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WO1998007385A1 - Extenseur endovasculaire et ballon d'application - Google Patents

Extenseur endovasculaire et ballon d'application Download PDF

Info

Publication number
WO1998007385A1
WO1998007385A1 PCT/EP1997/004584 EP9704584W WO9807385A1 WO 1998007385 A1 WO1998007385 A1 WO 1998007385A1 EP 9704584 W EP9704584 W EP 9704584W WO 9807385 A1 WO9807385 A1 WO 9807385A1
Authority
WO
WIPO (PCT)
Prior art keywords
stent
balloon
segment
wire
segments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1997/004584
Other languages
German (de)
English (en)
Inventor
Thomas Ischinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1998007385A1 publication Critical patent/WO1998007385A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
    • 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
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/958—Inflatable balloons for placing stents or stent-grafts

Definitions

  • Vascular supports or "stents" made of metal or polymers are known means
  • Stents are inserted into the ge using balloon catheters or other application systems
  • the barrel lumen is pushed forward in the folded state and then stretched or unfolded by expansion by means of a dilatation element (eg balloon catheter) or by self-expansion (in the case of spring-elastic stent material) to reach it. res functional state as a support element.
  • a dilatation element eg balloon catheter
  • self-expansion in the case of spring-elastic stent material
  • the stents should be sufficiently stable (resistant to collapse) to continuously support the vessel wall and keep the lumen open, both for advancing
  • Stents are very flexible, that is, in particular, they must be flexible relative to the longitudinal direction. Otherwise there will be acute injuries to the vessel wall when advancing through vascular curves or, in the long term, through the movement of the beating heart.
  • the goal of stent development is to avoid sharp edges, inhomogeneous unfolding during expansion and inadequate adherence to the application system or the balloon.
  • the stent's ability to enlarge the diameter should be sufficiently large so that both small (approx. 2 mm vessel diameter) and large ones Vessels (> 5mm)
  • the balloon is pushed in or pulled out of the balloon, for example by snagging individual stent elements in a restless surface on one Place the inner wall of the vessel.
  • Such a stent loss generally results from the combination of two defects.
  • the segments of the balloonb that are not stent-bearing, ie outside the stent and without touching it can be
  • an application balloon which creates a "bed” or a cylindrical constriction of slightly reduced diameter for the stents to be applied, ie an area defined by a proximal and a distal one, in the area of its essentially cylindrical working surface in the initial state Step in the outer surface of the ball
  • the length of the bed corresponds approximately to the length of the stent, ie it is somewhat longer than the stent, for example 16 mm for a stent which is 15 mm long when folded.
  • the free ends of the balloon, ie outside the bed and this creating, are designed so that, for example, due to a higher
  • balloon for stents which significantly shorten during expansion, there are some material increases on both sides of the bed starting from the steps over the stent bed
  • Drical stents in the plane of the drawing The corresponding cylinder with, for example, four segments I to IV is denoted by Z in FIG.
  • a cylindrical wire structure that forms a stent is in a flat dar
  • the starting material for the stent production is either a wire or a
  • running wire e.g. made of metal
  • running wire alternating multiple smusoid or zig-zag
  • the first sequence of waves Lungs are bent circumferentially (circularly) (eg around an imaginary cylinder Z) and firmly connected to the start of the wire (soldering, welding). Then the wire runs straight (at LA) or only sinusoidally bent once or twice in the direction of the longitudinal axis L on a jacket line of the cylinder or in slight deviation (45 ° or less, oblique, straight or
  • the short slow-running (and possibly once or twice also
  • wire segment LA should be thinner and thus fle ⁇
  • zigzag-shaped corrugation W are immediately adjacent in the unexpanded state and preferably not at any other point (or at most egg
  • the amplitude of the zigzag / sinusoidal corrugations is preferred
  • W in the non-expanded initial state of the stent is less than 2 5 mm for coronary vessels and less than 4 mm for pe ⁇ phere vessels with a diameter of 6 mm
  • St of this consists of individual cylindrical to elongated segments I to IV (or more) which are spaced apart from one another in the longitudinal direction but are connected to one another in the longitudinal direction and which consist of a continuous
  • the wire D in the individual segment speaks an undulated ring that
  • the number of zigzag bends or corrugations W on the 360 ° circumference of a segment depends on the wire cross section (flat, oval, round), on the thickness of the wire, the thickness (or diameter) of the wire, the
  • At least one of the annular to cylindrical segments I to IV of the stent according to the invention at least one of the annular to cylindrical segments I to IV of the
  • Stents may be arranged obliquely to the longitudinal axis L of the stent; this can ins ⁇
  • the individual segments can (additionally or alternatively) be connected to one another in the longitudinal direction by (one or) several longitudinal connectors (backbone BB), which can be distributed asymmetrically on the circumference of the stent.
  • backbone BB longitudinal connectors
  • a special structure material e.g. doubling or multiplying the balloon material or the material thickness, or applying additional balloon material or similar material such as
  • the stent retracts by shortening under the tongues and can be applied unhindered by these.
  • the tongues can be made so resistant that they tear themselves when the balloon begins to fill
  • the step defining the balloon bed is designed so that it is not firmly fixed
  • stent length can be adjusted. This can be done by means of a sleeve that can be pushed or screwed onto the proximal end of the stent balloon, for example a flexible, closed or spirally perforated (in the sense of a thread) plastic tube that extends, for example, over the distal end of the balloon
  • a spiral would also come from e.g. Round or flat wire into consideration
  • any spiral thread is beneficial for maintaining the position of the element during balloon dilation or stent application.
  • the described system for varying the length of the stent bed is also suitable for shortening balloons when dilating short stenoses or stents, particularly, but not only, when high pressure is used
  • the glue point is between stent and folded tetem balloon attached that by unfolding the balloon at the beginning
  • the total length is essentially preserved during expansion, not quite the distance between the circular elements or segments.
  • Protection i.e. Securing the stent against loss when withdrawing from the vascular system

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne un extenseur en fil métallique (D) constitué d'un matériau rond ou plat. L'extenseur (St) se présente, lorsqu'il n'est pas en extension, sous forme de segments (I, II, III, IV) essentiellement cylindriques, placés à distance les des autres dans le sens longitudinal. Le fil métallique (D) est guidé sur la gaine (M) de chaque segment cylindrique dans le sens périphérique sur 360 DEG autour de l'axe longitudinal (L) du segment et transversalement à la direction périphérique (U), en zigzag voire sous forme sinusoïdale de façon à occuper pratiquement la largeur (B) du segment dans le sens longitudinal. Lors de l'application de l'extenseur, ce dernier s'élargit pour atteindre un diamètre qui permet aux ondulations sinusoïdales ou en zigzag de chaque segment d'être pratiquement entièrement étirées (angle alpha = 100-180 DEG ).
PCT/EP1997/004584 1996-08-22 1997-08-22 Extenseur endovasculaire et ballon d'application Ceased WO1998007385A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19634005.5 1996-08-22
DE19634005 1996-08-22

Publications (1)

Publication Number Publication Date
WO1998007385A1 true WO1998007385A1 (fr) 1998-02-26

Family

ID=7803440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004584 Ceased WO1998007385A1 (fr) 1996-08-22 1997-08-22 Extenseur endovasculaire et ballon d'application

Country Status (1)

Country Link
WO (1) WO1998007385A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900551A1 (fr) * 1997-09-03 1999-03-10 FOGAZZI DI VENTURELLI ANDREA & C. S.n.c. Structure d'un stent expansible radialement
WO2003086237A1 (fr) * 2002-04-10 2003-10-23 Scimed Life Systems, Inc. Stent hybride
US6899728B1 (en) 1998-01-26 2005-05-31 Bridport (Uk) Limited Reinforced graft
WO2007080611A1 (fr) * 2006-01-13 2007-07-19 I.B.S. International Biomedical Systems S.P.A. Prothèse endovasculaire et processus de fabrication associé
US7520890B2 (en) 1998-01-26 2009-04-21 Phillips Peter W Reinforced graft and method of deployment
JP2020039504A (ja) * 2018-09-07 2020-03-19 株式会社東海メディカルプロダクツ ステント

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856516A (en) * 1989-01-09 1989-08-15 Cordis Corporation Endovascular stent apparatus and method
US5133732A (en) * 1987-10-19 1992-07-28 Medtronic, Inc. Intravascular stent
US5135536A (en) * 1991-02-05 1992-08-04 Cordis Corporation Endovascular stent and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133732A (en) * 1987-10-19 1992-07-28 Medtronic, Inc. Intravascular stent
US4856516A (en) * 1989-01-09 1989-08-15 Cordis Corporation Endovascular stent apparatus and method
US5135536A (en) * 1991-02-05 1992-08-04 Cordis Corporation Endovascular stent and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900551A1 (fr) * 1997-09-03 1999-03-10 FOGAZZI DI VENTURELLI ANDREA & C. S.n.c. Structure d'un stent expansible radialement
US6899728B1 (en) 1998-01-26 2005-05-31 Bridport (Uk) Limited Reinforced graft
US7520890B2 (en) 1998-01-26 2009-04-21 Phillips Peter W Reinforced graft and method of deployment
WO2003086237A1 (fr) * 2002-04-10 2003-10-23 Scimed Life Systems, Inc. Stent hybride
WO2007080611A1 (fr) * 2006-01-13 2007-07-19 I.B.S. International Biomedical Systems S.P.A. Prothèse endovasculaire et processus de fabrication associé
JP2009523050A (ja) * 2006-01-13 2009-06-18 アイ．ビー．エス．インターナショナル バイオメディカル システムズ ソシエタ ペル アチオニ 血管内人工装具及び関連する製造方法
EA013625B1 (ru) * 2006-01-13 2010-06-30 И.Б.С. Интернэшнл Байомедикал Системз С.П.А. Эндоваскулярный протез и способ его изготовления
JP2020039504A (ja) * 2018-09-07 2020-03-19 株式会社東海メディカルプロダクツ ステント

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