Which tool provides real-time coaching for CPR performance?

• A. A defibrillator with alarm
• B. A pulse oximeter
• C. A CPR feedback device that provides cadence, depth, and pause guidance.
• D. An ECG monitor

Answer: (C)

Real-time coaching during CPR comes from a device that actively guides the rescuer as compressions are performed. A CPR feedback device provides cadence (rate), depth, and pause guidance, using sensors to measure how fast and how deeply you push and when you pause. It then delivers immediate prompts or visual/auditory feedback to keep chest compressions within guideline targets—about 100–120 compressions per minute and a depth around 5 cm for adults—while minimizing interruptions. This direct, ongoing guidance is what helps improve CPR quality in real time.

Other tools have different roles. A defibrillator with alarm mainly detects rhythm and delivers shocks when indicated, not continuous coaching on compression quality. A pulse oximeter measures oxygen saturation and perfusion but does not guide the mechanics of CPR. An ECG monitor shows the heart’s electrical activity, again without coaching CPR performance.