Normal






Small bowel obstruction






Large bowel obstruction (Cecal volvulus; black arrows).






Free intra-abdominal air below the diaphragm.






Body-packing with multiple foreign bodies ("balls" of hashish).






Button battery in stomach.






Gallstones (not sensitive)






Toxic megacolon






Rectal foreign body
Normal
Small bowel obstruction
Large bowel obstruction (Cecal volvulus; black arrows).
Free intra-abdominal air below the diaphragm.
Body-packing with multiple foreign bodies ("balls" of hashish).
Button battery in stomach.
Gallstones (not sensitive)
Toxic megacolon
Rectal foreign body
Air in colon or rectum makes complete obstruction less likely (esp if symptoms >24hr)<unk>  x-ray has poor Sn and Sp for SBO
If concerned need CT
If concerned need CT
Acute abdominal series
FAST exam
Diagnostic peritoneal lavage
Ultrasound: Abdomen
EFAST exam
Gastric lavage
Theraputic peritoneal lavage
Anoscopy