Multifunctional silicone balloon cavity drainage device

Abstract

This invention provides a multifunctional silicone balloon body cavity drainage device, belonging to the field of medical device technology. It includes a drainage balloon and a drainage tube connected to it. An interventional catheter is detachably connected to the end of the drainage tube furthest from the drainage balloon. The interventional catheter has a drainage channel inside, and when the drainage tube is connected to the interventional catheter, the drainage channel communicates with the internal channel of the drainage tube. This invention improves the balloon's structure, enabling it to maintain a stable predetermined shape after inflation with a medium. This effectively avoids the problems of excessive expansion in the middle and contraction at both ends of traditional fusiform balloons, as well as unilateral bulging distortion caused by tissue compression. The inflated balloon forms uniform and sufficient contact with the body cavity wound surface, resulting in a more balanced contact pressure distribution. This overcomes the defect of traditional balloons where only the central area contacts soft tissue, leading to excessively high local pressure. It reduces the risk of tissue pressure injury caused by balloon bulging distortion and improves the safety of the drainage device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multifunctional silicone balloon body cavity drainage device. Background Technology

[0002] A negative pressure drainage ball is a medical tool that can generate and maintain a pressure below atmospheric pressure. It is mainly used for continuous and controllable suction of fluid in wounds or body cavities. Its core principle is to generate negative pressure by maintaining a tight seal and using squeezing and rebound mechanisms to achieve continuous suction and stable drainage of fluid in wounds or body cavities. It is widely used in clinical scenarios such as drainage of abscesses, postoperative residual cavities, and abdominal and pelvic effusions. Existing silicone balloon body cavity drainage devices generally use a balloon to fix the cavity and are equipped with a drainage channel to complete the drainage of effusion.

[0003] When the balloon of an existing balloon drainage tube is inflated with a medium, it tends to form a spindle-shaped structure. The middle part of the balloon is over-expanded while the two ends contract. When it is compressed by the tissue inside the body cavity, it is easy to cause unilateral bulging distortion. This distortion results in insufficient contact between the balloon and the wound surface in the body cavity, with only the middle area of ​​the balloon able to contact the soft tissue. This can easily cause excessive local pressure and damage to the tissue. On the other hand, the large outward expansion of the spindle-shaped balloon can easily push surrounding organs and soft tissues to adhere to the drainage port, causing the drainage port to be blocked and affecting the smooth flow of drainage.

[0004] In clinical practice, balloon bulging deformities are usually addressed by passively adjusting the amount of filling medium and gently shaking the catheter externally. However, this adjustment method is a reactive measure. Once the balloon has deformed, it is difficult to restore the already bulging balloon to its ideal shape. Due to the constraints of internal tissue space, the operation effect is uncontrollable. Repeated adjustments can also disturb the internal wound, increasing patient discomfort and the risk of bleeding.

[0005] In addition, to meet the clinical needs of drug delivery, some drainage devices can spray medication into the body cavity through the catheter delivery channel. However, the pressure contact surface where the balloon presses against the organ tissue after inflation is completely blocked by the balloon wall, making it difficult for the sprayed medication to penetrate into the contact interface, thus creating a dead zone for drug delivery. Therefore, this application provides a multifunctional silicone balloon body cavity drainage device to meet the needs. Summary of the Invention

[0006] The purpose of this invention is to provide a multifunctional silicone balloon cavity drainage device to solve the above-mentioned problems. By improving the balloon structure, the balloon maintains a stable predetermined shape after inflation, thus solving the technical problems of tissue damage caused by eccentric deformation of traditional balloons, blockage of drainage ports, and inability of drugs to penetrate into the interface between the balloon and the tissue.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A multifunctional silicone balloon body cavity drainage device includes a drainage ball and a drainage tube connected thereto. An interventional catheter is detachably connected to one end of the drainage tube away from the drainage ball. The interventional catheter has a drainage channel inside. When the drainage tube is connected to the interventional catheter, the drainage channel is connected to the internal channel of the drainage tube. The interventional catheter has multiple drainage ports arranged in a circumferential array inside, and the drainage ports are connected to the drainage channel. A balloon is provided on the outside of the interventional catheter, and multiple ribs are arranged in a circumferential array on the inner wall of the balloon to guide its expansion path when the balloon is inflated. The interventional catheter has a drug delivery chamber and a flushing chamber on both sides of the drainage port, and the inner wall of the balloon has multiple first nozzles and second nozzles arranged in a circumferential array, which are respectively connected to the drug delivery chamber and the flushing chamber.

[0008] Optionally, the inlet of the drainage port is provided with a concave slope, and the concave slope extends to the inside of the interventional catheter to reduce the risk of soft tissue being absorbed and blocked by negative pressure.

[0009] Optionally, both the first and second spray holes are inclined and their openings face one side of the drain port.

[0010] Optionally, pressure rings are respectively provided on the outside of the interventional catheter and at both ends of the balloon, and the pressure rings are fixed at the connection position between the balloon and the interventional catheter to constrain the shape of the balloon when it inflates.

[0011] Optionally, a clamp is provided on the outside of the drainage tube, and a gradually changing opening is provided inside the drainage tube to open or cut off the fluid passage of the drainage tube.

[0012] Optionally, the top of the drainage ball is provided with an exhaust pipe, and the outside of the exhaust pipe is provided with a detachable sealing cap to balance the internal air pressure of the drainage ball. A drainage bag is provided below the drainage ball, and a drain pipe connected to the drainage bag is provided at the bottom of the drainage ball.

[0013] Optionally, the balloon has an annular structure, and an annular gap is formed between the balloon and the interventional catheter. The interventional catheter has a first channel communicating with the annular gap, which is used to fill or extract the medium into the annular gap to achieve the expansion and contraction of the balloon.

[0014] Optionally, the interventional catheter is further provided with a second channel and a third channel, which are respectively connected to the drug delivery chamber and the flushing chamber. Luer connectors are provided at the entrances of the first channel, the second channel and the third channel for connecting external infusion devices.

[0015] Optionally, the balloon has multiple drug storage chambers arranged in a circumferential array inside, and each drug storage chamber has a sealing part at its opening. The sealing part is integrally formed with the balloon, and the sealing part has a drug release incision for closing or opening as the balloon deforms.

[0016] Optionally, the drug storage chamber is a closed chamber, and the drug is pre-placed inside the drug storage chamber. When the balloon is in a deflated state, the drug release incision of the sealing part is closed by the elasticity of silicone. When the balloon is inflated and stretched, the drug release incision is opened to release the drug, which is used to release the drug to the part where the balloon is attached to the organ.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: In the above-mentioned solution, the multifunctional silicone balloon body cavity drainage device provided in this application improves the structure of the balloon so that the balloon can maintain a stable predetermined shape after being filled with medium and expanded. This effectively avoids the problems of excessive expansion in the middle and contraction at both ends of the traditional spindle-shaped balloon, as well as unilateral bulging and distortion after being squeezed by tissue. The expanded balloon forms a uniform and sufficient contact with the body cavity wound, and the contact pressure distribution is more balanced. This overcomes the defect of traditional balloons that only contact the soft tissue in the middle area, resulting in excessive local pressure. It also reduces the risk of tissue pressure injury caused by balloon bulging and distortion, and improves the safety of the drainage device. Because the balloon maintains a stable predetermined shape within the body cavity, it avoids the problem of traditional balloons expanding outwards from the middle, pushing surrounding organs and soft tissues to adhere to the drainage port. The drainage port is less likely to be blocked, ensuring the continuous patency of the drainage channel. Compared to the passive adjustment method commonly used in clinical practice, the balloon of this invention can maintain a stable shape without post-operative intervention, avoiding repeated adjustments that disturb the wound surface and the resulting patient discomfort and bleeding risk. Furthermore, after the balloon inflates, even when it adheres to the organ tissue, the drug released through the release port can still effectively penetrate the interface between the balloon and the tissue, avoiding the defect in traditional devices where the balloon wall completely blocks the contact surface, preventing the drug from reaching that area. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the multifunctional silicone balloon cavity drainage device of the present invention; Figure 2 This is a schematic diagram of the overall structure of the interventional catheter of the present invention; Figure 3 This is a cross-sectional schematic diagram of the interventional catheter and balloon of the present invention; Figure 4 This is a partial cross-sectional view of the interventional catheter of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of balloon dilation according to the present invention; Figure 8 This is a partial schematic diagram of the interventional catheter of Embodiment 2 of the present invention; Figure 9 For the present invention Figure 8 A partial sectional view; Figure 10 For the present invention Figure 9 Enlarged diagram of point C in the middle.

[0020] Figure label: 1. Drainage ball; 11. Drainage tube; 12. Exhaust tube; 2. Drainage bag; 3. Drainage tube; 31. Tube clamp; 4. Interventional catheter; 42. Drainage channel; 43. Drainage port; 44. Balloon; 441. Rib; 442. Pressure ring; 443. First channel; 445. Drug storage chamber; 446. Sealing part; 45. Drug delivery chamber; 451. First nozzle; 452. Second channel; 46. Flushing chamber; 461. Second nozzle; 462. Third channel; 5. Luer connector.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0022] The following is a detailed description of a multifunctional silicone balloon cavity drainage device provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods 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.

[0023] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0024] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0025] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0026] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly. Example

[0027] like Figures 1 to 7 As shown, an embodiment of the present invention provides a multifunctional silicone balloon body cavity drainage device, including a drainage ball 1 and a drainage tube 3 connected thereto. A tube clamp 31 is provided on the outside of the drainage tube 3, and a gradually changing opening is provided inside the drainage tube 3 for opening or cutting off the fluid passage of the drainage tube 3. The tube clamp 31 can flexibly control the opening and closing of the drainage passage according to the clinical conditions, which is convenient for temporarily closing the drainage for drug administration and flushing operations. The top of the drainage ball 1 is provided with an exhaust pipe 12, and the outside of the exhaust pipe 12 is provided with a detachable sealing cover to balance the internal air pressure of the drainage ball. The exhaust pipe 12 opens when the drainage ball 1 is compressed and vented, so that the air inside the ball can be discharged smoothly. When the drainage ball 1 generates negative pressure by relying on elastic recovery, the sealing cover remains closed to ensure the negative pressure environment inside the ball. A drainage bag 2 is provided below the drainage ball 1, and a drainage tube 11 connected to the drainage bag 2 is provided at the bottom of the drainage ball 1. The drainage ball 1 and the drainage bag 2 are arranged in series, which can increase the fluid collection space. Compared with a single drainage ball 1 or drainage bag 2 structure, the fluid storage capacity of the whole device can be increased, and the usage time of a single drainage operation can be extended. Especially in the nighttime use scenario, it is inconvenient for patients to perform frequent drainage operations while resting in bed. The larger fluid storage capacity can support the continuous drainage needs throughout the night. The end of the drainage tube 3 away from the drainage ball 1 is detachably connected to the interventional catheter 4. The interventional catheter 4 has a drainage channel 42 inside. When the drainage tube 3 is connected to the interventional catheter 4, the drainage channel 42 is connected to the internal channel of the drainage tube 3. The interventional catheter 4 has multiple drainage ports 43 arranged in a circumferential array inside, and the drainage ports 43 are connected to the drainage channel 42. The multiple drainage ports 43 distributed in a circumferential array enable the drainage tube 3 to have multi-angle and multi-directional drainage capabilities in the body cavity. When the drainage port 43 in one direction is attached to or blocked by tissue, the drainage ports 43 in other directions can still remain unobstructed, thereby improving the reliability of drainage and reducing drainage dead zones and fluid accumulation. Furthermore, the inlet of the drainage port 43 is provided with a concave slope, which extends towards the inside of the interventional catheter 4 to reduce the risk of soft tissue being sucked up and blocking the drainage port 43 by negative pressure. The concave slope makes the inlet of the drainage port 43 appear to be inward. When the soft tissue in the body cavity is sucked towards the drainage port 43 under negative pressure, the concave slope can play a guiding and diversion role, allowing the tissue to slide along the slope into the drainage channel 42, thereby reducing the possibility of tissue blocking the drainage port 43. A balloon 44 is provided on the outside of the interventional catheter 4, and multiple ribs 441 are arranged in a circumferential array on the inner wall of the balloon 44 to guide its expansion path when the balloon 44 is inflated. The ribs 441 extend axially and provide uniform constraint force on the radial expansion of the balloon wall when the balloon 44 is inflated, which can prevent the balloon 44 from expanding to a skewed or skewed position and reduce the discomfort caused to the patient by repeatedly adjusting the balloon 44. Pressure rings 442 are provided on the outside of the interventional catheter 4 and at both ends of the balloon 44. The pressure rings 442 are fixed at the connection position between the balloon 44 and the interventional catheter 4 and are used to constrain the shape of the balloon 44 when it is inflated. When the balloon 44 is filled with medium and expands, it is constrained and guided by the ribs 441 and the pressure rings 442 to form a multi-faceted lantern-shaped configuration, thereby overcoming the spindle shape formed by the traditional balloon 44 after being filled with fluid. At the same time, the lantern-shaped configuration can support the annular gap on the outside of the drainage port 43 to avoid the soft tissue of the organ directly covering and blocking the drainage. Furthermore, the balloon 44 has an annular structure, and an annular gap is formed between the balloon 44 and the interventional catheter 4. The interventional catheter 4 has a first channel 443 that communicates with the annular gap, which is used to fill or extract the medium into the annular gap to achieve the expansion and contraction of the balloon 44. Inside the interventional catheter 4, on both sides of the drainage port 43, there are drug delivery chambers 45 and flushing chambers 46 respectively. The inner wall of the balloon 44 has multiple first nozzles 451 and second nozzles 461 arranged in a circumferential array, which are respectively connected to the drug delivery chambers 45 and flushing chambers 46. The first nozzles 451 and second nozzles 461 are both inclined and their openings face one side of the drainage port 43. The drug delivery chambers 45 and flushing chambers 46 are located on both sides of the drainage port 43, so that the drug delivery and flushing functions can be performed independently without interference. The inclined nozzles make the drug and flushing fluid directional when they are sprayed, both spraying towards the drainage port 43. The inclined sprayed medium can form a directional flush on the drainage port 43 and its entrance, effectively flushing away blood clots, tissue fragments, etc. attached to the drainage port 43, preventing the drainage port 43 from being blocked. The flushed blood clots and tissue fragments are then sucked into the drainage channel 42 through the drainage port 43 and discharged from the body under the action of the drainage negative pressure. The interventional catheter 4 is also provided with a second channel 452 and a third channel 462, which are connected to the drug delivery chamber 45 and the flushing chamber 46, respectively. Luer connectors 5 are provided at the entrances of the first channel 443, the second channel 452 and the third channel 462 for connecting external infusion devices. The drainage channel 42, the first channel 443, the second channel 452 and the third channel 462 in the interventional catheter 4 are isolated from each other and are not fluidly connected to each other to avoid cross-contamination and backflow between different channels.

[0028] The working principle of this embodiment: In use, the interventional catheter 4 is first inserted into the target body cavity. The catheter tip is confirmed to have reached the predetermined drainage position by imaging means such as B-ultrasound or X-ray. Then, gas or saline is filled into the annular gap between the balloon 44 and the interventional catheter 4 through the first channel 443. The balloon 44 gradually expands under the action of the filling medium. The ribs 441 on the inner wall of the balloon 44 constrain and guide the expansion path of the balloon 44. With the limiting effect of the pressure rings 442 at both ends, the balloon 44 expands evenly and regularly and fits against the inner wall of the body cavity, thereby firmly fixing the interventional catheter 4 in the body cavity and preventing slippage and displacement. After the balloon 44 is fixed, the drainage ball 1 generates negative pressure under the action of natural elastic recovery force. This negative pressure is transmitted to the drainage port 43 through the internal channel of the drainage tube 3 and the drainage channel 42. The fluid in the body cavity enters the drainage channel 42 from the drainage port 43 under the action of negative pressure, and then flows into the drainage ball 1 and the drainage bag 2 through the drainage tube 3 to complete the collection. During this process, the concave slope at the entrance of the drainage port 43 can effectively reduce the probability of soft tissue being aspirated into the drainage port 43. The multiple drainage ports 43 arranged in a circumferential array ensure that even if some drainage ports 43 are attached and blocked, other drainage ports 43 can still remain unobstructed. During the drainage process, when local drug administration is required, a syringe is connected through the Luer connector 5 on the second channel 452, and the drug solution is injected into the drug administration chamber 45 through the second channel 452. The drug solution is sprayed obliquely from the first nozzle 451 on the inner wall of the balloon 44, spraying towards the lesion tissue around the drainage port 43, achieving precise local drug administration. When the drainage port 43 needs to be flushed, a syringe is connected through the Luer connector 5 on the third channel 462, and the flushing solution is injected into the flushing chamber 46 through the third channel 462. The flushing solution is sprayed obliquely from the second nozzle 461 on the inner wall of the balloon 44, directionally flushing the drainage port 43 and the surrounding area, removing blood clots or tissue fragments adsorbed at the drainage port 43, restoring or maintaining the patency of the drainage port 43. During the entire drainage process, the drainage speed can be controlled by adjusting the opening degree of the tube clamp 31, or the drainage path can be temporarily cut off to cooperate with drug administration, flushing and other operations. After the drainage is completed, the filling medium in the balloon 44 is withdrawn through the first channel 443, the balloon 44 deflates and returns to its initial state, releasing its adhesion and fixation to the inner wall of the body cavity. Then, the interventional catheter 4 and the balloon 44 are pulled out of the body cavity together, completing the entire drainage operation. Example

[0029] This embodiment is a further improvement on embodiment 1, and the difference from embodiment 1 is as follows: like Figures 8 to 10As shown, this embodiment also includes multiple drug storage chambers 445 arranged in an array along the inner circumference of the balloon 44, and each drug storage chamber 445 has a sealing part 446 at its opening. The sealing part 446 is integrally formed with the balloon 44, and a drug release incision is provided at the sealing part 446 to achieve the closure or opening of the incision as the balloon 44 deforms. The drug storage chamber 445 is a closed chamber, and the drug is pre-placed inside the drug storage chamber 445. When the balloon 44 is in a deflated state, the drug release incision of the sealing part 446 is closed by the elasticity of silicone. When the balloon 44 is expanded and stretched, the drug release incision is opened to release the drug to the part of the balloon 44 that is in contact with the organ.

[0030] The working principle of this embodiment: The core difference between this embodiment and Embodiment 1 lies in the method of drug loading and release. This embodiment uses pre-loaded drug in vitro and in vivo targeted release.

[0031] Before the device is used, that is, before the interventional balloon 44 is inserted into the body, gas or saline is first injected into the annular gap of the balloon 44 through the first channel 443, so that the balloon 44 is pre-inflated outside the body. When the balloon 44 inflates, the sealing part 446 is stretched along with the balloon wall, and the drug release incision at the sealing part 446 is opened under the stretching action. At this time, the opening of the drug storage chamber 445 is in an open state. Then, the balloon 44 is placed into the drug bottle, and the drug bottle is shaken to allow the drug to enter the drug storage chamber 445. Subsequently, the filling medium in the annular gap of the balloon 44 is withdrawn through the first channel 443, or the drug is placed into the drug storage chamber 445 using a special tool. The balloon 44 deflates and returns to its original state, and the sealing part 446 returns to its original thickness. The drug release incision closes again by the elastic recoil force of the silicone material itself, completely sealing the drug in the drug storage chamber 445. After the drug is loaded and sealed, the interventional catheter 4 is inserted into the target body cavity, and the balloon 44 fixation operation in Example 1 is repeated. The medium is filled into the annular gap of the balloon 44 again through the first channel 443. The balloon 44 expands a second time in the body cavity. At this time, the expansion of the balloon 44 stretches the sealing part 446 again, the drug release incision is opened, the opening of the drug storage chamber 445 is opened again, and the pre-loaded drug is released from the drug storage chamber 445, which directly acts on the surrounding tissues that are in contact with the inner wall of the body cavity, so as to achieve the point-to-point and directional release of the drug.

[0032] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multifunctional silicone balloon cavity drainage device, characterized in that, It includes a drainage ball (1) and a drainage tube (3) connected thereto. The end of the drainage tube (3) away from the drainage ball (1) is detachably connected to an interventional catheter (4). The interventional catheter (4) has a drainage channel (42) inside. When the drainage tube (3) is connected to the interventional catheter (4), the drainage channel (42) is connected to the internal channel of the drainage tube (3). The interventional catheter (4) has multiple drainage ports (43) arranged in a circumferential array inside, and the drainage ports (43) are connected to the drainage channel (42). A balloon (44) is provided on the outside of the interventional catheter (4), and multiple ribs (441) are arranged in a circumferential array on the inner wall of the balloon (44) to guide its expansion path when the balloon (44) expands. The interventional catheter (4) has a drug delivery chamber (45) and a flushing chamber (46) respectively located on both sides of the drainage port (43), and the inner wall of the balloon (44) has a plurality of first nozzles (451) and second nozzles (461) respectively connected to the drug delivery chamber (45) and the flushing chamber (46) in a circumferential array.

2. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, The inlet of the drainage port (43) is provided with a concave slope, and the concave slope extends to the inside of the interventional catheter (4) to reduce the risk of soft tissue being absorbed and blocked by negative pressure.

3. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, The first nozzle (451) and the second nozzle (461) are both inclined and their openings face the side of the drain (43).

4. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, Pressure rings (442) are respectively provided on the outside of the interventional catheter (4) and at both ends of the balloon (44). The pressure rings (442) are fixed at the connection position between the balloon (44) and the interventional catheter (4) to constrain the shape of the balloon (44) when it inflates.

5. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, The drainage tube (3) is provided with a tube clamp (31) on the outside and a gradually changing opening is provided inside the drainage tube (3) for opening or cutting off the fluid passage of the drainage tube (3).

6. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, The top of the drainage ball (1) is provided with an exhaust pipe (12), and the outside of the exhaust pipe (12) is provided with a sealing cap that can be inserted and removed to balance the internal air pressure of the drainage ball. A drainage bag (2) is provided below the drainage ball (1), and a drain pipe (11) connected to the drainage bag (2) is provided at the bottom of the drainage ball (1).

7. The multifunctional silicone balloon cavity drainage device according to claim 1, characterized in that, The balloon (44) has an annular structure, and an annular gap is formed between the balloon (44) and the interventional catheter (4). The interventional catheter (4) has a first channel (443) inside that communicates with the annular gap, which is used to fill or extract the medium into the annular gap to achieve the expansion and contraction of the balloon (44).

8. The multifunctional silicone balloon cavity drainage device according to claim 7, characterized in that, The interventional catheter (4) is further provided with a second channel (452) and a third channel (462), and the second channel (452) and the third channel (462) are respectively connected to the drug delivery chamber (45) and the flushing chamber (46). Luer connectors (5) are provided at the entrances of the first channel (443), the second channel (452) and the third channel (462) for connecting external infusion devices.

9. The multifunctional silicone balloon cavity drainage device according to any one of claims 1-8, characterized in that, Multiple drug storage chambers (445) are arranged in a circular array inside the balloon (44), and each drug storage chamber (445) has a sealing part (446) at its opening. The sealing part (446) is integrally formed with the balloon (44), and a drug release incision is provided at the sealing part (446) to achieve the closure or opening of the incision as the balloon deforms.

10. The multifunctional silicone balloon cavity drainage device according to claim 9, characterized in that, The drug storage chamber (445) is a closed chamber. The drug is pre-placed inside the drug storage chamber (445). When the balloon (44) is in a deflated state, the drug release incision of the sealing part (446) is closed by the elasticity of silicone. When the balloon (44) is expanded and stretched, the drug release incision is opened to release the drug, which is used to release the drug to the part of the balloon (44) that is attached to the organ.

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