PD37-04 BALL-TIP HOLMIUM LASER FIBER: IN VITRO STONE COMMINUTION AND FIBER TIP DEGRADATION

reach statistical significance [254.5 sec (IQR1⁄4 173-302) vs 296.5 sec (IQR1⁄4 226-398) respectively, p1⁄4 0.112]. The stone-free rate for the PercSac group was 100 vs 0% for the control group. CONCLUSIONS: Ultrasonic lithotripsy using the PercSac device is more efficient and efficacious than traditional ultrasonic lithotripsy in a bladder model. This advantage may be even more pronounced during clinical PCNL where residual fragments migrate into difficult-to-access calyces. Further in vitro and in vivo testing in both kidney and bladder models is underway.