CN108525101A - A kind of Portable thoracic cavity drainage tube and its moulding process - Google Patents

Abstract

The present invention provides a kind of Portable thoracic cavity drainage tube, including drainage tube, end connector, plastic outer tube, rubber elastic membrane tube core, head end connector and filter, the rubber elastic membrane tube core of duckbill is set in plastic outer tube, the circular port of rubber elastic membrane tube core is connect with end connector, and the duck bill hole of rubber elastic membrane tube core extends to below the interior top of plastic outer tube；Head end connecting tube is protruding to be connect with filter, and PES filtration membranes are equipped in filter, micron filter hole is distributed on PES filtration membranes；The tube chamber connection of drainage tube, the tube chamber of end connector, the tube chamber of rubber elastic membrane tube core, the tube chamber of head end connector, the tube chamber of lower connector, micron filter hole and upper connector, forms unidirectional drainage channel.The present invention is suitable for the stationary phase patient of the communicating pneumothorax of intractable, is also applicable to the simple pneumothorax patient being repeatedly evacuated in addition, reduces the tissue damage punctured repeatedly and other complication.

Description

A portable chest drainage tube and its molding process

technical field

The invention relates to a drainage device, in particular to a portable chest drainage tube and its forming process.

Background technique

Gas enters the pleural cavity, resulting in a pneumothorax, a state called pneumothorax, which can occur spontaneously or as a result of disease, trauma, surgery, or improper diagnostic and therapeutic procedures. Air enters the pleural cavity through the chest wall, diaphragm, mediastinum, or visceral pleura. Air in the pleural cavity often indicates an abnormality between the pleural cavity and the outside world (through the neck or chest wall), or between the pleural cavity and adjacent hollow viscera (eg, lungs, trachea, bronchi, esophagus, or subdiaphragmatic hollow viscera) aisle.

There are three common clinical classifications of pneumothorax: (1) Closed pneumothorax, if the lung compression is less than 20%, the pneumothorax can be self-absorbed by simply resting in bed, and if the lung compression is more than 20%, the symptom should be 1/1 to thoracentesis 2 days, 600-800ml each time is appropriate; (2) open pneumothorax, use closed thoracic drainage to exhaust, if the lungs cannot be re-expanded, continuous suction with negative pressure can be added; (3) tension pneumothorax, the condition is more severe In case of emergency, it is necessary to exhaust and decompress as soon as possible, and at the same time, prepare for immediate chest drainage or continuous negative pressure suction.

Chest decompression therapy is the main treatment method for pneumothorax. Closed chest drainage is to put one end of the drainage tube into the chest cavity, and the other end is connected to a water-sealed bottle lower than its position, so as to discharge gas or collect fluid in the chest cavity. This allows lung tissue to reopen and restore function. Chest decompression therapy as a treatment method is widely used in the drainage of hemothorax, pneumothorax, empyema and after thoracotomy. Common closed chest drainage systems and their principles are shown in Figures 1 to 3.

The emergence of closed thoracic drainage system has made the emergency treatment of pneumothorax patients faster and more efficient, but the drainage device is generally limited to hospital use, which significantly limits the patient's activities during use. In clinical practice, we often encounter some patients whose condition continues to fail to improve after active closed thoracic drainage. It is common in elderly people with obstructive emphysema and extremely poor lung function. Even when the lung compression is only 20% to 30% in such patients There are also obvious dyspnea, long-term chronic inflammation, repeated infection lead to pleural adhesions, and many multiple bullae near the pleura may rupture under incentives such as lifting heavy objects, coughing, sneezing, holding your breath, or shouting and laughing. Lead to refractory pneumothorax, poor wound healing effect, long course of disease, difficult surgery, high hospitalization costs, and heavy economic burden.

Contents of the invention

The technical problem to be solved by the present invention is to provide a portable chest drainage tube and its molding process, which uses the PES filter membrane to isolate bacteria in the air, avoids the direct communication between the chest cavity and the outside atmosphere, reduces the chance of infection, and can significantly reduce the hospitalization time of patients. Reducing the time of patients using antibiotics is of great benefit to improving the long-term survival rate of patients, and can significantly improve the quality of life of patients.

In order to solve the above-mentioned technical problems, the present invention provides a portable chest drainage tube, comprising a drainage tube, a tail end joint, a plastic outer tube, a rubber elastic membrane tube core, a head end joint and a filter, wherein,

One end of the drainage tube is connected to the drainage tube of the patient's pleural cavity, and the other end is connected to the tail end connector;

One end of the tail joint away from the drainage tube is inserted into the plastic outer tube;

The rubber elastic film tube core is arranged in the plastic outer tube, which is a duckbill-shaped structure with a round mouth at one end and a duckbill mouth at one end. The round mouth of the rubber elastic film tube core is connected to the tail end joint, and the rubber elastic film tube core The duckbill of the elastic film tube core extends below the inner top of the plastic outer tube;

The head-end connector is integrally formed by the bottom of the head-end plate and the head-end connecting pipe. A hole is opened on the top of the plastic outer pipe. The head-end connecting pipe protrudes outward from the hole. The head-end plate bottom is clamped on the inner side of the plastic outer tube;

The filter includes a lower connecting pipe, a filter body and an upper connecting pipe, the lower connecting pipe is in sealing connection with the head-end connecting pipe, the filter body is provided with a PES filter membrane, and the PES filter membrane is distributed with Micron filter holes;

The drainage tube, the lumen of the tail end joint, the lumen of the rubber elastic film tube core, the lumen of the head end joint, the lumen of the lower connecting tube, the micron filter hole and the lumen of the upper connecting tube are connected to form a single to the drainage channel.

Wherein, the outer diameter of the rubber elastic film tube core gradually decreases from the circular mouth to the duckbill mouth, and there is a gap between the outer wall of the rubber elastic film tube core and the inner wall of the plastic outer tube.

Preferably, the tail end joint is integrally connected from bottom to top by a thin circular pipe section, an inverted conical section and a thick circular pipe section, the outer tapered surface of the inverted tapered section is provided with oblique fins, and the thick circular pipe section The lower end of the pipe section, the inverted tapered section and the thin round pipe section are located below the plastic outer pipe, and the upper end of the thick round pipe section is inserted into the plastic outer pipe.

Further, the bottom end of the plastic outer tube is sealingly connected with an end cover, and the end cover is provided with a mounting hole, and the tail end joint is sealingly connected with the mounting hole.

Wherein, the upper connecting tube is connected with a syringe or a negative pressure drainage device.

Preferably, the inside of the filter body is an oblate cavity, the PES filter membrane is laid in the oblate cavity, and the round edge of the PES filter membrane is welded to the inner side wall of the oblate cavity.

Further, the filter body includes an oblate shell integrally formed with the lower connecting pipe, and a conical shell cover integrally formed with the upper connecting pipe, the PES filter membrane is laid in the oblate shell, and the conical The shell cover sealing cover is arranged on the top of the oblate shell.

The present invention also provides a molding process of a portable chest drainage tube, comprising the following steps:

(1) Processing plastic outer tube: use polypropylene material, inorganic antibacterial agent, plasticizer, stabilizer, impact modifier to prepare medical antibacterial plastic granules, and then place medical antibacterial plastic granules in the injection molding machine for injection molding Forming cylindrical plastic outer tubes and end caps;

(2) Preparation of the rubber elastic film tube core: put the latex solution in the blow molding machine to blow mold the blank of the rubber elastic film tube core, then cut off the top of the rubber elastic film tube core blank to form a duckbill mouth, the bottom end Open a round mouth to make a rubber elastic film tube core with a round mouth at one end and a duckbill mouth at one end;

(3) Process and filter the body: use polypropylene materials, inorganic antibacterial agents, plasticizers, stabilizers, and impact modifiers to prepare medical antibacterial plastic particles, and then place the medical antibacterial plastic particles in the injection molding machine for injection molding An integrated structure connecting the lower connecting pipe and the oblate shell, and an integrated structure connecting the upper connecting pipe and the conical cover;

(4) Cut the PES filter membrane, the outer diameter of the PES filter membrane is not less than the inner diameter of the oblate shell obtained in step (3), and then punch out multiple micron-scale filter holes on the PES filter membrane, and use For filtering bacteria in gases and liquids;

(5) thermoplastically welding the outer edge of the PES filter membrane processed in step (4) to the inner wall surface of the oblate shell, and ensuring that the weld seam is sealed;

(6) Injection molding tail end connector and head end connector;

(7) Assembly:

(7-1) The head-end connecting tube of the head-end joint protrudes outward from the hole on the top of the plastic outer tube, and the head-end disc bottom of the head-end joint is set on the inner side of the plastic outer tube, and the head-end joint and the plastic outer tube The joints are sealed;

(7-2) The tail end joint is connected with the end cover, and the connection is guaranteed to be sealed;

(7-3) The round mouth end of the rubber elastic film tube core is fixed and sealed with the thick round pipe section of the end joint;

(7-4) In step (7-3), the end cap carrying the tail joint and the rubber elastic film core is sealed and connected to the bottom end of the plastic outer tube, so that the rubber elastic film core is placed in the plastic outer tube and the rubber elastic film The upper end of the tube core is located below the inner top of the plastic outer tube, and there is a gap between the outer wall of the rubber elastic film tube core and the inner wall of the plastic outer tube;

(7-5) The head-end connecting tube of the head-end connector is inserted into the lower connecting tube, and the inner cavity of the filter body communicates with the inner cavity of the plastic outer tube through the lumen of the lower connecting tube and the lumen of the head-end connecting tube. Portable The chest drainage tube is assembled;

(7-6) After the portable chest drainage tube is assembled, it is sterilized by high temperature to ensure the asepticity of the chest drainage tube.

Wherein, in the step (1), the preparation of medical antibacterial plastic particles includes the following steps:

(1-1) 100 parts by weight of polypropylene material, 0.1 to 5 parts by weight of inorganic antibacterial agent, 30 to 50 parts by weight of plasticizer, 2 to 5 parts by weight of stabilizer, and 10 to 30 parts by weight of impact modifier The proportion is mixed evenly to make a composite material;

(1-2) Put the composite material in a plastic extruder, extrude it at a temperature of 150-180°C and cut it into pellets with a pelletizer to obtain medical antibacterial plastic pellets.

The beneficial effects of the above-mentioned technical solution of the present invention are as follows: in the present invention, the PES filter membrane isolates the bacteria in the air, avoids direct communication between the chest cavity and the outside atmosphere, reduces the chance of infection, can significantly reduce the hospitalization time of the patient, and reduce the time for the patient to use antibiotics. Improving the long-term survival rate of patients has great benefits, and at the same time does not affect the general life activities of patients, which can significantly improve the quality of life of patients. The invention is suitable for patients with intractable communicating pneumothorax in the stable stage, and also suitable for patients with simple pneumothorax who need repeated air pumping, reducing tissue damage and other puncture complications caused by repeated punctures.

Description of drawings

Fig. 1 is the existing single-bottle chest cavity drainage system and schematic diagram in the background technology of the present invention;

Fig. 2 is the existing two-bottle chest cavity drainage system and schematic diagram in the background technology of the present invention;

Fig. 3 is the existing three-bottle thoracic closed drainage system and schematic diagram in the background technology of the present invention;

Fig. 4 is the front view of Embodiment 1 of the present invention;

Figure 5 is a sectional view of Embodiment 1 of the present invention;

Fig. 6 is a schematic structural view of the PES filter membrane in Example 1.

Explanation of reference signs:

1. Drainage tube; 2. Tail end joint; 20. Thin round tube section; 21. Inverted tapered section; 22. Thick round tube section; 3. Plastic outer tube; 4. Rubber elastic film tube core; 5. Head end joint; 50. Head end plate bottom; 51. Head end connecting pipe; 6. Filter; 60. Lower connecting pipe; 61. Filtration body; 62. Upper connecting pipe; 7. PES filter membrane; 70. Micron filter hole; 8. End cap.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Fig. 4 and Fig. 5, the present invention provides a portable chest drainage tube, comprising a drainage tube 1, a tail end connector 2, a plastic outer tube 3, a rubber elastic film tube core 4, a head end connector 5 and a filter 6, in,

One end of the drainage tube 1 is connected to the drainage tube of the patient's pleural cavity, and the other end is connected to the tail end connector 2; wherein, the tail end connector 2 can be directly or indirectly connected to drainage tubes of different apertures through adapters of different sizes, which is convenient drainage.

One end of the tail joint 2 away from the drainage tube 1 is inserted into the plastic outer tube 3;

The rubber elastic film tube core 4 is arranged in the plastic outer tube 3, which is a duckbill-shaped structure with a round mouth at one end and a duckbill mouth at one end. connected, the duckbill mouth of the rubber elastic film tube core 4 extends to the bottom of the inner top of the plastic outer tube 3;

The head-end joint 5 is integrally formed by the head-end pan bottom 50 and the head-end connecting pipe 51, and a hole (light hole or threaded hole) is opened on the top of the plastic outer tube 3, and the head-end connecting pipe 51 is formed from the hole to the protruding outward, the head end disc bottom 50 is clamped on the inner side of the plastic outer tube 3;

The filter 6 includes a lower connecting pipe 60, a filter body 61 and an upper connecting pipe 62. The lower connecting pipe 60 is tightly connected to the head-end connecting pipe 51 (it can be directly inserted or screwed), and the filter The body 61 is provided with a PES filter membrane 7, and the PES filter membrane 7 is distributed with micron filter holes 70, the pore diameter of the micron filter holes 70 is 0.22 μm, which can filter bacteria, as shown in Figure 6, the The upper connecting pipe 62 can be connected with a syringe or externally connected with negative pressure equipment.

The drainage tube 1, the lumen of the tail end joint 2, the lumen of the rubber elastic film tube core 4, the lumen of the head end joint 5, the lumen of the lower connecting pipe 60, the micron filter hole 70 and the upper connecting pipe 62 The lumen of the tube is connected to form a one-way drainage channel. One-way means: gas or liquid can flow from the drainage tube to the filter direction, but cannot flow from the filter to the drainage tube direction, because when there is gas or liquid self-filtering After the device enters, the duckbill mouth of the rubber elastic membrane tube core will be closed to prevent gas or liquid from entering the patient's chest cavity.

The outer diameter of the rubber elastic film tube core 4 gradually decreases from the circular mouth to the duckbill mouth, and there is a gap between the outer wall of the rubber elastic film tube core 4 and the inner wall of the plastic outer tube 3 .

The tail joint 2 is integrally connected from bottom to top by a thin round pipe section 20, an inverted tapered section 21 and a thick round pipe section 22. The outer tapered surface of the inverted tapered section 21 is provided with oblique fins. The lower end of the thick round tube section 22 , the inverted tapered section 21 and the thin round tube section 20 are located below the plastic outer tube 3 , and the upper end of the thick round tube section 22 is inserted into the plastic outer tube 3 .

The bottom end of the plastic outer tube 3 is sealed and connected with an end cap 8, and the end cap 8 is provided with a mounting hole, and the tail end joint 2 is sealed and connected with the mounting hole.

The inside of the filter body 61 is an oblate cavity, the PES filter membrane 7 is laid in the oblate cavity, and the outer edge of the PES filter membrane 7 is welded to the inner wall of the oblate cavity.

In this embodiment, the filter body 61 includes an oblate shell integrally formed with the lower connecting pipe 60, and a conical shell cover integrally formed with the upper connecting pipe 62, and the PES filter membrane 7 is laid on the oblate shell. In the casing, the conical casing cover sealing cover is arranged above the oblate casing.

The present invention also provides a molding process of a portable chest drainage tube, comprising the following steps:

(1) Processing plastic outer tube: use polypropylene material, inorganic antibacterial agent, plasticizer, stabilizer, impact modifier to prepare medical antibacterial plastic granules, and then place medical antibacterial plastic granules in the injection molding machine for injection molding Forming cylindrical plastic outer tubes and end caps;

Wherein, the preparation of medical antibacterial plastic particles comprises the following steps:

(1-1) 100 parts by weight of polypropylene material, 0.1 to 5 parts by weight of inorganic antibacterial agent, 30 to 50 parts by weight of plasticizer, 2 to 5 parts by weight of stabilizer, and 10 to 30 parts by weight of impact modifier The proportion is mixed evenly to make a composite material;

(1-2) Put the composite material in a plastic extruder, extrude it at a temperature of 150-180°C and cut it into pellets with a pelletizer to obtain medical antibacterial plastic pellets.

(2) Preparation of the rubber elastic film tube core: put the latex solution in the blow molding machine to blow mold the blank of the rubber elastic film tube core, then cut off the top of the rubber elastic film tube core blank to form a duckbill mouth, the bottom end Open a round mouth to make a rubber elastic film tube core with a round mouth at one end and a duckbill mouth at one end;

(3) Process and filter the body: use polypropylene materials, inorganic antibacterial agents, plasticizers, stabilizers, and impact modifiers to prepare medical antibacterial plastic particles, and then place the medical antibacterial plastic particles in the injection molding machine for injection molding An integrated structure connecting the lower connecting pipe and the oblate shell, and an integrated structure connecting the upper connecting pipe and the conical cover;

(4) Cut the PES filter membrane, the outer diameter of the PES filter membrane is not less than the inner diameter of the oblate shell obtained in step (3), and then punch out multiple micron-scale filter holes on the PES filter membrane, and use For filtering bacteria in gas or liquid;

(5) thermoplastically welding the outer edge of the PES filter membrane processed in step (4) to the inner wall surface of the oblate shell, and ensuring that the weld seam is sealed;

(6) Injection molding tail end connector and head end connector;

(7) Assembly:

(7-1) The head-end connecting tube of the head-end joint protrudes outward from the hole on the top of the plastic outer tube, and the head-end disc bottom of the head-end joint is set on the inner side of the plastic outer tube, and the head-end joint and the plastic outer tube The joints are sealed;

(7-2) The tail end joint is connected with the end cover, and the connection is guaranteed to be sealed;

(7-3) The round mouth end of the rubber elastic film tube core is fixed and sealed with the thick round pipe section of the end joint;

(7-4) In step (7-3), the end cap carrying the tail joint and the rubber elastic film core is sealed and connected to the bottom end of the plastic outer tube, so that the rubber elastic film core is placed in the plastic outer tube and the rubber elastic film The upper end of the tube core is located below the inner top of the plastic outer tube, and there is a gap between the outer wall of the rubber elastic film tube core and the inner wall of the plastic outer tube;

(7-5) The head-end connecting tube of the head-end connector is inserted into the lower connecting tube, and the inner cavity of the filter body communicates with the inner cavity of the plastic outer tube through the lumen of the lower connecting tube and the lumen of the head-end connecting tube. Portable The chest drainage tube is assembled;

(7-6) After the portable chest drainage tube is assembled, it is sterilized by high temperature to ensure the asepticity of the chest drainage tube.

In the above assembly process, butyl rubber sealing rings can be optionally used at the joints between the parts in order to achieve a sealing effect.

The device molding, assembly and sterilization of the portable chest drainage tube are completed above for clinical use.

In clinical use, the thin round tube section of the tail end connector is inserted into the drainage tube placed in the patient's pleural cavity to complete the purpose of portable drainage and exhaust, or an external syringe or negative pressure drainage device is connected to complete the one-way drainage of liquid. If the filter is clogged and the drainage is not smooth, it can be replaced separately.

The working principle of the present invention is: the gas or liquid in the patient's thoracic cavity passes through the drainage tube 1, the lumen of the tail end joint 2, the lumen of the rubber elastic membrane tube core 4, the lumen of the head end joint 5, and the lumen of the lower connecting tube 60. The lumen, the micron filter hole 70 and the lumen of the upper connecting tube 62 are drained out of the patient's body under the suction of the syringe connected to the upper connecting tube 62 or the external negative pressure mechanism. The drainage channel of the present invention is a one-way channel. One-way means: gas or liquid can flow from the drainage tube to the filter direction, but cannot flow from the filter to the drainage tube direction, because when gas or liquid enters from the filter, the duck of the rubber elastic film core The mouth will close, preventing air or liquid from entering the patient's chest cavity.

In the present invention, the PES filter membrane isolates the bacteria in the air, avoids the direct communication between the chest cavity and the outside atmosphere, reduces the chance of infection, can significantly reduce the hospitalization time of patients, reduce the use time of antibiotics for patients, and greatly improve the long-term survival rate of patients. It can also significantly improve the quality of life of patients. The present invention is suitable for patients with intractable communicating pneumothorax in the stable stage, and also suitable for patients with simple pneumothorax who need to repeatedly pump air, reducing the pain of patients, puncture pain and tissue damage.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. a portable chest cavity drainage tube, is characterized in that, comprises drainage tube, tail-end joint, plastic outer tube, rubber elastic film tube core, head-end joint and filter, wherein, One end of the drainage tube is connected to the drainage tube of the patient's pleural cavity, and the other end is connected to the tail end connector; One end of the tail joint away from the drainage tube is inserted into the plastic outer tube; The rubber elastic film tube core is arranged in the plastic outer tube, which is a duckbill-shaped structure with a round mouth at one end and a duckbill mouth at one end. The round mouth of the rubber elastic film tube core is connected to the tail end joint, and the rubber elastic film tube core The duckbill of the elastic film tube core extends below the inner top of the plastic outer tube; The head-end connector is integrally formed by the bottom of the head-end plate and the head-end connecting pipe. A hole is opened on the top of the plastic outer pipe. The head-end connecting pipe protrudes outward from the hole. The head-end plate bottom is clamped on the inner side of the plastic outer tube; The filter includes a lower connecting pipe, a filter body and an upper connecting pipe, the lower connecting pipe is in sealing connection with the head-end connecting pipe, the filter body is provided with a PES filter membrane, and the PES filter membrane is distributed with Micron filter holes; The drainage tube, the lumen of the tail end joint, the lumen of the rubber elastic film tube core, the lumen of the head end joint, the lumen of the lower connecting tube, the micron filter hole and the lumen of the upper connecting tube are connected to form a single to the drainage channel. 2. The portable chest drainage tube according to claim 1, characterized in that, the outer diameter of the rubber elastic film tube core gradually decreases from the circular mouth to the duckbill mouth, and the outer wall of the rubber elastic film tube core is in contact with the plastic outer wall. There is a gap between the inner walls of the tube. 3. The portable chest drainage tube according to claim 1, characterized in that, the tail end connector is integrally connected from bottom to top by a thin circular tube section, an inverted tapered section and a thick circular tube section, and the inverted tapered section The outer tapered surface of the segment is provided with oblique fins, the lower end of the thick circular tube segment, the inverted tapered segment and the thin circular tube segment are located below the plastic outer tube, and the upper end of the thick circular tube segment is inserted into the plastic outer tube. 4. The portable chest drainage tube according to claim 1 or 3, wherein the bottom end of the plastic outer tube is sealed and connected with an end cap, the end cap is provided with a mounting hole, and the tail end connector is connected to Mounting holes seal the connection. 5. The portable chest drainage tube according to claim 1, wherein the upper connecting tube is connected to a syringe or a negative pressure drainage device. 6. The portable chest drainage tube according to claim 1, wherein the filter body is an oblate cavity, the PES filter membrane is laid in the oblate cavity, and the PES filter membrane The round edge of the cylinder is welded with the inner side wall of the oblate cavity. 7. The portable chest drainage tube according to claim 1 or 6, wherein the filter body comprises an oblate shell integrally formed with the lower connecting tube, a conical shell cover integrally formed with the upper connecting tube, The PES filter membrane is laid in the oblate shell, and the sealing cover of the conical shell is arranged above the oblate shell. 8. A molding process of the portable chest drainage tube according to any one of claims 1 to 7, characterized in that, comprising the steps: (1) Processing plastic outer tube: use polypropylene material, inorganic antibacterial agent, plasticizer, stabilizer, impact modifier to prepare medical antibacterial plastic granules, and then place medical antibacterial plastic granules in the injection molding machine for injection molding Forming cylindrical plastic outer tubes and end caps; (2) Preparation of the rubber elastic film tube core: put the latex solution in the blow molding machine to blow mold the blank of the rubber elastic film tube core, then cut off the top of the rubber elastic film tube core blank to form a duckbill mouth, the bottom end Open a round mouth to make a rubber elastic membrane tube core with a round mouth at one end and a duckbill mouth at one end; (3) Process and filter the body: use polypropylene materials, inorganic antibacterial agents, plasticizers, stabilizers, and impact modifiers to prepare medical antibacterial plastic particles, and then place the medical antibacterial plastic particles in the injection molding machine for injection molding An integrated structure connecting the lower connecting pipe and the oblate shell, and an integrated structure connecting the upper connecting pipe and the conical cover; (4) Cut the PES filter membrane, the outer diameter of the PES filter membrane is not less than the inner diameter of the oblate shell obtained in step (3), and then punch out multiple micron-scale filter holes on the PES filter membrane, and use For filtering bacteria in gases and liquids; (5) thermoplastically welding the outer edge of the PES filter membrane processed in step (4) to the inner wall surface of the oblate shell, and ensuring that the weld seam is sealed; (6) Injection molding tail end connector and head end connector; (7) Assembly: (7-1) The head-end connecting tube of the head-end joint protrudes outward from the hole on the top of the plastic outer tube, and the head-end disc bottom of the head-end joint is set on the inner side of the plastic outer tube, and the head-end joint and the plastic outer tube The joints are sealed; (7-2) The tail end joint is connected to the end cover, and the connection is guaranteed to be sealed; (7-3) The round mouth end of the rubber elastic film tube core is fixed and sealed with the thick round pipe section of the end joint; (7-4) In step (7-3), the end cap carrying the tail joint and the rubber elastic film core is sealed and connected to the bottom end of the plastic outer tube, so that the rubber elastic film core is placed in the plastic outer tube and the rubber elastic film The upper end of the tube core is located below the inner top of the plastic outer tube, and there is a gap between the outer wall of the rubber elastic film tube core and the inner wall of the plastic outer tube; (7-5) The head-end connecting tube of the head-end connector is inserted into the lower connecting tube, and the inner cavity of the filter body communicates with the inner cavity of the plastic outer tube through the lumen of the lower connecting tube and the lumen of the head-end connecting tube. Portable The chest drainage tube is assembled; (7-6) After the portable chest drainage tube is assembled, it is sterilized by high temperature to ensure the asepticity of the chest drainage tube. 9. The molding process of the portable chest drainage tube according to claim 7, characterized in that, in the step (1), the preparation of medical antibacterial plastic particles comprises the following steps: (1-1) 100 parts by weight of polypropylene material, 0.1 to 5 parts by weight of inorganic antibacterial agent, 30 to 50 parts by weight of plasticizer, 2 to 5 parts by weight of stabilizer, and 10 to 30 parts by weight of impact modifier The proportion is mixed evenly to make a composite material; (1-2) Put the composite material in a plastic extruder, extrude it at a temperature of 150-180°C and cut it into pellets with a pelletizer to obtain medical antibacterial plastic pellets.