PFT Final Exam| 149 questions| with complete solutions

A 22 year old patient with dyspnea performs three spirometry trials the PFT tech should do which of the following? correct answer: Perform at least one more maneuver PFT testing is contraindicated in which of the following conditions? correct answer: 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 answer: True Which of the following is the most important measurement for distinguishing an obstructive impairment? correct answer: FEV1/VC Measurement of lung volumes (TLC) is indicated correct answer: To diagnose restrictive lung disease The reported flow volume loop should come from which trial? correct answer: Trial 3 A subject being tested for possible environmental exposure to asbestos produces the following spirometery results correct answer: 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 answer: 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 answer: False DLCO is commonly used to monitor drug toxicity correct answer: True The following DLCO data (reported in ml CO/min/mmhg) are obtained from a subject. What should technologist do next? correct answer: 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 answer: 12% A patient with an FEV1 65% of predicted would be considered what severity of obstruction? correct answer: Moderate Restrictive lung disease is characterized by the reduction of lung volumes indicated by the _____ and ____ reduced below the lower limit of normal correct answer: TLC and VC Healthy adults without obstruction can expire their FVC within correct answer: 4-6 seconds