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A 26-year-old woman is brought to the ED by her fiance with cyanosis and shortness of breath. Gradually over the last few days she has also experienced headaches, fatigue, and dizziness. Her past medical history is significant only for mild anemia attributed to menorrhagia, for which she takes an iron supplement. Per her fiance, she was recently laid-off, but is very excited about her new entrepreneurial endeavor of selling silk scarfs that she dyes in their basement. She is afebrile, tachypneic, and tachycardic, and her oxygen saturation is 85% on room air, which seems high for her perceived degree of cyanosis. An arterial blood gas is drawn and the patient's blood is chocolate-colored. After a few minutes on 6 liters nasal canula, her oxygen saturation is still 85%. In addition to maintaining her airway, breathing, and circulation, what treatment should this patient also receive?
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