Enter the pulsatile signal (AC) and the nonpulsatile signal (DC) into the Calculator. The calculator will evaluate the Perfusion Index.

## Perfusion Index Formula

PI = PS / NS * 100

Variables:

- PI is the Perfusion Index (%)
- PS is the pulsatile signal (AC)
- NS is the nonpulsatile signal (DC)

To calculate Perfusion Index, divide the pulsatile signal by the nonpulsatile signal, then multiply by 100.

## How to Calculate Perfusion Index?

The following steps outline how to calculate the Perfusion Index.

- First, determine the pulsatile signal (AC).
- Next, determine the nonpulsatile signal (DC).
- Next, gather the formula from above = PI = PS / NS * 100.
- Finally, calculate the Perfusion Index.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

pulsatile signal (AC) = 400

nonpulsatile signal (DC) = 300