RCP180 Midterm Flashcards QUESTIONS WITH COMPLETE SOLUTIONS

According to the 2005 ATS-ERS repeatability standards, of the three following tracings, the two largest FVC values and the two largest FEV1 values should be within how many milliliters? correct answer: 150 Before bronchodilator studies, inhaled B-adrenergic agents should be withheld for how long? correct answer: 4-12 hours for regular of long-acting preparations The FEF25-75% depends on which of the following correct answer: FVC Back extrapolation is the method used to determine "time zero" which is crucial in accurate measurement of which of the following parameters? correct answer: FEV1 A subject has an FVC of 1.8 L (39% of predicted). The same individual has a slow VC of 2.7L. Which of the following might explain these findings? correct answer: Obstructive lung disease and poor effort or early termination of the FVC IN addition to the FEV1 and FVC, which of the following is useful in gauging subject efforts during spirometry correct answer: PEF Predicted values are based on which of the following (4 things) correct answer: Age Height Gender race A subject who complains of shortness of breath has an FVC of 2.57 L, but her VC is 2.99 L. These findings suggest which of the following? correct answer: emphysema In diseases that cause obstruction of the small airways, the MEFV curve aka FVC may assume a concave appearance because of: correct answer: Loss of elastic recoil and increased airway resistance The simplest type of flow sensing device is the "turbine device" (Wright's respirometer) it measures flow and displays? correct answer: volume What principle does a nitrogen gas analyzer use? correct answer: Geissler Tube analyzer Which of the following correctly describes the measurement of FRC by the open-circuit method? (2 things) correct answer: -The test is continued until alveolar N2 is reduced to 1-1.5%. -some N2 is released from the blood and tissues and must be considered in the calculation