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O2 Encyclopedia

Everything you want to know about oxygen supply and respiratory care in this open-access, living document that includes original content from OCC and curated content from WHO, UNICEF and other O2 authorities.

O2 FAQ

Up to date, expert answers to frequently asked questions about O2 supply systems, respiratory care and pulse oximetry written by OCC & collaborators.

Resource Library

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COVID-19 Resources

We have compiled and created open access, peer-reviewed COVID19 content with relevance to resource-variable settings

COVID-19 Guidelines Dashboard

This resource compiles COVID19 guidelines from leading global authorities and consolidates them into a single recommendation based on concordance.

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Job Aid Builder

Use the tool below to create your own customized and personally branded educational job aids on a wide range of topics.

O2 Calculator

Use this tool to estimate oxygen supply, demand, cylinder size and duration and much more at the facility or national level.

Oxygen FAQ

Up to date, expert answers to frequently asked questions (FAQ) about oxygen supply systems, respiratory care and pulse oximetry written by OCC & collaborators.

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Invasive mechanical ventilation

What are the noteworthy differences between transport ventilators and non-transport ventilators?

    • When connected to a high pressure oxygen supply transport ventilators can deliver the FiO2, minute ventilation and pressures required to take care of most critically ill patients.
    • Transport ventilators are durable and designed for use in harsh environments
    • Transport ventilators usually have a turbine or compressor so that they can operate without a high pressure source of medical air. Most non-transport ventilators do not. When connected to a low pressure oxygen supply (such as an oxygen concentrator), transport ventilators may not be able to deliver the FiO2 required to take care of many critically ill patients.
    • Transport ventilators are often louder (especially compressor driven vents) than non-transport ventilators. If there are multiple patients in the same room on these vents, special attention may be required for monitoring. 
    • Transport ventilators may have limitations in terms of monitoring and displays  
    • Transport ventilators usually have at least the basic modes necessary for critical care, though may have fewer features for customization than traditional ICU ventilators 
    • Relative to some other non-transport ventilators, transport ventilators may have limited NIV functionality (HFNC, CPAP, BiPAP functions) or may not be as good with asynchronous patients
    • Transport ventilators can run without external power (for short periods of time), and without oxygen supply, or compressed air supply  
    • See these comparison tables of transport ventilators and non-transport ventilators by the ECRI. (Please reference the manufacturers’ manuals as the accuracy of this table is not guaranteed). 

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