Fig. 2From: Intrathecal magnesium sulfate does not reduce the ED50 of intrathecal hyperbaric bupivacaine for cesarean delivery in healthy parturients: a prospective, double blinded, randomized dose-response trial using the sequential allocation methodIndividual response to intrathecal hyperbaric bupivacaine at corresponding dose. Unfilled square (□) represents an ineffective response to the corresponding dose of intrathecal bupivacaine for spinal anesthesia. Filled square (■) represents an effective response to the corresponding dose of intrathecal bupivacaine for spinal anesthesia. Solid line represents the ED50 (dashed lines represent the 95% confidence interval, CI) of intrathecal hyperbaric bupivacaine for caesarean deliveryBack to article page