Diagnostic Peritoneal Lavage: Sensitivity and Specificity
These studies evaluated for presence of any abdominal injury and were done in days when many more of these went to surgery than is currently done.
Some series noted up to a 5% complication rate.
Positive results are considered:
10 ml of gross blood, enteric content aspirate, RBC count >100,000/mL, or a WBC count of > 500/mL
94% sensitive, 96% specific