Pulse oximetry – a) Locates the isobestic point of hemoglobin and measure oxygen saturationb) Is inaccurate in the presence of fetal hemoglobinc) Is inaccurate in the presence of caboxyhemoglobind) Measures oxygen content
Pulse oximetry is used to determine :- i) Hb concentration by isobetric points location, and ii) Oxygen saturation (But not oxygen content).
Carboxy-hymoglobin can cause inaccurate reading but not the fetal hemoglobin.
a
bc
ac
b