Drainage device for endocrinology department

Abstract

The invention discloses a drainage device for the endocrinology department, and relates to the technical field of medical equipment, the drainage device comprises a drainage catheter and a liquid storage balloon, the middle of the drainage catheter is provided with a double-layer dropper, a cavity layer is arranged in the double-layer dropper, the bottom of the drainage catheter is provided with an expansion and contraction balloon used for being connected with the liquid storage balloon, and the cavity layer is provided with a cavity. Negative pressure suction force can be generated through periodic expansion and contraction movement of the expansion and contraction balloon, so that effusion of the lower half section of the drainage catheter is rapidly conveyed into the expansion and contraction balloon, intermittent air supply and air exhaust are conducted on the cavity layer of the double-layer dropper at the same time, and active drainage of effusion of the upper half section of the drainage catheter is achieved. Active drainage of effusion in the drainage catheter is achieved through the expansion and contraction balloon and the double-layer dropper, a two-section type drainage mechanism is integrally adopted, the effusion is rapidly sucked out, the drainage efficiency is improved, effusion retention and blockage are prevented, and air is automatically isolated and gas is prevented from entering the effusion storage balloon in the effusion drainage process through the sliding piece and the floating ball.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a drainage device for endocrinology department. BACKGROUND

[0002] The endocrinology department mainly deals with diseases related to hormone secretion, such as diabetes, thyroid problems, etc. In the treatment of certain specific diseases, such as abdominal effusion caused by severe pancreatitis, peripancreatic abscess, or after pancreatic surgery (such as pancreaticoduodenectomy), it is necessary to drain the inflammatory exudate and pancreatic juice leakage in the abdominal cavity to prevent infection and promote healing; The existing drainage device is mainly composed of a soft silicone drainage tube (placed in a designated part of the abdominal cavity) and a drainage ball at the end. Medical staff will focus on the amount, color (such as whether it is light red, yellow-green), and turbidity of the drainage fluid to evaluate the severity of the disease and the treatment effect; Before drainage, the drainage ball needs to be pinched to expel the internal air. After releasing the hand, a negative pressure is formed inside the ball, which can actively suck the liquid in the abdominal cavity into the ball, avoiding the accumulation of effusion in the local area, and achieving better drainage effect; However, the existing drainage device relies on pinching the drainage ball once to establish negative pressure, and the negative pressure value is fixed and cannot be regenerated. As the effusion continuously enters the drainage ball, the space inside the ball is occupied, and the negative pressure will continue to decrease until it disappears. The drainage speed gradually slows down from the initial fast speed, and in the later stage, the drainage may stop due to insufficient negative pressure, especially for pancreatic-related diseases (such as severe pancreatitis) that require long-term drainage, which may cause effusion to remain and cause the drainage operation to stop; In addition, the existing drainage device has a large amount of effusion or a relatively viscous effusion. The viscosity between the effusion and the drainage tube is large, and the viscous resistance between the liquid and the inner wall of the drainage tube is greater than the negative pressure suction force. The effusion is easily attached to the wall of the tube and flows slowly, and the medical staff need to frequently manually handle (such as squeezing the catheter), which reduces the overall drainage efficiency.

[0003] In view of the above problems, it is necessary to innovate and design on the basis of the original drainage device. SUMMARY

[0004] The technical solution of the present application provides a significantly different solution from the existing technology to solve the technical problem that the existing technology solution is too single. Specifically, the purpose of the present application is to provide a drainage device for endocrinology department to solve the problem that the existing drainage device may not have enough negative pressure suction or the effusion of the patient is too viscous, resulting in a decrease in drainage effect.

[0005] In order to achieve the above object, the present application provides the following technical scheme: An endocrinology department drainage device, comprising a drainage catheter and a liquid storage balloon, a double-layer dropper is arranged in the middle of the drainage catheter, and a cavity layer is arranged in the double-layer dropper, an expansion and contraction balloon for connecting the liquid storage balloon is arranged at the bottom of the drainage catheter, through the periodic expansion and contraction movement of the expansion and contraction balloon, negative pressure suction can be generated, so that the effusion in the lower half of the drainage catheter is quickly transported into the expansion and contraction balloon, and the cavity layer of the double-layer dropper is intermittently aerated and air-extracted at the same time, so that the active drainage of the effusion in the upper half of the drainage catheter is realized.

[0006] Preferably, the drainage catheter is divided into an upper catheter and a lower catheter, and the double-layer dropper is arranged between the upper catheter and the lower catheter. The two ends of the expansion and contraction balloon are respectively provided with a liquid inlet and a liquid outlet, a first one-way valve is arranged between the liquid inlet and the lower catheter, and a second one-way valve is arranged between the liquid outlet and the liquid storage balloon.

[0007] Preferably, the double-layer dropper is divided into an outer sleeve and an inner dropper, one end of the inner dropper is communicated with the upper catheter, the other end of the inner dropper is communicated with the lower catheter, and the cavity layer is arranged between the outer sleeve and the inner dropper.

[0008] Preferably, the outer sleeve is made of hard material, the inner dropper is made of flexible material, and a third one-way valve is arranged between the inner dropper and the upper catheter. Preferably, a gas guide pipe is connected between the top of the expansion and contraction balloon and the cavity layer of the double-layer dropper, through extruding the expansion and contraction balloon, the effusion in the expansion and contraction balloon can be unidirectionally transported into the liquid storage balloon, and at the same time, air is transported into the cavity layer through the gas guide pipe at the top, so as to extrude the inner dropper.

[0009] Preferably, a hollow pipe is inserted into the inner wall of the expansion and contraction balloon, a floating ball is slidably connected to the outside of the hollow pipe, and the floating ball can float up and down with the change of the liquid level of the effusion in the expansion and contraction balloon.

[0010] Preferably, a soft tube is fixedly connected to the top of the floating ball, a drainage channel is arranged in the inner wall of the floating ball, one end of the soft tube is communicated with the drainage channel, and the other end of the drainage channel extends to the outer surface of the floating ball.

[0011] Preferably, a strip-shaped opening is arranged in the side curved surface of the hollow pipe, a sliding piece is slidably connected to the inner wall of the hollow pipe, a protruding block is arranged on one side of the sliding piece, and the protruding block is fixedly connected to the inner wall of the floating ball through the strip-shaped opening.

[0012] Compared with the prior art, the present application has the following beneficial effects: By adding an expansion and contraction balloon capable of actively pumping hydrops between the storage balloon and the drainage catheter, the periodic expansion or contraction of the expansion and contraction balloon is used as the power source, and the patient can additionally increase the manual pinching operation according to the hydrops condition, and the pressurization of the expansion and contraction balloon can make the internal stored hydrops unidirectionally transported to the storage balloon through the second one-way valve, and when the expansion and contraction balloon is reset due to its own elasticity, the hydrops in the lower catheter is actively pumped, reducing the retention of hydrops in the lower catheter, and the whole structure forms a one-way drainage channel for hydrops, ensuring that the hydrops can only enter the expansion and contraction balloon from the drainage catheter, and then enter the storage balloon from the expansion and contraction balloon, avoiding the backflow of hydrops, and ensuring the safety and effectiveness of the drainage process; Moreover, a gas guide tube is added between the expansion and contraction balloon and the double-layer dropper, and when the expansion and contraction balloon performs periodic expansion or contraction movement, air is intermittently injected into the cavity layer of the double-layer dropper through the gas guide tube, and when the air is injected, the air pressure in the cavity layer increases, the inner layer dropper is extruded by the air pressure, and the hydrops in the inner layer dropper is driven to the lower catheter, and when the air is recovered, the inner layer dropper restores to the original state due to its own elasticity, and a negative pressure environment is formed in the recovery process, and the liquid accumulated in the upper catheter is sucked into the inner layer dropper, so that the purpose of actively pumping the internal hydrops of the upper catheter is achieved, and through the cooperation of the double-layer dropper and the expansion and contraction balloon, a two-stage drainage mechanism is formed, and the drainage process is synchronous, which can not only ensure that the lower hydrops is quickly and continuously transported to the storage balloon, but also provide continuous active drainage for the upper hydrops, reduce the retention time of the hydrops in the drainage catheter, and reduce the risk of blockage, even in the presence of inflammatory exudate, pancreatic juice and other hydrops with certain viscosity, the two-stage drainage mechanism and increased negative pressure suction can quickly pump out the hydrops, improving the drainage efficiency and effect; In addition, a hollow tube and a floating ball are installed in the expansion and contraction balloon, the floating ball can float up and down with the change of the liquid level of the hydrops in the expansion and contraction balloon, a through slot is arranged in the middle of the floating ball, the through slot slides along the hollow tube, a sliding piece is arranged on the inner wall of the hollow tube, a protrusion is arranged on one side of the sliding piece, the protrusion penetrates through the strip-shaped opening and is fixed with the through slot of the floating ball, and the sliding piece can slide up and down synchronously with the floating ball; during the drainage process, due to the existence of the strip-shaped opening on the hollow tube, even during the descending process of the floating ball, the normal flow of the hydrops is not hindered, the hydrops penetrates into the bottom of the hollow tube through the strip-shaped opening, and then unidirectionally flows into the storage balloon through the second one-way valve at the bottom. In addition, when the hydrops in the expansion and contraction balloon is gradually drained and the liquid level drops, the floating ball slides down synchronously, driving the sliding piece to slide to the bottom along the hollow tube, at this time, the sliding piece and the floating ball form a physical barrier together, automatically blocking the channel for air entering the storage balloon, preventing air from entering the storage balloon, and during the active drainage of the hydrops by the expansion and contraction balloon, the existing negative pressure suction of the storage balloon can also be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the whole structure of the present application.

[0014] Figure 2 This is a schematic cross-sectional view of the expandable balloon structure of the present invention.

[0015] Figure 3 This is a diagram showing the working state of the float in this invention.

[0016] Figure 4 This is an exploded view of the float, hollow tube, and hose of the present invention.

[0017] Figure 5 This is a schematic diagram of the connection structure between the drainage channel and the hose after cross-section of the float ball of the present invention.

[0018] Figure 6 This is a schematic diagram of the connection structure between the float and the slider in the present invention.

[0019] Figure 7 This is a schematic cross-sectional view of the double-layer dropper structure of the present invention.

[0020] Figure 8 This is a schematic diagram of the exploded structure of the double-layer dropper and drainage conduit of the present invention.

[0021] In the diagram: 1. Drainage catheter; 101. Upper catheter; 102. Lower catheter; 2. Reservoir balloon; 3. Hollow layer; 4. Expanding balloon; 401. Hollow tube; 402. Float; 403. Tube; 404. Drainage channel; 405. Sliding vane; 5. Outer sheath; 6. Inner drip tube; 7. First one-way valve; 8. Second one-way valve; 9. Third one-way valve; 10. Air delivery tube. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 8 The present invention provides a technical solution: a drainage device for endocrinology, including a drainage catheter 1 and a reservoir balloon 2. The drainage catheter 1 is provided with a double-layered dropper in the middle, and the double-layered dropper has a hollow layer 3 inside. The bottom of the drainage catheter 1 is equipped with a dilatation balloon 4 for connecting the reservoir balloon 2. Through the periodic expansion and contraction of the dilatation balloon 4, a negative pressure suction can be generated so that the fluid in the lower half of the drainage catheter 1 can be quickly transported into the dilatation balloon 4, and at the same time, the hollow layer 3 of the double-layered dropper is intermittently inflated and deflated to achieve active drainage of the fluid in the upper half of the drainage catheter 1. By adding a dilatation balloon 4 capable of actively aspirating effusion between the reservoir balloon 2 and the drainage catheter 1, and using the periodic expansion or contraction of the dilatation balloon 4 as a power source, patients can perform additional manual squeezing operations according to their own effusion situation. This can directly provide negative pressure suction to the lower half of the drainage catheter 1, accelerating the effusion into the dilatation balloon 4, and simultaneously perform intermittent air replenishment or aspiration of the cavity layer 3 of the double-layer drip tube, creating active suction for the upper half of the drainage catheter 1. On the one hand, this ensures that the effusion in the lower half is quickly and continuously delivered to the reservoir balloon 2, and on the other hand, through the intermittent air pressure changes in the cavity layer 3, it provides continuous active drainage for the effusion in the upper half, reducing the retention time of effusion in the drainage catheter 1 and reducing the risk of blockage. The entire process employs a two-stage drainage system, with the drainage process occurring simultaneously. This avoids drainage obstruction caused by viscous fluid accumulation or excessively long catheters. It is particularly suitable for scenarios involving inflammatory exudate or pancreatic juice in pancreatic-related diseases, which may have a certain degree of viscosity. This improves drainage efficiency and effectiveness. In actual use, medical staff can adjust the squeezing frequency and force of the balloon 4 in real time according to the patient's fluid accumulation and physical condition to achieve the best drainage effect.

[0024] In this embodiment, as Figure 1 , Figure 2 and Figure 7 As shown, the drainage catheter 1 is divided into an upper catheter 101 and a lower catheter 102, and a double-layer drip tube is placed between the upper catheter 101 and the lower catheter 102; The two ends of the expansion and contraction balloon 4 are respectively provided with a liquid inlet and a liquid outlet. A first one-way valve 7 is installed between the liquid inlet and the lower conduit 102, and a second one-way valve 8 is installed between the liquid outlet and the storage balloon 2. The double-layer dropper is divided into an outer sleeve 5 and an inner dropper 6. One end of the inner dropper 6 is connected to the upper conduit 101, and the other end of the inner dropper 6 is connected to the lower conduit 102. The cavity layer 3 is located between the outer sleeve 5 and the inner dropper 6. The outer sleeve 5 is made of rigid material, the inner dropper 6 is made of flexible material, and a third one-way valve 9 is installed between the inner dropper 6 and the upper conduit 101. An air guide tube 10 is connected between the top of the expansion balloon 4 and the cavity layer 3 of the double-layer dropper. By squeezing the expansion balloon 4, the accumulated liquid in the expansion balloon 4 can be transported unidirectionally to the reservoir balloon 2, and at the same time, air is transported through the air guide tube 10 at the top to the cavity layer 3 to squeeze the inner dropper 6. It should be noted that an inlet and an outlet are provided at both ends of the expansion and contraction balloon 4. A first one-way valve 7 is installed between the inlet and the lower conduit 102, and a second one-way valve 8 is installed between the outlet and the reservoir balloon 2. The whole structure forms a channel for one-way drainage of the accumulated fluid, ensuring that the accumulated fluid can only enter the expansion and contraction balloon 4 from the drainage conduit 1, and then enter the reservoir balloon 2 from the expansion and contraction balloon 4, avoiding backflow of the accumulated fluid and ensuring the safety and effectiveness of the drainage process. Meanwhile, the drainage conduit 1 is divided into two parts: an upper conduit 101 and a lower conduit 102, which are connected by a double-layer drip tube. The double-layer drip tube is composed of an outer sleeve 5 and an inner drip tube 6, with a cavity layer 3 in the middle. The outer sleeve 5 is made of rigid material, which can provide stable support for the entire structure. During the air injection process of the cavity layer 3, it will not deform due to the increase of air pressure in the cavity layer 3. The inner drip tube 6 is made of flexible material that can automatically reset. A third one-way valve 9 is installed between the inner drip tube 6 and the upper conduit 101 to prevent the accumulated liquid from flowing back to the upper conduit 101. When air is injected into the cavity layer 3, it can compress the inner dropper 6 to deform, and the liquid inside the inner dropper 6 is discharged into the lower conduit 102. When the gas in the cavity layer 3 is extracted, the external air pressure disappears, and the inner dropper 6 will return to its original shape due to its own elasticity, and its volume will increase. During this process, a negative pressure environment will be formed inside the inner dropper 6. The establishment of the negative pressure environment will draw the liquid accumulated in the upper conduit 101 into the inner dropper 6, thereby achieving the purpose of active suction. In addition, it should be specifically noted that, such as Figure 7 and Figure 8 As shown, the two ends of the outer sleeve 5 are connected to the upper conduit 101 and the lower conduit 102 respectively, and a sealing ring is provided at the connection. The sealing ring ensures that the cavity layer 3 is always in a sealed state, preventing gas leakage and ensuring that the pressure change of the cavity layer 3 can be effectively realized. In addition, in this embodiment, the reservoir balloon 2 and the expansion balloon 4 are both made of flexible material that can automatically reset. The reservoir balloon 2 establishes a preliminary negative pressure environment. Combined with the synergistic effect of the expansion balloon 4 and the double-layer drip tube, it ensures the continuous and stable flow of the accumulated fluid in the drainage catheter 1, reducing the risk of blockage and backflow. Specifically, during use, the upper catheter 101 of the drainage catheter 1 is first inserted into the designated location in the patient's abdominal cavity. The reservoir balloon 2 is placed in the appropriate position. The top of the reservoir balloon 2 is equipped with a sealing plug. The sealing plug is opened, the reservoir balloon 2 is squeezed to expel the internal air, and the sealing plug is put back in its original position. A pipe is provided between the reservoir balloon 2 and the second one-way valve 8. The top of the pipe is fixedly connected to the second one-way valve 8, and the bottom of the pipe is connected to the reservoir balloon 2 by a threaded connection, which facilitates the replacement of a new reservoir balloon 2 later. The reservoir balloon 2, which has expelled the air, forms a preliminary negative pressure environment and begins to drain the accumulated fluid. The accumulated fluid flows through the upper catheter 101, the inner drip tube 6, the lower catheter 102, and the expansion and contraction balloon 4 in sequence before finally flowing into the reservoir balloon 2 for temporary storage. Next, the drainage rate of the effusion can be adjusted appropriately according to the actual situation. Patients or medical staff can further enhance the drainage effect by periodically squeezing the expansion and contraction balloon 4. When the expansion and contraction balloon 4 is squeezed, the effusion inside flows into the reservoir balloon 2 through the drain port and the second one-way valve 8. At the same time, the air inside enters the cavity layer 3 of the double-layer drip tube through the air guide tube 10. After being injected into the cavity layer 3, the air pressure increases and squeezes the inner layer drip tube 6. At this time, the liquid inside the inner dropper 6 is squeezed into the lower conduit 102. Since the expansion balloon 4 is in a flattened state, there is no space to accommodate the accumulated liquid. The lower conduit 102 becomes a temporary liquid storage channel. The accumulated liquid continues to flow in and accumulate. As the amount of accumulated liquid increases, the pressure inside the lower conduit 102 gradually increases, which stores pressure potential energy for the rapid opening of the subsequent one-way valve. Then the expansion balloon 4 elastically resets, and a negative pressure is instantly formed inside, generating suction force on the accumulated liquid in the lower conduit 102. The pressure of the accumulated liquid stored in the lower conduit 102 is superimposed with the negative pressure of the expansion balloon 4. The pressure directly acts on the valve plate of the first one-way valve 7, causing it to be quickly opened. After the valve plate is opened, the accumulated liquid in the lower conduit 102 flows into the expansion balloon 4 quickly and in batches, greatly improving the single drainage efficiency and reducing the retention of accumulated liquid in the lower conduit 102. Similarly, when the balloon 4 is reset, a negative pressure is formed inside it, which draws the fluid in the lower catheter 102 into the balloon 4 through the inlet and the first one-way valve 7. At the same time, the gas in the cavity layer 3 is recovered to the inner wall of the balloon 4. The air in the cavity layer 3 of the double-layer drip tube is drawn out through the air guide tube 10. The inner drip tube 6 returns to its original shape due to its own elasticity, and its volume increases to form a negative pressure, which draws the fluid in the upper catheter 101 into the inner drip tube 6, thereby further realizing the active drainage of the fluid in the upper catheter 101.

[0025] In this embodiment, as Figure 2 and Figure 4 , Figure 5 and Figure 6 As shown, a hollow tube 401 is inserted into the inner wall of the expansion and contraction balloon 4, and a float 402 is slidably connected to the outside of the hollow tube 401. The float 402 can float up and down with the change of the liquid level inside the expansion and contraction balloon 4. A hose 403 is fixedly connected to the top of the float 402. A drainage channel 404 is provided on the inner wall of the float 402. The bottom of the hose 403 is connected to one end of the drainage channel 404, and the other end of the drainage channel 404 extends to the outer surface of the float 402. The hollow tube 401 has a strip-shaped opening on its side curved surface. A slider 405 is slidably connected to the inner wall of the hollow tube 401. A protrusion is provided on one side of the slider 405, and the protrusion passes through the strip-shaped opening and is fixedly connected to the inner wall of the float 402. It should be noted that: by installing a hollow tube 401 and a float 402 inside the inflation balloon 4, and opening a strip-shaped opening on one side of the hollow tube 401, the hollow tube 401 serves as both a drainage channel for the accumulated fluid and a limiter for the float 402, controlling the vertical up and down movement of the float 402. In this embodiment, the float 402 can float up and down according to the change of the liquid level in the expansion and contraction balloon 4. The hose 403 connected to its top is connected to the internal drainage channel 404. The top of the hose 403 is fixedly connected to the liquid inlet at the top of the expansion and contraction balloon 4. When the expansion and contraction balloon 4 expands, a negative pressure is formed inside. The liquid enters the hose 403 through the liquid inlet, then enters the drainage channel 404 through the hose 403, and finally drains into the expansion and contraction balloon 4 from the drainage channel 404. As the amount of liquid increases, the float 402 moves upward as the liquid level rises. During the upward floating process of the float 402, it is limited by the hollow tube 401 and always maintains vertical up and down movement. Next, when the external force on the expansion and contraction balloon 4 disappears, the expansion and contraction balloon 4 will automatically reset and return to its original state. Under pressure, the accumulated fluid inside will flow into the reservoir balloon 2 through the drain port and the second one-way valve 8. At the same time, the float 402 will move downward as the liquid level drops. In this process, it should be noted that a through groove is provided in the middle of the float 402, the through groove slides along the hollow tube 401, and a sliding piece 405 is provided on the inner wall of the hollow tube 401. A protrusion is provided on one side of the sliding piece 405, and the protrusion passes through the strip-shaped opening and is fixed to the through groove of the float 402. The sliding piece 405 can slide up and down synchronously with the float 402. During the drainage process, due to the presence of the strip opening on the hollow tube 401, even when the float 402 is descending, the normal flow of the accumulated liquid will not be hindered. The accumulated liquid permeates to the bottom of the hollow tube 401 through the strip opening and flows unidirectionally into the liquid storage bladder 2 through the second one-way valve 8 at the bottom. In addition, for example Figure 3As shown, when the fluid in the expansion and contraction balloon 4 is gradually drained and the liquid level drops, the float 402 slides down, simultaneously driving the sliding plate 405 to slide along the hollow tube 401 to the bottom. At this time, the sliding plate 405 and the float 402 together form a physical barrier, automatically blocking the passage for air to enter the reservoir balloon 2, preventing air from contacting the fluid in the reservoir balloon 2. During the process of actively draining the fluid using the expansion and contraction balloon 4, the existing negative pressure suction of the reservoir balloon 2 can also be maintained. Furthermore, an air inlet valve is installed on one side of the outer wall of the balloon 4 to replenish or release air, thereby maintaining the air pressure balance inside and outside the balloon 4 and ensuring that the balloon 4 can perform normal expansion and contraction movements. When it is necessary to adjust the air pressure of the balloon 4, it can be achieved by operating the air inlet valve. In actual use, medical staff can adjust the squeezing frequency and internal air pressure of the balloon 4 in real time according to the patient's fluid accumulation and physical condition to achieve the best drainage effect.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drainage device for endocrinology, comprising a drainage catheter (1) and a reservoir balloon (2), characterized in that: The drainage catheter (1) is provided with a double-layered dropper in the middle, and the double-layered dropper is provided with a cavity layer (3). The bottom of the drainage catheter (1) is equipped with a dilator (4) for connecting the reservoir balloon (2). Through the periodic expansion and contraction of the dilator (4), negative pressure suction can be generated so that the fluid in the lower half of the drainage catheter (1) can be quickly transported into the dilator (4), and at the same time, the cavity layer (3) of the double-layered dropper is intermittently filled with air and evacuated to achieve active drainage of the fluid in the upper half of the drainage catheter (1).

2. The drainage device for endocrinology according to claim 1, characterized in that: The drainage catheter (1) is divided into an upper catheter (101) and a lower catheter (102), and the double-layer dropper is located between the upper catheter (101) and the lower catheter (102); The expansion balloon (4) is provided with an inlet and an outlet at its two ends respectively. A first one-way valve (7) is installed between the inlet and the lower conduit (102), and a second one-way valve (8) is installed between the outlet and the reservoir balloon (2).

3. The drainage device for endocrinology according to claim 2, characterized in that: The double-layer dropper is divided into an outer sleeve (5) and an inner dropper (6). One end of the inner dropper (6) is connected to the upper conduit (101), and the other end of the inner dropper (6) is connected to the lower conduit (102). The cavity layer (3) is located between the outer sleeve (5) and the inner dropper (6).

4. The drainage device for endocrinology according to claim 3, characterized in that: The outer sleeve (5) is made of rigid material, the inner dropper (6) is made of flexible material, and a third one-way valve (9) is installed between the inner dropper (6) and the upper conduit (101).

5. The drainage device for endocrinology according to claim 4, characterized in that: An air guide tube (10) is connected between the top of the expansion balloon (4) and the cavity layer (3) of the double-layer dropper. By squeezing the expansion balloon (4), the accumulated liquid in the expansion balloon (4) can be transported unidirectionally into the storage balloon (2), and at the same time, air is transported through the air guide tube (10) at the top into the cavity layer (3) to squeeze the inner dropper (6).

6. The drainage device for endocrinology according to claim 1, characterized in that: The inner wall of the expansion balloon (4) is fitted with a hollow tube (401), and a float (402) is slidably connected to the outside of the hollow tube (401). The float (402) can float up and down as the liquid level inside the expansion balloon (4) changes.

7. The drainage device for endocrinology according to claim 6, characterized in that: The top of the float (402) is fixedly connected to a hose (403), and the inner wall of the float (402) is provided with a drainage channel (404). The bottom of the hose (403) is connected to one end of the drainage channel (404), and the other end of the drainage channel (404) extends to the outer surface of the float (402).

8. The drainage device for endocrinology according to claim 6, characterized in that: The hollow tube (401) has a strip-shaped opening on its side curved surface. A sliding piece (405) is slidably connected to the inner wall of the hollow tube (401). A protrusion is provided on one side of the sliding piece (405), and the protrusion passes through the strip-shaped opening and is fixedly connected to the inner wall of the float (402).

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