PFT Final Exam Pulmonary function tests (All Solved)

A 22 year old patient with dyspnea performs three spirometry trials the PFT tech should do which of the following? correct answers Perform at least one more maneuver PFT testing is contraindicated in which of the following conditions? correct answers Untreated pneumothorax An FEV1% is less tha predicted is a good indication for bronchodilator studies. However, FEV1% should not be used to judge bronchodilator response correct answers True Which of the following is the most important measurement for distinguishing an obstructive impairment? correct answers FEV1/VC Measurement of lung volumes (TLC) is indicated correct answers To diagnose restrictive lung disease The reported flow volume loop should come from which trial? correct answers Trial 3 A subject being tested for possible environmental exposure to asbestos produces the following spirometery results correct answers The patient did not make a good effort on the MVV A subject has an FVC of 1.8 L (39% of predicted). The same individual has a slow VC of 2.7 L. Which of the following might explain these findings? correct answers 1. Airway compression in obstructive lung disease 2. Poor effort or early termination of the FVC Only obstruction can cause the FEV1 to be less than predicted correct answers False DLCO is commonly used to monitor drug toxicity correct answers True The following DLCO data (reported in ml CO/min/mmhg) are obtained from a subject. What should technologist do next? correct answers Report the mean of the second and third trials Reversibility of airway obstruction is considered significant for an increase of greater than _____% for either the FEV1 or the FVC correct answers 12% A patient with an FEV1 65% of predicted would be considered what severity of obstruction? correct answers Moderate Restrictive lung disease is characterized by the reduction of lung volumes indicated by the _____ and ____ reduced below the lower limit of normal correct answers TLC and VC Healthy adults without obstruction can expire their FVC within correct answers 4-6 seconds