Pro-Con Debate: Nitrous Oxide for Labor Analgesia

Figure 1

Nitrous oxide effect on methionine synthase and folate metabolic cycle. Chan MT, Peyton PJ, Myles PS, Leslie K, Buckley N, Kasza J et al. Chronic postsurgical pain in the Evaluation of Nitrous Oxide in the Gas Mixture for Anaesthesia (ENIGMA)-II trial. Br J Anaesth. 2016:117:801-11.