Erratum to: Unexpectedly low pulse oximetry measurements associated with variant hemoglobins: A systematic review

Abstract Pulse oximetry estimates arterial blood oxygen saturation based on light absorbance of oxy‐ and deoxy‐hemoglobin at 660 and 940 nm wavelengths. Patients with unexpectedly low SpO 2 often undergo cardio‐pulmonary testing to ascertain the cause of their hypoxemia. However, in a subset of patients, a variant hemoglobin is responsible for low SpO 2 measurements. The extent of this problem is unclear. We performed a systematic literature …