Relative potencies of bupivacaine, levobupivacaine, and ropivacaine for neonatal spinal anaesthesia

Appropriate doses for infant spinal anaesthesia are 1 mg kg−1 of isobaric 0.5% bupivacaine and ropivacaine and 1.2 mg kg−1 of isobaric 0.5% levobupivacaine.