanism optionally includes:

[0071] The first toothed chain 41 is mounted on the chassis 3;

[0072] A second toothed chain 43 is installed on the stoma;

[0073] The first sawtooth chain 41 and the second sawtooth chain 43 are arranged parallel to each other and with a gap between them;

[0074] When the ostomy bag is installed onto the base plate 3, the first toothed chain 41 and the second toothed chain 43 cooperate to form a toothed meshing structure, and the base plate 3 and the ostomy are sealed together by the meshing between the teeth.

[0075] Here, the base plate 3 and the stoma of the ostomy bag are connected by a ring-shaped serrated buckle locking mechanism.

[0076] The serrated buckle locking mechanism includes: a first serrated chain 41 disposed on the chassis 3, and a second serrated chain 43 disposed on the stoma. The first serrated chain 41 and the second serrated chain 43 can be sealed and engaged together through a zipper-like structure.

[0077] The ostomy bag locking mechanism has been modified. Currently, the most common locking mechanisms involve lateral force or manual pressure from the patient to ensure a tight fit. This modification utilizes a staggered serration system with longitudinal pressure. The serrations inside the ostomy bag (the second serrated chain 43 located at the stoma) and the outer surface of the stoma suction cup are both lined with soft rubber (the first serrated chain 41 on the base). After locking, the staggered serrations cause the rubber-covered portion of the ostomy bag to move inward and upward, securing it firmly to the suction cup. Therefore, this design allows for convenient replacement of the ostomy bag.

[0078] like Figure 4 As shown, as an optional embodiment of this application, the stoma septum may optionally include:

[0079] A partition plastic plate 42 is provided on the left side of the second toothed chain 43;

[0080] The left and right sides of the partition plastic plate 42 are respectively provided with an external hand contact 6 and an internal contact 12, and the chassis 3 is provided with a locking point 11, wherein:

[0081] The external hand contact 6 is used by medical staff to manually trigger the rotation of the baffle 42, rotating the internal contact 12 on the partition plastic plate 42 to the locking point 11 or unscrewing it from the locking point 11.

[0082] The internal contact 12 is used to engage with the locking point 11 to fix the partition plastic plate 42.

[0083] A movable partition plastic plate 42 is added to the ostomy bag interface 13. When the ostomy bag is replaced, the partition plate can be moved and a buckle locking mechanism is used to tightly fit the partition plastic plate 42 to the ostomy bag interface.

[0084] The locking mechanism has two hand contacts at one end: the two sides of the partition plastic plate 42 are respectively provided with an external hand contact 6 (an exposed contact for nurses to touch and operate, and rotate the ostomy bag relative to the base plate after contact) and an internal contact 12. The internal contact 12 is used to lock, and after locking, it will contact a locking point 11 at the ostomy opening of the ostomy bag. The end of the internal contact 12 will be locked into the locking point 11. Then, by twisting the ostomy bag in the opposite direction, the internal contact 12 can be disengaged from the locking point 11, and the connection between the base plate 3 and the ostomy bag can be released.

[0085] The partition plastic plate 42 can be fixed to the stoma via a ring track (an additional shaft can be added at the center). By turning the external hand contact 6, the internal partition plastic plate 42 can be rotated to block the stoma (the chassis 3 is connected to the stoma; rotating it in the forward direction opens the plastic plate, allowing feces to flow into the ostomy bag; rotating it in the reverse direction closes the stoma and prevents the ostomy bag odor from escaping).

[0086] like Figure 6 As shown, as an optional embodiment of this application, it may also include:

[0087] Baffle 14 is used to separate the main bag 2 and the secondary bag 1;

[0088] The filter layer 16 is located inside the secondary bag 1 below the baffle 14;

[0089] The filter hole 15 is located on the baffle 14 and connects the connection port 13 of the auxiliary bag 1 and the filter layer 16. It is used to absorb the liquid that seeps out of the main bag 1 and filter it.

[0090] The bottom 1 / 5 of the auxiliary bag for storing the baffle is separated by a baffle 14. The bottom auxiliary bag can store absorbent material and the ostomy bag clip can be opened for replacement. The connection port 13 at the bottom of the auxiliary bag is sealed to the main bag 2.

[0091] At the bottom 1 / 5, a baffle 14 is installed inside, with a through-hole 15 (made of filter material) for connecting to the main bag. Below the baffle 14 is a filter layer 16, which allows the absorbent material of the secondary bag to absorb water in time and prevent liquid backflow.

[0092] Therefore, when changing the ostomy bag, this improved partition plastic plate 42 can be used to reduce the exposure of urine and feces, making it easier for patients and caregivers to accept the ostomy.

[0093] For some patients who have bloating, excessive feces or urine, the modified carbon sheet with vent holes 5 can be used to expel gas in time. The absorbent material of the auxiliary bag can also be used to absorb moisture in time to prevent the contents of the ostomy bag from flowing back.

[0094] The volume markings on the ostomy bag can indicate the remaining volume of the stoma, which can reduce the need for replacement of the stoma baseplate and also reduce the patient's financial burden.

[0095] For some patients who have limited operational skills and find it inconvenient to change ostomy bags, or whose ostomy itself is not suitable for disposable ostomy bags, this improved serrated buckle locking mechanism can be used. The base plate and bag are tightly fastened, eliminating the need for repeated checks, and the ostomy base plate and ostomy bag can be separated and reused multiple times.

[0096] This solution adds a movable plastic partition 42 to the ostomy bag interface (the partition can be moved when the ostomy bag is changed, and a snap-locking mechanism is used to tightly fit the partition to the ostomy bag interface; the snap-locking mechanism is described later). 2. Carbon sheet venting holes are added to the top of the ostomy bag (the carbon sheet can effectively absorb odors, and the venting holes can prevent bloating). 3. The bottom 1 / 5 of the auxiliary bag for storing the baffle is separated from the baffle. The bottom auxiliary bag can store absorbent material and can be opened for ostomy bag replacement. A filter hole (made of filter material) is opened at the bottom of the auxiliary bag and connected to the main bag, so that the auxiliary bag can absorb water in time. 4. The ostomy bag features a volume scale marking, allowing patients and their families to easily understand the remaining space and replace the bag promptly. 5. The ostomy bag's locking mechanism has been modified. Currently, the most common locking mechanisms involve horizontal force or manual pressure from the patient to ensure a tight fit. This modification will use a serrated, offset design with longitudinal pressure. The serrations inside the ostomy bag and the outer part of the stoma suction cup are both made of soft rubber. After locking, the serrations will shift, causing the rubber-covered part of the ostomy bag to move inward and upward, securing it to the suction cup. The locking mechanism has two hand contacts at one end: an inner contact for locking and an outer contact for releasing.

[0097] Operation process:

[0098] After the patient lies down, the operator cleans and dries the area around the stoma with water, applies stoma protection products, applies leak-proof ointment, and attaches the base plate. The ostomy bag is opened, its integrity checked, the ostomy bag baffle is removed into the auxiliary bag, the ostomy bag is secured to the base plate, and the locking mechanism is used to lock the stoma device in place. Then, a sealing clip is fastened to the bottom of the ostomy bag. When the ostomy bag needs to be changed, the procedure is as follows: first, release the locking mechanism; then, move the baffle to the ostomy bag opening, fasten the locking mechanism, and turn the ostomy bag opening upwards for cleaning and reuse.

[0099] This can be understood in conjunction with existing clinical methods for changing ostomy bags.

[0100] Example 2

[0101] Based on the implementation principle of Embodiment 1, this application, in another aspect, proposes a method for applying a three-layer modified ostomy bag, comprising the following steps:

[0102] When changing the ostomy bag:

[0103] First, touch the external hand contact 6 and move it so that the internal contact 12 on the partition plastic plate 42 rotates to the locking point 11 and makes contact with it to fix the partition plastic plate 42, and use the partition plastic plate 42 to cover the stoma.

[0104] Relative to the base plate 3, rotate the ostomy bag to disengage the first toothed chain 41 and the second toothed chain 43, and unscrew the engagement to connect the base plate 3 and the ostomy opening;

[0105] Replace the ostomy bag onto chassis 3.

[0106] The specific steps of this solution can be implemented in conjunction with the description of Example 1, or by referring to existing stoma replacement methods. This example will not elaborate further.

[0107] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A three-layer improved ostomy bag, comprising a three-layer ostomy bag and a matching base plate, the ostomy bag consisting of a main bag and a secondary bag, sealed at the connection of the secondary bag by an ostomy bag clip, and a discharge port provided at the bottom of the ostomy bag, characterized in that, Also includes: The serrated buckle locking mechanism is located between the stoma of the ostomy bag and the base plate, and is used to seal and lock the stoma of the ostomy bag and the base plate by means of serrated engagement. The serrated buckle locking mechanism is a ring structure and is consistent with the stoma. The sawtooth buckle locking mechanism includes: a first sawtooth chain set on the chassis; a second sawtooth chain set on the stoma; the first sawtooth chain and the second sawtooth chain are arranged parallel to each other and have a gap; when the stoma bag is installed on the chassis, the first sawtooth chain and the second sawtooth chain cooperate to form a sawtooth meshing structure, and the chassis and the stoma are sealed together by the meshing between the sawtooths. An ostomy baffle mechanism is located at the ostomy site to block the ostomy when changing the ostomy bag. The ostomy baffle includes a baffle plastic plate, which is located on the left side of the second toothed chain. The left and right sides of the baffle plastic plate are respectively provided with an external hand contact and an internal contact. A locking point is provided on the chassis. The external hand contact is used by medical staff to manually trigger the baffle to rotate, rotating the internal contact on the baffle plastic plate to the locking point or unscrewing it from the locking point. The internal contact is used to contact and cooperate with the locking point to fix the baffle plastic plate. A volume ratio scale is placed on the outer surface of the ostomy bag to observe the volume usage inside the ostomy bag. The carbon sheet has ventilation holes located at the top of the ostomy bag to allow air to pass through.

2. The three-layer improved ostomy bag according to claim 1, characterized in that, The volume ratio scale includes: an upper scale, set on the main bag, for observing the volume usage inside the ostomy bag where the main bag is located; and a lower scale, set on the auxiliary bag, for observing the volume usage inside the ostomy bag where the auxiliary bag is located.

3. The three-layer improved ostomy bag according to claim 1, characterized in that, Also includes: Dividers are used to separate the main bag from the secondary bag; The filter layer is located in the secondary bag below the baffle; The filter holes, located on the baffle, connect the connection port of the secondary bag to the filter layer, and are used to absorb and filter the liquid that seeps out of the main bag.

4. The method of applying the three-layer modified ostomy bag according to any one of claims 1-3, characterized in that, Includes the following steps: When changing the ostomy bag: First, touch the external hand contact point and turn it so that the internal contact point on the partition plastic plate rotates to the locking point and makes contact with it to fix the partition plastic plate, and use the partition plastic plate to cover the stoma; Rotate the ostomy bag relative to the base to disengage the first and second toothed chains and unscrew the stoma from the base. Replace the ostomy bag onto the chassis.