Uterine cavity perfusion catheter

Abstract

The utility model discloses a uterine cavity perfusion catheter, relates to the technical field of catheters, and aims to solve the technical problem that medicines in a medicine injection channel cannot be utilized in uterine cavity perfusion in the prior art, so that the medicines are wasted. Wherein one side of the double-cavity catheter body is located in the uterine cavity, the other side of the double-cavity catheter body is located outside, the double-cavity catheter body is divided into a drainage pipeline and a medicine injection pipeline, the medicine injection pipeline is slidably connected with a scraping plate through an elastic piece in the side, located in the uterine cavity, of the medicine injection pipeline, and a medicine injection channel with an outlet is formed in the side wall of the medicine injection pipeline, and the distance between the medicine injection channel and the end of the medicine injection pipeline is smaller than the distance between the scraping plate and the medicine injection channel. The outlet is formed in the inner side wall of the medicine injection pipeline, and a protection device is arranged at the end, communicated with the uterine cavity, of the medicine injection pipeline. Through the scraping plate, the protection device, the medicine injection channel, the outlet and the like, medicine adsorbed on the inner wall of the medicine injection pipeline can be scraped and then is matched with the protection device, and the medicine is conveyed to a uterine cavity. The medicine consumption is reduced, and the treatment effect and the treatment efficiency of uterine cavity perfusion of a patient are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of catheters, and particularly relates to an intrauterine perfusion catheter. Background Art

[0002] Intrauterine perfusion refers to injecting a certain drug into the uterine cavity through the vagina with the help of an artificial insemination tube under aseptic conditions for treatment. Through intrauterine perfusion, the ability of endometrial differentiation and proliferation can be enhanced, inflammatory reactions can be treated, and the receptivity of the endometrium can be improved, thereby increasing the embryo implantation rate.

[0003] When performing intrauterine perfusion, it is necessary to first use a catheter to drain the fluid in the uterine cavity. Intrauterine fluid, also known as uterine fluid, refers to an unequal amount of fluid existing in the uterine cavity, which can be manifested as blood accumulation, pus accumulation, or water accumulation. Intrauterine fluid will prevent embryo implantation and make it difficult for patients to conceive. Therefore, when performing intrauterine perfusion, it is necessary to drain the fluid in the uterine cavity to the outside, and then insert a new catheter to inject the medicinal liquid into the uterus through the new catheter, and the uterine inner wall absorbs the medicinal liquid, thereby improving the receptivity of the endometrium, etc.

[0004] Currently, two catheters are used to separately drain the fluid and perfuse the medicinal liquid, which requires inserting into the patient's uterus twice. Therefore, it is inconvenient to use and prolongs the working time. The existing retainable uterine cavity irrigation, injection, and drainage tube with the patent number CN116726290A includes a double-layered filling body, a rigid stylet, and a binding band. The double-layered tubular body is provided with an injection channel and a peripheral drainage channel, and a central injection port and a peripheral drainage port are respectively provided at the top of the tubular body. At the tail end of the tubular body, there are an end joint of the injection channel and an end interface of the peripheral drainage channel. This device can provide convenience for patients who need to perform uterine cavity irrigation, injection, and drainage, especially for patients who need to perform frequent operations in a short period of time.

[0005] However, during the process of injecting and irrigating the medicine, the medicine is likely to adhere to the inner wall of the chamber of the injection channel, especially for gel-type medicinal liquids. This part of the medicinal liquid cannot come into contact with the uterine inner wall, resulting in waste of the medicine. At the same time, the contact area between the central injection port of this device and the uterine inner wall is limited, mainly relying on the fluidity of the medicine to contact the uterine inner wall, and the medicine penetration is slow, prolonging the treatment time of the patient and thus reducing the comfort of the patient. Content of the Utility Model

[0006] The utility model discloses an intrauterine perfusion catheter, aiming to solve the technical problem of waste of medicine caused by the inability to utilize the medicine in the injection channel during intrauterine perfusion in the above-mentioned existing technology.

[0007] To solve the above-mentioned existing technical problems, the technical scheme adopted by the utility model is as follows:

[0008] An intrauterine perfusion catheter includes a double-lumen catheter body with one side that can be placed in the uterine cavity and the other side that can be placed outside. The double-lumen catheter body is divided into a drainage channel and a drug injection channel. A scraper is slidably connected inside the drug injection channel on the side placed in the uterine cavity. The scraper is connected to the drug injection channel through an elastic member. A drug injection channel is also provided inside the side wall of the drug injection channel. The drug injection channel has an outlet, and the outlet is provided on the inner side wall of the drug injection channel. The distance between the outlet and the end of the drug injection channel placed in the uterine cavity is less than the distance between the scraper and the end of the drug injection channel placed in the uterine cavity. The drug injection channel is connected to a drug injection interface, and the end of the drug injection channel placed in the uterine cavity is provided with a protection device that can communicate with the uterine cavity.

[0009] After adopting this technical solution, the fluid in the patient's uterus can be drained to the outside through the drainage channel. When it is necessary to perform drug perfusion on the patient's uterus, drug injection can be carried out through the drug injection channel. The drainage of the uterine cavity and the perfusion of the drug are carried out through two non-communicating channels respectively. The processes of drainage and drug injection can be completed separately during one entry into the uterine cavity, reducing the workload of medical staff. At the same time, it avoids multiple insertions of the catheter into the patient's uterine cavity, which can improve the patient's sense of use. Drugs such as gel drugs enter the drug injection channel in the double-lumen catheter body through the drug injection interface, then pass through the outlet of the drug injection channel and finally enter the drug injection channel, and cooperate with the scraper in the drug injection channel to squeeze the scraper, causing the scraper to move away from the uterine cavity in the drug injection channel. Then, it cooperates with the protection device. When the amount of drug in the distance between the protection device and the scraper reaches a certain dose, the scraper moves towards the uterine cavity under the elastic force of the elastic member to scrape the drug adhered to the inner wall of this part of the drug delivery channel. The scraped drug and the drug originally in the distance between the protection device and the scraper simultaneously squeeze the protection device to open the channel on the protection device. The drug is output through the protection device and contacts the inner wall of the uterus. The inner diameter of the drug injection channel is smaller than the inner diameter of the drug injection channel. Injecting drugs through the drug injection channel compared to injecting drugs through the drug injection channel, because the diameter of the drug injection channel is smaller, less drug adheres to its inner side wall. Thus, in cooperation with the scraper, more drugs can contact the inner wall of the uterine cavity, thereby reducing drug waste and improving the treatment effect on the patient.

[0010] Among them, a first groove with a sealing device is provided inside the side wall of the drug injection channel. The first groove is connected to an elastic member, and the elastic member is connected to the scraper. The sealing device is two sealing strips that are hermetically connected to each other.

[0011] After adopting this technical solution, the sealing strips that are hermetically connected to each other can form a sealing structure for sealing the first groove, preventing the drug from seeping into the first groove and thus wasting the drug. When the scraper bears the extrusion pressure of the drug, the scraper can drive the elastic member to elongate in the first groove, and the drug continues to be output to further extrude the scraper and make the pressure borne by the elastic member reach the elastic limit. At this time, the elastic member contracts in the first groove, and then drives the scraper that is hermetically and slidably connected to the drug injection pipe to scrape the drug on the inner wall of the drug injection pipe, and under the extrusion action of the protective device and the elastic force of the elastic member between the drugs, the drug is transported into the uterine cavity to contact the inner wall of the uterus, improving the treatment efficiency and effect of uterine cavity perfusion for patients.

[0012] Wherein, the elastic member is a telescopic spring, one end of the telescopic spring is connected to one side of the first groove, and the other end is connected to the scraper through a connecting plate. The connecting plate is placed in the first groove, and at least two end faces of the connecting plate are in contact with the first groove, and the remaining one end face extends out between the two sealing strips after being in contact with the sealing strip and is connected to the scraper.

[0013] After adopting this technical solution, the telescopic movement of the telescopic spring can drive the change of the position of the connecting plate, thereby driving the change of the position of the scraper connected to the connecting plate, scraping the drug adhered to the inner wall of the drug injection pipe, and cooperating this part of the drug with the protective device to reduce drug loss and increase the treatment effect of uterine cavity perfusion for patients.

[0014] Wherein, the protective device includes a second groove provided on one side of the double-cavity catheter body. The second groove is provided at one end of the drug injection pipe placed in the uterine cavity. The second groove is an annular groove, and an elastic airbag is hermetically connected to the second groove. A plurality of through holes are provided on the elastic airbag, and a protective opening film is provided in each through hole.

[0015] After adopting this technical solution, the drug scraped by the scraper cooperates with the drug originally in the distance between the elastic airbag and the scraper to squeeze the elastic airbag. The elastic airbag is deformed under pressure, causing the through holes and the protective opening film on the elastic airbag to deform, thereby opening the channel on the protective opening film, and the drug enters the uterine cavity through this channel to contact the inner wall of the uterus, accelerating the drug absorption rate of the inner wall of the uterus and improving the treatment rate of uterine cavity perfusion for patients.

[0016] Wherein, the elastic airbag is connected with an air delivery channel. The air delivery channel is arranged in the side wall of the double-cavity catheter body. One side of the double-cavity catheter body placed outside is connected with an air delivery pipe. One end of the air delivery pipe is communicated with the air delivery channel, and the other end is connected with an air delivery interface. The air delivery interface is detachably connected with an air delivery device.

[0017] After adopting this technical solution, the gas transmission channel is arranged so that gas can enter the gas transmission pipeline through the gas transmission interface and finally enter the elastic airbag. When the scraper reaches the extrusion limit, that is, when it moves to the bottom of the first groove, the elastic airbag is inflated, so that the shape of the elastic airbag matches the shape of the uterine cavity. During the process of the gradual increase of the elastic airbag, the through hole and the protective opening film are directly deformed. In this process, the drug starts to flow out of the elastic airbag from the channel formed by the protective opening film and contacts the inner wall of the uterus. As the elastic airbag gradually increases and fits with the inner wall of the uterus, the drug gradually flows out of the channel formed by the protective opening film and adheres to the surface of the elastic airbag, and then contacts the inner wall of the uterus; or the drug that has already contacted the inner wall of the uterus can increase the pressure on the binding surface between the inner wall of the uterus and the drug under the extrusion of the elastic airbag, thereby improving the absorption effect and rate of the drug by the inner wall of the uterus.

[0018] Wherein, both the medicine injection channel and the outlet are inclined.

[0019] After adopting this technical solution, when the scraper scrapes the medicine on the inner wall of the medicine injection pipeline, the medicine will not return to the medicine injection interface through the medicine injection channel, ensuring the maximum usage amount of the medicine, thereby increasing the contact amount between the medicine and the inner wall of the uterus, and thus improving the treatment effect of intrauterine perfusion.

[0020] Wherein, a scale is arranged on the outer side wall of the double-lumen catheter body.

[0021] After adopting this technical solution, the accurate position of the double-lumen catheter body in the uterine cavity of the patient can be determined through the scale, which is convenient for subsequent drainage and medicine injection operations.

[0022] Wherein, a drainage port is arranged on one side of the drainage pipeline in the uterine cavity, and a drainage interface is arranged on the side outside the body.

[0023] After adopting this technical solution, the accumulated fluid in the uterine cavity can enter the drainage pipeline through the drainage port and is finally discharged from the uterine cavity of the patient through the drainage interface, improving the drainage effect of the accumulated fluid, and thus improving the treatment effect of subsequent medicine injection.

[0024] To sum up, due to adopting the above technical solution, the beneficial effects of the present utility model are:

[0025] (1) By using a scraper, a protective device, a medicine injection channel, an outlet, an elastic member, etc. that are slidably connected to the medicine injection pipeline, the medicine adsorbed on the inner wall of the medicine injection pipeline can be scraped, and the protective device and the elastic member cooperate to transport the medicine to the uterine cavity. The consumption of the medicine is reduced, thereby increasing the treatment effect and efficiency of intrauterine perfusion for patients.

[0026] (2) By using the cooperation of an elastic airbag with a gas delivery pipeline, through holes, a protective opening film, etc., during the process of the elastic airbag deforming and fitting with the uterine inner wall, it can increase the contact area and pressure between the drug and the uterine inner wall, enhance the absorption effect and rate of the drug by the uterine inner wall, and improve the treatment effect of uterine cavity perfusion for patients.

[0027] (3) By using a catheter body with a double-chamber structure, the drainage of the uterine cavity and the perfusion of the drug are respectively carried out through two non-connecting pipelines. The processes of drainage and drug injection can be respectively completed during one entry into the uterine cavity, reducing the workload of medical staff. At the same time, it avoids multiple insertions of the catheter into the patient's uterine cavity, and can improve the patient's sense of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present utility model will be described by way of examples with reference to the accompanying drawings, where:

[0029] Figure 1 is a schematic structural diagram of the present utility model;

[0030] Figure 2 is a partial sectional structural diagram of the present utility model placed in the uterine cavity;

[0031] Figure 3 is a schematic diagram of the positional relationship between the drug injection channel and the outlet.

[0032] REFERENCE NUMERALS

[0033] 1 - Drainage interface, 2 - Drug injection interface, 3 - Gas delivery pipe, 4 - Double-chamber catheter body, 401 - Scale, 402 - Drainage pipe, 403 - Second groove, 404 - First groove, 405 - Telescopic spring, 406 - Connecting plate, 407 - Scraper, 408 - Drug injection channel, 409 - Outlet, 410 - Drug injection pipe, 5 - Protective device, 501 - Elastic airbag, 502 - Through hole, 503 - Gas delivery channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and marked in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0035] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0036] The following will Figures 1-3 describe the present utility model in detail.

[0037] An intrauterine perfusion catheter, as Figures 1-3 shown, includes a double - lumen catheter body 4 with one side that can be placed in the uterine cavity and the other side that can be placed outside. The double - lumen catheter body 4 is divided into a drainage pipeline 402 and a drug - injection pipeline 410. A scraper 407 is slidably connected inside one side of the drug - injection pipeline 410 placed in the uterine cavity. The scraper 407 is connected to the drug - injection pipeline 410 through an elastic member. A drug - injection channel 408 is also provided inside the side wall of the drug - injection pipeline 410. The drug - injection channel 408 is provided with an outlet 409. The outlet 409 is arranged on the inner side wall of the drug - injection pipeline 410, and the distance between the outlet 409 and the end of the drug - injection pipeline 410 placed in the uterine cavity is less than the distance between the scraper 407 and the end of the drug - injection pipeline 410 placed in the uterine cavity. The drug - injection channel 408 is connected to a drug - injection interface 2, and a protective device 5 that can communicate with the uterine cavity is arranged at the end of the drug - injection pipeline 410 placed in the uterine cavity.

[0038] In this embodiment, the double - lumen catheter body 4 is made of flexible silicone material. The flexible silicone material is skin - friendly and easy to obtain, which can save costs. The drainage pipeline 402 and the drug - injection pipeline 410 are separated from the catheter by a partition, and the partition is integrally formed with the double - lumen catheter body 4.

[0039] In this embodiment, the drug - injection channel 408 is integrally formed with the double - lumen catheter body 4. A tubular through - groove is formed on the side wall of the double - lumen catheter body 4, and the tubular through - groove forms the drug - injection channel 408.

[0040] In this embodiment, the outlet 409 is arranged at 0.5 cm below the end of the drug - injection pipeline 410 placed in the uterine cavity.

[0041] In this embodiment, the drug - injection interface 2 is a one - way interface that only allows the liquid medicine to enter.

[0042] In this embodiment, the drug injection interface 2 is integrally formed with the drug injection pipeline 410 on the double-lumen catheter body 4 and is hermetically connected to the drug injection channel 408. A drug injection tube is provided on the drug injection interface 2, and the drug injection tube is hermetically adhered to the drug injection pipeline 410.

[0043] The fluid in the patient's uterus can be drained to the outside through the drainage pipeline 402. When drug irrigation treatment is needed for the patient's uterus, drug injection can be carried out through the drug injection pipeline 410. The drainage of the uterine cavity and the perfusion of drugs are carried out through two non-connecting pipelines respectively. The processes of drainage and drug injection can be completed respectively during one entry into the uterine cavity, reducing the workload of medical staff. At the same time, it avoids multiple insertions of the catheter into the patient's uterine cavity and can improve the patient's sense of use.

[0044] Drugs such as gel drugs enter the drug injection channel 408 in the double-lumen catheter body 4 through the drug injection interface 2, then pass through the outlet 409 through the drug injection channel 408 and finally enter the drug injection pipeline 410, and cooperate with the scraper 407 in the drug injection pipeline 410 to squeeze the scraper 407, so that the scraper 407 moves in the drug injection pipeline 410 in a direction away from the uterine cavity, and then cooperates with the protection device 5. When the amount of drug in the distance between the protection device 5 and the scraper 407 reaches a certain dose, the scraper 407 moves in a direction close to the uterine cavity under the elastic force of the elastic connection, scraping the drug adhered to the inner wall of this part of the drug delivery pipeline. The scraped drug and the drug originally in the distance between the protection device 5 and the scraper 407 simultaneously squeeze the protection device 5, opening the channel on the protection device 5, and the drug is output through the protection device 5 and contacts the inner wall of the uterus. The inner diameter of the drug injection channel 408 is smaller than the inner diameter of the drug injection pipeline 410. Compared with drug injection through the drug injection pipeline 410, because the diameter of the drug injection channel 408 is smaller, less drug adheres to its inner side wall. Cooperating with the scraper 407 can make more drugs contact the inner wall of the uterine cavity, thereby reducing drug waste and improving the treatment effect on patients.

[0045] In this embodiment, a first groove 404 with a sealing device is provided inside the side wall of the drug injection pipeline 410. The first groove 404 is connected with an elastic member, and the elastic member is connected with the scraper 407. The sealing device is two sealing strips that are hermetically connected to each other.

[0046] In this embodiment, the sealing strip is adhered to the side wall of the first groove 404, and the arc length of the first groove 404 is one-eighth of the circumference of the drug injection pipeline 410, and the height of the first groove 404 is 7 cm.

[0047] The sealing strips that are hermetically connected to each other can form a sealing structure for sealing the first groove 404 to prevent drugs from infiltrating into the first groove 404 and thus wasting drugs.

[0048] When the scraper 407 bears the extrusion pressure of the drug, the scraper 407 can drive the elastic member to elongate in the first groove 404. The drug continues to be output and further squeezes the scraper 407, causing the pressure borne by the elastic member to reach the elastic limit. At this time, the elastic member contracts in the first groove 404, thereby driving the scraper 407 that is hermetically and slidably connected to the drug injection pipe 410 to scrape the drug on the inner wall of the drug injection pipe 410. Under the extrusion action of the drug between the drugs and the elastic force of the elastic member, the drug is transported into the uterine cavity to contact the inner wall of the uterus, improving the treatment efficiency and effect of uterine cavity perfusion for patients.

[0049] In this embodiment, the elastic member is a telescopic spring 405. One end of the telescopic spring 405 is connected to one side of the first groove 404, and the other end is connected to the scraper 407 through a connecting plate 406. The connecting plate 406 is placed in the first groove 404, and at least two end faces of the connecting plate 406 are in contact with the first groove 404, and the remaining one end face extends out from between the two sealing strips after contacting the sealing strip and is connected to the scraper 407.

[0050] In this embodiment, as Figure 2 shown, one end of the telescopic spring 405 is fixedly adhered to the top of the first groove 404, and the other end is fixedly adhered to the connecting plate 406.

[0051] In this embodiment, three end faces of the connecting plate 406 are in contact with the side wall of the first groove 404, and the remaining one end face extends out from a small gap between the two sealing strips after contacting the sealing strip and is connected to the scraper 407.

[0052] In this embodiment, the thickness of the connecting plate 406 is 1 mm, and the size of the connecting plate 406 and the scraper 407 at the connection of the sealing strip is an area with a height of 1 mm and a width of 0.5 mm.

[0053] The telescopic movement of the telescopic spring 405 can drive the change of the position of the connecting plate 406, thereby driving the change of the position of the scraper 407 connected to the connecting plate 406, scraping the drug adhered to the inner wall of the drug injection pipe 410, and cooperating with the protection device 5 for this part of the drug, reducing drug loss, and increasing the treatment effect of uterine cavity perfusion for patients.

[0054] In this embodiment, the protection device 5 includes a second groove 403 provided on one side of the double - lumen catheter body 4. The second groove 403 is provided at one end of the drug injection pipe 410 on the side placed in the uterine cavity. The second groove 403 is an annular groove, and an elastic airbag 501 is hermetically connected to the second groove 403. A plurality of through - holes 502 are provided on the elastic airbag 501, and a protective opening film is provided in each of the through - holes 502.

[0055] In this embodiment, the depth of the second groove 403 is 1 mm.

[0056] In this embodiment, as Figure 2 shown, the second groove 403 is located at the top of the first groove 404.

[0057] In this embodiment, the elastic airbag 501 is a spherical airbag. One side of the elastic airbag 501 is hermetically adhered to the second groove 403, and the part adhered to the second groove 403 is aligned and attached to the medicine injection pipeline 410. The remaining part of the spherical airbag is placed in the second groove 403.

[0058] In this embodiment, the protective opening film is a cross film, that is, a film with a cross intersection and a through hole provided at the intersection center. The protective cross film is made of silica gel and has a certain elasticity. It can keep the cross structure in its shape when the elastic airbag 501 is not deformed. When the elastic airbag 501 is deformed, it will deform with the degree of deformation of the elastic airbag 501.

[0059] In this embodiment, the cross film is adhered to the through hole 502. The cross film is in a closed state under a relatively small pressure. When the through hole 502 is deformed or under extrusion pressure, the cross film deforms accordingly, and then the channel at the center of the cross film is opened under the action of the extrusion pressure of the liquid medicine.

[0060] The medicine scraped by the scraper 407 cooperates with the medicine originally in the distance between the elastic airbag 501 and the scraper 407 to squeeze the elastic airbag 501. The elastic airbag 501 is compressed and deformed, causing the through hole 502 and the protective opening film on the elastic airbag 501 to deform, thereby opening the channel on the protective opening film. The medicine is output from this channel and contacts the uterine inner wall, accelerating the absorption rate of the medicine by the uterine inner wall and improving the treatment rate of the uterine cavity perfusion of the patient.

[0061] In this embodiment, both the medicine injection channel 408 and the outlet 409 are inclined.

[0062] In this embodiment, the outlet 409 and the medicine injection channel 408 are inclined from the side close to the medicine injection pipeline 410 placed in the uterine cavity to the side away from the uterine cavity.

[0063] When the scraper 407 scrapes the medicine on the inner wall of the medicine injection pipeline 410, the medicine will not return to the medicine injection interface 2 through the medicine injection channel 408, ensuring the maximum usage amount of the medicine, thereby increasing the contact amount between the medicine and the uterine inner wall, and thus improving the treatment effect of the uterine cavity perfusion.

[0064] In this embodiment, a scale 401 is provided on the outer side wall of the double - lumen catheter body 4.

[0065] In this embodiment, the scale 401 is printed with ink on the outer wall of the double-lumen catheter body 4.

[0066] The scale 401 can determine the accurate position of the double-lumen catheter body 4 in the uterine cavity of the patient, facilitating subsequent drainage and drug injection operations.

[0067] In this embodiment, the drainage pipe 402 is provided with a drainage port on one side in the uterine cavity and a drainage interface 1 on the side outside the body.

[0068] The fluid accumulation inside the uterine cavity can enter the drainage pipe 402 through the drainage port and finally be discharged from the patient's uterine cavity via the drainage interface 1, improving the drainage effect of the fluid accumulation, and thus improving the effect of subsequent drug injection treatment.

[0069] The specific usage method of the present utility model is as follows:

[0070] Refer to Figures 1-3 , when using this device, first insert the double-lumen catheter body 4 into the uterine cavity along the patient's vagina, and determine the position of the double-lumen catheter body 4 in the uterine cavity according to the scale 401 on the double-lumen catheter body 4. Then open the drainage interface 1 on the drainage pipe 402, and let the fluid accumulation in the uterine cavity be discharged to the outside through the drainage pipe 402 under the action of the negative pressure in the uterine cavity and the two-way action of the drainage pipe 402 until the drainage interface 1 no longer flows out the fluid accumulation, and then close the drainage interface 1.

[0071] Then open the drug injection interface 2, connect the syringe to the drug injection interface 2, and inject drugs into the drug injection interface 2. The drug solution is pushed by the syringe along the drug injection channel 408 to the outlet 409, and gradually enters the drug injection pipe 410 along the inner wall of the drug injection pipe 410. During this process, the cavity between the elastic airbag 501 and the scraper 407 is gradually filled, generating an extrusion force on the scraper 407. When the scraper 407 bears the extrusion force of the drug, the scraper 407 can drive the telescopic spring 405 to extend in the first groove 404. The drug continues to be output, further squeezing the scraper 407 and making the pressure borne by the telescopic spring 405 reach the elastic limit. At this time, the telescopic spring 405 contracts in the first groove 404, thereby driving the scraper 407 that is hermetically and slidably connected to the drug injection pipe 410 to scrape the drug on the inner wall of the drug injection pipe 410, and under the extrusion action of the drug between the drugs, the drug is transported to the uterine cavity to contact the uterine inner wall, improving the treatment efficiency and effect of perfusion of the patient's uterine cavity.

[0072] Until all the drugs injected into the cavity between the elastic airbag 501 and the scraper 407 and the drugs scraped by the scraper 407 enter the uterine cavity under the action of elasticity through the through hole 502. When all the required drugs enter the drug injection pipe 410, after the uterine inner wall of the patient absorbs the drug solution regarding the drug injection pipe 410, then withdraw the double-lumen catheter body 4 from the patient's body.

[0073] Example 2

[0074] This example is basically the same as Example 1, except that: in this example, the elastic airbag 501 is connected with an air delivery channel 503, the air delivery channel 503 is arranged in the side wall of the double-lumen catheter body 4, one side of the double-lumen catheter body 4 placed outside is connected with an air delivery tube 3, one end of the air delivery tube 3 is communicated with the air delivery channel 503, the other end is connected with an air delivery interface, and the air delivery interface is detachably connected with an air delivery device.

[0075] In this example, the air delivery channel 503 and the double-lumen catheter body 4 are integrally formed.

[0076] In this example, the air delivery device is a manual inflation device or an electric inflation device, and medical staff can select the inflation device according to their own use.

[0077] In this example, the air delivery tube 3 and the air delivery channel 503 are hermetically adhered, and the air delivery interface and the air delivery tube 3 are hermetically adhered.

[0078] The arrangement of the air delivery channel 503 enables gas to enter the air delivery tube 3 through the air delivery interface and finally enter the elastic airbag 501. When the scraper 407 reaches the extrusion limit, that is, when it moves to the bottom of the first groove 404, the elastic airbag 501 is inflated, so that the shape of the elastic airbag 501 matches the shape of the uterine cavity. During the process of the gradual increase of the elastic airbag 501, the through hole 502 and the protective opening film are directly deformed. In this process, the drug starts to be output from the channel formed by the protective opening film and contacts the uterine inner wall when the elastic airbag 501 contacts the uterine inner wall. As the elastic airbag 501 gradually increases and fits with the uterine inner wall, the drug gradually flows out of the channel formed by the protective opening film and adheres to the surface of the elastic airbag 501, and then contacts the uterine inner wall; or the drug that has already contacted the uterine inner wall can increase the pressure on the binding surface between the uterine inner wall and the drug under the extrusion of the elastic airbag 501, thereby improving the absorption effect and rate of the uterine inner wall on the drug.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intrauterine perfusion catheter, characterized in that: It includes a double - lumen catheter body (4) with one side that can be placed in the uterine cavity and the other side that can be placed outside. The double - lumen catheter body (4) is divided into a drainage duct (402) and a drug - injection duct (410). A scraper (407) is slidably connected inside one side of the drug - injection duct (410) placed in the uterine cavity. The scraper (407) is connected to the drug - injection duct (410) through an elastic member. A drug - injection channel (408) is also provided inside the side wall of the drug - injection duct (410). The drug - injection channel (408) is provided with an outlet (409). The outlet (409) is arranged on the inner side wall of the drug - injection duct (410). The distance between the outlet (409) and the end of the drug - injection duct (410) placed in the uterine cavity is less than the distance between the scraper (407) and the end of the drug - injection duct (410) placed in the uterine cavity. The drug - injection channel (408) is connected to a drug - injection interface (2). A protective device (5) that can communicate with the uterine cavity is arranged at the end of the drug - injection duct (410) placed in the uterine cavity.

2. The intrauterine perfusion catheter according to claim 1, characterized in that: A first groove (404) with a sealing device is provided inside the side wall of the drug - injection duct (410). The first groove (404) is connected to an elastic member, and the elastic member is connected to the scraper (407). The sealing device is two sealing - connected sealing strips.

3. The intrauterine perfusion catheter according to claim 2, wherein: The elastic member is a telescopic spring (405). One end of the telescopic spring (405) is connected to one side of the first groove (404), and the other end is connected to the scraper (407) through a connecting plate (406). The connecting plate (406) is placed in the first groove (404), and at least two end faces of the connecting plate (406) are in contact with the first groove (404), and the remaining one end face extends out between the two sealing strips after being in contact with the sealing strip and is connected to the scraper (407).

4. The intrauterine perfusion catheter according to claim 1, wherein: The protective device (5) includes a second groove (403) arranged on one side of the double - lumen catheter body (4). The second groove (403) is arranged at the end of the drug - injection duct (410) placed in the uterine cavity. The second groove (403) is an annular groove. An elastic airbag (501) is sealing - connected to the second groove (403). Several through - holes (502) are provided on the elastic airbag (501), and protective opening membranes are arranged in each of the through - holes (502).

5. The intrauterine perfusion catheter according to claim 4, characterized in that: The elastic airbag (501) is connected to an air - transmission channel (503). The air - transmission channel (503) is arranged in the side wall of the double - lumen catheter body (4). One side of the double - lumen catheter body (4) placed outside is connected to an air - transmission tube (3). One end of the air - transmission tube (3) is communicated with the air - transmission channel (503), and the other end is connected to an air - transmission interface. The air - transmission interface is detachably connected to an air - transmission device.

6. A uterine cavity perfusion catheter according to any one of claims 1-5, characterized in that: Both the drug - injection channel (408) and the outlet (409) are inclined.

7. A uterine cavity perfusion catheter according to any one of claims 1-5, characterized in that: A scale (401) is arranged on the outer side wall of the double - lumen catheter body (4).

8. A uterine cavity perfusion catheter according to any one of claims 1-5, characterized in that: The drainage duct (402) is provided with a drainage port on one side placed in the uterine cavity and a drainage interface (1) on one side placed outside.

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