不同剂量罗哌卡因复合芬太尼硬膜外麻醉对产妇分娩中疼痛症状和母婴结局的影响
불동제량라고잡인복합분태니경막외마취대산부분면중동통증상화모영결국적영향
Effect of Different Dose of Ropivacaine Combined with Fentanyl in Epidural Anesthesia on Maternal Childbirth Pain Symptoms and Pregnancy Outcome
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