IMPLANT WITH SHAPE MEMORY

An implant having capability to expand and contract radially through a range of diameters, with corresponding changes in the cross-sectional area of the lumen, said implant exhibiting a remembered configuration in which the diameter of the implant is at the low end of said range of diameters, such t...

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Bibliographische Detailangaben
Hauptverfasser:	PATHAK, CHANDRASHEKHAR, PRABHAKAR, BLANK, THIEMO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BANDAGES, DRESSINGS OR ABSORBENT PADS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PROSTHESES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	An implant having capability to expand and contract radially through a range of diameters, with corresponding changes in the cross-sectional area of the lumen, said implant exhibiting a remembered configuration in which the diameter of the implant is at the low end of said range of diameters, such that the implant is prompted to change its configuration towards said remembered configuration, that is, towards a reduced diameter configuration, upon the imposition on the implant of outside stimulus; said implant being characterised by: a molecule distributed within its bulk volume that preferentially responds to an applied field that permeates said volume, wherein said applied field constitutes the outside stimulus, and the preferential response of the molecule provides the prompt on the implant to change to the said remembered configuration. L'invention concerne un implant capable d'expansion et de contraction radiale sur une gamme de diamètres, avec modifications correspondantes de la zone de section transversale de la lumière. Il est à mémoire de forme, son diamètre se trouvant à l'extrémité basse de la gamme des diamètres, et l'implant peut être amené à se modifier pour prendre une configuration mémorisée, aux fins de réduction du diamètre, suite à l'application d'un stimulus externe sur l'implant. Ledit implant présente dans son volume brut une molécule distribuée qui répond de façon préférentielle à l'application d'un champ étendu à tout le volume, et le champ en question constitue le stimulus externe. La réponse préférentielle de la molécule induit dans l'implant la modification vers la configuration mémorisée.