A patient will undergo bronchial provocation testing with methacholine chloride (Provocholine). Baseline spirometry reve
Posted: Mon Aug 08, 2022 3:53 pm
A patient will undergo bronchial provocation testing with methacholine chloride (Provocholine). Baseline spirometry reveals the FVC is 4.00 L and FEV1 is 3.00 L.The provocative dose 20% (PD20) can be calculated when which of the following measurements occur?
A. The FVC falls below 3.20 L, or the FEV1 falls below 2.40 L.
B. The FEV, falls below 2.40 L, regardless of change in FVC.
C. The FVC falls below 3.20 L and the FEV1 falls below 2.40 L.
D. The ratio FEV1/FVC falls below 0.8.
A. The FVC falls below 3.20 L, or the FEV1 falls below 2.40 L.
B. The FEV, falls below 2.40 L, regardless of change in FVC.
C. The FVC falls below 3.20 L and the FEV1 falls below 2.40 L.
D. The ratio FEV1/FVC falls below 0.8.