Laboratory Data

1. CBC. Low hemoglobin and hematocrit should raise concerns about significant blood loss with severe injury such as intraabdominal trauma. In children with excessive bruising, screen for leukemia and thrombocytopenia.

2. Coagulation studies. Platelet count, PT, and PTT can serve as a minimal screen for coagulopathies in children presenting with bruises.

3. Liver function tests, pancreatic enzymes. Elevated liver function tests or elevated amylase and lipase may indicate blunt abdominal trauma. When enzyme levels are elevated, consider abdominal CT scan.

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