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. 2017 Winter;53(1):7-11.
Epub 2017 Feb 1.

Debunking myths in pulmonary function testing

Jeffrey M Haynes  1
Affiliations

Debunking myths in pulmonary function testing

Jeffrey M Haynes. Can J Respir Ther. 2017 Winter.
No abstract available

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Figures

FIGURE 1
FIGURE 1. The percentage of quality spirometry tests from two clinical laboratories. Baseline data from 2004 is compared to 2008 after lab #1 instituted an on-going technologist performance monitoring and feedback program. Figure produced with data from Borg et al [4].
FIGURE 2
FIGURE 2. The percent of predicted lower limit of normal as a function of age in males and females. The red horizontal dashed line represents 80% of predicted. LLN, lower limit of normal; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity. From Quanjer et al [22] (open access material under CC-BY-NC license).
FIGURE 3
FIGURE 3. sGaw and FEV1 in a symptomatic patient during a MCT. (A) Baseline testing before methcholine challenge test (MCT). (B) Post MCT. (C) Post BD administration. sGaw, specific airway conductance; FEV1. forced expiratory volume in 1 second; MCT, methacholine challenge test; BD, bronchodilator). From Haynes [35] with permission.
FIGURE 4
FIGURE 4. Change in sGaw versus FEV1 in patients undergoing MCT. The red square includes subjects with a >50% reduction in sGaw with a <20% reduction in FEV1. The black line is the linear regression line. sGaw, specific airway conductance; FEV1, forced expiratory volume in 1 second; MCT, methacholine challenge test. From Khalid et al [36] with permission.
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