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Related Experiment Videos

The 2005 compression-ventilation ratio in practice: cycles or time?

Jerry P Nolan1, Jasmeet Soar, Peter J F Baskett

  • 1Anaesthesia and Intensive Care Medicine, Royal United Hospital, Combe Park Bath BA1 3NG, UK. jerry.nolan@ruh-bath.sweet.nhs.uk

Resuscitation
|September 2, 2006
PubMed
Summary

Completing five cycles of cardiopulmonary resuscitation (CPR) with a 30:2 compression-ventilation ratio takes trained rescuers about 1 minute and 45 seconds. Many found counting cycles difficult, suggesting time-based CPR training may be more effective.

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Area of Science:

  • Emergency Medicine
  • Cardiopulmonary Resuscitation Research

Background:

  • Basic Life Support (BLS) protocols guide immediate interventions for cardiac arrest.
  • The compression-ventilation (CV) ratio is a critical component of effective CPR.
  • Standardizing CPR delivery times and cycle counts is essential for consistent rescuer performance.

Purpose of the Study:

  • To quantify the time required for trained rescuers to complete five cycles of CPR.
  • To assess the feasibility of using a 30:2 CV ratio in a simulated resuscitation scenario.
  • To identify challenges faced by rescuers when adhering to a specific cycle count during CPR.

Main Methods:

  • Twenty trained BLS providers performed five cycles of CPR on a manikin.
  • A 30:2 compression-ventilation ratio was used.

Related Experiment Videos

  • Time to deliver initial breaths and complete all cycles was recorded.

    • Main Results:

    • The median time to deliver the first two breaths was 7.3 seconds.
    • The median time to complete five CPR cycles was 105.0 seconds (1 minute 45 seconds).
    • A significant number of participants struggled with accurately counting five cycles using the 30:2 ratio.

    Conclusions:

    • Five cycles of CPR with a 30:2 CV ratio take approximately 1 minute 45 seconds.
    • Trained rescuers experience difficulty in accurately counting CPR cycles with this ratio.
    • Consideration should be given to training rescuers based on a fixed time (e.g., 2 minutes) rather than a specific number of cycles.