Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Breathing parameters of representative breathing profiles for COPD patients at rest, doing light exercise, and while asleep
| Rest | Exercise | Sleep | |
|---|---|---|---|
| Tidal volume, VT (mL) | 640 | 800 | 520 |
| Inspiratory time, TI (s) | 1.20 | 0.96 | 1.79 |
| Expiratory time, TE (s) | 2.33 | 1.77 | 2.93 |
| Breathing frequency, f (breaths/min) | 17 | 22 | 13 |
Abbreviation: COPD, chronic obstructive pulmonary disease.
