Minor Head Trauma in Children Younger Than 3 Months and Clinical Predictors of Clinically Important Traumatic Brain Injuries.

Objectives: Major studies have defined clinical rules to regulate the use of computed tomography in children after head trauma. Infants younger than 3 months are considered at higher risk of brain injuries than older children and at the same time at higher risk of radiation-induced damage. Hence, it would be desirable to have clinical decision rules more adapted to this subset of patients. The objectives of this study are to compare the rate of brain injuries in children younger than 3 months or 3 to 24 months and to assess predictors of clinically important traumatic brain injuries (ciTBIs) (the ones causing death, neurosurgical intervention, long intubation, or hospitalization for 2 days or more) in the former group.

Methods: Records of children younger than 24 months evaluated in a single emergency department for minor head trauma during a 3 years period were retrospectively reviewed. The rates of brain injuries were compared in children younger or older than 3 months. Variables associated with severe lesions were assessed in younger children.

Results: The study included 744 patients, 86 (11.6%) aged 0 to 90 days and 658 (88.4%) aged 91 to 730 days. Within the young group, we found higher rates of traumatic brain injuries (14.0% vs 4.1%, P = 0.0008) and ciTBI (8.1% vs 1.5%, P = 0.002) compared with the old group. A significant correlation with ciTBI in the young group was observed for heart rate (odds ratio [OR], 12.3; 95% confidence interval [CI], 2.4-62.4), nonfrontal scalp hematoma (OR, 9.2; 95% CI, 1.8-46.1), severe mechanism (OR, 5.6; 95% CI, 1.1-27.6), presence of hematoma (OR, 6.1; 95% CI, 1.2-30.0), hematoma size >3 cm (OR, 23.8; 95% CI, 4.2-135.6), and hematoma location (OR, 9.2; 95% CI, 1.8-46.1).

Conclusions: Children younger than 3 months presenting after minor head trauma constitute a relevant population. Available clinical predictors well correlate with ciTBIs in this age group.