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Changes of radial artery depth.
| Variables | Saline group (n = 17) | Phentolamine group (n = 18) | Phentolamine+lidocaine group (n = 20) | P value |
|---|---|---|---|---|
| Depth before injection (mm) | 2.86 ± 0.11 | 2.83 ± 0.15 | 2.89 ± 0.17 | 0.561 |
| Depth after injection (mm) | 3.38 ± 0.16 | 3.29 ± 0.25 | 3.19 ± 0.32 | 0.091 |
| P value | <0.01 | <0.01 | <0.01 | |
| Depth after catheterization (mm) | 3.42 ± 0.23 | 3.32 ± 0.21 | 3.22 ± 0.31 | 0.072 |
