PMC9149194_01
CT of the lungs showing widespread scattered ground glass opacities.
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Chest computed tomography (CT) scan revealed bilateral ground glass opacities scattered over both lung fields (Fig. 1).
Arterial blood gas sample of the patient showing a dark brown color.
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Repeated arterial blood gas analysis showed a dark brown color (Fig. 2), a pO2 of 100 mmHg, a pCO2 of 35.6 mmHg and a methemoglobin of 33.7%.
Evolution of oxygen saturation on pulse oximetry and methemoglobinemia.
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Over the next days, the patient's shortness of breath disappeared completely, oxygen saturation on pulse oximetry improved and the patient's skin color and methemoglobin levels returned to normal (Fig. 3).