catheter and a Foley catheter were used, while in group 2 only a 6 F retrograde ureteric catheter and Foley catheter were placed at the end of the procedure. Computed tomography (CT) with no contrast medium was done on the first morning after surgery before removing all catheters/tubes, and patients discharged subsequently. The variables assessed were stone clearance, hospital stay, analgesic requirement, postoperative complications and auxiliary procedures.
RESULTSThe mean ( SD ) stone bulk was similar between the groups, at 2737 (946.9) and 2934.2 (2090.7) μ L, respectively. Despite an on-table complete clearance, clearance assessed by CT was nine of 11 vs eight of 11 in groups 1 and 2, respectively. CT showed a 6mm stone in one patient in group 1, while the remaining patients had stones of < 4mm. The mean ( SD ) analgesic requirement, haemoglobin decrease, urine leak and hospital stay in the two groups were 72.7 (51.8) vs 68.2 (46.2)mg of tramadol ( P = 0.25), 1.6 (0.7) vs 1.6 (0.9)g/dL ( P = 0.39), 13.9 (6.3) vs 7.1 (14.2)h ( P = 0.018) and 72.8 (2.1) vs 70.2 (18.5)h ( P = 0.09), respectively. Complications noted were early haematuria in none vs three ( P = 0.21), urinoma none vs one, and fever in two vs one, respectively; one patient in group 1 required a check nephroscopy for a residual fragment. Overall clearance including re-treatment was 10/11 vs eight of 11 ( P = 0.009), respectively.