Table 4 Cannulation characteristics
|  | dTRI group (n = 151) | TRI group (n = 151) | P value |
|---|---|---|---|
Whole success cannulation | 136 (90.0) | 148 (98.0) | 0.04 |
Number of puncture attempts | 1.656 ± 1.195 | 1.139 ± 0.490 |  < 0.001 |
One-time successful cannulation | 104 (68.9) | 137 (90.7) |  < 0.001 |
Crossover to other approach | |||
 Cannot puncture* | 6 (4.0) | 1 (0.7) | 0.121 |
 Cannot wire* | 8 (5.3) | 0 | 0.007 |
 Sheath failure* | 1 (0.7) | 2 (1.3) |  > 0.999 |
Puncture time (min) | 3.479 ± 1.102 | 1.207 ± 0.659 |  < 0.001 |
Hemostasis time (min) | 173.272 ± 41.817 | 273.417 ± 42.098 |  < 0.001 |
VAS pain score | 2.311 ± 3.858 | 1.543 ± 0.839 |  < 0.01 |
Satisfaction score | 8.146 ± 1.157 | 7.940 ± 1.555 | 0.194 |