ULTRASOFT EMBOLISM DEVICES AND PROCESS FOR USING

摘要

This invention is an exceptionally flexible, ultrasoft vaso-occlusive or embolism forming device. It is made of radiopaque material which may be a braid (200), coil (100), or chain (600) which forms a long, thin thread-like device having little rigidity or column strength. The diameter of the device may be less than about 0.010 inches. The filamentary material making up the device used to form the coil (100), braid (200), or chain (600) is typically of a diameter less than about 0.002 inches. The device is sufficiently flexible and small that it may be hydraulically delivered to a site within the vasculature of the human body using an injected drug or fluid flush through a catheter (512). In some configurations, the device may be delivered using pushers (504, 512) to mechanically deliver the device through the catheter lumen. Various mechanical connections may be used to sever the coil by a simple connection of a dissimilar metal to allow electrolytic separation upon application of small voltage is desirable (Figs 5A, 5B).