− | Abdominal ultrasound reveals a distended large colon with thickened, oedematous walls. [[Colic Diagnosis - Abdominocentesis|Peritoneal fluid should be sampled]] under ultrasound guidance, typical changes include an increase in protein and cellular content. | + | Abdominal ultrasound reveals a distended large colon with thickened, oedematous walls. [[Colic - Peritoneal Fluid Analysis|Peritoneal fluid should be sampled]] under ultrasound guidance, typical changes include an increase in protein and cellular content. |