RESUMO
Many indices and scores are used in critical care medicine to aid management and predict risk of mortality. We report 2 cases of submersion injury and discuss the usefulness and application of common respiratory and critical care indices. The respiratory indices help better understand the pulmonary pathophysiology and characterize the severity of lung injury and ventilation/perfusion mismatch. Severe lung injury resolved after ventilation support with appropriate positive end-expiratory pressure in both cases. The 6-year-old girl survived the near-fatal submersion injury intact despite grossly abnormal initial Glasgow Coma Scale (GCS) and high Pediatric Index of Mortality 2 scores, whereas the 5-year-old boy with grossly abnormal GCS and Pediatric Index of Mortality 2 scores died despite resolution of lung injury. These cases illustrate that resuscitation should be promptly instituted at the scene to ensure optimal outcome because initial pulmonology and neurology indices may not reliably predict mortality or intact survival. The GCS score was not initially designed for prognostication. Nevertheless, 2 serial GCS scores of 3, one performed at emergency department and one at the pediatric intensive care unit, were associated with nonsurvival in our second patient.