Overview of oxygen connector types

Contributors: Michael Lipnick, MD

Date last updated: Aug 07, 2022

Thorpe flowmeter configurations

Thorpe tube flowmeter with (a) pressure regulator and outlet connector (e.g. DISS) (male). Connector (DISS or other convention) can be connected to (b) a barbed “Christmas tree” connector for oxygen tubing or (c) a humidifier bottle. Also shown is (d) an example of a dual flowmeter from a single wall source for use with two patients.
Source: WHO-UNICEF technical specifications and guidance for oxygen therapy devices. Geneva: World Health Organization and the United Nations Children’s Fund (UNICEF), 2019 (WHO medical device technical series). License: CC BY-NC-SA 3.0 IGO.

How to read a Thorpe tube flowmeter with ball or bobbin mechanism (4 LPM)

A ball float style flowmeter is read from the center of the ball (a), whereas a bobbin style flowmeter is read from the top of the bobbin (b). In the illustration above, both flowmeters depict 4 LPM.
Source: WHO-UNICEF technical specifications and guidance for oxygen therapy devices. Geneva: World Health Organization and the United Nations Children’s Fund (UNICEF), 2019 (WHO medical device technical series). License: CC BY-NC-SA 3.0 IGO.

Barbed oxygen connector ('Christmas tree' adapter)

Source: The Open Critical Care Project, Creative Commons SA, Attribution, NC v4.0. Download this and other free images in the OCC Image Library.

Examples of smooth bore oxygen tubing

Flow splitting via flowmeter station and y-splitters

Source: The Open Critical Care Project, Creative Commons SA, Attribution, NC v4.0. Download this and other free images in the OCC Image Library.

Improvised oxygen delivery setups

Source: Robert Neighbour

Summary of high pressure oxygen hose and terminal connectors around the world

Click to download the entire visual of all oxygen connector type.

High pressure oxygen hose and terminal connector types

High pressure reinforced oxygen hose

Source: The Open Critical Care Project, Creative Commons SA, Attribution, NC v4.0. Download this and other free images in the OCC Image Library.

Oxygen ecosystem: from source to bedside

Source: The Open Critical Care Project, Creative Commons SA, Attribution, NC v4.0. Download this and other free images in the OCC Image Library.

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