A derivation then validation study on adults with blunt torso trauma found the absence of the following factors to be associated with a very low risk of significant (intervention-requiring) abdominal pathology and such patients were unlikely to benefit from abdominal CT scanning:
- GCS score less than 14
- costal margin tenderness
- abdominal tenderness
- femur fracture
- hematuria level greater than or equal to 25 red blood cells/high powered field
- hematocrit level less than 30%
- abnormal chest radiograph result (pneumothorax or rib fracture)
Clinical Prediction Rules for Identifying Adults at Very Low Risk for Intra-abdominal Injuries After Blunt Trauma
Ann Emerg Med. 2009 Oct;54(4):575-8