Although pulse oximetry represents a significant advance in noninvasive monitoring, situations exist where the pulse oximeter may give misleading or inaccurate information, as shown in the following tabulation: Dyshemoglobinemias Carbon monoxide Methemoglobin Fetal hemoglobin Dyes and pigments Methylene blue Indocyanine green Bilirubin Low perfusion Anemia Increased venous pulsations External light sources Pulse oximeters measure oxygen […]
↧