Table 3.
Results of ultrasonographic measurements in control group and median nerve group
| Control (N = 47) |
Median nerve (N = 47) |
P value | |
|---|---|---|---|
| Radial artery diameter (mm) | < 0.001 | ||
| T1 | 0.25 ± 0.04 | 0.25 ± 0.03 | |
| T2 | 0.26 ± 0.04 | 0.30 ± 0.04 | |
| T3 | 0.20 ± 0.04 | 0.25 ± 0.05 | |
| Percentage change of radial artery diameter at T2(%) | 4(0–8) | 22(14–28) | < 0.001 |
| Percentage change of radial artery diameter at T3(%) | −17[(−24)-9] | 0[(−4.9)-8.7] | < 0.001 |
| CSA (cm2) | < 0.001 | ||
| T1 | 0.052 ± 0.015 | 0.049 ± 0.014 | |
| T2 | 0.054 ± 0.015 | 0.075 ± 0.018 | |
| T3 | 0.033 ± 0.013 | 0.049 ± 0.018 | |
| Percentage change of CSA at T2(%) | 0(0–17) | 50(33–67) | < 0.001 |
| Percentage change of CSA at T3(%) | −33[(−41)-(−25)] | 0[(−3.6)-25.0] | < 0.001 |
| TAMAX (cm/sec) | 0.015 | ||
| T1 | 18 ± 9 | 16 ± 4 | |
| T2 | 23 ± 10 | 31 ± 8 | |
| T3 | 22 ± 8 | 30 ± 11 | |
| Volume of blood flow (ml/sec) | < 0.001 | ||
| T1 | 1.02 ± 0.84 | 0.79 ± 0.32 | |
| T2 | 1.28 ± 0.92 | 2.34 ± 0.92 | |
| T3 | 0.73 ± 0.57 | 1.53 ± 1.03 |
Values are mean ± SD, median (interquartile range) [range].T1 = Baseline; T2 = 10 minutes after median nerve block or local anesthesia; T3 = 30 minutes after median nerve block or local anesthesia. CSA Cross-sectional area, TAMAX Time Average Maximal Velocity