PI is a non-invasive numerical technique derived from a pulse oximeter signal that reflects real-time changes in peripheral perfusion. It is calculated by the ratio of infrared light absorbed by the pulsating arterial flow (AC) against the non-pulsatile signals in blood and tissues (DC) and expressed as (AC × 100/DC%).

_{Dec 26, 2022}

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Perfusion Index or PI is the ratio of the pulsatile blood flow to the non-pulsatile static blood flow in a patient's peripheral tissue, such as finger tip, ...

The PI value is calculated as the ratio of the pulsatile blood flow to the non-pulsatile blood flow in the peripheral tissue, expressed as a percentage. A ...

Mar 13, 2012 ˇ PI is calculated by dividing the pulsatile signal (AC) by the nonpulsatile signal (DC) times 100, and is expressed as a percent ranging from 0. ...

Aug 12, 2021 ˇ Simply put, it is the ratio of pulsing blood to non-pulsing blood. This measurement can be acquired non-invasively and is a good indicator of a ...

Mar 18, 2024 ˇ To calculate Perfusion Index, divide the pulsatile signal by the nonpulsatile signal, then multiply by 100. How to Calculate Perfusion Index?

Feb 17, 2022 ˇ Perfusion Index is the ratio of pulsing to non-pulsing blood. This represents a measure of peripheral perfusion that can be tracked non-invasively.

DC corresponds to light absorption from other tissues, such as non-pulsatile capillaries and venous vessels, skin, soft tissues, and bones. DC is not displayed ...

The perfusion index (PI) is the ratio of the pulsatile blood flow to the nonpulsatile or static blood in peripheral tissue. Perfusion. Index thus represents a ...

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Aug 27, 2021 ˇ I found some resources that says, to get PI value we need to divide (IRACvalue / IRDCValue)*100, to get IRACvalue (Please refer below code).