P/F (adultos)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
P/F
About this calculator
The PaO2/Fio2 Calculator for Adults is an essential tool for healthcare professionals, such as doctors and nurses, who need to assess the effectiveness of treatment for patients with chronic respiratory diseases.
The formula used by the calculator is simple and direct: PaO2 / (FiO2/100), where PaO2 is the arterial blood oxygen level and FiO2 is the inspired oxygen fraction. By calculating the PaO2/Fio2 ratio, healthcare professionals can determine whether the patient is receiving sufficient oxygen and if the pulmonary function is being adequately supported.
The PaO2/Fio2 Calculator for Adults is particularly useful for cases of chronic respiratory diseases, such as chronic obstructive pulmonary disease (COPD) and cystic fibrosis. It is also essential for evaluating the effectiveness of treatments such as oxygen therapy and mechanical ventilation.
It is essential to remember that the calculator does not replace clinical assessment and the results should be interpreted by qualified healthcare professionals.
Frequently asked questions
What is the PaO2/Fio2 ratio and why is it important?
The PaO2/Fio2 ratio is a critical measure of pulmonary function. It indicates whether the patient is receiving sufficient oxygen and if pulmonary function is being adequately supported.
When should I use the PaO2/Fio2 calculator?
The calculator should be used in cases of chronic respiratory diseases, such as COPD and cystic fibrosis, and to evaluate the effectiveness of treatments like oxygen therapy and mechanical ventilation.
What is the formula used by the calculator?
The formula used by the calculator is PaO2 / (FiO2/100), where PaO2 is the arterial blood oxygen level and FiO2 is the inspired oxygen fraction.
What do I do with the calculator results?
The results of the calculator should be interpreted by qualified healthcare professionals. Clinical assessment and analysis of results should be done in conjunction with the calculator.
Can I use the calculator if I'm a patient?
No. The calculator is intended for healthcare professionals and should be used under the guidance of a doctor or nurse.