Respiratory care clinics of North America
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Crape states that in relation to the results of spirometry in the Lung Health Study that perhaps the most important message is that pulmonary function technologists need continuous monitoring and feedback to maintain optimum performance. Technologist education is an essential component of producing valid test results.
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Resistance measurements are the most useful parameters for assessing acute changes in airway caliber associated with bronchodilation or bronchial provocation. Used in addition to spirometry, Raw can provide a better differentiation of the causes of airflow impairment as well as the presence of concurrent processes. A simple, noninvasive Raw measurement can provide definitive answers in the absence of other changes. Finally, the addition of practical, nonplethysmographic measurements opens a new application for bedside, office, and home monitoring.
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The measurement of co uptake (VCO and DLCO) from alveolar gas is a unique way to noninvasively assess pulmonary vascular function, specifically the functional volume of the pulmonary capillary bed. Proper interpretation of results, however, needs to account for inherent assumptions regarding co distribution and timing procedures. Moreover, reasonable airway mechanics, lung volumes, and patient cooperation are required for accurate measurements. Potential clinical utility may be increased if measurements are made in different positions or under exercise conditions.