A method of positioning a main stent at a vessel bifurcation includes positioning a main guidewire in the main vessel; and advancing a stent delivery system to a position proximate the bifurcation. The latter includes a printed circuit linked to the one in the console and is operated by a power supply connected to the mains. In use, the headband, retaining comb, or barrette is attached to the hair. The computing device creates an artificial chunk boundary when the end of data of the storage object is reached.