Friday, May 2, 2014

Association of water temperature and submersion duration and drowning outcome


Association of water temperature and submersion duration and drowning outcome

Authors: Quan L, Mack CD, Schiff MA
Journal: Resuscitation, March 2014
  • Study Design
    • Database of drowning victims from 3 counties in Washington state, 1975-11996
    • Case Control study
      • Case: victims with good outcome (survived with no, mild, or moderate neuro sequelae)
      • Control: victims with bad outcome (died or with severe neuro sequelae)
    • Location correlated with water temperature
      • Pond, bath-tubs, pools excluded
    • Used best estimated submersion times
    • Goal: evaluate effects of submersion duration and water temperature on outcome
  • Results
    • 1377 victims identified
    • Correlations with good outcomes
      • younger (< 15)
      • female
      • submersion time < 6 min in water > 16 C
    • Majority of good outcomes submerged < 6 min
    • No significant correlation between water temp and survival
    • CPR
      • Bystander: 50% good outcomes vs 21% bad outcomes
      • EMS: 10% good outcomes vs 27% bas outcomes
  •  Take Home Points
    • Duration of submersion was the only factor that correlated well with outcome, a findings we have seen time and time again in various studies.  Drowning is a hypoxic injury, and time is brain.
Reference:
Quan L, Mack CD, Schiff MA. Association of water temperature and submersionduration and drowning outcome. Resuscitation. 2014 Mar 4. pii:S0300-9572(14)00114-2.

1 comment:

  1. Core temperature is a very important issue,by the way. Both quality portable wind meters and cabled stations can be useful to measure these temperature efficiently and accurately.

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