CN215739792U

CN215739792U - Ostomy bag

Info

Publication number: CN215739792U
Application number: CN202120720624.6U
Authority: CN
Inventors: 陈虹蓉
Original assignee: Taikang Xianlin Gulou Hospital Co ltd
Current assignee: Taikang Xianlin Gulou Hospital Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2022-02-08
Anticipated expiration: 2031-04-08

Abstract

An embodiment of the present invention provides an ostomy bag, including: the ostomy bag comprises an ostomy bag body, a liquid discharge pipe, a filter screen, a feedback pipe and a catheter, wherein a liquid inlet of the ostomy bag body is communicated with a near-end intestinal canal, and one end of the catheter sequentially penetrates through a reflux port and a liquid inlet on the ostomy bag body to be communicated with a far-end intestinal canal; the filter screen sets up in the flowing back, and is located between the import and the export of flowing back pipe, the export is through the other end intercommunication of feedback pipe and catheter, the filter screen is arranged in filtering the impurity in the intraductal intestinal juice of flowing back, like this, the intraductal intestinal juice accessible inlet of near-end intestines flows in and holds the intracavity, in the import from the flowing back pipe, after the filter screen filters, again in proper order through the export of flowing back pipe, feedback pipe and catheter flow in distal end intestinal canal to maintain the balance of patient's sign. Compared with the prior art, the intestinal juice flowing out of the patient body is returned, the nutrient components of the intestinal juice are fully utilized, and the treatment cost is reduced.

Description

Ostomy bag

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an ostomy bag.

Background

At present, for enterostomy patients, a stoma bag is usually used for collecting effusion excreted from the abdominal cavity of the patient, and in the process, the patient can lose a large amount of digestive juice, which can cause water electrolyte disorder and acid-base imbalance in the body of the patient and influence the digestive function of the intestinal tract.

In the prior art, the balance of the physical signs of the patients is usually maintained by supplementing the artificially prepared nutrient solution, which not only increases the treatment cost of the patients, but also prolongs the treatment and nursing time of the patients because the artificially prepared nutrient solution is difficult to be the same as the digestive juice lost in the bodies of the patients.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an ostomy bag, which aims to solve the problems that the balance of physical signs of a patient is maintained by supplementing a nutrient solution prepared manually, and the treatment cost of the patient is increased.

In order to solve the above problem, an embodiment of the present invention discloses an ostomy bag, including: the ostomy bag comprises an ostomy bag body, a liquid discharge pipe, a filter screen, a feedback pipe and a catheter;

the ostomy bag body is provided with an accommodating cavity, the ostomy bag body is provided with a liquid inlet, a liquid outlet and a backflow port, and the liquid inlet and the liquid outlet are respectively communicated with the accommodating cavity;

the liquid inlet is communicated with a near-end intestinal canal;

one end of the catheter is sequentially penetrated through the reflux port and the liquid inlet so as to be communicated with the distal intestinal canal;

the liquid discharge pipe comprises an inlet and an outlet, the inlet is communicated with the liquid outlet, the filter screen is arranged in the liquid discharge pipe and positioned between the inlet and the outlet, the outlet is communicated with the other end of the catheter through the feedback pipe, and the filter screen is used for filtering impurities in intestinal fluid in the liquid discharge pipe;

the intestinal juice in the near-end intestinal tube can flow into the containing cavity through the liquid inlet, flows into the liquid drainage tube from the inlet, is filtered by the filter screen, and then sequentially flows into the far-end intestinal tube through the outlet, the feedback tube and the catheter.

Further, the drain pipe includes: the placing part is used for placing a filter screen;

the placing part is close to the inlet, and the cross-sectional area of the middle part of the placing part is larger than that of the end parts of the two ends in the direction from the inlet to the outlet;

the shape of the filter screen is matched with that of the annular placing groove.

Further, an annular placing groove is formed in the inner wall of the placing part along the circumferential direction;

the filter screen is embedded in the arc-shaped placing groove.

Further, the drain pipe further includes: a connecting portion;

the connecting part is positioned between the placing part and the outlet, and the cross-sectional area of the connecting part is gradually increased in the direction from the inlet to the outlet.

Further, the ostomy bag further comprises: a sealing plug;

the sealing plug is movably connected to the liquid discharge pipe, and the shape of the sealing plug is matched with that of the connecting part;

the sealing plug is inserted into the connecting part from the outlet and is in interference fit with the connecting part when the ostomy bag is not in use, and the sealing plug is separated from the connecting part when the ostomy bag is in use.

Furthermore, a plurality of annular bulges are arranged at intervals along the circumferential direction of the sealing plug;

the annular projection is configured to increase friction between an outer wall of the sealing plug and an inner wall of the connecting portion when the sealing plug is inserted into the connecting portion from the outlet.

Further, the feedback tube includes a first end and a second end;

the shape of the first end is matched with that of the connecting part, and the shape of the second end is matched with that of the other end of the catheter.

Further, the ostomy bag further comprises: a sealing cover;

the sealing cover is movably connected to the ostomy bag body;

the sealing flap covers the return opening when the ostomy bag is not in use, and the sealing flap does not cover the return opening when the ostomy bag is in use.

Further, the ostomy bag further comprises: the tweezers are used for replacing the filter screen.

Further, the ostomy bag body and the liquid discharge pipe are of an integrally formed structure;

the ostomy bag body is made of silica gel.

The ostomy bag provided by the embodiment of the utility model has the following advantages:

in an embodiment of the utility model, an ostomy bag comprises: the ostomy bag comprises an ostomy bag body, a liquid discharge pipe, a filter screen, a feedback pipe and a catheter, wherein a liquid inlet of the ostomy bag body is communicated with a near-end intestinal canal, and one end of the catheter sequentially penetrates through a reflux port and a liquid inlet on the ostomy bag body to be communicated with a far-end intestinal canal; the filter screen sets up in the flowing back, and is located between the import and the export of flowing back pipe, the export is through the other end intercommunication of feedback pipe and catheter, the filter screen is arranged in filtering the impurity in the intraductal intestinal juice of flowing back, like this, the intraductal intestinal juice accessible inlet of near-end intestines flows in and holds the intracavity, in the import from the flowing back pipe, after the filter screen filters, again in proper order through the export of flowing back pipe, feedback pipe and catheter flow in distal end intestinal canal to maintain the balance of patient's sign. Compared with the prior art, the intestinal juice flowing out of the patient body is returned, the nutrient components of the intestinal juice are fully utilized, the treatment cost is reduced, the intestinal juice is the same as the digestive juice lost from the patient body, the recovery of the patient is facilitated, and the treatment and nursing time of the patient can be shortened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art description will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a part of the structure of an ostomy bag according to an embodiment of the utility model.

100-ostomy bag, 1-ostomy bag body, 10-chassis, 11-liquid inlet, 12-liquid outlet, 13-reflux port, 2-liquid discharge pipe, 21-inlet, 22-outlet, 23-placing part, 24-connecting part, 3-filter screen, 4-feedback pipe, 5-sealing plug, 51-annular bulge and 6-tweezers.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an embodiment of the present invention, referring to fig. 1, the ostomy bag 100 may specifically include: a bag body 1, a liquid discharge pipe 2, a filter screen 3, a feedback pipe 4 and a catheter (not shown in the figure); the ostomy bag body 1 is provided with an accommodating cavity, the ostomy bag body 1 is provided with a liquid inlet 11, a liquid outlet 12 and a return port 13, and the liquid inlet 11 and the liquid outlet 12 are respectively communicated with the accommodating cavity; the liquid inlet 11 is used for being communicated with a near-end intestinal canal; one end of the catheter is sequentially penetrated through a reflux port 13 and a liquid inlet 11 to be communicated with a far-end intestinal canal; the liquid discharge pipe 2 comprises an inlet 21 and an outlet 22, the inlet 21 is communicated with the liquid outlet 12, the filter screen 3 is arranged in the liquid discharge pipe and is positioned between the inlet 21 and the outlet 22, the outlet 22 is communicated with the other end of the catheter through the feedback pipe 4, and the filter screen 3 is used for filtering impurities in intestinal fluid in the liquid discharge pipe 2; wherein, the intestinal juice in the near-end intestinal canal can flow into the containing cavity through the liquid inlet 11, and then flows into the liquid discharge pipe 2 from the inlet 21, and then flows into the far-end intestinal canal through the outlet 22, the feedback pipe 4 and the catheter in sequence after being filtered by the filter screen 3.

Specifically, as shown in fig. 1, the ostomy bag body 1 is provided with a liquid inlet port 11 on the back side (the side in contact with the skin of the patient) of the position shown in the figure. In practical application, a base plate 10 is arranged on the back surface of the ostomy bag body 1 at a position opposite to the liquid inlet 11, a connecting port is arranged on the base plate 10 at a position opposite to the liquid inlet 11, and an adhesive film is arranged on the base plate 10. Generally, the connection port (i.e. the liquid inlet 11) of the base plate 10 is opposite to the stoma of the patient, the protective film on the adhesive film is peeled off, and the adhesive surface of the adhesive film is adhered to the skin of the patient, so that the proximal intestinal canal of the patient is communicated with the liquid inlet 11, and thus the intestinal juice in the intestinal canal can flow into the accommodating cavity of the ostomy bag 100 through the liquid inlet 11.

It should be noted that the diameters of the inlet port 11 and the connecting port of the new ostomy bag 100 are generally set to be relatively small, and before the medical staff wears the ostomy bag 100, the stoma of the patient should be measured, and then the connecting port of the chassis 10 and the inlet port 11 should be cut according to the measured stoma diameter (if the stoma is not regularly round, the maximum length of the stoma may be), and leakage prevention paste should be applied around the stoma in order to prevent leakage.

Specifically, as shown in fig. 1, the liquid outlet 12 is disposed at the lower portion of the ostomy bag 100 according to the orientation shown in the figure, and the liquid outlet 12 is communicated with the accommodating cavity, so that the intestinal fluid in the accommodating cavity can flow out through the liquid outlet 12.

Specifically, as shown in fig. 1, a return port 13 is provided on the front surface (the surface opposite to the back surface) of the ostomy bag body 1, and the return port 13 is used for insertion of a catheter. In practical application, the catheter and the ostomy bag body 1 need to be connected well firstly, and the specific operation steps are as follows: one end of the catheter is sequentially penetrated through the reflux port 13, the liquid inlet 11 and the connector and inserted into a far-end intestinal canal in a patient body through a stoma.

Specifically, as shown in fig. 1, drain pipe 2 includes an inlet 21 and an outlet 22, and filter screen 3 is disposed in drain pipe 2 between inlet 21 and outlet 22. The liquid outlet 12 of the ostomy bag body 1 is communicated with the inlet 21 of the liquid discharge pipe 2, and the outlet 22 of the liquid discharge pipe 2 is communicated with the other end of the catheter through the feedback pipe 4. Like this, hold in the intracavity intestinal liquid can follow import 21 and flow into in fluid-discharge tube 2, through the filtration of filter screen 3, stay the impurity in the intestinal liquid in fluid-discharge tube 2 in filter screen 3, useful digestive juice then sees through filter screen 3 and flows out, gets into feedback pipe 4, finally reinfuses the patient once more through the catheter in to maintain the balance of patient's sign. Compared with the prior art, the intestinal juice flowing out of the patient body is returned, the nutrient components of the intestinal juice are fully utilized, the treatment cost is reduced, the intestinal juice is the same as the digestive juice lost from the patient body, the recovery of the patient is facilitated, and the treatment and nursing time of the patient can be shortened.

Specifically, in order that the impurities filtered by the filter net 3 do not flow out from the bottom of the filter net 3, the bottom of the filter net 3 is closed, and the area of each filter opening on the filter net 3 may be set according to the minimum cross-sectional area of the impurities in the actual intestinal fluid, and the area of each filter opening is smaller than the minimum cross-sectional area of the impurities. For the material of filter screen 3, this embodiment can not do the restriction to this, can select medical gauze such as nylon, cotton for use, specifically can set for according to actual demand. The number of layers of the filter screen 3 may be set to be a single layer, a double layer or a multilayer, which may not be limited in this embodiment, and the specific number of layers may be set according to actual requirements.

It should be noted that the catheter is preferably a dual-lumen balloon catheter, however, this embodiment is not limited to a specific catheter, and other catheters in the art (for example, disposable non-indwelling catheters, mushroom catheters, tip catheters, and metal catheters) may also be used, and may be specifically selected according to actual needs. The dual lumen balloon catheter is a medical device well known to those of ordinary skill in the art and the construction of this embodiment will not be described in detail.

Specifically, taking the catheter as a dual-lumen balloon catheter as an example, the ostomy bag 100 of this embodiment is connected by the following steps: 1) the double-cavity balloon catheter is well connected with the existing ostomy bag body 1 (the specific steps are described in detail above); 2) adhering the bottom disk 10 of the ostomy bag body 1 around the stoma (the specific steps are described in detail above); 3) inserting one end of the double-cavity balloon catheter with the balloon into a distal intestinal canal of a patient; 4) injecting normal saline into the air bag of the double-cavity air bag catheter from the inlet of the outer cavity tube of the double-cavity air bag catheter to flush the catheter; 5) the liquid outlet 12 of the ostomy bag body 1 is communicated with the inlet 21 of the liquid discharge pipe 2; 6) the outlet 22 of the liquid discharge pipe 2 is communicated with one end of the feedback pipe 4, and the other end of the feedback pipe 4 is communicated with the inner cavity pipe of the double-cavity balloon catheter.

In addition, the whole process of the back transfusion of the digestive juice in the embodiment is a closed process, and compared with the manual open type collection of the intestinal juice in the prior art, the embodiment can avoid the pollution of the collected digestive juice and ensure the nutrient content and cleanness of the back-transfused digestive juice so as to keep the physical sign balance of the patient.

In the present embodiment, the drain pipe 2 includes: a placing part 23, wherein the placing part 23 is used for placing the filter screen 3; the placing part 23 is close to the inlet 21, and the cross-sectional area of the middle part of the placing part 23 is larger than that of the end parts of the two ends in the direction from the inlet 21 to the outlet 22; the shape of the filter screen 3 is matched with that of the annular placing groove.

Specifically, as shown in fig. 1, the liquid discharge pipe 2 is provided with a placement portion 23, the placement portion 23 is close to the inlet 21 of the liquid discharge pipe 2, the cross-sectional area of the middle portion of the placement portion 23 is larger than the cross-sectional areas of the end portions at both ends in the direction from the inlet 21 to the outlet 22 (in the direction from the top to the bottom in the drawing), that is, the cross-sectional area of the middle region of the placement portion 23 is larger than the cross-sectional area of the end portion at one end close to the inlet 21, and the cross-sectional area of the end portion at one end far from the inlet 21, that is, the middle portion of the placement portion 23 is outwardly convex, the convex structure may be wedge-shaped or arc-shaped, and the cross-sectional shape of the entire placement portion 23 is similar to "lantern-shaped". The cross-sectional shape of the filter screen 3 is adapted to the cross-sectional shape of the placing part 23, so that the filter screen 3 can utilize the space of the placing part 23 to a greater extent to store more impurities.

Alternatively, in order to improve the aesthetic appearance of the ostomy bag 100, the cross-sectional areas of the ends of both ends of the placement portion 23 of the drainage tube 2 are equal as shown in fig. 1. With respect to the placement portion 23, the placement portion 23 may be considered as a symmetrical figure with reference to a center line in the horizontal direction (a horizontal line is drawn with reference to the center of the placement portion 23) in the direction from the inlet 21 to the outlet 22.

In the embodiment of the present invention, an annular placing groove is provided on the inner wall of the placing portion 23 in the circumferential direction; the filter screen 3 inlays and locates in the arc standing groove, like this, can ensure that filter screen 3 can not follow 2 landing of fluid-discharge tube, improves placing the steadiness of filter screen 3.

In the present embodiment, the drain pipe 2 further includes: a connecting portion 24; the connecting portion 24 is located between the placing portion 23 and the outlet 22, and the cross-sectional area of the connecting portion 24 gradually increases in a direction from the inlet 21 to the outlet 22.

Specifically, as shown in fig. 1, the connecting portion 24 of the drain pipe 2 is located between the placing portion 23 and the outlet 22, and the cross-sectional area of the connecting portion 24 gradually increases in the direction from the inlet 21 to the outlet 22, that is, the cross-sectional shape of the connecting portion 24 is similar to a "trapezoidal" shape, and this arrangement can further ensure that the filter net 3 does not slip off from the outlet 22 of the drain pipe 2.

In an embodiment of the present invention, the ostomy bag 100 further comprises: a sealing plug 5; the sealing plug 5 is movably connected to the liquid discharge pipe 2, and the shape of the sealing plug 5 is matched with that of the connecting part 24; the sealing plug 5 is inserted from the outlet 22 into the connecting portion 24 and is interference fitted with the connecting portion 24 in a situation in which the ostomy bag 100 is not in use, and the sealing plug 5 is separated from the connecting portion 24 in a situation in which the ostomy bag 100 is in use.

In particular, as shown in fig. 1, the sealing plug 5 may be connected to the drainage pipe 2 by means of a connection string, the shape of the sealing plug 5 being adapted to the shape of the connection 24, i.e. the shape of the sealing plug 5 resembles a "trapezoid". Under the condition that the ostomy bag 100 is not used, the sealing plug 5 is inserted into the connecting part 24 from the outlet 22 and is in interference fit with the connecting part 24 so as to prevent dust or bacteria from entering the ostomy bag body 1 and ensure the cleanliness of the accommodating cavity of the ostomy bag body 1; in the situation of use of the ostomy bag 100, the sealing plug 5 is detached from the connecting portion 24.

Optionally, the connecting rope can be an elastic rope or a non-elastic rope, and can be set according to actual requirements.

In the embodiment of the present invention, as shown in fig. 1, the sealing plug 5 is provided with a plurality of annular protrusions 51 at intervals in the circumferential direction; the annular projection 51 serves to increase the friction between the outer wall of the sealing plug 5 and the inner wall of the connecting portion 24 in the event that the sealing plug 5 is inserted from the outlet 22 into the connecting portion 24.

Specifically, as shown in fig. 1, the sealing plug 5 is provided with a plurality of annular protrusions 51 at intervals in the circumferential direction, and in the case where the sealing plug 5 is inserted into the connecting portion 24 from the outlet 22, the annular protrusions 51 can increase the friction between the outer wall of the sealing plug 5 and the inner wall of the connecting portion 24 to improve the connection stability of the sealing plug 5 and the connecting portion 24. Further, in order that the friction between the outer wall of the sealing plug 5 and the inner wall of the connecting portion 24 is the same everywhere, a plurality of annular protrusions 51 are uniformly arranged in the circumferential direction of the sealing plug 5.

In an embodiment of the present invention, the feedback tube 4 comprises a first end and a second end; the first end has a shape adapted to the shape of the connecting portion 24 and the second end has a shape adapted to the shape of the other end of the catheter.

Specifically, in order to tightly connect the first end of the feedback tube 4 with the connection portion 24, the shape of the first end of the feedback tube 4 is adapted to the shape of the connection portion 24, that is, the cross-sectional shape of the first end of the feedback tube 4 is also similar to a "trapezoid". In order to tightly connect the second end of the return tube 4 to the connection portion 24, the shape of the second end of the return tube 4 is adapted to the shape of the other end of the catheter.

In an embodiment of the present invention, the ostomy bag 100 further comprises: a sealing cover; the sealing cover is movably connected to the ostomy bag body 1; the sealing lid covers the return opening 13 when the ostomy bag 100 is not in use, and does not cover the return opening 13 when the ostomy bag 100 is in use.

Specifically, in the embodiment, a sealing cover is arranged at a position of the ostomy bag body 1 close to the return opening 13, and the sealing cover covers the return opening 13 under the condition that the ostomy bag 100 is not used, so that dust or bacteria are prevented from entering the ostomy bag body 1, and the cleanliness of the accommodating cavity of the ostomy bag body 1 is ensured; in the state of use of the ostomy bag 100, the sealing cap does not cover the return opening 13 so that a catheter can be passed through.

Further, the reflux opening 13 may protrude out of the ostomy bag body 1, so that a first thread (external thread or internal thread) may be provided on a circumferential side wall of the reflux opening 13, a second thread (internal thread or external thread) matched with the first thread may be provided on an inner wall of the sealing cover, and the sealing cover is in threaded connection with the reflux opening 13. The sealing cover can be made of materials such as silica gel and rubber, so that the sealing cover is tightly connected with the backflow port 13, and the sealing performance of the sealing cover is improved.

In an embodiment of the present invention, the ostomy bag 100 further comprises: tweezers 6, tweezers 6 are used for changing filter screen 3.

Specifically, a plurality of filter meshes 3 may be disposed in one ostomy bag 100, and forceps 6 may be further disposed in the ostomy bag 100 to facilitate the exchange of the filter meshes by the medical staff, so that the medical staff can exchange the filter meshes 3 through the forceps 6 when the filter meshes 3 need to be exchanged. It should be noted that, before the tweezers 6 and the filter screen 3 are used, the filter screen 3 needs to be sterilized to ensure the cleanliness of the filter screen 3, and further ensure the cleanliness and the nutrient content of the filtered digestive juice.

In the embodiment of the utility model, as shown in fig. 1, the ostomy bag body 1 and the drainage pipe 2 are of an integrated structure, so that the tightness and the stability of the connection between the ostomy bag body 1 and the drainage pipe 2 can be ensured.

Optionally, the ostomy bag body 1 can be made of silica gel, so that the connection between the sealing plug 5 and the connecting part 24 can be tighter, and the connection between the catheter and the liquid inlet 11 and the backflow port 13 is tighter, so as to prevent the liquid leakage phenomenon at the connecting part. Of course, the ostomy bag body 1 may also be made of other materials, such as plastics, and the like, which is not limited in this embodiment, and may be specifically limited according to actual requirements.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.

The technical solutions provided by the present invention are described in detail above, and the principle and the implementation manner of the present invention are described in this document by using specific examples, and the description of the above examples is only for assisting understanding of the present invention, and the content of the present description should not be construed as limiting the present invention. While various modifications of the illustrative embodiments and applications herein will be apparent to those skilled in the art, it is not desired to be exhaustive or exhaustive that all such modifications and variations are within the scope of the utility model.

Claims

1. An ostomy bag, characterized in that the ostomy bag (100) comprises: the ostomy bag comprises an ostomy bag body (1), a liquid discharge pipe (2), a filter screen (3), a feedback pipe (4) and a catheter;

the ostomy bag body (1) is provided with an accommodating cavity, a liquid inlet (11), a liquid outlet (12) and a backflow port (13) are arranged on the ostomy bag body (1), and the liquid inlet (11) and the liquid outlet (12) are respectively communicated with the accommodating cavity;

the liquid inlet (11) is used for being communicated with a near-end intestinal canal;

one end of the catheter is sequentially penetrated through the reflux port (13) and the liquid inlet (12) to be communicated with a far-end intestinal canal;

the liquid discharge pipe (2) comprises an inlet (21) and an outlet (22), the inlet (21) is communicated with the liquid outlet (12), the filter screen (3) is arranged in the liquid discharge pipe (2) and is positioned between the inlet (21) and the outlet (22), the outlet (22) is communicated with the other end of the catheter through the feedback pipe (4), and the filter screen (3) is used for filtering impurities in intestinal fluid in the liquid discharge pipe (2);

intestinal fluid in the near-end intestinal canal can flow into the accommodating cavity through the liquid inlet (11), flows into the liquid discharge pipe (2) from the inlet (21), is filtered by the filter screen (3), and then sequentially flows into the far-end intestinal canal through the outlet (22), the feedback pipe (4) and the catheter.

2. Ostomy bag according to claim 1, characterised in that the drainage tube (2) comprises: a placing part (23), wherein the placing part (23) is used for placing the filter screen (3);

the placing part (23) is close to the inlet (21), and the cross-sectional area of the middle part of the placing part (23) is larger than that of the end parts of the two ends in the direction from the inlet (21) to the outlet (22);

the cross section shape of the filter screen (3) is matched with that of the placing part (23).

3. An ostomy bag according to claim 2, characterised in that the inner wall of the placing part (23) is provided with an annular placing groove in the circumferential direction;

the filter screen (3) is embedded in the arc-shaped placing groove.

4. An ostomy bag according to claim 2, characterised in that the drainage tube (2) further comprises: a connecting portion (24);

the connecting part (24) is positioned between the placing part (23) and the outlet (22), and the cross-sectional area of the connecting part (24) is gradually increased in the direction from the inlet (21) to the outlet (22).

5. An ostomy bag according to claim 4, characterised in that the ostomy bag (100) further comprises: a sealing plug (5);

the sealing plug (5) is movably connected to the liquid discharge pipe (2), and the shape of the sealing plug (5) is matched with that of the connecting part (24);

the sealing plug (5) is inserted from the outlet (22) into the connecting part (24) and is in interference fit with the connecting part (24) when the ostomy bag (100) is not in use, and the sealing plug (5) is separated from the connecting part (24) when the ostomy bag (100) is in use.

6. Ostomy bag according to claim 5, characterised in that the sealing plug (4) is provided with a plurality of annular protrusions (51) at intervals in the circumferential direction;

the annular projection (51) is used to increase the friction between the outer wall of the sealing plug (5) and the inner wall of the connecting part (24) in the event of insertion of the sealing plug (5) from the outlet (22) into the connecting part (24).

7. An ostomy bag according to claim 4, characterised in that the feedback tube (4) comprises a first end and a second end;

the first end is shaped to fit the shape of the connecting portion (24) and the second end is shaped to fit the shape of the other end of the catheter.

8. The ostomy bag according to claim 1, wherein the ostomy bag (100) further comprises: a sealing cover;

the sealing cover is movably connected to the ostomy bag body (1);

the sealing flap covers the return opening (13) when the ostomy bag (100) is not in use, and the sealing flap does not cover the return opening (13) when the ostomy bag (100) is in use.

9. The ostomy bag according to claim 1, wherein the ostomy bag (100) further comprises: the tweezers (6), the tweezers (6) are used for replacing the filter screen (3).

10. An ostomy bag according to claim 1, characterised in that the ostomy bag body (1) is of an integrally formed structure with the drainage tube (2);

the ostomy bag body (1) is made of silica gel.