Alveolar Gas Equation Calculator

The Alveolar Gas Equation is a mathematical formula used in medicine, particularly in pulmonology and critical care, to estimate the partial pressure of oxygen in the alveoli of the lungs. This pressure plays a significant role in the process of oxygenation and deoxygenation of blood. This tutorial will provide an in-depth understanding of the Alveolar Gas Equation, including its interesting facts, the science behind its calculation, its relevance in different fields, real-life applications, and the achievers who have contributed to its development.

Alveolar Gas Equation Calculator
Alveolar Gas Equation Calculator Results
Alveolar Gas Equation (PAO2) mmHg

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

[ 3 Votes ]

It's an interesting fact that the Alveolar Gas Equation came into existence based on the laws of physics applied to gas exchange in the lungs. The equation itself is an essential tool for understanding respiratory physiology and diagnosing pulmonary disorders.

The formula for calculating the partial pressure of oxygen in the alveoli (PAO2) is:

PAO2 = FiO2 (Patm - PH2O) - PaCO2 / R


FiO2 is the fraction of inspired oxygen,

Patm is the atmospheric pressure,

PH2O is the water vapor pressure,

PaCO2 is the arterial carbon dioxide pressure,

And R is the respiratory quotient (usually assumed to be 0.8).

Outside of healthcare, this equation is relevant to various fields, such as physiology research, diving science, and aviation, where understanding oxygen levels and pressures are crucial.

A real-life example could be a scuba diver planning a dive. Using the Alveolar Gas Equation, they can predict the partial pressure of oxygen at a particular depth, enabling them to avoid oxygen toxicity.

Dr. John Severinghaus is a key individual in this field, who developed the first blood gas analyzer and extensively researched arterial blood gases, improving our understanding of the relationship between alveolar gases and arterial blood gases.

Health Calculators

You may also find the following Health Calculators useful.

Use of the Health and Medical Calculators

Please note that the Alveolar Gas Equation Calculator is provided for your personal use and designed to provide information and information relating to the calculations only. The Alveolar Gas Equation Calculator should not be used for you to self-diagnose conditions, self-medicate or alter any existing medication that you are currently prescribed by your Doctor. If the Alveolar Gas Equation Calculator produces a calculation which causes you concern, please consult your Doctor for support, advice and further information.