CN217593160U - Medical support - Google Patents

Abstract

The utility model provides a medical bracket, which comprises a naked bracket, wherein the naked bracket comprises a basic unit; the bare stent comprises a proximal section, a middle section and a distal section which are sequentially connected along the axial direction of the medical stent; wherein the proximal section and the distal section respectively comprise at least one stent ring, and the stent ring comprises a plurality of base units which are arranged along the circumferential direction of the medical stent and are sequentially connected end to end; the middle section comprises a spiral structure, and the spiral structure comprises a plurality of base units which are spirally arranged around the axis of the medical support and are sequentially connected. The medical stent has good support property and flexibility, and can be suitable for blood vessels of various forms.

Description

Medical support

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to medical support.

Background

Since the first Percutaneous Transluminal Angioplasty (PTA) was performed in 1977, the interventional therapy technology has been rapidly developed and widely applied to the treatment of various vascular stenoses such as pulmonary artery, coronary artery, lower limb artery, and the like. However, PTA also has certain drawbacks, such as high stenosis rate, low success rate of surgery, etc., so that stent implantation is developed on the basis of PTA at present, and has the advantages of reliable effect, simple method, small wound, less pain of patients, quick recovery, etc., so that the quality of lumen stenosis has significant advantages.

The currently common medical stents are divided into two types according to the release mode: self-expanding stents and balloon expandable stents (i.e., balloon expandable stents). The self-expanding stent is mostly made of high-elasticity materials such as nickel-titanium alloy, has the advantage of strong flexibility, but has poor accuracy in releasing and insufficient supporting force. The balloon expandable stent is generally made of 316L stainless steel or L605 cobalt-chromium alloy, is positioned accurately when released, has strong supporting force, but has poor flexibility and is difficult to adapt to the complex shape of a blood vessel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a medical support, this medical support have better holding power and location accuracy to good compliance still has.

In order to achieve the above object, the utility model provides a medical stent, which comprises a bare stent, wherein the bare stent comprises a basic unit; the bare stent comprises a proximal section, a middle section and a distal section which are sequentially connected along the axial direction of the medical stent; wherein the content of the first and second substances,

the proximal section and the distal section respectively comprise at least one stent ring, and the stent ring comprises a plurality of base units which are arranged along the circumferential direction of the medical stent and are sequentially connected;

the middle section comprises a spiral structure, and the spiral structure comprises a plurality of base units which are spirally arranged around the axis of the medical support and are sequentially connected.

Optionally, the bare stent further comprises a first connector; in the circumferential direction of the medical support, two adjacent foundation units are connected through the first connecting piece.

Optionally, the first connecting member is at least one of linear, n-shaped, V-shaped, or Ω -shaped.

Optionally, the bare stent further comprises a second connecting piece, wherein the second connecting piece is linear and extends along the axial direction of the medical stent;

at least one of the second connectors has its axial ends connected to the proximal end section and a proximal-most helical turn of the helical structure, respectively; and/or, the axial two ends of at least one second connector are respectively connected with the distal end section and one spiral turn of the spiral structure which is closest to the distal end.

Optionally, both axial ends of the second connecting member are respectively connected with the two base units.

Optionally, at least one of the base units on a proximal-most one of the helical turns of the helical structure is connected with the proximal section such that the intermediate section partially overlaps the proximal section in an axial direction of the medical stent; and/or the presence of a gas in the atmosphere,

at least one of the base units on a coil turn of the helical structure closest to the distal end is connected with the distal section such that the intermediate section partially overlaps the distal section in an axial direction of the medical stent.

Optionally, at least one of said base units on a proximal-most one of said helical turns of said helical structure is partially inter-embedded with a corresponding said base unit on said proximal section; and/or the presence of a gas in the gas,

at least one of the base units on the most distal one of the helical turns of the helical structure is partially embedded with a corresponding base unit on the distal segment.

Optionally, the shape of the base unit is at least a portion of a prism, or the shape of the base unit is a wave.

Optionally, the medical stent is a balloon expandable stent.

Optionally, the medical stent further comprises a covering membrane, and the covering membrane is covered on the circumferential surface of the bare stent.

Compared with the prior art, the utility model discloses a medical support has following advantage:

the medical stent comprises a bare stent, wherein the bare stent comprises a base unit; the bare stent handle controls a proximal section, a middle section and a distal section which are sequentially connected along the axial direction of the medical stent; wherein the proximal section and the distal section respectively comprise at least one stent ring, and the stent ring comprises a plurality of base units which are arranged along the circumferential direction of the medical stent and are sequentially connected end to end; the middle section comprises a spiral structure, the spiral structure comprises a plurality of basic units which are spirally arranged around the axis of the medical support and are sequentially connected, namely the middle section comprises a spiral structure, the flexibility of the medical support is improved through the spiral structure, so that the medical support can be bent in any direction as required to adapt to different shapes of blood vessels, and further adapt to more vascular lesions.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1 is a schematic plan view of a bare stent of a medical stent provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic partially expanded plan view of a bare stent of a medical stent according to an embodiment of the present invention, in which a first connecting member is n-shaped;

fig. 3 is a schematic partially expanded plan view of a bare stent of a medical stent according to an embodiment of the present invention, showing a first connector in an omega shape;

fig. 4 is a schematic plan view of a bare stent of a medical stent according to an embodiment of the present invention, showing a proximal segment partially coincident with a middle segment and a distal segment partially coincident with the middle segment.

[ reference numerals are described below ]:

100-bare stent, 110-proximal segment, 120-middle segment, 130-distal segment, 101-base unit, 101 a-first base unit, 101 b-second base unit, 101 c-third base unit, 101 d-fourth base unit, 101 e-fifth base unit, 101 f-sixth base unit, 101 g-seventh base unit, 101 h-eighth base unit, 102-first connecting member, 103-second connecting member, 103 a-first sub-connecting member, 103 b-second sub-connecting member.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and are not to precise scale, which is only used for the purpose of facilitating and clearly explaining the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

Fig. 1 is a schematic plane view showing a medical stent according to an embodiment of the present invention. As shown in fig. 1, the medical stent includes a bare stent 100, the bare stent 100 includes a base unit 101, and the bare stent 100 includes a proximal section 110, a middle section 120, and a distal section 130, which are sequentially connected in an axial direction of the medical stent. Wherein the proximal section 110 and the distal section 130 each comprise at least one stent ring 111, and the stent ring 111 comprises a plurality of the base units 101 arranged along the circumference of the medical stent and connected in sequence. The intermediate section 120 includes a plurality of the base units 101 spirally arranged around the axis of the medical stent and connected in sequence.

It is understood that, when viewed along the axial direction of the medical stent, the stent ring 111 is a closed ring, which may be circular, and in addition, the stent ring 111 may include 6, 8, or 10 rings, which is not particularly limited in this embodiment. When the medical stent is implanted in a blood vessel, the proximal section 110 and the distal section 130 are configured to conform to the wall of the blood vessel over the entire circumference of the medical stent to position the medical stent at a predetermined location in the blood vessel. On the intermediate section 120, a plurality of the base units 101 are arranged spirally around the axis of the medical stent such that the intermediate section 120 comprises a spiral structure, which provides the intermediate section 120 with good flexibility, so that the intermediate section 120 can be bent as desired at a predetermined position within the blood vessel and abut against the wall of the blood vessel to adapt to the morphology of the blood vessel. Also, during delivery of the medical stent, the intermediate section 120 may be more flexible to allow the medical stent to pass through tortuous vessels to reach the predetermined location.

Preferably, the medical stent is a ball-expanding stent, so that the medical stent has good flexibility and support performance, and the positioning accuracy of the medical stent is higher when the medical stent is released. Here, the "balloon stent" is referred to a self-expandable stent, and the balloon stent means that the medical stent is expanded by a radial expansion force provided by a balloon. For the ball expanded stent, the bare stent 100 may be made of cobalt chrome alloy such as L605 cobalt chrome alloy, or 316L stainless steel (specifically 316LVM stainless steel).

The number of the stent rings 111 included in the proximal segment 110 and the distal segment 130 is not particularly limited by the embodiments of the present invention. In some implementations, at least one of the proximal segment 110 and the distal segment 130 includes more than two of the stent rings 111, it being understood that here, more than two of the stent rings 111 on the proximal segment 110 are interconnected and more than two of the stent rings 111 on the distal segment 130 are interconnected. In other implementations, the proximal segment 110 and the distal segment 130 each include one of the stent rings 111 (shown in fig. 1). The proximal section 110 and the distal section 130 are illustrated as including one stent ring 111.

Optionally, the shape of the base unit 101 is at least a part of a predetermined shape, and the predetermined shape includes, but is not limited to, a prismatic shape, a wave shape, and the like, that is, the shape of the base unit 101 may be a prismatic shape, or a part of a prismatic shape (in a case that at least one edge of the prismatic shape is cut), or a wave shape, and the like. The base unit 101 having such a shape can increase the contact area of the medical stent with the vessel wall, further improving the supporting performance.

It is understood that the bare stent 100 also includes a first connector 102. In the circumferential direction of the medical stent, two adjacent base units 101 are connected by the first connecting member 102. The embodiment of the present invention does not particularly limit the specific shape of the first connecting member 102, and the first connecting member 102 may include at least one of a straight rod (as shown in fig. 1, when viewed from the plane development view of the bare stent 100, the first connecting member 102 is a linear structure), an n-shaped rod (as shown in fig. 2), an Ω -shaped rod (as shown in fig. 3), and a V-shaped rod (as shown in fig. 4). In addition, all the first connectors 102 on the spiral structure are arranged spirally around the axis of the medical stent and are located on the same spiral line.

It is known to those skilled in the art that if the medical stent is axially elongated during crimping, problems with inaccurate positioning may easily occur when the medical stent is released and expanded in a blood vessel. In view of this, in a specific implementation manner of the embodiment of the present invention, the bare stent 100 further includes a second connecting member 103, and the second connecting member 103 is used to reduce the axial elongation of the medical stent during the crimping process.

Specifically, the helical structure of the intermediate section 120 comprises a plurality of helical turns. The second connecting member 103 is linear and extends along the axial direction of the medical stent. At least one of the second connectors 103 is connected at both axial ends to the proximal-most one of the coils of the proximal section 110 and the intermediate section 120. By the limitation of the second connector 103, the elongation rate of the proximal portion of the middle section 120 in the crimping process of the medical stent can be reduced, and the positioning accuracy of the medical stent during releasing can be improved. It is further preferable that both axial ends of at least one of the second connectors 103 are connected to the proximal one of the coils of the intermediate section 120 and the distal section 130 to reduce the elongation of the distal end portion of the intermediate section 120 during crimping of the medical stent.

The second connector 103 connecting the proximal section 110 and the intermediate section 120 is referred to as a first sub-connector 103a, and the second connector 103 connecting the intermediate section 120 and the distal section 130 is referred to as a second sub-connector 103b. The embodiment of the present invention does not particularly limit the specific number of the first sub-connecting member 103a and the second sub-connecting member 103b, and the first sub-connecting member 103a may be one, two, or three or more, and similarly, the second sub-connecting member 103b may be one, two, or three or more. In addition, the connection position of any end of the second connector 103 and the corresponding segment is not particularly limited, and as shown in fig. 1, for example, the proximal end of the first sub-connector 103a is connected to one of the base units 101 on the proximal segment, the distal end of the first sub-connector 103a is connected to one of the base units 101 on the proximal coil of the spiral structure, the proximal end of the second sub-connector 103b is connected to one of the base units 101 on the distal coil of the spiral structure, and the distal end of the second sub-connector 103b is connected to one of the base units 101 on the distal segment 130.

Referring to fig. 4, in an alternative implementation of the embodiment of the present invention, at least one of the base units 101 of the proximal-most one of the spiral turns of the spiral structure is connected to the proximal section 110, such that the intermediate section 120 partially overlaps the proximal section 110. In doing so, the elongation rate of the proximal portion of the intermediate section 120 may also be reduced during crimping of the medical stent. Likewise, at least one of the base units 101 of the most distal one of the helical turns of the helical structure may be connected with the distal section 130 such that the intermediate section 120 partially overlaps the distal section 130, thereby reducing the elongation of the distal portion of the intermediate section 120 during crimping of the medical stent.

Optionally, at least one of the base units 101 on the proximal-most one of the coils of the helical structure is partially embedded with the corresponding base unit 101 on the proximal segment 110. And at least one of said base units 101 on the most distal one of said helical turns of said helical structure is partially embedded with a corresponding one of said base units 101 on said distal segment 130.

In detail, with continued reference to fig. 4, the predetermined shape is shown as a prism, and the intermediate section 120 has two base units 101 connected to the proximal section 110, wherein the two base units 101 may be referred to as a first base unit 101a and a second base unit 101b, respectively. The first base unit 101a is located at a proximal end of the helical structure, and the second base unit 101b is adjacent to the first base unit 101a in a circumferential direction of the medical stent. The first base unit 101a and one of the base units 101 on the proximal segment 110 (the base unit 101 may be referred to as a third base unit 101 c) are partially embedded in each other, and both edges of the first base unit 101a may be truncated by the third base unit 101c such that the first base unit 101a is a part of a prism. The second base unit 101b is partially embedded in the other base unit 101 (the base unit 101 may be referred to as a fourth base unit 101 d) of the proximal segment 110, and two edges of the second base unit 101b may be truncated by the fourth base unit 101d, so that the second base unit 101b is a part of a prism. Similarly, two base units 101 are connected to the distal section 130 on the middle section 120, the two base units 101 may be referred to as a fifth base unit 101e and a sixth base unit 101f, the sixth base unit 101f is located at the distal end of the spiral structure, and the fifth base unit 101e and the sixth base unit 101f are adjacent to each other in the circumferential direction of the medical stent. The fifth base unit 101e is partially embedded in one of the base units 101 (the base unit 101 may be referred to as a seventh base unit 101 g) of the distal segment 130, and two edges of the fifth base unit 101e may be truncated by the seventh base unit 101g such that the fifth base unit 101e is in the shape of a part of a prism. The sixth base unit 101f is partially embedded with another base unit 101 (which may be referred to as an eighth base unit 101 h) on the distal segment 130, and two edges of the sixth base unit 101f may be truncated by the eighth base unit 101h, so that the sixth base unit 101f is in the shape of a part of a prism. It will be understood by those skilled in the art that it is also possible when the first base unit is shaped as a prism and the first base unit intercepts two edges of the third base unit such that the third base unit is shaped as a part of a prism (not shown). Similarly, the shape of second basic unit can be the prism, just second basic unit will two arriss of fourth basic unit are cuted, so that the shape of fourth basic unit is partly of prism, the shape of fifth basic unit is the prism, just fifth basic unit will two arriss of seventh basic unit are cuted, so that the shape of seventh basic unit is partly of prism, and the shape of sixth basic unit is the prism, just the sixth basic unit will two arriss of eighth basic unit are cuted, so that the shape of eighth basic unit is partly of prism.

In addition, in this alternative implementation, the bare stent may also include the second connector, for example, both the first sub-connector and the second sub-connector (not shown in the figures).

Further, the medical stent may further include a coating film (not shown in the drawings), which is coated on a circumferential surface of the bare stent 100, for example, the coating film is disposed on an outer circumferential surface of the bare stent 100, or is disposed on an inner circumferential surface of the bare stent 100, or is disposed on both the outer circumferential surface and the inner circumferential surface of the bare stent 100.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A medical stent, comprising a bare stent comprising a base unit; the bare stent comprises a proximal section, a middle section and a distal section which are sequentially connected along the axial direction of the medical stent; wherein the content of the first and second substances,

the proximal section and the distal section respectively comprise at least one stent ring, and the stent ring comprises a plurality of base units which are arranged along the circumferential direction of the medical stent and are sequentially connected;

the middle section comprises a spiral structure, and the spiral structure comprises a plurality of base units which are spirally arranged around the axis of the medical support and are sequentially connected.

2. The medical stent of claim 1, wherein the bare stent further comprises a first connector; in the circumferential direction of the medical support, two adjacent base units are connected through the first connecting piece.

3. The medical stent of claim 2, wherein the first connectors are at least one of linear, n-shaped, V-shaped, or Ω -shaped.

4. The medical stent of claim 1, wherein the bare stent further comprises a second connector, the second connector being linear and extending in an axial direction of the medical stent;

at least one of the second connectors has its axial ends connected to the proximal end section and a proximal-most helical turn of the helical structure, respectively; and/or, the axial two ends of at least one second connector are respectively connected with the distal end section and one spiral turn of the spiral structure which is closest to the distal end.

5. The medical stent according to claim 4, wherein both axial ends of the second connector are connected to the two base units, respectively.

6. The medical stent of claim 1 or 4, wherein at least one of the base units on a proximal-most one of the helical structures is connected to the proximal section such that the intermediate section partially overlaps the proximal section in an axial direction of the medical stent; and/or the presence of a gas in the gas,

at least one of the base units on a coil turn of the helical structure closest to the distal end is connected with the distal section such that the intermediate section partially overlaps the distal section in an axial direction of the medical stent.

7. The medical stent of claim 6, wherein at least one of the base units on a proximal-most one of the helical structures is partially nested with a corresponding base unit on the proximal segment; and/or the presence of a gas in the atmosphere,

at least one of the base units on the most distal one of the helical turns of the helical structure is partially embedded with a corresponding base unit on the distal segment.

8. The medical stent of claim 1, wherein the base unit is at least a portion of a prismatic shape or the base unit is a wave shape.

9. The medical stent of claim 1, wherein the medical stent is a balloon stent.

10. The medical stent of claim 1, further comprising a cover membrane coated on a circumferential surface of the bare stent.

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