Learn the basic principles of a FAST scan in just 4 minutes. A FAST (Focused Assessment with Sonography for Trauma) scan is used in the emergency setting for the identification of free fluid, which is presumed to be blood in trauma. Visit our website: https://www.radiologynation.com Follow us on Twitter: https://www.twitter.com/radiologynation Follow us on Instagram: https://www.instagram.com/radiology.nation Like us on Facebook: https://www.facebook.com/radiologynation Follow our co-founder on Twitter: https://www.twitter.com/nanapragasam Right upper quadrant free fluid: Case courtesy of Brian Buchanan MD FRCPC, ABaCCUS program, Dept. Critical Care Medicine, University of Alberta. Twitter: @UAlberta_CCUS & @Buchanan_MD. Left upper quadrant free fluid: Case courtesy of Dr. Paul Adamoli, http://radiopaedia.org. From the case https://radiopaedia.org/cases/haemoperitoneum Pericardial effusion: Case courtesy of Brian Buchanan MD FRCPC, ABaCCUS program, Dept. Critical Care Medicine, University of Alberta. Twitter: @UAlberta_CCUS & @Buchanan_MD. Pelvic free fluid: Case courtesy of Brian Buchanan MD FRCPC, ABaCCUS program, Dept. Critical Care Medicine, University of Alberta. Twitter: @UAlberta_CCUS & @Buchanan_MD. Radiology Nation is solely for educational purposes. The video tutorials are designed to support qualified healthcare professionals and are not intended to replace current accepted training models.