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To see if methemoglobin could potentially be misdiagnosed and the limitation of present co-oximeters.
A 17-year-old girl who overingested a combination of cimetidine, acetaminophen, ibuprofen, and naproxen in a suicide attempt.
Use of pulse co-oximeters to aid in the diagnosis of suspected sulfhemoglobinemia.
Diagnosis of sulfhemoglobinemia achieved with final confirmation made with gas chromatography. Patient steadily improved with supportive care.
There is a potential for the diagnosis of methemoglobin with some of the limitations of present co-oximeters. The laboratory diagnosis of sulfhemoglobinemia can be difficult to make.
Lu HC, Shih RD, Marcus S, Ruck B, Jennis T. Pseudomethemoglobinemia: A Case Report and Review of Sulfhemoglobinemia. Arch Pediatr Adolesc Med. 1998;152(8):803–805. doi:10.1001/archpedi.152.8.803
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