The Horowitz index for Lung Function (P/F ratio) assesses lung function, particularly in intubated patients.

Use this PF ratio calculator to know if the patient is hypoxemic and requires immediate treatment.

Calculate the PaO2/FiO2 ratio with FiO2 fraction and PaO2 (mmHg or kPa).

Definition: This calculator computes the PaO2/FiO2 ratio (P/F ratio) to assess lung oxygenation efficiency. Purpose: It helps evaluate hypoxemia severity, often used in diagnosing Acute …

P/F Ratio Calculator (PaO2/FiO2) Calculate the P/F Ratio to evaluate a patient's lung oxygenation. Discover its normal values and importance in cases of hypoxemia and ARDS.

To calculate the PF ratio, you need to know the PaO2 and FiO2 values, which can be obtained from an arterial blood gas (ABG) test and through oxygen supplementation, respectively.

Aug 11, 2019 · P/F ratio is a powerful tool to identify acute hypoxemic respiratory failure on oxygen, especially now. Learn to calculate the P/F ratio with our calculator.

Dec 9, 2025 · To effectively use the Pao2 Fio2 Ratio Calculator, follow these steps: Input Fields: Enter the arterial oxygen partial pressure (Pao2) in mmHg and the fractional inspired oxygen (Fio2) as a …

Apr 17, 2020 · This Horowitz index calculator determines the PaO2/FiO2 ratio which assesses lung function in acute respiratory distress.

By inputting the details, our PF Ratio Calculator calculates the pulmonary function (PF) ratio for respiratory assessment.