What is the primary purpose of a metronome during CPR practice?

The primary purpose of a metronome during CPR practice is to provide a rhythm for chest compressions. This rhythm is crucial because effective chest compressions should be performed at a consistent rate, which is typically between 100 to 120 compressions per minute. A metronome helps instructors and students maintain this optimal pace, ensuring that compressions are delivered effectively. By keeping a steady rhythm, the quality of chest compressions improves, enhancing blood flow to vital organs and increasing the chances of survival for a patient experiencing cardiac arrest. The metronome aids in developing muscle memory for this rate, which can be especially beneficial during real-life emergency situations when adrenaline might interfere with maintaining an appropriate compression rate.