The effect of addition of intrathecal clonidine to hyperbaric bupivacaine on postoperative pain and morphine requirements after Caesarean section: a randomized controlled trial I. van Tuijl, W. A. van Klei, D.B.M. van der Werff, C.J. Kalkman British Journal of Anaesthesia Volume 97, Issue 3, Pages 365-370 (September 2006) DOI: 10.1093/bja/ael182 Copyright © 2006 British Journal of Anaesthesia Terms and Conditions
Fig 1 Kaplan–Meier plot of time to first analgesic request. In patients in whom clonidine (Group BC) or saline (Group B) was added to the spinal injection. British Journal of Anaesthesia 2006 97, 365-370DOI: (10.1093/bja/ael182) Copyright © 2006 British Journal of Anaesthesia Terms and Conditions