PFT Final Exam|| 92 questions|| with complete solutions

What does the term phase delay pertain to? correct answer: Alignment of the gas analyzer with the flow signal What will typically happen to the end-expiratory lung volume during exercise in subjects with COPD? correct answer: Increase Which of the following are considered noninvasive methods for calculating CO during exercise? 1. CO2 rebreathing 2. Fick method 3. Thermal dilution 4. The acetylene technique correct answer: 1 and 4 Which of the following would be most appropriate gas mixtures for calibrating the analyzers used for exhaled gas analysis during exercise? correct answer: Room air, 12% O2, 5% CO2 A subject whose FEV1 is 1.1 L has the following results of an exercise test (values in parentheses are percents of predicted)O2 max L/min (STPD)1.77 (51)HRmax beats/min117 (73)E max L/min (BTPS)37Which best describes these results? correct answer: Moderate to severe exercise impairment with ventilatory limitation A subject has the following values measured by exhaled gas analysis at maximal exercise FIO 20.21 FEO 20.16 FECO 20.04 E 33.0 L (STPD) What is the subject's O2 in liters per minute (STPD)? correct answer: 1.74 Which combination of gases would be most appropriate to check the linearity of the oxygen analyzer used for exhaled gas analysis during exercise? correct answer: Room air, 15% O2, 24% O2 Which of the following are required to perform a 6-minute walk test? 1. 100-foot corridor 2. Lap counter 3. Pulse oximeter 4. Count-down timer correct answer: 1, 2, and 4 Which of the following can be used to identify the anaerobic or ventilatory threshold? 1. Increase in blood lactate 2. Increase in blood pH 3. Change in the rate of CO2 in relation to O2 4. A plateau in the O2 correct answer: 1 and 3