Application of ropivacaine hydrochloride combined with hydromorphone fine needle spinal anesthesia in cesarean section
LI Jian-zhong, MA Shi-jun, YI Liang, FENG Li, YANG Ai-jie
Journal of Hebei Medical University . 2021, (1): 66 -70 .  DOI: 10.3969/j.issn.1007-3205.2021.01.014