MP22-17 COMBINED ROBOTIC FLEXIBLE URETERORENOSCOPY AND MINI PERCUTANEOUS LITHOTRIPSY IN SUPINE POSITION

fragments and another stone was placed. Three measurements were performed for each setting. Mean values of the displacement of the stone were calculated. RESULTS: The table shows the results of the measurements. Power, JouleFrequency, HzMean Displacement, mm (Pulse duration Long1⁄4L, Short1⁄4S) 0.5 5Hz 1.18 0.23 (L) 2.07 0.13 (S) 0.5 10 0.54 0.49(L) 1.94 1.38(S) 0.5 20 0.59 0.41(L) 1.35 0.26(S) 1 10 1.94 1.38(L) 2.03 0.66(S) 1 20 1.77 0.71(L) 2.2 1.98(S) 2 5 2.51 0.77(L) 3.53 1.43(S) 3 5 2.54 1.2(L) 2.55 1.61(S) The activation of the laser with short pulse resulted in further displacement of the stone. Lower frequency with the same power setting seemed to result in further stone retropulsion. Higher power with the same frequency setting resulted in further displacement of the stone. CONCLUSIONS: The laser setting with Phaspody H-30 for minimal stone retropulsion would include high frequency, low power and long pulse duration.