Medical support

Abstract

The invention relates to a medical stent, which is characterized in that adjacent stent unit pieces are movably connected through stent connecting pieces, a stent covering film is connected with the stent unit pieces, and the stent covering film covers the surfaces of the stent unit pieces. The adjacent stent unit pieces are independent individuals, the stent connecting pieces axially connect the adjacent stent unit pieces to construct the complete medical stent, it can be guaranteed that the adjacent stent unit pieces cannot axially fall off, and it is guaranteed that the medical stent has good axial pushing performance and retracement performance. When the medical stent is bent, the adjacent stent unit pieces do not influence each other, the adjacent stent unit pieces are movably connected through the stent connecting pieces, it can be guaranteed that the medical stent has good bending performance, and the medical stent has good flexibility. Therefore, the medical stent with excellent flexibility, pushing performance, retractability and the like is obtained. After the stent covering film is arranged on the surface of the medical stent, the medical stent can conform to anatomical structures of blood vessels or runners in other operations, and local blood flow speed reduction and eddy current effect cannot be caused.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to medical stents. Background Art

[0002] Laser engraved bare stents have excellent support force, and they usually include multiple connecting rods to connect adjacent stent rings. However, since multiple connecting rods are designed in the circumference of the laser engraved bare stent, and the adjacent stent rings are connected by multiple connecting rods, the more connecting rods there are, the more closed-loop structures there are in the laser engraved bare stent, which will lead to greater rigidity of the laser engraved bare stent, resulting in worse flexibility of the laser engraved bare stent, and then poor fracture resistance in terms of fatigue performance.

[0003] At present, the conventional method can improve the flexibility of the laser engraved bare stent by reducing the number of connecting rods between the stent rings to produce more open structures in the laser engraved bare stent. Alternatively, the shape of the connecting rod or stent ring of the laser engraved bare stent can be changed to improve the flexibility by changing the shape. However, although the conventional method can improve the flexibility of the laser engraved bare stent, once a coating (such as PET, ePTFE) is added to the surface of the laser engraved bare stent, the flexibility of the laser engraved bare stent will still be reduced due to the constraints of the coating. Summary of the invention

[0004] Based on this, it is necessary to provide a medical stent to address the above-mentioned technical problems.

[0005] The present application provides a medical stent, the medical stent comprising:

[0006] At least two bracket units, each bracket unit having a deformation function and being able to be in a contracted state or an expanded state;

[0007] A bracket connector, through which adjacent bracket units are movably connected, and the bracket connector is movable in a radial direction relative to the bracket unit;

[0008] A stent coating is connected to at least one of the stent unit element and the stent connector, wherein the stent coating covers at least a portion of the surface of the stent unit element.

[0009] In one embodiment, the stent coating comprises at least one first coating body and at least one second coating body, the first coating body covers the outer surface of the stent unit element, and the second coating body covers the inner surface of the stent unit element; and / or,

[0010] The stent coating covers the surface of all the stent units, and the stent coating is connected to all the stent units; and / or,

[0011] The stent unit element and the stent covering are sutured to each other.

[0012] In one embodiment, the bracket connector has a first connection position and a second connection position, the first connection position of the bracket connector is connected to the bracket unit, the bracket unit is provided with a first connection structure, the second connection position of the bracket connector is provided with a second connection structure, and the first connection structure is used to be detachably connected to the second connection structure.

[0013] In one embodiment, the bracket connecting member is a connecting rod, and the first connecting position and the second connecting position are two ends of the connecting rod respectively;

[0014] And / or, an auxiliary rod is provided on the bracket unit, one end of the auxiliary rod is connected to the bracket unit, and the other end of the auxiliary rod is provided with the first connecting structure;

[0015] And / or, the first connection structure and the second connection structure are respectively an assembly slot and an assembly clamp, and the assembly clamp and the assembly slot are assembled and clamped with each other.

[0016] In one of the embodiments, the assembly clamp head can be rotatably engaged relative to the assembly clamping slot along at least one rotational direction.

[0017] In one embodiment, the assembly chuck is a spherical chuck, the assembly slot is a spherical slot cavity, and the spherical chuck is rotatably assembled in the spherical slot cavity along multiple rotation directions;

[0018] Alternatively, the assembly clamp is a square clamp, the assembly slot is a square slot cavity, and the square clamp is assembled in the square slot cavity by rotating along a rotation direction.

[0019] In one embodiment, the stent unit is an annular element, the annular outer contour of the annular element can be contracted to present a contracted state, and the annular outer contour of the annular element can be expanded to present an expanded state; and / or,

[0020] A plurality of the bracket connectors are disposed between adjacent bracket units, and the plurality of the bracket connectors are arranged in a ring shape along the bracket units.

[0021] In one embodiment, the bracket unit element includes a plurality of curved unit bodies, and the plurality of curved unit bodies are arranged in a ring shape, and only one of the adjacent curved unit bodies is provided with the bracket connector, so that the plurality of bracket connectors are arranged at intervals on the plurality of curved unit bodies along the circumferential direction of the ring.

[0022] In one embodiment, the bending unit body is a V-shaped bracket, and adjacent V-shaped brackets are connected end to end; and / or,

[0023] The plurality of support connectors arranged in an annular circumferential direction between adjacent support unit elements form an annular group, and the plurality of support connectors in adjacent annular groups are staggered with each other.

[0024] In one embodiment, the stent connector is connected to the tip of the V-shaped stent; or,

[0025] The support connector is connected to a position between any end and the tip of the V-shaped support.

[0026] In the above-mentioned medical stent, adjacent stent units are independent individuals, and the stent connector axially connects the adjacent stent units to form a complete medical stent. The stent connector can ensure that the adjacent stent units will not fall off axially, and ensure that the medical stent has good axial pushability and retraction. When the medical stent is bent, the adjacent stent units do not affect each other, and the adjacent stent units are movably connected through the stent connector, which can ensure that the medical stent has good bending performance, so that the medical stent can be constructed with better flexibility. Since the adjacent stent units in the medical stent can move with each other, the stent coating will not have a significant impact on the bending of the medical stent. On the contrary, because the stent coating is connected on the medical stent, it can also ensure the structural stability of the interconnection between the adjacent stent units, and the bending of the medical stent will not cause the adjacent stent units to fall off from each other. Thus, a medical stent with excellent flexibility, pushability, and retraction is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a planar expansion of a medical stent provided in one embodiment of the present application.

[0028] Figure 2 A schematic diagram of a connection structure of a first connection structure and a second connection structure provided in another embodiment of the present application.

[0029] Figure Number:

[0030] 1000, stent unit component; 2000, stent connector; 3000, stent coating;

[0031] 1000a, bending unit body;

[0032] 1100a, first connection structure; 2100a, second connection structure; 1100, auxiliary rod. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] See also Figure 1 As shown, an embodiment of the present application provides a medical stent, which includes a stent unit 1000 and a stent connector 2000. The number of the stent unit 1000 can be at least two, and the stent unit 1000 has a deformation function. The deformation function means that the stent unit 1000 can be maintained in an expanded state of an expected size or a preset size under a non-stress state, and can also present different degrees of contraction state according to the actual force size under a stress state, so that the stent unit 1000 can be in a contracted state or an expanded state based on the stress condition.

[0040] The stent unit 1000 can be constructed into a variety of structures and shapes according to actual needs. In fact, as long as the stent unit 1000 is connected in an appropriate number and constructed into a stent structure that meets medical needs, it is not limited here. In one embodiment, the stent unit 1000 can be an annular element, and the annular element is not limited to a prismatic ring, an arc ring or a circular ring, which can be selected according to medical needs. Among them, the annular outer contour of the annular element can be contracted to present a contracted state, and the annular outer contour of the annular element can be expanded to present an expanded state. When the stent unit 1000 is a circular ring element, the reduction of the diameter of the circular ring element can present a contracted state, and the expansion of the diameter of the circular ring element can present an expanded state.

[0041] In addition, the support unit 1000 is not limited to being constructed into other regular shapes or irregular shapes such as spheres and ellipsoids. Technical personnel in this field can construct the structure and shape of the support unit 1000 according to actual needs, which is not limited here.

[0042] The stent unit element 1000 can be assembled in a suitable delivery device in a contracted state, and after being delivered to a target position in a living body by the delivery device, the stent unit element 1000 can be expanded by releasing the force applied to the stent unit element 1000, and supported in a target blood vessel or other position in the living body. The deformation function can be manifested as elastic deformation ability, and the stent unit element 1000 can be made of a material with elastic ability. Those skilled in the art can construct the stent unit element 1000 according to actual needs, and no limitation is made here.

[0043] When the medical stent contains two or more stent units 1000, the adjacent stent units 1000 can be movably connected through the stent connector 2000. The stent connector 2000 is movable in the radial direction relative to the stent unit 1000, which can keep the adjacent stent units 1000 from affecting each other when the medical stent is bent. Even after adding the stent coating 3000, the bending performance of the medical stent in the radial direction will not be affected, so that the medical stent as a whole has good flexibility; and the adjacent stent units 1000 can also be detached through the stent connecting rod, so that the stent units 1000 can be decomposed or spliced ​​together as needed. The surgeon can adjust the number of stent units 1000 contained in the medical stent according to the needs, and then adjust the size of the medical stent according to the medical needs. After the adjacent stent units 1000 are connected through the stent connector 2000, two or more stent units 1000 can be constructed into a complete medical stent. The number of bracket connectors 2000 between adjacent bracket unit elements 1000 can be set according to actual needs and is not limited here. As long as the adjacent bracket unit elements 1000 can be connected by bracket connectors 2000 with a suitable number and arrangement form, so that the entire medical bracket is in a stable combined state, it will be fine.

[0044] See also Figure 1 As shown, the medical stent can set any number of stent units 1000 according to actual needs, and all stent units 1000 are arranged in sequence along one direction, for example, all stent units 1000 are arranged along the axial direction of the medical stent. The axial direction of the medical stent can be represented as follows: Figure 1 After the adjacent stent units 1000 are movably connected by the stent connecting rod, the medical stent constructed by the plurality of stent units 1000 can have a certain movable effect in the radial direction of the medical stent. The radial direction of the medical stent can refer to the direction perpendicular to its axial direction, that is, Figure 1 The vertical or up-down direction shown in .

[0045] The above design can keep the adjacent stent units 1000 as independent individuals. The stent connector 2000 can axially connect the adjacent stent units 1000 to form a complete medical stent. The stent connector 2000 can ensure that the adjacent stent units 1000 will not fall off axially, and ensure that the medical stent has good axial pushability and retraction. When the medical stent is bent, the adjacent stent units 1000 do not affect each other. The adjacent stent units 1000 are movably connected through the stent connector 2000, which can ensure that the medical stent has good bending performance, so that the medical stent can be constructed with good flexibility. Thus, a medical stent with excellent flexibility, pushability, retraction, etc. is obtained. After the stent coating 3000 is set on the surface of the medical stent, it is applied to a curved blood vessel or shunt channel, so that the medical stent can conform to the anatomical structure of the blood vessel or other shunt channels in surgery, and will not cause the local blood flow rate to slow down, and will not form a local blood vortex effect, thereby avoiding the occurrence of thrombosis.

[0046] When a stent coating 3000 (such as PET, ePTFE) is provided on the surface of the medical stent, since the adjacent stent units 1000 in the medical stent can move with each other, the stent coating 3000 will not have a significant impact on the bending property of the medical stent. On the contrary, since the stent coating 3000 is connected to the medical stent, the structural stability of the connection between the adjacent stent units 1000 can be ensured, and the adjacent stent units 1000 will not fall off from each other due to the bending of the medical stent, so that the medical stent has good pushing and retracting properties in the axial direction.

[0047] The axial retractability of the medical stent refers to the fact that when the medical stent is assembled, it will be directly retracted into the delivery device to complete the assembly. The axial pushability of the medical stent refers to the fact that when the medical stent is released, it will be pushed into the target blood vessel in the body to complete the release.

[0048] The stent coating 3000 can cover the surface of at least a part of the stent unit element 1000 in the medical stent according to actual needs, and the stent unit element 1000 covered by the stent coating 3000 is connected to the stent coating 3000. The specific covering form and area are not limited. In one embodiment, the stent coating 3000 can cover the surface of all stent unit elements 1000, so that all stent unit elements 1000 are connected to the stent coating 3000. Among them, the stent coating 3000 can have one or more layers, which can cover one surface or both the inner and outer surfaces of the stent unit element 1000. For example, the stent coating 3000 can include at least one first coating body and at least one second coating body. The first coating body is used to cover the outer surface of the stent unit element 1000, and the second coating body is used to cover the inner surface of the stent unit element 1000. The stent unit element 1000 and the stent coating 3000 can be connected by suturing, bonding, welding, etc., which are not limited here.

[0049] By connecting adjacent stent units 1000 with the stent connector 2000, the medical stent can be broken down into smaller pieces, and the overall length of the medical stent can be adjusted by disassembling or assembling a corresponding number of stent units 1000. Therefore, there is no need to consider changing the number and structure of connecting rods in conventional stents to meet different medical needs and adapt to different patients. Independent stent units 1000 can be directly prepared during the production process, and the operator can flexibly adjust the number of stent units 1000 according to clinical needs when using it, thereby flexibly adjusting the axial length of the medical stent.

[0050] The bracket unit 1000 may be provided with a plurality of curved unit bodies 1000a connected along the annular circumference. The curved unit bodies 1000a may be in a regular V-shaped, wavy, or irregular curved structure. For example, the curved unit body 1000a may be a V-shaped bracket, such as Figure 1 As shown, the bracket unit 1000 includes a plurality of V-shaped brackets connected end to end in sequence along the annular circumference, and the bracket connector 2000 can be connected to the tip of the V-shaped bracket of the adjacent bracket unit 1000, or can be connected to the other ends or other positions of the V-shaped bracket, which is not limited here.

[0051] A plurality of bracket connectors 2000 may be disposed between adjacent bracket units 1000, and the plurality of bracket connectors 2000 are arranged along the annular circumference of the bracket unit units 1000. Figure 1 As shown, only one of the adjacent curved unit bodies may be provided with a bracket connector, so that a plurality of bracket connectors are arranged at intervals on a plurality of curved unit bodies along the annular circumference. The interval distribution can be referred to as Figure 1As shown in the figure, a bracket connector is arranged on every other curved unit body. In addition, a bracket connector can be arranged every two or three curved units. Moreover, the plurality of bracket connectors 2000 arranged along the annular circumference between adjacent bracket units 1000 constitute an annular group. The plurality of bracket connectors 2000 in the adjacent annular groups can be arranged as shown in the figure. Figure 1 In addition, those skilled in the art can also adjust the number of the bracket connectors 2000 and other connection and arrangement methods according to actual needs.

[0052] The support connector 2000 has a first connection position and a second connection position. According to the specific structure of the support connecting rod, the first connection position and the second connection position can be located at any two different positions of the support connector 2000. For example, when the support connector 2000 is a connecting rod, the two ends of the connecting rod can respectively constitute the first connection position and the second connection position. The first connection position of the support connector 2000 can be connected to the support unit 1000. The connection here can be a fixed connection. The support unit 1000 is provided with a first connection structure 1100a. The second connection position of the support connector 2000 is provided with a second connection structure 2100a. The first connection structure 1100a can be used to be detachably connected to the second connection structure 2100a. Moreover, the mutual connection between the first connection structure 1100a and the second connection structure 2100a is a movable connection, that is, the first connection structure 1100a and the second connection structure 2100a can form a mutually inseparable connection, but a certain degree of relative movement, such as relative rotation, can also be formed between the two.

[0053] In addition, in one embodiment, the bracket unit 1000 may be provided with an auxiliary rod 1100, and the length, size and material of the auxiliary rod 1100 may refer to the bracket connecting rod, wherein one end of the auxiliary rod 1100 is connected to the bracket unit 1000, and the other end of the auxiliary rod 1100 is provided with a first connecting structure 1100a. Thus, a movable connection between two adjacent bracket units 1000 can be formed through the bracket connecting rod and the auxiliary rod 1100. Those skilled in the art may select a suitable assembly method according to actual needs, which is not limited here.

[0054] like Figure 1 and Figure 2 As shown, the first connection structure 1100a and the second connection structure 2100a can respectively adopt an assembly slot and an assembly head, and the assembly head and the assembly slot are assembled and engaged with each other. Moreover, the assembly head can be rotated and engaged relative to the assembly slot along at least one rotation direction. For example, see Figure 1As shown, in one embodiment, the assembly chuck is a spherical chuck, the assembly slot is a spherical slot cavity, and the spherical chuck is rotatably assembled in the spherical slot cavity along multiple rotation directions. Figure 2 As shown, the assembly clamp is a square clamp, the assembly slot is a square slot cavity, and the square clamp rotates along a rotation direction to be assembled in the square slot cavity. Those skilled in the art can construct the first connection structure 1100a and the second connection structure 2100a according to actual needs, which is not limited here.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A medical stent, characterized in that: The medical stent comprises: At least two bracket units, each bracket unit having a deformation function and being able to be in a contracted state or an expanded state; A bracket connector, through which adjacent bracket units are movably connected, and the bracket connector is movable in a radial direction relative to the bracket unit; A stent coating is connected to at least one of the stent unit element and the stent connector, wherein the stent coating covers at least a portion of the surface of the stent unit element.

2. The medical support according to claim 1, characterized in that: The stent coating comprises at least one first coating body and at least one second coating body, wherein the first coating body covers the outer surface of the stent unit element, and the second coating body covers the inner surface of the stent unit element; and / or, The stent coating covers the surface of all the stent units, and the stent coating is connected to all the stent units; and / or, The stent unit element and the stent covering are sutured to each other.

3. The medical support according to claim 1, characterized in that: The bracket connector has a first connection position and a second connection position, the first connection position of the bracket connector is connected to the bracket unit, the bracket unit is provided with a first connection structure, the second connection position of the bracket connector is provided with a second connection structure, and the first connection structure is used to be detachably connected to the second connection structure.

4. The medical support according to claim 3, characterized in that: The bracket connecting member is a connecting rod, and the first connecting position and the second connecting position are two ends of the connecting rod respectively; And / or, an auxiliary rod is provided on the bracket unit, one end of the auxiliary rod is connected to the bracket unit, and the other end of the auxiliary rod is provided with the first connecting structure; And / or, the first connection structure and the second connection structure are respectively an assembly slot and an assembly clamp, and the assembly clamp and the assembly slot are assembled and clamped with each other.

5. The medical support according to claim 4, characterized in that: The assembly clamp head can be rotatably engaged relative to the assembly clamping groove along at least one rotation direction.

6. The medical support according to claim 5, characterized in that: The assembly chuck is a spherical chuck, the assembly slot is a spherical slot cavity, and the spherical chuck is assembled in the spherical slot cavity by rotating along multiple rotation directions; Alternatively, the assembly clamp is a square clamp, the assembly slot is a square slot cavity, and the square clamp is assembled in the square slot cavity by rotating along a rotation direction.

7. The medical support according to claim 1, characterized in that: The stent unit element is an annular element, the annular outer contour of the annular element can be contracted to present a contracted state, and the annular outer contour of the annular element can be expanded to present an expanded state; and / or, A plurality of the bracket connectors are disposed between adjacent bracket units, and the plurality of the bracket connectors are arranged in a ring shape along the bracket units.

8. The medical support according to claim 7, characterized in that: The bracket unit element includes a plurality of curved unit bodies, which are arranged in a ring shape, and only one of the adjacent curved unit bodies is provided with the bracket connector, so that the plurality of bracket connectors are arranged at intervals on the plurality of curved unit bodies along the circumferential direction of the ring.

9. The medical support according to claim 8, characterized in that: The bending unit body is a V-shaped bracket, and adjacent V-shaped brackets are connected end to end; and / or, The plurality of support connectors arranged in an annular circumferential direction between adjacent support unit elements form an annular group, and the plurality of support connectors in adjacent annular groups are staggered with each other.

10. The medical support according to claim 9, characterized in that: The support connector is connected to the tip of the V-shaped support; or, The support connector is connected to a position between any end and the tip of the V-shaped support.

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