Basic Life Support (BLS) Practice Exam

What methods can be used to evaluate the quality of CPR being administered?

1. Visual observation only

2. Capnography only

3. Feedback devices only

4. Visual observation, capnography, and feedback devices

The correct answer is: Visual observation, capnography, and feedback devices

Using a combination of visual observation, capnography, and feedback devices provides a comprehensive evaluation of the quality of CPR being administered. Visual observation allows rescuers to assess the overall technique during CPR, including hand placement, compression depth, and rate. This method gives immediate feedback on the rescuer's performance and can help ensure that guidelines for effective chest compressions are followed. Capnography measures the concentration of carbon dioxide in exhaled air, providing real-time information about the adequacy of chest compressions and the effectiveness of ventilation. Monitoring end-tidal CO2 levels can indicate if compressions are generating adequate blood flow to the lungs — a higher level usually signifies better perfusion. Feedback devices are tools that provide data and auditory or visual prompts on the chest compressions being delivered. They can help ensure that compressions are of adequate depth and rate, leading to optimal circulation and improving patient outcomes. By combining these methods, healthcare providers can ensure that CPR is performed effectively, enhancing the chance of survival for patients in cardiac arrest. Each method has its strengths and collectively they provide a more accurate and thorough assessment of CPR quality than relying on any single method.