Anti-reflux stent for organ conduits
By installing a Tesla valve-structured interlayer stent within the organ tubing, the problem of organ tubing reflux was solved, achieving the dual functions of expansion and reflux prevention, thus providing a new treatment method.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING TSINGHUA CHANGGUNG HOSPITAL
- Filing Date
- 2024-12-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN224345040U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an anti-reflux stent for organ tubing. Background Technology
[0002] In the tubules of organs within the human body (such as arteries, veins, and bile ducts), fluids like blood and bile flow unidirectionally driven by pressure differences. However, under certain pathological conditions, changes in the local pressure differences within these tubules can lead to reduced flow velocity, decreased flow rate, or even reflux, affecting the physiological function of the target organs. Normally, all organs in the human body are supplied with blood by arteries, providing oxygen and nutrients to the tissues, which then return to the heart via veins. If reduced flow velocity, decreased flow rate, or reflux occurs in these tubules, tissue and organ ischemia and hypoxia can occur, potentially leading to tissue remodeling, damage, and necrosis, resulting in ischemic diseases of various organs.
[0003] In recent years, with advancements in technology, improvements in methods, and continuous enhancements in hardware, software, and equipment, the implantation of stents in blood vessels to prevent blockages has gradually become an important medical practice. However, existing anti-blockage stents can only expand the vessels and other organs' ducts, and cannot solve the reflux problem caused by changes in pressure differences within the organ's ducts. Utility Model Content
[0004] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes an anti-reflux stent for organ tubing to address the problem of reflux within organ tubing, which can lead to organ disease.
[0005] This utility model provides an anti-reflux stent for organ tubing, the anti-reflux stent comprising:
[0006] The inner wall has a groove extending circumferentially to form a semi-annular shape on its inner surface.
[0007] The outer wall has an inner surface with a groove extending circumferentially to form a semi-annular shape.
[0008] The inner wall and the outer wall are interlocked, and a plurality of grooves are arranged axially and alternately distributed on the inner wall or the outer wall to form a sandwich with a Tesla valve structure.
[0009] According to the present invention, an anti-reflux stent for organ tubing is provided, wherein the groove includes a first drainage surface, a second drainage surface, and a slot located on the inner wall surface or the outer wall surface;
[0010] The second drainage surface is positioned axially lower than the slot, and the first drainage surface extends from the slot toward the inner wall or the outer wall in a direction inclined to the axial direction and is tangent to the second drainage surface.
[0011] According to the present invention, an anti-reflux stent for organ tubing is provided, wherein the first drainage surface is a conical surface, and the second drainage surface is an arc surface and is located at the lower end of the first drainage surface in the axial direction, such that the groove has a teardrop shape in cross section perpendicular to its extension direction.
[0012] According to the present invention, an anti-reflux stent for organ tubing further includes a frame for supporting the inner wall and the outer wall in a tubular shape, the frame being semi-annular and embedded inside the inner wall and the outer wall.
[0013] According to the present invention, an anti-reflux stent for organ tubing is provided, wherein the inner wall and the outer wall are respectively provided with grooves at equal intervals along the axial direction, and the frame is provided with a one-to-one correspondence between the grooves.
[0014] According to the present invention, an anti-reflux stent for organ tubing is provided, wherein the cross-section of the frame is configured to be similar in shape to the cross-section of the groove, and the cross-sectional dimension of the frame is smaller than the cross-sectional dimension of the groove.
[0015] According to the present invention, an anti-reflux stent for organ tubing is provided, wherein the frame and the groove are axially aligned and centered.
[0016] According to the present invention, an anti-reflux stent for organ tubing further includes a third drainage surface, which is configured as a wall surface between adjacent slots on the inner wall and the outer wall, for blocking liquid flowing out along the second drainage surface.
[0017] According to the present invention, an anti-reflux stent for organ tubing has an inner wall thickness that is the same as the outer wall thickness, and the gap between the inner wall and the outer wall is less than or equal to half the wall thickness.
[0018] The above-mentioned one or more technical solutions of this utility model have at least one of the following technical effects: the anti-reflux stent, by setting a sandwich with a Tesla valve structure between the inner wall and the outer wall, enables the anti-reflux stent to both expand the human organ tubules to prevent diseases caused by blockage, and avoid reflux in the organ tubules to affect the physiological function of the organs, thus providing a new medical means for treating diseases.
[0019] In addition to the technical problems solved by this utility model, the technical features of the technical solutions constituted by this utility model, and the advantages brought about by these technical features, as described above, other technical features of this utility model and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or can be learned through the practice of this utility model. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a front view of the anti-backflow support provided in an embodiment of the present utility model.
[0022] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the anti-backflow support at section AA.
[0023] Figure 3 A three-dimensional structural diagram of the anti-backflow support provided in an embodiment of this utility model.
[0024] Figure label:
[0025] 1. Anti-backflow support; 11. Inner wall; 12. Outer wall; 31. Frame; 32. Groove; 41. First drainage surface; 42. Second drainage surface; 43. Slot; 44. Third drainage surface. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.
[0029] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0031] In the tubules of organs within the human body (such as arteries, veins, and bile ducts), fluids like blood and bile flow unidirectionally driven by pressure differences. However, under certain pathological conditions, changes in the local pressure differences within these tubules can lead to reduced flow velocity, decreased flow rate, or even reflux, affecting the physiological function of the target organs. Normally, all organs in the human body are supplied with blood by arteries, providing oxygen and nutrients to the tissues, which then return to the heart via veins. If reduced flow velocity, decreased flow rate, or reflux occurs in these tubules, tissue and organ ischemia and hypoxia can occur, potentially leading to tissue remodeling, damage, and necrosis, resulting in ischemic diseases of various organs.
[0032] In recent years, with advancements in technology, improvements in methods, and continuous enhancements in hardware, software, and equipment, the implantation of stents in blood vessels to prevent blockages has gradually become an important medical practice. However, existing anti-blockage stents can only expand the vessels and other organs' ducts, and cannot solve the reflux problem caused by changes in pressure differences within the organ's ducts.
[0033] To address the aforementioned challenges, this invention provides an anti-reflux stent for organ tubing. The anti-reflux stent 1 mainly comprises an inner wall 11, an outer wall 12, and a sandwich layer with a Tesla valve structure formed between the inner wall 11 and the outer wall 12.
[0034] Specifically, such as Figures 1 to 3 As shown, the inner surface of the inner wall has a semi-annular groove extending circumferentially. The inner surface of the outer wall has a semi-annular groove extending circumferentially.
[0035] The inner wall and the outer wall are interlocked, and a plurality of grooves are arranged axially and alternately distributed on the inner wall or the outer wall to form a sandwich with a Tesla valve structure.
[0036] A plurality of the grooves 32 are arranged axially and alternately distributed on the inner wall 11 or the outer wall 12 to form a sandwich with a Tesla valve structure for restricting the unidirectional flow of fluid in the sandwich.
[0037] In this embodiment, the anti-reflux stent 1, by setting a sandwich with a Tesla valve structure between the inner wall 11 and the outer wall 12, enables the anti-reflux stent to both expand the human organ tubules to prevent diseases caused by blockage, and avoid reflux in the organ tubules that affects the physiological function of the organs, thus providing a new medical means for treating diseases.
[0038] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0039] The groove 32 includes a first drainage surface 41, a second drainage surface 42, and a slot 43 located on the inner wall 11 or the outer wall 12.
[0040] The second drainage surface 42 is positioned axially lower than the slot 43, and the first drainage surface 41 extends from the slot 43 toward the inner wall 11 or the outer wall 12 in a direction inclined to the axial direction and is tangent to the second drainage surface 42.
[0041] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0042] The first drainage surface 41 is a conical surface, and the second drainage surface 42 is an arc surface and is located at the lower end of the first drainage surface 41 in the axial direction, so that the groove 32 has a teardrop shape in cross section perpendicular to its extension direction.
[0043] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0044] like Figure 2 As shown, the anti-backflow support also includes a frame 31 for supporting the tubular inner wall 11 and the outer wall 12. The frame 31 is semi-annular and is embedded inside the walls of the inner wall 11 and the outer wall 12.
[0045] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0046] The inner wall 11 and the outer wall 12 are respectively provided with grooves 32 at equal intervals along the axial direction. The frame 31 is provided with a one-to-one correspondence with the grooves 32.
[0047] Furthermore, the cross-section of the frame 31 is set to a shape similar to the cross-section of the groove 32, and the cross-sectional dimension of the frame 31 is smaller than the cross-sectional dimension of the groove 32.
[0048] Furthermore, the frame 31 and the groove 32 are aligned axially.
[0049] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0050] The anti-backflow support also includes a third drainage surface 44. The third drainage surface 44 is configured as the wall surface between adjacent slots 43 on the inner wall 11 and the outer wall 12, and is used to block liquid flowing out along the second drainage surface 42.
[0051] Furthermore, the wall thickness of the inner wall 11 is the same as that of the outer wall 12, and the distance between the inner wall 11 and the outer wall 12 is less than or equal to half the wall thickness.
[0052] Based on the above embodiments, another embodiment of this utility model introduces an anti-reflux stent for organ tubing.
[0053] The principle of the anti-backflow support restricting the unidirectional flow of fluid is as follows: When the liquid flows from top to bottom along the gap between the inner wall 11 and the outer wall 12, it will flow into the groove 32 along the first drainage surface 41; after flowing to the second drainage surface 42, the flow direction is changed by the arc surface of the second drainage surface 42, forming a backflow from bottom to top; then, the backflow flows tangentially to the third drainage surface 44 along the second drainage surface 42, and after being rebounded by the third drainage surface 44, it opposes the liquid flowing from top to bottom to form turbulence, and then flows along the gap between the inner wall 11 and the outer wall 12 to the groove 32 below, and then repeats the above process, thereby greatly restricting the liquid from flowing from top to bottom.
[0054] Conversely, when the liquid flows upward along the gap between the inner wall 11 and the outer wall 12, it is first acted upon by the third drainage surface 44 and flows into the groove 32. After flowing into the groove 32, it is acted upon by the first drainage surface 41 and flows upward along the gap between the inner wall 11 and the outer wall 12 towards the third drainage surface 44. Then the above process is repeated, allowing the liquid to pass freely without obstruction.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An anti-reflux stent for organ tubing, characterized in that, include: The inner wall (11) has a groove (32) extending in the circumferential direction to form a semi-annular shape on its inner surface. The outer wall (12) has an inner surface with a groove (32) extending circumferentially to form a semi-annular shape. The inner wall (11) is engaged with the outer wall (12), and a plurality of grooves (32) are alternately arranged along the axial direction on the inner wall (11) or the outer wall (12) and a sandwich with a Tesla valve structure is formed between the inner wall (11) and the outer wall (12). It also includes a frame (31) for supporting the inner wall (11) and the outer wall (12) in a tubular shape, the frame (31) being semi-annular and embedded inside the walls of the inner wall (11) and the outer wall (12); The inner wall (11) and the outer wall (12) are respectively provided with grooves (32) at equal intervals along the axial direction, and the frame (31) is provided with grooves (32) in a one-to-one correspondence.
2. The anti-reflux stent for organ tubing according to claim 1, characterized in that, The groove (32) includes a first drainage surface (41), a second drainage surface (42), and a slot (43) located on the inner wall (11) or the outer wall (12). The second drainage surface (42) is set axially lower than the slot (43), and the first drainage surface (41) extends from the slot (43) toward the wall of the inner wall (11) or the wall of the outer wall (12) in a direction inclined to the axial direction and is tangent to the second drainage surface (42).
3. The anti-reflux stent for organ tubing according to claim 2, characterized in that, The first drainage surface (41) is a conical surface, and the second drainage surface (42) is an arc surface and is located at the lower end of the first drainage surface (41) in the axial direction, so that the groove (32) has a teardrop shape in cross section perpendicular to its extension direction.
4. The anti-reflux stent for organ tubing according to claim 1, characterized in that, The cross-section of the frame (31) is set to a shape similar to the cross-section of the groove (32), and the cross-sectional dimension of the frame (31) is smaller than the cross-sectional dimension of the groove (32).
5. The anti-reflux stent for organ tubing according to claim 4, characterized in that, The frame (31) and the groove (32) are aligned axially.
6. The anti-reflux stent for organ tubing according to claim 3, characterized in that, It also includes a third drainage surface (44), which is set as the wall surface between adjacent slots (43) on the inner wall (11) and the outer wall (12) to block liquid flowing out along the second drainage surface (42).
7. The anti-reflux stent for organ tubing according to claim 6, characterized in that, The thickness of the inner wall (11) is the same as that of the outer wall (12), and the distance between the inner wall (11) and the outer wall (12) is less than or equal to half the wall thickness.