O'Connor SC, et al. - This retrospective chart review strived to ascertain if the more liberal use of angioembolization increases the success rate of nonoperative management (NOM) of blunt splenic injury in adolescents. In high-grade injuries, failure of NOM was rare; as a result, the number required to treat with prophylactic angioembolization would be around 37 patients, resulting in undue risk to many patients with no therapeutic benefit. There was no improvement in failure rate with aggressive angioembolization, though a larger sample size was needed to rule out type 2 error.