CN112168444A

CN112168444A - Balloon type uterine stent for preventing uterine cavity adhesion

Info

Publication number: CN112168444A
Application number: CN202011027474.7A
Authority: CN
Inventors: 王双; 孟荣华; 毕方成
Original assignee: Taipingyang Kangtai Scientific Apparatus Jinan Co ltd
Current assignee: Taipingyang Kangtai Scientific Apparatus Jinan Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-05

Abstract

The invention relates to a balloon type uterine support for preventing uterine cavity adhesion, which comprises a main bag, a bottom bag arranged at the lower part of the main bag and a catheter. A groove is formed on one side of the bottom bag facing the main bag, and the lower part of the main bag is arranged in the groove. The catheter is provided with channels which are respectively communicated with the sac cavity of the main sac, the sac cavity of the bottom sac and the uterine cavity, and the channel communicated with the uterine cavity extends out of the top end of the main sac. After the bottom bag is expanded, the wall surface of the groove can be formed into an inwards concave cambered surface. By controlling the relative swelling degree between the main bag and the bottom bag, the inner edge of the notch of the groove can be selectively pressed and jointed with the outer wall of the lower part of the main bag to form a gap. The utility model improves the drainage capacity of the liquid in the uterine cavity, so that the liquid in the uterine cavity can be discharged in time, and the healing of the wound surface of the uterine cavity is accelerated.

Description

Balloon type uterine stent for preventing uterine cavity adhesion

Technical Field

The invention relates to the field of medical instruments, in particular to a balloon type uterine stent which is arranged in a uterine cavity and can prevent adhesion of the cavity wall.

Background

The intrauterine adhesion is a pathological phenomenon due to partial or whole adhesion formed after the intrauterine membrane is damaged, such as uterine curettage after artificial abortion and drug abortion, uterine curettage after midterm induction or term delivery, non-pregnancy uterine diagnostic curettage, hysteromyoma removal, submucosal myoma removal, hysteroscopic endometriectomy and the like.

Intrauterine adhesions can often cause abnormal menstruation, such as hypomenorrhea or amenorrhea. Patients are prone to abortion, premature birth, ectopic pregnancy, fetal death and intrauterine, placental implantation, placental adhesion and even infertility.

With the increasing proportion of the current young people to do the abortion operation, the number of the patients who are infertile and infertile due to the abortion operation is increased, which is not beneficial to the national population policy and the benign and continuous development of the society, and causes heavy burden to the future old-age care, and increases the risk. Therefore, it is urgently needed to improve the treatment effect of preventing intrauterine adhesion by placing a stent into an intrauterine cavity, reduce side effects and promote quick uterine health recovery by improving the structure of the existing intrauterine stent.

The existing uterine cavity bracket derives various shapes, such as a round shape, a T shape and a uterine shape, wherein the uterine cavity bracket has more clinical use due to the fact that the outline of the uterine cavity bracket is more approximate to the shape of the uterine cavity and better effect of preventing and treating intrauterine adhesion, but has the defects of poor flow guide effect, inconvenience for discharging liquid in the uterine cavity and influence on the healing speed of a wound surface.

Disclosure of Invention

Aiming at the defects of the existing saccule support in use, the invention provides a saccule type uterine support with an anti-adhesion uterine cavity, which improves the drainage capacity of liquid in the uterine cavity on the premise of keeping a better function of preventing the adhesion of the uterine cavity, enables the liquid in the uterine cavity to be discharged in time and is beneficial to accelerating the healing of the wound surface of the uterine cavity.

The technical scheme adopted by the invention for solving the technical problems is as follows: a balloon type uterine support for preventing uterine cavity adhesion comprises a main bag, a bottom bag arranged at the lower part of the main bag and a catheter. A groove is formed in one side, facing the main bag, of the bottom bag, and the lower portion of the main bag is placed in the groove. The outer wall of the bottom sac is acted with the lower part of the uterus, and the uterine wall at the lower part of the uterus can be fully isolated.

The catheter is provided with a cavity channel which is respectively communicated with the cavity of the main bag, the cavity of the bottom bag and the uterine cavity, and is respectively used for controlling the expansion and contraction of the main bag, the expansion and contraction of the bottom bag and discharging liquid in the uterine cavity, medicine can be injected into the uterine cavity when needed, and a channel communicated with the uterine cavity extends out of the top end of the main bag.

And after the bottom bag is expanded, the wall surface of the groove can be formed into an inwards concave arc surface.

By controlling the relative swelling degree between the main bag and the bottom bag, the inner edge of the notch of the groove can be selectively pressed and jointed with the outer wall of the lower part of the main bag to form a gap.

After the bottom sac expands, acting force can be applied to the main sac, the main sac is pushed inwards, and the main sac is pressed on the inner wall body of the uterine cavity. Moreover, the main sac can move longitudinally relative to the uterine cavity by regulating and controlling the swelling degree of the bottom sac

In an initial state, the inner wall surface of the groove of the bottom bag is in contact with the outer wall surface of the lower part of the main bag.

Further, the base bag comprises an inner bag sleeve and an outer bag sleeve, and the outer bag sleeve extends upwards from the upper end of the inner bag sleeve. After the bottom bag is expanded, the groove is formed on the inner bag sleeve, the inner wall of the outer bag sleeve is formed into an inclined plane, and the minimum inner diameter of the outer bag sleeve is always larger than the inner diameter of the port of the inner bag sleeve. Preferably, after the bottom sac is inflated, an annular sac ring protruding outwards in the radial direction is formed at the upper end opening of the outer sac sleeve. Furthermore, after the bottom bag is inflated, a protrusion is formed inside the upper port of the outer bag sleeve and can be supported on the outer wall of the main bag. The direction of the bulge is along the oblique upper direction, the degree of the bulge can be controlled to regulate the magnitude of the pushing force which is exerted on the main sac by the bulge and along the oblique upper direction, and further the relative extrusion degree between the main sac and the inner wall surface of the uterine cavity is controlled.

Furthermore, the free end of the guide pipe is provided with a first branch pipe, a second branch pipe and a third branch pipe. The catheter comprises an outer tube, an intermediate tube and an inner tube which are sleeved together. One end of the inner pipe is connected with the third branch pipe, and the other end of the inner pipe extends out of the top end of the main bag and is provided with a flow guide hole in a section of pipe wall extending to the outside of the main bag. One end of a cavity formed between the inner pipe and the middle pipe is connected with the first branch pipe, the other end of the cavity extends into the main bag, and a through hole is formed in the pipe wall of the middle pipe. One end of a cavity channel formed between the outer pipe and the middle pipe is connected with the second branch pipe, and the other end of the cavity channel extends to the lower part of the bottom bag and is communicated with a bag cavity of the bottom bag.

Further, an annular channel is formed on the bottom surface of the groove.

The free end of the guide pipe is provided with a first branch pipe, a second branch pipe, a third branch pipe and a fourth branch pipe. The pipe includes outer tube, intermediate pipe and the inner tube that the suit is in the same place and be equipped with axially extended partition wall board in the lumen of inner tube and divide into left lumen and right lumen with the lumen of inner tube.

One end of the left tube cavity is connected with the first branch tube, the other end of the left tube cavity extends into the main bag, and a through hole is formed in the tube wall of the left tube cavity.

One end of the right pipe cavity is connected with the third branch pipe, and the other end of the right pipe cavity extends out of the top end of the main bag and is provided with a flow guide hole in a section of pipe wall extending to the outside of the main bag.

One end of a cavity formed between the inner pipe and the middle pipe is connected with the fourth branch pipe, and the other end of the cavity extends to the groove of the bottom bag and is communicated with an annular channel arranged on the bottom surface of the groove.

One end of a cavity channel formed between the outer pipe and the middle pipe is connected with the second branch pipe, and the other end of the cavity channel extends to the lower part of the bottom bag and is communicated with a bag cavity of the bottom bag.

Furthermore, the conduit is provided with a radially extending communicating pipe, the inner end of the communicating pipe transversely penetrates through the cavity channel formed between the outer pipe and the middle pipe and extends into the cavity channel formed between the middle pipe and the inner pipe, and the outer end of the communicating pipe extends out of the conduit and is connected with a side branch pipe.

Furthermore, a pressure gauge is arranged on the second branch pipe, the second branch pipe is connected with the pump through a connecting pipe, and the pump is electrically connected with the control device.

Further, after the bottom bag is expanded, the projection of the port of the groove and the projection of the port of the bottom bag are both elliptical.

Furthermore, after the bottom bag is expanded, a protruded bag rib is formed on the inner wall of the bottom bag, and the end surface of the bag rib can be in pressure contact with the outer wall of the expanded main bag.

The invention has the beneficial effects that: on the premise of keeping a good function of preventing intrauterine adhesion, the utility model improves the drainage capacity of liquid in the uterine cavity, so that the liquid in the uterine cavity can be discharged in time, and the healing of the wound surface of the uterine cavity is accelerated.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment of the present patent.

Fig. 2 is a schematic view of a part of the enlarged structure at I in fig. 1.

Figure 3 is a top view schematic of the lower bladder of the embodiment shown in figure 1.

Fig. 4 is a schematic structural diagram of the second embodiment of the present patent.

Fig. 5 is a schematic view of a partial cross-sectional configuration of a catheter that can be used in the embodiment shown in fig. 4.

Figure 6 is a top view schematic of the lower bladder of the embodiment shown in figure 4.

In the figure: the device comprises a main sac 1, a bottom sac 2, an inner sac sleeve 21, an outer sac sleeve 22, a protruding part 221, an inclined surface 23, a groove 24, an annular channel 25, a catheter 3, a diversion hole 30, an outer cavity channel 31, an intermediate cavity channel 32, an inner cavity channel 33, an outer ring cavity 34, an intermediate ring cavity 35, a left cavity channel 36, a right cavity channel 37, a communicating pipe 38, a first branch pipe 4, a second branch pipe 5, a pressure gauge 51, a connecting pipe 52, a pump 53, a third branch pipe 6, a fourth branch pipe 7, a guiding and controlling hose 8, a miniature instrument 81, a side branch pipe 82 and a control device 9.

Detailed Description

The structures, proportions, and dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the skilled in the art. In addition, the terms "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

As shown in fig. 1 to 6, the balloon type uterine stent for preventing uterine cavity adhesion comprises a main balloon 1, a bottom balloon 2 arranged at the lower part of the main balloon 1 and a catheter 3. A groove 24 is formed on one side of the bottom bag 2 facing the main bag 1, and the lower part of the main bag 1 is placed in the groove 24.

After the bottom bag 2 is inflated, the projection of the port of the groove 24 (in the top view) and the projection of the port of the bottom bag 2 (in the top view) are both elliptical, and the centers of the ellipses are preferably close to each other or can coincide with each other.

The catheter 3 is provided with a cavity channel which is respectively communicated with the cavity of the main bag 1, the cavity of the bottom bag 2 and the uterine cavity, and is respectively used for controlling the expansion and contraction of the main bag, the expansion and contraction of the bottom bag and discharging liquid in the uterine cavity, medicine can be injected into the uterine cavity when needed, and a channel communicated with the uterine cavity extends out of the top end of the main bag.

After the bottom bag 2 is inflated, the wall surface of the groove 24 can be formed into an inwards concave arc surface, and at the moment, the inner wall surface of the groove 24 is similar to a bowl shape. By controlling the relative swelling degree between the main bag 1 and the bottom bag 2, the inner edge of the notch of the groove 24 can be selectively pressed against the outer wall of the lower part of the main bag 1 to form a gap.

In the initial state, the inner wall surface of the groove 24 of the base bag 2 is in contact with the outer wall surface of the lower portion of the main bag 1.

Under the above-mentioned embodiment, can exert ascending thrust to the main bag that swells when the end bag is distended, the lower extreme of end bag is in the junction department of cervix uteri and palace chamber, and the upper portion of end bag extends to the bottom of palace chamber, can form reliable support to the bottom of palace chamber with the help of the outer wall of end bag, has solved current support and can not fully cover uterus lower part position, the antiseized even treatment effect's of uterus lower part problem that leads to poor, reaches the purpose of improving the prevention and cure effect that the patient of the adhesion of lower uterine segment obtained finally. And the pressing force of the main bag on the uterine cavity can be adjusted by controlling the swelling degree of the bottom bag, so that the main bag can perform self-descending and self-ascending micro-actions relative to the uterine cavity, the convection of liquid in the uterine cavity is promoted, the liquid in the uterine cavity is pressed to the top of the main bag and is discharged into the channel from the drainage hole 30 to be discharged out of the body.

As shown in fig. 1, 3, 5 to 6, the base bladder 2 includes an inner bladder sleeve 21 and an outer bladder sleeve 22, and the outer bladder sleeve 22 extends upward from an upper end of the inner bladder sleeve 21. After the bottom bag 2 is inflated, the groove 24 is formed on the inner bag sleeve 21, the inner wall of the outer bag sleeve 22 is formed into the inclined surface 23, and the minimum inner diameter of the outer bag sleeve 22 is always larger than the inner diameter of the port of the inner bag sleeve 21. Under this embodiment, the upward pushing force can be simultaneously applied to the main bladder by the inner bladder sleeve 21 and the outer bladder sleeve 22, and the acting forces are applied to different positions of the main bladder 1 in the depth direction by the inner bladder sleeve 21 and the outer bladder sleeve 22, so that the force application effect of the bottom bladder 2 on the main bladder 1 can be improved, the main bladder obviously jumps in the depth direction relative to the uterine cavity, and the liquid in the uterine cavity is better promoted to flow to the top of the main bladder.

After the bottom bag 2 is expanded, an annular bag ring which is radially outwards convex is formed at the upper port of the outer bag sleeve 22. The structure can improve the compression degree of the bottom sac on the lower uterine segment, and is favorable for smoothing the blood circulation of the uterine cavity wall.

When the bottom bag 2 is inflated, a protrusion 221 is formed inside the upper port of the outer bag cover 22, and the protrusion 221 can be supported on the outer wall of the main bag 1. The rising direction of the protrusion part 221 is along the obliquely upward direction, and the protrusion degree of the protrusion part 221 can be controlled to regulate the magnitude of the pushing force exerted by the protrusion part 221 on the main bag 1 along the obliquely upward direction, so that the relative extrusion degree between the main bag 1 and the inner wall surface of the uterine cavity is controlled. This configuration allows a gap to be formed between the inner wall of the (inflated) base sac and the outer wall of the main sac, which helps to encourage some of the fluid in the uterine cavity to flow into the groove 24 of the base sac, and which can be matched with features such as the annular channel 25, side branch 82, etc., as will be described below (see fig. 4-6), for other beneficial purposes.

As shown in fig. 1 to 3, the free end of the conduit 3 is provided with a first branch 4, a second branch 5, and a third branch 6. The catheter 3 comprises an outer tube, an intermediate tube and an inner tube which are sleeved together.

One end of the inner tube is connected with the third branch tube 6, the other end of the inner tube extends out of the top end of the main bag 1 and a section of tube wall extending to the outside of the main bag 1 is provided with a flow guide hole 30, and liquid in the uterine cavity can be discharged out of the body from the third branch tube 6 along an inner cavity channel 33 of the inner tube. If necessary, the uterine cavity may be accessed with an examination instrument or a drug may be introduced into the uterus or the uterine cavity may be cleaned by means of the lumen 33.

One end of a middle cavity 32 formed between the inner pipe and the middle pipe is connected with the first branch pipe 4, the other end of the middle cavity extends into the main bag 1, and a through hole is formed in the pipe wall of the middle pipe. The inflation of the main bladder 1 lumen can be achieved by injecting a liquid or gas into the intermediate lumen 32 from the port of the first branch tube 4.

One end of an outer cavity 31 formed between the outer tube and the middle tube is connected with the second branch tube 5, and the other end extends to the lower part of the bottom bag 2 to be communicated with the bag cavity of the bottom bag 2. The injection of liquid or gas from the port of the second branch tube 5 into the outer channel 31 can inflate the cavity of the base bladder 2.

As shown in fig. 4 to 6, an annular groove 25 is formed on the bottom surface of the groove 24.

The free end of the guide pipe 3 is provided with a first branch pipe 4, a second branch pipe 5, a third branch pipe 6 and a fourth branch pipe 7.

The catheter comprises an outer tube, a middle tube and an inner tube which are sleeved together, and a partition plate which extends axially is arranged in a tube cavity of the inner tube to divide the tube cavity of the inner tube into a left tube cavity 36 and a right tube cavity 37.

One end of the left lumen 36 is connected with the first branch tube 4, and the other end extends into the main sac 1 and is provided with a through hole on the tube wall. The injection of a liquid or gas into the left lumen 36 from the port of the first branch tube 4 can inflate the balloon cavity of the primary balloon 1.

One end of the right tube cavity 37 is connected with the third branch tube 6, and the other end extends out of the top end of the main bag 1 and is provided with a diversion hole 30 on a section of tube wall extending to the outside of the main bag 1. The liquid in the uterine cavity can be discharged from the third branch tube 6 to the outside of the body along the right lumen 37. If necessary, the right lumen 37 may be used to access an examination instrument or to deliver a medication or to clean the uterine cavity.

One end of a middle annular cavity 35 formed between the inner pipe and the middle pipe is connected with the fourth branch pipe 7, and the other end of the middle annular cavity extends to the groove 24 of the bottom bag 2 and is communicated with an annular channel 25 arranged on the bottom surface of the groove 24. Uterine fluid or cleaning fluid that has flowed into the recess 24 will flow through the annular channel 25 into the intermediate annular chamber 35 and will be discharged from the fourth branch 7 to the outside of the body. This structure helps in time discharging the liquid of palace chamber hypomere, with the effect of the interior liquid of water conservancy diversion palace chamber of above-mentioned right lumen 37 that sets up of exerting jointly, when the end bag promoted main bag to two ascending directions extrusion palace intracavity liquid in vertical, liquid can get into the discharge passage structure that closes on fast, has accelerated the discharge velocity and the thoroughness of the interior liquid of palace chamber, and has established more favorable environment for the healing of palace chamber surface of a wound. When the uterine cavity is cleaned, cleaning fluid is injected from the top end of the uterine cavity through the right lumen 37, and the cleaning fluid can flow in a single direction to enter the groove 24 after washing the uterine cavity wall and is discharged from the middle ring cavity 35.

One end of an outer ring cavity 34 formed between the outer pipe and the middle pipe is connected with the second branch pipe 5, and the other end of the outer ring cavity extends to the lower part of the bottom bag 2 and is communicated with the bag cavity of the bottom bag 2. The injection of a liquid or gas from the port of the second branch 5 into the outer annular chamber 34 can inflate the cavity of the base bladder 2.

The conduit 3 is provided with a radially extending communication pipe 38, the inner end of the communication pipe 38 transversely penetrates through the outer annular cavity 34 formed between the outer pipe and the middle pipe and extends into the middle annular cavity 35 formed between the middle pipe and the inner pipe, and the outer end of the communication pipe 38 extends to the outside of the conduit 3 and is connected with a side branch 82. The side branch 82 can place the pilot hose 8 with the micro-instrument 81 at the input end into the middle annular cavity 35, the pilot hose 8 is electrically connected with the control device 9, and the action of the end of the pilot hose can be controlled by the control device.

The end of the pilot hose can extend along the intermediate ring cavity 35 into the groove 24 and into the uterine cavity. Therefore, the inner surface of the bottom bag is preferably provided with a protrusion or a bag rib structure which is contacted with the outer wall of the main bag to support and form a channel, so that the feeding of the hose is conveniently guided and controlled. For example, after the bottom bag is inflated, a protruding bag rib is formed on the inner wall of the bottom bag, and the end face of the bag rib can be in pressure contact with the outer wall of the inflated main bag.

After the end part of the guiding hose 8 extends into the uterine cavity (the expansion degree of the main bag can be properly weakened), the guiding hose can directly act with the wall body of the uterine cavity, and operations such as examination, supplementary treatment or sampling can be carried out at fixed points.

The leading and controlling hose is internally provided with a lead wire, a data wire and a power wire which can control the action of a micro instrument carried by the end part, and the leading and controlling hose is used in many scenes in the prior art, so that the leading and controlling hose is not described again.

In order to improve the effect that the bottom bag pushes the main bag to move, a pressure gauge 51 is arranged on the second branch pipe 5, the second branch pipe 5 is connected with a pump 53 through a connecting pipe 52, and the pump 53 is electrically connected with the control device 9. The control device can control the pump to pump out and pump in circularly, and regulate and control the frequency and amplitude of the bottom bag for pushing the main bag to move, thereby realizing the optimal drainage and liquid discharge effects. In addition, the movement of the main sac is regularly controlled, the compression degree of the main sac on different positions of the uterine cavity wall can be circularly changed, and the uterine cavity wall of a certain part of the wall surface is continuously compressed excessively, so that the blood circulation of the uterine cavity wall can be facilitated, and the healing of a wound surface after operation can be accelerated. That is, in this embodiment, the control device 9 controls the pump 53 to automatically start-stop the pump at certain time intervals, and cyclically pump out and pump in at certain frequency within a certain starting operation time (the pumping-out and pumping-in amount can be set by the detector) so that the basal sac has a continuous expansion and contraction changing state, and the main sac can be made to move at certain frequency, thereby promoting the flow of the liquid in the uterine cavity, further improving the drainage effect, facilitating the discharge of the liquid in the uterine cavity, improving the blood circulation condition of the uterine cavity wall, and facilitating the healing of the wound surface.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Many modifications may be made to the present invention without departing from the spirit or scope of the general inventive concept, and it will be apparent to those skilled in the art that changes and modifications may be made to the above-described embodiments without departing from the spirit or scope of the invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A balloon type uterine stent for preventing uterine cavity adhesion comprises a main balloon and a catheter, and is characterized in that: the bottom bag is arranged at the lower part of the main bag, a groove is formed at one side of the bottom bag facing the main bag, and the lower part of the main bag is arranged in the groove;

the catheter is provided with channels which are respectively communicated with the sac cavity of the main sac, the sac cavity of the bottom sac and the uterine cavity, and the channel communicated with the uterine cavity extends out of the top end of the main sac;

after the bottom bag is expanded, the wall surface of the groove can be formed into an inwards concave arc surface;

2. The uterine cavity anti-adhesion balloon type uterine stent according to claim 1, characterized in that: the bottom bag comprises an inner bag sleeve and an outer bag sleeve, and the outer bag sleeve extends upwards from the upper end of the inner bag sleeve; after the bottom bag is expanded, the groove is formed on the inner bag sleeve, the inner wall of the outer bag sleeve is formed into an inclined plane, and the minimum inner diameter of the outer bag sleeve is always larger than the inner diameter of the port of the inner bag sleeve.

3. The uterine cavity anti-adhesion balloon type uterine stent according to claim 2, characterized in that: after the bottom bag expands, an annular bag ring which is radially and outwards convex is formed at the upper port of the outer bag sleeve.

4. The uterine cavity anti-adhesion balloon type uterine stent according to claim 2, characterized in that: after the bottom bag is expanded, a protruding part is formed on the inner side of the upper port of the outer bag sleeve and can be supported on the outer wall of the main bag.

5. The uterine cavity anti-adhesion balloon type uterine stent according to claim 1, characterized in that: the free end of the guide pipe is provided with a first branch pipe, a second branch pipe and a third branch pipe; the catheter comprises an outer tube, an intermediate tube and an inner tube which are sleeved together;

one end of the inner pipe is connected with the third branch pipe, and the other end of the inner pipe extends out of the top end of the main bag and is provided with a flow guide hole on a section of pipe wall extending to the outside of the main bag;

one end of a cavity formed between the inner pipe and the middle pipe is connected with the first branch pipe, the other end of the cavity extends into the main bag, and a through hole is formed in the pipe wall of the middle pipe;

6. The uterine cavity adhesion prevention balloon type uterine stent according to any one of claims 1 to 4, characterized in that: an annular groove is formed on the bottom surface of the groove; the free end of the guide pipe is provided with a first branch pipe, a second branch pipe, a third branch pipe and a fourth branch pipe; the catheter comprises an outer tube, a middle tube and an inner tube which are sleeved together, and a tube cavity of the inner tube is internally provided with an axially extending partition wall plate which divides the tube cavity of the inner tube into a left tube cavity and a right tube cavity;

one end of the left tube cavity is connected with the first branch tube, the other end of the left tube cavity extends into the main bag, and a through hole is formed in the tube wall of the left tube cavity;

one end of the right pipe cavity is connected with the third branch pipe, and the other end of the right pipe cavity extends out of the top end of the main bag and is provided with a flow guide hole on a section of pipe wall extending to the outside of the main bag;

one end of a cavity formed between the inner pipe and the middle pipe is connected with the fourth branch pipe, and the other end of the cavity extends to the groove of the bottom bag and is communicated with an annular channel arranged on the bottom surface of the groove;

7. The uterine cavity adhesion preventing balloon type uterine stent according to claim 6, characterized in that: the catheter is provided with a communicating pipe extending in the radial direction, the inner end of the communicating pipe transversely penetrates through a cavity channel formed between the outer pipe and the middle pipe and extends into the cavity channel formed between the middle pipe and the inner pipe, and the outer end of the communicating pipe extends out of the catheter and is connected with a side branch pipe.

8. The uterine cavity adhesion preventing balloon type uterine stent according to claim 6, characterized in that: the second branch pipe is provided with a pressure gauge and is connected with the pump through a connecting pipe, and the pump is electrically connected with the control device.

9. The uterine cavity anti-adhesion balloon type uterine stent according to claim 1, characterized in that: and after the bottom bag is expanded, the projection of the port of the groove and the projection of the port of the bottom bag are both elliptical.

10. The uterine cavity anti-adhesion balloon type uterine stent according to claim 1, characterized in that: after the bottom bag is expanded, a protruded bag rib is formed on the inner wall of the bottom bag, and the end face of the bag rib can be in pressure contact with the outer wall of the expanded main bag.