Table 2 Comparison of block features between the study groups
US + NS (n = 35) | NS (n = 35) | P | |
|---|---|---|---|
Overall block time (sec) | 379.97 ± 145.52 | 461.71 ± 152.57 | 0.02 |
Time to perform tibial block (sec) | 138.86 ± 77.75 | 180.86 ± 75.31 | 0.02 |
Time to perform common peroneal block (sec) | 243.97 ± 123.32 | 280.86 ± 118.67 | 0.2 |
Total motor block at 30 min (%) | 30/35 (85.7) | 22/35 (62.8) | 0.029 |
Block success at 30 min (%) | 33/35 (94.2) | 33/35 (94.2) | > 0.05 |
Onset time tibial block (min) | 17.4 ± 5.0 | 18.5 ± 6.3 | 0.6 |
Onset time common peroneal block (min) | 17.8 ± 7.6 | 19.2 ± 6.2 | 0.3 |
No. of needle insertions | 2.2 ± 0.9 | 1.6 ± 0.73 | 0.004 |