Intracavity treatment catheter

Abstract

The invention provides an intracavity treatment catheter, and belongs to the technical field of intracavity catheters. Comprising a guide pipe assembly, the guide pipe assembly comprises a connecting pipe, a cover body and a guide pipe body, and the cover body and the guide pipe body are in threaded connection with the two ends of the connecting pipe; the buckle assembly is fixedly connected to the interior of the connecting pipe; the medicine discharging assembly is arranged in the cover body in an annular array mode and used for releasing medicine. According to the scheme, through cooperation of the elastic buckle, the elastic piston, the annular groove, the round rod and other structures, the situation that excessive medicine is left in the catheter and waste is caused can be avoided, and at the moment, the medicine is squeezed into the cover body under the action of the elastic force of the elastic piston; the medicine is firstly jacked up through the adjusting hole to enable the T-shaped pipeline to be communicated with the inside of the human body, then the medicine is released into the intestinal tract of the human body through the two ends of the top of the T-shaped pipeline, and at the moment, the situation that a large amount of medicine is left in the catheter can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of intracavitary catheters, and in particular to an intracavitary therapeutic catheter. Background Art

[0002] Intracavitary therapeutic catheters are key tools in modern medicine, mainly used for diagnosis and treatment through narrow or occluded areas in the human body. Through precise design and material selection, this catheter can safely and effectively guide medical equipment and drugs to the target area, reduce surgical trauma, and improve treatment efficiency. For patients who need abdominal cavity (organs such as the small intestine and large intestine) treatment, doctors usually use a catheter to enter the designated position of the small intestine or large intestine, and then inject drugs into the pipeline by using a syringe to ensure that the drugs can be quickly delivered to the human body. However, in the above process, a large amount of drugs will be retained in this section of the catheter between the outside of the human body and the lesion site. In order to avoid excessive drugs injected into the human body, the residual drugs in the catheter need to be removed, and these drugs cannot be used again, which leads to drug waste. Therefore, in order to solve the above problems, an intracavitary therapeutic catheter is proposed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intracavitary treatment catheter to solve the problem that more drugs are wasted when injecting drugs into the human body through the catheter.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: To achieve the above objectives, the present invention provides the following technical solutions: An intracavitary treatment catheter, comprising a catheter assembly, the catheter assembly comprising a connecting tube and a cover body and a catheter body threadedly connected to both ends thereof, and also comprising: a piston assembly, which is arranged in the middle of the connecting tube; a buckle assembly, which is fixedly connected to the inside of the connecting tube; a medicine discharging assembly, whose annular array is arranged inside the cover body for medicine release; wherein the piston assembly comprises a second ring block fixedly connected to the inside of the connecting tube, a round rod rotatable inside the cover body is movably connected inside the second ring block, an elastic piston elastically connected to the inside of the connecting tube is sleeved on the inner and outer sides of the round rod, and the first A limiting rod sleeved inside the elastic piston is also fixedly connected to one side of the second ring block, an adjusting ring is fixedly connected to the end of the round rod away from the second ring block, and a circular array of adjusting holes is provided on the adjusting ring; a convex column is fixedly connected to the inside of the elastic piston, and a horizontal groove and an arc-shaped oblique groove are provided on the outside of the round rod; the convex column slides from the horizontal groove to the arc-shaped oblique groove with the elastic piston, and slides in the arc-shaped oblique groove to force the round rod to drive the adjusting ring to rotate, thereby gradually increasing the connecting part between the adjusting hole and the medicine dispensing component; after the elastic piston is unlocked by adjusting the buckle assembly, the medicine inside the connecting tube is pushed into the cover body under the action of its own elastic force, and the medicine enters the medicine dispensing component through the adjusting hole and is released into the patient's intestine by the medicine dispensing component.

[0005] Optionally, the horizontal length of the horizontal groove and the arc-shaped inclined groove is one third of the total length of the round rod, and the surface of a section of the round rod between the horizontal groove and the second ring block is smooth and the length is one third of the total length of the round rod.

[0006] Optionally, a sealing ring that can slide on a smooth section of the round rod is fixedly installed at one end of the elastic piston near the second ring block, and the medicine is stored in a cavity surrounded by the connecting tube, the cover body and the elastic piston.

[0007] Optionally, the medicine discharging assembly includes a threaded sleeve threadedly connected to the inside of the cover body and an elastic medicine discharging port elastically connected to the inside of the threaded sleeve; a T-shaped pipe is opened inside the elastic medicine discharging port; when the convex column slides in the horizontal groove, the medicine inside the cover body squeezes the elastic medicine discharging port upward and connects the top of the T-shaped pipe with the outside world, and then the medicine enters the threaded sleeve through the adjusting hole and is released to both sides through the top of the T-shaped pipe.

[0008] Optionally, the buckle assembly includes a first ring block fixed to the inside of the connecting tube; two groups of elastic buckles elastically hinged on the first ring block; a sliding sleeve movably mounted on the end of the round rod; a straight groove is opened in the middle of the elastic buckle, and the sliding sleeve is moved to make the pin shaft arranged on it slide in the straight groove, so that one end of the elastic buckle is disengaged from the annular groove opened on the elastic piston.

[0009] Optionally, the elastic buckle includes two parts, a spring sheet and a buckle, wherein one end of the buckle is hinged to the first ring block, and the other end is snapped into the annular groove; one end of the spring sheet supports the buckle to be snapped into the annular groove, and the other end abuts against the inner wall of the connecting tube.

[0010] Optionally, the distance between the hinged joints of the two groups of elastic buckles is smaller than the distance between one end of the buckle inserted into the annular groove.

[0011] Optionally, a traction wire is fixedly connected to one end of the sliding sleeve away from the round rod, and the length of the traction wire is greater than the catheter body.

[0012] Optionally, a one-way valve is fixedly connected to one end of the round rod close to the cover body; a one-way valve is opened at the end of the round rod for inputting medicine into the cover body through the through hole in one direction; and a rubber cover is also installed at the end of the round rod for sealing the input end of the one-way valve.

[0013] Optionally, the medicine dispensing assembly further comprises a ring sleeve which is detachably sleeved on the outside of the cover body and can be used to prevent the elastic medicine dispensing port from popping out.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The above scheme enables the device to avoid the situation where too much drug remains in the catheter and causes waste through the coordination between structures such as the elastic buckle, the elastic piston, the annular groove and the round rod. The traction belt is pulled to drive the pin on the sliding sleeve to slide in the straight groove, thereby forcing the elastic buckle to rotate and release the fixation of the elastic piston. At this time, the drug is squeezed into the cover body under the elastic force of the elastic piston itself. The drug first lifts the threaded sleeve through the adjustment hole to connect the T-shaped pipe with the human body, and then releases the drug into the human intestine through the two ends of the top of the T-shaped pipe. At this time, the device can avoid the situation where a large amount of drug remains in the catheter.

[0015] The above scheme enables the device to stably release drugs into the human body through the coordination between structures such as the convex column, horizontal groove, arc-shaped inclined groove and adjustment hole. When the convex column slides inside the horizontal groove, the elastic piston will push the drug to extrude the drug outlet component and connect it with the cover body. When the convex column slides in the arc-shaped inclined groove, the drug outlet component will release the drug into the human body and at the same time force the round rod to drive the adjustment ring to rotate, so that the area of ​​the cover body that can be connected with the threaded sleeve through the adjustment hole gradually increases, so as to avoid excessive pressure provided by the elastic piston initially, which will cause excessive pressure when the drug is released through the drug outlet component and cause discomfort to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the connecting pipe of the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 for Figure 2 The enlarged view of point B in the middle; Figure 5 An exploded view of the piston assembly of the present invention; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 for Figure 5 Enlarged view of point D in the middle Figure 8 It is a schematic diagram of the top cross-sectional structure of the connecting pipe of the present invention; Fig. 9 It is a structural schematic diagram of the piston assembly of the present invention; Fig.10 It is a structural schematic diagram of the buckle assembly of the present invention.

[0018] Reference numerals: 1. Catheter assembly; 11. Connecting tube; 12. Cover body; 13. Catheter body; 2. Buckle assembly; 21. First ring block; 22. Elastic buckle; 221. Straight groove; 23. Sliding sleeve; 231. Traction wire; 3. Piston assembly; 31. Second ring block; 32. Round rod; 321. Horizontal groove; 322. Arc-shaped inclined groove; 323. Through hole; 33. Elastic piston; 331. Boss; 332. Annular groove; 34. Limit rod; 35. Adjusting ring; 351. Adjusting hole; 36. Rubber cover; 37. One-way valve; 4. Medicine dispensing assembly; 41. Threaded sleeve; 42. Elastic medicine dispensing port; 43. Ring sleeve.

[0019] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0020] The following is a detailed description of an intracavitary treatment catheter provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0021] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0022] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0023] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0024] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0025] like Figures 1 to 10 As shown, the present invention provides an intracavitary treatment catheter, including a catheter assembly 1, the catheter assembly 1 includes a connecting tube 11 and a cover body 12 and a catheter body 13 threadedly connected to both ends thereof, and also includes: a piston assembly 3, which is arranged in the middle of the connecting tube 11; a buckle assembly 2, which is fixedly connected to the inside of the connecting tube 11; a drug discharging assembly 4, whose annular array is arranged inside the cover body 12 for drug release; wherein the piston assembly 3 includes a second ring block 31 fixedly connected to the inside of the connecting tube 11, a round rod 32 that can rotate inside the cover body 12 is movably connected inside the second ring block 31, an elastic piston 33 elastically connected to the inside of the connecting tube 11 is sleeved on the inside and outside of the round rod 32, a limiting rod 34 sleeved inside the elastic piston 33 is also fixedly connected to one side of the second ring block 31, and the round rod 3 An adjusting ring 35 is fixedly connected to one end away from the second ring block 31, and an adjusting hole 351 is arranged in a circumferential array on the adjusting ring 35; a convex column 331 is fixedly connected to the inside of the elastic piston 33, and a horizontal groove 321 and an arc-shaped oblique groove 322 are arranged on the outside of the round rod 32; the convex column 331 slides from the horizontal groove 321 to the arc-shaped oblique groove 322 along with the elastic piston 33, and slides in the arc-shaped oblique groove 322 to force the round rod 32 to drive the adjusting ring 35 to rotate, so that the connecting part of the adjusting hole 351 and the medicine discharging component 4 is gradually enlarged; after the elastic piston 33 is unlocked by adjusting the buckle assembly 2, the elastic piston 33 is pushed into the cover body 12 under the action of its own elastic force, and the medicine enters the medicine discharging component 4 through the adjusting hole 351 and is released into the patient's intestine by the medicine discharging component 4.

[0026] By adopting the above scheme, the pin shaft on the sliding sleeve 23 is driven to slide in the straight groove 221 by pulling the traction wire 231, thereby forcing the elastic buckle 22 to rotate and release the fixation of the elastic piston 33. At this time, the elastic piston 33 itself The elastic force squeezes the drug into the cover body 12, and the drug first passes through the adjustment hole 351 to lift the threaded sleeve 41 to connect the T-type pipe with the human body, and then releases the drug into the human intestine through the two ends of the top of the T-type pipe. At this time, the device can avoid the situation where a large amount of drug will remain in the catheter.

[0027] like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown, the horizontal length occupied by the horizontal groove 321 and the arc-shaped oblique groove 322 is one-third of the total length of the round rod 32, and the surface of the section of the round rod 32 located between the horizontal groove 321 and the second ring block 31 is smooth and the length is one-third of the total length of the round rod 32; a sealing ring that can slide on a smooth section of the round rod 32 is fixedly installed at one end of the elastic piston 33 near the second ring block 31, and the drug is stored in the cavity surrounded by the connecting tube 11, the cover body 12 and the elastic piston 33; the design of the smooth section on the round rod 32 ensures the sealing of the drug storage cavity inside the connecting tube 11, and at the same time avoids the situation that the drug leaks out of the cavity through the horizontal groove 321 and the arc-shaped oblique groove 322 when the elastic piston 33 moves; it is worth noting that when the elastic piston 33 is completely released by its own elastic force, a small amount of residual drug will be stored in the part between the inner wall of the elastic piston 33 and the outer wall of the round rod 32, which is greatly reduced compared with the amount of drug remaining in the catheter in the prior art.

[0028] like Figure 1 , Figure 4 and Fig. 9 As shown, the medicine discharging component 4 includes a threaded sleeve 41 threadedly connected to the inside of the cover body 12 and an elastic medicine outlet 42 elastically connected to the inside of the threaded sleeve 41, and a T-shaped pipe is opened inside the elastic medicine outlet 42; when the protruding column 331 slides in the horizontal groove 321, the medicine inside the cover body 12 squeezes the elastic medicine outlet 42 upward and makes the top of the T-shaped pipe communicate with the outside world, and then the medicine enters the threaded sleeve 41 through the adjusting hole 351 and is released to both sides through the top of the T-shaped pipe; the design that the elastic medicine outlet 42 moves outward under pressure and guides the medicine to both sides through the T-shaped pipe avoids the situation where the medicine directly impacts the inner wall of people's intestine when it is released outward.

[0029] like Figure 2 , Figure 5 , Figure 8 and Fig. 9As shown, the buckle assembly 2 includes a first ring block 21 fixed to the inside of the connecting pipe 11; two sets of elastic buckles 22 elastically hinged on the first ring block 21; a sliding sleeve 23 movably sleeved on the end of the round rod 32; a straight groove 221 is opened in the middle of the elastic buckle 22, and the sliding sleeve 23 is moved to make the pin arranged thereon slide in the straight groove 221, so that one end of the elastic buckle 22 is separated from the annular groove 332 opened on the elastic piston 33; the elastic buckle 22 includes two parts, a spring piece and a buckle, wherein one end of the buckle is connected to the elastic piston 33. The first ring block 21 is hinged, and the other end is stuck in the annular groove 332; one end of the spring sheet pushes the buckle to be stuck in the annular groove 332, and the other end abuts against the inner wall of the connecting tube 11; by pulling the traction wire 231, the pin shaft on the sliding sleeve 23 is driven to slide in the straight groove 221, thereby forcing the elastic buckle 22 to rotate and release the fixation of the elastic piston 33; and when the elastic piston 33 moves in the opposite direction, one end of the elastic piston 33 will also squeeze the inclined surface of the elastic buckle 22, and at the same time, it will be re-snaps into the annular groove 332 under the support of the spring sheet.

[0030] like Figure 2 and Fig. 9 , Fig.10 As shown, the spacing between the hinges of the two groups of elastic buckles 22 is smaller than the spacing between one end of the annular groove 332; a traction wire 231 is fixedly connected to the end of the sliding sleeve 23 away from the round rod 32, and its length is greater than the catheter body 13; by designing the spacing between the two ends of the elastic buckle 22, the elastic buckle 22 is set at an angle, thereby ensuring that when the pin shaft on the sliding sleeve 23 moves to the side away from the round rod 32, the end of the elastic buckle 22 that is stuck in the annular groove 332 can be separated from the annular groove 332.

[0031] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, a one-way valve 37 is fixedly connected to one end of the round rod 32 close to the cover body 12; the one-way valve 37 is opened at the end of the round rod 32 for inputting medicine into the cover body 12 through the through hole 323 in one direction; a rubber cover 36 for sealing the input end of the one-way valve 37 is also installed at the end of the round rod 32; the medicine dispensing component 4 also includes a ring sleeve 43 which is detachably mounted on the outside of the cover body 12 and can be used to prevent the elastic medicine outlet 42 from popping out.

[0032] After the device is used, after a series of cleaning and disinfection, in order to re-inject medicine into the connecting tube 11, after opening the rubber cover 36, people inject medicine into the cover body 12 into the through hole 323 through the one-way valve 37, and then inject the medicine into the connecting tube 11 along the rubber cover 36. Figure 4The white arrow shown enters the connecting tube 11, at which time the medicine will push the elastic piston 33 to reset and be locked by the snap assembly 2 again; in order to prevent the re-injected medicine from squeezing the elastic medicine outlet 42, people can prevent the movement of the elastic medicine outlet 42 by setting a ring sleeve 43 on the cover body 12 until the elastic piston 33 is reset, and then the ring sleeve 43 can be removed.

[0033] The working principle and use process of the present invention: First, the operator inserts the connecting tube 11 and the cover body 12 into the human intestine through the catheter body 13, and drives the pin shaft on the sliding sleeve 23 to slide in the straight groove 221 by pulling the traction wire 231, thereby forcing the elastic buckle 22 to rotate and release the fixation of the elastic piston 33. At this time, the elastic piston 33 squeezes the medicine into the cover body 12 under the elastic force of the elastic piston 33 itself. The medicine first passes through the adjustment hole 351 to lift the threaded sleeve 41 to connect the T-shaped pipe with the human body, and then releases the medicine into the human intestine through the two ends of the top of the T-shaped pipe.

[0034] During the movement of the elastic piston 33, the boss 331 will also be driven to slide inside the horizontal groove 321. During this process, the elastic piston 33 will push the drug extrusion and drug discharging component 4 to communicate with the cover body 12. When the boss 331 slides from the horizontal groove 321 to the arc-shaped inclined groove 322, the drug discharging component 4 will release the drug into the human body. Since the elastic piston 33 is limited by the limiting rod 34, the sliding of the boss 331 in the arc-shaped inclined groove 322 will also force the round rod 32 to drive the adjusting ring 35 to rotate, so that the area of ​​the cover body 12 that can be connected with the threaded sleeve 41 through the adjusting hole 351 gradually increases, so as to avoid excessive pressure provided by the elastic piston 33 at the beginning, thereby causing excessive pressure when the drug is released through the drug discharging component 4, causing discomfort to the human body.

[0035] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An intracavitary therapeutic catheter, characterized in that: The invention comprises a catheter assembly, wherein the catheter assembly comprises a connecting pipe and a cover body and a catheter body threadedly connected to both ends thereof, and is characterized in that it also comprises: A piston assembly, which is arranged in the middle of the connecting pipe; A buckle assembly, which is fixed inside the connecting pipe; A medicine dispensing assembly, the annular array of which is arranged inside the cover body for medicine release; The piston assembly comprises a second ring block fixedly connected to the inside of the connecting tube, a round rod movably connected to the inside of the second ring block and capable of rotating inside the cover body, an elastic piston elastically connected to the inside of the connecting tube is sleeved on the inside and outside of the round rod, a limiting rod sleeved inside the elastic piston is also fixedly connected to one side of the second ring block, an adjusting ring is fixedly connected to one end of the round rod away from the second ring block, and a circular array of adjusting holes is opened on the adjusting ring; A convex column is fixedly connected to the inside of the elastic piston, and a horizontal groove and an arc-shaped inclined groove are opened on the outside of the round rod; The convex column slides from the horizontal groove to the arc-shaped inclined groove along with the elastic piston, and slides in the arc-shaped inclined groove to force the round rod to drive the adjusting ring to rotate, so that the connecting part between the adjusting hole and the medicine discharging component is gradually enlarged; The elastic piston is unlocked by adjusting the buckle assembly so that the medicine in the connecting tube is pushed into the cover body under the action of its own elastic force. The medicine enters the medicine discharging assembly through the adjusting hole and is released into the patient's intestine by the medicine discharging assembly.

2. The intracavitary treatment catheter according to claim 1, characterized in that: The horizontal length of the horizontal groove and the arc-shaped inclined groove is one third of the total length of the round rod. The surface of a section of the round rod located between the horizontal groove and the second ring block is smooth and the length is one third of the total length of the round rod.

3. The intracavitary treatment catheter according to claim 2, characterized in that: A sealing ring which can slide on a smooth section of the round rod is fixedly installed at one end of the elastic piston close to the second ring block, and the medicine is stored in a cavity surrounded by the connecting pipe, the cover body and the elastic piston.

4. The intracavitary treatment catheter according to claim 1, characterized in that: The medicine discharging assembly comprises a threaded sleeve threadedly connected to the inside of the cover body and an elastic medicine discharging port elastically connected to the inside of the threaded sleeve; A T-shaped pipe is provided inside the elastic medicine outlet; When the convex column slides in the horizontal groove, the medicine inside the cover body is squeezed upward by the elastic medicine outlet and the top of the T-shaped pipe is connected with the outside world. Then the medicine enters the threaded sleeve through the adjustment hole and is released to both sides through the top of the T-shaped pipe.

5. The intracavitary treatment catheter according to claim 1, characterized in that: The buckle assembly includes a first ring block fixedly connected to the interior of the connecting pipe; Two sets of elastic buckles elastically hinged on the first ring block; A sliding sleeve movably mounted on the end of the round rod; A straight groove is provided in the middle of the elastic buckle, and the movable sliding sleeve makes the pin shaft arranged thereon slide in the straight groove, so that one end of the elastic buckle is separated from the annular groove provided on the elastic piston.

6. The intracavitary treatment catheter according to claim 5, characterized in that: The elastic buckle comprises two parts, a spring sheet and a buckle, wherein one end of the buckle is hinged to the first ring block, and the other end is clamped in the annular groove; One end of the spring sheet pushes the buckle to be clamped in the annular groove, and the other end abuts against the inner wall of the connecting pipe.

7. The intracavitary treatment catheter according to claim 6, characterized in that: The distance between the hinged parts of the two groups of elastic buckles is smaller than the distance between one end of the buckle inserted into the annular groove.

8. The intracavitary treatment catheter according to claim 5, characterized in that: A traction wire is fixedly connected to one end of the sliding sleeve away from the round rod, and the length of the traction wire is greater than the catheter body.

9. The intracavitary treatment catheter according to claim 1, characterized in that: A one-way valve is fixedly connected to one end of the round rod close to the cover body; A one-way valve is provided at the end of the round rod for inputting medicine into the cover body through the through hole in one direction; The end of the round rod is also equipped with a rubber cover for sealing the input end of the one-way valve.

10. The intracavitary treatment catheter according to claim 9, characterized in that: The medicine dispensing assembly also includes a ring sleeve which is detachably sleeved on the outside of the cover body and can be used to prevent the elastic medicine dispensing port from popping out.

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