Concept on PaO2 SpO2 Hypoxia and Principles of Pulse Oximeter | Medvarsity

The pulse oximeter, with its ability to continuously and transcutaneously monitor the functional oxygen saturation of hemoglobin in arterial blood, has revolutionized modern medicine (SaO2).

Pulse oximetry is so common in medical care that it is frequently regarded as a fifth vital sign. It is critical to understand how the technology works as well as its limitations because incorrect readings can result in unnecessary testing. Pulse oximetry is based on the fact that O2Hb and HHb absorb red
and near-Infrared (IR) light differently.

O2Hb and HHb have significant differences in absorption at red and near-IR light, which is fortunate because these two wavelengths penetrate tissues well, whereas blue, green, yellow, and far-IR light are significantly absorbed by nonvascular tissues and water.

Dr. Sai Praveen Haranath discusses everything you need to know about concept on PaO2, SpO2, hypoxia and the principles of pulse oximeter.