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. 2015 Jun 22;5(3):e21960. doi: 10.5812/aapm.21960v2

Figure 2. Duration and Onset of Sensory and Motor Nerve Blocks.

Figure 2.

Group A had no history of chronic opium use and received 30 mL hyperbaric bupivacaine along with 2 mL saline as placebo. Group B had no history of opium use and received 30 mL hyperbaric bupivacaine along with 2 mL sufentanil. Group C had a positive history of chronic opium use and received 30 mL hyperbaric bupivacaine along with 2 mL saline as placebo. Group D had a positive history of chronic opium use and received 30 mL hyperbaric bupivacaine along with 2 mL sufentanil (10 µg).