PFT Pulmonary function tests (100% Errorless Answers)

What are the indications of PFT? correct answers -evaluate symptoms and signs of lung disease -assess progression of lung disease -monitor effectiveness of therapy -evaluate preoperative patients to confirm tolerance of anesthesia -to screen people at risk for pulmonary disease -to monitor for potentially toxic effects of certain drugs or chemicals like chemotherapy -screen smokers and people exposed to toxic substances -monitor beryllium and amiodorone what are the limitations of PFT? correct answers NOT DIAGNOSTIC! -must be in context of history, PE and other tests -not indicated in absence of symptom -can be confusing -it's a sensitive test, not a specific test -can be used to identify the pattern and severity of a physiologic abnormality-not indicated unless exposed (ex: in CHF and other non-pulmonary diseases that affect the pulmonary system). what is tidal volume? correct answers breathing normally what is inspiratory capacity? correct answers entire capacity lungs can hold what is FEV1? correct answers breathe out as hard as you can in 1 second. what is forced vital capacity? correct answers complete max amount lung holds that you can breathe all the way out. it includes the expiratory reserve volume -(big breath in, then out as long and hard as possible - amount exhaled) what is residual volume? correct answers air staying in lungs that you can't get all the way out what is total lung capacity? correct answers max air in / out and residual what are the components of spirometry? correct answers how much air can be inhaled and exhaled how fast can't measure residual volume or total lung capacity. BIG THREE COMPONENTS: -FVC -FEV1 -FEV1/FVC ratio