On Oxygen Meter What Is Pi?

Perfusion Index (PI) derived from pulse oximetry represents a measure of peripheral perfusion that can be measured continuously and noninvasively. PI is the ratio of pulsatile blood flow to non-pulsatile static blood flow in a patient's peripheral tissue.

What is normal PI in oximeter?

The normal perfusion index (PI) ranges from 0.02% to 20% showing weak to strong pulse strength. How accurate is it? You can never say that your oximeter is 100% accurate. It can show a 2% over or 2% under due to your arterial blood gas or mechanical fault.

What is the PI percentage on an oximeter?

Perfusion index is an indication of the pulse strength at the sensor site. The PI's values range from 0.02% for a very weak pulse to 20% for an extremely strong pulse. The perfusion index varies depending on patients, physiological conditions, and monitoring sites.