A 32-Year-Old Female with AIDS, Pneumocystis jiroveci Pneumonia, and Methemoglobinemia

Figure 2

Absorbance as a function of wavelength for oxyhemoglobin, reduced hemoglobin, and methemoglobin. Transmission pulse oximetry utilizes absorbance at two wavelengths (here red 660 nm and infrared 910 nm) to determine the oxygen saturation of an arterial pulsation of blood into the skin. Adapted from [25].