The Chocolate™* PTA balloon, the only nitinol-caged balloon with Controlled Dilatation, was designed for 1:1 vessel sizing to minimise flow-limiting dissections and reduce recoil.

As the balloon inflates, the cage causes the balloon to form a series of segmented pillows and grooves along the entire lesion. The pillows apply force to create small dissections that are necessary for effective dilatation. The grooves relieve the stress and stop dissections from propagating.