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.
Effects of time and resistance on the change in expiratory volume. Rates of changes of volume after a similar given change of alveolar pressure in a subject with normal respiratory system resistance (—) and a resistance 3 times greater (---) such as in COPD, assuming a constant compliance. Note the marked effect of resistance on the volume change, particularly when the available time is shortened.
Abbreviations: COPD, chronic obstructive pulmonary disease.
