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Ontario Prehospital Advanced Life Support Studies

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The Ontario Prehospital Advanced Life Support (OPALS) Studies were a series of multi-center before-and-after clinical trials looking at the impact of prehospital advanced life support services. The studies have not found the addition of advanced life support services to increase survival to hospital discharge for cardiac arrest patients.

Cardiac Arrest

  • Phase 1, basic life support with defibrillation, January 1, 1991 to January 31, 1995
  • Phase 2, optimized basic life support, July 1, 1994 to March 31, 1997
  • Phase 3, addition of advanced life support, February 1, 1998 to June 30, 2002

    • References

    Ontario Prehospital Advanced Life Support Studies Wikipedia
    (Text) CC BY-SA