How is Chest Compression Fraction (CCF) defined?

How is Chest Compression Fraction (CCF) defined?

• A. Actual chest compression time / total code time
• B. Number of chest compressions per minute
• C. Ratio of breaths to compressions
• D. Time to first defibrillation

Answer: (A)

Chest Compression Fraction measures how much of the resuscitation time chest compressions are actually being delivered. It is defined as the actual chest compression time divided by the total code time, and it can be expressed as a fraction or percentage. This matters because more continuous compressions mean better blood flow to the heart and brain during CPR, which is linked to better outcomes. For example, if compressions are performed for 150 seconds of a 200-second resuscitation, the CCF is 0.75 or 75%. The other options describe different ideas: the number of compressions per minute is the compression rate; the ratio of breaths to compressions is the ventilation–compression ratio; time to first defibrillation is about how quickly a shock is delivered.

Chest Compression Fraction measures how much of the resuscitation time chest compressions are actually being delivered. It is defined as the actual chest compression time divided by the total code time, and it can be expressed as a fraction or percentage. This matters because more continuous compressions mean better blood flow to the heart and brain during CPR, which is linked to better outcomes. For example, if compressions are performed for 150 seconds of a 200-second resuscitation, the CCF is 0.75 or 75%. The other options describe different ideas: the number of compressions per minute is the compression rate; the ratio of breaths to compressions is the ventilation–compression ratio; time to first defibrillation is about how quickly a shock is delivered.