Abdominal cavity drainage tube anti-leakage device based on dynamic air pressure adjustment
The peritoneal drainage tube anti-leakage device with dynamic air pressure regulation and intelligent monitoring solves the problems of insufficient sealing and poor economy, realizes adaptive adjustment of the sealing ring and directional collection of exudate, reduces the risk of leakage and infection, and improves patient comfort and economy.
Patent Information
- Application Number
- CN202511154777.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2025-10-03
AI Technical Summary
The existing anti-leakage method of abdominal drainage tube is not sufficiently sealed and cannot adapt to abdominal pressure fluctuations, resulting in displacement of the drainage tube, easy damage to the skin, retention of exudate, increasing the risk of bacterial infection, and poor economic efficiency.
The device adopts dynamic air pressure regulation to prevent leakage of peritoneal drainage tube, including dynamic sealing ring, pressure sensor and control system. It automatically adjusts the sealing pressure by real-time monitoring of abdominal pressure changes, and combines with exudate collection channel and pH sensor to realize directional collection and intelligent monitoring of exudate.
Adaptive adjustment of the sealing ring is achieved to prevent leakage and skin damage, reduce the risk of exudate retention and bacterial infection, and lower medical costs.
Smart Images
Figure CN120733145A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and in particular to an anti-leakage device for an abdominal drainage tube based on dynamic air pressure regulation. Background Art
[0002] Ascites is one of the most common complications of cirrhosis and a key marker for the progression of cirrhosis from the compensated stage to the decompensated stage. In addition to medication and symptomatic treatment, the placement of ascites tubes to continuously drain small amounts of ascites has seen increasing clinical application and research in recent years, with long-term placement of ascites tubes considered cost-effective. However, clinically, the use of ascites tubes requires prevention of extravasation of ascites. Several methods exist to prevent extravasation. Passive leak prevention primarily relies on physical barriers, such as securing with sterile gauze and tape or covering with transparent dressings. Active leak prevention devices primarily intervene in one path of extravasation, such as leak prevention patches that wrap the skin interface of the extravasation tube with a silicone ring and adhesive layer; negative pressure wound therapy; and fibrin glue closure. Auxiliary leak prevention primarily aims to indirectly reduce extravasation, such as with bandaging, albumin infusion, and the use of ostomy bags.
[0003] However, the current anti-leakage method has the following problems: Insufficient sealing, static sealing cannot adapt to fluctuations in abdominal pressure, such as changes in ascites volume due to coughing posture, etc., which may cause displacement of the drainage tube.
[0004] The skin of patients with cirrhosis is fragile, and highly sticky adhesive tape and repeated tearing can easily damage the epidermis.
[0005] Exudate retention, such as gauze saturation, becomes a culture medium for bacteria, increasing the incidence of spontaneous bacterial peritonitis.
[0006] The cost-effectiveness is poor, and repeated dressing changes, dressing change fees and related consumables costs are a heavy burden for long-term use. Summary of the Invention
[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an anti-leakage device for abdominal drainage tube based on dynamic air pressure regulation.
[0008] To achieve the above object, the present invention adopts the following technical solutions: An anti-leakage device for abdominal drainage tube based on dynamic air pressure regulation, comprising a chassis, a dynamic sealing ring, an air filling and discharging pump, a liquid storage bag, a drainage bag and a control system; A drainage hole is provided in the middle of the chassis, a drainage tube is provided in the drainage hole, one end of the drainage tube is inserted into the human body, and the other end of the drainage tube is connected to the drainage bag; a seepage collection channel is also provided in the chassis, the channel direction of the seepage collection channel is perpendicular to the channel direction of the drainage hole, one end of the seepage collection channel is connected to the drainage hole, and the other end of the seepage collection channel extends outside the chassis and is connected to the liquid storage bag, an interface is provided at the bottom of the liquid storage bag, a one-way valve is provided in the interface, and the interface is connected to the drainage bag through a connecting tube; The dynamic sealing ring is fixed above the chassis, and is sleeved outside the drainage tube. The dynamic sealing ring is an air bag, and is connected to the inflation and deflation air pump through an air tube. A pressure sensor is provided in the inner cavity of the dynamic sealing ring; and the pressure sensor is electrically connected to the control system. A pH sensor is also provided at the outlet of the exudate collection channel, and the pH sensor is electrically connected to the control system. An alarm module is also provided, and the alarm module is electrically connected to the control system. The charging and discharging air pump is electrically connected to the control system.
[0009] Furthermore, the chassis includes a silicone adhesive layer, a hydrocolloid dressing layer and a transparent polyurethane film layer. The hydrocolloid dressing layer is arranged between the silicone adhesive layer and the transparent polyurethane film layer, and the silicone adhesive layer is arranged toward the human body. The hydrocolloid dressing layer and the silicone adhesive layer are bonded to each other by a pressure-sensitive adhesive, and the transparent polyurethane film layer is bonded and fixed to the upper surface of the hydrocolloid dressing layer.
[0010] Furthermore, the transparent polyurethane film layer and the dynamic sealing ring are fixedly connected by gluing to form a waterproof sealing interface; a first covering layer is also provided above the dynamic sealing ring, and the first covering layer is fixedly connected to the transparent polyurethane film layer.
[0011] Furthermore, the interface is a short cylinder, the upper end of the interface is connected to the inner cavity of the liquid storage bag, the one-way valve includes a valve plug, a spring and a spring mounting seat, the inner cavity of the interface is provided with an annular groove, the top of the valve plug is a conical portion, the middle of the valve plug is provided with a circular groove, the side of the valve plug is provided with a through hole, the through hole is connected to the circular groove, the spring mounting seat is fixed in the interface, one end of the spring is arranged in the circular groove, and the other end of the spring is connected to the spring mounting seat. When the spring is in a normal state, the conical portion is located above the annular groove.
[0012] Furthermore, the spring mounting seat includes a support rod and a ring seat, one end of the support rod is connected to the inner wall of the interface, and the other end of the support rod is connected to the outer wall of the lower end of the ring seat, the ring seat is concentrically arranged with the interface, and the support rod is arranged along the radial direction of the interface; the lower end of the spring is sleeved on the outside of the ring seat.
[0013] Furthermore, the hole wall of the drainage hole of the hydrocolloid dressing layer is provided with an annular guide groove, the liquid inlet of the exudate collection channel is connected to the annular guide groove, and the inner cavity of the exudate collection channel is a spiral channel.
[0014] Furthermore, the inner wall of the exudate collection channel is coated with heparin sodium.
[0015] Furthermore, a liquid inlet interface is provided on the upper part of the liquid storage bag, and the liquid inlet interface is a Y-shaped tube. The lower end of the liquid inlet interface is connected to the inner cavity of the liquid storage bag. The liquid inlet interface includes a first interface and a second interface. The first interface is connected to the outlet end of the exudate collection channel, and the inner wall of the second interface is provided with an internal thread. The pH sensor includes a shell, a probe pH electrode and a Bluetooth module. The probe pH electrode is arranged at the front end of the shell, and the Bluetooth module is arranged at the end of the shell. The probe pH electrode is electrically connected to the Bluetooth module, and the Bluetooth module is connected to the control system via Bluetooth. An external thread is provided on the side wall near the front end of the shell, and the shell is connected to the second interface through a thread. The probe pH electrode enters the liquid inlet interface from the second interface and is located below the outlet end of the exudate collection channel.
[0016] Furthermore, the liquid storage bag is provided with a visual window, and the visual window is made of a transparent material.
[0017] Furthermore, the peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation includes a working process, which includes: S1: installation phase; S11: Clean and dry the skin, and trim the hair around the drainage tube if necessary. S12: Chassis fitting: Align the drainage hole of the chassis with the puncture point of the drainage tube, press the silicone adhesive layer to ensure seamless adhesion with the skin; S13: Start the air pump to inflate the dynamic sealing ring; preset the optimal pressure, monitor the pressure inside the dynamic sealing ring through the pressure sensor, and until the optimal pressure is reached, the control system controls the air pump to stop inflating; S14: The drainage tube is connected to the drainage bag, the exudate collection channel is connected to the liquid inlet interface of the liquid storage bag, and the interface below the liquid storage bag is connected to the drainage bag through a connecting tube; S2: daily operation stage; S21: Exudate management; The exudate flows through the guide groove below the sealing ring into the exudate collection channel and then into the liquid storage bag. When the liquid storage bag is full of 20 ml, the spring of the one-way valve is compressed, and the liquid flows into the drainage bag through the one-way valve. Medical staff observe the color and turbidity of the exudate through the liquid storage bag. S22: dynamic adjustment; The pressure sensor detects every five minutes and transmits the test results to the control system. The control system includes an analysis module, which is used to analyze the sealing pressure fluctuation between the test results and the optimal pressure. When the patient moves or the abdominal pressure changes, the sealing pressure fluctuation exceeds ±2mmHg, triggering dynamic sealing. The control system controls the inflation and deflation pump to fine-tune the inflation and deflation to maintain a stable seal. S23: monitoring and alarming; The pH sensor uploads pH data to the control system. The analysis module of the control system determines whether there is an abnormality. When the uploaded pH data is continuously greater than 7.4, an alarm is triggered, and the control system controls the alarm module to issue an alarm. S3: Maintenance and replacement stage; S31: Chassis replacement. If there is no alarm, the chassis will be replaced every 3 to 7 days. If an alarm occurs, the chassis will be replaced when the alarm occurs. S32: Replace the liquid storage bag. Remove and replace the liquid storage bag every seven days.
[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention designs a dynamic sealing ring, which is a silicone airbag surrounding the drainage tube. It is inflated by a micro air pump to form an annular pressure sealing ring. The sealing pressure is monitored in real time by a pressure sensor. According to changes in abdominal pressure, such as changes in coughing posture, the inflation volume is automatically adjusted to ensure that the dynamic sealing ring is adaptively adjusted to prevent the seal from being too tight, causing skin damage, or too loose, causing leakage. (2) After the exudate enters the device through the gap between the drainage tube and the skin, it is guided to the side liquid storage bag through the hydrophobic coating channel. The one-way valve at the bottom of the storage bag ensures that the liquid can only be discharged to the external drainage bag, preventing ascites from flowing back and contaminating the sealing area, ensuring dry skin, ensuring that the bottom plate is firmly fixed, reducing the replacement frequency, and reducing medical costs. The inner wall of the channel is smooth and contains an anticoagulant coating, which reduces blockage caused by fibrin deposition. (3) By monitoring the pH value of the exudate, timely alarms are issued to ensure that medical staff can replace the bottom plate in time to prevent bacterial infection.
[0019] The present invention solves the problem of drainage tube extravasation in patients with cirrhosis and ascites through a three-in-one design of dynamic sealing, directional collection of exudate, and intelligent monitoring. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of the structure of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention; Figure 2This is a schematic structural diagram of the chassis and dynamic sealing ring of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention; Figure 3 This is an enlarged view of a portion a of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention; Figure 4 A bottom view of the spring mounting seat of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention; Figure 5 This is a schematic structural diagram of a pH sensor in a peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to the present invention; Figure 6 This is a schematic diagram of the structure of the exudate collection channel of the peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention; Figure 7 This is a schematic diagram of the connection structure of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation of the present invention. DETAILED DESCRIPTION
[0021] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.
[0022] like Figure 1 、 Figure 2 A peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation includes a chassis 100, a dynamic sealing ring 200, an inflation and deflation air pump 300, a liquid storage bag 400, a drainage bag 500 and a control system 600.
[0023] A drainage hole 110 is provided in the middle of the chassis 100. A drainage tube 120 is provided in the drainage hole 110. One end of the drainage tube 120 is inserted into the human body, and the other end of the drainage tube 120 is connected to the drainage bag 500, ensuring that ascites is drained by puncture and that the patient is receiving normal treatment. A liquid exudate collection channel 130 is also provided in the chassis 100. The direction of the channel of the liquid exudate collection channel 130 is perpendicular to the direction of the channel of the drainage hole 120. One end of the liquid exudate collection channel 130 is connected to the drainage hole 120, and the other end of the liquid exudate collection channel 130 extends outside the chassis 100 and is connected to the liquid storage bag 400. This ensures that the liquid exudate at the puncture site is drained into the liquid storage bag 400 through the liquid exudate collection channel 130, preventing the liquid exudate from contacting the skin for a long time and reducing leakage-related skin complications, such as maceration infection. The bottom of the liquid storage bag 400 is provided with a port 410, which houses a one-way valve 420. The port 410 is connected to the drainage bag 500 via a connecting tube 430. This ensures a closed system between the liquid storage bag 400 and the drainage bag 500, facilitating the drainage of exudate into the drainage bag 500. The one-way valve 420 also prevents backflow of the fluid. The liquid storage bag has a relatively small capacity of 20 ml to avoid excessive weight and wound damage.
[0024] The dynamic sealing ring 200 is fixed on the top of the chassis 100. The dynamic sealing ring 200 is sleeved on the outside of the drainage tube 120. The dynamic sealing ring 200 is an airbag, which can be made of silicone material with high antibacterial properties. The dynamic sealing ring 200 is connected to the inflation and deflation pump 300 through the trachea 210. The inner cavity of the dynamic sealing ring 200 is provided with a pressure sensor 220; the pressure sensor 220 is electrically connected to the control system 600; the inflation and deflation pump 300 is electrically connected to the control system 600. The pressure sensor 220 monitors the air pressure in the dynamic sealing ring 200, controls the inflation and deflation pump 300 to adaptively adjust the dynamic sealing ring, and the pressure sensor 220 monitors the sealing pressure in real time. According to changes in abdominal pressure, such as changes in coughing posture, the inflation volume is automatically adjusted to prevent the seal from being too tight, causing skin damage, or too loose, causing leakage.
[0025] A pH sensor 700 is also provided at the outlet of the exudate collection channel 130, and the pH sensor 700 is electrically connected to the control system 600. An alarm module is also provided, and the alarm module is electrically connected to the control system 600. The normal pH of ascites is 7.3 to 7.4. If it rises to greater than 7.45, it indicates bacterial infection and triggers an alarm, ensuring that the patient's condition is understood in time and the chassis is replaced in time to prevent the bacterial infection from worsening and causing skin inflammation.
[0026] Furthermore, the base plate 100 includes a silicone adhesive layer 101, a hydrocolloid dressing layer 102, and a transparent polyurethane film layer 103. The hydrocolloid dressing layer 102 is disposed between the silicone adhesive layer 101 and the transparent polyurethane film layer 103, with the silicone adhesive layer 101 facing the body. The hydrocolloid dressing layer 102 and the silicone adhesive layer 101 are bonded together with a pressure-sensitive adhesive, and the transparent polyurethane film layer 103 is bonded to the upper surface of the hydrocolloid dressing layer 102. The multi-layer composite adhesive base plate, through the middle hydrocolloid dressing layer 102, ensures that it absorbs trace exudates while maintaining adhesion to the skin, keeping the adhesive area dry, preventing maceration and infection, and ensuring a more secure adhesion, reducing the frequency of replacement and the possibility of bacterial infection.
[0027] Furthermore, the transparent polyurethane film layer 103 and the dynamic sealing ring 200 are fixedly connected by gluing to form a waterproof sealing interface; a first covering layer 201 is also provided above the dynamic sealing ring 200, and the first covering layer 201 is fixedly connected to the transparent polyurethane film layer 103 to prevent the exudate from seeping out of the dynamic sealing ring 200, thereby ensuring the sealing performance and preventing the exudate from contaminating clothes. At the same time, the first covering layer 201 can be fixed by a detachable gluing method such as pressure-sensitive adhesive, which facilitates the replacement of the chassis, avoids the waste of dynamic sealing ring resources, and reduces costs.
[0028] Further, such as Figure 3 The interface 410 is a short cylinder, the upper end of the interface 410 is connected to the inner cavity of the liquid storage bag 400, the one-way valve 420 includes a valve plug 421, a spring 422 and a spring mounting seat 423. The inner cavity of the interface 410 is provided with an annular groove 411, and the valve plug 421 is slidably matched with the inner wall of the interface 410. The top of the valve plug 421 is a conical portion, the middle of the valve plug 421 is provided with a circular groove 424, and the side of the valve plug 421 is provided with a through hole 425, which is connected to the circular groove 424. The through hole 425 is set within the range of the annular groove 411, and the spring mounting seat 423 is fixed in the interface 410. One end of the spring 422 is set in the circular groove 424, and the other end of the spring 422 is connected to the spring mounting seat 423. In the normal state of the spring 422, the conical portion is located above the annular groove 410. The measuring range of spring 422 is 0.2-0.5N. When in use, when the exudate flows into the liquid storage bag 400 and is stored in the liquid storage bag, when the storage reaches 20mL, the spring 422 is compressed, so that the valve plug 421 is pressed down, and the conical part moves to the annular groove 410. The exudate enters the annular groove 410 from the inner cavity of the liquid storage bag 400 and enters the circular groove 424 from the through hole 425, and is then discharged from the interface 410. The one-way valve 420 at the bottom of the liquid storage bag 400 ensures that the liquid can only be discharged to the external drainage bag to prevent ascites from flowing back and contaminating the sealing area.
[0029] Further, such as Figure 4 The spring mounting seat 423 includes a support rod 426 and a ring seat 427. One end of the support rod 426 is connected to the inner wall of the interface 410, and the other end of the support rod 426 is connected to the outer wall of the lower end of the ring seat 427. The ring seat 427 is concentric with the interface 410, and the support rod 426 is arranged along the radial direction of the interface. The lower end of the spring is sleeved on the outer side of the ring seat 427. This ensures that the spring mounting seat is firmly fixed and does not hinder the normal flow of the seepage, ensuring the normal use of the one-way valve.
[0030] Further, such as Figure 2 The drainage hole of the hydrocolloid dressing layer 102 is provided with an annular guide groove 111 on its wall. The liquid inlet of the exudate collection channel 130 is connected to the annular guide groove 111, which facilitates the drainage of the exudate into the exudate collection channel 130 and also facilitates the absorption of the exudate by the hydrocolloid dressing layer 102. Ascites seeps out from the gap between the drainage tube and the skin → is blocked by the dynamic sealing ring → flows along the annular guide groove into the entrance of the collection channel. Figure 6 The inner cavity of the exudate collection channel 130 is a spiral channel 131. This prevents exudate from flowing back into the contact area between the chassis and the skin, causing contamination. The inner wall of the exudate collection channel 130 is sprayed with polytetrafluoroethylene, which uses its hydrophobicity to prevent liquid from flowing back into the sealed area.
[0031] Furthermore, the inner wall of the exudate collection channel 130 is coated with sodium heparin to avoid fibrinogen deposition during drainage, which may cause tube blockage, and ensure smooth drainage and normal exudate drainage.
[0032] Furthermore, the upper portion of the liquid storage bag 400 is provided with a liquid inlet port 440. This port is a Y-shaped tube, the lower end of which is connected to the inner cavity of the liquid storage bag. The liquid inlet port 440 includes a first port 441 and a second port 442. The first port 441 is connected to the outlet of the exudate collection channel 130 and can be detachably connected via threads. The sealed design separates the chassis from the liquid storage bag, reducing the cost of a single replacement and improving the economics of long-term use.
[0033] The inner wall of the second interface 442 is provided with an internal thread, Figure 5 The pH sensor 700 includes a housing 710, a probe pH electrode 720, and a Bluetooth module 730. The probe pH electrode 720 is arranged at the front end of the housing 710, and the Bluetooth module 730 is arranged at the end of the housing 710. The probe pH electrode 720 is electrically connected to the Bluetooth module 730. The Bluetooth module 730 is connected to the control system via Bluetooth. An external thread 711 is provided on the side wall near the front end of the housing 710. The housing 710 is connected to the second interface via a thread. The probe pH electrode enters the liquid inlet interface from the second interface and is located below the outlet end of the exudate collection channel. The pH sensor is ensured to be able to detect the pH value of the exudate and transmit data through the Bluetooth module. The Bluetooth module can also send data to the medical end APP to support remote monitoring and early intervention, shorten diagnosis, and delay the reduction of the infection rate of spontaneous peritonitis. The pH sensor 700 is ensured to be detachable, which is convenient for replacing and disassembling the liquid storage bag, avoiding the pH sensor 700 being unable to be disassembled, resulting in high medical costs.
[0034] Furthermore, the liquid storage bag 400 is provided with a visual window 450 made of a transparent material, so that medical staff can observe the state of the exudate through the visual window.
[0035] The working process of the abdominal drainage tube anti-leakage device based on dynamic air pressure regulation includes: S1: installation phase; S11: Clean and dry the skin. Trim the hair around the drainage tube if necessary to prevent loose adhesion.
[0036] S12: Chassis fitting: Align the drainage hole of the chassis with the puncture point of the drainage tube, press the silicone adhesive layer to ensure seamless adhesion with the skin; the trimmable edge can be used to adapt to different body shapes of round or oval chassis.
[0037] S13: Start the air pump to inflate the dynamic sealing ring; preset the optimal pressure, monitor the pressure inside the dynamic sealing ring through the pressure sensor until the optimal pressure is reached, and the control system controls the air pump to stop inflation; ensure that after installation, the pressure inside the dynamic sealing ring is at the optimal pressure to ensure the sealing effect.
[0038] S14: The drainage tube is connected to the drainage bag, the exudate collection channel is connected to the liquid inlet interface of the liquid storage bag, and the interface below the liquid storage bag is connected to the drainage bag through a connecting tube; ensure that the exudate discharged from the infusion channel eventually enters the drainage bag, completing the closure of the entire system.
[0039] S2: daily operation stage; S21: Exudate management; The exudate enters the exudate collection channel through the guide groove below the sealing ring and flows into the liquid storage bag. When the liquid storage bag is full of 20 ml, the spring of the one-way valve is compressed, and the liquid enters the drainage bag through the one-way valve; medical staff observe the color and turbidity of the exudate through the liquid storage bag.
[0040] S22: dynamic adjustment; The pressure sensor detects once every five minutes and transmits the detection results to the control system, such as Figure 7 The control system includes an analysis module, which is used to analyze the sealing pressure fluctuation between the test results and the optimal pressure. When the patient moves or the abdominal pressure changes, the sealing pressure fluctuation exceeds ±2mmHg, triggering dynamic sealing. The control system controls the inflation and deflation pump to perform fine-tuning of inflation and deflation to maintain a stable seal; ensuring that the sealing effect can be guaranteed when the patient's activity position changes or the abdominal pressure changes, adapting to the changes in negative pressure in real time, maintaining a constant seal, and improving the patient's comfort.
[0041] S23: monitoring and alarming; The pH sensor uploads pH data to the control system, which is set to upload pH data every hour. The control system's analysis module determines whether there are any abnormalities. If the uploaded pH data is continuously greater than 7.4, an alarm is triggered, and the control system controls the alarm module to issue an alarm, ensuring that medical staff can replace the chassis in a timely manner to prevent bacterial infection.
[0042] S3: Maintenance and replacement stage; S31: Chassis replacement. If there is no alarm, the chassis will be replaced every 3 to 7 days. If an alarm occurs, the chassis will be replaced when the alarm occurs. S32: Replace the fluid bag. Remove and replace the fluid bag every seven days. Rinse with saline or replace with a disposable fluid bag. Ensure the cleanliness of the fluid bag in accordance with medical standards.
[0043] The charging and discharging pump can be powered by a button battery and uses a micro pump to ensure a small size. At the same time, the button battery can be replaced to avoid malfunction.
[0044] The present invention has been described with reference to the above embodiments. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements that do not depart from the spirit and scope of the present invention are intended to be protected by the present invention.
Claims
1. A device for preventing leakage of abdominal drainage tubes based on dynamic air pressure regulation, characterized in that: It includes chassis, dynamic sealing ring, air filling and discharging pump, liquid storage bag, drainage bag and control system; A drainage hole is provided in the middle of the chassis, a drainage tube is provided in the drainage hole, one end of the drainage tube is inserted into the human body, and the other end of the drainage tube is connected to the drainage bag; a seepage collection channel is also provided in the chassis, the channel direction of the seepage collection channel is perpendicular to the channel direction of the drainage hole, one end of the seepage collection channel is connected to the drainage hole, and the other end of the seepage collection channel extends outside the chassis and is connected to the liquid storage bag, an interface is provided at the bottom of the liquid storage bag, a one-way valve is provided in the interface, and the interface is connected to the drainage bag through a connecting tube; The dynamic sealing ring is fixed above the chassis, and is sleeved outside the drainage tube. The dynamic sealing ring is an air bag, and is connected to the inflation and deflation air pump through an air tube. A pressure sensor is provided in the inner cavity of the dynamic sealing ring; and the pressure sensor is electrically connected to the control system. A pH sensor is also provided at the outlet of the exudate collection channel, and the pH sensor is electrically connected to the control system. An alarm module is also provided, and the alarm module is electrically connected to the control system. The charging and discharging air pump is electrically connected to the control system.
2. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The chassis includes a silicone adhesive layer, a hydrocolloid dressing layer and a transparent polyurethane film layer. The hydrocolloid dressing layer is arranged between the silicone adhesive layer and the transparent polyurethane film layer, and the silicone adhesive layer is arranged toward the human body. The hydrocolloid dressing layer and the silicone adhesive layer are bonded to each other by a pressure-sensitive adhesive, and the transparent polyurethane film layer is bonded and fixed to the upper surface of the hydrocolloid dressing layer.
3. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 2, characterized in that: The transparent polyurethane film layer and the dynamic sealing ring are fixedly connected by gluing to form a waterproof sealing interface; a first covering layer is further provided above the dynamic sealing ring, and the first covering layer is fixedly connected to the transparent polyurethane film layer.
4. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The interface is a short cylinder, the upper end of the interface is connected to the inner cavity of the liquid storage bag, the one-way valve includes a valve plug, a spring and a spring mounting seat, the inner cavity of the interface is provided with an annular groove, the top of the valve plug is a conical portion, the middle of the valve plug is provided with a circular groove, the side of the valve plug is provided with a through hole, the through hole is connected to the circular groove, the spring mounting seat is fixed in the interface, one end of the spring is arranged in the circular groove, and the other end of the spring is connected to the spring mounting seat. When the spring is in a normal state, the conical portion is located above the annular groove.
5. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 4, characterized in that: The spring mounting seat includes a support rod and a ring seat, one end of the support rod is connected to the inner wall of the interface, and the other end of the support rod is connected to the outer side wall of the lower end of the ring seat, the ring seat is concentrically arranged with the interface, and the support rod is arranged along the radial direction of the interface; the lower end of the spring is sleeved on the outside of the ring seat.
6. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 2, characterized in that: The hole wall of the drainage hole of the hydrocolloid dressing layer is provided with an annular guide groove, the liquid inlet of the exudate collection channel is connected to the annular guide groove, and the inner cavity of the exudate collection channel is a spiral channel.
7. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The inner wall of the permeate collecting channel is coated with heparin sodium.
8. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The upper part of the liquid storage bag is provided with a liquid inlet interface, which is a Y-shaped tube. The lower end of the liquid inlet interface is connected to the inner cavity of the liquid storage bag. The liquid inlet interface includes a first interface and a second interface. The first interface is connected to the outlet end of the exudate collection channel. The inner wall of the second interface is provided with an internal thread. The pH sensor includes a shell, a probe pH electrode and a Bluetooth module. The probe pH electrode is arranged at the front end of the shell, and the Bluetooth module is arranged at the end of the shell. The probe pH electrode is electrically connected to the Bluetooth module, and the Bluetooth module is connected to the control system via Bluetooth. The side wall near the front end of the shell is provided with an external thread. The shell is connected to the second interface through a thread. The probe pH electrode enters the liquid inlet interface from the second interface and is located below the outlet end of the exudate collection channel.
9. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The liquid storage bag is provided with a visual window, and the visual window is made of a transparent material.
10. The peritoneal drainage tube anti-leakage device based on dynamic air pressure regulation according to claim 1, characterized in that: The working process includes: S1: installation phase; S11: Clean and dry the skin, and trim the hair around the drainage tube if necessary. S12: Chassis fitting: Align the drainage hole of the chassis with the puncture point of the drainage tube, press the silicone adhesive layer to ensure seamless adhesion with the skin; S13: Start the air pump to inflate the dynamic sealing ring; preset the optimal pressure, monitor the pressure inside the dynamic sealing ring through the pressure sensor, and until the optimal pressure is reached, the control system controls the air pump to stop inflating; S14: The drainage tube is connected to the drainage bag, the exudate collection channel is connected to the liquid inlet interface of the liquid storage bag, and the interface below the liquid storage bag is connected to the drainage bag through a connecting tube; S2: daily operation stage; S21: Exudate management; The exudate flows through the guide groove below the sealing ring into the exudate collection channel and then into the liquid storage bag. When the liquid storage bag is full of 20 ml, the spring of the one-way valve is compressed, and the liquid flows into the drainage bag through the one-way valve. Medical staff observe the color and turbidity of the exudate through the liquid storage bag. S22: dynamic adjustment; The pressure sensor detects every five minutes and transmits the test results to the control system. The control system includes an analysis module, which is used to analyze the sealing pressure fluctuation between the test results and the optimal pressure. When the patient moves or the abdominal pressure changes, the sealing pressure fluctuation exceeds ±2mmHg, triggering dynamic sealing. The control system controls the inflation and deflation pump to fine-tune the inflation and deflation to maintain a stable seal. S23: monitoring and alarming; The pH sensor uploads pH data to the control system. The analysis module of the control system determines whether there is an abnormality. When the uploaded pH data is continuously greater than 7.4, an alarm is triggered, and the control system controls the alarm module to issue an alarm. S3: Maintenance and replacement stage; S31: Chassis replacement. If there is no alarm, the chassis will be replaced every 3 to 7 days. If an alarm occurs, the chassis will be replaced when the alarm occurs. S32: Replace the liquid storage bag. Remove and replace the liquid storage bag every seven days.