Closed thoracic drainage device and drainage system

Abstract

The utility model provides a thoracic cavity closed drainage device and a drainage system, which are applied to the technical field of medical instruments and are divided into hemopneumothorax patients with chest wall defects and hemopneumothorax patients with non-chest wall defects. According to the technical scheme, the drainage device is characterized by comprising a drainage tube and a puncture cone installed in the drainage tube in a drawing and inserting mode; the tip of the puncture cone extends out of an opening in one end of the drainage tube; a flow guide groove is axially formed in the side wall of the puncture cone; an inflation bag is arranged on the outer side wall of the drainage tube close to one side of the tip of the puncture cone, an inflation tube connected with the inflation bag is axially fixed on the side wall of the drainage tube, and an air valve is arranged at the tail end of the inflation tube; a fixing buckle is detachably fixed on the drainage tube close to one side of the tail end of the puncture cone; the thoracic cavity drainage tube has the technical effects that the drainage tube can be firmly fixed after being inserted into the thoracic cavity, so that the drainage tube is prevented from moving in the drainage process to bring secondary injury to a wounded person.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a closed chest drainage device and a drainage system. Background Art

[0002] Chest war and trauma often cause acute hemothorax, pneumothorax or hemo-pneumothorax. Closed chest drainage is the main operation for early emergency treatment. Its main purpose is to drain the gas or fluid in the chest, restore the negative pressure in the pleural cavity, relieve lung compression, relieve dyspnea symptoms, and save the life of the injured.

[0003] At present, the Chinese utility model with publication number CN202920775U discloses a closed chest drainage system, which includes a sleeve, a needle core and a drainage tube. The needle core is a round rod structure with a steel needle inside. One end of the needle core is a pointed structure, and the other end of the needle core is provided with a block with a handle. The needle core is provided with a sleeve with a boss outside. The drainage tube is a cylindrical structure. The outer wall of the drainage tube cooperates with the inner wall of the sleeve. There are multiple liquid inlets on the side wall of one end of the drainage tube, and a liquid outlet at the other end of the drainage tube.

[0004] In existing closed chest drainage systems, the drainage tube is often fixed with sutures after insertion into the chest cavity. This involves sewing a suture onto the skin on the side of the tube and then tying the distal end of the suture onto the tube for securement. However, this method is ineffective. Because the suture requires approximately 1 cm in length, the tube has ample room to maneuver, resulting in insecure fixation. This can easily lead to the tube becoming dislodged or invaginated due to loosening or breaking of the suture. Furthermore, repeated sliding of the tube within the incision can damage surrounding tissue or puncture lung tissue. Furthermore, suturing the sutures is invasive, and when the tube moves, the sutures can pull on the skin, causing secondary injury to the patient. Utility Model Content

[0005] The purpose of the utility model is to provide a closed chest drain and drainage system, which has the advantage that it can be directly inserted into the chest cavity through a "straight-in" design, and the drainage tube can be conveniently and firmly fixed after insertion into the chest cavity, thereby preventing the drainage tube from shifting during the drainage process and causing secondary damage to the injured.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides the following technical solutions:

[0007] A closed chest drainage device comprises a drainage tube and a puncture cone installed in the drainage tube in a pull-in manner; the tip of the puncture cone extends from an opening at one end of the drainage tube; a guide groove is axially provided on the side wall of the puncture cone;

[0008] An inflatable bag is fixedly provided on the drainage tube near the tip of the puncture cone, an inflatable tube connected to the inflatable bag is axially fixed on the side wall of the drainage tube, and an air valve is provided at the tail end of the inflatable tube;

[0009] A fixing buckle is detachably fixed on the drainage tube on one side close to the tail end of the puncture cone.

[0010] With the above technical solution, a puncture cone is built into the drainage tube, and the chest wall is punctured through the puncture cone to place the drainage tube into the chest cavity, thereby shortening the operation time and improving the treatment efficiency; the diversion groove makes it easy to observe whether the puncture is in place; when the puncture cone is inserted into the chest cavity, the gas or liquid in the chest cavity flows out of the diversion groove, and the gas and liquid discharge in the diversion groove can be observed in time through the transparent drainage tube to judge the puncture situation of the puncture cone, thereby avoiding excessive puncture and causing secondary injury to the victim;

[0011] The inflatable bag and the fixing buckle are used to firmly fix the drainage tube on the chest wall, thereby preventing the drainage tube from sinking in or falling out, and avoiding secondary injury to the injured person.

[0012] In one embodiment of the present invention, an auxiliary drainage hole is opened on the side wall of the drainage tube close to the tapered end of the puncture cone.

[0013] Through the above technical solution, the auxiliary drainage hole is used to prevent the lung from blocking the main drainage port, thereby improving the efficiency of hydropneumothorax discharge.

[0014] In one embodiment of the present invention, a conical closing tube is integrally formed on the end of the drainage tube close to the tip of the puncture cone.

[0015] Through the above technical solution, the tapered closing tube is used to limit the puncture cone from excessively protruding from the front end of the slightly softer drainage tube during the puncture process, thereby reducing secondary damage.

[0016] In one embodiment of the present invention, the fixing buckle includes a fixing sleeve and an annular pad integrally formed on the fixing sleeve; openings are provided on both the fixing sleeve and the annular pad, and a locking buckle is provided on the side wall of the fixing sleeve.

[0017] Through the above technical solution, the fixed sleeve and the annular pad are mounted on the drainage tube through the opening; the locking buckle is used to lock the opening on the fixed sleeve so that the fixed sleeve is pressed tightly against the drainage tube, thereby fixing the fixed sleeve and the annular pad on the drainage tube, thereby preventing the drainage tube from sinking inward.

[0018] In one embodiment of the present invention, a handle is integrally formed at the tail end of the puncture cone, and the diameter of the handle is larger than the outer diameter of the drainage tube.

[0019] Through the above technical solution, the handle is used to facilitate holding the puncture cone, and the handle diameter is larger than the outer diameter of the drainage tube, which can also prevent the puncture from being too deep or the drainage tube from falling out backwards during the puncture process.

[0020] In one embodiment of the present invention, the inflatable bag abuts against the inner wall of the chest wall, and the fixing buckle abuts against the outer wall of the chest wall; a dressing layer is padded between the fixing buckle and the outer wall of the chest wall.

[0021] Through the above technical solution, in the absence of chest wall defects, the chest wall is punctured with a puncture cone to insert the drainage tube into the chest cavity, wherein the uninflated air bag enters the chest cavity together with the drainage tube; after the air bag is inflated, the air bag abuts against the inner wall of the chest wall to prevent the drainage tube from falling out of the chest wall, and the fixing buckle abuts against the outer wall of the chest wall to prevent the drainage tube from sinking into the inside of the chest wall, thereby achieving the goal of quickly and firmly fixing the drainage tube on the chest wall, thereby preventing the drainage tube from sinking in or falling out; the dressing layer can cover the skin around the drainage tube to play a hemostatic and antibacterial role.

[0022] In one embodiment of the present invention, the inflatable bag includes a filling portion and an inner abutting portion and an outer abutting portion respectively provided on both sides of the filling portion; the diameters of the inner abutting portion and the outer abutting portion are both larger than the diameter of the filling portion; the filling portion fills the defective chest wall; the inner abutting portion abuts against the inner wall of the chest wall, and the outer abutting portion abuts against the outer wall of the chest wall;

[0023] The fixing buckle abuts against the outer abutting portion.

[0024] With the above technical solution, in the case of a chest wall defect, the drainage tube is placed into the chest cavity under the guidance of a puncture cone, and the uninflated inflatable bag is located at the location of the chest wall defect. By inflating the inflatable bag, the filling portion is used to temporarily fill the chest wall defect, so that the patient with the chest wall defect can simultaneously achieve closed chest drainage on the basis of closing the defect wound, and the air bag can compress the chest wall wound edge to achieve a hemostatic effect.

[0025] The inner abutting portion and the outer abutting portion are used to abut against the inner and outer side walls of the chest wall, and firmly fix the drainage tube by cooperating with the fixing buckle, thereby preventing the drainage tube from sinking in or falling out.

[0026] The utility model also provides a closed chest drainage system, comprising the above-mentioned drain device, and further comprising a connecting tube connected to the drainage tube after the puncture cone is withdrawn, and a drainage bag connected to the connecting tube, wherein the connecting tube and the drainage bag are connected via a one-way valve;

[0027] An exhaust valve is provided above the drainage bag;

[0028] A drain valve is provided at the bottom of the drainage bag.

[0029] Through the above technical solution, after the puncture cone penetrates the chest cavity, the puncture cone is pulled out of the drainage tube, and the connecting tube is connected to one end of the drainage tube, so that the gas or liquid in the chest cavity flows to the drainage bag through the drainage tube and the connecting tube. The one-way valve prevents the liquid and gas in the drainage bag from flowing back; the exhaust valve is used to discharge the gas in the drainage bag; and the drain valve is used to discharge the liquid in the drainage bag.

[0030] As described above, the closed chest drainage device and drainage system of the present invention have the following beneficial effects:

[0031] 1. By designing a drainage tube with a puncture cone, a "direct insertion" design is achieved, so that the drainage tube can be directly inserted into the chest cavity through puncture, achieving rapid tube placement;

[0032] 2. A guide groove is provided on the edge of the puncture cone. When the puncture cone is inserted into the chest cavity, it can be observed whether there is any gas or liquid discharged, so as to confirm that the drainage tube has entered the chest cavity and stop the puncture cone from entering in time to prevent excessive puncture and damage to organs.

[0033] 3. When there is no defect in the chest wall, the inflatable bag and the fixing buckle are designed to quickly and firmly fix the drainage tube to prevent the drainage tube from sinking in or falling out. When there is a defect in the chest wall, the filling part is used to temporarily fill the chest wall defect, so that the patient with the chest wall defect can complete the closed chest drainage operation simultaneously on the basis of closing the defect wound, and the air bag can compress the edge of the chest wall defect to achieve a hemostatic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of the flow diverter of Example 1 of the present utility model;

[0035] Figure 2 This is a schematic structural diagram of the drainage tube of Example 1 of the present utility model;

[0036] Figure 3 This is a structural diagram of a drainage tube in Example 1 of the present invention having a tapered closing tube at one end;

[0037] Figure 4 This is a schematic structural diagram of the puncture cone of Example 1 of the present utility model;

[0038] Figure 5 This is a right side view of the fixing buckle structure of Example 1 of the present utility model;

[0039] Figure 6 This is a schematic structural diagram of the fixing buckle of Example 1 of the present utility model;

[0040] Figure 7 This is a schematic structural diagram of the flow diverter of Example 2 of the present utility model;

[0041] Figure 8It is a structural diagram of the drainage system of Example 3 of the present utility model.

[0042] Figure numerals: 1. drainage tube; 2. puncture cone; 3. guide groove; 4. inflatable bag; 5. inflatable tube; 6. fixing buckle; 7. auxiliary drainage hole; 8. conical closing tube; 61. fixing sleeve; 62. annular pad; 63. locking buckle; 12. handle; 13. dressing layer; 41. filling part; 42. inner abutment part; 43. outer abutment part; 17. connecting tube; 18. two-way connector; 19. drainage bag; 23. drain valve; 25. chest wall; 26. one-way valve; 27. exhaust valve. DETAILED DESCRIPTION

[0043] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0044] See also Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0045] Example 1

[0046] See also Figures 1 to 4The utility model provides a chest cavity closed drainage device, comprising a drainage tube 1 and a puncture cone 2. The puncture cone 2 is installed in the drainage tube 1 in a plug-in manner. The chest wall 25 is punctured by the puncture cone 2 to insert the drainage tube 1 into the chest cavity together, thereby realizing rapid tube placement, shortening the operation time, and improving the treatment efficiency. The length of the puncture cone 2 is greater than that of the drainage tube 1, and the tip of the puncture cone 2 extends from the opening at one end of the drainage tube 1. A guide groove 3 is axially arranged on the side wall of the puncture cone 2. The guide groove 3 facilitates observation of whether the puncture is in place. When the puncture cone 2 punctures the chest wall 25, the gas or liquid in the chest cavity flows out from the guide groove 3, the liquid and gas discharge in the guide groove 3 can be observed in time through the transparent drainage tube 1, and the puncture depth of the puncture cone 2 can be judged to avoid excessive penetration and damage to the internal organs of the chest cavity; the tail end of the puncture cone 2 is integrally formed with a handle 12, which is used to facilitate holding the puncture cone; and the diameter of the handle 12 is larger than the outer diameter of the drainage tube 1, so that the handle 12 can prevent the puncture from being too deep or the drainage tube from falling out backwards during the puncture process; wherein the handle 12 is provided with a channel connected to the guide groove 3; the channel can be opened or blocked in time as needed to prevent liquid from flowing out and contaminating the dressing or the operator;

[0047] A plurality of auxiliary drainage holes 7 are provided on the side wall of the drainage tube 1 near the pointed end of the puncture cone 2. The auxiliary drainage holes 7 are used to improve the liquid discharge efficiency and avoid the main hole being blocked to cause poor liquid and gas discharge.

[0048] Scale lines are provided on the outer wall of the drainage tube 1 along the axial direction of the drainage tube 1, and the scale lines facilitate observation of the length of the drainage tube inserted into the chest cavity;

[0049] In this embodiment, a conical closing tube 8 is integrally formed at the end of the drainage tube 1 near the tip of the puncture cone 2. The conical closing tube 8 is used to cooperate with the handle 12 to prevent the drainage tube 1 from sliding backward during the puncture process.

[0050] See also Figures 1 to 4 An inflatable bag 4 is integrally made on the outer tube wall of the drainage tube 1 near the tip of the puncture cone 2. The inflatable bag 4 in this embodiment is a ring-shaped airbag structure; an inflatable tube 5 connected to the inflatable bag 4 is axially fixed on the side wall of the drainage tube 1. The inflatable tube 5 in this embodiment is partially embedded and fixed on the outer side wall of the drainage tube, reducing the width of the tube body inserted into the incision, thereby reducing the degree of secondary damage to the injured person; an air valve is provided at the tail end of the inflatable tube 5; a fixing buckle 6 is detachably fixed on the drainage tube 1 near the tail end of the puncture cone 2, the inflatable bag 4 abuts the inner wall of the chest wall 25, and the fixing buckle 6 abuts the outer wall of the chest wall 25. The inflatable bag 4 and the fixing buckle 6 cooperate to firmly fix the drainage tube 1 on the chest wall 25, thereby preventing the drainage tube 1 from sinking in or falling out;

[0051] A dressing layer 13 is provided between the fixing buckle 6 and the outer surface of the chest wall 25 ; the dressing layer 13 can cover the skin around the opening of the drainage tube 1 to achieve hemostatic and antibacterial effects.

[0052] See also Figure 5 and Figure 6 The fixing buckle 6 includes a fixing sleeve 61 and an annular pad 62 integrally formed on the fixing sleeve 61, and the annular pad 62 is lined with a dressing; both the fixing sleeve 61 and the annular pad 62 are provided with openings, and a locking buckle 63 is provided on the side wall of the fixing sleeve 61; the fixing sleeve 61 and the annular pad 62 in this embodiment have a certain deformation ability while ensuring support, and can be made of PP, PE, HDPE and other materials; the fixing sleeve 61 and the annular pad 62 can be deformed by applying external force to increase the width of their openings, so as to facilitate the fixing The sleeve 61 and the annular pad 62 are sleeved onto the drainage tube 1 through the opening; alternatively, with a slight external force applied, the fixed sleeve 61 and the annular pad 62 can be directly sleeved onto the drainage tube 1 from the tail end of the drainage tube 1, and then the opening on the fixed sleeve 61 is locked by the locking buckle 63 to reduce the width of the opening, thereby pressing the fixed sleeve 61 against the drainage tube 1, fixing the fixed sleeve 61 and the annular pad 62 to the drainage tube 1, and preventing the drainage tube 1 from sinking inward; wherein the locking buckle 63 is integrally formed with a clamping block, and the side wall of the fixed sleeve 61 is provided with a clamping groove that is clamped and fixed to the clamping block;

[0053] In the absence of a defect in the chest wall 25, the chest wall 25 is punctured by the puncture cone 2 to insert the drainage tube 1 into the chest cavity, wherein the uninflated air bag 4 enters the chest cavity together with the drainage tube 1, so that the drainage tube can be quickly inserted; after the air bag 4 is inflated, the air bag 4 abuts against the inner wall of the chest wall 25 to prevent the drainage tube 1 from falling out to the outside of the chest wall 25, and the fixing buckle 6 abuts against the outer wall of the chest wall 25 to prevent the drainage tube 1 from sinking into the inside of the chest wall 25, so that the drainage tube 1 can be quickly and firmly fixed on the chest wall 25, thereby preventing the drainage tube 1 from sinking in or falling out; the dressing layer 13 can cover the skin around the opening of the drainage tube 1 to play a hemostatic and antibacterial role.

[0054] Example 2

[0055] See also Figure 7 The inflatable bag 4 in this embodiment is a dumbbell-shaped structured bag; the inflatable bag 4 includes a filling portion 41 and an inner abutting portion 42 and an outer abutting portion 43 respectively provided on both sides of the filling portion 41; the diameters of the inner abutting portion 42 and the outer abutting portion 43 are both larger than the diameter of the filling portion 41; the filling portion 41 fills the defect in the chest wall 25; the inner abutting portion 42 abuts the inner wall of the chest wall 25, and the outer abutting portion 43 abuts the outer wall of the chest wall 25; the fixing buckle 6 is sleeved on the drainage tube 1 and abuts the outer abutting portion 43;

[0056] In the case of a defect in the chest wall 25, the drainage tube 1 is inserted into the chest cavity through the defect in the chest wall under the guidance of the puncture cone 2. The uninflated inflatable bag 4 is located at the defect in the chest wall 25. The inflatable bag 4 is inflated, wherein the filling portion 41 is used to temporarily fill the defect in the chest wall 25. This enables the patient with a defect in the chest wall 25 to simultaneously achieve closed chest drainage while closing the defect wound. The inflatable bag can compress the wound edge of the defect in the chest wall 25 to achieve a hemostatic effect.

[0057] The inner abutting portion 42 and the outer abutting portion 43 are used to abut against the inner and outer side walls of the chest wall 25 and firmly fix the drainage tube 1 by cooperating with the fixing buckle 6, thereby preventing the drainage tube 1 from sinking in or falling out.

[0058] Example 3

[0059] See also Figure 8 The present invention also provides a closed chest drainage system, including the above-mentioned drain device, connecting tube 17 and drainage bag 19. After the puncture cone 2 punctures the chest wall 25 and the drainage tube 1 is inserted into the chest cavity together, the puncture cone 2 is pulled out from the drainage tube 1, and the connecting tube 17 is connected to the drainage tube 1 from which the puncture cone 2 is pulled out through a two-way joint 18; the connecting tube 17 and the drainage bag 19 are connected by a one-way valve 26, which can prevent the blood and gas in the connecting tube 17 and the drainage bag 19 from flowing back; an exhaust valve 27 is provided on the drainage bag 19, and the exhaust valve 27 is used to discharge the gas in the drainage bag 19; a drain valve 23 is provided at the bottom of the drainage bag 19, and the drain valve 23 is used to discharge the liquid collected in the drainage bag 19 when it is opened; the soft drainage bag 19 replaces the traditional chest bottle, which greatly reduces the total volume of the device.

[0060] If necessary, a three-way connector can be connected to the tail end of the connecting tube 17, one end of the three-way connector is connected to the drainage bag 19, and the other end is connected to the chest pressure monitoring device, which is convenient for dynamic observation of the drainage effect and changes in the patient's condition.

[0061] Brief description of the usage process:

[0062] 1. If there is no chest wall 25 defect: During surgery, first disinfect the drape and administer local anesthesia. Using a short-handled scalpel, make an approximately 0.8 cm incision at the catheter insertion site. Insert the puncture cone 2 into the drainage tube 1 and puncture the chest wall 25 along the upper edge of the next rib. When a sense of emptying is felt or gas or fluid is seen discharging from the drainage channel, pull the tail end of the puncture cone 2 and advance the drainage tube 1 further into the chest cavity until the inflatable balloon 4 is completely inserted. Then remove the puncture cone 2, completing the placement of the drainage tube 1.

[0063] After the puncture cone 2 is pulled out, the drainage bag 19 is immediately connected to the tail end of the drainage tube 1 through the connecting tube 17 and the two-way connector 18 (if necessary, a liquid-stop clamp can be used to clamp the drainage tube 1 when the puncture cone 2 is pulled out to prevent liquid from flowing out), and then the inflatable bag 4 is inflated and the drainage tube 1 is pulled outward with a little force so that the inflatable bag 4 abuts the inner wall of the chest wall 25 to prevent the drainage tube 1 from falling out of the chest wall 25. At this time, the position of the fixing buckle 6 is adjusted until the fixing buckle 6 abuts the outer wall of the chest wall 25. Locking the fixing buckle 6 can prevent the drainage tube 1 from sinking into the inside of the chest wall 25.

[0064] 2. In the case of a defect in the chest wall 25: during the operation, the drape is first disinfected and local anesthesia is performed, the puncture cone 2 is inserted into the drainage tube 1, and under the guidance of the puncture cone 2, the drainage tube 1 is inserted into the chest cavity through the defect in the chest wall 25; the tail end of the puncture cone 2 is pulled, the puncture cone 2 is removed, and the drainage tube 1 is clamped with a liquid stop clamp to prevent the discharge of gas or liquid in the chest cavity; then the uninflated dumbbell-shaped airbag 4 is adjusted and placed at the defect in the chest wall 25, and the dumbbell-shaped airbag 4 is inflated. The filling part 41 in the dumbbell-shaped airbag 4 is used to fill the defect in the chest wall 25, so that the patient with a defect in the chest wall 25 can achieve closed chest drainage simultaneously on the basis of closing the chest wall defect; the two ends of the dumbbell-shaped airbag 4 form protrusions on the inner and outer sides of the chest wall 25 (the protrusions are the inner abutment part 42 and the outer abutment part 43), further closing the defect in the chest wall 25 and preliminarily fixing the drainage tube 1;

[0065] After the airbag is inflated, immediately connect the drainage bag 19 to the tail end of the drainage tube 1 through the connecting tube 17 and the two-way connector 18, open the liquid stop clamp on the drainage tube 1, and then adjust the position of the fixing buckle 6 until the fixing buckle 6 abuts the outer abutment part 43, lock the fixing buckle 6, and if necessary, use an external film to further fix the fixing buckle 6 to the surrounding skin, which can further prevent the drainage tube 1 and the inflation bag 4 from sinking into the inside of the chest wall 25 or falling out to the outside.

[0066] In summary, in the present invention, when the chest wall 25 is intact, the inflatable bag 4 and the fixing buckle 6 are designed to quickly and firmly secure the drainage tube 1, preventing the drainage tube 1 from sinking or falling out. In the case of a defect in the chest wall 25, the dumbbell-shaped bag is used to temporarily fill the defect in the chest wall 25, allowing patients with a defect in the chest wall 25 to simultaneously perform closed chest drainage while sealing the defect wound. Furthermore, the bag can compress the wound edge of the chest wall 25 to achieve a hemostatic effect. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A closed chest drainage device, characterized in that: It comprises a drainage tube (1) and a puncture cone (2) installed in the drainage tube (1) in a plug-and-pull manner; the tip of the puncture cone (2) extends from an opening at one end of the drainage tube (1); a guide groove (3) is axially provided on the side wall of the puncture cone (2); An air bag (4) is provided on the outer wall of the drainage tube (1) near the tip of the puncture cone (2), an air tube (5) connected to the air bag (4) is axially fixed on the side wall of the drainage tube (1), and an air valve is provided at the tail end of the air tube (5); A fixing buckle (6) is detachably fixed on the drainage tube (1) near the tail end of the puncture cone (2).

2. The closed chest drainage device according to claim 1, characterized in that: An auxiliary drainage hole (7) is provided on the side wall of the drainage tube (1) close to the pointed end of the puncture cone (2).

3. The closed chest drainage device according to claim 1, characterized in that: A conical closing tube (8) is integrally formed at the end of the drainage tube (1) close to the tip of the puncture cone (2).

4. The closed chest drainage device according to claim 1, characterized in that: The fixing buckle (6) comprises a fixing sleeve (61) and an annular pad (62) integrally formed on the fixing sleeve (61); both the fixing sleeve (61) and the annular pad (62) are provided with openings, and a locking buckle (63) is provided on the side wall of the fixing sleeve (61).

5. The closed chest drainage device according to claim 1, characterized in that: A handle (12) is integrally formed at the tail end of the puncture cone (2), and the diameter of the handle (12) is larger than the outer diameter of the drainage tube (1).

6. The closed chest drainage device according to any one of claims 1 to 5, characterized in that: The inflatable bag (4) abuts against the inner wall of the chest wall (25), and the fixing buckle (6) abuts against the outer wall of the chest wall (25); a dressing layer (13) is padded between the fixing buckle (6) and the outer wall of the chest wall (25).

7. The closed chest drainage device according to any one of claims 1 to 5, characterized in that: The inflatable bag (4) comprises a filling portion (41) and an inner abutting portion (42) and an outer abutting portion (43) respectively arranged on both sides of the filling portion (41); the diameters of the inner abutting portion (42) and the outer abutting portion (43) are both larger than the diameter of the filling portion (41); the filling portion (41) fills the defective chest wall (25); the inner abutting portion (42) abuts against the inner wall of the chest wall (25), and the outer abutting portion (43) abuts against the outer wall of the chest wall (25); The fixing buckle (6) abuts against the outer abutment portion (43).

8. A closed chest drainage system, characterized by: The drainage device according to claim 6 or 7 further comprises a connecting tube (17) connected to the drainage tube (1) after the puncture cone (2) is withdrawn, and a drainage bag (19) connected to the connecting tube (17), wherein the connecting tube (17) and the drainage bag (19) are connected via a one-way valve (26); An exhaust valve (27) is provided above the drainage bag (19); A drain valve (23) is provided at the bottom of the drainage bag (19).

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