Table 1. Patient demographics and stone location (PUJ – pelvic-ureteric junction).
| No. of patients (procedures) | 110 (121) | |
|---|---|---|
| Mean age, years (range) | 77.2 years (70-91 years) | |
| 70-75 | 43 | |
| 75-80 | 35 | |
| 80-85 | 29 | |
| >85 | 14 | |
| ASA I/II/III/IV | 7/63/50/1 | |
| Median age, years | 77 | |
| Pre-operative creatinine (μmol/L), mean±SD | 104±57 | |
| Pre-operative stent n(%) | 32 (26%) | |
| Pre-operative positive urine culture (appropriately treated pre-operatively) n (%) | 32 (26%) | |
| Multiple stones n (%) | 40 (32%) | |
| Stone position (single) | ||
| Upper pole, n (%) | 2 (2%) | |
| Middle pole, n (%) | 4 (3%) | |
| Lower pole, n (%) | 16 (13%) | |
| PUJ / Renal pelvis, n (%) | 13 (11%) | |
| Upper ureter, n (%) | 6 (5%) | |
| Middle ureter, n (%) | 15 (12%) | |
| Lower ureter, n (%) | 24 (20%) | |
| Stone position (multiple) | ||
| Multiple ureteric n(%) | 15 (12%) | |
| Multiple Renal n(%) | 16 (13%) | |
| Multiple ureteric and renal n(%) | 9 (7%) | |
| Mean largest individual stone diameter (range) | 10.6 (3-37) | |
| Mean cumulative stone diameter, mm (range) | 17.1 (3-156) | |