Clinical Study
Effects of Ropivacaine in Patient-Controlled Epidural Analgesia on Uterine Electromyographic Activities during Labor
Table 4
Uterine EMG activities in the ropivacaine group.
| | | 30 min | 60 min | 120 min | P value | | n = 26 | n = 27 | n = 25 |
| | Duration (s) | 46.29±2.37 | 49.65±2.58 | 52.22±2.56 | 0.26 | | Number of bursts (n) | 3.31±0.13 | 3.48±0.11 | 3.68±0.11 | 0.09 | | RMS (mV) | 0.06±0.01 | 0.06±0.01 | 0.06±0.01 | 0.97 | | Power (nV2) | 5.95±1.71 | 5.42±1.15 | 7.26±3.52 | 0.85 | | Peak frequency (Hz) | 0.43±0.01 | 0.47±0.01 | 0.44±0.01 | 0.06 |
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RMS: root mean square. Data are presented as mean ± standard error of the mean.
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