X-ray
Frontal
NG tube is noted in position.
The stomach and proximal duodenum are dilated and gas-filled showing double bubble sign suggestive of duodenal obstruction. No bowel gas is seen beyond the proximal duodenum.
The differential diagnosis includes all causes of duodenal obstruction whether related to intrinsic or extrinsic etiologies.
Barium upper GI study is indicated for further evaluation.