What is the normal CO2 level in SPO2?

SpO2 refers to the peripheral capillary oxygen saturation, which measures the percentage of hemoglobin saturated with oxygen in the blood, typically reported as a value between 95% and 100%. CO2 levels are not directly measured by SpO2; instead, they are assessed through arterial blood gases (ABG) or capnography. Normal arterial CO2 levels (PaCO2) generally range from 35 to 45 mmHg. It's important to monitor both oxygen and carbon dioxide levels for a comprehensive assessment of respiratory function.