Abstract
Between January 2011 and December 2011, 86 patients undergoing operation for anorectal disease were randomized in a double-blind manner to receive a mixed injection of methylene blue, ropivacaine and sodium chloride (observation group, n=43) or traditional analgesic methods (control group, n=43). Patients in observation group had less visual analog scale (VAS) scores of pain at 6-48 h postoperation than control group (P 0.05). The total postoperative complications (8, 19%) and hospitalization duration [(5.3±2.2) days] in observation group were significantly less than those [15, 35% and (6.4±1.7) days] in control group (P<0.05). A mixed injection of methylene blue and ropivacaine intraoperatively can relieve the postoperative pain of patients with anorectal disease and reduce the incidence of postoperative complications and the duration of hospitalization. Key words: Anus diseases; Methylene blue
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