What is meant by haemoglobin saturation? What are the factors it depends upon?

Hemoglobin saturation The amount of oxygen combined with hemoglobin in proportion to the amount of oxygen the hemoglobin is capable of carrying. It is expressed as a percentage of a ratio: content/capacity.

FACTORS AFFECTING THE HEMOGLOBIN SATURATION

• The partial pressure of CO2
• pH, independent of CO2
• The concentration of 2,3-DPG inside the erythrocytes
• The presence of unusual haemoglobin species
• Temperature