If we have to decompress a tension pneumothorax with a cannula, we must ensure we use one that is the correct length.  

Check out this video from Dr Larry Mellick MD – https://www.youtube.com/watch?v=hiax6H5zUcs

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This podcast is intended to assist in ongoing medical education and peer discussion for qualified health professionals.  Please ensure you work within your scope of practice at all times.  For personal medical advice always consult your usual doctor