Table 2.
Clinical outcomes of NTFS-UAS group and T-UAS group
| NTFS-UAS group | T-UAS group | t/χ2 | P value | |
|---|---|---|---|---|
| Total number, (n) | 102 | 112 | ||
| Operative time (min), mean ± SD | 55.25 ± 11.42 | 59.36 ± 15.59 | 2.209 | 0.028 |
| Hemoglobin loss (g/dl), mean ± SD | − 0.54 ± 0.69 | − 0.83 ± 0.66 | 3.081 | 0.002 |
| Postoperative hospitalization (days), mean ± SD | 2.86 ± 1.11 | 2.76 ± 1.51 | 0.569 | 0.570 |
| SFR at postoperative day 1, n (%) | 88 (86.3%) | 84 (75.0%) | 4.302 | 0.038 |
| SFR at postoperative day 30, n (%) | 93 (91.2%) | 91 (81.3%) | 4.364 | 0.037 |
| Total complications, Clavien grade classification, n (%) | 12 (11.8%) | 28 (25.0%) | 6.153 | 0.013 |
| Fever (> 38 °C) (G I) | 4 (3.9%) | 11 (9.8%) | 2.851 | 0.091 |
| Persistent hematuria (G I) | 2 (2.0%) | 3 (2.7%) | 0.000 | 1.000 |
| Urosepsis only need additional antibiotics (G II) | 4 (3.9%) | 7 (6.3%) | 0.594 | 0.441 |
| Subcupsular hematoma (G III) | 0 | 1 (0.9%) | – | – |
| Steinstrasse (G III) | 0 | 2 (1.8%) | – | – |
| Ureteroscopy under local anesthesia (G III) | 1 (1.0%) | 1 (0.9%) | 1.000 | |
| Septic shock (G IV) | 1 (1.0%) | 3 (2.7%) | 0.169 | 0.681 |
| Stone composition, n (%) | 85 | 92 | 1.901 | 0.777 |
| Calcium oxalate | 50 (58.8%) | 55 (59.8%) | ||
| Calcium phosphate | 13 (15.3%) | 17 (18.5%) | ||
| Uric acid | 9 (10.6%) | 7 (7.6%) | ||
| Struvite | 12 (14.1%) | 10 (10.9%) | ||
| Cystine calculus | 1 (1.2%) | 3 (3.2%) |
NTFS-UAS novel tip-flexible suctioning ureteral access sheath, T-UAS traditional ureteral access sheath, SD standard deviation, SFR stone-free rates