1. A combination introducer and stylet, the combination comprising: an elongated substantially tubular introducer extending along a longitudinal axis from a proximal end to a sharpened distal end, the introducer including at least one window positioned at a predefined location along the longitudinal axis from a distal tip, the introducer including a radio-opaque material; and an elongated stylet extending along a longitudinal axis from a proximal end to a distal end, the stylet being adapted to be received in a lumen of the tubular introducer, wherein the proximal end of the introducer is adapted to releasably engage with the proximal end of the stylet when the stylet is placed in the lumen of the introducer.