Chest drainage tube

Abstract

The invention discloses a thoracic cavity drainage tube which comprises a drainage double tube, the drainage double tube comprises a first tube body and a second tube body, the drainage double tube comprises a tearing section close to the head end, and the tearing section enables the first tube body and the second tube body to be detachably connected side by side through a weak bonding or pre-cutting structure; the chest drainage tube has the advantages that the chest drainage tube is simple in structure, effusion and pneumatosis in the chest can be sufficiently drained without increasing the number and size of wounds of a patient, drainage time is shortened, pain and discomfort of the patient are relieved, and the chest drainage tube is high in practicability and suitable for popularization and application. The hospitalization time is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly, to a thoracic drainage tube. Background Art

[0002] In closed thoracic drainage surgery, the inner end of the drainage tube needs to be placed in the area of accumulated fluid or gas in the thoracic cavity, and the outer end of the drainage tube should be placed lower than the inner end height to drain the accumulated fluid in the thoracic cavity by gravity. During the process of closed thoracic drainage surgery, the airtightness of the thoracic cavity needs to be maintained at all times.

[0003] In the prior art, the pleural cavity is a negative pressure cavity structure. Single lumen drainage often has insufficient drainage. Moreover, since the gas in the thoracic cavity is concentrated at the upper part inside the thoracic cavity, and the accumulated fluid is concentrated at the lower part inside the thoracic cavity, during the process of draining outward using the drainage tube, the accumulated gas and fluid can only be drained out by changing the position of the drainage tube respectively, which increases the indwelling time of the drainage tube, causes great harm to the patient during the process, has a long operation time, causes pain and discomfort to the patient, delays the recovery of lung tissue, and increases the hospital stay. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a thoracic drainage tube, which has a simple structure and can achieve sufficient drainage of accumulated fluid and gas in the thoracic cavity without increasing the number and size of the patient's wounds, reduces the drainage time, reduces the pain and discomfort of the patient, and reduces the hospital stay.

[0005] To achieve the above object, according to an embodiment of the present invention, a thoracic drainage tube is provided, which includes: a drainage double tube, including a first tube body and a second tube body. The drainage double tube includes a tearable section near the head end. The first tube body and the second tube body are detachably connected side by side through a weak bonding or pre-cutting structure, and the separated part of the first tube body and the second tube body is bent and deformed away from the second tube body.

[0006] According to the thoracic drainage tube of the embodiment of the present invention, the thoracic drainage tube has a simple structure and can achieve sufficient drainage of accumulated fluid and gas in the thoracic cavity without increasing the number and size of the patient's wounds, reduces the drainage time, reduces the pain and discomfort of the patient, and reduces the hospital stay.

[0007] In addition, the thoracic drainage tube according to the above embodiment of the present invention may further have the following additional technical features:

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

[0009] According to an embodiment of the present invention, the first tube body includes a wire group, and the wire group is used to assist the separation of the first tube body from the second tube body and control the bending and fixing of the first tube body.

[0010] According to an embodiment of the present invention, the wire group includes a first wire and a second wire.

[0011] A first wire hole and a second wire hole are formed on the first tube body. The first wire is introduced from the inlet at the tail end of the first tube body, then led out from the first wire hole, and then enters the second wire hole and is led out from the inlet.

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

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

[0014] According to an embodiment of the present invention, the cross-section of the first tube body is circular, the cross-section of the second tube body is concave arc-shaped, and the first tube body is embedded in the concave arc surface of the second tube body.

[0015] According to an embodiment of the present invention, a partition structure is provided in the lumen 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 an embodiment of the present invention, the thoracic drainage tube further includes: a connection seat, and the connection seat includes a first joint, a second joint and a third joint. The first joint can be inserted into the lumen of the first tube body to be connected with the first tube body in a matching manner, the second joint can be inserted into the air cavity of the second tube body to be connected with the second tube body in a matching manner, and the third joint can be inserted into the flushing cavity to be connected with the second tube body in a matching manner.

[0017] According to an embodiment of the present invention, a mark is provided on the outer peripheral wall of the connection seat.

[0018] And / or, the chest drainage tube further comprises a fixing member, and the fixing member is capable of fixing the connecting seat to the patient's body surface;

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

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

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

[0022] According to an embodiment of the present invention, a plurality of first side holes are formed on the first mating surface and are arranged at intervals in the length direction of the first tube body, and a plurality of second side holes are arranged at intervals in the length direction of the first tube body on a side of the first tube body away from the first mating surface, and the second side holes are arranged near the head end of the drainage double tube.

[0023] Wherein, the number of openings of the first side hole is greater than the number of openings of 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 an embodiment of the present invention, a plurality of third side holes are formed on the second mating surface and are arranged at intervals in the length direction of the second tube body, and a plurality of fourth side holes are arranged at intervals in the length direction of the second tube body on a side of the second tube body away from the second mating surface, and the fourth side holes are arranged near the head end of the drainage double tube.

[0025] The number of openings of the third side hole is greater than the number of openings of 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 present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0031] Figure 4 It is a cross - sectional view of the double - tube drainage according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Thoracic drainage tube 100, double - tube drainage 10, first tube body / day tube 1, first side hole 11, second side hole 12, liquid cavity 13, second tube body / month tube 2, flushing cavity 21, air cavity 22, longitudinal diaphragm 23, third side hole 24, fourth side hole 25, connecting seat 4, first joint 41, second joint 42, third joint 43, snap - groove 44, wire - pulling group 5, first wire 51, second wire 52, first wire - pulling hole 511, second wire - pulling hole 512, third wire - pulling hole 521, fourth wire - pulling hole 522, inlet 53, concave arc surface 26. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] In the description of the present 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", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Closed thoracic drainage surgery requires placing the inner end of the drainage tube in the area of accumulated fluid or gas in the thoracic cavity. The outer end of the drainage tube should be placed lower than the inner end height to drain the accumulated fluid in the thoracic cavity by gravity. During the closed thoracic drainage surgery, the airtightness of the thoracic cavity needs to be maintained at all times.

[0038] In the prior art, the pleural cavity is a negative pressure cavity structure. Single lumen drainage often has the situation of insufficient drainage. Moreover, since the gas in the thoracic cavity is concentrated at the upper part inside the thoracic cavity and the accumulated fluid is concentrated at the lower part inside the thoracic cavity, during the process of draining outward using the drainage tube, the accumulated gas and fluid can only be drained out separately by changing the position of the drainage tube, which increases the time of indwelling the drainage tube, causes great harm to the patient during the process, has a long operation time, causes pain and discomfort to the patient, delays the recovery of lung tissue, and increases the length of hospital stay.

[0039] Therefore, the embodiment of the present invention designs a thoracic drainage tube 100 that can be connected side by side during the intubation stage and can separately drain the accumulated fluid and gas in the thoracic cavity at different heights after intubation. Thus, during the process of indwelling the drainage tube, the problem of increased cost caused by indwelling multiple drainage tubes is avoided, the physical pain caused by the patient undergoing multiple indwelling operations is avoided, the problem of increasing the wound and affecting the recovery time is avoided. During the process of draining outward, it is ensured that both the accumulated fluid and gas can be fully drained, the drainage time is reduced, the drainage effect is ensured, the pain and discomfort of the patient are reduced, and the length of hospital stay is reduced.

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

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

[0042] Among them, the double - tube drainage device 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 intubation process, the first tube body 1 and the second tube body 2 remain in the side - by - side connection state. During the process of indwelling the drainage tube, the double - tube drainage device 10 can be indwelled into the thoracic cavity simultaneously. The patient does not need to indwell multiple drainage tubes separately, which reduces the wound generated during the indwelling process, also avoids the problem of increased cost caused by indwelling multiple drainage tubes, and at the same time avoids the physical pain caused by the patient undergoing multiple indwelling operations, which affects the recovery time.

[0043] The double - tube drainage device 10 includes a tear - off section near the head end. The tear - off section enables the first tube body 1 and the second tube body 2 to be detachably connected side by side through a weak bonding or pre - cutting structure. That is to say, the double - tube drainage device 10 can be conveniently changed from the first state of side - by - side connection to a separated state by tearing, canceling the connection relationship between the first tube body 1 and the second tube body 2, so that the first tube body 1 and the second tube body 2 are separated. After separation, the first tube body 1 and the second tube body 2 can perform different drainage functions respectively.

[0044] The tear - off section is arranged near the head end. Thus, the parts of the first tube body 1 and the second tube body 2 of the double - tube drainage device 10 indwelled at the head end inside the thoracic cavity can be separated by tearing. After the first tube body 1 and the second tube body 2 are separated, they should drain the effusion or gas at different height positions inside the thoracic cavity respectively. The tube body located at the lower position can drain the effusion out of the thoracic cavity, while the tube body located at the higher position can drain the gas out of the thoracic cavity. In order to create a height difference between the first tube body 1 and the second tube body 2, the separated part of the first tube body 1 and the second tube body 2 bends and deforms towards the side away from the second tube body 2. After bending and deforming, the position of the first tube body 1 is closer to the tail end of the double - tube drainage device 10 in the axial direction of the double - tube drainage device 10, while the position of the second tube body 2 is farther from the tail end of the double - tube drainage device 10 in the axial direction of the double - tube drainage device 10. The double - tube drainage device 10 is inserted into the thoracic cavity from bottom to top, and the tail end of the double - tube drainage device 10 is located at a lower position. The first tube body 1 closer to the tail end has a lower height position inside the thoracic cavity, and the first tube body 1 is mainly used for draining effusion inside the thoracic cavity. The second tube body 2 has a higher height position inside the thoracic cavity, and the second tube body 2 is mainly used for draining gas inside the thoracic cavity. Thus, during the outward drainage process, the double - tube structure of the thoracic cavity drainage tube 100 ensures that both the effusion and the gas can be fully drained, reduces the drainage time, ensures the drainage effect, reduces the pain and discomfort of the patient, and shortens the hospital stay.

[0045] Since the first tube body 1 bends downward for drainage inside the thoracic cavity, the contact area between the first tube body 1 and the effusion inside the thoracic cavity is larger. The effusion inside the thoracic cavity can flow out of the thoracic cavity fully and quickly through the drainage openings provided on the first tube body 1, reducing the drainage time, improving the drainage efficiency, reducing the pain and discomfort of the patient, and shortening the hospital stay.

[0046] The thoracic drainage tube 100 according to an embodiment of the present invention has a simple structure, and can fully drain the accumulated fluid and gas in the chest cavity without increasing the number and size of the patient's wounds, reducing the drainage time, reducing the pain and discomfort of the patient, and shortening the hospital stay.

[0047] In some embodiments, the first tube body 1 is made of an elastic material and prefabricated with a bending memory. That is, when there is no external force acting on the first tube body 1, the first tube body 1 will automatically return to the bent state of being bent into a pig-tail shape. During the connection process of the first tube body 1 and the second tube body 2, the second tube body 2 provides a force for the first tube body 1 to maintain in a straight state.

[0048] In some embodiments, the state switch between the first tube body 1 and the second tube body 2 is achieved by canceling the connection state between the first tube body 1 and the second tube body 2.

[0049] Specifically, a tear line for triggering the separation of the tearable section is provided between the first tube body 1 and the second tube body 2. By pulling the tear line at the tail end of the thoracic drainage tube 100, the tearable section can be gradually and controllably separated from the head end of the thoracic drainage tube 100. The separated part of the first tube body 1 and the second tube body 2 bends and deforms towards the prefabricated bending memory state of the first tube body 1 under the elastic action of the first tube body 1 itself.

[0050] In some embodiments, the first tube body 1 cannot actively switch to the bent state through the elasticity of its own material. At this time, the first tube body 1 needs to be bent and deformed passively under the action of an external force to switch to the bent state. In some embodiments, referring to Figure 2 and Figure 3 , the first tube body 1 includes a wire group 5, and the wire group 5 is used to assist the separation of the first tube body 1 and the second tube body 2 and control the bending and fixing of the first tube body 1.

[0051] In some embodiments, as shown in Figure 2 and Figure 3 , the wire group 5 includes a first wire 51 and a second wire 52. The first wire 51 can control the first tube body 1 to complete the first-stage bending deformation. After the first wire 51 is pulled, the first tube body 1 coils one circle. The second wire 52 can control the first tube body 1 to complete the second-stage bending deformation. After the second wire 52 is pulled, the first tube body 1 coils the second circle. Further, the wire group 5 may further include a third wire, a fourth wire, etc., which are not limited herein.

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

[0053] Specifically, referring to Figure 2, a first tube body 1 is provided with a first wire-drawing hole 511 and a second wire-drawing hole 512. The first wire 51 is introduced from the tail-end inlet 53 of the first tube body 1, then led out from the first wire-drawing hole 511, and then enters the second wire-drawing hole 512 and is led out from the inlet 53.

[0054] In some embodiments, the head and tail of the first wire 51 are connected. During the process of pulling the first wire 51 outwards, the first wire-drawing hole 511 and the second wire-drawing hole 512 approach each other and coincide with each other, so that the first tube body 1 is bent and coiled.

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

[0056] In some embodiments, the head and tail of the second wire 52 are connected. During the process of pulling the second wire 52 outwards, the third wire-drawing hole 521 and the fourth wire-drawing hole 522 approach each other and coincide with each other, so that the first tube body 1 is bent and coiled.

[0057] Among them, marks should be made to distinguish between the first wire 51 and the second wire 52. For example, the first wire 51 and the second wire 52 can be distinguished by wires of different colors to ensure that the user first pulls the first wire 51 and then pulls the second wire 52.

[0058] In order to make the first tube body 1 wind small circles first and then large circles during the process of pulling the wire, and to realize the controllability of the separation length between the first tube body 1 and the second tube body 2, referring to Figure 2 , the distance between the first wire-drawing hole 511 and the head end of the first tube body 1 is less than the distance between the third wire-drawing hole 521 and the head end of the first tube body 1, the distance between the second wire-drawing hole 512 and the head end of the first tube body 1 is less than the distance between the fourth wire-drawing hole 522 and the head end of the first tube body 1, and the distance between the third wire-drawing hole 521 and the head end of the first tube body 1 is less than the distance between the second wire-drawing hole 512 and the head end of the first tube body 1. Thus, after the first wire-drawing hole 511 and the second wire-drawing hole 512 coincide, it will not affect the coincidence of the third wire-drawing hole 521 and the fourth wire-drawing hole 522.

[0059] In some embodiments, as Figure 1 and Figure 3 shown, the thoracic drainage tube 100 further includes a connecting seat 4. The connecting seat 4 is provided with a buckle groove 44. The first wire 51 and the second wire 52 can be wound around the buckle groove 44 for fixation, and the buckle can be snap-fitted with the buckle groove 44 to further fix the wire. After the wire is fixed, the first tube body 1 in the chest cavity is fixed and curled into a pig-tail shape, "hooking" the chest wall, effectively preventing the tube from slipping out.

[0060] Referring to Figures 1 - 4, the cross-section of the first tube body 1 is circular, and the cross-section of the second tube body 2 is concave arc-shaped. The first tube body 1 is embedded in the concave arc surface 26 of the second tube body 2. The first tube body 1 and the second tube body 2 are respectively set as the sun tube 1 with a circular cross-section and the moon tube 2 with a concave arc-shaped cross-section. On the one hand, it can reduce the cross-sectional area of the tube body of the drainage double tube 10, avoid too large a wound surface caused during the intubation process, reduce the pain of the patient, and increase the recovery time. On the other hand, it can reduce the sharpness of the outer surface of the drainage double tube 10, reduce the cutting damage of the edges and corners of the drainage double tube 10 to human tissues during the intubation process. Further, the large structural difference can also be conducive to the medical staff to distinguish different pipelines during the intubation process. The first tube body 1 with a circular cross-section has better flexibility and is more conducive to bending in the thoracic cavity, while the second tube body 2 with a concave arc-shaped cross-section has higher strength, is less likely to deform, and is more conducive to improving the strength of the drainage double tube 10 and facilitating insertion into human tissues.

[0061] In some embodiments, drainage holes are provided in the concave arc of the second tube body 2 with a concave arc-shaped cross-section. When the second tube body 2 is wrapped by tissues, the drainage holes located in the concave arc can remain in an open state, avoiding blockage of the drainage holes due to tissue wrapping.

[0062] In some embodiments, when the first tube body 1 is wrapped by tissues, the drainage holes provided on the inner side of the first tube body 1 arranged in a surrounding manner will not be blocked due to tissue wrapping, ensuring that the thoracic cavity drainage tube 100 can drain smoothly outward.

[0063] According to an embodiment of the present invention, the traditional single-chamber tube only supports one-way drainage. For situations such as empyema that require flushing the thoracic cavity, it is necessary to introduce liquid into the thoracic cavity through the drainage tube, and then drain the introduced liquid through the drainage tube after sufficient liquid is introduced. During the process, the thoracic cavity pressure changes greatly, and it is difficult to flush in place.

[0064] Therefore, in the embodiment of the present invention, a flushing cavity 21 is added in the second tube body 2, and medical staff can perfuse flushing liquid into the patient's thoracic cavity through the flushing cavity 21. Through the process of perfusing the flushing liquid, the patient's thoracic cavity can be fully flushed.

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

[0066] The flushing liquid enters the thoracic cavity through the flushing cavity 21, flows downward under the action of gravity in the thoracic cavity, and fully flushes the inside of the thoracic cavity. Then it mixes with the accumulated fluid in the thoracic cavity. Fibrous protein exudate often forms in the thoracic cavity, causing blockage of the lumen or side holes of the pipeline. The flushing liquid can reduce the consistency of the accumulated fluid, avoid blockage of the lumen, and facilitate the discharge of the accumulated fluid.

[0067] The fluid accumulation inside the chest cavity can be discharged in time through the first tube body 1, that is, the flushing fluid transported into the chest cavity by the flushing cavity 21 can be discharged in time after entering the chest cavity. The pressure inside the chest cavity is not affected by the flushing process, and the flushing time is reduced, the catheterization time is reduced, and the pain of the patient is reduced.

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

[0069] Among them, the flushing cavity 21 only occupies a very small part of the lumen of the second tube body 2, and the cross-sectional diameter is between 1 mm and 2 mm. The cross-sectional area of the air cavity 22 is much larger than the cross-sectional area of the flushing cavity 21 to ensure that there is enough space inside the second tube body 2 for sufficient exhaust outward, avoiding the influence of the setting of the flushing cavity 21 on the drainage effect of the chest drainage tube 100.

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

[0071] Among them, the first joint 41 can be inserted into the lumen of the first tube body 1 to be connected with the first tube body 1, the second joint 42 can be inserted into the air cavity 22 of the second tube body 2 to be connected with the second tube body 2, and the third joint 43 can be inserted into the flushing cavity 21 to be connected with the second tube body 2.

[0072] In some embodiments, since most of the drainage double tube 10 is inserted into the patient's body, in order to avoid the twisting of the positions of the first tube body 1 and the second tube body 2 and clarify the relative positions of the first tube body 1 and the second tube body 2 in the chest cavity, marks are provided on the outer peripheral wall of the connecting seat 4. Medical staff control the intubation and drainage operations by observing the actual positions of the marks to ensure the accuracy of the operations.

[0073] In some embodiments, the chest drainage tube 100 further includes a fixing member, and the fixing member 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, affecting the drainage effect and causing secondary harm to the patient.

[0074] Since the cross-sectional area of the flushing cavity 21 is small, that is, the cavity of the flushing cavity 21 is thin, the process of inserting and mating the third joint 43 with the flushing cavity 21 is complex and difficult to control. Therefore, the third joint 43 should be made of a relatively hard material. On the one hand, it can prevent the relatively thin structure of the third joint 43 from being damaged under external forces. On the other hand, it can increase the convenience of the insertion and mating.

[0075] Specifically, the third joint 43 is a metal joint, so as to utilize the metal material to increase the structural strength and hardness of the third structure, so as to improve the convenience of the process of inserting the third joint 43 into the flushing cavity 21 during the cooperation between the double-drainage tube 10 and the connection seat 4.

[0076] Furthermore, referring to Figure 1 , the length of the third joint 43 is longer than that of the first joint 41 and the second joint 42. During the process of mating the connection seat 4 with the double-drainage tube 10, first, the third joint 43 mates with the flushing cavity 21. Since the cross-sectional area of the flushing cavity 21 is small, the mating between the flushing cavity 21 and the third joint 43 is prone to displacement. First, the third joint 43 mates with the flushing cavity 21, which can ensure the stability and accuracy of the mating between the third joint 43 and the flushing cavity 21 and then control the mating of the first joint 41 and the second joint 42 with the cavity, reducing the mating difficulty and improving the convenience of the process of inserting the third joint 43 into the flushing cavity 21.

[0077] In some embodiments, the first tube body 1 and the second tube body 2 are integrated at the end and the air cavities in the tube cavities are communicated. The two are combined into one body and the cross-section is a circular tube segment. Thus, the connection seat can combine the first joint and the second joint, facilitating the connection between the connection seat and the double-drainage tube 10. The connection seat can be provided with only two joints, one for drainage and the other for flushing.

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

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

[0080] Specifically, in some embodiments, as Figure 2As shown, a plurality of first side holes 11 are formed on the first mating surface at intervals in the length direction of the first tube body 1. Existing drainage tubes require medical staff to trim the drainage tubes according to experience and different drainage positions to trim out drainage holes with appropriate positions. However, since the medical staff cannot ensure the size of the drainage holes during the trimming process, nor can they ensure the smoothness and roundness of the drainage openings after trimming, not only is the drainage effect of the drainage tube uncontrollable, but it may also cause harm to the patient.

[0081] Through the setting of the first side holes 11, by controlling the controllable tearing and separation between the first tube body 1 and the second tube body 2, the number of opened first side holes 11 is controlled. And since the position of the tearing and separation between the first tube body 1 and the second tube body 2 must be inside the chest cavity, the opened first side holes 11 must also be located inside the chest cavity, so that problems such as subcutaneous gas accumulation or air leakage outside the chest cavity will not occur.

[0082] Since the tearing length of the first tube body 1 is long enough, that is, the first side holes 11 are provided on a sufficient length of the first tube body 1, there are enough first side holes 11 on the first tube body 1 to participate in the drainage of the effusion, improving the drainage efficiency.

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

[0084] Existing drainage tubes require medical staff to trim the drainage tubes according to experience and different drainage positions to trim out drainage holes with appropriate positions. However, since the medical staff cannot ensure the size of the drainage holes during the trimming process, nor can they ensure the smoothness and roundness of the drainage openings after trimming, not only is the drainage effect of the drainage tube uncontrollable, but it may also cause harm to the patient.

[0085] Through the setting of the third side holes 24, by controlling the controllable tearing and separation between the first tube body 1 and the second tube body 2, the number of opened third side holes 24 is controlled. And since the position of the tearing and separation between the first tube body 1 and the second tube body 2 must be inside the chest cavity, the opened third side holes 24 must also be located inside the chest cavity, so that problems such as subcutaneous gas accumulation or air leakage outside the chest cavity will not occur.

[0086] Since the tearing length of the first tube body 1 is long enough, that is, the third side holes 24 are provided on a sufficient length of the second tube body 2, there are enough third side holes 24 on the second tube body 2 to participate in the drainage of the gas accumulation, improving the drainage efficiency.

[0087] Fibrin exudate often forms in the chest cavity, causing lumen blockage or blockage of the side holes of the pipeline. Enough side holes participating in the drainage can also avoid the problem of lumen blockage.

[0088] In some embodiments, on one side of the first tube body 1 facing away from the second tube body 2, a plurality of second side holes 12 are provided at intervals in the length direction of the first tube body 1. The second side holes 12 are arranged near the head end of the double drainage tube 10. Since the second side holes 12 are always open, the number of openings of the first side holes 11 is greater than that of the second side holes 12 to prevent the second side holes 12 from being outside the thoracic cavity after catheterization, causing problems such as subcutaneous gas accumulation or air leakage. Further, the opening area of the first side holes 11 is greater than that of the second side holes 12 to improve the drainage efficiency.

[0089] In some embodiments, on one side of the second tube body 2 facing away from the first tube body 1, a plurality of fourth side holes 25 are provided at intervals in the length direction of the second tube body 2. The fourth side holes 25 are arranged near the head end of the double drainage tube 10. Since the fourth side holes 25 are always open, the number of openings of the third side holes 24 is greater than that of the fourth side holes 25 to prevent the fourth side holes 25 from being outside the thoracic cavity after catheterization, causing problems such as subcutaneous gas accumulation or air leakage. Further, the opening area of the third side holes 24 is greater than that of the fourth side holes 25 to improve the drainage efficiency.

[0090] In summary, the double drainage tube 10 adopts a double-tube side-by-side composite structure of the "sun tube 1" and the "moon tube 2" for morphological fusion design. The "sun tube 1" with a better elastic circular cross-section and the concave arc cross-section "moon tube 2" with stronger material rigidity are weakly bonded to form a composite tube body, so that the outer diameter of the cross-section formed by the double-tube combination is only reduced by more than 80% compared with the outer diameter of the traditional double-tube cross-section, and the trauma amount during the placement of the traditional double-tube is smaller.

[0091] The first tube body 1 and the second tube body 2 adopt a controllable separation mechanism, and the in-vivo separation of the tearable section is realized through weak bonding and / or pre-cutting. The separation length at the head end is relatively long, which can ensure a stable height difference between the two tubes in the thoracic cavity. Through a two-stage wire-pulling system, the first wire 51 controls the primary pigtail-shaped bend, and the second wire 52 realizes the secondary expansion bend. The curvature radius of the primary bend is smaller than that of the secondary expansion bend, so as to accurately locate the costophrenic angle. A shape memory alloy can be placed in the sun tube 1 for auxiliary positioning. For example, a nitinol wire is placed in the sun tube 1, and the bending memory effect is activated by body temperature to enhance the positioning stability.

[0092] The inside of the moon tube 2 is separated into a flushing cavity 21 and an air cavity 22 by a longitudinal diaphragm 23 to realize synchronous drainage and flushing. In some embodiments, a micro check valve can be configured in the flushing cavity 21 to prevent negative pressure imbalance. The risk of fibrin deposition is reduced by cooperating with pulsed flushing during the drainage process through the flushing cavity 21. A dynamic opening is formed by the tearable first tube body 1 and the second tube body 2. Side holes are preset on the contact surface of the sun tube 1 and the moon tube 2, and the effective hole positions are automatically exposed after separation, improving the drainage efficiency.

[0093] A magnetic quick connector may be provided between the connecting seat 4 and the double-drainage tube 10, and different colors may be used to distinguish between the respective cavities. For example, the air cavity 22 defined by the second tube body 2 is red, the flushing cavity 21 defined by the second tube body 2 is yellow, and the liquid cavity 13 defined by the first tube body 1 is blue. An anti-misinsertion structure may also be designed to avoid connection errors. The thoracic drainage tube 100 may also be integrated with a micro sensor for real-time display of changes in intrathoracic pressure.

[0094] A hydrophilic coating may also be provided on the surface of the tube body to reduce the friction coefficient and reduce harm to the patient. An antibacterial composite layer may also be provided on the surface of the tube body to increase the antibacterial rate.

[0095] Using the thoracic drainage tube 100 of the present invention, compared with the traditional single tube, the catheterization time can be reduced by half, the drainage sufficiency rate can be increased by 30%, the thoracic cavity flushing can be completed in one time without repeated operations, the general pain index of the patient can be reduced, and the extubation time can be reduced by 50%.

[0096] The thoracic drainage tube 100 of the present invention can be applied to complex hydropneumothorax to achieve synchronous drainage during a single catheterization process, and the flow rates of both the air cavity 22 and the liquid cavity 13 are greatly improved. It can also be applied to empyema flushing treatment to achieve closed-loop flushing, support continuous irrigation, and increase the fibrin clearance rate in the thoracic cavity. It can also be applied to postoperative lung re-expansion. By dynamically adjusting the negative pressure through the pressure monitoring module, the lung re-expansion time can be shortened.

[0097] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0098] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A chest drainage tube, characterized in that: include: A double drainage tube comprises a first tube body and a second tube body, wherein the double drainage tube comprises a tearable section near the head end, wherein the tearable section enables the first tube body and the second tube body to be detachably connected side by side through a weak adhesive or pre-cut structure, and the portion where the first tube body is separated from the second tube body is bent and deformed toward a side away from the second tube body.

2. The chest drainage tube according to claim 1, characterized in that: The first tube body is made of elastic material and has prefabricated bending memory, and a tear line for triggering the separation of the tearable section is provided between the first tube body and the second tube body; and / or, the cross-section of the first tube body is circular, the cross-section of the second tube body is concave arc-shaped, and the first tube body is embedded in the concave arc surface of the second tube body.

3. The chest drainage tube according to claim 1, characterized in that: The first tube body includes a pull wire group, and the pull wire group is used to assist the first tube body to separate from the second tube body and control the bending and fixing of the first tube body.

4. The chest drainage tube according to claim 3, characterized in that: The pull wire group includes a first pull wire and a second pull wire, The first tube body is provided with a first wire drawing hole and a second wire drawing hole. The first wire drawing is introduced from the inlet at the rear end of the first tube body and then led out from the first wire drawing hole, and then enters the second wire drawing hole and then leads out from the inlet. The first tube body is provided with a third wire pulling hole and a fourth wire pulling hole. The second wire pulling wire is introduced from the inlet at the rear end of the first tube body and then led out from the third wire pulling hole, and then enters the fourth wire pulling hole and then led out from the inlet. Among them, the distance between the first wire pulling hole and the first tube head end is smaller than the distance between the third wire pulling hole and the first tube head end, the distance between the second wire pulling hole and the first tube head end is smaller than the distance between the fourth wire pulling hole and the first tube head end, and the distance between the third wire pulling hole and the first tube head end is smaller than the distance between the second wire pulling hole and the first tube head end.

5. The chest drainage tube according to claim 1, characterized in that: A partition structure is provided in the lumen of the second tube body. The partition structure is a longitudinal diaphragm extending along the long axis of the second tube body. The partition structure divides the lumen of the second tube body into a flushing cavity and an air cavity.

6. The chest drainage tube according to claim 5, characterized in that: Also includes: A connecting seat, the connecting seat includes a first joint, a second joint and a third joint, the first joint can be inserted into the tube cavity of the first tube body and matched with the first tube body, the second joint can be inserted into the air cavity of the second tube body and matched with the second tube body, and the third joint can be inserted into the flushing cavity and matched with the second tube body.

7. The chest drainage tube according to claim 6, characterized in that: The outer peripheral wall of the connecting seat is provided with a mark; And / or, the chest drainage tube further comprises a fixing member, and the fixing member is capable of fixing the connecting seat to the patient's body surface; And / or, the third joint is a metal joint; And / or, the length of the third joint is longer than the length of the first joint and the second joint.

8. The chest drainage tube according to claim 1, characterized in that: A first mating surface is formed on a side of the first tube body facing the second tube body, and a second mating surface is formed on a side of the second tube body facing the first tube body. The first mating surface is matingly connected with the second mating surface, and openings are provided on the first mating surface and the second mating surface.

9. The chest drainage tube according to claim 8, characterized in that: The first mating surface is formed with a plurality of first side holes spaced apart in the length direction of the first tube body, and the first tube body is provided with a plurality of second side holes spaced apart in the length direction of the first tube body on a side away from the first mating surface, and the second side holes are arranged near the head end of the drainage double tube. Wherein, the number of openings of the first side hole is greater than the number of openings of 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.

10. The chest drainage tube according to claim 8, characterized in that: The second mating surface is formed with a plurality of third side holes spaced apart in the length direction of the second tube body, and the second tube body is provided with a plurality of fourth side holes spaced apart in the length direction of the second tube body on a side away from the second mating surface, and the fourth side holes are arranged close to the head end of the drainage double tube. The number of openings of the third side hole is greater than the number of openings of 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.

Images