Portable pneumothorax drainage device

Abstract

The utility model discloses a portable pneumothorax drainage apparatus, which belongs to the field of medical instruments and comprises a gas-liquid isolation cavity, the inside of the cavity is isolated into a liquid gathering cavity and an exhaust cavity by a water-blocking breathable film, a one-way exhaust port pointing to the outside is arranged on the side wall of the exhaust cavity in a penetrating manner, and a micro air pump is arranged for sealing the one-way exhaust port. The micro air pump pumps and exhausts air from the exhaust cavity to the outside in a one-way manner; the device is used for patients with spontaneous pneumothorax, can continuously pump and exhaust gas in the thoracic cavity under negative pressure, promotes lung recruitment and early healing of alveolar crevasses, and is small in size and convenient to carry to go out of bed and walk early.

Description

Technical Field

[0001] The utility model mainly relates to the field of drainage, in particular to a portable pneumothorax drainage device. Background Art

[0002] Pneumothorax refers to the state of gas accumulation caused by the entry of gas into the pleural cavity. It is usually caused by lung disease or external force, which causes the rupture of lung tissue and visceral pleura, or the rupture of tiny emphysematous bubbles near the surface of the lung, and the air in the lung and bronchi escapes into the pleural cavity. Pneumothorax caused by chest wall or lung trauma is called traumatic pneumothorax; pneumothorax caused by spontaneous rupture of lung tissue due to disease is called "spontaneous pneumothorax". Spontaneous pneumothorax is more common in young and middle-aged men or those with chronic bronchitis, emphysema, and tuberculosis. This disease is one of the pulmonary emergencies. In severe cases, it can be life-threatening and can be cured with timely treatment.

[0003] Most pneumothorax require closed chest drainage treatment, especially for patients with pneumothorax compressed by more than 20%. After puncture and catheter drainage, the best treatment option is to connect negative pressure drainage to promote lung re-expansion as soon as possible; but the existing chest negative pressure drainage equipment is large in size and heavy in weight, and patients can only lie in bed during treatment, which is not conducive to early recovery. For the vast majority of pneumothorax patients, the amount of bleeding is small, the amount of gas discharged is large, and the drainage time is long. The general treatment cycle is 5-7 days, and it may even take months for difficult-to-cure patients. The existing chest negative pressure drainage equipment is obviously not suitable.

[0004] For the vast majority of pneumothorax patients, in order to enhance the treatment effect and reduce treatment costs, there is a clinical need for a portable drainage device that can provide continuous negative pressure drainage to promote lung re-expansion and wound healing, so that patients can walk independently. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the utility model provides a portable pneumothorax drainage device, including a gas-liquid isolation chamber, which is separated into a liquid collecting chamber and an exhaust chamber by a water-blocking breathable membrane, and a connection port for sealing and connecting a chest drainage tube is arranged on the upper part of the liquid collecting chamber. An exhaust port is arranged through the side wall of the exhaust chamber, and a micro-vacuum pump and a one-way membrane pointing from the exhaust chamber to the outside are arranged to seal the exhaust port, and the micro-vacuum pump unidirectionally exhausts gas from the exhaust chamber to the outside. The micro-vacuum pump is electrically connected to a power supply and a power exhaust alarm through a power line.

[0006] The micro air pumps include RF370, ZR370-03PM and CJWP08.

[0007] A one-way sealing membrane tube is arranged in the connection port, which is a soft tubular membrane, and one end of the one-way sealing membrane tube near the chest drainage tube is fully expanded and sealed and connected with the tube cavity of the connection port. The one side of the one-way sealing membrane tube near the liquid collection cavity is free to form a one-way sealing end.

[0008] A liquid discharge port is arranged at the lower part of the liquid collecting chamber, and a liquid discharge switch is arranged to control the opening and closing of the liquid discharge port, or a liquid collecting soft film tube bag is arranged in communication with the liquid discharge port.

[0009] A second exhaust port is passed through the side wall of the exhaust cavity, and a one-way membrane pointing to the outside is arranged to seal the second exhaust port.

[0010] A one-way exhaust port pointing to the outside is arranged through the side wall of the liquid collecting cavity, a water-blocking and breathable membrane is sealed inside the one-way exhaust port, and a one-way membrane pointing to the outside is arranged outside the one-way exhaust port.

[0011] A pressure gauge is provided in connection with the liquid collecting chamber or the exhaust chamber, and a pressure alarm is provided in electrical connection.

[0012] Beneficial effects of the utility model:

[0013] 1. Driven by a tiny air pump, continuous negative pressure drainage is implemented, and the drainage negative pressure is stabilized within an appropriate range;

[0014] 2. Implementing continuous portable negative pressure drainage is conducive to early bed movement for patients, which is in line with the ERAS (enhanced recovery after surgery) concept;

[0015] 3. Simple structure, low cost and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the first embodiment of the utility model;

[0017] Figure 2 This is a schematic structural diagram of a second embodiment of the utility model;

[0018] Figure 3 for Figure 1 Figure 2 Schematic diagram of explosion structure of one-way exhaust port in the middle;

[0019] Figure 4 for Figure 1 Figure 2 Schematic diagram of the one-way sealing membrane tube structure;

[0020] Label and name:

[0021] 0, water-blocking and breathable membrane; 00, one-way membrane; 01, membrane; 02, clamping diameter; 03, fixing block;

[0022] 1. Gas-liquid isolation chamber;

[0023] 2. Liquid collecting chamber; 21. Connecting port; 22. One-way sealing membrane tube; 23. Liquid discharge port; 24. Liquid discharge switch; 25. Liquid collecting soft membrane tube bag; 26. One-way exhaust port;

[0024] 3. Exhaust chamber;

[0025] 4. Exhaust port; 41. Second exhaust port; 42. Air vent; 43. Fixing hole;

[0026] 5. Micro vacuum pump. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the utility model, it is described in detail below with reference to figures and texts.

[0028] like Figure 1 , Figure 2 As shown, a portable pneumothorax drain comprises a gas-liquid isolation chamber 1, which is separated into a liquid collecting chamber 2 and an exhaust chamber 3 by a water-blocking and breathable membrane 0, and a connection port 21 for sealing and connecting the chest drainage tube is arranged on the upper part of the liquid collecting chamber 2. In essence, the liquid collecting chamber 2 is a channel for chest drainage, and both liquid and gas are drained out of the chest cavity through the drainage tube and enter the liquid collecting chamber 2 through the connection port 21. Afterwards, under the special isolation effect of the water-blocking and breathable membrane 0, which prevents liquid from passing through but allows gas to pass through freely, the liquid in the liquid collecting chamber 2 cannot enter the exhaust chamber 3 and accumulates in the liquid collecting chamber 2; the gas in the liquid collecting chamber 2 can enter the exhaust chamber 3 through the water-blocking and breathable membrane 0.

[0029] An exhaust port 4 is arranged through the side wall of the exhaust cavity 3, and a micro-vacuum pump 5 and a one-way membrane 00 pointing from the exhaust cavity 3 to the outside are arranged to seal the exhaust port 4. The micro-vacuum pump 5 unidirectionally pumps gas from the exhaust cavity 3 to the outside. Under the one-way pumping action of the micro-vacuum pump 5, the gas in the chest cavity is discharged from the body through the following route: gas in the chest cavity → chest drainage tube → connecting port 21 → liquid collection cavity 2 → water-blocking breathable membrane 0 → exhaust cavity 3 → exhaust port 4 → micro-vacuum pump 5 → one-way membrane 00 → the outside. It should be noted here that the order of the micro-vacuum pump 5 and the one-way membrane 00 inside and outside the exhaust port 4 can be alternating, that is, relative to the exhaust port 4, the micro-vacuum pump 5 can be arranged on the outside of the one-way membrane 00, or on the inside of the one-way membrane 00, and both can play the role of one-way gas pumping.

[0030] The micro suction pump 5 is electrically connected to a power supply and a power exhaustion alarm through a power cord. In order to facilitate carrying and allow the patient to move freely after chest drainage, the device needs to be as small as possible, so the power supply is preferably a battery, and the battery volume should be small, which creates a contradiction between the battery life and weight. A large weight means a long life, which is inconvenient to carry; a small weight means a short life, and it needs to be replaced in time before the battery is exhausted. The compromise is that the battery volume should not be too large, the weight is best at 100g-500g, the single use time is best at 3-10 hours, and it is equipped with a power exhaustion alarm to be replaced in time after the battery voltage drops significantly. In this way, battery replacement is not frequent, and the battery weight can also be accepted by patients. It is necessary to set fixings such as buckles on the battery box to facilitate fixing the battery box on a belt or pocket.

[0031] At the same time, in order to facilitate carrying and allow the patient to move freely after chest drainage, the volume of the gas-liquid isolation chamber 1 should be less than 200ml, and the liquid collection chamber 2 should be less than 150ml. The optimal volume is 100ml for the gas-liquid isolation chamber 1 and 90ml for the liquid collection chamber 2. In this way, the drained gas is continuously emptied under the action of the micro-vacuum pump 5, while less drainage liquid is collected in the liquid collection chamber 2, which is small in volume and light and convenient to carry.

[0032] Specifically, the micro vacuum pump 5 includes RF370, ZR370-03PM, and CJWP08, which are common micro air pumps on the market, with small size and light weight. The clinical chest drainage negative pressure is generally -10mmHg to -20mmHg, and the negative pressure is relatively weak, which can meet the use requirements.

[0033] like Figure 4 As shown, a one-way sealing membrane tube 22 is arranged in the connecting port 21. The one-way sealing membrane tube 22 is a soft tubular membrane, and one end of the one-way sealing membrane tube 22 adjacent to the chest drainage tube is fully expanded and sealedly connected with the tube cavity of the connecting port 21; the one side of the one-way sealing membrane tube 2 adjacent to the liquid collection cavity 2 is free to form a one-way sealing end.

[0034] The one-way sealed membrane tube 22 is fully expanded near one end of the chest drainage tube, and is sealed and connected to the tube cavity of the connecting port 21. The inner cavity is fully expanded to form a circular cavity with the largest inner cavity cross-sectional area, which is convenient for the drainage fluid to enter the inner cavity of the membrane tube; the one-way sealed membrane tube 22 is free near one side of the liquid collecting cavity 2 to form a one-way sealed end. During the drainage process, its inner cavity cross-sectional area has two states:

[0035] 1. In the drainage direction, when the pressure at the chest drainage tube end of the one-way sealed membrane tube 22 is greater than that at the two ends of the liquid collecting cavity, the drainage fluid (gas or liquid) can smoothly enter the membrane tube cavity through the fully expanded one-way sealed membrane tube 22. When the free one-way sealed end of the expanded one-way sealed membrane tube 22 has the largest inner cavity cross-sectional area, it is equal to the inner cavity cross-sectional area of ​​the circular cavity at the starting end, which has no obstruction to the smooth drainage.

[0036] 2. In the drainage direction, when the pressure at the end of the one-way sealed membrane tube 22 collecting cavity 2 is greater than the chest drainage tube end, the external pressure of the free one-way sealed end of the one-way sealed membrane tube 22 is greater than the pressure in the cavity, causing the free one-way sealed end of the one-way sealed membrane tube 22 to be completely compressed, forming two layers of completely fitted soft membrane layers. Although the chest drainage tube end is still maintained in the largest circular cavity, the drainage gas or liquid cannot enter the inner cavity of the one-way sealed membrane tube 22 through the one-way sealed end, thereby forming a good anti-backflow effect. At this time, the one-way sealed membrane tube 22 forms a circular tube opening at one end, and the side walls of the membrane tube at the rest of the part are compressed, forming a sheet-like structure with two layers of membrane tightly attached together.

[0037] In order to ensure smooth drainage and anti-backflow of the one-way sealing film tube 22, the circular inner cavity of the one-way sealing film tube 22 should be no less than the cross-sectional area of ​​the inner cavity of the drainage tube. At the same time, the length of the one-way sealing film tube 22 needs to be kept above 20 mm, and the optimal choice for actual implementation is 35 mm. The one-way sealing film tube 22 is made of soft medical materials, such as silicone soft film tube, rubber soft film tube, latex soft film tube, PVC or PE soft film tube.

[0038] enter Figure 1 and Figure 2 As shown, a drainage port 23 is provided at the lower part of the liquid collecting chamber 2, and a drainage switch 24 is provided to control the opening and closing of the drainage port 23; when the liquid in the liquid collecting chamber 2 is almost full, the drainage switch 24 can be opened to discharge the drainage fluid out of the body through the drainage port 23. Alternatively, a liquid collecting soft film tube bag 25 is provided in communication with the drainage port 23, and the drainage fluid is collected in the liquid collecting soft film tube bag 25. The liquid collecting soft film tube bag 25 can be replaced before the bag is full. The liquid collecting soft film tube bag 25 is provided as a film tubular bag with a blind end at one end, and a connecting port matching the drainage port 23 is provided at the other end, and the interface is conveniently installed on the drainage port 23. The tube cavity of the film tubular bag is transparent and visible, and the diameter should be less than 10 mm. The capacity scale line is printed on the side wall. After the drainage fluid is collected, the properties and capacity of the drainage fluid can be accurately obtained, which is helpful to judge the drainage condition.

[0039] like Figure 3 As shown, the utility model Figure 1 and Figure 2 A schematic diagram of a partially enlarged structure. It is also a schematic diagram of the structure of the second exhaust port 41. Specifically, the second exhaust port 41 runs through the side wall of the exhaust cavity 3, and a one-way membrane 00 pointing to the outside is set to seal the second exhaust port 41. Its function is: when the micro-vacuum pump 5 fails, the gas in the exhaust cavity 3 cannot be discharged through the exhaust port 4. At this time, the second exhaust port 41 can drain the gas in the chest cavity into the liquid collecting cavity 2 and then into the exhaust cavity 3 to be discharged from the body through the second exhaust port 41, thereby avoiding the risk of tension pneumothorax caused by the inability to discharge the gas in the chest cavity.

[0040] Specific structure such as Figure 3As shown, the exhaust port 4 or the second exhaust port 41 is set as an opening area that passes through the side wall of the exhaust cavity 3, the opening area on the outer side of the corresponding exhaust cavity 3 is set as a smooth plane, the central position of the opening area is set as a fixing hole 43 for penetrating and clamping the one-way membrane 00, the opening area is set with a few air holes 42, and an annular sealing portion is set around the outer side of the opening area for cooperating with the one-way membrane 00 to form a one-way seal. Correspondingly, the one-way membrane 00 includes a diaphragm 01 for completely covering the air hole 42 area. The surface of the diaphragm 01 is flat and smooth, and the area is larger than the area of ​​the air hole 42. A clamping diameter 02 is set at the center of the diaphragm 01 corresponding to the fixed hole 43. The outer diameter of the clamping diameter 02 is smaller than the inner diameter of the fixed hole 43 and can pass through the fixed hole 43. A fixing block 03 is set at the top of the clamping diameter 02. The fixing block 03 is larger than the fixing hole 43, and the distance between the fixing block 03 and the diaphragm 01 is similar to the thickness of the opening area. When the fixing block 03 passes through the fixing hole 43, the diaphragm 01 is tightly attached to and completely covers the surface of the opening area.

[0041] When the pressure inside the exhaust cavity 3 is greater than that outside, the pressure acts on the surface of the diaphragm 01 near the hollow area, pushing the diaphragm 01 open, so that the gas inside the exhaust cavity 3 is connected to the outside through the air holes 42; when the pressure inside the exhaust cavity 3 is less than that outside, the pressure acts on the surface of the diaphragm 01 away from the hollow area, so that the diaphragm 01 is tightly attached to and completely covers all the air holes 42, so that all the air holes 42 are blocked, thereby isolating the exhaust cavity 3 from the outside, thereby achieving a one-way ventilation effect.

[0042] Further, such as Figure 2 As shown, a one-way exhaust port 26 pointing to the outside is set through the side wall of the liquid collecting chamber 2, a water-blocking and breathable membrane 0 is sealed inside the one-way exhaust port 26, and a one-way membrane 00 pointing to the outside is set outside. The structure of the one-way exhaust port 26 is similar to Figure 3 The exhaust port 4 or the second exhaust port 41 shown in the figure is very similar in specific structure, except that a water-blocking and breathable membrane 0 is set inside the one-way membrane 00, and its function is to block the liquid in the liquid collecting chamber 2 from being connected to the outside through the one-way exhaust port 26, and at the same time, to enable the gas in the liquid collecting chamber 2 to be connected to the outside through the one-way exhaust port 26, that is, the gas in the liquid collecting chamber 2 can be discharged to the outside through the one-way exhaust port 26, and the outside gas cannot enter the liquid collecting chamber 2 through the one-way exhaust port 26. Its function is also that when the micro-vacuum pump 5 fails, the gas in the exhaust chamber 3 cannot be discharged through the exhaust port 4. At this time, the second exhaust port 41 can make the gas in the chest cavity drain into the liquid collecting chamber 2 and then into the exhaust chamber 3 and be discharged from the body through the second exhaust port 41, thereby avoiding the risk of tension pneumothorax caused by the inability to discharge the gas in the chest cavity. Its function is the same as that of the second exhaust port 41, and the two do not need to be set repeatedly.

[0043] Furthermore, a pressure gauge is provided in connection with the liquid collecting chamber 2 or the exhaust chamber 3, and a pressure alarm is provided in electrical connection. Through the setting of the pressure gauge, medical staff can visually observe the strength of the negative pressure during drainage, and set the upper and lower limits of the negative pressure alarm. When the negative pressure is too high or too low, the medical staff is reminded to handle it in time and adjust the drainage negative pressure to the optimal range. The pressure gauge is an existing component and will not be described here.

[0044] The above embodiments are merely illustrative of the principles and effects of this patent application, and are not intended to limit this patent application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of this patent application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in this patent application should still be covered by the claims of this patent application.

Claims

1. Portable pneumothorax drain, characterized by: The invention comprises a gas-liquid isolation chamber (1), wherein the gas-liquid isolation chamber (1) is separated into a liquid collecting chamber (2) and an exhaust chamber (3) by a water-blocking and breathable membrane (0); a connection port (21) for sealing and connecting to a chest drainage tube is arranged at the upper part of the liquid collecting chamber (2); an exhaust port (4) is arranged through the side wall of the exhaust chamber (3); a micro-vacuum pump (5) and a unidirectional membrane (00) pointing from the exhaust chamber (3) to the outside are arranged at the sealed exhaust port (4); the micro-vacuum pump (5) unidirectionally exhausts gas from the exhaust chamber (3) to the outside; the micro-vacuum pump (5) is electrically connected to a power supply and a power exhaustion alarm via a power line.

2. The portable pneumothorax drain according to claim 1, characterized in that: The micro air pump (5) includes RF370, ZR370-03PM, and CJWP08.

3. The portable pneumothorax drain according to claim 1, characterized in that: A one-way sealing membrane tube (22) is arranged in the connection port (21). The one-way sealing membrane tube (22) is a soft tubular membrane. One end of the one-way sealing membrane tube adjacent to the chest drainage tube is fully expanded and is sealed and connected to the tube cavity of the connection port (21). The one-way sealing membrane tube (22) is free at one side adjacent to the liquid collecting cavity (2) to form a one-way sealing end.

4. The portable pneumothorax drain according to claim 1, characterized in that: A liquid discharge port (23) is arranged at the lower part of the liquid collecting chamber (2), and a liquid discharge switch (24) is arranged to control the opening and closing of the liquid discharge port (23); or a liquid collecting soft film tube bag (25) is arranged in communication with the liquid discharge port (23).

5. The portable pneumothorax drain according to claim 1, characterized in that: A second exhaust port (41) is formed through the side wall of the exhaust cavity (3), and a one-way membrane (00) pointing to the outside is provided to seal the second exhaust port (41).

6. The portable pneumothorax drain according to claim 1, characterized in that: A one-way exhaust port (26) pointing to the outside is arranged through the side wall of the liquid collecting chamber (2), a water-blocking and breathable membrane (0) is sealed inside the one-way exhaust port (26), and a one-way membrane (00) pointing to the outside is arranged outside.

7. The portable pneumothorax drain according to claim 1, characterized in that: A pressure gauge is provided in communication with the liquid collecting chamber (2) or the exhaust chamber (3), and a pressure alarm is provided in electrical connection.

Images