“…Reflections on radioprotection during ballooning procedures are no longer valid due to the introduction of the LUMA technique [ 1078 ], [ 1119 ] and navigated guide wires. Nevertheless, the measured irradiation exposition is very low for the patients (eye, total dose) and the ENT surgeon (hand, total dose, breast) and it is significantly below the critical threshold dose or the natural radiation exposure, however, it must be observed nonetheless [ 1119 ], [ 1120 ], [ 1121 ], [ 1122 ]. New developments concern a flexible tip, multifunctional dilatation products (probe, rinsing, and ballooning) [ 1123 ], the additional application of rinsing systems [ 1124 ], and navigable guiding catheters [ 1125 ] or guide wires.…”