We recently reviewed a Pediatric fluid calculator app, Rx Pediatric Dehydration. Our physician editor, Dr. Doug Maurer, came away impressed. The same team has now launched another medical app, called Alveolar Gas Tutor app — that helps with ventilator management and critical care medicine.

This medical app focuses on simulating the relationship between respiratory variables and their impact on alveolar ventilation and blood gasses. The respiratory variables include respiratory rate, tidal volume, dead space and fraction inspired oxygen (FiO2). The app allows users to see how partial pressure of oxygen and carbon dioxide are affected depending on changes in respiratory variables.

There are two ways Alveolar Gas Tutor can be used, and there are detailed instructions provided with the app. The first involves users entering values for respiratory rate, tidal volume, dead space and FiO2 and watching the corresponding changes to the partial pressure of oxygen (PAO2) and carbon dioxide (PACO2). For the second method, users enter the AaDO2 value and look at the changes that occur to the partial pressure of oxygen and carbon dioxide at the arterial level. This medical app is designed to be user-friendly and clearly displays the content.

Alveolar Gas Tutor demonstrates how respiratory variables affect alveolar ventilation and blood gases. Users can play around with the different variables to better understand the relationships. For example as the dead space increases PACO2 and PaCO2 decrease but as FiO2 increases, PSCO2 and PaCO2 also increase. The app is based on literature and formulas readily available in the medical community.

Alveolar Gas Tutor is based on the Alveolar Gas Equation, and could make calculations quicker and easier whether it is in the classroom, the emergency room or ICU.

This medical app could be utilized with a ventilator management app, such as the Ventilator App.

Alveolar Gas Tutor

Alveolar Gas Tutor
By Persistent Systems Limited

Price: Free

iPhone, iPad: iTunes
Android: Google Play