During CPR, chest compression fraction (CCF) should be at least ___% and ideally greater than ____%.

During CPR, chest compression fraction (CCF) should be at least ___% and ideally greater than ____%.

• A. 40% and 60%
• B. 50% and 70%
• C. 60% and 80%
• D. 70% and 90%

Answer: (C)

During CPR, keeping chest compressions flowing with as few interruptions as possible is essential because continuous compressions help maintain coronary and cerebral perfusion pressures. Chest compression fraction (CCF) is the portion of CPR time that compressions are being delivered. The goal is to maximize this fraction because even brief pauses can cause a drop in perfusion, making return of spontaneous circulation less likely. The guidelines set a minimum target of keeping CCF at least 60%, with a stronger goal of greater than 80% when possible. Achieving a higher CCF involves planning to minimize interruptions, such as defibrillating with ongoing compressions when feasible, coordinating breaths so they don’t pause compressions, and having responders ready to switch compressors smoothly. If the CCF falls below 60%, perfusion drops and survival chances decline; aiming closer to or above 80% provides the best chance for ROSC and favorable outcomes.

During CPR, keeping chest compressions flowing with as few interruptions as possible is essential because continuous compressions help maintain coronary and cerebral perfusion pressures. Chest compression fraction (CCF) is the portion of CPR time that compressions are being delivered. The goal is to maximize this fraction because even brief pauses can cause a drop in perfusion, making return of spontaneous circulation less likely.

The guidelines set a minimum target of keeping CCF at least 60%, with a stronger goal of greater than 80% when possible. Achieving a higher CCF involves planning to minimize interruptions, such as defibrillating with ongoing compressions when feasible, coordinating breaths so they don’t pause compressions, and having responders ready to switch compressors smoothly. If the CCF falls below 60%, perfusion drops and survival chances decline; aiming closer to or above 80% provides the best chance for ROSC and favorable outcomes.