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

Figure 1

Analgesic effects of levobupivacaine and ropivacaine. VAS: visual analog scale for pain. The VAS score did not differ statistically between the two groups at the same time points. The horizontal red and blue lines indicate 7 and 3 on the VAS scale, respectively (7–10 for severe pain, 4–6 for moderate pain, and 0–3 for mild pain).