Effects of Ropivacaine in Patient-Controlled Epidural Analgesia on Uterine Electromyographic Activities during Labor

Figure 2

Representative EMG images. The representative recordings of ropivacaine group during the 1st stage of labor showing EMG signals from abdominal muscle (top tracings in red), uterine (middle tracings in blue), and TOCO signals (bottom tracings in green). A horizontal line above some of the bursts denotes bursts. The TOCO recorded signals (green tracings) correspond to TOCO recorded uterine contractions and occur at about the same time as EMG bursts.