title: [Clinical study on different concentration of ropivacaine for postoperative patient controlled analgesia].
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xu
authors.forename: Tian-Zuo
authors.initials: TZ
authors.lastname: Li
authors.forename: Bing-Xig
authors.initials: BX
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000577:Amides / Q000008:administration & dosage*; D016058:Analgesia, Patient-Controlled / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D010149:Postoperative Pain / Q000517:prevention & control*; D000077212:Ropivacaine; D055815:Young Adult
chemical_list: D000577:Amides; D000077212:Ropivacaine