Pi in oximeter means - Why Choose Perfusion Index with Trend

High Perfusion Index So, besides telling you that your pulse may be strong or weak in an extremity such as your fingers or toes, what does the perfusion index indicate? Should the perfusion index reading be under0.

Once again, studies have proved a correlation between an increase in Perfusion Index levels and dilation of the peripheral blood vessel, which usually occurs just before anesthesia.

A value of less than 0.

Outside of general practice, pulse oximetry is most frequently used to monitor patients with lung and heart disorders, who are at risk of low levels of blood oxygen.