Anchor balloon technique This model has a high grade narrowing here. New ballon crosses this lesion easily. Inflate the balloon slightly to make relative high-grade narrowing. Then, the balloon hardly crosses the lesion because the guiding catheter(GC) loses its back-up force due to prolapse. Anchor balloon technique helps the balloon cross the lesion. For example, inflation of the balloon in the LCX gives the system having the high back-up force to cross the lesion of LAD in this model. Even the slightly inflated balloon crosses the lesion. Mechanism of anchor balloon technique. You can get a deep seating position of the GC when you pull the anchor balloon (CX balloon). Manipulation of anchor balloon technique. Grip the anchor balloon and two wires with your left hand. You can get the high back-up force of the GC by pulling the anchor balloon and the two wires. Negotiate the lesion by using this force.