DPT-772: PFTS LECTURE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS

DPT-772: PFTS LECTURE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS PFTs are used from a diagnostic and plan of care standpoint PFTs provide information about integrity of the airways or airway structure function of respiratory musculature or ventilatory pump process condition of lung tissue A thorough evaluation with PFTs includes measure of lung volume and capacities gas flow rates gas diffusion gas distribution There are 3 pulmonary classifications. What are they? obstructive restrictive combined/mixed Individuals with obstructive pulmonary diseases have trouble getting air out Individuals with restrictive pulmonary diseases have trouble getting air in Individuals with combined or mixed pulmonary diseases have trouble with a little bit of both Spirometry Technique maximal inhalation followed by maximal exhalation, measuring volume of air and time Spirometry Data Obtained FVC, FEV1, FEV1/FVC, VC Diffusing Capacity of the Lung for CO Technique Inhalation of fixed concentration of CO and helium, breath holding for 10 sec, then expiration with measurement of end-tidal CO and helium Diffusing Capacity of the Lung for CO or DLCO looks at the ability for the transfer of carbon monoxide, specifically the ability of the lung to transfer gas from the inhaled air to the red blood cells Why do we look at CO? has 210 times more affinity to bind than oxygen Diffusing Capacity of the Lung for CO Data Obtained Uptake and diffusing capacity of CO Why might a clinician opt for DLCO rather than spirometry? Can be easier on the patient because you are inhaling a breath, holding for ten seconds, then exhaling rather than the maximal inhale and exhale which can be more uncomfortable for patients with pulmonary diseases Helium Lung Volumes Technique