1284 In Vitro Evaluation of Optimal Device Settings for the Swiss Lithoclast Trilogy Lithotripter

Abstract Aim The LithoClast Trilogy Lithotripter is the latest generation lithotripter. It has four modifiable settings for stone fragmentation - Impact (0-100%), frequency (0-12Hz), ultrasound (0-100%) and suction (0-100%). configuration different types unknown. We aim to determine optimal types. Method Calcium oxalate, calcium phosphate, uric acid struvite 2cm3 phantoms were created using Begostone. Ultrasound kept constant at 100% 40%. adjusted a combination of 10 repeated N = 3. Drill speed fragment size calculated 34mm probes. Results One hundred percent impact 12 Hz resulted in fastest clearance times Struvite phantom stones, mean 83 seconds. For phantoms, 30% 4 was setting clearance, phosphate stones treated an 4Hz (mean 217 seconds). rate oxalate 12Hz 204 slowest 60% 8Hz 269 Conclusions Stone rates, drill speeds average sizes most commonly occurring Swiss Lithoclast results indicate that harder may more efficiently lower device settings.