Indications. “Acute Abdomen” Abdominal Pain. ?Obstruction. Not Indicated for: –Trauma. –Solid organ assessment.
Basic Principles Five radiographic densities: –Gas/Air –Fat. –Soft Tissue/Water –Bone/Calcium –Metals Interface/line only visible when two of these densities interface with each other.
Approach to a AXR Technical Assessment. Projection. Bowel/Gas Shadows. Normal/Abnormal Calcifications. Solid Organs. Look at lung bases and at the skeleton.
Normal Vs Abnormal Gas shadows Stomach. Colon. Small Bowel. Within the Lumen: –Dilated bowel ?Obstruction Outside the Lumen: –Free ?perforation –In a cavity ?abscess
Contrast Medium for GI Water Soluble Ionic (gastrografin) Can lead to pulmonary edema if aspirated. Non- Ionic ( Low Osmolar) Relatively safer if aspirated. Gadolinium (MRI) Barium ( Non-water soluble) Can cause sever peritonitis and fibrosis in perforation or leakage.