What does capnography provide in non-intubated patients?

What does capnography provide in non-intubated patients?

• A. It measures heart rate.
• B. It provides continuous feedback on alveolar ventilation and can detect airway obstruction or poor ventilation during spontaneous breathing.
• C. It measures only oxygen saturation.
• D. It displays venous CO2 levels.

Answer: (B)

Capnography in non-intubated patients gives real-time information about ventilation by measuring exhaled CO2. It provides continuous feedback on alveolar ventilation through the end-tidal CO2 value and the capnography waveform, so you can see how well the patient is exchanging air during spontaneous breathing. This makes it possible to detect airway obstruction or poor ventilation early, even if oxygen saturation looks okay. It’s about monitoring how well CO2 is being eliminated, not about heart rate or venous CO2, and it offers more immediate insight into ventilation than oxygen saturation alone.

Capnography in non-intubated patients gives real-time information about ventilation by measuring exhaled CO2. It provides continuous feedback on alveolar ventilation through the end-tidal CO2 value and the capnography waveform, so you can see how well the patient is exchanging air during spontaneous breathing. This makes it possible to detect airway obstruction or poor ventilation early, even if oxygen saturation looks okay. It’s about monitoring how well CO2 is being eliminated, not about heart rate or venous CO2, and it offers more immediate insight into ventilation than oxygen saturation alone.