Unexpected falsely low pulse oximeter measurements in a child with hemoglobin Southampton

Hemoglobin Southampton complicated by cerebral ischemia, moyamoya, and hydroxyurea‐induced methemoglobinemia

“…13 Despite low SpO 2 readings, she remained clinically well and was discharged on aspirin only. 13 Despite low SpO 2 readings, she remained clinically well and was discharged on aspirin only.…”

“…At this time, her mother recalled that she has a known history of unreliable pulse oximetry readings during anesthesia for her splenectomy. 13 Despite low SpO 2 readings, she remained clinically well and was discharged on aspirin only. Hydroxyurea was not given again because it was temporally associated with exacerbation of the unstable Hb phenotype yielding increased metHb production.…”