Which trio of monitors must be displayed concurrently on the monitor for patients under observation?

• A. Blood pressure, heart rate, and temperature.
• B. ECG waveform, heart rate, and SpO2.
• C. Continuous ECG waveform, SpO2, and ETCO2 waveform.
• D. SpO2, ETCO2, and blood glucose.

Answer: (C)

In patient observation, you want to track the most immediate threats to life at a glance: heart rhythm, oxygenation, and ventilation. The best trio to display together is the continuous ECG waveform, SpO2, and ETCO2 waveform. The ECG provides real-time insight into the heart’s electrical activity and detects arrhythmias or ischemia. SpO2 shows how well blood is being oxygenated, signaling hypoxemia early. ETCO2 waveform, from capnography, reveals ventilation status and airway issues—helping you spot problems like hypoventilation, hyperventilation, or obstruction right away. Together, these three give a comprehensive, at-a-glance view of cardiac, oxygenation, and ventilation status, which is essential for patients under observation.

The other options miss one of these critical elements. One set lacks a ventilation parameter, focusing only on some vital signs without a ventilation waveform. Another omits ETCO2, removing direct ventilation monitoring. Others miss the cardiac rhythm component or substitute a non-continuous value like glucose, which isn’t part of the standard concurrent monitoring at a glance.