Figure 2.

Detachment zone (schematic drawing), used to connect the self-expanding stent to a delivery system. Two platinum coils are connected to each other through a stainless-steel-bridge. The other ends of these coils are connected to the delivery system and the stent. The steel bridge is firm enough to allow complete retrieval of the stent into the microcatheter if required. Stent detachment is accomplished by interrupting the steel bridge by the application of direct current (2 mA, 4-6 V, 30-60 sec).