During which phase of a capnogram does inhalation occur?
A) Phase 1
B) Phase 2
C) Phase 3
D) Phase 4

Question

Quizplus · Accepted Answer

During inhalation the capnogram will have a zero reading because there is no exhalation of carbon dioxide (CO₂).As soon as the exhalation phase begins there is rise of the waveform.In phase 1,the initial gas exhaled is from the conducting airways,which contain low levels of CO₂ from inspired air.During phase 2,alveolar gas containing CO₂ mixes with gas from the anatomical airways and the CO₂ concentration rises.In phase 3,the curve plateaus as alveolar gas is exhaled.In phase 4,the concentration falls to zero because inspiration is occurring.

During Which Phase of a Capnogram Does Inhalation Occur