The proportion of time spent performing chest compressions during cardiopulmonary resuscitation (CPR) significantly impacts patient survival. This metric, often expressed as a percentage, reflects the active pumping phase of CPR relative to the total resuscitation time. Higher values correlate with improved circulation and oxygen delivery to vital organs, thereby enhancing the likelihood of a positive outcome. For example, if compressions are administered for 45 seconds out of every minute of CPR, the value is 75%.
Maintaining an adequate value is crucial because interruptions to chest compressions lead to decreased blood flow and oxygen delivery. This reduction can rapidly compromise the viability of the brain and heart. Historically, inconsistent application of CPR guidelines contributed to variable results. However, contemporary resuscitation protocols emphasize minimizing interruptions and maximizing the hands-on time, recognizing the direct link between this parameter and patient prognosis.
