A chest drainage tube

Abstract

This invention relates to the field of medical device technology, and particularly to a chest drainage tube, comprising: a drainage tube body having a drainage channel; a drainage hole provided on the outer periphery of one end of the drainage tube body; a first bladder disposed on the wall of the drainage hole, the first bladder having at least two working states: in a first working state, the first bladder protrudes towards the center line of the drainage hole; in a second working state, the first bladder does not protrude from the wall of the drainage hole; a first channel disposed within the wall of the drainage tube body and communicating with the first bladder; fluid is introduced into or extracted from the first bladder through the first channel, so that the first bladder can switch between the first working state and the second working state or remain in the second working state. This invention can prevent the chest drainage tube from being blocked when draining effusion.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a chest drainage tube. Background Technology

[0002] Pleural effusion is a common symptom in clinical practice. For patients with pleural effusion, it is necessary to drain the fluid from the pleural cavity promptly. Current technology typically uses a chest drainage tube to drain the fluid from the pleural cavity. When using a conventional chest drainage tube, one end is inserted into the patient's pleural cavity, and the other end is connected to a device for collecting the fluid.

[0003] Because pleural effusion may include various thick fluids and impurities, such as hemothorax, pus, and tissue mucosa, it can easily lead to blockage of the drainage tube. Summary of the Invention

[0004] To solve, or at least partially solve, the above-mentioned technical problems, the present invention provides a chest drainage tube.

[0005] This invention provides a chest drainage tube, comprising:

[0006] The drainage tube body has a drainage channel; a drainage hole is provided on the outer periphery of one end of the drainage tube body;

[0007] A first capsule is disposed on the wall of the drainage hole. The first capsule has at least two working states: in the first working state, the first capsule protrudes towards the center line of the drainage hole; in the second working state, the first capsule does not protrude from the wall of the drainage hole.

[0008] A first channel is disposed within the wall of the drainage tube body and communicates with the first capsule; fluid is injected into or extracted from the first capsule through the first channel so that the first capsule can switch between the first working state and the second working state or remain in the second working state.

[0009] The chest drainage tube described above, optionally,

[0010] The first capsule is annular and arranged along the wall corresponding to the drainage hole.

[0011] The chest drainage tube described above, optionally, also includes,

[0012] The second capsule is disposed at the edge of the outer end of the drainage hole; when the second capsule is filled with fluid, it can protrude from the outer periphery of the drainage tube body and / or protrude from the inner wall of the drainage hole in the direction of the center line of the drainage hole.

[0013] The chest drainage tube described above, optionally, also includes,

[0014] A second channel is connected to the second capsule; to allow fluid to be filled into or extracted from the second capsule through the second channel.

[0015] After the fluid in the second capsule is extracted, the second capsule does not protrude from the outer wall of the drainage tube body, but is recessed into the wall of the drainage hole.

[0016] In the chest drainage tube described above, optionally, the second channel is connected to the first channel.

[0017] The chest drainage tube described above, optionally, also includes,

[0018] A flow guide is connected to one end of the drainage tube body near the drainage hole; the flow guide has a flow guide cavity that communicates with the drainage channel; the cross-sectional area of ​​the flow guide cavity gradually increases in the direction away from the drainage tube body;

[0019] The flow guide has a third bladder on the wall near the flow guide cavity; the third bladder can protrude to one side of the flow guide cavity when fluid is filled.

[0020] In the chest drainage tube described above, optionally, the number of the third sacs is at least two, and the third sacs are evenly distributed around the centerline of the guide.

[0021] The chest drainage tube described above, optionally, also includes,

[0022] A third channel is formed within the wall of the drainage tube body and communicates with the third capsule to allow fluid to be introduced into or extracted from the third capsule.

[0023] In the chest drainage tube described above, optionally, the third sac is composed of a guide body and a sac wall, with the sac wall located on the side of the guide body near the guide cavity;

[0024] A cavity is formed between the bladder wall and the guide body; the thickness of the bladder wall is less than the thickness of the guide body.

[0025] The chest drainage tube described above may optionally include a limiting sac.

[0026] The limiting capsule includes a cannula and a capsule sheath;

[0027] The sleeve has a through hole for the drainage tube body to pass through;

[0028] The bladder is sealed to the outer periphery of the sleeve, and when filled with fluid, a first annular groove is formed on the outer periphery of the bladder.

[0029] The chest drainage tube described above, optionally,

[0030] The bladder sleeve is provided with an inlet hole, which is located on the side of the bladder sleeve away from the drainage hole; an openable inlet plug is connected to the inlet hole.

[0031] The chest drainage tube described above, optionally,

[0032] The first annular slot has anti-slip protrusions on its groove wall.

[0033] The chest drainage tube described above, optionally, also includes,

[0034] A fourth bladder is fixedly formed on the inner wall of the drainage tube body; the fourth bladder can protrude into the drainage channel when fluid is filled or recess into the inner wall of the drainage tube body when fluid is withdrawn.

[0035] The chest drainage tube described above, optionally, also includes,

[0036] A fourth channel is formed within the wall of the drainage tube body and communicates with the fourth bladder to allow fluid to be introduced into or extracted from the fourth bladder.

[0037] Compared to existing technologies, in this invention, a first bladder is provided on the inner wall of the drainage hole, and a first channel is provided in the wall of the drainage tube body. Physiological saline or air is filled into the first bladder through the first channel, or physiological saline or air is discharged from the first bladder, causing the first bladder to continuously expand and contract. This repeatedly squeezes and relaxes the debris blocking the drainage hole, which helps to prevent debris from clogging the drainage hole and to clear the debris blocking the drainage hole. Attached Figure Description

[0038] To more clearly illustrate the embodiments of the present invention, the relevant accompanying drawings will be briefly described below. It should be understood that the drawings described below are only for illustrating some embodiments of the present invention, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0039] Figure 1 This is a schematic diagram of the chest drainage tube proposed in the first embodiment of the present invention;

[0040] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0041] Figure 3 This is a schematic diagram of the first distribution method of the drainage holes proposed in the first embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the second distribution method of the drainage holes proposed in the first embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the first capsule proposed in the second embodiment of the present invention when it expands;

[0044] Figure 6 This is a schematic diagram of the structure of the first cyst with protrusions proposed in the second embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the structure of a first cyst in a contracted state according to the second embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the structure of a first capsule in an inflated state according to the second embodiment of the present invention;

[0047] Figure 9 This is a partial structural schematic diagram of a chest drainage tube proposed in the third embodiment of the present invention;

[0048] Figure 10 yes Figure 9 A magnified view of a portion of point B in the middle;

[0049] Figure 11 This is a partial structural schematic diagram of the chest drainage tube proposed in the fourth embodiment of the present invention;

[0050] Figure 12 yes Figure 11 A magnified view of a portion of point C in the middle;

[0051] Figure 13 This is a front view of the flow guide proposed in the fourth embodiment of the present invention;

[0052] Figure 14 This is a schematic diagram of the chest drainage tube according to the fifth embodiment of the present invention;

[0053] Figure 15 This is a schematic diagram of the installation structure of the limiting bladder and the drainage tube body according to the fifth embodiment of the present invention;

[0054] Figure 16 This is a cross-sectional view of the limiting capsule proposed in the fifth embodiment of the present invention;

[0055] Figure 17 This is a schematic diagram of the structure of the limiting capsule proposed in the fifth embodiment of the present invention;

[0056] Figure 18 This is a partial structural schematic diagram of the chest drainage tube proposed in the sixth embodiment of the present invention;

[0057] Figure 19 This is a cross-sectional view of the fourth capsule proposed in the sixth embodiment of the present invention;

[0058] Figure 20 This is a schematic diagram of the connection structure between the fourth capsule and the fourth channel proposed in the sixth embodiment of the present invention.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100 - Drainage tube body, 200 - Guide component, 300 - Limiting bladder;

[0061] 110-First capsule, 120-Drainage channel, 130-Drainage hole, 140-First channel, 150-Second capsule, 160-Second channel, 170-Third channel, 180-Fourth capsule, 190-Unblocking area;

[0062] 111 - First expansion segment, 112 - Second expansion segment;

[0063] 131-First groove, 132-First capsule layer, 133-First capsule cavity, 134-Protrusion;

[0064] 151 - Second capsule layer, 152 - Second groove, 153 - Second capsule cavity;

[0065] 181-Fourth channel, 182-Fourth groove, 183-Fourth capsule layer, 184-Fourth capsule cavity;

[0066] 191 - Unblocking Unit;

[0067] 210-Flow guiding cavity, 220-Notch, 230-Third bladder, 240-Flow guiding component body, 250-Blade wall;

[0068] 231-Third cystic cavity;

[0069] 241 - Third slot;

[0070] 310 - cannula, 320 - balloon sheath, 330 - limiting balloon cavity;

[0071] 311-Through hole, 312-Snap ring, 313-Second slot;

[0072] 321-First annular groove, 322-Inner capsule layer, 323-Outer capsule layer, 324-Side capsule layer, 325-Inner protrusion, 326-Outer protrusion, 327-Recess, 328-Inlet hole, 329-Inlet hole plug. Detailed Implementation

[0073] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0074] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0075] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0076] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0077] Unless otherwise stated, the term "multiple" means two or more, and "multiple groups" means two or more groups.

[0078] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0079] The applicant discovered that when using a chest drainage tube to drain pleural effusion, the presence of mucous membranes, blood clots, or other debris in the effusion can easily lead to blockage of the tube. Blockages typically occur at the inlet of the chest drainage tube or inside the tube itself. For externally located drainage tubes, if blockage occurs inside the tube, an alcohol-soaked cotton ball or pad can be used to press upstream of the blockage and slide downstream to clear it. However, blockages at the inlet of the chest drainage tube or inside the body are more difficult to clear. Once a chest drainage tube becomes blocked, the effusion cannot be effectively drained, usually requiring more frequent replacement of the chest drainage tube.

[0080] In view of this, the inventors of the present invention provide a chest drainage tube to solve the above-mentioned problems. Several specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0081] First Embodiment

[0082] The chest drainage tube mentioned in this embodiment, such as Figures 1 to 4 As shown, the chest drainage tube includes a drainage tube body 100 and a first sac 110. The drainage tube body 100 is a tubular structure with openings at both ends, and has a drainage channel 120 inside. In use, one end of the drainage tube body 100 is inserted into the patient's chest cavity to facilitate the drainage of pleural effusion along the drainage channel 120.

[0083] In use, if the end of the chest drainage tube 100 located inside the patient's chest cavity rests against the inner wall of the chest cavity, that end can easily become blocked, making it difficult for the effusion to drain. Therefore, this embodiment provides a drainage hole 130 on the outer periphery of one end of the drainage tube 100, allowing the effusion in the patient's chest cavity to enter the drainage channel 120 and drain through the port of the end of the drainage tube 100 located inside the patient's chest cavity or through the drainage hole 130. While this method avoids the probability of the chest drainage tube entrance being completely blocked, the presence of impurities such as mucous membranes in the effusion can also cause the drainage hole 130 to become blocked. This embodiment further improves upon this.

[0084] Please refer to Figure 1 and Figure 2In this embodiment, a first capsule 110 is also provided on the wall of the drainage hole 130, and a first channel 140 is provided inside the wall of the drainage tube body 100. The first channel 140 communicates with the first capsule 110, and the other end communicates with an external power component. The external power component is used to fill the first capsule 110 with fluid or extract fluid from the first capsule 110 through the first channel 140. This allows the first capsule 110 to have at least two working states: In the first working state, the first capsule 110 protrudes towards the center of the drainage hole 130, that is, the first capsule 110 expands due to being filled with fluid. At this time, the flow cross section of the drainage hole 130 at the position of the first capsule 110 becomes smaller; In the second working state, the first capsule 110 does not protrude from the wall of the drainage hole 130. At this time, the flow cross section of the drainage hole 130 at the position of the first capsule 110 becomes larger. That is, in the second working state, the first bladder 110 can be flush with the wall of the drainage hole 130 or recessed into the wall of the drainage hole 130.

[0085] By periodically controlling the filling or extraction of fluid into the first capsule 110, the flow cross-section of the drainage hole 130 at the first capsule 110 can be periodically increased or decreased, thereby clearing the mucus and other debris blocking the drainage hole 130.

[0086] In practical use, the first bladder 110 can be controlled to periodically expand and contract throughout the entire process of use. Alternatively, when no blockage occurs, the first bladder 110 can be controlled to maintain a second working state during normal flow. When a blockage occurs and the flow rate is too slow, the first bladder 110 can be controlled to be in a periodic expansion and contraction state. The periodic expansion and contraction referred to here means that the first bladder 110 continuously switches between the first working state and the second working state.

[0087] It should be noted that, in this embodiment, the inlet of the drainage tube body 100 includes the port at one end of the drainage tube body 100 located within the thoracic cavity and the drainage hole 130. The fluid referred to in this embodiment includes liquid or gas; when the fluid is liquid, it can be saline solution; when the fluid is gas, it can be air. Compared to air, introducing saline solution into the first sac 110 allows for precise control of the expansion or contraction within the first sac 110 by controlling the volume of the introduced saline solution.

[0088] Please refer to Figure 3 and Figure 4Preferably, in this embodiment, there can be multiple drainage holes 130, distributed along the outer periphery of one end of the drainage tube body 100. For ease of explanation, the end of the drainage tube body 100 with the drainage holes 130 is referred to as the first end, i.e., the end used for insertion into the patient's chest cavity is the first end, and the other end is the second end. The drainage holes 130 are distributed in multiple rings around the outer periphery of the first end of the drainage tube body 100, and adjacent rings of drainage holes 130 may be staggered in the circumferential direction. Along the circumferential direction, the drainage holes 130 can be arranged in multiple rows. Of course, the drainage holes 130 may also be distributed within a certain length of the outer periphery of the first end of the drainage tube body 100 without following a specific pattern. In use, the first end of the drainage tube body 100 is located in the patient's chest cavity, and all drainage holes 130 should be located in the patient's chest cavity.

[0089] In this embodiment, a first capsule 110 may be provided in each drainage hole 130, or the first capsule 110 may be provided in some drainage holes 130. This embodiment is not limited to this.

[0090] In this embodiment, the shape of the first bladder 110 is not limited, as long as the first bladder 110 can protrude towards the center line of the corresponding drainage hole 130, the flow cross section of the corresponding drainage hole 130 can be adjusted.

[0091] It should be noted that, in this embodiment, the external power component can be an air pump, a liquid pump, or other components capable of filling the first bladder 110 with fluid or pumping fluid out of the first bladder 110. Those skilled in the art can implement this, and it will not be elaborated further here.

[0092] The exemplary usage process disclosed in this embodiment is as follows: In use, the first end of the drainage tube body 100 is inserted into the patient's pleural cavity; and the portion of the drainage tube body 100 with the drainage hole 130 is inserted into the patient's pleural cavity so that pleural effusion can flow into the drainage channel 120 along the port or drainage hole of the first end of the drainage tube body 100. The second end of the drainage channel 120 of the drainage tube body 100 is connected to an external device, and the first channel 140 is connected to an external power component.

[0093] During use, after physiological saline is filled into the first capsule 110, the first capsule 110 expands and is squeezed towards the centerline of the drainage hole 130, reducing the flow cross-section of the drainage hole 130. This allows for the squeezing out of any debris blocking the drainage hole 130. When physiological saline is withdrawn from the first capsule 110, the first capsule 110 contracts, becoming concave within or flush with the wall of the drainage hole 130, increasing the flow cross-section of the drainage hole 130. At this point, the first capsule 110 no longer squeezes out debris, and its contraction creates a larger space. By repeatedly controlling the expansion and contraction of the first capsule 110, it is possible to prevent debris from clogging the drainage hole 130.

[0094] In practical applications, the first bladder 110 can be controlled to periodically expand and contract only when the drainage hole 130 is blocked. During normal drainage of accumulated fluid, the first bladder 110 can be kept in the second working state.

[0095] It should be noted that the saline solution used in the above exemplary use process can also be air, which will not be elaborated here.

[0096] Second Embodiment

[0097] In the first embodiment, although a first bladder 110 is provided on the inner wall of the drainage hole 130, the expansion and contraction of the first bladder 110 can clear the debris blocking the side near the first bladder 110. However, the clearing effect is limited for the part where the first bladder 110 is not provided.

[0098] In view of this, this embodiment also proposes a chest drainage tube. This embodiment is a further improvement based on the first embodiment, the main improvement being:

[0099] Please refer to Figures 1 to 8The first capsule 110 is annular and arranged along the wall of the corresponding drainage hole 130. Preferably, the centerline of the first capsule 110 coincides with the centerline of the drainage hole 130. The first capsule 110 may be composed of a first groove 131 and a first capsule layer 132 formed on the inner wall of the drainage hole 130. The edge of the first capsule layer 132 is sealed to the edge of the opening of the first groove 131. The first capsule layer 132 and the first groove 131 cooperate to form a first capsule cavity 133, which communicates with the first channel 140. Depending on the shape of the first capsule 110 to be formed, the shape of the first groove 131 is also different. In some preferred embodiments, the first groove 131 is annular, and the centerline of the first groove 131 coincides with the centerline of the drainage hole 130. The first capsule layer 132 is sealed to the opening of the first groove 131 circumferentially to form an annular first capsule cavity 133. The first channel 140 is connected to the first groove 131 so that gas or saline solution can be filled into or discharged from the first capsule 110 through the first channel 140.

[0100] Please refer to Figure 1 , Figure 2 and Figures 5 to 8 The first capsule layer 132 is an elastic membrane. When the first capsule cavity 133 is filled with saline or air, the first capsule layer 132 bulges inward, compressing the flow cross-section of the drainage hole 130. When the first capsule body 110 is annular, after being filled with saline or air, it can squeeze the debris blocking the drainage hole 130 from the circumference inward. After the saline or air in the first capsule body 110 is extracted, the squeezed debris can diffuse to the surroundings. Through repeated expansion and contraction, the blockage debris can be cleared from the circumference. In some preferred embodiments, the first capsule layer 132 has a protrusion 134 on the side opposite to the first groove 131. The protrusion 134 on the first capsule layer 132, in conjunction with the expansion of the first capsule layer 132, helps to compress and cut the blockage debris, cutting off mucus and mucous membrane debris, thereby improving the clearing efficiency.

[0101] In specific implementation, please refer to Figures 5 to 8The first capsule 110 has a first expansion section 111 and a second expansion section 112 circumferentially around the drainage hole 130. The first expansion section 111 and the second expansion section 112 are connected end to end to form a ring. After the first capsule 110 is filled with saline or air, the expansion amount of the first expansion section 111 is less than the expansion amount of the second expansion section 112. In some implementations, the thickness of the first capsule layer 132 at the first expansion section 111 can be made greater than the thickness of the first capsule layer 132 corresponding to the second expansion section 112 during manufacturing. This ensures that under the same pressure, the expansion amount of the second expansion section 112 is greater than the expansion amount of the first expansion section 111. Through this non-uniform expansion method, greater squeezing force and pushing amplitude can be provided to the debris blocking the second expansion section 112. Thus, when the drainage hole 130 is blocked, the non-uniform expansion increases the amount of extrusion on some of the debris. After the second expansion section 112 contracts, the debris in this part has more room to move, which can achieve priority clearing of the position near the second expansion section 112, thus improving the ability to clear blocked debris.

[0102] In some implementations, the first expansion segment 111 can also be a solid structure, that is, the first expansion segment 111 may not expand or contract.

[0103] Third Embodiment

[0104] In the first and second embodiments, although blockages inside the drainage hole 130 can be cleared, in practical applications, viscous debris such as mucus and pus in the pleural effusion of a patient can easily remain partially outside and partially inside the drainage hole 130, leading to blockage. This is mainly because the outer edge of the drainage hole 130 is approximately right-angled. When viscous debris such as mucus and pus enter the drainage hole 130, the resistance increases, making it easy to become blocked.

[0105] In this situation, increasing the diameter of the drainage hole 130 is an effective solution to the blockage of the drainage hole 130. However, in actual operation, when inserting the first end of the drainage tube body 100 into the patient's chest cavity, the first end of the drainage tube needs to be bent. If the diameter of the drainage hole 130 is too large, the drainage tube body 100 may be excessively flattened during the bending process, resulting in a smaller flow cross-section of the drainage channel 120 and causing internal blockage.

[0106] On the other hand, within a reasonable range, regardless of how the diameter of the drainage hole 130 is set, when the first end of the drainage tube body 100 is bent, a sharp edge is easily formed at the outer edge of the drainage hole 130, which can easily cause damage to the patient's internal organs or chest wall when it comes into contact with them.

[0107] Please refer to Figure 9 and Figure 10 To address the aforementioned issues, this embodiment also proposes a chest drainage tube. This embodiment is a further improvement based on the first or second embodiment. The similarities will not be repeated here; only the differences will be explained below.

[0108] Based on Embodiment 1 or Embodiment 2, this embodiment redesigns the outer edge of the drainage hole 130. This embodiment has at least two objectives: first, to clear blockages at the outer edge of the drainage hole 130; and second, to prevent sharp edges from forming after bending the first end of the drainage tube body 100, which could cause injury to the patient. The main improvement of this embodiment is the provision of a second bladder 150 at the outer edge of the drainage hole 130.

[0109] Specifically, a chamfer can be first set at the outer edge of the drainage hole 130, and a second capsule 150 can be set along the chamfer, or a solid annular silicone tube can be used instead of the second capsule 150. If an annular silicone tube is used, its surface should be rounded and should not protrude excessively outward or inward into the drainage hole 130. When setting the second capsule 150, filling the second capsule 150 with air or saline can prevent the formation of sharp edges at the outer edge of the drainage hole 130. This method can avoid the formation of sharp edges after bending the first end of the drainage tube body 100, which could cause injury to the patient.

[0110] To clear blockages at the outer edge of the drainage hole 130, or to prevent blockages at the outer edge of the drainage hole 130, this embodiment makes a further improvement: a second channel 160 is provided inside the wall of the drainage tube body 100, and the second channel 160 is connected to the second capsule 150. The function of the second channel 160 is to introduce saline or air into the second capsule 150, or to drain saline or air from the second capsule 150.

[0111] The second sac 150 expands after being filled with saline or air, protruding either outwards from the outer periphery of the drainage tube body 100 or towards the centerline of the drainage tube. In practical applications, the second sac 150 can also protrude outwards from the outer periphery of the drainage tube body 100 and towards the centerline of the drainage tube body 100 after being filled with saline or air. The second sac 150 contracts after the saline or air is expelled. When blockage occurs at the outer edge of the drainage hole 130, there are usually two situations: one is that part of the elongated mucus is located outside the drainage hole 130, part is located inside the drainage channel 120, and the middle part passes through the drainage hole 130; the other is that debris in the accumulated fluid blocks the outer side of the drainage hole 130. When the second bladder 150 expands, it can push the mucus to move. In particular, when the second bladder 150 protrudes outward from the outer periphery of the drainage tube body 100, it can loosen the mucus from the outer wall of the drainage tube. When the second bladder 150 contracts, the space around the loosened mucus increases, which will cause a small movement along the flow direction of the accumulated fluid. By repeatedly controlling the expansion and contraction of the second bladder 150, blockage at the outer edge of the drainage hole 130 can be avoided.

[0112] Please refer to Figure 10 In specific implementation, the second capsule 150 can be formed by a second capsule layer 151 and a second groove 152. Specifically, the second groove 152 is located at the edge of the drainage hole 130, and the edges of the second capsule layer 151 and the second groove 152 are sealed together. A second capsule cavity 153 is formed between the second capsule layer 151 and the second groove 152, and the second capsule cavity 153 communicates with the second channel 160. Physiological saline or air is filled into the second capsule cavity 153 through the second channel 160, or physiological saline is discharged after passing through the second capsule cavity 153 and the second channel 160.

[0113] The second capsule layer 151 is an elastic membrane, which can be made of elastic materials such as silicone. The second groove 152 can be an arc-shaped groove with a cross-section that is recessed into the wall of the drainage tube body 100.

[0114] In practical use, before inserting the first end of the drainage tube body 100 into the patient's chest cavity after bending it, saline or air is first filled into the second sac 150 through the second channel 160, causing the second sac 150 to be inflated. After inserting the first end of the drainage tube body 100 into the patient's chest cavity and fixing the drainage tube body 100, saline or air can be repeatedly filled or withdrawn from the second sac 150. That is, the second sac 150 can periodically expand and contract throughout the entire process of draining pleural effusion to prevent the drainage hole 130 from being blocked. Alternatively, when the effusion drainage rate is too low, the periodic expansion and contraction of the second sac 150 can be controlled to clear the drainage hole 130.

[0115] It should be noted that the second channel 160 and the first channel 140 can be connected or each can be an independent channel. When the second channel 160 is connected to the first channel 140, the expansion and contraction of the first capsule 110 and the second capsule 150 can be controlled synchronously. This also helps reduce the number of channels required on the wall of the drainage tube body 100, thus reducing manufacturing difficulty. Setting the first channel 140 and the second channel 160 as independent channels facilitates individual control of the first capsule 110 and the second capsule 150, allowing for precise control of each. When the first channel 140 and the second channel 160 are independent channels, the first capsule 110 and the second capsule 150 can expand and contract synchronously, or they can expand and contract asynchronously. In practical applications, when the first channel 140 and the second channel 160 are set independently, the expansion and contraction cycle of the first bladder 110 can be controlled to be an integer multiple of the expansion and contraction cycle of the second bladder 150. For example, the expansion and contraction cycle of the first bladder 110 can be set to 2 to 8 times that of the second bladder 150, or the expansion and contraction cycle of the second bladder 150 can be set to 2 to 8 times that of the first bladder 110. This setting allows the first bladder 110 and the second bladder 150 to expand simultaneously or asynchronously during the drainage of pleural effusion, which is beneficial for compressing and relaxing debris in the drainage hole 130 to different degrees, thus improving the drainage effect. Of course, in some other solutions, the expansion and contraction cycle of the first bladder 110 can also be set to other multiples of the expansion and contraction cycle of the second bladder 150, as long as the expansion and contraction cycles of the first bladder 110 and the second bladder 150 are different.

[0116] It should be noted that, in this embodiment, the expansion and contraction cycle of the cyst includes: filling the cyst with saline or air, maintaining the cyst in an expanded state, withdrawing saline or air from the cyst, and maintaining the cyst in a contracted state. The cyst referred to here is either the first cyst or the second cyst, or it could be the third or fourth cyst in other embodiments of this disclosure. In each contraction cycle, the time for each of the four stages—filling the cyst with saline or air, maintaining the cyst in an expanded state, withdrawing saline or air from the cyst, and maintaining the cyst in a contracted state—can be controlled according to actual needs, which can be achieved by those skilled in the art, and will not be elaborated further here.

[0117] Fourth embodiment

[0118] The first to third embodiments described above have effectively solved the blockage problem at the drainage hole 130. However, in some cases, there is still a risk of blockage at the port of the first end of the drainage tube body 100. Generally speaking, the diameter of the port of the first end of the drainage tube body 100 is larger than the diameter of the drainage hole 130. However, when the port of the first end of the drainage tube body 100 is close to the chest wall or internal organs, especially when the port of the first end of the drainage tube body 100 faces the chest wall or internal organs and the distance is too close, during the drainage of accumulated fluid, due to the negative pressure at the port of the first end of the drainage tube body 100, the port of the first end of the drainage tube body 100 may be blocked by the chest wall or internal cavity.

[0119] To address the above issues, this embodiment also proposes a chest drainage tube. The chest drainage tube proposed in this embodiment can be a further improvement based on any one of the first to third embodiments, or it can be a separate improvement made specifically for chest drainage tubes. That is, this embodiment can be used in combination with any one of the first to third embodiments, or it can be used alone.

[0120] Please refer to Figures 11 to 13 Specifically, a guide member 200 is provided at the first end of the drainage tube body 100. The guide member 200 is made of a soft material, such as silicone. In its natural state, the guide member 200 has a flared structure. The smaller opening end of the guide member 200 is fixedly connected to the first end of the drainage tube body 100. The guide member 200 has a guide cavity 210, which communicates with the drainage channel 120. The cross-sectional area of ​​the guide cavity 210 gradually increases along the direction away from the drainage tube body 100. In a preferred embodiment, in its natural state, the guide cavity 210 has a conical structure, that is, the guide member 200 has a funnel-shaped structure. Because the guide member 200 has a flared structure, it helps to prevent complete blockage. Please refer to... Figure 13 On the other hand, a notch 220 is provided on the edge of the guide member 200 away from the drainage tube. There can be multiple notches 220, evenly distributed along the circumference of the guide member 200. By providing the notch 220, it can be ensured that even if the end of the guide member 200 is pressed against the internal organs or the inner wall of the pleural cavity, the effusion in the patient's pleural cavity can still enter the drainage cavity 210 through the notch 220. Because the guide member 200 has an flared structure, it needs to be pinched in the middle before being inserted into the patient's pleural cavity through the surgical incision. Of course, in practical applications, considering the impact on the patient's surgical incision during use, the diameter of the larger end of the guide member 200 is set according to actual needs.

[0121] While the guide element 200 can prevent the first end of the drainage tube body 100 from being completely blocked to some extent, blockage can still occur when there are impurities such as tissue mucosa or blood clots in the drainage cavity 210. To solve this problem, in another implementation, a third bladder 230 is provided on the inner side of the guide element 200, that is, on the side of the guide element 200 near the drainage cavity 210. The function of the third bladder 230 is that when physiological saline or air is filled into the third bladder 230, the third bladder 230 can bulge towards the drainage cavity 210, and when the physiological saline or air is discharged from the third bladder 230, the third bladder 230 contracts. By controlling the repeated expansion and contraction of the third bladder 230, the impurities accumulated in the drainage cavity 210 can be intermittently squeezed, which is beneficial for unblocking.

[0122] The filling and emptying of saline or air within the third sac 230 is achieved via the third channel 170. The third channel 170 is located within the wall of the drainage tube body 100 and communicates with the third sac 230. Since the third sac 230 cannot inflate when the drainage tube body 100 is inserted into the patient's pleural cavity, while the second sac 150 needs to inflate, the third channel 170 can communicate with the first channel 140 or be a separate device, but it cannot communicate with the second channel 160.

[0123] The number of third bladders 230 is at least two, and in some embodiments, it can be three. Preferably, they can be evenly distributed along the inner circumference of the guide member. In a preferred embodiment, the number of notches 220 is also three, with the three third bladders 230 and the three notches 220 spaced apart.

[0124] The third bladder 230 is composed of a flow guide body 240 and a bladder wall 250, with the bladder wall 250 located on the side of the flow guide body 240 near the flow guide cavity 210. Specifically, the flow guide body 240 may have a third groove 241 on the side near the flow guide cavity 210, and the bladder wall 250 is sealed along the opening of the third groove 241.

[0125] In actual manufacturing, the third capsule 230 can also be directly provided inside the flow guide 200 with the third capsule cavity 231. The thickness of the wall of the third capsule cavity 231 on the side near the flow guide cavity 210 is less than the thickness of the wall of the third capsule cavity 231 on the side away from the flow guide cavity 210. This is so that the third capsule 230 protrudes towards the side near the flow guide cavity 210 after being filled with saline or air.

[0126] In use, when inserting the first end of the drainage tube body 100 into the patient's chest cavity, the third sac 230 is kept in a contracted state. The guide member 200 is then pinched into a bundle and inserted into the patient's chest cavity through the surgical incision. During the drainage of pleural effusion, the third sac 230 can be periodically expanded and contracted through the third channel 170, causing the fluid and debris in the drainage cavity 210 to be repeatedly squeezed and relaxed, which helps prevent blockage within the drainage cavity 210. It should be noted that the third sac 230 can also protrude beyond the larger diameter end of the guide member 200. In this way, when the larger diameter end of the guide member 200 is in contact with the inner wall of the chest cavity, the expansion of the third sac 230 can disengage the guide member 200 from the inner wall of the chest cavity, preventing the inner wall of the chest cavity from blocking the guide member 200.

[0127] Fifth embodiment

[0128] The first to fourth embodiments have effectively solved the problem of blockage at the drainage hole 130 and the first end of the drainage tube body 100. However, when a guide member 200 is provided at the first end of the drainage tube body 100 as in the fourth embodiment, the outer diameter of the guide member 200 is larger than the outer diameter of the drainage tube. This can easily damage the surgical incision when the first end of the drainage tube body 100 is removed from the patient's body. Furthermore, if the drainage tube body 100 moves after being inserted into the patient's chest cavity, it can damage the surgical incision. Therefore, it is necessary to fix the drainage tube body 100 in place. Moreover, the chest drainage tube body 100 needs to be replaced every 5-7 days, and each replacement can easily damage the surgical incision.

[0129] To achieve fixation between the drainage tube body 100 and the surgical incision, and to reduce damage to the surgical incision during replacement of the chest drainage tube body 100, this embodiment also proposes a chest drainage tube. This embodiment can be used in combination with any of the first to fourth embodiments, or it can be used alone.

[0130] Please refer to Figures 14 to 17 Specifically, this embodiment includes a limiting sac 300, the outer periphery of which can be fixed to the surgical incision, and the inner wall of which can be fixed to the outer wall of the drainage tube body 100, so as to achieve the fixation between the drainage tube body 100 and the surgical incision.

[0131] Please refer to Figures 14 to 17Regarding the structure of the limiting capsule 300, the limiting capsule 300 includes a cannula 310 and a sheath 320. The cannula 310 has a through hole 311 for the drainage tube body 100 to pass through. The limiting capsule 300 is used to fill with saline or air. The sheath 320 is sealed to the outer periphery of the cannula 310. When filled with fluid, the outer periphery of the sheath 320 forms a first annular groove 321. The cannula 310 can be made of a relatively hard material, while the sheath 320 can be made of an elastic material. In use, the skin around the surgical incision is secured within the first annular groove 321 to fix the sheath 320 to the surgical incision.

[0132] Further, please refer to Figure 16 and Figure 17 When the limiting sac 300 is filled with saline or air, the sac 320 is composed of an inner sac layer 322, an outer sac layer 323 and a side sac layer 324. The inner sac layer 322 and the outer sac layer 323 are respectively sealed and connected to the outer sides of both ends of the cannula 310. The side sac layer 324 is cylindrical, and its two ends are respectively sealed and connected to the inner sac layer 322 and the outer sac layer 323 to form an annular limiting sac cavity 330. The middle part of the side sac layer 324 is concave inward to form the first annular groove 321.

[0133] More specifically, in order to better fit the limiting capsule 300 with the surgical incision, when filled with saline or air, the lateral capsule layer 324 has an inner protrusion 325 and an outer protrusion 326, with a recess 327 between the inner protrusion 325 and the outer protrusion 326. The inner protrusion 325, the outer protrusion 326 and the recess 327 are all arc-shaped, and the inner protrusion 325, the outer protrusion 326 and the recess 327 are connected by an arc transition.

[0134] In some implementations, in order to ensure the fixation between the limiting capsule 300 and the surgical incision, the outer side of the lateral capsule layer 324 is provided with anti-slip textures or anti-slip protrusions.

[0135] To facilitate the filling of saline or air into the limiting cavity 330, the sheath 320 is provided with an inlet 328, which is located on the side of the sheath 320 away from the drainage hole 130; an openable inlet plug 329 is connected to the inlet 328. Specifically, the inlet 328 is located on the outer sheath 323. In use, the inner sheath 322 is located inside the patient's body, the outer sheath 323 is located outside the patient's body, and the first annular groove 321 is engaged with the skin at the patient's surgical incision site.

[0136] On the other hand, to achieve a fixed connection between the limiting bladder 300 and the drainage tube, the limiting bladder 300 and the drainage tube body 100 can be integrally formed or connected by an interference fit. However, if the connection is made integrally or by an interference fit, the limiting bladder 300 and the drainage tube body 100 need to be disassembled together when replacing the drainage tube body 100. Therefore, in some preferred implementations, the outer diameter of the drainage tube body 100 at corresponding positions can be set to be slightly larger to allow for an interference fit connection with the limiting bladder 300; the outer diameter at other positions is smaller than the inner diameter of the sleeve 310. Of course, protruding rings or points can also be set on the corresponding sections of the drainage tube body 100; in order to further prevent axial movement between the sleeve 310 and the drainage tube body 100, a retaining ring 312 or a second retaining groove 313 that cooperates with each other can be set on the inner wall of the sleeve 310 and the corresponding position of the drainage tube body 100. For example, the retaining ring 312 can be set on the inner wall of the sleeve 310 and the second retaining groove 313 can be set at the corresponding position on the outer periphery of the drainage tube body 100; or the retaining ring 312 can be set at the corresponding position on the outer periphery of the drainage tube body 100 and the second retaining groove 313 can be set on the inner wall of the sleeve 310.

[0137] In use, the limiting bladder 300 is first fixed to the corresponding position of the drainage tube body 100. The drainage tube body 100 is then inserted into the patient's chest cavity through the surgical incision. The limiting bladder 300 is then fixed to the surgical incision, and air or saline solution is introduced, ensuring the inner bladder layer 322 is inside the patient's body, the outer bladder layer 323 is outside the patient's body, and the first annular groove 321 on the lateral bladder layer 324 is engaged at the surgical incision. When the drainage tube body 100 needs to be replaced, the limiting bladder 300 is kept fixed to the surgical incision, and the drainage tube body 100 is slowly withdrawn from the patient's chest cavity. A new drainage tube body 100 is then inserted into the patient's chest cavity through the inner hole of the cannula 310, and then moved to the appropriate position. This method reduces damage to the surgical incision during drainage tube body 100 replacement and avoids surgical incision tearing.

[0138] Sixth Embodiment

[0139] In the first to fifth embodiments, the problems of easy blockage at the port and drainage hole 130 of the first end of the drainage tube body 100 and the inconvenience of fixing the drainage tube body 100 to the surgical incision have been solved. However, in practical applications, when there are many impurities in the pleural effusion, it is also easy to cause blockage inside the drainage tube body 100, resulting in a slow drainage rate. For the part located outside the patient's body, an alcohol swab can be used to squeeze along the outer wall of the drainage tube body 100 and slide it from upstream to downstream to clear the blockage inside the drainage tube body 100. However, for the part located inside the patient's chest cavity, the blockage cannot be cleared in this way. Therefore, this embodiment proposes a chest drainage tube. This embodiment is an improvement based on any one of the first to fifth embodiments. The similarities will not be repeated, and only the differences will be explained below.

[0140] Please refer to Figures 18 to 20 In this embodiment, a fourth sac 180 is also included. The fourth sac 180 is disposed on the inner wall of the drainage tube body 100. There are multiple fourth sacs 180, which are distributed along the length of the drainage tube body 100. The fourth sacs 180 are distributed at least on the portion of the drainage tube body 100 located within the patient's thoracic cavity, or they may be distributed along the entire inner wall of the drainage tube body 100.

[0141] The function of the fourth bladder 180 is that when saline or air is filled into the fourth bladder 180, the fourth bladder 180 expands into the drainage tube body 100; when the saline or air is expelled from the fourth bladder 180, the fourth bladder 180 contracts into the wall of the drainage tube body 100, or becomes flush with the inner wall of the drainage tube body 100. By continuously controlling the expansion and contraction of the fourth bladder 180, the accumulated fluid in the drainage tube body 100 can be repeatedly squeezed and relaxed, which helps to clear any blockages in the drainage tube body 100.

[0142] In practical applications, to allow the fourth capsule 180 to be filled with saline or air, and to allow the saline or air to be expelled from the fourth capsule 180, a fourth channel 181 is provided, which is connected to the fourth capsule 180 and formed within the wall of the drainage tube body 100. The fourth channel 181 may be connected to the first channel 140 or the second channel 160, or it may be independently provided, that is, not connected to the first channel 140, the second channel 160, or the third channel 170.

[0143] The fourth capsule 180 is composed of a fourth groove 182 and a fourth capsule layer 183 disposed on the inner wall of the drainage tube body 100. The edge of the fourth capsule layer 183 is sealed and connected with the edge of the fourth groove 182 to form a fourth capsule cavity 184, which is connected to the fourth channel 181.

[0144] The fourth bladder 180 can be arranged in multiple rows in the circumferential direction of the drainage tube body 100, and can also be arranged in multiple loops in the length direction of the drainage tube body 100.

[0145] Please refer to Figure 18 and Figure 19 In specific implementation, the fourth bladder 180 can be connected to the same fourth channel 181, that is, all the fourth bladders 180 are controlled by the same external power component, and all the fourth bladders 180 expand or contract synchronously.

[0146] Please refer to Figure 20 In some other embodiments, the fourth bladder 180 may also be connected by multiple fourth channels 181 to achieve asynchronous control of the fourth bladder 180, that is, some of the fourth bladders 180 are inflated while others are contracted. For example, multiple unblocking zones 190 are continuously provided along the length of the drainage tube body 100, each unblocking zone 190 has two to four unblocking units 191, and each unblocking unit 191 has at least one fourth bladder 180. The fourth bladders 180 in different unblocking units 191 within the same unblocking zone 190 are connected to different fourth channels 181. Within each unblocking zone 190, there is a corresponding expansion and contraction cycle. Along the direction from upstream to downstream, the phase difference between adjacent unblocking units 191 is the same. The product of the time interval between adjacent unblocking units 191 and the number of unblocking units 191 in a unblocking zone 190 is one expansion and contraction cycle. For example, if the number of unblocking units 191 in each unblocking zone 190 is four, then the time difference between two adjacent unblocking units 191 is one-quarter of the expansion and contraction cycle. By controlling the expansion and contraction of the fourth bladder 180 according to this rule, and in conjunction with the pressure difference between the first and second ends of the drainage tube body 100, a peristaltic effect can be generated, thereby continuously expelling the accumulated fluid and its internal debris, preventing the debris in the accumulated fluid from clogging the drainage tube body 100.

[0147] In use, after the drainage tube body 100 is inserted into the patient's pleural cavity and fixed, all the fourth sacs 180 are controlled to expand and contract synchronously and repeatedly, or the fourth sacs 180 can be controlled asynchronously in the manner described above. This allows the fourth sacs 180 within the drainage tube body 100 to expand and contract repeatedly, facilitating the smooth drainage of mucous membranes and other debris, and preventing mucous membranes and other debris from pleural effusion from clogging the drainage tube body 100.

[0148] Finally, it should be noted that those skilled in the art will understand that many technical details have been presented in the embodiments of the present invention to facilitate a better understanding of the invention. However, even without these technical details and various variations and modifications based on the above embodiments, the technical solutions claimed in the claims of the present invention can be substantially achieved. Therefore, in practical applications, various changes in form and detail can be made to the above embodiments without departing from the spirit and scope of the present invention.

Claims

1. A chest drainage tube, characterized in that, The chest drainage tube comprises: a drainage tube body (100) having a drainage channel (120); an outer periphery of one end of the drainage tube body (100) is provided with a drainage hole (130); a first capsule (110) arranged at a wall of the drainage hole (130), the first capsule (110) having at least two working states: in a first working state, the first capsule (110) protrudes towards a center line of the drainage hole (130); in a second working state, the first capsule (110) does not protrude from the wall of the drainage hole (130); a first channel (140) arranged in a wall of the drainage tube body (100) and in communication with the first capsule (110); fluid is filled into or extracted from the first capsule (110) through the first channel (140), so that the first capsule (110) can be switched between the first working state and the second working state; a fourth capsule (180) fixedly formed on an inner wall of the drainage tube body (100); the fourth capsule (180) can protrude into the drainage channel (120) when fluid is filled and recess into the inner wall of the drainage tube body (100) when fluid is extracted; the number of the fourth capsules (180) is multiple; a fourth channel (181) formed in the wall of the drainage tube body (100) and in communication with the fourth capsule (180) to fill fluid into or extract fluid from the fourth capsule (180); a plurality of unblocking areas 190 are continuously arranged along the length direction of the drainage tube body (100), each of the unblocking areas (190) has two to four unblocking units (191), each of the unblocking units (191) has at least one fourth capsule (180), the fourth capsules (180) in different unblocking units (191) in the same unblocking area (190) are connected to different fourth channels (181); in each of the unblocking areas (190), corresponding to one expansion and contraction cycle, the phase difference between adjacent unblocking units (191) in the direction from upstream to downstream is the same; and the product of the time interval between adjacent unblocking units (191) and the number of unblocking units (191) in one unblocking area (190) is one expansion and contraction cycle.

2. The chest drainage tube according to claim 1, wherein the first capsule (110) is annular and arranged along the wall of the corresponding drainage hole (130).

3. The chest drainage tube of claim 1, wherein, Further comprising: a second capsule (150) arranged at an edge of an outer end of the drainage hole (130); the second capsule (150) can protrude from the outer periphery of the drainage tube body (100) and / or protrude from the inner wall of the drainage hole (130) towards the center line of the drainage hole (130) in a state of being filled with fluid.

4. A chest drainage tube according to claim 3, characterised in that, Further comprising: a second channel (160) in communication with the second capsule (150) to fill or extract fluid into or from the second capsule (150) through the second channel (160); after the fluid in the second capsule (150) is extracted, the second capsule (150) does not protrude from the outer wall of the drainage tube body (100) and is recessed into the wall of the drainage hole (130).

5. A chest drainage tube according to claim 4, characterised in that, The second channel (160) is in communication with the first channel (140).

6. A chest drainage tube according to any one of claims 1-5, characterised in that, Further comprising, a flow guide (200) connected to one end of the drainage tube body (100) near the drainage hole (130); the flow guide (200) has a flow guide cavity (210) therein, the flow guide cavity (210) is in communication with the drainage channel (120); the cross-sectional area of the flow guide cavity (210) gradually increases in the direction away from the drainage tube body (100); The flow guide (200) is provided with a third capsule (230) on the wall near the flow guide cavity (210); the third capsule (230) can protrude towards the side near the flow guide cavity (210) when filled with fluid.

7. A chest drainage tube according to claim 6, characterised in that, The number of the third capsule (230) is at least two, and the third capsule (230) is uniformly distributed around the center line of the flow guide (200).

8. The chest drainage tube of claim 6, wherein, Further comprising, a third channel (170) formed in the wall of the drainage tube body (100) and in communication with the third capsule (230) to fill or extract fluid into or from the third capsule (230) through the third channel (170).

9. The chest drainage tube of claim 6, wherein, The third capsule (230) is composed of a flow guide body (240) and a capsule wall (250), and the capsule wall (250) is located on the side of the flow guide body (240) near the flow guide cavity (210); A cavity is formed between the capsule wall (250) and the flow guide body (240); the thickness of the capsule wall (250) is less than the thickness of the flow guide body (240).

10. The chest drainage tube according to any one of claims 1-5, further comprising a limiting capsule (300). The limiting capsule (300) comprises a sleeve (310) and a capsule cover (320). The sleeve (310) has a through hole (311) for the drainage tube body (100) to pass through. The capsule cover (320) is sealingly connected to the outer periphery of the sleeve (310), and the outer periphery of the capsule cover (320) is formed with a first annular clamping groove (321) in the state of being filled with fluid.

11. The chest drainage tube according to claim 10, wherein the capsule cover (320) is provided with an inlet hole (328) located on the side of the capsule cover (320) away from the drainage hole (130); and an openable inlet hole plug (329) is connected at the inlet hole (328).

12. The chest drainage tube according to claim 10, wherein the groove wall of the first annular clamping groove (321) is provided with anti-slip protrusions. ​ ​ ​

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