Figure 14: Stretching and straightening the vessel with a parallel wire
In (a), the proximal bend is obstructing wire maneuverability and making it impossible to reach the distal true lumen, but by (b) and (c) inserting a wire as deep as possible into a distal side-branch to stretch and straighten the vessel, the second wire is able to locate a new channel and cross to the distal true lumen (d).