CN217286202U - Medical stent and medical stent system - Google Patents
Medical stent and medical stent system Download PDFInfo
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- CN217286202U CN217286202U CN202220360242.1U CN202220360242U CN217286202U CN 217286202 U CN217286202 U CN 217286202U CN 202220360242 U CN202220360242 U CN 202220360242U CN 217286202 U CN217286202 U CN 217286202U
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Abstract
The utility model relates to a medical support and medical support system. The medical stent comprises a stent main body, wherein the stent main body is alternately woven by a single silk thread and comprises a plurality of first stent sections along the length direction of the stent main body, the first stent sections are provided with a plurality of stent vertexes and a plurality of stent edges, and the stent vertexes of two adjacent first stent sections are interlocked. The medical stent has better supporting performance and flexibility, and can also be matched with a spring ring to block the laceration of a diseased blood vessel.
Description
Technical Field
The utility model relates to a medical apparatus technical field especially relates to a medical support and medical support system.
Background
The aortic dissection refers to a true-false two-lumen separation state in which blood in an aortic lumen enters an aortic media from an aortic intimal tear position, so that the media is separated and expanded along the major axis direction of the aorta to form an aortic wall. Currently, the main treatment of aortic dissection is aortic endoluminal Repair surgery (EVAR).
In a descending aorta dissection (Stanford type B aorta dissection), the true lumen at the middle section and the distal end of the descending aorta is obviously compressed and narrowed, and a corresponding metal bare stent is generally selected clinically to perform distal end re-expansion of the true lumen, so as to achieve the purpose of remodeling the true lumen blood vessel. The traditional metal bare stent is composed of stent sections and connecting rods or is formed by laser cutting of a nickel-titanium metal tube. The metal bare bracket formed by combining the bracket section and the connecting rod has better bending degree but poorer supporting performance; the bare stent formed by cutting a nickel-titanium metal tube by laser has a weak bending degree, and the sharp vertex can damage blood vessels.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a medical stent and a medical stent system.
The utility model provides a medical support, includes the support main part, the support main part is worked out through single silk thread in turn to include a plurality of first support sections along self length direction, first support section has a plurality of support summits and a plurality of support arris, wherein adjacent two the support summits of first support section interlock.
In one embodiment, the medical stent further comprises at least one second stent section, the second stent section is arranged at the most distal end and/or the most proximal end of the stent main body, and the stent vertex of the second stent section is interlocked with the stent vertex of the first stent section at the most distal end and/or the most proximal end of the stent main body.
In one embodiment, the second stent section is a variable height stent section.
In one embodiment, the medical stent further comprises a tether for connecting corresponding two interlocked stent apexes to define a displacement amplitude corresponding to the first stent segment.
In one embodiment, the tie comprises at least one anchor connecting the two corresponding interlocking stent apices by a knot.
In one embodiment, the number of the fixing parts is multiple and is divided into multiple groups, and each group of the fixing parts are positioned at two ends of the same support edge;
the binding piece further comprises at least one reinforcing part, the reinforcing part is connected between the two fixing parts corresponding to the same group, and the reinforcing part is further wound on the support edge where the two fixing parts corresponding to the same group are located.
In one embodiment, the stent main body is provided with at least one group of the binding pieces along the self axial direction, and each group of the binding pieces is distributed along the circumferential direction of the stent main body.
In one embodiment, the tie-down is a zigzag structure distributed along the axial direction of the stent body.
In one embodiment, a plurality of the binding pieces are arranged on the stent main body, and the binding pieces penetrate through the stent main body along the direction from the proximal end to the distal end of the stent main body.
In one embodiment, the number of said binding elements is 2 and 2 said binding elements cross.
In one embodiment, a tip of the single wire is bent in a V-shape to weave a portion of a first stent section, then moved toward a proximal end or a distal end of the medical stent and bent in a V-shape to weave a portion of a second first stent section until a portion of an nth first stent section is woven, and then the remaining portion of the nth first stent section is woven and moved toward a distal end or a proximal end of the medical stent until the remaining portion of the other first stent section is woven;
wherein N is a positive integer greater than 1.
In one embodiment, the diameter of the stent main body is 13 mm-22 mm, and the number of stent ribs of the first stent section is 8-12;
or the diameter of the bracket main body is 24-34 mm, and the number of the bracket edges of the first bracket section is 12-14.
In one embodiment, the area of the mesh holes formed by enclosing between two adjacent first support sections is 20mm 2 ～40mm 2 The diameter of the support rib is 0.01-0.016 inch.
In one embodiment, the bending diameter of the vertex of the bracket is 1.2 mm-3 mm.
According to the medical stent, the stent main body can be alternately woven by the single silk threads to form an integrated structure, and the adjacent stent sections are interlocked, so that the supporting force of the stent main body is continuously transmitted from one end of the medical stent to the other end, wherein the interlocking structure between the stent sections provides good supporting force, and the weaving of the single silk threads has better bending capability; the medical stent is provided with a unique mesh design and can be matched with a spring ring with an anchoring device, so that the spring ring can be anchored on the medical stent better to achieve the effect of plugging a lesion blood vessel laceration. To sum up, the medical stent provided by the application has better supporting performance and compliance performance, and can also be matched with the spring ring to block the laceration of the diseased blood vessel.
A medical stent system comprising at least one spring coil and a medical stent as described in any of the above;
the spring ring is anchored at the mesh hole formed by the enclosure between two adjacent first bracket sections of the medical bracket.
According to the medical stent system, the stent main body can be alternately woven by the single silk threads to form an integrated structure, and the adjacent stent sections are interlocked, so that the supporting force of the stent main body is continuously transmitted from one end of the medical stent to the other end, wherein the interlocking structure among the stent sections provides good supporting force, and the weaving of the single silk threads has better bending capability; the medical stent is provided with a unique mesh design and can be matched with a spring ring with an anchoring device, so that the spring ring can be anchored on the medical stent better to achieve the effect of plugging a lesion blood vessel laceration. To sum up, the medical stent provided by the application has better supporting performance and compliance performance, and can also be matched with the spring ring to block the laceration of the diseased blood vessel.
Drawings
Fig. 1 is a schematic view of a partial structure of a medical stent according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating the distribution of meshes of a medical stent according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating an application of a medical stent according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating the application of the medical stent and the spring ring according to an embodiment of the present invention;
fig. 5 is a schematic structural view of the medical stent according to an embodiment of the present invention after being deployed;
FIG. 6 is an enlarged partial schematic view of FIG. 3;
fig. 7 is a schematic view illustrating a knitting process of a medical stent having 4 first stent sections according to an embodiment of the present invention;
FIG. 8 is an enlarged partial schematic view of FIG. 2 at A;
fig. 9 is a partially enlarged schematic view of a medical stent according to an embodiment of the present invention;
fig. 10 is a partial schematic view of a medical stent according to another embodiment of the present invention;
FIG. 11 is an enlarged partial schematic view of FIG. 10;
fig. 12 is a schematic view of the distribution of the binding members according to an embodiment of the present invention;
fig. 13 is a schematic view of the distribution of the binding members according to another embodiment of the present invention;
fig. 14 is a schematic view of a distribution of binding members according to another embodiment of the present invention;
fig. 15 is a schematic structural view of a medical stent system according to another embodiment of the present invention;
fig. 16 is a partially enlarged schematic view of a bracket according to an embodiment of the present invention.
Wherein the reference numerals in the drawings are as follows:
10. a medical stent; 100. a stent body; 100a, meshes; 110. a first support section; 110a, stent apex; 110b, a bracket edge; 111. a first carrier section; 112. a second first carrier section; 113. a third first carrier section; 114. a fourth first carrier section; 200. a tie down; 210. a fixed part; 220. a reinforcing part; 300. a spring ring; 400. a second stent section; A. the aorta; a1, true lumen; a2, false cavity; a3, crevasse.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1 to 14, an embodiment of the present invention provides a medical stent 10, where the medical stent 10 includes a stent main body 100; the stent main body 100 is alternately woven by a single silk thread and comprises a plurality of first stent sections 110 along the length direction thereof, each first stent section 110 has a plurality of stent vertexes 110a and a plurality of stent edges 110b, wherein the stent vertexes 110a of two adjacent first stent sections 110 are interlocked, that is, two stent edges 110b corresponding to the stent vertexes 110a of two adjacent first stent sections are interpenetrated.
The medical stent 10 can be applied to the field of treatment of aortic dissection aneurysms, as shown in fig. 3, the medical stent 10 can be implanted in a true lumen a1 of a descending aorta a to expand the true lumen a1, so as to achieve the purpose of remodeling a blood vessel of the true lumen a 1.
As an example, the stent body 100 is woven by a cylindrical jig including a plurality of rows of positioning pins arranged in the axial direction, each row of positioning pins including a plurality of positioning pins distributed in the circumferential direction of the cylindrical jig; the wire is repeatedly bent in a V-shape between adjacent rows of positioning pins to form the first bracket section 110 or to form part of the first bracket section 110 b. Referring to fig. 15, in any row of alignment pins except the first row and the last row, when the wire reaches the alignment pin at the vertex of one of the V-shapes, the wire crosses one side of the V-shape first (e.g., the wire passes from the side of one side away from the fixture, i.e., the wire presses against one side of the V-shape), and then crosses the other side of the V-shape (e.g., the wire passes from the side of the other side close to the fixture, i.e., the other side of the V-shape presses against the first wire), so that the wires at the alignment pins interlock, thereby achieving the interlocking of the stent vertices 110a of two adjacent first stent segments 110.
Specifically, as shown in fig. 5 and 6, a filament end of a single filament is bent in a V-shape to weave one portion of a first stent section 110, then moved toward the proximal or distal end of the medical stent and bent in a V-shape to weave one portion of a second first stent section 110 until one portion of an nth first stent section 110 is woven, and then the remaining portion of the nth first stent section 110 is woven and moved toward the distal or proximal end of the medical stent until the remaining portion of the other first stent section 110 is woven; wherein N is a positive integer greater than 1.
The following describes the knitting process of the stent body 100 by taking N equal to 4 as an example and starting knitting from the proximal end of the stent body 100:
as shown in fig. 7, when the first stent section 111 is woven, one end of the wire is fixed and the other end is moved in a clockwise direction (or counterclockwise direction) until a waved structure having a predetermined number of stent ribs is woven. The other end of the wire is then moved toward the distal end of the stent body 100 to begin braiding a second first stent segment 112. When weaving the second first stent segment 112, the other end of the wire is moved clockwise (or counterclockwise) until a wave structure having a predetermined number of stent ribs is woven, wherein the peaks of the valleys of the second first stent segment 112 are wound around the peaks of the first stent segment 111 during weaving so that the corresponding peaks and valleys are interlocked. The third first carrier section 113 and the fourth first carrier section 114 are then woven according to the above steps.
After the fourth first stent segment 114 is braided into a closed loop configuration, the other end of the wire is moved toward the proximal end of the stent body 100 to continue braiding the third first stent segment 113. When weaving the third first stent section 113, the other end of the wire is moved in a counterclockwise direction (or clockwise direction) until a closed loop structure is woven, wherein during weaving, the peak of the valley of the third first stent section 113 is to be passed around the peak of the second first stent section 112 to interlock the corresponding peak and valley. The second first carrier section 112 and the first carrier section 111 are then woven as described above. After the first carrier section 111 has been woven into a closed loop, the two ends of the wire are welded together using a metal tube. It should be noted that the ellipses in fig. 7 represent the stent ribs 110b and the stent vertexes 110a, which are not shown in each first stent segment 110; in addition, stent apices 110a throughout include trough apices and peak apices. In addition, arrows other than the arrow used for indicating the reference numeral in fig. 7 are used to indicate the filament head running of the wire.
As an example, the stent body 100 may be woven by a metal wire. The metal wire can be made of biocompatible metal materials such as nickel-titanium alloy, cobalt-nickel alloy, stainless steel and the like. After the stent main body 100 is woven, the two ends of the metal wire can be connected by welding or the like, and the two ends of the metal wire can be welded by the metal tube, so that the connection strength of the two ends can be ensured. Wherein, the material of the metal tube can be the same as or different from that of the metal wire.
The medical stent 10 can be applied to the field of treatment of descending aortic dissection aneurysm. The stent main body 100 can be alternately woven by single silk threads to form an integrated structure, and adjacent stent sections are interlocked, so that the supporting force of the stent main body 100 is continuously transmitted from one end of the medical stent 10 to the other end, wherein the interlocking structure between the stent sections provides good supporting force, and the weaving of the single silk threads has better bending capability; as shown in fig. 4, the medical stent 10 has a unique mesh design, and can be used in combination with the spring coil 300, so that the spring coil 300 can be better anchored on the medical stent 10 to achieve the function of blocking the lesion A3.
In conclusion, the medical stent 10 provided by the embodiment has better supporting performance and flexibility, and can be matched with the spring ring 300 to block the laceration a3 of the diseased blood vessel.
As shown in fig. 5, in some embodiments of the present invention, the medical stent 10 further comprises at least one second stent segment 400, the second stent segment 400 is disposed at the distal end and/or the proximal end of the stent main body 100, the stent vertex of the second stent segment 400 is interlocked with the stent vertex 110a of the first stent segment 110 located at the distal end and/or the proximal end of the stent main body 100, that is, the stent vertex of the second stent segment 400 is interlocked with the stent vertex 110a of the first stent segment 110 located at the distal end or the proximal end of the stent main body, or when both the distal end and the proximal end of the stent main body 100 are provided with the second stent segment 400, the stent vertex of the second stent segment 400 is interlocked with the stent vertex 110a of the first stent segment 110 located at the distal end and the proximal end of the stent main body 100. By providing the second stent section 400, the anchoring strength of the distal and/or proximal end of the medical stent 10 may be increased.
During fabrication, the second stent segment 400 may be prepared prior to interlocking the stent apices 110a of the distal and/or proximal first stent segment 110 with the stent apices of the second stent segment 400 while weaving the stent body 100. Wherein the stent apices of the second stent section 400 and the stent apices 110a of the first stent section 110 may interlock in the same manner as the stent apices 110a of two adjacent first stent sections 110.
Optionally, the distal end of stent body 100 is provided with multiple second stent segments 400 or one second stent segment 400, or the proximal end of stent body 100 is provided with multiple second stent segments 400 or one second stent segment 400. Optionally, both the distal and proximal ends of stent body 100 are provided with a second plurality of stent segments 400 or a second plurality of stent segments 400. Illustratively, the distal end of the stent body 100 is provided with a second stent segment 400, or the proximal end of the stent body 100 is provided with a second stent segment 400, or both the distal end and the proximal end of the stent body 100 are provided with a second stent segment 400. In addition, when the stent body 100 has the second stent section 400, the height of the stent rib of the second stent section 400 is greater than the height of the stent rib 110b of the first stent section 110, which facilitates the delivery of the medical stent 10 by the delivery device.
Optionally, the second stent section 400 is a tall stent section. The stent sections with the higher height mean that the stent edges of the stent sections have different lengths in the axial direction of the medical stent, so that the stent peaks at the peaks or the stent peaks at the valleys of the second stent section 400 are not located in the same circumferential direction of the second stent section 400. Illustratively, two adjacent stent apices at the crest of the second stent segment 400 are circumferentially staggered, while two stent apices spaced one stent apex between are circumferentially aligned. Through the setting of second support section 400 for becoming high support section, reduce radial holding power, prevent that the distal end breach from reissuing.
In some embodiments of the present invention, the diameter of the stent main body 100 is 13mm to 22mm (e.g., 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, etc.), and the number of stent ribs of the first stent section 110 is 8 to 12 (e.g., 8, 9, 10, 11, 12, etc.). Alternatively, the stent main body 100 has a diameter of 24mm to 34mm (e.g., 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31m, 32mm, 33mm, 34mm, etc.), and the number of stent ribs of the first stent section 110 is 12 to 14 (e.g., 12, 13, 14, 15, etc.). The diameter of the stent main body 100 and the number of the stent ribs 110b are set in this way, so that the medical stent 10 can have better flexibility and strength, and the stent peaks 110a can be prevented from pestling out of the medical stent 10.
Further, in some embodiments of the present invention, the area of the mesh 100a enclosed between two adjacent first frame sections 110 is 20mm 2 ～40mm 2 (e.g., 20 mm) 2 、25mm 2 、30mm 2 、35mm 2 、40mm 2 Etc.), the stent ribs 110b have a diameter of 0.01 inch to 0.016 inch (e.g., 0.01 inch, 0.011 inch, 0.012 inch, 0.013 inch, 0.014 inch, 0.015 inch, 0.016 inch, etc.). The area of the mesh openings 100a and the number of the stent ribs 110b are set in this way, so that the medical stent 10 can maintain a good supporting ability under the condition that the number of the stent ribs is included.
As shown in fig. 2 and 8, the mesh 100a has an area of (1/2) × the distance L between the stent apexes 110a 1 X distance L in the horizontal direction between two adjacent bracket edges 110b 2 . That is, the distance L between stent vertices 110a 1 In a proportional relationship with the number of stent ribs 110b, for example, the stent body 100 has a diameter of 16mm and the area of the mesh 100a is 30mm 2 Distance L between stent apexes 110a of a 10-sided stent 1 30/(16 × 3.14/10) × 2 ═ 12mm, that is to say 6mm in height of the frame edge 110 b.
In particular, in some embodiments of the present invention, the stent apex 110a has a curved diameter of 1.2mm to 3mm (e.g., 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, etc.). By setting the curved diameter of the stent apex 110a in this manner, adverse effects on the blood vessel due to too sharp stent apex 110a can be avoided. In knitting the medical stent 10, it may be knitted using a positioning needle, the installation position of which is used to form the stent apex 110a, so the diameter of the positioning needle may be the same as the bending diameter of the stent apex 110 a.
In some embodiments of the present invention, as shown in fig. 9-14, the medical stent further comprises a tie 200, the tie 200 being used to connect corresponding two interlocked stent vertices 110a to define a displacement amplitude corresponding to the first stent section 110. The tie 200 may reduce the degree of freedom of the stent apex 110a, and define the displacement amplitude of the corresponding first stent section 110, so that it may prevent the corresponding portion of the stent body 100 from being shortened due to the occurrence of stacking. Therefore, the medical stent provided by the embodiment can effectively prevent self from shortening on the premise of ensuring better flexibility.
As an example, the binding member 200 is disposed on the distal end of the stent body 100, or disposed in the middle of the stent body 100, or disposed on the proximal end of the stent body 100, or disposed on the proximal and distal ends of the stent body 100, or disposed on the proximal and middle of the stent body 100, or disposed on the distal and middle of the stent body 100, or disposed on the proximal, middle and distal ends of the stent body 100. The proximal end of the stent body 100 refers to the end of the stent body 100 close to the heart, the distal end of the stent body 100 refers to the end of the stent body 100 away from the heart, and the middle of the stent body 100 refers to the position between the proximal end and the distal end of the stent body 100. As an example, the tie 200 may be secured to the peak apex 100c of the distal-most or proximal-most first stent segment 110 and the stent apex of the second stent segment 400, and the tie 200 may also be secured to the peak apex 100c of the distal-most or proximal-most first stent segment 110 and the stent apex of the second stent segment 400.
Further, as shown in fig. 9, in some embodiments of the present invention, the binding member 200 includes at least one fixing portion 210, and the fixing portion 210 connects the corresponding two interlocked stent vertexes 110a by knotting. The fixing part 210 of the binder 200 is fixed to the two interlocked stent apexes 110a by means of a knot, which facilitates the processing of the medical stent 10. Of course, in other embodiments, the tie down 200 may be a solder pad, and the two interlocked stent vertices 110a are fixed by welding.
Alternatively, the fixing portion 210 may be made of a biocompatible material such as polymer (e.g., PET, ePTFE), metal (e.g., nitinol, cobalt-nickel alloy, stainless), etc.
Alternatively, two corresponding stent vertexes 110a of two adjacent first stent segments 110 may be knotted to form the anchoring portion 210, or the positions where the stent ridges 110b of the beginning and ending ends of the stent segments intersect may be knotted to form the anchoring portion 210. It is also possible to tie the corresponding two stent apexes 110a of the two adjacent first stent segments 110 to form the anchoring portions 210, and tie the intersecting positions of the stent ridges 110b of the beginning and ending ends of the stent segments to form the anchoring portions 210.
Optionally, the number of the fixing portions 210 on each first rack segment 110 is 0.25 to 1 times, for example, 0.25, 0.5, 0.75, 1 times the number of the rack edges of the first rack segment 110. By setting the number of the fixing portions 210 on each first bracket section 110 in this way, the displacement amplitude of the first bracket section 110 can be effectively limited.
Further, in some embodiments of the present invention, as shown in fig. 10, the number of the fixing portions 210 is multiple and divided into multiple groups, and each group of the fixing portions 210 is located at two ends of the same bracket edge 110 b; the binding member 200 further includes at least one reinforcing portion 220, the reinforcing portion 220 is connected between two fixing portions 210 corresponding to the same group, and the reinforcing portion 220 is further wound around the bracket rib 110b where the two fixing portions 210 of the same group are located. The binding member 200 of this type of structure makes the stent apex 110a not easily staggered, thereby preventing the fixing part 210 from knotting and failing.
Alternatively, the reinforcing portion 220 may be made of a biocompatible material such as polymer (e.g., PET, ePTFE), metal (e.g., nitinol, cobalt-nickel alloy, stainless), etc., and the material may be the same as or different from that of the fixing portion 210. Preferably, the fixing portion 210 and the reinforcing portion 220 are made of the same material, so that the fixing portion and the reinforcing portion can be formed by winding a wire around the stent rib 110b and the stent apex 110a, which is beneficial to the production and processing of the medical stent 10 and can be used for rapid banding.
With respect to the distribution of the tie-down 200, two examples are given:
the first method comprises the following steps: as shown in fig. 12 and 13, the stent body 100 is provided with at least one set of constraining units 200 along its own axial direction, and each set of constraining units 200 is distributed along the circumferential direction of the stent body 100. The distribution of the binding members 200 can ensure that the medical stent 10 has certain strength and flexibility.
Specifically, the number of groups of the binding members 200 at the proximal end of the stent body 100 is greater than or equal to 1 (e.g., 1 group, 2 groups, etc.), or the number of groups of the binding members 200 at the middle of the stent body 100 is greater than or equal to 1 (e.g., 1 group, 2 groups, 3 groups, or 4 groups, etc.), or the number of groups of the binding members 200 at the distal end of the stent body 100 is greater than or equal to 1, e.g., 1 group, 2 groups, 3 groups, or 4 groups, etc.). In some embodiments, the number of sets of tethers 200 located at the proximal end, distal end, and middle of the stent body 100 is greater than or equal to 1 (e.g., 1, 2, 3, or 4, etc.). In other embodiments, the tethers 200 are located at two of the proximal, distal, and medial portions of the stent body, and the number of sets of tethers 200 is greater than or equal to 1 (e.g., 1 set, 2 sets, 3 sets, or 4 sets, etc.). So set up group's number of constraint piece 200, not only make the intensity of medical support 10 guarantee, can also guarantee that medical support 10 is whole to have certain compliance, this is because set up constraint piece 200 on medical support 10 for medical support's displacement reduces and can improve its holding power, and constraint piece 200 sets up in at least one position in medical support 10's near-end, distal end and the middle part again, does not locate all support sections of medical support 10, has guaranteed medical support's compliance.
Optionally, the number of tie members 200 per set is 0.25 to 0.5 times, e.g. 0.25, 0.3, 0.4, 0.5 times the number of stent ribs of the first stent section 110. By thus setting the number of tie-down members 200 per first carrier section 110, the displacement amplitude of the first carrier section 110 can be effectively limited.
Alternatively, the binder 200 is a W-shaped structure distributed along the axial direction of the stent body 100, a straight-line structure shown in fig. 12, or a zigzag structure shown in fig. 13. Preferably, the tie-down members 200 are zigzag structures distributed along the axial direction of the stent main body 100, and the tie-down members 200 of the structure not only use less material, but also effectively limit the displacement amplitude of the first stent section 110.
And the second method comprises the following steps: as shown in fig. 14, a plurality of binding members 200 are disposed on the stent body 100, and the binding members 200 penetrate the stent body 100 in the proximal-to-distal direction of the stent body 100. Compared to the first example, the distribution of the binder 200 can increase the strength of the medical stent 10.
Alternatively, as shown in fig. 14, the number of the binder 200 is 2 and 2 binders 200 are crossed. The distribution of the binding members 200 can ensure the flexibility of the medical stent 10.
Another embodiment of the present invention provides a medical stent system, as shown in fig. 15, comprising at least one spring coil 300 and a medical stent 10 as described in any one of the above; the spring coil 300 is anchored to the mesh openings 100a formed between adjacent first stent sections 110 of the medical stent 10.
With respect to the number of coils 300, the number of vascular lacerations a3 is primarily a function of the number thereof.
The medical stent 10 can be applied to the field of treatment of descending aortic dissection aneurysm. The stent main body 100 can be alternately woven by single silk threads to form an integrated structure, and adjacent stent sections are interlocked, so that the supporting force of the stent main body 100 is continuously transmitted from one end of the medical stent 10 to the other end, wherein the interlocking structure between the stent sections provides good supporting force, and the single silk threads have better bending capability in weaving; as shown in fig. 4, the medical stent 10 has a unique mesh design, and can be used in combination with the spring coil 300, so that the spring coil 300 can be better anchored on the medical stent 10 to achieve the function of blocking the lesion A3.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (15)
1. A medical stent is characterized by comprising a stent main body (100), wherein the stent main body (100) is formed by alternately weaving single silk threads and comprises a plurality of first stent sections (110) along the length direction of the stent main body, the first stent sections (110) are provided with a plurality of stent vertexes (110a) and a plurality of stent edges (110b), and the stent vertexes (110a) of two adjacent first stent sections (110) are interlocked.
2. The medical stent of claim 1, wherein the medical stent (10) further comprises at least one second stent segment (400), the second stent segment (400) being disposed at a distal end and/or a proximal end of the stent body (100), the stent apex of the second stent segment (400) interlocking with the stent apex (110a) of the first stent segment (110) at the distal end and/or the proximal end of the stent body (100).
3. The medical stent of claim 2, wherein the second stent section (400) is a variable height stent section.
4. The medical stent of any one of claims 1-3, further comprising a tie (200), the tie (200) for connecting corresponding two interlocked stent apexes (110a) to define a displacement amplitude corresponding to the first stent segment (110).
5. The medical stent according to claim 4, wherein the binder (200) comprises at least one anchor (210), the anchor (210) connecting the corresponding two interlocked stent apices (110a) by means of a knot.
6. The medical stent as set forth in claim 5, wherein the number of the fixing portions (210) is plural and divided into plural groups, each group of the fixing portions (210) being located at both ends of the same stent rib (110 b);
the binding piece (200) further comprises at least one reinforcing part (220), the reinforcing part (220) is connected between the two corresponding fixing parts (210) in the same group, and the reinforcing part (220) is further wound on the support edge (110b) where the two fixing parts (210) in the same group are located.
7. The medical stent according to claim 6, wherein the stent main body (100) is provided with at least one set of the tie pieces (200) along the self axial direction, and each set of the tie pieces (200) is distributed along the circumferential direction of the stent main body (100).
8. The medical stent according to claim 7, wherein the binder (200) is a zigzag structure distributed along an axial direction of the stent body (100).
9. The medical stent according to claim 6, wherein a plurality of the binder (200) is provided on the stent main body (100), and the binder (200) penetrates the stent main body (100) in a proximal-to-distal direction of the stent main body (100).
10. The medical stent according to claim 9, wherein the number of said tethers (200) is 2 and 2 of said tethers (200) are crossed.
11. The medical stent according to any one of claims 1 to 3, wherein one filament end of the single filament is bent in a V-shape to weave a portion of a first stent segment (110), and then moved toward a proximal end or a distal end of the medical stent and bent in a V-shape to weave a portion of a second first stent segment (110) until a portion of an Nth first stent segment (110) is woven, and then the weaving of the remaining portion of the Nth first stent segment (110) is continued and moved toward a distal end or a proximal end of the medical stent until the remaining portion of the other first stent segment (110) is woven;
wherein N is a positive integer greater than 1.
12. The medical stent according to any one of claims 1 to 3, wherein the diameter of the stent main body (100) is 13mm to 22mm, and the number of stent ribs of the first stent section (110) is 8 to 12;
or the diameter of the bracket main body (100) is 24-34 mm, and the number of the bracket edges of the first bracket section (110) is 12-14.
13. The medical stent of claim 12, wherein the area of the mesh (100a) enclosed between two adjacent first stent sections (110) is 20mm 2 ～40mm 2 The diameter of the support rib (110b) is 0.01-0.016 inch.
14. The medical stent according to any one of claims 1 to 3, wherein the stent apex (110a) has a curved diameter of 1.2mm to 3 mm.
15. A medical stent system comprising at least one coil (300) and a medical stent (10) according to any one of claims 1 to 14;
the spring ring (300) is anchored at a mesh (100a) formed by the surrounding between two adjacent first stent sections (110) of the medical stent (10).
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| CN202220360242.1U CN217286202U (en) | 2022-02-22 | 2022-02-22 | Medical stent and medical stent system |
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| CN202220360242.1U CN217286202U (en) | 2022-02-22 | 2022-02-22 | Medical stent and medical stent system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023160510A1 (en) * | 2022-02-22 | 2023-08-31 | 上海微创心脉医疗科技(集团)股份有限公司 | Medical stent and medical stent system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023160510A1 (en) * | 2022-02-22 | 2023-08-31 | 上海微创心脉医疗科技(集团)股份有限公司 | Medical stent and medical stent system |
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