WO2001087401A1 - Stent medical de type tube - Google Patents
Stent medical de type tube Download PDFInfo
- Publication number
- WO2001087401A1 WO2001087401A1 PCT/JP2001/003904 JP0103904W WO0187401A1 WO 2001087401 A1 WO2001087401 A1 WO 2001087401A1 JP 0103904 W JP0103904 W JP 0103904W WO 0187401 A1 WO0187401 A1 WO 0187401A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- medical
- stent
- metal
- net
- star
- Prior art date
Links
Classifications
-
- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
-
- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
-
- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
- A61F2002/91541—Adjacent bands are arranged out of phase
-
- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/9155—Adjacent bands being connected to each other
Definitions
- the present invention relates to a medical tubular stent, and more particularly to a medical tubular stent having a net ring structure of a metal thread.
- a medical tubular stent has a ring-shaped structure processed into a net shape with a metal coil or a metal thread.
- the diameter of a coil or net-shaped annular stent can be changed from a contracted state to an expanded state. It is inserted into the lumen of the lesion (hereinafter referred to as the lumen) inside the human body, for example, in a tubular organ such as the bronchus, canteen, 0 mm, coronary artery or other blood vessel, and then expanded. You. As a result, the lumen is expanded and the lumen is improved, achieving the therapeutic goal.
- the support force is large in the diametrical direction, the diametrical expansion is difficult to dent during expansion, the irritation to the noremen wall is small during expansion, and it is not shortened in the axial direction.
- an object of the present invention is to provide a medical tubular stent having a larger diametrical support force, good stability, and less local dents.
- Another object of the present invention is that when the stent is used in a curved state, the inner and outer surfaces are flat, and during expansion, the moving force on the wall of the sleeve is small, and the axial length before and after expansion is basically changed. There is no need to provide a medical tubular stent.
- the medical tubular stent of the present invention is a medical stent formed in a tube shape by a metal thread net, wherein the metal thread net is formed by connecting a plurality of B cells interconnected in a circumferential direction in an axial direction. A net unit, and a plurality of these units are arranged in the axial direction. Between these axial net units, each of the 3-star cells constituting the adjacent axial net unit is connected in the axial direction. It is characterized by being connected to each other.
- the star cell is a symmetrical, vertically asymmetrical pentagonal star cell composed of an upper protrusion, a left-right horizontal protrusion, and a left-right lower protrusion.
- the multiple star cells included are arranged so that the vertical direction is the same, and the multiple star cells included in adjacent axial net units have alternate vertical directions. It is characterized by being arranged as follows.
- each projection of the knitted 3-cell is U-shaped or V-shaped formed by a smooth curve.
- the medical tubular stent of the present invention is a medical stent formed in a tubular shape by a thread net, wherein the s thread net is extended in a circumferential direction of the tube, and is arranged in parallel in an axial direction.
- a plurality of substantially sinusoidal metal yarns, and among these yarns, adjacent sine yarns are connected to each other at a neutral point of each wavelength of the sine wave so as to be connected to each other.
- a plurality of unimodal curved metal yarns arranged in the circumferential direction. In these unimodal curved metal yarns, the peak directions of the axially adjacent unimodal curved metal yarns are opposite to each other. It is characterized by being arranged to face.
- the plurality of substantially sinusoidal metal threads arranged in parallel in the if3 axis direction have the eigenphase of the sine wave constituting the adjacent sine metal threads, It is characterized in that they are arranged so as to be substantially the same in the circumferential direction.
- ⁇ The medical stent formed in a tube shape by the metal thread net has a wavelength of the sinusoidal metal thread in a state where the diameter of the medical stent is enlarged. It is characterized in that it has been expanded compared to the state before the enlargement, and its amplitude has been reduced compared to the state before the enlargement of the knitting diameter.
- the neutral point of the self-sinusoidal metal thread is substantially the same in the axial direction of the il3 tubular stent before and after the diameter of the tubular stent is expanded. It is characterized by being held in the same position.
- FIG. 1 is an exploded plan view showing a structure of a metal tube net constituting a medical tubular stent of the present invention when it is not expanded.
- FIG. 2 is an exploded plan view showing the structure of the medical tube-shaped stent of the present invention when the thread net is expanded.
- FIG. 3 is an enlarged plan view showing one of these star cells shown in FIG.
- FIG. 4 is a side view of the tubular stent formed of the unexpanded metal thread net shown in FIG. DETAILED DESCRIPTION OF THE INVENTION
- FIG. 1 is an exploded plan view showing a structure of a metal tubular net constituting a medical tubular stent of the present invention when not expanded.
- FIG. 2 is an exploded plan view showing a structure when the metal thread net constituting the medical tubular stent of the present invention is expanded.
- the lateral direction corresponds to the axial direction of the tubular stent
- the longitudinal direction corresponds to the circumferential direction.
- the metal thread net constituting the medical tubular stent of the present invention has four star-shaped cells 11, 1, 2, 13, and 13 having the same shape in the circumferential direction. 14 constitutes one unit 15 in the axial direction. One unit 15 in this axial direction is arranged in 7 units 15 to 21 in the axial direction.
- the star cells 11 to 14 are composed of upper projections 31, left and right horizontal projections 32, 33, and left and right lower projections 34, 35 as shown in FIG. 2. It is an almost pentagonal star cell that is asymmetrical vertically and horizontally.
- protrusions are formed by a smooth U-shaped or V-shaped curve ⁇
- the left and right lower protrusions 34, 35 extend horizontally in the left and right directions in the unexpanded state in Fig. 1, but in the expanded state in Fig. 2. In, each extends diagonally downward.
- the star-shaped cells 11 to 14 included in one unit 15 in the axial direction have their upward protrusions 31 all directed upward.
- the star cells 11 to 14 included in the adjacent axial unit 16 have their upper protrusions 31 all directed downward. So Then, the star cells 11 to 14 included in the third axial unit 17 are all directed upward, similarly to the first axial unit.
- the star cells in the fourth to seventh axial units are similarly arranged so that the vertical directions of adjacent axial units are reversed.
- the star cells 11 to 14 included in the first and second axial units 15 and 16 are connected to each other by connecting one of the horizontal projections 32 and 33 to each other. Has been done. Similarly, the star cells 11 to 14 included in the second and third axial units 16 and 17 are also formed by connecting one of the horizontal weirs 32 and 33 to each other. Interconnected. Similarly, the third to seventh axial units 17 to 21 are also interconnected.
- the metallic thread net constituting the medical tubular stent of the present invention thus constituted is characterized in that the metallic thread nets forming the contours on both sides of the B cells 11 to L4 are formed of lufB tubular stent. It has a substantially sinusoidal shape extending in the circumferential direction. Then, as shown in FIGS. 1 and 2, these sinusoidal metal yarns form the horizontal cells constituting the star cells 11 to 14 at the neutral point 36 at each wavelength forming the sinusoidal waves. The tops of the protrusions 32 and 33 are connected.
- the shape of this part is gentle to the left and right with the upper protrusion 31 as the vertex. It is a single-peak curve ⁇ ⁇ that extends horizontally with a ridge. Therefore, the above-mentioned sine »metal yarns are mutually connected by the unimodal curved metal yarn at the neutral point 36 of each wavelength forming the sine wave.
- Such features are the same for star cells 11 to 14 belonging to any of the axial units. That is, for example, in the first axial unit 15 and the second axial unit 16, the star cells 11 1 to 14 are in opposite directions, but belong to the second axial unit 16.
- FIG. 4 is a side view of a tubular stent formed from the metal thread net before expansion shown in FIG. In the figure, the same components as those shown in FIG. 1 or FIG. The components are denoted by the same reference numerals.
- the stent of this example has a length of 12 to 13 mm and the direct line is about 1 mm.
- this tubular stent is performed by mechanically or scientifically processing a flat metal plate or a ceramic plate to form a flat metal thread net, and then bending it into a tube shape, or forming a tube-shaped metal plate.
- the ceramic plate may be processed into a JS thread net by mechanical or mechanical processing.
- the number of star cells constituting the tubular stent is not limited to the above embodiment.
- the number of cells in the axial direction (the number of units in the axial direction) and the size are selected according to the lesion length.
- the number and size of cells in the circumferential direction are selected according to the size of the lesion lumen.
- the tubular stent configured as described above is inserted into a lesion lumen part in a human body attached to the tip of a force sensor (not shown) while the diameter of the tubular stent is not expanded. In this state, the diameter of the tubular stent is expanded.
- Various methods are known for expanding the diameter of the tube-shaped stent. For example, air is fed into a tubular balloon inserted into a tubular stent mounted on the tip of a catheter. ⁇ Peng can be made.
- the medical tubular stent of the present invention changes its direction alternately in the axial direction between sinusoidal metal yarns arranged at predetermined intervals in the axial direction.
- the stent With a structure in which the stents are interconnected by a single-peak curved metal thread, the stent can be easily bent in any direction in the axial direction when the stent is inserted into a bent lesion.
- the sinusoidal metal yarns arranged at predetermined intervals in the axial direction are interconnected by a unimodal curved metal yarn at the neutral point 36 of each wavelength forming the positive sine wave.
- the neutral point 36 does not move in the axial direction even if the tubular stent changes from the unexpanded state to the expanded state in the diametrical direction. No fluctuation occurs. Therefore, it does not irritate or damage the lumen wall. That is, in the medical tubular stent of the present invention, in the state where the diameter is expanded, the wavelength of the knitted ES sinusoidal thread is expanded as compared with the state before the expansion of the diameter of the squirrel3. , And its amplitude is The diameter has been reduced compared to the state before the enlargement. However, the neutral point 36 of the knitted SE chord-like ⁇ i thread is maintained at the same position in the axial direction of the tubular stent before and after the diameter of the tubular stent is increased. It is characterized by that.
- the metal thread net constituting the stent has a single-peak curve at a neutral point 36 at each wavelength forming a sine wave between a plurality of sine metal threads arranged at predetermined intervals in the axial direction. It has a structure in which it is connected to each other by metal-like threads, so the sabot force in the circumferential direction is large, the inner and outer surfaces are flat, and there are few local irregularities.
- the metal thread net constituting the medical tubular stent of the present invention is composed of a plurality of sinusoidal metal threads and a single-peak curved metal thread interconnecting these, the end of the tubular stent Is terminated by a closed metal thread loop and no cuts in the metal thread appear. Therefore, the stent can be inserted into the lesion lumen without any resistance, and there is no risk of damaging the inner wall of the lumen.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Optics & Photonics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001256691A AU2001256691A1 (en) | 2000-05-15 | 2001-05-10 | Medical tube-like stent |
US10/276,519 US20040167608A1 (en) | 2000-05-15 | 2001-05-10 | Medical tube-like stent |
EP01930032A EP1316328A1 (en) | 2000-05-15 | 2001-05-10 | Medical tube-like stent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN00233798.3U CN2430175Y (zh) | 2000-05-15 | 2000-05-15 | 医用管状支架 |
CN00233798.3 | 2000-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001087401A1 true WO2001087401A1 (fr) | 2001-11-22 |
Family
ID=4624419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/003904 WO2001087401A1 (fr) | 2000-05-15 | 2001-05-10 | Stent medical de type tube |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040167608A1 (ja) |
EP (1) | EP1316328A1 (ja) |
CN (1) | CN2430175Y (ja) |
AU (1) | AU2001256691A1 (ja) |
WO (1) | WO2001087401A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003053284A1 (en) * | 2001-12-20 | 2003-07-03 | White Geoffrey H | An intraluminal stent and graft |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT1575451E (pt) * | 2002-12-19 | 2010-08-11 | Invatec Spa | Prótese endoluminal |
US7323007B2 (en) * | 2003-06-02 | 2008-01-29 | Nipro Corporation | Soft stent with excellent follow-up capability to blood vessel |
CN1977777B (zh) * | 2005-12-08 | 2011-05-25 | 上海康德莱企业发展集团股份有限公司 | 管网式血管支架 |
US20110067471A1 (en) * | 2009-09-18 | 2011-03-24 | Medtronic Vascular, Inc. | Method and Apparatus for Creating Formed Elements Used to Make Wound Stents |
EP4173599A1 (en) * | 2012-05-14 | 2023-05-03 | C. R. Bard, Inc. | Uniformly expandable stent |
CN107137161B (zh) * | 2017-06-21 | 2018-02-13 | 张天华 | 一种含有芯片的主动脉夹层支架及该支架的监控系统 |
CN116370168B (zh) * | 2023-05-31 | 2023-08-04 | 昆明理工大学 | 基于多圆弧星形胞元结构的血管支架结构、泊松比调节方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998020927A1 (en) * | 1996-11-12 | 1998-05-22 | Valerian Voinov | The optimum expandable stent mechanical model and its application |
US5807404A (en) * | 1996-09-19 | 1998-09-15 | Medinol Ltd. | Stent with variable features to optimize support and method of making such stent |
JPH1170169A (ja) * | 1997-07-16 | 1999-03-16 | Jan Yan-Sou | 血管用ステント |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2043472A1 (en) * | 1990-06-04 | 1991-12-05 | Mitsutaka Miyabayashi | Electrode for secondary battery |
US5733303A (en) * | 1994-03-17 | 1998-03-31 | Medinol Ltd. | Flexible expandable stent |
US5836964A (en) * | 1996-10-30 | 1998-11-17 | Medinol Ltd. | Stent fabrication method |
US5776183A (en) * | 1996-08-23 | 1998-07-07 | Kanesaka; Nozomu | Expandable stent |
WO1998040035A1 (en) * | 1997-03-13 | 1998-09-17 | United States Surgical Corporation | Flexible tissue supporting device |
US6451049B2 (en) * | 1998-04-29 | 2002-09-17 | Sorin Biomedica Cardio, S.P.A. | Stents for angioplasty |
US6123721A (en) * | 1998-02-17 | 2000-09-26 | Jang; G. David | Tubular stent consists of chevron-shape expansion struts and ipsilaterally attached M-frame connectors |
US6261319B1 (en) * | 1998-07-08 | 2001-07-17 | Scimed Life Systems, Inc. | Stent |
-
2000
- 2000-05-15 CN CN00233798.3U patent/CN2430175Y/zh not_active Expired - Fee Related
-
2001
- 2001-05-10 US US10/276,519 patent/US20040167608A1/en not_active Abandoned
- 2001-05-10 AU AU2001256691A patent/AU2001256691A1/en not_active Abandoned
- 2001-05-10 EP EP01930032A patent/EP1316328A1/en not_active Withdrawn
- 2001-05-10 WO PCT/JP2001/003904 patent/WO2001087401A1/ja not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5807404A (en) * | 1996-09-19 | 1998-09-15 | Medinol Ltd. | Stent with variable features to optimize support and method of making such stent |
WO1998020927A1 (en) * | 1996-11-12 | 1998-05-22 | Valerian Voinov | The optimum expandable stent mechanical model and its application |
JPH1170169A (ja) * | 1997-07-16 | 1999-03-16 | Jan Yan-Sou | 血管用ステント |
Non-Patent Citations (1)
Title |
---|
See also references of EP1316328A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003053284A1 (en) * | 2001-12-20 | 2003-07-03 | White Geoffrey H | An intraluminal stent and graft |
Also Published As
Publication number | Publication date |
---|---|
CN2430175Y (zh) | 2001-05-16 |
US20040167608A1 (en) | 2004-08-26 |
EP1316328A4 (en) | 2003-06-04 |
EP1316328A1 (en) | 2003-06-04 |
AU2001256691A1 (en) | 2001-11-26 |
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