A closed chest drainage device

Abstract

The present invention provides a closed chest drainage device, including a drainage tube and a drainage bottle assembly; the first end of the drainage tube is flexibly connected to an adaptive airbag, which moves down to the accumulation of effusion in the chest cavity under the action of gravity; the interior of the adaptive airbag is also provided with a drainage channel, the drainage channel is provided with a first one-way valve and a second one-way valve, and a pressure difference driven diaphragm and a corresponding chamber are provided on the periphery of the adaptive airbag, the pressure difference driven diaphragm swings back and forth with the change of the internal pressure of the chest cavity, so that the drainage channel forms a negative pressure to introduce the effusion into the drainage channel through the first one-way valve. The present invention can reduce the difficulty of intubation and can completely drain the effusion in the chest cavity.

Description

Technical Field

[0001] The present application relates to the field of medical machinery, and in particular to a closed chest drainage device. Background Art

[0002] Closed thoracic drainage is a basic operation frequently performed by thoracic surgeons. It is mainly based on the physiological characteristics of the pleural cavity. The pleural cavity is connected to the outside world with the help of the liquid in the water seal bottle in the drainage device, and the principle of atmospheric pressure is used to remove the accumulated air and fluid in the thoracic cavity.

[0003] In the prior art, closed chest drainage is mainly performed by gravity of the effusion, which is a passive drainage method and is difficult to completely drain the effusion in the chest cavity. In addition, when intubating, the end of the drainage tube needs to be accurately inserted into the designated position. Therefore, in the prior art, there are technical problems such as high intubation requirements and poor drainage effect. Summary of the invention

[0004] In view of the above problems, the present application provides a closed chest drainage device for solving the technical problems of difficulty in intubation of chest drainage and incomplete drainage of effusion.

[0005] To achieve the above-mentioned purpose, the present application provides a closed thoracic drainage device for draining pleural effusion, the closed thoracic drainage device comprising: a drainage tube and a drainage bottle assembly;

[0006] The drainage tube comprises a first end for inserting into the chest cavity, and a second end for connecting to the drainage bottle assembly; the drainage bottle assembly is used to collect the drained effusion;

[0007] The first end is flexibly connected to an adaptive airbag, and a counterweight is arranged inside the adaptive airbag, so that the adaptive airbag can move downward to the location where the effusion in the thoracic cavity accumulates under the action of gravity;

[0008] The interior of the adaptive airbag is also provided with a drainage channel connected to the first end, the inlet end of the drainage channel is provided with a first one-way valve, the outflow end of the drainage channel is provided with a second one-way valve, and a pressure difference driven diaphragm and a corresponding chamber are provided on the periphery of the adaptive airbag, the chamber is connected to the drainage channel, and the pressure difference driven diaphragm swings back and forth with the change of the internal pressure of the chest cavity, so that the drainage channel forms a negative pressure to introduce the accumulated fluid into the drainage channel through the first one-way valve.

[0009] Further, the pressure difference driven diaphragm comprises: a thickened outer frame, an elastic deformation wrinkle area and an arc-shaped middle diaphragm;

[0010] The thickened outer frame is arranged at the periphery of the elastic deformation folding zone, is formed by the adaptive airbag being thickened along the thickness direction, and forms a stable annular frame after the adaptive airbag is inflated;

[0011] The outer edge of the elastic deformation wrinkle zone is connected to the thickened outer frame, and the inner edge is connected to the middle diaphragm. The elastic deformation wrinkle zone includes more than two annular corrugations. The elastic deformation wrinkle zone is used to elastically deform along the thickness direction as the internal pressure of the chest cavity changes, so as to drive the middle diaphragm to swing back and forth.

[0012] Further, the first end is provided with a flexible silicone connecting tube;

[0013] The diameter of the silicone connecting tube gradually decreases from one end to the other end, and in the middle section of the silicone connecting tube, the tube wall is radially bent inward to form a stacked tube section. The length of the stacked tube section is adaptively adjusted with the position of the adaptive airbag in the chest cavity, so that in different human body postures, the adaptive airbag can adaptively move down to the place where the fluid accumulates in the chest cavity.

[0014] Furthermore, a plurality of grooves are arranged at intervals along the axial direction on the outer surface of the tube wall in the middle section to reduce the stress overcome by the tube wall when bending inwards.

[0015] Furthermore, it also includes an inflation pipe for inflating the adaptive airbag; the inflation pipe is arranged along the axial direction of the drainage tube, one end of the inflation pipe is connected to the adaptive airbag, and the other end extends outside the chest cavity and is provided with an inflation nozzle.

[0016] Furthermore, the second end of the drainage tube is provided with a quick-release joint, and the quick-release joint is connected to the drainage bottle assembly through a quick-release pipe.

[0017] Furthermore, the adaptive airbag is an ellipsoidal airbag, the inlet end is arranged at one end of the ellipsoidal airbag in the length direction; and the counterweight is arranged around the inlet end.

[0018] Furthermore, the drainage bottle assembly includes a collection bottle and a water seal bottle; the water seal bottle is filled with physiological saline;

[0019] The second end is connected to the collecting bottle, and the collecting bottle is connected to the bottom of the water seal bottle through a U-shaped connecting tube.

[0020] Furthermore, a scale is provided on the surface of the drainage tube along the axial direction, and the scale is used to measure the length of the first end inserted into the chest cavity.

[0021] Different from the prior art, the above technical solution is provided with an adaptive airbag at the first end (i.e., the insertion end) of the drainage tube, a drainage channel is provided in the adaptive airbag, the drainage tube and the adaptive airbag are flexibly connected, and a counterweight is provided in the adaptive airbag, so that the adaptive airbag can probe down to the accumulation of fluid in the chest cavity under the action of gravity, thereby effectively solving the technical problem that the intubation depth is difficult to grasp; and the adaptive airbag is provided with a pressure difference-driven diaphragm, and a first one-way valve and a second one-way valve are provided on the drainage channel; through the pressure difference-driven diaphragm, the first one-way valve and the second one-way valve, a periodic pressure difference can be generated on both sides of the pressure difference-driven diaphragm with breathing, and the pressure difference-driven diaphragm can be swung back and forth, so that the fluid in the chest cavity is sucked into the drainage channel and the drainage tube, so as to better drain the fluid in the chest cavity.

[0022] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present invention and other related contents, and shall not be considered as limiting the present application.

[0024] In the drawings of the specification:

[0025] Figure 1 It is a structural schematic diagram of the closed chest drainage device described in the specific implementation method;

[0026] Figure 2 for Figure 1 Sectional view along AA direction;

[0027] Figure 3 It is a schematic diagram of adjusting the length of the silicone connecting tube after the adaptive airbag is lowered in a specific implementation manner;

[0028] Figure 4 for Figure 2 A partial enlarged view of part A;

[0029] The reference numerals in the above drawings are described as follows:

[0030] 1. Drainage tube; 2. Drainage bottle assembly; 11. Adaptive airbag; 12. Pressure difference driven diaphragm; 13. Inflatable pipe; 14. Quick release connector; 15. Quick release pipe; 16. First one-way valve; 17. Second one-way valve; 18. Silicone connecting pipe; 21. Collection bottle; 22. Water seal bottle; 23. U-shaped connecting pipe;

[0031] 110. drainage channel; 111. entrance end;

[0032] 121, thickened outer frame; 122, elastic deformation wrinkle zone; 123, middle diaphragm; 124, chamber;

[0033] 161, valve plate; 162, retaining ring;

[0034] 181. overlapped pipe section; 182. groove; 183. bend. DETAILED DESCRIPTION

[0035] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0036] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0037] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0039] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0040] Without further limitations, in this application, the words "include", "comprises", "has" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0041] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0042] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] See also Figures 1 to 4 , this embodiment provides a closed chest drainage device. The closed chest drainage device is used to be inserted into the chest cavity of a human body to drain pleural effusion. Compared with the technical problems in the prior art that the depth of intubation is difficult to control and the effusion is not completely drained in the chest drainage operation. The closed chest drainage device provided in this embodiment can adaptively adjust the position of the inlet end 111 of the drainage channel 110 of the drainage tube 1 in the chest cavity, thereby reducing the difficulty of controlling the depth of intubation. In addition, the closed chest drainage device of this embodiment is provided with a pressure difference driven diaphragm 12, which can swing back and forth with the change of the internal pressure of the chest cavity, so that the drainage channel 110 forms a negative pressure to introduce the effusion into the drainage channel 110 through the first one-way valve 16, so that the pleural effusion can be better drained.

[0045] like Figure 1 As shown, in this embodiment, the closed chest drainage device comprises: a drainage tube 1 and a drainage bottle assembly 2. The drainage tube 1 is used to drain the pleural effusion, and the drainage bottle assembly 2 is used to collect the drained effusion and isolate the chest cavity from the outside to avoid chest infection.

[0046] The drainage tube 1 includes a first end for inserting into the chest cavity, and a second end for connecting to the drainage bottle assembly 2; that is, the first end is an insertion end for inserting into the chest cavity, and the second end is a lead-out end located outside the chest cavity. An adaptive airbag 11 is flexibly connected to the first end, and a counterweight is arranged inside the adaptive airbag 11. The counterweight is used to make the adaptive airbag 11 descend to the accumulation of fluid in the chest cavity under the action of gravity.

[0047] like Figure 1 and Figure 2 As shown, the interior of the adaptive airbag 11 is also provided with a drainage channel 110 connected to the first end, the inlet end 111 of the drainage channel 110 is provided with a first one-way valve 16, the outflow end of the drainage channel 110 is provided with a second one-way valve 17, and a pressure difference driven diaphragm 12 and a corresponding chamber 124 are provided on the periphery of the adaptive airbag 11, the chamber 124 is connected to the drainage channel 110, the pressure difference driven diaphragm 12 swings back and forth with the change of the internal pressure of the chest cavity, so that the drainage channel 110 forms a negative pressure to introduce the accumulated fluid into the drainage channel 110 through the first one-way valve 16.

[0048] The drainage channel 110 is an axial extension of the drainage tube 1. During drainage, the accumulated fluid is sucked from the inlet end 111 of the drainage channel 110, then flows from the first end to the second end of the drainage tube 1, and finally flows into the drainage bottle assembly 2. Specifically, Figure 2As shown, the adaptive airbag 11 can be an ellipsoidal airbag, the inlet end 111 of the drainage channel 110 is arranged at one end in the length direction of the ellipsoidal airbag, the outflow end of the drainage channel 110 is located at the other end in the length direction of the ellipsoidal airbag, and the counterweight is arranged around the inlet end 111.

[0049] like Figure 1 As shown, the adaptive airbag 11 is provided with an inflation pipe 13, and the inflation pipe 13 is used to inflate the adaptive airbag 11; the inflation pipe 13 is arranged along the axial direction of the drainage tube 1, one end of the inflation pipe 13 is connected to the adaptive airbag 11, and the other end extends to the outside of the chest cavity and is provided with an inflation nozzle. When in use, when the adaptive airbag 11 is in an uninflated state, the first end of the drainage tube 1 is inserted into the chest cavity (generally, the intubation is performed between the 6th and 8th intercostal spaces between the mid-axillary line and the posterior axillary line); then a syringe can be used to connect with the inflation nozzle, and a certain amount of gas can be filled into the adaptive airbag 11 through the inflation pipe 13 to expand the adaptive airbag 11. In order to facilitate the control of the length of the drainage tube 1 inserted into the chest cavity, a scale is provided on the surface of the drainage tube 1 along the axial direction, and the scale is used to measure the length of the first end inserted into the chest cavity.

[0050] In this embodiment, the adaptive airbag 11 is flexibly connected to the first end of the drainage tube 1. Therefore, when the human body adjusts its posture (for example, from a supine posture to a side-lying posture), the adaptive airbag 11 can always droop under the action of the counterweight, so that it always faces the place where the fluid accumulates in the chest cavity.

[0051] In this embodiment, in order to enable the adaptive airbag 11 to adaptively probe downward in the chest cavity, the first end (i.e., the insertion end) of the drainage tube 1 is connected to the adaptive airbag 11 by a flexible silicone connecting tube 18. Figure 2 and Figure 4 As shown, the diameter of the silicone connecting tube 18 gradually decreases from one end to the other end, and in the middle section of the silicone connecting tube 18, the tube wall is bent radially inward to form a stacked tube section 181. The length of the stacked tube section 181 is adaptively adjusted with the position of the adaptive airbag 11 in the chest cavity, so that in different human body postures, the adaptive airbag 11 can adaptively move down to the place where the fluid accumulates in the chest cavity. A portion of the middle section of the silicone connecting tube 18 has radial wrinkles, thereby producing partially overlapping stacked tube sections 181. The changes in the bending of the stacked tube sections 181 and the length of the stacked tubes can be adjusted automatically according to the position of the adaptive airbag 11 moving down. Since the silicone connecting tube 18 is flexible and there is a stacked tube section 181 in the middle section, the silicone connecting tube 18 will not pull the adaptive airbag 11 to move down. Figure 2 and Figure 3 As shown, Figure 3 Adaptive airbag Figure 2After the state shown moves downward, it moves along Figure 3 A schematic diagram of the length of the silicone connecting tube 18 after moving in the direction indicated by the arrow h; Figure 3 It can be seen that when the adaptive airbag 11 continues to move downward at the current position, the stacked tube section 181 becomes shorter and the bend 183 moves away from the adaptive airbag 11. On the contrary, when the adaptive airbag 11 moves upward at the current position, the stacked tube section 181 becomes longer and the bend 183 moves toward the end close to the adaptive airbag 11.

[0052] The radial bending of the middle part of the silicone connecting tube 18 means that the tube wall at a certain position in the middle part is bent radially all around, so that the silicone connecting tube 18 partially overlaps at the bending part 183 but does not block the tube. In addition, in the present embodiment, the diameter of the silicone connecting tube 18 gradually decreases from one end to the other end, and the tube section with a smaller diameter overlaps the inner side of the tube section with a larger diameter, and the two tube walls of the overlapping part will not be tightly attached together, thereby reducing the length of the overlapping tube section 181 and the friction resistance when adjusting the position of the bending part, so that the adaptive airbag 11 can be more smoothly adjusted in the chest cavity.

[0053] In this embodiment, a plurality of grooves 182 are arranged at intervals along the axial direction on the outer surface of the tube wall of the middle section to reduce the stress overcome by the tube wall when bending inward. The grooves 182 are formed by partially digging out the outer surface of the tube wall of the middle section, so that the tube wall of this section is thinned at intervals along the axial direction. Therefore, when the middle section of the silicone connecting tube 18 is bent radially, the outer surface of the tube wall will not be relatively squeezed, thereby reducing the force required for the tube wall to bend inward, thereby making the adjustment of the length and bending position of the stacked tube section 181 smoother.

[0054] like Figure 2 As shown, in this embodiment, the pressure difference driven diaphragm 12 includes: a thickened outer frame 121 , an elastic deformation wrinkle area 122 and an arc-shaped middle diaphragm 123 .

[0055] The thickened outer frame 121 is arranged at the periphery of the elastic deformation folded area 122, and is formed by the adaptive airbag 11 being thickened in the thickness direction, and forms a stable annular frame after the adaptive airbag 11 is inflated. The outer edge of the elastic deformation folded area 122 is connected to the thickened outer frame 121, and the inner edge is connected to the middle diaphragm 123. The elastic deformation folded area 122 includes more than two annular ripples, which are used to elastically deform in the thickness direction as the internal pressure of the chest cavity changes, so as to drive the middle diaphragm 123 to swing back and forth.

[0056] Among them, the thickened outer frame 121 and the elastic deformation folded area 122 and the middle diaphragm 123 in the pressure difference driven diaphragm 12 are made of different materials. The thickened outer frame 121 and the adaptive airbag 11 are made of the same material, which can be polyester fiber (Polyethylene Terephthalate, PET) or polypropylene fiber (PP). The elastic deformation folded area 122 and the middle diaphragm 123 are made of another film material, which can be polyarylate (PAR) film or polyethylene diformate (PEN) film. The thickened outer frame 121 is used to form a frame with a certain structural strength, thereby providing a stable structural foundation for the reciprocating swing of the elastic deformation folded area 122 and the middle diaphragm 123, and the elastic deformation folded area 122 is provided with a plurality of annular corrugations, so that it can easily swing with the pressure change in the chest cavity, thereby driving the middle diaphragm 123 to swing back and forth together.

[0057] In this embodiment, the pressure difference driven diaphragm 12, the first one-way valve 16 and the second one-way valve 17 are combined to form a pump body structure, the first one-way valve 16 only allows the accumulated fluid to flow from the chest cavity to the inlet end 111, and the second one-way valve 17 only allows the accumulated fluid to flow out from the inlet end 111 to the first end of the drainage tube 1, and under the action of the pressure fluctuation inside the chest cavity caused by breathing, the pressure difference driven diaphragm 12 swings back and forth, sucking the accumulated fluid from the inlet end 111 of the drainage channel 110 and discharging it from the outflow end (that is, sucking it from the first one-way valve 16 and discharging it from the second one-way valve 17) to the first end of the drainage tube 1. Specifically, the first one-way valve 16 includes a valve plate 161 and a retaining ring 162 that abuts against the edge of the valve plate 161. The valve plate 161 is hinged inside the inlet end 111. When the pressure in the chest cavity rises due to breathing, the pressure outside the first one-way valve 16 is equal to the pressure outside the pressure-differential driven diaphragm 12. The pressure outside the first one-way valve 16 is greater than the pressure inside. When the first one-way valve 16 is opened, the accumulated fluid can enter the drainage channel 110 through the first one-way valve 16. The pressure outside the pressure-differential driven diaphragm 12 is greater than the pressure inside. The pressure-differential driven diaphragm 12 undergoes elastic expansion. The deformation swings inward, so that the second one-way valve 17 opens, and the accumulated fluid flows from the drainage channel 110 into the first end of the drainage tube 1; when the pressure in the chest cavity drops due to breathing, the pressure inside the drainage channel 110 is greater than the pressure in the chest cavity, and the pressure difference is superimposed on the elastic force of the pressure difference driven diaphragm to restore the elastic deformation, thereby driving the pressure difference driven diaphragm 12 to swing outward, at this time, the second one-way valve 17 is closed to prevent the accumulated fluid from flowing back from the second one-way valve 17, and the above-mentioned pressure difference and elastic force are superimposed to open the first one-way valve 16, and the accumulated fluid flows into the drainage channel 110 from the inlet end 111. Repeating the above process can continuously suck the accumulated fluid into the first end of the drainage tube 1 and discharge it along the second end. In addition, in this embodiment, the above-mentioned first one-way valve 16 and the second one-way valve 17 can not only cooperate with the pressure difference driven diaphragm 12 to suck the accumulated fluid into the drainage channel and the drainage tube, but also prevent the accumulated fluid from flowing back in the drainage channel 110, thereby ensuring the drainage efficiency of the accumulated fluid.

[0058] like Figure 1 As shown, in one embodiment, in order to facilitate replacement of the drainage bottle assembly 2 when the effusion is full, the second end of the drainage tube 1 is provided with a quick-release connector 14, and the quick-release connector 14 is connected to the drainage bottle assembly 2 via a quick-release pipe 15.

[0059] In this embodiment, the drainage bottle assembly 2 adopts a double-bottle drainage assembly, which can prevent the effusion from being sucked back into the thoracic cavity due to the negative pressure of the thoracic cavity. The drainage bottle assembly 2 includes a collection bottle 21 and a water seal bottle 22; the water seal bottle 22 is filled with physiological saline; the second end is connected to the collection bottle 21, and the collection bottle 21 is connected to the bottom of the water seal bottle through a U-shaped connecting tube 23.

[0060] One end of the quick-release pipe 15 is provided with a joint structure adapted to the quick-release joint 14, the other end of the quick-release pipe 15 is inserted into the middle and upper part of the collection bottle (not inserted into the bottom of the bottle), one end of the U-shaped connecting pipe is inserted into the middle and upper part of the collection bottle, and the other end of the U-shaped connecting pipe is inserted into the bottom of the water seal bottle and submerged below the saline solution. The top of the water seal bottle (i.e. above the saline solution) is also connected to the outside atmosphere through another pipe.

[0061] In the above embodiment, an adaptive airbag 11 is provided at the first end (i.e., the insertion end) of the drainage tube 1, a drainage channel 110 is provided in the adaptive airbag 11, the drainage tube 1 and the adaptive airbag 11 are flexibly connected, and a counterweight is provided in the adaptive airbag 11, so that the adaptive airbag 11 can be probed down to the accumulation of effusion in the thoracic cavity under the action of gravity, thereby effectively solving the technical problem that the intubation depth is difficult to grasp; and the adaptive airbag 11 is provided with a pressure difference driven diaphragm 12, and a first one-way valve 16 and a second one-way valve 17 are provided on the drainage channel 110; through the pressure difference driven diaphragm 12, the first one-way valve 16 and the second one-way valve 17, a periodic pressure difference can be generated on both sides of the pressure difference driven diaphragm 12 with breathing, and the pressure difference driven diaphragm 12 can be swung back and forth, so that the effusion in the thoracic cavity is sucked into the drainage channel 110 and the drainage tube 1, so that the effusion in the thoracic cavity can be better drained.

[0062] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A closed chest drainage device for drainage of pleural effusion, characterized in that: The closed chest drainage device comprises: a drainage tube and a drainage bottle assembly; The drainage tube comprises a first end for inserting into the chest cavity, and a second end for connecting to the drainage bottle assembly; the drainage bottle assembly is used to collect the drained effusion; The first end is flexibly connected to an adaptive airbag, and a counterweight is arranged inside the adaptive airbag, so that the adaptive airbag can move downward to the location where the effusion in the thoracic cavity accumulates under the action of gravity; The adaptive airbag is further provided with a drainage channel connected with the first end, the inlet end of the drainage channel is provided with a first one-way valve, the outflow end of the drainage channel is provided with a second one-way valve, and the periphery of the adaptive airbag is provided with a pressure difference driven diaphragm and a corresponding chamber, the chamber is connected with the drainage channel, and the pressure difference driven diaphragm swings back and forth with the change of the pressure inside the chest cavity, so that the drainage channel forms a negative pressure to introduce the effusion into the drainage channel through the first one-way valve; The pressure difference driven diaphragm comprises: Thickened outer frame, elastic deformation wrinkle zone and arc-shaped middle diaphragm; The thickened outer frame is arranged at the periphery of the elastic deformation folding zone, is formed by the adaptive airbag being thickened along the thickness direction, and forms a stable annular frame after the adaptive airbag is inflated; The outer edge of the elastic deformation folded area is connected to the thickened outer frame, and the inner edge is connected to the middle diaphragm. The elastic deformation folded area includes more than two annular corrugations, which are used to elastically deform along the thickness direction as the pressure inside the chest cavity changes, so as to drive the middle diaphragm to swing back and forth; When the pressure in the chest cavity rises due to breathing, the pressure on the outside of the first one-way valve is greater than the pressure on the inside. The first one-way valve is in an open state, and the accumulated fluid enters the drainage channel through the first one-way valve. The pressure on the outside of the pressure difference driven diaphragm is greater than the pressure on the inside. The pressure difference driven diaphragm undergoes elastic deformation and swings inward, thereby opening the second one-way valve, and the accumulated fluid flows from the drainage channel into the first end of the drainage tube; when the pressure in the chest cavity drops due to breathing, the pressure on the inside of the drainage channel is greater than the pressure in the chest cavity. The pressure difference and the elastic force of the pressure difference driven diaphragm to restore the elastic deformation are superimposed, thereby driving the pressure difference driven diaphragm to swing outward, and the second one-way valve is closed.

2. The closed chest drainage device according to claim 1, characterized in that: The first end is provided with a flexible silicone connecting tube; The diameter of the silicone connecting tube gradually decreases from one end to the other end, and in the middle section of the silicone connecting tube, the tube wall is bent radially inward to form a stacked tube section. The length of the stacked tube section is adaptively adjusted with the position of the adaptive airbag in the chest cavity, so that in different human body postures, the adaptive airbag can adaptively move down to the place where the fluid accumulates in the chest cavity.

3. The closed chest drainage device according to claim 2, characterized in that: A plurality of grooves are arranged at intervals along the axial direction on the outer surface of the tube wall of the middle section to reduce the stress overcome by the tube wall when bending inwards.

4. The closed chest drainage device according to claim 1, characterized in that: It also includes an inflation pipe for inflating the adaptive airbag; the inflation pipe is arranged along the axial direction of the drainage tube, one end of the inflation pipe is connected to the adaptive airbag, and the other end extends outside the chest cavity and is provided with an inflation nozzle.

5. The closed chest drainage device according to claim 1, characterized in that: The second end of the drainage tube is provided with a quick-release joint, and the quick-release joint is connected to the drainage bottle assembly through a quick-release pipe.

6. The closed chest drainage device according to claim 1, characterized in that: The adaptive airbag is an ellipsoidal airbag, and the inlet end is arranged at one end of the ellipsoidal airbag in the length direction; the counterweight is arranged around the inlet end.

7. The closed chest drainage device according to claim 1, characterized in that: The drainage bottle assembly comprises a collection bottle and a water seal bottle; the water seal bottle is filled with physiological saline; The second end is connected to the collecting bottle, and the collecting bottle is connected to the bottom of the water seal bottle through a U-shaped connecting tube.

8. The closed chest drainage device according to claim 1, characterized in that: A scale is provided on the surface of the drainage tube along the axial direction, and the scale is used to measure the length of the first end inserted into the chest cavity.

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