CN116616970A - Medical support and medical support system - Google Patents
Medical support and medical support system Download PDFInfo
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- CN116616970A CN116616970A CN202210163879.6A CN202210163879A CN116616970A CN 116616970 A CN116616970 A CN 116616970A CN 202210163879 A CN202210163879 A CN 202210163879A CN 116616970 A CN116616970 A CN 116616970A
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- tie down
- support
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- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000009954 braiding Methods 0.000 claims description 7
- 210000004204 blood vessel Anatomy 0.000 abstract description 9
- 230000003902 lesion Effects 0.000 abstract description 7
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 208000002251 Dissecting Aneurysm Diseases 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 7
- 206010002895 aortic dissection Diseases 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009940 knitting Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910001000 nickel titanium Inorganic materials 0.000 description 5
- 206010002329 Aneurysm Diseases 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 210000000709 aorta Anatomy 0.000 description 2
- 210000002376 aorta thoracic Anatomy 0.000 description 2
- 239000000560 biocompatible material Substances 0.000 description 2
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
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- 150000002739 metals Chemical class 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- 238000001356 surgical procedure Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
Abstract
The application relates to a medical support and a medical support system. The medical support comprises a support body, wherein the support body is alternately woven by single silk wires and comprises a plurality of first support sections along the length direction of the support body, each first support section is provided with a plurality of support peaks and a plurality of support edges, and the support peaks of two adjacent first support sections are interlocked. The medical stent has good supporting performance and flexibility, and can also be matched with a spring ring to seal the breach of a lesion blood vessel.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a medical support and a medical support system.
Background
Aortic dissection refers to a state in which blood in the aortic lumen enters the aortic intima from the aortic intima tear, so that the media is separated and expands along the long axis direction of the aorta to form true and false two-lumen separation of the aortic wall. Currently, the primary treatment for aortic dissection is aortic endoluminal repair surgery (EVAR, endovascular Aneurysm Repair).
In the descending aortic dissection (Stanford B-type aortic dissection), obvious compression and narrowing can occur to the middle section and the distal end of the descending aorta, and a corresponding metal bare stent is generally selected for distal end re-dilation of the vacuum lumen in clinic so as to achieve the purpose of remodelling the vacuum vessel. The traditional metal bare bracket consists of a bracket section and a connecting rod, or is formed by cutting a nickel-titanium metal tube by laser. The metal bare bracket formed by combining the bracket section and the connecting rod has better bending degree, but has poorer supporting performance; the bare stent cut by the nickel titanium metal tube has weaker bending degree, and the sharp vertex can damage the blood vessel.
Disclosure of Invention
In view of the above, it is desirable to provide a medical stent and a medical stent system.
The medical support comprises a support main body, wherein the support main body is woven by single silk wires alternately and comprises a plurality of first support sections along the length direction of the support main body, each first support section is provided with a plurality of support peaks and a plurality of support edges, and the support peaks of two adjacent first support sections are interlocked.
In one embodiment, the medical stent further comprises at least one second stent segment disposed at the distal-most and/or proximal-most end of the stent body, the stent apices of the second stent segment interlocking with the stent apices of the first stent segment at the distal-most and/or proximal-most end of the stent body.
In one embodiment, the second bracket section is an elevated bracket section.
In one embodiment, the medical stent further comprises a tie-down for connecting the stent apices corresponding to the two interlocks to define the displacement amplitude corresponding to the first stent segment.
In one embodiment, the tie down comprises at least one fixation portion connecting the stent apices of the corresponding two interlocks by knotting.
In one embodiment, the fixing parts are multiple in number and divided into multiple groups, and each group of fixing parts is positioned at two ends of the same support rib;
the binding piece further comprises at least one reinforcing part, wherein 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 edges where the two fixing parts are located.
In one embodiment, the bracket main body is provided with at least one group of binding pieces along the axial direction of the bracket main body, and each group of binding pieces is distributed along the circumferential direction of the bracket main body.
In one embodiment, the tie down is a zigzag structure distributed along the axial direction of the stent body.
In one embodiment, the stent body is provided with a plurality of binding members which penetrate the stent body in a direction from the proximal end to the distal end of the stent body.
In one embodiment, the number of tie down members is 2 and 2 tie down members intersect.
In one embodiment, a spinneret of the single wire is bent in a V-shape to weave a portion of a first stent section, then moved toward the proximal or 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, then continuing to weave the remaining portion of the nth first stent section and moved toward the distal or 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 bracket main body is 13 mm-22 mm, and the number of the bracket edges of the first bracket 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 formed between two adjacent first bracket sections is 20mm 2 ～40mm 2 The diameter of the support rib is 0.01 inch-0.016 inch.
In one embodiment, the curved diameter of the stent apices is 1.2mm to 3mm.
According to the medical support, the support main body can be alternately woven through the single silk threads to form an integrated structure, and the adjacent support sections are interlocked, so that the supporting force of the support main body is continuously transmitted from one end of the medical support to the other end of the medical support, the interlocking structure between the support sections provides good supporting force, and the single silk threads are woven with good bending capability; the medical stent has unique mesh design, and can be matched with the spring ring with the anchoring device, so that the spring ring can be better anchored on the medical stent, and the effect of blocking the lesion blood vessel breach is achieved. In summary, the medical stent provided by the application has good supporting performance and flexibility, and can also be matched with a spring ring to seal the breach of a lesion blood vessel.
A medical stent system comprising at least one spring coil and a medical stent as claimed in any one of the preceding claims;
the spring ring is anchored at a mesh hole formed between two adjacent first bracket sections of the medical bracket in a surrounding manner.
According to the medical support system, the support main body can be alternately woven into an integrated structure through the single wires, and the adjacent support sections are interlocked, so that the supporting force of the support main body is continuously transmitted from one end of the medical support to the other end of the medical support, the interlocking structure between the support sections provides good supporting force, and the single wires are woven to have good bending capability; the medical stent has unique mesh design, and can be matched with the spring ring with the anchoring device, so that the spring ring can be better anchored on the medical stent, and the effect of blocking the lesion blood vessel breach is achieved. In summary, the medical stent provided by the application has good supporting performance and flexibility, and can also be matched with a spring ring to seal the breach of a lesion blood vessel.
Drawings
FIG. 1 is a schematic view of a part of a medical stent according to an embodiment of the present application;
FIG. 2 is a schematic view showing the distribution of meshes of a medical stent according to an embodiment of the present application;
FIG. 3 is a schematic illustration of an application of a medical stent according to an embodiment of the present application;
FIG. 4 is a schematic illustration of an embodiment of the application for use in combination with a medical brace and spring coil;
FIG. 5 is a schematic view of a medical stent according to an embodiment of the present application after being deployed;
FIG. 6 is an enlarged partial schematic view of FIG. 3;
FIG. 7 is a schematic illustration of a braiding process for a medical stent comprising 4 first stent segments according to an embodiment of the present application;
FIG. 8 is an enlarged partial schematic view of FIG. 2 at A;
FIG. 9 is an enlarged view of a portion of a medical stent according to an embodiment of the present application;
FIG. 10 is a schematic view of a partial method of providing a medical stent according to another embodiment of the present application;
FIG. 11 is an enlarged partial schematic view of FIG. 10;
FIG. 12 is a schematic view showing the distribution of tie down provided by an embodiment of the present application;
FIG. 13 is a schematic view showing the distribution of tie down members according to another embodiment of the present application;
FIG. 14 is a schematic view showing the distribution of tie down members according to another embodiment of the present application;
FIG. 15 is a schematic view of a medical stent system according to another embodiment of the present application;
fig. 16 is an enlarged partial schematic view of a stent according to an embodiment of the present application.
Wherein, the reference numerals in the drawings are as follows:
10. a medical stent; 100. a holder main body; 100a, mesh openings; 110. a first bracket section; 110a, stent vertices; 110b, bracket ribs; 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 fixing part; 220. a reinforcing part; 300. a spring ring; 400. a second bracket section; A. an aorta; a1, a vacuum cavity; a2, a false cavity; a3, cracking.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.
As shown in fig. 1 to 14, an embodiment of the present application provides a medical stent 10, the medical stent 10 including a stent body 100; the stent body 100 is woven by single wires alternately and includes a plurality of first stent sections 110 along its length direction, the first stent sections 110 having a plurality of stent vertices 110a and a plurality of stent ribs 110b, wherein the stent vertices 110a of two adjacent first stent sections 110 are interlocked, i.e., two stent ribs 110b corresponding to the stent vertices 110a of two adjacent first stent sections are interpenetrating.
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 into a vacuum cavity A1 of a descending aorta a to expand the vacuum cavity A1 so as to achieve the purpose of remodelling blood vessels of the vacuum cavity A1.
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 two adjacent rows of alignment pins to form the first bracket segment 110 or a portion of the first bracket segment 110 b. Referring to fig. 15, in any of the rows of locating pins except the first and last rows, when the wire reaches a locating pin at one of the V-shaped vertices, the wire first passes over one side of the V-shape (e.g., the wire passes from one side of the side away from the clamp, i.e., the wire presses against one side of the V-shape), and then passes over the other side of the V-shape (e.g., the wire passes from the side of the other side closer to the clamp, i.e., the other side of the V-shape presses against the first wire), thereby interlocking the wires at the locating pin, thereby effecting interlocking of the stent vertices 110a of the adjacent two first stent segments 110.
Specifically, as shown in fig. 5 and 6, a single wire of a single wire is bent in a V-shape to weave one of the first stent sections 110, then moved toward the proximal or distal end of the medical stent and bent in a V-shape to weave one of the second first stent sections 110 until one of the nth first stent sections 110 is woven, after which the weaving of the remaining portion of the nth first stent section 110 is continued and moved toward the distal or proximal end of the medical stent until the other remaining portion of the first stent section 110 is woven; wherein N is a positive integer greater than 1.
The following describes the braiding process of the stent body 100 by taking the example that N is equal to 4 and braiding starts from the proximal end of the stent body 100:
as shown in fig. 7, when knitting a first stent section 111, one wire head of the wire is fixed and the other wire head is moved in a clockwise direction (or counterclockwise direction) until a wave-like structure is knitted that contains a predetermined number of stent ribs. The other wire end of the wire is then moved toward the distal end of the stent body 100 to begin braiding a second first stent section 112. While knitting the second first stent section 112, the other wire ends of the wire are moved in a clockwise direction (or counter-clockwise direction) until a corrugated structure is knitted that contains a predetermined number of stent ribs, wherein during the knitting process, the peak peaks of the trough of the second first stent section 112 are bypassed the peak peaks of the first stent section 111 to interlock the corresponding peak peaks. The third and fourth first stent sections 113, 114 are then woven in accordance with the steps described above.
After the fourth first stent section 114 is woven into a closed loop configuration, the other wire ends of the wire are moved toward the proximal end of the stent body 100 to continue to weave the third first stent section 113. When knitting the third first stent section 113, the other wire ends of the wire are moved in a counter-clockwise direction (or clockwise direction) until a closed loop is knitted, wherein during the knitting process, the peak trough peaks of the third first stent section 113 are bypassed the peak peaks of the second first stent section 112 to interlock the corresponding peak trough peaks. The braiding is then continued for the second first stent section 112, the first stent section 111, as per the steps described above. After the first stent section 111 is woven into a closed loop structure, the two spinnerets of the wire are welded using a metal tube. Note that, the ellipses in fig. 7 represent the stent ribs 110b and stent vertices 110a not shown in each of the first stent segments 110; in addition, stent apices 110a throughout include trough apices and crest apices. In addition, arrows other than those used to indicate reference numerals in fig. 7 are used to indicate the wire head orientation of the wire.
As one example, the stent body 100 may be woven from wire. The metal wire may be made of nickel-titanium alloy, cobalt-nickel alloy, stainless steel or other biocompatible metal materials. After the bracket body 100 is finished being woven, the two wire heads of the wire may be connected by welding or the like, and the two wire heads of the wire may also be welded by a metal pipe, so that the connection strength of the two wire heads may be ensured. Wherein, the material of the metal tube can be the same as or different from the material of the metal wire.
The medical stent 10 as described above can be applied to the field of treatment of a aortic dissection aneurysm. Wherein, the stent main body 100 can be alternately woven into an integrated structure through single wires, 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 wires are woven with good bending capability; as shown in FIG. 4, the medical stent 10 has a unique mesh design and can be used with the spring ring 300, so that the spring ring 300 can be better anchored on the medical stent 10 to achieve the effect of blocking the lesion vessel breach A3.
In summary, the medical stent 10 provided in this embodiment has better supporting performance and flexibility, and can also be matched with the spring ring 300 to seal the breach A3 of the diseased vessel.
As shown in fig. 5, in some embodiments of the present application, the medical stent 10 further comprises at least one second stent segment 400, the second stent segment 400 being disposed at the distal and/or proximal end of the stent body 100, the stent apex of the second stent segment 400 being interlocked with the stent apex 110a of the first stent segment 110 at the distal and/or proximal end of the stent body 100, i.e., the stent apex of the second stent segment 400 being interlocked with the stent apex 110a of the first stent segment 110 at the distal or proximal end of the stent body, or the stent apex of the second stent segment 400 being interlocked with the stent apex 110a of the first stent segment 110 at the distal and proximal ends of the stent body 100 when the second stent segment 400 is disposed at both the distal and proximal ends of the stent body 100. By the provision of the second stent section 400, the anchoring strength of the distal and/or proximal ends of the medical stent 10 may be increased.
During processing, the second stent segment 400 may be prepared first, and then the stent apices 110a of the first stent segment 110 at the distal and/or proximal ends may be interlocked with the stent apices of the second stent segment 400 while the stent body 100 is being woven. Wherein the stent apices of the second stent section 400 and the stent apices 110a of the first stent section 110 may be interlocked in the same manner as the stent apices 110a of the adjacent two first stent sections 110.
Optionally, the distal end of the stent body 100 is provided with a plurality of second stent sections 400 or a section of second stent sections 400, or the proximal end of the stent body 100 is provided with a plurality of second stent sections 400 or a section of second stent sections 400. Optionally, the distal end and the proximal end of the stent body 100 are each provided with a multi-segment second stent segment 400 or a segment second stent segment 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 and proximal ends 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 ribs of the second stent section 400 is greater than the height of the stent ribs 110b of the first stent section 110, thus facilitating delivery of the medical stent 10 by the delivery device.
Optionally, the second bracket section 400 is an elevated bracket section. The heightened stent segment means that the stent ribs of the stent segments are different in length in the axial direction of the medical stent, such that the stent peaks at the peaks or the stent peaks at the troughs of the second stent segment 400 are not located in the same circumferential direction of the second stent segment 400. Illustratively, adjacent stent apices at the peak of the second stent section 400 are circumferentially staggered, while two stent apices spaced one stent apex apart are circumferentially aligned. By providing the second stent section 400 as a heightened stent section, radial support forces are reduced, preventing distal breach recurrence.
In particular, in some embodiments of the present application, the stent body 100 has a diameter of 13mm to 22mm (e.g., 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, etc.), and the first stent section 110 has a number of stent ribs of 8 to 12 (e.g., 8, 9, 10, 11, 12, etc.). Alternatively, the stent 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.). By setting the diameter of the stent body 100 and the number of the stent ribs 110b, the medical stent 10 can be ensured to have better flexibility and strength, and the stent peak 110a can be prevented from being pestled out of the medical stent 10.
Further, in some embodiments of the applicationThe area of the mesh 100a formed between two adjacent first bracket sections 110 is 20mm 2 ～40mm 2 (e.g. 20mm 2 、25mm 2 、30mm 2 、35mm 2 、40mm 2 Etc.), the diameter of the standoff rib 110b is 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 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 contained.
As shown in fig. 2 and 8, the area of the mesh 100 a= (1/2) ×the distance L between the stent vertices 110a 1 Distance L between two adjacent bracket ribs 110b in the horizontal direction 2 . That is, the distance L between stent apices 110a 1 Having a certain proportional relation with the number of the holder ribs 110b, for example, the holder body 100 has a diameter of 16mm and the area of the mesh 100a is 30mm 2 Distance L between stent apices 110a of 10-sided stent 1 =30/(16×3.14/10) ×2=12 mm, that is, the height of the holder rib 110b is 6mm.
In particular, in some embodiments of the application, the stent apices 110a have 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 peak 110a in this way, adverse effects on the blood vessel caused by the stent peak 110a being too sharp can be avoided. In braiding the medical stent 10, a positioning needle may be used, wherein the positioning needle is installed to form the stent peak 110a, so that the diameter of the positioning needle may be the same as the curved diameter of the stent peak 110a.
In some embodiments of the present application, as shown in fig. 9-14, the medical stent further comprises a tie down 200, the tie down 200 being used to connect corresponding two interlocked stent apices 110a to define a displacement amplitude corresponding to the first stent segment 110. The tie down 200 can reduce the degree of freedom of the stent apex 110a, define the displacement amplitude corresponding to the first stent segment 110, and thus can prevent the corresponding portion of the stent body 100 from shrinking due to stacking. Therefore, the medical support provided by the embodiment can also effectively prevent the medical support from shrinking on the premise of ensuring good flexibility.
As an example, the tie down 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 in the proximal and distal ends of the stent body 100, or disposed in the proximal and middle of the stent body 100, or disposed in the distal and middle of the stent body 100, or disposed in the proximal, middle and distal ends of the stent body 100. The proximal end of the stent body 100 refers to an end of the stent body 100 near the heart, the distal end of the stent body 100 refers to an end of the stent body 100 away from the heart, and the middle of the stent body 100 refers to a portion between the proximal end and the distal end of the stent body 100. As an example, tie down 200 may be secured to the peak apex 100c of the most distal or proximal first stent segment 110 and the stent apex of the second stent segment 400, and tie down 200 may also be secured to the peak apex 100c of the most distal or proximal 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 application, the tie down 200 includes at least one fixing portion 210, and the fixing portion 210 connects the corresponding two interlocked stent apices 110a by knotting. The fixing portion 210 of the tie down 200 is fixed to the two interlocked stent apices 110a by means of knotting, thereby facilitating the processing of the medical stent 10. Of course, in other embodiments, the tie down 200 may be a bonding pad, and the two interlocked stent vertices 110a are fixed by welding.
Alternatively, the fixing portion 210 may be made of biocompatible materials such as polymer (e.g. PET, ePTFE), metal (e.g. nickel-titanium alloy, cobalt-nickel alloy, stainless), etc.
Alternatively, two stent apices 110a corresponding to two adjacent first stent sections 110 may be knotted to form the anchoring portion 210, or the locations where stent ribs 110b at the beginning and ending ends of the stent sections intersect may be knotted to form the anchoring portion 210. It is also possible to knot the corresponding two stent apices 110a on the adjacent two first stent sections 110 to form the anchoring portion 210, and to knot the locations where the stent ribs 110b at the beginning and ending ends of the stent sections intersect to form the anchoring portion 210.
Optionally, the number of fixtures 210 on each first carrier section 110 is 0.25 to 1 times, e.g., 0.25 times, 0.5 times, 0.75 times, 1 times the number of carrier ribs of the first carrier section 110. The number of the fixing portions 210 on each first carrier section 110 is thus set, and the displacement amplitude of the first carrier section 110 can be effectively limited.
Further, in some embodiments of the present application, as shown in fig. 10, the number of the fixing portions 210 is plural and divided into a plurality of groups, and each group of fixing portions 210 is located at both ends of the same bracket rib 110 b; the binding 200 further includes at least one reinforcing portion 220, where 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 support rib 110b where the two fixing portions 210 of the same group are located. The tie-down 200 with this structure makes the stent peak 110a not easy to be staggered, so as to avoid the knotting failure of the fixing portion 210.
Alternatively, the reinforcement portion 220 may be made of biocompatible materials such as polymers (e.g. PET, ePTFE), metals (e.g. nickel-titanium alloy, cobalt-nickel alloy, stainless), and the like, which may be the same as or different from the material of the fixing portion 210. Preferably, the two materials are the same, so that the fixing portion 210 and the reinforcing portion 220 can be formed by winding one wire around the support rib 110b and the support peak 110a, which is beneficial to the production and processing of the medical support 10 and can be fast bound.
Regarding the way the tie-down 200 is distributed, the present application gives two examples:
first kind: as shown in fig. 12 and 13, the stent body 100 is provided with at least one set of tie down members 200 along its own axial direction, and each set of tie down members 200 is distributed along the circumferential direction of the stent body 100. The distribution of the binding pieces 200 can ensure that the medical stent 10 has certain strength and flexibility.
Specifically, the number of the tie down members 200 positioned 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 the tie down members 200 positioned 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 the tie down members 200 positioned 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 tie downs 200 at the proximal, distal, and middle portions of the stent body 100 is greater than or equal to 1 (e.g., 1 set, 2 sets, 3 sets, or 4 sets, etc.). In other embodiments, the tie down 200 is located at two of the proximal, distal, and middle portions of the stent body, and the number of sets of tie down 200 is greater than or equal to 1 (e.g., 1 set, 2 set, 3 set, 4 set, etc.). The number of the binding pieces 200 is set so that the strength of the medical stent 10 can be ensured, and the medical stent 10 is ensured to have certain flexibility, because the binding pieces 200 are arranged on the medical stent 10, the displacement of the medical stent is reduced, the supporting force of the medical stent can be improved, and the binding pieces 200 are arranged at least one position among the proximal end, the distal end and the middle part of the medical stent 10, and are not arranged on all stent sections of the medical stent 10, so that the flexibility of the medical stent is ensured.
Alternatively, the number of tie downs 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. The number of tie downs 200 per first bracket section 110 is thus set to effectively limit the displacement amplitude of the first bracket section 110.
Alternatively, the tie down 200 is a W-shaped structure distributed along the axial direction of the stent body 100, a straight-shaped structure shown in fig. 12, or a zigzag-shaped structure shown in fig. 13. Preferably, the tie down 200 has a zigzag structure distributed along the axial direction of the stent body 100, and the tie down 200 of this structure is not only of a small material but also can effectively limit the displacement amplitude of the first stent section 110.
Second kind: as shown in fig. 14, a plurality of tie down members 200 are provided on the stent body 100, and the tie down members 200 penetrate the stent body 100 in a direction from the proximal end to the distal end of the stent body 100. Such a distribution of tie down 200 may increase the strength of medical stent 10 compared to the first example.
Alternatively, as shown in fig. 14, the number of tie downs 200 is 2 and 2 tie downs 200 intersect. The distribution of the tie-down 200 ensures the flexibility of the medical stent 10.
Another embodiment of the present application 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 of the above; the spring ring 300 is anchored at the mesh 100a defined between adjacent two first stent sections 110 of the medical stent 10.
Among them, the number of the spring coils 300 is mainly related to the number of the blood vessel breach A3.
The medical stent 10 as described above can be applied to the field of treatment of a aortic dissection aneurysm. Wherein, the stent main body 100 can be alternately woven into an integrated structure through single wires, 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 wires are woven with good bending capability; as shown in FIG. 4, the medical stent 10 has a unique mesh design and can be used with the spring ring 300, so that the spring ring 300 can be better anchored on the medical stent 10 to achieve the effect of blocking the lesion vessel breach A3.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (15)
1. The medical stent is characterized by comprising a stent main body (100), wherein the stent main body (100) is woven by single silk wires alternately 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 (110 a) and a plurality of stent ribs (110 b), and the stent vertexes (110 a) of two adjacent first stent sections (110) are interlocked.
2. The medical stent according to claim 1, wherein the medical stent (10) further comprises at least one second stent segment (400), the second stent segment (400) being arranged at the distal and/or proximal end of the stent body (100), the stent apex of the second stent segment (400) interlocking with the stent apex (110 a) of the first stent segment (110) at the distal and/or proximal end of the stent body (100).
3. The medical stent according to claim 2, wherein the second stent section (400) is an elevated stent section.
4. A medical stent according to any one of claims 1-3, further comprising a tie down (200), the tie down (200) being adapted to connect the stent apices (110 a) corresponding to two interlocks to define a displacement amplitude corresponding to the first stent segment (110).
5. The medical stent according to claim 4, wherein the tie down (200) comprises at least one fixation portion (210), the fixation portion (210) connecting the corresponding two interlocked stent apices (110 a) by means of a knot.
6. The medical stent according to claim 5, wherein the number of the fixing portions (210) is plural and divided into a plurality of 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 fixing parts (210) corresponding to the same group, and the reinforcing part (220) is further wound on the bracket edges (110 b) where the two fixing parts (210) are located.
7. The medical stent according to claim 6, wherein the stent body (100) is provided with at least one set of the tie-downs (200) in its own axial direction, each set of the tie-downs (200) being distributed along the circumference of the stent body (100).
8. The medical stent according to claim 7, wherein the tie down members (200) are zigzag structures distributed along the axial direction of the stent body (100).
9. The medical stent according to claim 6, wherein a plurality of the tie down members (200) are provided on the stent body (100), the tie down members (200) intersecting the stent body (100) in a proximal-to-distal direction of the stent body (100).
10. The medical stent according to claim 9, wherein the number of tie down members (200) is 2 and 2 tie down members (200) intersect.
11. A medical stent according to any of claims 1-3, wherein a wire end of the single wire is bent in a V-shape to braid a portion of a first stent segment (110), then moved towards the proximal or distal end of the medical stent and bent in a V-shape to braid a portion of a second first stent segment (110) until a portion of an nth first stent segment (110) is braided, after which the braiding of the remaining portion of the nth first stent segment (110) is continued and moved towards the distal or proximal end of the medical stent until the remaining portion of the other first stent segments (110) is braided;
wherein N is a positive integer greater than 1.
12. A medical stent according to any one of claims 1-3, wherein the stent body (100) has a diameter of 13 mm-22 mm and the number of stent ribs of the first stent section (110) is 8-12;
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. A medical stent according to claim 12, wherein the area of the mesh (100 a) enclosed between two adjacent first stent sections (110) is 20mm 2 ～40mm 2 The diameter of the bracket rib (110 b) is 0.01 inch to 0.016 inch.
14. A medical stent according to any one of claims 1-3, wherein the stent apices (110 a) have a curved diameter of 1.2mm to 3mm.
15. A medical stent system, characterized in that it comprises at least one spring coil (300) and a medical stent (10) according to any one of claims 1-14;
the spring ring (300) is anchored at a mesh (100 a) defined between two adjacent first stent sections (110) of the medical stent (10).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310425561.5A CN116492121A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
| CN202210163879.6A CN116616970A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
| PCT/CN2023/077291 WO2023160510A1 (en) | 2022-02-22 | 2023-02-21 | Medical stent and medical stent system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210163879.6A CN116616970A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310425561.5A Division CN116492121A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116616970A true CN116616970A (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210163879.6A Pending CN116616970A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
| CN202310425561.5A Pending CN116492121A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310425561.5A Pending CN116492121A (en) | 2022-02-22 | 2022-02-22 | Medical support and medical support system |
Country Status (2)
| Country | Link |
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| CN (2) | CN116616970A (en) |
| WO (1) | WO2023160510A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6187036B1 (en) * | 1998-12-11 | 2001-02-13 | Endologix, Inc. | Endoluminal vascular prosthesis |
| KR100561713B1 (en) * | 2003-05-23 | 2006-03-20 | (주) 태웅메디칼 | Flexible self-expandable stent and methods for making the stent |
| WO2020054027A1 (en) * | 2018-09-13 | 2020-03-19 | オリンパス株式会社 | Stent |
| EP3653171A1 (en) * | 2018-11-16 | 2020-05-20 | Sofradim Production | Implants suitable for soft tissue repair |
| CN113017746A (en) * | 2019-12-24 | 2021-06-25 | 上海微创心脉医疗科技(集团)股份有限公司 | Interlayer crevasse plugging system |
| CN113893062B (en) * | 2020-07-06 | 2023-01-03 | 先健科技(深圳)有限公司 | Covered stent |
| CN217286202U (en) * | 2022-02-22 | 2022-08-26 | 上海微创心脉医疗科技(集团)股份有限公司 | Medical stent and medical stent system |
-
2022
- 2022-02-22 CN CN202210163879.6A patent/CN116616970A/en active Pending
- 2022-02-22 CN CN202310425561.5A patent/CN116492121A/en active Pending
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2023
- 2023-02-21 WO PCT/CN2023/077291 patent/WO2023160510A1/en unknown
Also Published As
| Publication number | Publication date |
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| CN116492121A (en) | 2023-07-28 |
| WO2023160510A1 (en) | 2023-08-31 |
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