Impact of age, submersion time and water temperature on outcome in near-drowning.

Abstract

Because children have less subcutaneous fat, and a higher surface area to body weight ratio than adults, it has been suggested that children cool more rapidly during submersion, and therefore have a better outcome following near-drowning incidents. To study the impact of age, submersion time, water temperature and rectal temperature in the emergency room on outcome in near-drowning. This retrospective study included all near-drowning victims admitted to the intensive care units of Helsinki University Central Hospital after successful cardiopulmonary resuscitation between 1985 and 1997. There were 61 near-drowning victims (age range: 0.5-60 years, median 29 years). Males were in the majority (40), and 26 were children (<16 years). The median water temperature was 17 degrees C (range: 0-33 degrees C). The median submersion time for the 43 survivors (70%) was 10 min (range: 1-38 min). Intact survivors and those with mild neurological disability (n=26, 43%) had a median submersion time of 5 min (range: 1-21 min). In non-survivors the median submersion time was 16 min (range: 2-75 min). Submersion time was the only independent predictor of survival in linear regression analysis (P<0.01). Patient age, water temperature and rectal temperature in the emergency room were not significant predictors of survival. Although submersion time is usually an estimate, it is the best prognostic factor after a near drowning incident. Children did not have a better outcome than adults.