Case report details vitamin B12 treatment for nitrous oxide induced neurological damage

This case report details the clinical course of a patient with protracted encephalopathy associated with nitrous oxide use. The setting was a hospital environment where the patient received vitamin B12 supplementation as the intervention. The primary outcome measured was the response to vitamin B12 supplementation assessed using the Mini-Mental Status Exam. No specific numerical results or adverse event rates are provided in the source text. The sample size is not reported for this single case. Safety data including adverse events, serious adverse events, discontinuations, and tolerability were not reported. The follow-up duration was not reported. The authors acknowledge the paucity of long-term outcome data as a limitation. Funding or conflicts of interest were not reported. The causality note indicates that nitrous oxide use is known to cause subacute combined degeneration via inactivation of vitamin B12 and may also result in acute delirium and chronic progressive encephalopathy. The conditions discussed include subacute combined degeneration, protracted encephalopathy, and acute delirium. The medications involved are nitrous oxide and vitamin B12. Current practice guidelines call for treatment of neurological sequelae of nitrous oxide use with vitamin B12 supplementation. This report provides a qualitative account rather than quantitative pooled data.