INR Ratio
Compute the international normalized ratio as (patient PT / mean normal PT)^ISI. Use the International Sensitivity Index assigned to the specific thromboplastin reagent and instrument; the default of one is only appropriate when that is the calibrated ISI.
Description
Compute the international normalized ratio as (patient PT / mean normal PT)^ISI. Use the International Sensitivity Index assigned to the specific thromboplastin reagent and instrument; the default of one is only appropriate when that is the calibrated ISI.