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Median effective dose (ED50) of intrathecal ropivacaine for labor analgesia initiation in nulliparous vs. multiparous women: an up-down sequential allocation study.

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Title: Median effective dose (ED50) of intrathecal ropivacaine for labor analgesia initiation in nulliparous vs. multiparous women: an up-down sequential allocation study.
Authors: Yan ZR; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Xiao PH; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Liu M; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Huang Y; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Miao LY; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Chen XF; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Zhang LX; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China., Zhang SJ; Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350001, Fujian Province, China. Electronic address: zhangsujing@fjsfy.com.
Source: International journal of obstetric anesthesia [Int J Obstet Anesth] 2026 May; Vol. 66, pp. 104890. Date of Electronic Publication: 2026 Mar 01.
Publication Type: Journal Article
Journal Info: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9200430 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-3374 (Electronic) Linking ISSN: 0959289X NLM ISO Abbreviation: Int J Obstet Anesth Subsets: MEDLINE
Database: MEDLINE Ultimate
Description
ISSN:1532-3374
DOI:10.1016/j.ijoa.2026.104890