Drainage tube with anti-falling and protection functions

Abstract

In order to achieve the purposes of preventing a drainage tube from falling off and protecting the inner wall of the heart, the drainage tube with the falling-off preventing and protecting functions comprises an arc-shaped tube body, a supporting sheath is movably arranged in the tube body, and a guide wire is arranged in the supporting sheath; a conical connecting part is arranged at the far end of the tube body; the connecting part comprises a plurality of connecting bodies, and the connecting bodies have a contraction state or an expansion state. The pipeline can be prevented from being separated from the position; the drainage pipeline is effectively prevented from damaging the inner wall of the heart and causing accidents such as perforation, and the safety of the drainage pipeline is improved. And meanwhile, the drainage pipeline is prevented from falling off from a preset position on the premise of not influencing the hydromechanical property of the drainage pipeline, and the effectiveness of the drainage pipeline is improved.

Description

Technical Field

[0001] The invention relates to the technical field of artificial auxiliary heart parts, and in particular to a drainage tube with anti-dropout and protection functions. Background Art

[0002] For patients with severe cardiopulmonary failure, ECMO (extracorporeal membrane oxygenation) treatment is currently a relatively mature model. The basic working principle of ECMO is to extract hypoxic blood from the patient's body through a drainage tube, which is then oxygenated and carbon dioxide removed through an oxygenator outside the body, and then returned to the patient through a perfusion tube. Therefore, the drainage tube is a key component of the ECMO system to achieve blood drainage and oxygenation.

[0003] The currently disclosed patent document CN115300696A specifically discloses a left atrial pigtail drainage tube for ECMO with a head end protection function. An expander is installed in the pigtail drainage tube, which can play a certain protective role. However, the curved drainage tube affects the flow of the pipeline, especially at the pigtail end, where the flow is lower or even no flow; as a result, the drainage tube cannot achieve the drainage effect or the drainage effect is low, and the fluid mechanics performance in the tube is poor.

[0004] In other public patent documents, although the flow problem has been alleviated to a certain extent, there are still other problems with drainage tubes. For example, U.S. Patent US8343029B2 uses various radial structural parts to fix the pipeline in the position of the atrial septum to prevent the drainage pipeline from falling off at the predetermined position, but it requires a complicated operation process; another U.S. Patent US20200254232A1 uses an open structure to fix the pipeline, but it increases the wall thickness of the pipeline, which is not conducive to the miniaturization of the pipeline design. Another U.S. Patent US8454549B2 uses a water-filled balloon to fix the pipeline, which increases the operation steps on the one hand and increases the wall thickness of the pipeline on the other hand.

[0005] In summary, how to prevent the drainage tube from falling off and protect the inner wall of the heart without affecting the internal fluid mechanics properties of the drainage tube has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] The present invention aims to solve the technical problems existing in the prior art and provide a drainage tube with anti-dropout and protective functions, which can improve the stability and safety of the drainage tube in the body.

[0007] The technical solution of the present invention is achieved through the following measures: a drainage tube with anti-slip and protective functions, including an arc-shaped tube body, a support sheath movably arranged in the tube body, and a guide wire arranged in the support sheath; a tapered connecting part is arranged at the distal end of the tube body; the connecting part includes multiple connectors, and the multiple connectors have two states: contracted or opened.

[0008] Furthermore, the connecting part comprises a base, a plurality of connecting bodies are arranged at the distal end, and the base matches the supporting sheath.

[0009] Furthermore, the multiple connectors are in a petal shape when opened.

[0010] Furthermore, the connecting portion has two or more conical structures.

[0011] Furthermore, the connector is made of shape memory material.

[0012] Furthermore, the connector includes an inner support body and an outer covering body covering the surface of the inner support body; the inner support body is made of shape memory material.

[0013] The present application discloses a drainage tube with anti-slip and protective functions, including a tube body arranged in an arc shape, which can pass through the atrial septum or aortic valve and the venous system well; a support sheath is movably arranged in the tube body, and a guide wire is arranged in the support sheath; a taper-shaped connecting part is arranged at the distal end of the tube body; the connecting part includes a plurality of connectors, and the plurality of connectors have two states of contraction or opening. When the support sheath abuts against the connecting part, the connector at the front end of the connecting part is in a contracted state, and the front end of the connector after contraction is tapered, which is convenient for the tube body to pass through blood vessels, atrial septum, and valve structures; when the support sheath is withdrawn, the connector is in an open state, and the plurality of connectors after opening can protect the head end of the pipeline inside the heart, and at the same time can prevent the pipeline from falling out of the position where it is located; effectively preventing the drainage pipeline from damaging the inner wall of the heart and causing perforation and other accidents, thereby improving the safety of the drainage pipeline. At the same time, without affecting its fluid mechanics performance, it also prevents the drainage pipeline from falling off from the predetermined position, thereby improving the effectiveness of the drainage pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an overall schematic diagram of the drainage tube of the present invention;

[0015] Figure 2 It is a schematic diagram of the connection part of the drainage tube of the present invention;

[0016] Figure 3 This is a schematic diagram of the connector after it is opened according to the first embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of a connector after closure according to the second embodiment of the present invention;

[0018] Reference numerals:

[0019] 100 tube body, 120 guide wire, 200 connecting part, 210 base body, 220 connecting body. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two components, it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. The term "distal end" refers to the end close to the operator's heart.

[0022] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] The present embodiment provides a drainage tube with anti-slip and protective functions, including an arc-shaped tube body 100, a support sheath movably arranged inside the tube body 100, and a guide wire 120 arranged inside the support sheath; a tapered connecting portion 200 is arranged at the distal end of the tube body 100; the connecting portion 200 includes a plurality of connectors 220, and the plurality of connectors 220 have two states: contracted or opened.

[0025] The present application discloses a drainage tube with anti-slip and protective functions, which fully considers the actual needs and safety of clinical use, and its unique structural design gives it multiple advantages. Structurally, it includes a tube body 100 arranged in an arc shape, which can pass through the atrial septum or aortic valve and the venous system well, and also reduces the friction and damage to the surrounding tissues during the insertion process, thereby improving the comfort of the patient. A support sheath is movably arranged in the tube body 100, and a guide wire 120 is arranged in the support sheath. The built-in support sheath and guide wire 120 system enable the drainage tube to be more flexible and stably advanced during insertion. The doctor can adjust the position of the support sheath as needed to assist the tube body 100 to pass through narrow or curved parts smoothly. At the same time, the presence of the guide wire 120 also increases the accuracy of the operation.

[0026] The distal end of the tube body 100 is provided with a conical connection part 200; the connection part 200 includes a plurality of connection bodies 220, so that the connection body 220 can flexibly change its state under the action of the support sheath. In this case, the plurality of connection bodies 220 have two states of contraction or opening. The base body 210 matches the support sheath. In this embodiment, the base body 210 is a hollow tube sleeve structure, and the distal end of the support sheath is a columnar structure, which is sleeved in the base body 210. When the support sheath abuts against the connection part 200, the connection body 220 at the front end of the connection part 200 is in a contracted state. After contraction, the front end of the connection body 220 is conical, which is convenient for the tube body 100 to pass through blood vessels, atrial septum, valves and other structures; when the support sheath is withdrawn, the connection body 220 is in an open state. After opening, the plurality of connection bodies 220 can protect the head end of the pipeline inside the heart, which can not only prevent the tube body 100 from damaging the inner wall of the heart, but also effectively prevent the pipeline from coming out, greatly improving the safety and stability of use. In a specific implementation, when the multiple connectors 220 are opened to form a petal shape, the use effect is best.

[0027] The drainage tube of the present invention can effectively prevent the drainage tube from damaging the inner wall of the heart and causing accidents such as perforation, thereby improving the safety of the drainage tube. At the same time, without affecting its fluid mechanics performance, it can also prevent the drainage tube from falling off from a predetermined position, thereby improving the effectiveness of the drainage tube. It provides more reliable technical support for cardiac surgery and subsequent treatment.

[0028] Further, in other embodiments of the present application, the connection portion 200 has two or more conical structures. As shown in the accompanying drawings, the connection portion 200 is a two-stage conical structure, which has more significant advantages over the one-stage conical structure. On the one hand, in the contracted state, the multi-stage conical structure can better adapt to and pass through complex and delicate human structures such as blood vessels, atrial septum and valves. Due to the gradually reduced design of the cone, it can smoothly pass through these narrow or sensitive areas without causing excessive trauma or damage, thereby greatly improving the safety of use. On the other hand, when the connector 220 is in an open state, its multi-stage conical design also shows excellent performance. This design enables the connection portion 200 to better fit the structure inside the heart, and a more optimized match can be achieved in both shape and size. This close fit not only further improves the safety of use, but also significantly enhances stability, ensuring the firmness and reliability of the connection portion 200 during surgery or treatment.

[0029] Furthermore, the connector 220 is made of shape memory material, which can be switched between different states and maintain a stable shape memory effect. For example, nickel-titanium alloy, shape memory polymer material, etc. can be selected. In one embodiment of the present case, the connector 220 can be made of shape memory material as a whole, such as nickel-titanium alloy with good biocompatibility, which can not only meet the requirements of the connector 220 for shape memory performance, but also maintain good biocompatibility when in contact with the human body, reducing the risk of adverse reactions.

[0030] In another embodiment, the design of the connector 220 is further optimized, and a composite material structure is adopted, and some materials are made of shape memory alloy. The specific structure of the connector 220 includes an inner support body and an outer covering body covering the surface of the inner support body; the inner support body is made of shape memory material, and the inner support body can be in a mesh, filament, etc. The mesh structure can provide uniform support force, while the filament structure is more flexible and convenient for passing through narrow spaces. The outer covering body is made of materials with good biocompatibility such as polyurethane. This material not only has good biocompatibility, but also can fit closely with human tissue to reduce the risk of adverse reactions. At the same time, the outer covering body can also protect the inner support body from erosion and damage from the external environment, and extend the service life of the connector 220. With the structure of this embodiment, the connector 220 and the end of the tube body 100 can be better integrated, simplifying the processing flow and reducing manufacturing costs.

[0031] Although embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A drainage tube with anti-drop and protective functions, characterized in that: The invention comprises a tubular body (100) arranged in an arc shape, a support sheath movably arranged in the tubular body (100), and a guide wire (120) arranged in the support sheath; a conical connecting part (200) is arranged at the distal end of the tubular body (100); the connecting part (200) comprises a plurality of connecting bodies (220), and the plurality of connecting bodies (220) have two states: contracted or expanded.

2. According to the drainage tube with anti-drop and protective functions as described in claim 1, the connecting part (200) includes a base (210), and a plurality of connectors (220) are arranged at the distal end, and the base (210) matches the supporting sheath.

3. According to the drainage tube with anti-drop and protective functions as claimed in claim 1 or 2, the multiple connectors (220) are in a petal shape when opened.

4. According to the drainage tube with anti-drop and protective functions as claimed in claim 1 or 2, the connecting portion (200) has two or more conical structures.

5. According to the drainage tube with anti-drop and protective functions as claimed in claim 1 or 2, the connector (220) is made of shape memory material.

6. According to a drainage tube with anti-drop and protective functions as described in claim 1 or 2, the connector (220) comprises an inner support body and an outer covering body covering the surface of the inner support body; the inner support body is made of shape memory material.

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