An apparatus includes an embolic coil including a mechanically flexible tubular member having a central lumen and a plurality of expandable sheaths spaced along the axial length of the tubular member, each expandable sheath enveloping and corresponding to the plurality of apertures, the expandable sheaths configured to have an initial low profile arrangement and upon introduction of an expansion medium to the central lumen of the tubular member radially expands to a high profile arrangement. Methods for making and using the apparatus are also described.
