We suggest Erect CXR as initial routine diagnostic
assessment in case of acute abdomen from suspected
free perforation of PU.
In case of negative AXR and/or erect CXR, we suggest
CT scan as second level diagnostic tool since its higher
sensitivity in detecting intra-abdominal free air.
In case of negative findings of free intra-abdominal
air and persistent suspicion of PPU, we sug