Den gennemsnitlige tid til at opnå maksimal koncentrationer af methæmoglobin var 10 ± 9 (SD) timer (median 8 timer) hos disse 13 patienter; men 1 patient overskred ikke 7% før efter 40 timer.
The average time to reach peak methaemoglobin was 10 ± 9 (SD) hours (median, 8 hours) in these 13 patients; but one patient did not exceed 7% until 40 hours.