Table 2.
Intraoperative and postoperative characteristics of analyzed group of patients.
| Group I (n=123) | Group II (n=99) | P value | ||
|---|---|---|---|---|
| Total operative time, min (SD) | 114 (46) | 103 (48) | 0.74 | |
| Tract formation time, min (SD) | 6.5 (3.2) | 8.3 (4.1) | 0.58 | |
| Fluoroscopy time, min (SD) | 7.5 (4.2) | 9.4 (3.3) | 0.49 | |
| Tract dilation failure, no (%) | Yes | 12 (9.7) | 4 (4) | 0.1 |
| No | 111 (90.2) | 95 (95.9) | ||
| Residual stones, no (%) | Yes | 17 (13.8) | 15 (15.1) | 0.77 |
| No | 106 (86.1) | 84 (84.8) | ||
| Hemoglobin drop, g/dl (SD) | 2.1 (0.9) | 2.5 (1.3) | 0.48 | |
| Blood transfusion, no (%) | Yes | 4 (3.2) | 5 (5) | 0.49 |
| No | 119 (96.7) | 94 (94.9) | ||
| Punctured calyx | Upper | 6 (4.8) | 36 (36.3) | <0.001 |
| Middle | 25 (30.8) | 56 (56.5) | ||
| Lower | 92 (74.8) | 7 (7.1) | ||
| Access to kidney, no (%) | Intercostal | 40 (32.5) | 91 (91.9) | <0.001 |
| Infracostal | 83 (67.4) | 8 (8) | ||
| Number of accesses, no (%) | One | 109 (88.6) | 82 (82.8) | 0.21 |
| More than one | 14 (11.3) | 17 (17.1) | ||
| Clavien-Dindo complication scale, no (%) | No | 82 (66.6) | 76 (76.8) | 0.03 |
| I | 18 (14.6) | 3 (3) | ||
| II | 12 (9.7) | 8 (8) | ||
| IIIa | 3 (2.4) | 2 (2) | ||
| IIIb | 2 (1.6) | 2 (2) | ||
| IVa | 2 (1.6) | 7 (7) | ||
| IVb | 4 (3.2) | 1 (1) | ||
| Visual analogue scale, median* | 3.5 | 3.2 | 0.31 | |
*
Assessed one day after procedure.