Video 7 - Delayed clearing time.
From the following article
W.G. Paterson, Raj K. Goyal and Fortunée Irene Habib
GI Motility online (2006)
doi:10.1038/gimo20
Esophageal clearing time in normal volunteers is about 13 seconds. If barium bolus is retained more than 20 seconds, clearing time is considered delayed.
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