Fig. (15).

Case involving knuckle wire and CrossBoss with successful Stingray re-entry. Long proximal RCA CTO with moderate disease in distal vessel (white arrow). Inset = Balloon + knuckle formation to cross heavily calcified lesion (black arrow points to end of knuckle) b. CrossBoss used to extend sub-intimal track to distal “landing zone” (black arrow indicates CrossBoss tip) c. Stingray balloon (left) and wire re-entry (right – black arrow indicates wire exit site from balloon and white arrow indicates wire within true lumen) d. Final result.