Fig. 2From: Risk factors for epidural anesthesia blockade failure in cesarean section: a retrospective studyThe Kaplan-Meier survival rate of time to epidural anesthesia failure in the patients with and without previous epidural analgesia The survival rate of paturients with previous epidural analgesia drops quicker than those without previous analgesia experience after 12 min of epidural anesthetic administrationBack to article page