In the lung volume trace below, which labelled compartment represents the Residual Volume (RV)?

To accurately identify which labeled compartment represents the Residual Volume (RV) in a lung volume trace, I would need to see the specific image or diagram you're referring to. However, I can provide guidance on how to recognize Residual Volume in a lung volume chart.

Explanation of Residual Volume (RV)

Residual Volume (RV) is the amount of air that remains in the lungs after a maximal exhalation. It cannot be measured directly with a spirometer since it represents air that is always present in the lungs, preventing their collapse.

General Identification Tips

1. Check the Breathing Cycle: RV is not directly involved in the tidal volume or the exhaled volumes during normal breathing cycles.
2. Review the Labels: Look for labels that indicate regions below the total lung capacity or after the expiratory reserve volume.
3. Understand Lung Categories: RV is typically shown as a smaller compartment compared to other volumes in a lung volume chart or a spirogram.

If you can provide the lung volume trace or further contextual details, I'd be happy to help identify the specific compartment representing RV.