Abstract:
A scaffold graft used for treatment of treatment of arterial perforations and/or condition of aneurysm. The scaffold may be made of a biodegradable material. The scaffold is coated with a biodegradable layer of polymer on an outer surface. The biodegradable scaffold is made of poly- L-lactic acid (PLLA). The biodegradable graft may be made of poly-L-lactide-co-caprolactone (PLCL), polycaprolactone (PCL), poly-dl-lactic acid, (PDLLA), polyglycerol sebacate (PGS), Poly L- lactide (PLLA), Poly(glycolic acid) (PGA), Poly L-lactide co-glycolic acid (PLGA) or a mixture thereof. Additionally, the scaffold graft is coated with an antiproliferative drug formulation.
Abstract:
Methods of fabricating a stent are disclosed including forming a primer layer on a surface of the scaffold including a first polylactide polymer. The primer layer includes a second polylactide polymer and is free of a therapeutic agent. The scaffold with the primer layer is thermally treated to condition the scaffold. A therapeutic layer is formed over the primer layer and the therapeutic layer includes the second polylactide polymer and a drug. The scaffold is crimped and the primer layer improves adhesion of the therapeutic layer to the scaffold and reduces or prevents damage to the therapeutic layer during crimping.
Abstract:
A stent having a compressed delivery configuration, an expanded configuration for implantation in a body lumen, a central body portion having a first plurality of struts, and an end portion having a second plurality of struts, wherein the first plurality of struts defines a central body pattern having a first axial stiffness, and the second plurality of struts defines an open cell configuration having a second axial stiffness greater than the first axial stiffness, the second axial stiffness sufficient to resist more than about 5% radial expansion of the end portion from the delivery configuration so long as at least about 20% of a length of the first end portion is radially constrained in the delivery configuration.
Abstract:
Apparatus and methods are described including a stent (20) that includes a stent body (52) that includes a generally cylindrical distal section (56), and a generally cylindrical middle section (58). The middle section includes a plurality of middle-section strut rings (60) that are flexibly interconnected to one another, by a plurality of bridges (64), such as to facilitate curving of the middle section. The distal section includes at least one distal-section strut ring (66). The stent is configured such that, when the stent body is in a radially compressed configuration, distal-section strut ring exerts an outward radial force that is greater than an outward radial force exerted by each of the middle-section strut rings. A plurality of antenna posts (46) protrude longitudinally from the distal section, and an antenna (28) disposed annularly on the antenna posts. Other applications are also described.
Abstract:
A stent having a main body with a proximal end and a distal end section having proximal and distal openings used for treatment of lesions in blood vessels and hollow organs, particularly at the ostium of side branches. The stent adapts to the anatomical configuration of a vessel branch by having at least one oblique end section in at least its expanded state. Truncated versions of the oblique end section are described as well.
Abstract:
An embolization device for treating ischemic stroke is disclosed, having a surface, wherein the body portion is configured to have a radiopaque and electropositive surface under physiological conditions when the device is implanted into, which ionically binds a blood component in an amount effective to promote stability of device in situ to bind to a tissue component in an amount effective to increase adhesion of the device as compared to a device without an electropositive surface, and embolic coils being so delivered are electrolytically detachable in under 10 seconds.
Abstract:
본 발명은 와이어형 스텐트에 관한 것이다. 본 발명은 복수의 단위 와이어로 구성된 와이어형 스텐트를 제공하되, 복수의 단위 와이어가 연결되는 부위는 축방향을 따라 면 접촉을 하도록 구성함으로써, 와이어형 스텐트 특유의 유연성은 그대로 유지하면서 반경 방향으로의 강도가 증가되므로 리코일 및 쇼트닝 현상을 최소화할 수 있다. 또한, 본 발명에서는 스텐트를 구성하는 스트럿의 폭이 혈관 내벽을 향해 증가하도록 구성함으로써, 내피세포화가 용이하게 이루어질 수 있으며, 스텐트가 혈관 내벽에 보다 견고하게 고정되어 혈관 협착의 치료에 보다 효과적일 수 있다.
Abstract:
Die Erfindung betrifft ein Implantat zum Einsatz bei der Okkludierung von Aneurysmen im Bereich von Gefäßverzweigungen, insbesondere Bifurkationsaneurysmen (A), mit einer Maschenstruktur (3, 4), welches von proximal nach distal einen Fixierabschnitt (b), mit dem das Implantat an einer Gefäßwand abstützbar ist, einen durchlässigen Abschnitt (c) für den Bereich der Gefäßverzweigung und einen distalen Abschnitt (d) aufweist, in dem das Implantat gegenüber dem Abschnitt (b) radial erweitert ist und der zur Platzierung im Aneurysma (A) bestimmt ist. Im Bereich der Abschnitte (c) oder (d) ist eine Trennzone (T1, T2) angeordnet, die den Hals des Aneurysmas zumindest teilweise verschließt, wobei der distale Abschnitt (d) eine Mehrzahl von mit dem Abschnitt (c) verbundenen Filamenten und/oder Schlaufen (12) aufweist und die Filamente/Schlaufen (12) zur Längsachse des Implantats (1) einen Winkel zwischen -45° und +175° ausbilden, wobei ein positiver Winkel für nach radial außen und ein negativer Winkel für nach radial innen weisende Filamente/Schlaufen (12) steht. Alternativ kann der distale Abschnitt (d) auch kugelförmig, pilzförmig, ankerförmig oder ellipsoidförmig erweitert sein.