Drainage tube for chest

Abstract

The application discloses a chest drainage tube, comprising: a drainage double tube, including a first tube body and a second tube body, the drainage double tube including a tearable section near a head end, the tearable section being connected with the first tube body and the second tube body in parallel through a weak adhesive or a pre-cut structure, and the first tube body and the second tube body being separable, and a part of the first tube body and the second tube body being separated being bent and deformed to a side away from the second tube body, the chest drainage tube being simple in structure, capable of realizing sufficient drainage of liquid and gas in a chest cavity without increasing the number and size of a patient's wound, reducing drainage time, reducing the pain and discomfort of the patient, and reducing the hospitalization time.

Description

Technical Field

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

[0002] Closed thoracic drainage surgery requires placing the inner end of the drainage tube in the area of ​​pleural effusion or pneumothorax within the pleural cavity, while the outer end of the drainage tube should be positioned lower than the inner end. Gravity is used to drain the pleural effusion. During closed thoracic drainage surgery, it is essential to maintain the airtightness of the pleural cavity at all times.

[0003] In existing technologies, the pleural cavity is a negative pressure cavity structure, and single-lumen drainage often results in insufficient drainage. Furthermore, since air in the pleural cavity is concentrated at the higher part of the cavity, while effusion is concentrated at the lower part, during the outward drainage process using a drainage tube, the accumulated air and effusion can only be drained separately by changing the position of the drainage tube, which increases the time the drainage tube is in place. This process is more harmful to the patient, takes longer, causes pain and discomfort, delays lung tissue recovery, and increases hospitalization time. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a chest drainage tube with a simple structure that can achieve adequate drainage of pleural effusion and pneumothorax without increasing the number and size of the patient's wounds, thereby reducing drainage time, reducing patient pain and discomfort, and shortening hospital stay.

[0005] To achieve the above objectives, an embodiment of the present invention provides a chest drainage tube comprising: a dual drainage tube, including a first tube body and a second tube body, the dual drainage tube including a tearable section near the head end, the tearable section being connected side-by-side to the first tube body and the second tube body in a separable manner through a weak adhesive or pre-cut structure, the portion of the first tube body separated from the second tube body being bent and deformed toward the side away from the second tube body.

[0006] According to an embodiment of the present invention, the chest drainage tube has a simple structure and can achieve sufficient drainage of pleural effusion and pneumothorax without increasing the number and size of the patient's wounds, thereby reducing drainage time, reducing patient pain and discomfort, and shortening hospital stay.

[0007] In addition, the chest drainage tube according to the above embodiments of the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the first tube is made of an elastic material and has pre-formed bending memory, and a tear line for triggering the separation of the tearable section is provided between the first tube and the second tube; and / or, the first tube has a circular cross-section, the second tube has a concave arc cross-section, and the first tube is embedded in the concave arc surface of the second tube.

[0009] According to one embodiment of the present invention, the first tube body includes a pull wire assembly, which is used to assist in separating the first tube body from the second tube body and to control the bending and fixing of the first tube body.

[0010] According to one embodiment of the present invention, the pull wire assembly includes a first pull wire and a second pull wire.

[0011] The first tube body is provided with a first pull wire hole and a second pull wire hole. The first pull wire is introduced from the inlet at the tail end of the first tube body, then led out from the first pull wire hole, then enters the second pull wire hole and is led out from the inlet.

[0012] The first tube body is provided with a third pull wire hole and a fourth pull wire hole. The second pull wire is introduced from the inlet at the tail end of the first tube body, then led out from the third pull wire hole, then enters the fourth pull wire hole and is led out from the inlet.

[0013] Wherein, the distance between the first pull-wire hole and the first tube head is less than the distance between the third pull-wire hole and the first tube head, the distance between the second pull-wire hole and the first tube head is less than the distance between the fourth pull-wire hole and the first tube head, and the distance between the third pull-wire hole and the first tube head is less than the distance between the second pull-wire hole and the first tube head.

[0014] According to one embodiment of the present invention, the first tube has a circular cross-section and the second tube has a concave arc cross-section, with the first tube embedded in the concave arc surface of the second tube.

[0015] According to one embodiment of the present invention, a partition structure is provided inside the cavity of the second tube body. The partition structure is a longitudinal diaphragm extending along the long axis of the second tube body, and the partition structure divides the inner cavity of the second tube body into a flushing cavity and an air cavity.

[0016] According to one embodiment of the present invention, the chest drainage tube further includes a connecting seat, the connecting seat including a first connector, a second connector and a third connector, the first connector being insertable into the lumen of the first tube body and cooperating with the first tube body, the second connector being insertable into the air cavity of the second tube body and cooperating with the second tube body, and the third connector being insertable into the irrigation cavity and cooperating with the second tube body.

[0017] According to one embodiment of the present invention, a mark is provided on the outer peripheral wall of the connector;

[0018] And / or, the chest drainage tube further includes a fixation element that can secure the connector to the patient's body surface;

[0019] And / or, the third connector is a metal connector;

[0020] And / or, the length of the third connector is longer than the lengths of the first connector and the second connector.

[0021] According to one embodiment of the present invention, a first mating surface is formed on the side of the first tube facing the second tube, and a second mating surface is formed on the side of the second tube facing the first tube. The first mating surface and the second mating surface are mated and connected. Openings are provided on the first mating surface and the second mating surface.

[0022] According to one embodiment of the present invention, a plurality of first side holes are formed on the first mating surface at intervals along the length of the first tube body, and a plurality of second side holes are provided on the side of the first tube body opposite to the first mating surface at intervals along the length of the first tube body, the second side holes being located near the head end of the drainage dual tube.

[0023] Wherein, the number of openings in the first side hole is greater than the number of openings in the second side hole; and / or, the opening area of ​​the first side hole is greater than the opening area of ​​the second side hole.

[0024] According to one embodiment of the present invention, a plurality of third side holes are formed on the second mating surface at intervals along the length of the second tube body, and a plurality of fourth side holes are provided on the side of the second tube body opposite to the second mating surface at intervals along the length of the second tube body, the fourth side holes being located near the head end of the drainage double tube.

[0025] Wherein, the number of openings in the third side hole is greater than the number of openings in the fourth side hole; and / or, the opening area of ​​the third side hole is greater than the opening area of ​​the fourth side hole.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is an exploded view of a chest drainage tube according to an embodiment of the present invention;

[0029] Figure 2This is a schematic diagram of the structure of the drainage double tube according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure after a chest drainage tube is inserted into the lung according to an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional view of the two drainage tubes according to an embodiment of the present invention.

[0032] Figure label:

[0033] Chest drainage tube 100, drainage double tube 10, first tube body / day tube 1, first side hole 11, second side hole 12, fluid chamber 13, second tube body / month tube 2, irrigation chamber 21, air chamber 22, longitudinal diaphragm 23, third side hole 24, fourth side hole 25, connecting seat 4, first connector 41, second connector 42, third connector 43, snap groove 44, pull wire assembly 5, first pull wire 51, second pull wire 52, first pull wire hole 511, second pull wire hole 512, third pull wire hole 521, fourth pull wire hole 522, inlet 53, concave arc surface 26. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Closed thoracic drainage surgery requires placing the inner end of the drainage tube in the area of ​​pleural effusion or pneumothorax within the pleural cavity, while the outer end of the drainage tube should be positioned lower than the inner end. Gravity is used to drain the pleural effusion. During closed thoracic drainage surgery, it is essential to maintain the airtightness of the pleural cavity at all times.

[0038] In existing technologies, the pleural cavity is a negative pressure cavity structure, and single-lumen drainage often results in insufficient drainage. Furthermore, since air in the pleural cavity is concentrated at the higher part of the cavity, while effusion is concentrated at the lower part, during the outward drainage process using a drainage tube, the accumulated air and effusion can only be drained separately by changing the position of the drainage tube, which increases the time the drainage tube is in place. This process is more harmful to the patient, takes longer, causes pain and discomfort, delays lung tissue recovery, and increases hospitalization time.

[0039] Therefore, this invention provides a chest drainage tube 100 that can be connected side-by-side during intubation and can drain pleural effusion and pneumothorax separately at different heights after intubation. This avoids the increased costs associated with multiple drainage tubes, the physical pain caused by repeated intubation procedures, increased wound size, and delayed recovery time. During drainage, it ensures that both effusion and pneumothorax are adequately drained, reducing drainage time, ensuring drainage effectiveness, minimizing patient pain and discomfort, and shortening hospital stay.

[0040] The chest drainage tube 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0041] like Figures 1-4 As shown, the chest drainage tube 100 according to an embodiment of the present invention includes: a double drainage tube 10.

[0042] The drainage double tube 10 includes a first tube body 1 and a second tube body 2. The first tube body 1 and the second tube body 2 are detachably connected side by side. During the insertion process, the first tube body 1 and the second tube body 2 remain in a side-by-side connection. During the insertion and placement of the drainage tube, the drainage double tube 10 can be placed into the thoracic cavity at the same time. The patient does not need to have multiple drainage tubes placed separately, which reduces the wounds generated during the placement process and avoids the increased costs caused by placing multiple drainage tubes. At the same time, it avoids the physical pain caused by the patient having to undergo multiple placement operations, which affects the recovery time.

[0043] The drainage dual tube 10 includes a tearable section near its head. This tearable section, through a weak adhesive or pre-cut structure, allows the first tube body 1 and the second tube body 2 to be separably connected side-by-side. In other words, the drainage dual tube 10 can easily be separated from its side-by-side connection by tearing, thus separating the first tube body 1 and the second tube body 2. After separation, the first tube body 1 and the second tube body 2 can each perform different drainage functions.

[0044] The tearable section is positioned near the head end, allowing the head ends of the first tube 1 and the second tube 2 of the drainage double tube 10, which remain inside the pleural cavity, to be separated by tearing. After separation, the first tube 1 and the second tube 2 should drain fluid or air at different heights within the pleural cavity. The lower tube can drain fluid out of the pleural cavity, while the higher tube can drain air out of the pleural cavity. To create a height difference between the first tube 1 and the second tube 2, the separated portion of the first tube 1 is bent and deformed away from the second tube 2. After bending and deformation, the position of the first tube 1 is closer to the tail end of the drainage double tube 10 along its axial direction. The first tube 1 is positioned further away from the tail end of the drainage double tube 10 along its axial direction. The drainage double tube 10 is inserted into the pleural cavity from bottom to top, with the tail end of the drainage double tube 10 located at a lower position. The first tube 1, which is closer to the tail end, is positioned even lower in the pleural cavity and is mainly used for draining effusion. The second tube 2, which is positioned higher in the pleural cavity, is mainly used for draining pneumothorax. Thus, during the outward drainage process, the double-tube structure of the pleural drainage tube 100 ensures that both effusion and pneumothorax can be adequately drained, reducing drainage time, ensuring drainage effectiveness, reducing patient pain and discomfort, and shortening hospital stay.

[0045] Because the first tube 1 bends downwards within the pleural cavity for drainage, the contact area between the first tube 1 and the pleural effusion is larger. The pleural effusion can flow out of the pleural cavity fully and quickly through the drainage port on the first tube 1, reducing drainage time, improving drainage efficiency, reducing patient pain and discomfort, and shortening hospital stay.

[0046] According to an embodiment of the present invention, the chest drainage tube 100 has a simple structure and can achieve sufficient drainage of pleural effusion and pneumothorax without increasing the number and size of the patient's wounds, thereby reducing drainage time, reducing patient pain and discomfort, and shortening hospital stay.

[0047] In some embodiments, the first tube 1 is made of an elastic material and has a pre-formed bending memory, that is, when the first tube 1 is not subjected to external force, the first tube 1 will automatically return to a bent state in the shape of a pig's tail. During the connection between the first tube 1 and the second tube 2, the second tube 2 provides the first tube 1 with a force to maintain it in a straight state.

[0048] In some embodiments, the state switching between the first tube 1 and the second tube 2 is achieved by controlling the cancellation of the connection state between the first tube 1 and the second tube 2.

[0049] Specifically, a tear line is provided between the first tube 1 and the second tube 2 to trigger the separation of the tearable section. By pulling the tear line at the tail end of the chest drainage tube 100, the tearable section can be gradually and controllably separated from the head end of the chest drainage tube 100. The separated part of the first tube 1 and the second tube 2 bends and deforms into the pre-formed bending memory state of the first tube 1 under the elastic action of the first tube 1 itself.

[0050] In some embodiments, the first tube 1 cannot actively switch to a bent state through the elasticity of its own material. In this case, the first tube 1 needs to be passively bent and deformed by external force to switch to a bent state. In some embodiments, refer to Figure 2 and Figure 3 The first tube 1 includes a pull wire group 5, which is used to assist the separation of the first tube 1 from the second tube 2 and to control the bending and fixing of the first tube 1.

[0051] In some embodiments, such as Figure 2 and Figure 3 As shown, the pull wire group 5 includes a first pull wire 51 and a second pull wire 52. The first pull wire 51 can control the first tube 1 to complete the first stage of bending deformation. After the first pull wire 51 is pulled, the first tube 1 coils around once. The second pull wire 52 can control the first tube 1 to complete the second stage of bending deformation. After the second pull wire 52 is pulled, the first tube 1 coils around a second time. Furthermore, the pull wire group 5 may also include a third pull wire, a fourth pull wire, etc., which are not limited here.

[0052] By controlling the pulling distance of the first pull wire 51 and / or the second pull wire 52, the separation length and bending state of the first tube 1 and the second tube 2 can be controlled, thereby achieving controllable separation of the first tube 1.

[0053] Specifically, refer to Figure 2The first tube body 1 has a first pull wire hole 511 and a second pull wire hole 512. The first pull wire 51 is introduced from the inlet 53 at the tail end of the first tube body 1 and then led out from the first pull wire hole 511, then enters the second pull wire hole 512 and is led out from the inlet 53.

[0054] In some embodiments, the first pull wire 51 is connected end to end. During the process of pulling the first pull wire 51 outward, the first pull wire hole 511 and the second pull wire hole 512 approach each other and overlap each other, so that the first tube 1 bends and coils.

[0055] The first tube body 1 is provided with a third pull wire hole 521 and a fourth pull wire hole 522. The second pull wire 52 is introduced from the inlet 53 at the tail end of the first tube body 1, then led out from the third pull wire hole 521, then enters the fourth pull wire hole 522 and is led out from the inlet 53.

[0056] In some embodiments, the ends of the second pull wire 52 are connected. During the process of pulling the second pull wire 52 outward, the third pull wire hole 521 and the fourth pull wire hole 522 approach each other and overlap each other, so that the first tube 1 bends and coils.

[0057] The first pull wire 51 and the second pull wire 52 should be clearly marked to distinguish them. For example, the first pull wire 51 and the second pull wire 52 can be distinguished by different colored wires to ensure that the user pulls the first pull wire 51 first and then pulls the second pull wire 52.

[0058] To ensure that the first tube 1 first makes a small loop and then a large loop during the pulling process, and to achieve controllable separation length between the first tube 1 and the second tube 2, refer to... Figure 2 The distance between the first pull hole 511 and the head end of the first tube 1 is less than the distance between the third pull hole 521 and the head end of the first tube 1. The distance between the second pull hole 512 and the head end of the first tube 1 is less than the distance between the fourth pull hole 522 and the head end of the first tube 1. The distance between the third pull hole 521 and the head end of the first tube 1 is less than the distance between the second pull hole 512 and the head end of the first tube 1. Therefore, when the first pull hole 511 and the second pull hole 512 overlap, it will not affect the overlap between the third pull hole 521 and the fourth pull hole 522.

[0059] In some embodiments, such as Figure 1 and Figure 3 As shown, the chest drainage tube 100 also includes a connecting seat 4, which has a snap-fit ​​groove 44. The first pull wire 51 and the second pull wire 52 can be wrapped around the snap-fit ​​groove 44 for fixation. The snap-fit ​​can engage with the snap-fit ​​groove 44 to further fix the pull wires. After the pull wires are fixed, the first tube 1 inside the chest cavity is fixedly curled into a pig tail shape, "hooking" the chest wall, effectively preventing the tube from dislodging.

[0060] Reference Figures 1-4The first tube 1 has a circular cross-section, and the second tube 2 has a concave arc cross-section. The first tube 1 is embedded in the concave arc surface 26 of the second tube 2. The first tube 1 and the second tube 2 are respectively set as the day tube 1 with a circular cross-section and the month tube 2 with a concave arc cross-section. On the one hand, this can reduce the cross-sectional area of ​​the drainage tube 10, avoid excessive wounds during insertion, increase patient pain, and increase recovery time. On the other hand, it can reduce the sharpness of the outer surface of the drainage tube 10, reduce the cutting damage to human tissue by the corners of the drainage tube 10 during insertion. Furthermore, the greater structural difference can also help medical staff distinguish between different tubes during insertion. The first tube 1 with a circular cross-section is more flexible and easier to bend in the chest cavity, while the second tube 2 with a concave arc cross-section is stronger and less prone to deformation, which is more conducive to improving the strength of the drainage tube 10 and facilitating insertion into human tissue.

[0061] In some embodiments, the second tube 2, whose cross-section is formed into a concave arc, is provided with a drainage hole in the concave arc. When the second tube 2 is wrapped by tissue, the drainage hole located in the concave arc can remain open, thus avoiding the drainage hole from being blocked by tissue.

[0062] In some embodiments, when the first tube 1 is wrapped by tissue, the drainage hole located on the inner side of the surrounding first tube 1 will not be blocked by the tissue wrapping, ensuring that the chest drainage tube 100 can drain smoothly outward.

[0063] According to one embodiment of the present invention, the traditional single-lumen tube only supports unidirectional drainage. For cases such as empyema that require pleural lavage, it is necessary to introduce the fluid into the pleural cavity through the drainage tube, and then drain the introduced fluid through the drainage tube after sufficient fluid has been introduced. During this process, the pleural cavity pressure changes significantly, and it is difficult to lavage thoroughly.

[0064] Therefore, in this embodiment of the invention, an irrigation chamber 21 is added inside the second tube 2. Medical staff can use the irrigation chamber 21 to infuse irrigation fluid into the patient's pleural cavity. Through the process of infusing irrigation fluid, the patient's pleural cavity can be thoroughly irrigated.

[0065] Specifically, such as Figure 4 As shown, a partition structure is provided inside the cavity of the second tube 2. The partition structure is a longitudinal diaphragm 23 extending along the long axis of the second tube 2. The partition structure divides the inner cavity of the second tube 2 into a flushing cavity 21 and an air cavity 22.

[0066] The rinsing fluid enters the pleural cavity through the rinsing chamber 21 and flows downward under the influence of gravity, thoroughly rinsing the pleural cavity. It then mixes with the pleural effusion, which often forms fibrinous exudate that can cause blockage of the lumen or the side holes of the tubing. The rinsing fluid can reduce the viscosity of the effusion, prevent blockage of the lumen, and facilitate the drainage of the effusion.

[0067] The pleural effusion can be drained in time through the first tube 1. That is, the rinsing fluid delivered to the pleural cavity by the rinsing chamber 21 can be drained in time after entering the pleural cavity. The pressure in the pleural cavity will not be affected by the rinsing process, and the rinsing time, the catheterization time, and the patient's pain are reduced.

[0068] Since the outlet of the irrigation chamber 21 is located at the high position of the thoracic cavity after intubation, and the first tube body 1 is located at the low position of the thoracic cavity after intubation, comprehensive irrigation of the thoracic cavity from top to bottom can be achieved, ensuring the irrigation effect.

[0069] The flushing chamber 21 occupies only a small part of the lumen of the second tube 2, with a cross-sectional diameter between 1mm and 2mm. The cross-sectional area of ​​the air chamber 22 is much larger than that of the flushing chamber 21 to ensure that there is enough space in the second tube 2 for sufficient air exhaust and to avoid the flushing chamber 21 affecting the drainage effect of the chest drainage tube 100.

[0070] like Figure 1 As shown, the chest drainage tube 100 also includes a connecting seat 4, which includes a first connector 41, a second connector 42 and a third connector 43. The first connector 41, the second connector 42 and the third connector 43 are respectively used to cooperate with different cavities of the drainage double tube 10 for drainage into or out of the drainage double tube 10.

[0071] The first connector 41 can be inserted into the cavity of the first tube 1 and connected with the first tube 1; the second connector 42 can be inserted into the air cavity 22 of the second tube 2 and connected with the second tube 2; and the third connector 43 can be inserted into the flushing cavity 21 and connected with the second tube 2.

[0072] In some embodiments, since most of the drainage tubes 10 are inserted into the patient's body, in order to avoid the position of the first tube 1 and the second tube 2 being twisted, and to clarify the relative positions of the first tube 1 and the second tube 2 in the thoracic cavity, a mark is provided on the outer peripheral wall of the connecting seat 4. Medical staff can control the intubation and drainage operations by observing the actual position of the mark, so as to ensure the accuracy of the operation.

[0073] In some embodiments, the chest drainage tube 100 further includes a fixing member that can fix the connecting seat 4 to the patient's body surface to prevent the patient from moving, causing the chest drainage tube 100 to detach from the patient's body or twist inside the patient's body, affecting the drainage effect and causing secondary injury to the patient.

[0074] Because the cross-sectional area of ​​the flushing chamber 21 is small, that is, the cavity of the flushing chamber 21 is thin, the process of the third connector 43 being inserted and mated with the flushing chamber 21 is more complicated and more difficult to control. Therefore, the third connector 43 should be made of a harder material to avoid damage to the thin structure of the third connector 43 under external force, and to increase the convenience of insertion and mating.

[0075] Specifically, the third connector 43 is a metal connector, which uses metal material to increase the structural strength and hardness of the third structure, so as to improve the convenience of inserting the third connector 43 into the flushing chamber 21 during the process of the drainage double tube 10 and the connecting seat 4.

[0076] Furthermore, refer to Figure 1 The length of the third connector 43 is longer than that of the first connector 41 and the second connector 42. During the process of connecting the connector 4 and the drainage double tube 10, the third connector 43 first engages with the flushing chamber 21. Since the cross-sectional area of ​​the flushing chamber 21 is small, the engagement between the flushing chamber 21 and the third connector 43 is prone to misalignment. By first engaging the third connector 43 with the flushing chamber 21, the stability and accuracy of the engagement between the third connector 43 and the flushing chamber 21 can be ensured before controlling the engagement between the first connector 41 and the second connector 42 with the chamber. This reduces the difficulty of engagement and improves the convenience of inserting the third connector 43 into the flushing chamber 21.

[0077] In some embodiments, the first tube 1 and the second tube 2 are integrated at the end and the air chambers in the tubes are connected. The two are merged into a single tube segment with a circular cross-section. Thus, the connecting seat can merge the first connector and the second connector, which facilitates the connection between the connecting seat and the drainage double tube 10. The connecting seat may have only two connectors, one of which is used for drainage and the other is used for flushing.

[0078] In some embodiments, such as Figure 2 As shown, a first mating surface is formed on the side of the first tube 1 facing the second tube 2, and a second mating surface is formed on the side of the second tube 2 facing the first tube 1. The first mating surface and the second mating surface are connected. Specifically, the cross-section of the first tube 1 is circular, and the cross-section of the second tube 2 is concave arc-shaped. The first tube 1 is embedded in the concave arc surface 26 of the second tube 2, and the embedded area is connected by weak adhesion. The glued part on the first tube 1 forms the first mating surface, and the glued part on the second tube 2 forms the second mating surface.

[0079] The first mating surface and the second mating surface are provided with openings.

[0080] Specifically, in some embodiments, such as Figure 2As shown, a plurality of first side holes 11 are formed on the first mating surface at intervals along the length of the first tube body 1. Existing drainage tubes require medical staff to trim them themselves based on experience and different drainage locations to create drainage holes in appropriate positions. However, since the medical staff cannot ensure the size of the drainage hole or the smoothness of the drainage opening after trimming, the drainage effect of the drainage tube is not only uncontrollable, but may also cause harm to the patient.

[0081] By setting the first side hole 11, the number of openings of the first side hole 11 can be controlled by controlling the controllable tearing separation between the first tube body 1 and the second tube body 2. Since the tearing separation position between the first tube body 1 and the second tube body 2 must be inside the thoracic cavity, the opening of the first side hole 11 must also be located inside the thoracic cavity, so that problems such as subcutaneous air accumulation or air leakage outside the thoracic cavity will not occur.

[0082] Since the tearing length of the first tube 1 is long enough, that is, the first tube 1 has a sufficient length of first side holes 11, the first tube 1 has enough first side holes 11 to participate in the drainage of accumulated liquid, which improves the drainage efficiency.

[0083] And / or, a plurality of third side holes 24 are formed on the second mating surface at intervals along the length of the second tube body 2. In some embodiments, the third side holes 24 and the first side holes 11 are positioned corresponding to each other before tearing, so that gas or liquid can flow between the first tube body 1 and the second tube body 2, thereby improving drainage efficiency.

[0084] The existing drainage tubes require medical staff to trim them themselves based on experience and different drainage locations to create a suitable drainage hole. However, since medical staff cannot guarantee the size of the drainage hole or the smoothness of the drainage opening after trimming, the drainage effect of the drainage tube is uncontrollable and may also cause harm to the patient.

[0085] By setting the third side hole 24, the number of openings of the third side hole 24 can be controlled by controlling the controllable tearing separation between the first tube 1 and the second tube 2. Since the tearing separation position between the first tube 1 and the second tube 2 must be inside the pleural cavity, the opening of the third side hole 24 must also be located inside the pleural cavity, thus preventing problems such as subcutaneous air accumulation or air leakage outside the pleural cavity.

[0086] Since the tearing length of the first tube 1 is long enough, that is, the second tube 2 has a sufficient length of third side holes 24, the second tube 2 has enough third side holes 24 to participate in the drainage of accumulated gas, which improves the drainage efficiency.

[0087] Fibrinous exudate often forms in the pleural cavity, causing blockage of the lumen or the side holes of the tube. Sufficient side holes involved in drainage can also prevent the problem of lumen blockage.

[0088] In some embodiments, the first tube 1 is provided with a plurality of second side holes 12 spaced apart along the length of the first tube 1 on the side opposite to the second tube 2. The second side holes 12 are located near the head end of the drainage double tube 10. Since the second side holes 12 are always open, the number of openings of the first side holes 11 is greater than the number of openings of the second side holes 12, so as to avoid the second side holes 12 being located outside the chest cavity after tube placement, causing problems such as subcutaneous air accumulation or air leakage. Furthermore, the opening area of ​​the first side holes 11 is greater than the opening area of ​​the second side holes 12 to improve drainage efficiency.

[0089] In some embodiments, the second tube 2 is provided with a plurality of fourth side holes 25 spaced apart along the length of the second tube 2 on the side opposite to the first tube 1. The fourth side holes 25 are located near the head end of the drainage double tube 10. Since the fourth side holes 25 are always open, the number of openings of the third side holes 24 is greater than the number of openings of the fourth side holes 25, so as to avoid the fourth side holes 25 being located outside the chest cavity after tube placement, causing problems such as subcutaneous air accumulation or air leakage. Furthermore, the opening area of ​​the third side holes 24 is greater than the opening area of ​​the fourth side holes 25 to improve drainage efficiency.

[0090] In summary, the drainage double tube 10 uses a parallel composite structure of "day tube 1" and "month tube 2" to achieve a morphological fusion design. The "day tube 1", which has a more elastic cross-section and is circular, and the "month tube 2", which has a more rigid concave arc cross-section, are weakly bonded to form a composite tube body. This results in the outer diameter of the cross-section formed by the combination of the two tubes being reduced by more than 80% compared to the outer diameter of the traditional double tube cross-section, and the amount of trauma is smaller than that of the traditional double tube placement.

[0091] The first tube 1 and the second tube 2 employ a controllable separation mechanism, achieving in vivo separation of the tearable segment through weak bonding and / or pre-cutting. The separation length at the head end is relatively long, ensuring a stable height difference between the two tubes within the thoracic cavity. A two-stage suture system is used: the first suture 51 controls the pigtail-like primary bend, while the second suture 52 achieves secondary extended bends. The radius of curvature of the primary bend is smaller than that of the secondary extended bend, precisely locating the costophrenic angle. A shape memory alloy can be inserted into the first tube 1 for auxiliary positioning; for example, a nickel-titanium alloy wire can be embedded in the first tube 1, activating the bending memory effect through body temperature to enhance positioning stability.

[0092] The interior of the menstrual tube 2 is divided into a flushing chamber 21 and an air chamber 22 by a longitudinal diaphragm 23, enabling simultaneous drainage and flushing. In some embodiments, a miniature check valve can be configured in the flushing chamber 21 to prevent negative pressure imbalance. The flushing chamber 21, combined with pulsed flushing during drainage, reduces the risk of fibrin deposition. A dynamic opening is formed by the tearable first tube body 1 and the second tube body 2. Side holes are pre-formed on the contact surfaces of the day tube 1 and the menstrual tube 2, automatically exposing effective pore positions after separation, thus improving drainage efficiency.

[0093] A magnetic quick-connector can be provided between the connector 4 and the drainage tube 10, and the various cavities can be distinguished by different colors. For example, red represents the air cavity 22 defined by the second tube 2, yellow represents the irrigation cavity 21 defined by the second tube 2, and blue represents the fluid cavity 13 defined by the first tube 1. A mis-insertion prevention structure can also be designed to avoid connection errors. The chest drainage tube 100 can also integrate a miniature sensor for real-time display of intrathoracic pressure changes.

[0094] The tube surface can also be coated with a hydrophilic coating to reduce the coefficient of friction and reduce harm to patients. An antibacterial composite layer can also be applied to the tube surface to improve the antibacterial rate.

[0095] Compared with traditional single tubes, the chest drainage tube 100 of this invention can reduce the insertion time by half, improve the drainage adequacy rate by 30%, complete chest irrigation in one session without repeated operation, reduce the patient's general pain index, and reduce the extubation time by 50%.

[0096] The chest drainage tube 100 of this invention can be applied to complex hydropneumothorax, achieving simultaneous drainage during a single tube placement, and significantly improving the flow rates of both the air cavity 22 and the fluid cavity 13. It can also be used for empyema irrigation, enabling closed-loop irrigation, supporting continuous irrigation, and improving the clearance rate of fibrin in the pleural cavity. Furthermore, it can be used for postoperative lung re-expansion, dynamically adjusting negative pressure through a pressure monitoring module to shorten lung re-expansion time.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A chest drainage tube, characterized in that, include: The drainage double tube includes a first tube body and a second tube body. The drainage double tube includes a tearable section near the head end. The tearable section allows the first tube body and the second tube body to be separably connected side by side through a weak adhesive or pre-cut structure. The part of the first tube body that is separated from the second tube body is bent and deformed towards the side away from the second tube body. The first tube includes a pull wire assembly, which is used to assist in separating the first tube from the second tube and to control the bending and fixing of the first tube; The pull wire assembly includes a first pull wire and a second pull wire. The first tube body is provided with a first pull wire hole and a second pull wire hole. The first pull wire is introduced from the inlet at the tail end of the first tube body, then led out from the first pull wire hole, then enters the second pull wire hole and is led out from the inlet. The first tube body is provided with a third pull wire hole and a fourth pull wire hole. The second pull wire is introduced from the inlet at the tail end of the first tube body, then led out from the third pull wire hole, then enters the fourth pull wire hole and is led out from the inlet. Wherein, the distance between the first pull wire hole and the first tube head is less than the distance between the third pull wire hole and the first tube head, the distance between the second pull wire hole and the first tube head is less than the distance between the fourth pull wire hole and the first tube head, and the distance between the third pull wire hole and the first tube head is less than the distance between the second pull wire hole and the first tube head. The pull wire assembly achieves the separation of the first tube and the second tube within the thoracic cavity under external thoracic operation. By controlling the pulling distance of the first pull wire and / or the second pull wire, the separation length and bending state of the first tube and the second tube are controlled, thereby achieving controllable separation of the first tube. After the first tube and the second tube are separated in the pleural cavity, they are used to drain the effusion or gas at different heights in the pleural cavity. Wherein, the first tube is positioned at a lower height within the pleural cavity than the second tube; the first tube is used for drainage of fluid accumulation at a lower position within the pleural cavity, and the second tube is used for drainage of air accumulation at a higher position within the pleural cavity. The second tube body has a partition structure inside its cavity. The partition structure is a longitudinal diaphragm extending along the long axis of the second tube body. The partition structure divides the inner cavity of the second tube body into a flushing cavity and an air cavity. The outlet of the irrigation chamber is located at the high point of the thoracic cavity after intubation. The irrigation fluid enters the thoracic cavity through the irrigation chamber to irrigate the thoracic cavity and is discharged through the first tube. A connecting seat, comprising a first connector, a second connector, and a third connector, wherein the first connector can be inserted into the cavity of the first tube and connected to the first tube, the second connector can be inserted into the air cavity of the second tube and connected to the second tube, and the third connector can be inserted into the flushing cavity and connected to the second tube. The connector combines the first connector and the second connector, and the connector is connected to the drainage double tube. The connector has two connectors, one for drainage and the other for flushing.

2. The chest drainage tube according to claim 1, characterized in that, The first tube is made of an elastic material and has a pre-formed bending memory. A tear line is provided between the first tube and the second tube to trigger the separation of the tearable section. And / or, the first tube has a circular cross-section and the second tube has a concave arc cross-section, with the first tube embedded in the concave arc surface of the second tube.

3. The chest drainage tube according to claim 1, characterized in that, The outer peripheral wall of the connector is marked; And / or, the chest drainage tube further includes a fixation element that can secure the connector to the patient's body surface; And / or, the third connector is a metal connector; And / or, the length of the third connector is longer than the lengths of the first connector and the second connector.

4. The chest drainage tube according to claim 1, characterized in that, The first tube body has a first mating surface on the side facing the second tube body, and the second tube body has a second mating surface on the side facing the first tube body. The first mating surface and the second mating surface are connected to each other, and openings are provided on the first mating surface and the second mating surface.

5. The chest drainage tube according to claim 4, characterized in that, The first mating surface has a plurality of first side holes spaced apart along the length of the first tube. The side of the first tube facing away from the first mating surface has a plurality of second side holes spaced apart along the length of the first tube. These second side holes are located near the head end of the dual drainage tubes. Wherein, the number of openings in the first side hole is greater than the number of openings in the second side hole; and / or, the opening area of ​​the first side hole is greater than the opening area of ​​the second side hole.

6. The chest drainage tube according to claim 4, characterized in that, The second mating surface has a plurality of third side holes spaced apart along the length of the second tube. The side of the second tube facing away from the second mating surface has a plurality of fourth side holes spaced apart along the length of the second tube. These fourth side holes are located near the head end of the drainage double tube. Wherein, the number of openings in the third side hole is greater than the number of openings in the fourth side hole; and / or, the opening area of ​​the third side hole is greater than the opening area of ​​the fourth side hole.

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