a nonsignificant trendP = 0.245
Number of Sessions, Need for Mechanical Lithotripsy, and Procedure Duration Among the four studies [ 17 – 19 , 21 ] that reported the mean number of sessions needed for complete stone clearance, there was a nonsignificant trend toward fewer sessions needed among those who underwent ES + EPLBD versus ES (1.3 ± 0.3 versus 1.8 ± 0.7, P = 0.245).