• Emerg Med Australas · Oct 2011

    Case Reports

    Shifting Gas Artefact Sign: Early sonographic detection of pneumoperitoneum.

    • Paul Gee.
    • Emergency Department, Christchurch Hospital, Christchurch, New Zealand. paul.gee@cdhb.govt.nz
    • Emerg Med Australas. 2011 Oct 1;23(5):647-50.

    AbstractThis case report describes the use of ultrasound to diagnose pneumoperitoneum in an unstable patient with abdominal pain. Gas in peritoneum produces a specific sonographic appearance. The use of dynamic manoeuvres improves confidence in the ultrasound diagnosis of free gas. The Shifting Gas Artefact Sign is explained. The literature on sonographic detection of pneumoperitoneum is reviewed. The detection of pneumoperitoneum is a significant finding in non-traumatic abdominal pain and also in blunt abdominal trauma. In both settings more research is required to validate the utility of the test in the acute setting.© 2011 The Author. EMA © 2011 Australasian College for Emergency Medicine and Australasian Society for Emergency Medicine.

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