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Classical point-of-care ultrasound findings of free intraperitoneal air. An enhanced peritoneal stripe sign (arrow heads) is a white increased echogenicity stripe located under the abdominal wall fascia in the supine position which does not move with respiration. The reverberation artifact consists of hyperechogenic parallel lines with equal distance between them (arrows). (Point-of-care ultrasound study was performed by Professor Fikri Abu-Zidan)
