Chest drainage device

Abstract

The invention relates to the technical field of medical instruments, in particular to a chest drainage device which comprises a drainage bottle, a drainage tube and a negative pressure mechanism, one end of the drainage tube is inserted into the drainage bottle, the other end of the drainage tube is inserted into the chest of a patient, and the negative pressure mechanism is communicated with an inner cavity of the drainage bottle. The negative pressure mechanism is driven by autonomous respiration of a patient to generate negative pressure suction force on the drainage bottle. According to the scheme, the physiological activity of the human body is converted into negative pressure power through ingenious mechanical conversion, negative pressure equipment, power supply and negative pressure generation through manual pressing of special personnel are not needed, the device can be widely applied to assisting in chest drainage in special environments such as emergency rescue and disasters lacking medical resources, and medical and human resource pressure is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a chest drainage device. Background Art

[0002] Closed chest drainage is a conventional treatment for pneumothorax. This involves inserting one end of a drainage tube into the chest cavity and connecting the other end to a drainage bottle positioned lower than the tube to drain air or collect fluid. It is widely used as a treatment for hemothorax, pneumothorax, and empyema, as well as after thoracotomy, and plays a crucial role in the treatment of these diseases. During the drainage process, maintaining constant negative pressure within the drainage bottle helps drain fluid or air from the chest cavity, allowing the lungs to re-expand more quickly. However, in emergencies, disaster situations, or hospitals with poor medical facilities, where negative pressure equipment is lacking or in short supply, urgent chest drainage can only be performed by manually pressing a hand pressure bulb to continuously generate negative pressure for suction. This requires additional personnel to continuously operate the hand pressure bulb to generate negative pressure, placing significant strain on medical and human resources. Summary of the Invention

[0003] The object of the present invention is to provide a chest drainage device to solve the problem in the prior art that frequent water replacement is required, resulting in a large nursing workload.

[0004] To achieve the above object, the basic scheme of the present invention is as follows:

[0005] A chest drainage device includes a drainage bottle, a drainage tube and a negative pressure mechanism. One end of the drainage tube is inserted into the drainage bottle, and the other end of the drainage tube is inserted into the patient's chest cavity. The negative pressure mechanism is connected to the inner cavity of the drainage bottle. Driven by the patient's spontaneous breathing, the negative pressure mechanism generates negative pressure suction on the drainage bottle.

[0006] In the above basic scheme, the patient can automatically generate negative pressure through the negative pressure mechanism whether in a conscious or unconscious state to produce negative pressure suction on the drainage bottle for continuous negative pressure drainage. There is no need for medical staff to manually press continuously to generate negative pressure or use special negative pressure equipment to generate negative pressure, saving medical and human resources.

[0007] Furthermore, the negative pressure mechanism includes an abdominal belt and a negative pressure generating part provided on the abdominal belt, and the ups and downs of the patient's abdomen drive the negative pressure generating part to generate negative pressure suction on the drainage bottle.

[0008] Furthermore, the negative pressure mechanism also includes a check part for preventing external gas from entering the patient's chest cavity through the drainage tube. One end of the check part is connected to the negative pressure generating part, and the other end of the check part is connected to the inner cavity of the drainage bottle.

[0009] Furthermore, the non-return part includes an outer cylinder, a screw, a slide, a spring and a cone block arranged in sequence along the axis of the outer cylinder, the slide is sealed and slidably connected to the inner wall of the outer cylinder, one end of the screw is located in the outer cylinder and is rotatably connected to the slide, the other end of the screw extends out of the outer cylinder and is threadedly connected to the bottom plate of the outer cylinder, the inner wall of the outer cylinder away from the screw is provided with a tapered hole matched with the cone block, the small end of the tapered hole is communicated with the upper inner cavity of the drainage bottle, one end of the spring is fixedly connected to the slide, the other end of the spring is fixedly connected to the cone block, and the negative pressure generating part and the negative pressure regulating part are both communicated with the inner cavity of the outer cylinder.

[0010] Furthermore, the negative pressure mechanism also includes a negative pressure regulating part for enabling the negative pressure generating part to generate a constant negative pressure on the drainage bottle, one end of the negative pressure regulating part is connected to the inner cavity of the check part, and the other end of the negative pressure regulating part is connected to the external space of the negative pressure regulating part.

[0011] Furthermore, the negative pressure regulating part includes an outer cylinder 2, a screw 2, a slide 2, a spring 2 and a cone block 2 arranged in sequence along the axis of the outer cylinder 2, the slide 2 is sealed and slidably connected to the inner wall of the outer cylinder 2, one end of the screw 2 is located in the outer cylinder 2 and is rotatably connected to the slide 2, the other end of the screw 2 extends out of the outer cylinder 2 and is threadedly connected to the bottom plate of the outer cylinder 2, the inner wall of the outer cylinder 2 away from the screw 2 is set to a tapered hole 2 that cooperates with the cone block 2, the small end of the tapered hole 2 is connected to the external space of the outer cylinder 2, one end of the spring 2 is fixedly connected to the slide 2, the other end of the spring 2 is fixedly connected to the cone block 2, and the inner cavity of the outer cylinder 2 is connected to the inner cavity of the outer cylinder 1.

[0012] Furthermore, the abdominal belt includes a first belt segment and a second belt segment, the first belt segment and the second belt segment are connected by an elastic belt, and the negative pressure generating part includes two negative pressure units symmetrically arranged on both sides of the elastic belt, the negative pressure units on both sides of the elastic belt are fixedly connected to the first belt segment and the second belt segment respectively, and the two negative pressure units are movably connected by a connecting rope.

[0013] Furthermore, the negative pressure unit includes an outer tube three fixedly connected to the first band segment or the second band segment, a sliding column arranged in the outer tube three and sealingly slidingly connected to the inner wall of the outer tube three, and a return spring with one end fixedly connected to the sliding column and the other end fixedly connected to the inner bottom wall of the outer tube three. The outer tube three is arranged along the length direction of the abdominal binder, and a one-way valve one and a one-way valve two are provided on the outer tube three, which are connected to the inner cavity of the outer tube three away from the elastic band. The one-way valve one is connected to the inner cavity of the outer tube one through the pipeline one and only allows gas to enter the inner cavity of the outer tube three through the pipeline one. The one-way valve two only allows gas to flow from the inner cavity of the outer tube three through the one-way valve two to the external space of the outer tube three. The connecting rope is arranged along the length direction of the abdominal binder, and the two ends of the connecting rope respectively extend into the outer tube three and are fixedly connected to the corresponding sliding column.

[0014] Furthermore, a drain valve is provided on the lower side wall of the drainage bottle.

[0015] Furthermore, the drainage bottle is made of a transparent material, and scale lines are provided on the side wall of the drainage bottle.

[0016] In the above scheme, after the drainage tube is correctly inserted into the patient's chest cavity, the drainage bottle is placed at a position lower than the patient's chest and abdomen, the abdominal belt is correctly tied to the patient's waist and abdomen, and the binding force is adjusted to an appropriate degree by Velcro. When the patient breathes to expand the abdomen, the elastic belt is stretched, and the distance between the outer tubes three on both sides of the elastic belt increases. Under the pulling of the connecting rope, the sliding columns on both sides of the elastic belt slide in the corresponding outer tube three toward the elastic belt, so that negative pressure is formed in the inner cavity of the outer tube three away from the elastic belt. Then, negative pressure is also formed in the inner cavity of the outer tube one that is connected to the inner cavity of the outer tube three. This negative pressure The pressure is lower than the external atmospheric pressure, so that the gas in the patient's chest cavity can easily push cone block 1 into the inner cavity of outer tube 1 and finally enter the inner cavity of outer tube 3 through pipe 1, thereby accelerating the discharge rate of the patient's chest cavity gas. When the patient exhales and causes the abdomen to contract, the distance between the two outer tubes 3 decreases, and under the elastic force of their respective return springs, the slide slides toward the end away from the elastic band. At this time, the one-way valve 1 is closed and the one-way valve 2 is opened, and the gas in outer tube 3 is discharged outward through the one-way valve 2. As the patient continues to breathe, the slide slides back and forth in outer tube 3 to generate negative pressure in the inner cavity of outer tube 1 to assist in the discharge of the patient's chest cavity gas.

[0017] In this solution, the elastic force of spring one can be adjusted by rotating screw one, thereby adjusting the resistance of cone block one to the chest gas, so that the resistance of cone block one to the discharge of chest gas meets the pressure range stipulated by relevant medical regulations. Cone block one also ensures that the air outside the drainage bottle cannot enter the drainage bottle, and will not return to the patient's chest cavity through the drainage tube.

[0018] When the patient inhales, the abdomen expands and the negative pressure generated in the inner cavity of outer tube one is too large, and cone block two overcomes spring two and moves upward to allow external gas to pass through outer tube two and then through pipe two into the inner cavity of outer tube one to reduce the negative pressure in the inner cavity of outer tube one and prevent excessive adsorption force on the patient's chest cavity. Similarly, the elastic force of spring two on cone block two can be adjusted by rotating screw two, thereby achieving the effect of adjusting the maximum negative pressure in the inner cavity of outer tube one.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. This solution converts the body's own physiological activities into negative pressure power through clever mechanical conversion. It does not require negative pressure equipment, power supply, or manual pressure from specialized personnel to generate negative pressure. It can be widely used in special environments such as emergency rescue and disasters where there is a lack of medical resources, reducing the pressure on medical and human resources.

[0021] 2. This solution does not require the use of clean water to seal the drainage tube, and does not require the replacement of the water body. It is more suitable for use in special environments such as rescue and disasters where there is a lack of medical resources, and can effectively reduce the workload of medical staff.

[0022] 3. In this solution, external air does not enter the inner cavity of the drainage bottle, thereby ensuring that external air does not enter the chest cavity, which will not cause the risk of open pneumothorax. This solution accelerates the discharge of gas in the drainage bottle and has a negative pressure regulation function without causing the risk of over-inhalation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0024] In the attached figure:

[0025] Figure 1 The figure is a schematic structural diagram of a chest drainage device of the present invention.

[0026] Figure 2 Schematic diagram of the structure of the drainage bottle.

[0027] Figure 3 Schematic diagram of the structure of the anti-return part and the negative pressure regulation part.

[0028] Figure 4 This is a schematic diagram of the coordination between the abdominal belt and the negative pressure generating part.

[0029] Figure 5 for Figure 4 Enlarged view of part A in the middle.

[0030] The meanings of the reference numerals in the accompanying drawings are:

[0031] Drainage bottle-10; Drainage tube-101;

[0032] Abdominal band-21; first band section-211; second band section-212; elastic band-213; Velcro-214;

[0033] Negative pressure generating unit 22; negative pressure unit 221; outer cylinder 3 2211; sliding column 2212; return spring 2213; one-way valve 1 2214; one-way valve 2 2215;

[0034] Check member 23; outer cylinder 231; screw 232; slide plate 233; spring 234; cone block 235; cone hole 236; pipe 237;

[0035] Negative pressure regulating unit 24; outer cylinder 241; screw 242; slide 243; spring 244; cone block 245; cone hole 246; pipe 3 247;

[0036] Connecting rope - 30;

[0037] Pipeline One-40;

[0038] Drain valve-50. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] A chest drainage device of this embodiment, such as Figure 1-Figure 5 As shown, it includes a drainage bottle 10, a drainage tube 101 and a negative pressure mechanism. One end of the drainage tube 101 is inserted into the drainage bottle 10, and the other end of the drainage tube 101 is inserted into the patient's chest cavity. The negative pressure mechanism is connected to the inner cavity of the drainage bottle 10. The negative pressure mechanism generates negative pressure suction on the drainage bottle 10 under the patient's spontaneous breathing drive.

[0042] The drainage bottle 10 is made of a transparent material, preferably transparent acrylic. The side wall of the drainage bottle 10 is provided with a scale line for conveniently reading the amount of liquid in the drainage bottle 10. The lower side wall of the drainage bottle 10 is provided with a drain valve 50 for conveniently discharging the liquid in the drainage bottle 10. One end of the drainage tube 101 is located in the upper inner cavity of the drainage bottle 10.

[0043] The negative pressure mechanism includes an abdominal belt 21, a negative pressure generating unit 22 provided on the abdominal belt 21, a check portion 23 for preventing external gas from entering the patient's chest cavity through the drainage tube 101, and a negative pressure regulating unit 24 for enabling the negative pressure generating unit 22 to generate a constant negative pressure on the drainage bottle 10.

[0044] Combine Figure 4 As shown, the abdominal belt 21 includes a first belt segment 211 and a second belt segment 212, and the first belt segment 211 and the second belt segment 212 are connected by an elastic belt 213. The first belt segment 211 and the second belt segment 212 are both inelastic flexible belts, and the first belt segment 211 and the second belt segment 212 are respectively provided with Velcro 214 at one end away from the elastic belt 213, which makes it convenient to wrap the abdominal belt 21 around the patient's waist and abdomen and bind it to the patient's waist and abdomen.

[0045] Combine Figure 5As shown, the negative pressure generating part 22 includes two negative pressure units 221 symmetrically arranged on both sides of the elastic band 213, one negative pressure unit 221 is arranged on one side of the elastic band 213 and connected to the first band segment 211, and the other negative pressure unit 221 is arranged on the other side of the elastic band 213 and connected to the second band segment 212, and the two negative pressure units 221 are movably connected through a connecting rope 30. Specifically, the negative pressure unit 221 includes an outer cylinder three 2211 fixedly connected to the first band segment 211 or the second band segment 212, a sliding column 2212 arranged in the outer cylinder three 2211 and sealingly slidingly connected to the inner wall of the outer cylinder three 2211, and a return spring 2213 with one end fixedly connected to the sliding column 2212 and the other end fixedly connected to the inner bottom wall of the outer cylinder three 2211. The outer cylinder three 2211 is moved along the bundle The abdominal band 21 is arranged in the length direction, and the outer tube three 2211 is provided with a one-way valve one 2214 and a one-way valve two 2215 which are connected to the inner cavity of the outer tube three 2211 away from the elastic band 213. The one-way valve one 2214 is connected to the check part 23 through the pipe one 40 and only allows gas to enter the inner cavity of the outer tube three 2211 from the pipe one 40. The one-way valve two 2215 only allows gas to flow from the inner cavity of the outer tube three 2211 through the one-way valve two 2215 to the external space of the outer tube three 2211. The connecting rope 30 is arranged along the length direction of the abdominal band 21, and the two ends of the connecting rope 30 are respectively extended into the outer tube three 2211 and fixedly connected with the corresponding sliding column 2212. The ends of the two outer tube threes 2211 close to each other are provided with a through hole for the passage of the connecting rope 30, and the inner diameter of the through hole is larger than the outer diameter of the connecting rope 30.

[0046] The anti-return part 23 is arranged at the top of the drainage bottle 10. The anti-return part 23 includes a vertically arranged outer cylinder 231, a screw 232, a slide plate 233, a spring 234 and a cone block 235 coaxially arranged from top to bottom along the axis of the outer cylinder 231. The outer cylinder 231 is a circular cylinder with closed ends. In order to facilitate the installation of components in the outer cylinder 231, the upper bottom plate of the outer cylinder 231 is set as an independent component. The upper bottom plate of the outer cylinder 231 can be fixedly connected to the barrel of the outer cylinder 231 by screws to close the upper end of the outer cylinder 231. The outer cylinder 231 is arranged on the upper surface of the drainage bottle 10 and is fixedly connected to the drainage bottle 10. The slide plate 233 is sealed and slidably connected to the inner wall of the outer cylinder 231. The lower end of the screw 232 is located in the outer cylinder 231, and the lower end of the screw 232 is pushed by a two-way thrust. The bearing is rotatably connected to the slide plate 233, the upper end of the screw rod 232 extends out of the outer cylinder 231, and the upper base plate of the outer cylinder 231 is provided with a threaded through hole that cooperates with the external thread on the screw rod 232, and the screw rod 232 is threadedly connected to the upper base plate of the outer cylinder 231, the lower end of the cone block 235 is a small end, and the inner wall of the outer cylinder 231 away from the screw rod 232 is provided with a cone hole 236 that cooperates with the cone block 235, and the small end of the cone hole 236 is sealed and connected to the upper inner cavity of the drainage bottle 10 through the pipe 237, the upper end of the spring 234 is fixedly connected to the slide plate 233, and the lower end of the spring 234 is fixedly connected to the cone block 235, and the inner cavity of the outer cylinder 231 located above the cone block 235 is connected to the one-way valve 2214 through the pipe 40.

[0047] The negative pressure regulating part 24 is arranged at the top of the drainage bottle 10. The negative pressure regulating part 24 includes a vertically arranged outer cylinder 241, a screw 242, a slide 243, a spring 244 and a cone block 245 coaxially arranged from top to bottom along the axis of the outer cylinder 241. The outer cylinder 241 is a circular cylinder with closed ends. In order to facilitate the installation of components in the outer cylinder 241, the upper base plate of the outer cylinder 241 is set as an independent component. The upper base plate of the outer cylinder 241 can be fixedly connected to the barrel of the outer cylinder 241 by screws to close the upper end of the outer cylinder 241. The outer cylinder 241 is arranged on the upper surface of the drainage bottle 10 and is fixedly connected to the drainage bottle 10. The slide 243 is sealed and slidably connected to the inner wall of the outer cylinder 241. The lower end of the screw 242 is located in the outer cylinder 241. The screw 2 The lower end of 242 is rotatably connected to the second slide plate 243 through a bidirectional thrust bearing, and the upper end of the second screw 242 extends out of the second outer cylinder 241. The upper base plate of the second outer cylinder 241 is provided with a threaded through hole that cooperates with the external thread on the second screw 242. The second screw 242 is threadedly connected to the upper base plate of the second outer cylinder 241. The lower end of the second cone block 245 is a small end. The inner wall of the second outer cylinder 241 away from the second screw 242 is provided with a second cone hole 246 that cooperates with the second cone block 245. The small end of the second cone hole 246 is communicated with the external space of the second outer cylinder 241. The upper end of the second spring 244 is fixedly connected to the second slide plate 243, and the lower end of the second spring 244 is fixedly connected to the second cone block 245. The inner cavity of the second outer cylinder 241 is communicated with the inner cavity of the outer cylinder 1 231 through the pipe 3 247.

[0048] In the above scheme, when chest drainage is required for the patient, after the drainage tube 101 is correctly implanted in the patient's chest cavity, the drainage bottle 10 is placed at a position lower than the patient's chest and abdomen, the abdominal belt 21 is correctly tied to the patient's waist and abdomen, and the binding force is adjusted to an appropriate degree by the Velcro 214. When the patient breathes and the abdomen expands, the elastic belt 213 is stretched, and the distance between the outer tube three 2211 on both sides of the elastic belt 213 increases. Under the pulling of the connecting rope 30, the sliding columns 2212 on both sides of the elastic belt 213 slide in the corresponding outer tube three 2211 toward the elastic belt 213, so that negative pressure is formed in the inner cavity of the outer tube three 2211 away from the elastic belt 213, and then the inner cavity of the outer tube one 231 connected with the inner cavity of the outer tube three 2211 by the inlet pipe one 40 is also formed. Negative pressure, which is less than the external atmospheric pressure, allows the gas in the patient's chest cavity to easily push the cone block 235 into the inner cavity of the outer tube 1 231 and finally into the inner cavity of the outer tube 3 2211 through the pipe 1 40, thereby accelerating the discharge rate of the patient's chest cavity gas. When the patient exhales and causes the abdomen to contract, the distance between the two outer tubes 3 2211 decreases, and under the elastic force of their respective return springs 2213, the sliding column 2212 slides toward the end away from the elastic band 213. At this time, the one-way valve 1 2214 is closed and the one-way valve 2 2215 is opened, and the gas in the outer tube 3 2211 is discharged outward through the one-way valve 2 2215. As the patient continues to breathe, the sliding column 2212 keeps sliding back and forth in the outer tube 3 2211 to generate negative pressure in the inner cavity of the outer tube 1 231 to assist in the discharge of the patient's chest cavity gas.

[0049] In this solution, the elastic force of spring 1234 can be adjusted by rotating screw 1232, thereby adjusting the resistance of cone block 1235 to the gas from the chest cavity, so that the resistance of cone block 1235 to the discharge of gas from the chest cavity meets the pressure range stipulated by relevant medical regulations. Cone block 1235 also ensures that the air outside the drainage bottle 10 cannot enter the drainage bottle 10, and will not return to the patient's chest cavity through the drainage tube 101.

[0050] The elastic force of spring 244 is adjusted and set so that the elastic force of spring 244 is smaller than the elastic force of spring 1 234, and when the patient inhales and the abdomen expands, the negative pressure generated in the inner cavity of outer tube 1 231 is too large, cone block 245 overcomes spring 244 and moves upward, allowing external gas to pass through outer tube 2 241 and then through pipe 2 237 into the inner cavity of outer tube 1 231, thereby reducing the negative pressure in the inner cavity of outer tube 1 231 and preventing excessive adsorption force on the patient's chest cavity. Similarly, the elastic force of spring 244 on cone block 245 can be adjusted by rotating screw 242, thereby achieving the effect of adjusting the maximum negative pressure in the inner cavity of outer tube 1 231.

[0051] The above are only embodiments of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A chest drainage device, comprising a drainage bottle (10), a drainage tube (101) and a negative pressure mechanism, wherein one end of the drainage tube (101) is inserted into the drainage bottle (10), and the other end of the drainage tube (101) is inserted into the chest cavity of a patient, and the negative pressure mechanism is communicated with the inner cavity of the drainage bottle (10), characterized in that: The negative pressure mechanism generates negative pressure suction on the drainage bottle (10) under the drive of the patient's spontaneous breathing.

2. A chest drainage device according to claim 1, characterized in that: The negative pressure mechanism comprises an abdominal belt (21) and a negative pressure generating portion (22) arranged on the abdominal belt (21); the rise and fall of the patient's abdomen drives the negative pressure generating portion (22) to generate negative pressure suction on the drainage bottle (10).

3. A chest drainage device according to claim 2, characterized in that: The negative pressure mechanism further includes a non-return portion (23) for preventing gas outside the patient's chest cavity from entering the patient's chest cavity through the drainage tube (101); one end of the non-return portion (23) is connected to the negative pressure generating portion (22), and the other end of the non-return portion (23) is connected to the inner cavity of the drainage bottle (10).

4. A chest drainage device according to claim 3, characterized in that: The anti-return portion (23) includes an outer cylinder (231), a screw (232), a slide plate (233), a spring (234) and a spring (235) arranged in sequence along the axis of the outer cylinder (231), the slide plate (233) is sealingly and slidingly connected to the inner wall of the outer cylinder (231), one end of the screw (232) is located in the outer cylinder (231) and is rotatably connected to the slide plate (233), and the other end of the screw (232) extends out of the outer cylinder (231) and is connected to the bottom of the outer cylinder (231). The plate is threadedly connected, the inner wall of the outer cylinder (231) away from the screw (232) is set as a tapered hole (236) that cooperates with the spring (235), the small end of the tapered hole (236) is connected to the upper inner cavity of the drainage bottle (10), one end of the spring (234) is fixedly connected to the slide (233), and the other end of the spring (234) is fixedly connected to the spring (235), and the negative pressure generating part (22) and the negative pressure regulating part (24) are both connected to the inner cavity of the outer cylinder (231).

5. A chest drainage device according to claim 4, characterized in that: The negative pressure mechanism further includes a negative pressure regulating portion (24) for causing the negative pressure generating portion (22) to generate a constant negative pressure on the drainage bottle (10); one end of the negative pressure regulating portion (24) is communicated with the inner cavity of the check portion (23), and the other end of the negative pressure regulating portion (24) is communicated with the external space of the negative pressure regulating portion (24).

6. A chest drainage device according to claim 5, characterized in that: The negative pressure regulating part (24) comprises an outer cylinder (241), a screw (242) (243) (244) (245) (246) (247) (248) (249) (250) (251) (252) (253) (254) (255) (256) (257) (258) (259) (260) (261) (262) (263) (264) (265) (266) (267) (268) (269) (270) (271) (272) (273) (274) (275) (276) (277) (278) (279) (279) (271) (271) (272) (277) (278) (279) (271) (272) (273) (275) (276) (277) (278) (279) (279) (271) (271) (272) (273) (279) (275) (276) (277) (278) (279 ... The bottom plate of the outer cylinder (241) is threadedly connected, the inner wall of the outer cylinder (241) away from the screw (242) is set as the tapered hole (246) matched with the tapered block (245), the small end of the tapered hole (246) is connected to the external space of the outer cylinder (241), one end of the spring (244) is fixedly connected to the slide (243), the other end of the spring (244) is fixedly connected to the tapered block (245), and the inner cavity of the outer cylinder (241) is connected to the inner cavity of the outer cylinder (231).

7. A chest drainage device according to claim 6, characterized in that: The abdominal band (21) includes a first band segment (211) and a first band segment (212), wherein the first band segment (211) and the first band segment (212) are connected via an elastic band (213), and the negative pressure generating portion (222) includes two negative pressure units (221) symmetrically arranged on both sides of the elastic band (213), wherein the negative pressure units (221) on both sides of the elastic band (213) are fixedly connected to the first band segment (211) and the first band segment (212), respectively, and the two negative pressure units (221) are movably connected via a connecting rope (30).

8. The chest drainage device according to claim 7, characterized in that: The negative pressure unit (221) comprises an outer tube three (2211) fixedly connected to the first band segment (211) or the first band segment (212), a sliding post (2212) arranged in the outer tube three (2211) and sealingly slidingly connected to the inner wall of the outer tube three (2211), and a return spring (2213) fixedly connected to the sliding post (2212) at one end and fixedly connected to the inner bottom wall of the outer tube three (2211) at the other end. The outer tube three (2211) is arranged along the length direction of the abdominal band (21), and the outer tube three (2211) is provided with a spring connected to the inner cavity of the end of the outer tube three (2211) away from the elastic band (213). The one-way valve 1 (2214) and the one-way valve 2 (2215) are connected, the one-way valve 1 (2214) is connected with the inner cavity of the outer tube 1 (231) through the pipeline 1 (40) and only allows gas to enter the inner cavity of the outer tube 3 (2211) from the pipeline 1 (40), and the one-way valve 2 (2215) only allows gas to flow from the inner cavity of the outer tube 3 (2211) through the one-way valve 2 (2215) to the external space of the outer tube 3 (2211), the connecting rope (30) is arranged along the length direction of the abdominal belt (21), and the two ends of the connecting rope (30) are respectively extended into the outer tube 3 (2211) and fixedly connected with the corresponding sliding column (2212).

9. The chest drainage device according to claim 1, characterized in that: A drain valve (50) is provided on the lower side wall of the drainage bottle (10).

10. The chest drainage device according to claim 1, characterized in that: The drainage bottle (10) is made of a transparent material, and scale lines are provided on the side wall of the drainage bottle (10).

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