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What are the gases normally used to measure the diffusing capacity of the lung?  CO2 and O2     CO2 and He  CO and He  CO and O2

Which of the following statements are true regarding measurement of the patient’s forced vital capacity (FVC)?1.  The patient can be sitting or standing.2.  Nose clips are not required.3.  It is an effort-dependent test.4.  Accurate results can be obtained without patient cooperation.    

What type of obstruction is present below?  

Which of the following factors could result to a decreased DLCO? (Multiple Answers) 

Which of the following measurements in a FVC maneuver can determine problems involving the large airways?  FEF200-1200  FEF25%-75%  PEFR  FIF50%

The following patient is a 55-year-old male that has smoked for 30 pack/yrs.  What is the interpretation of his pulmonary function study based on the information below?       TESTS                   ACTUAL             PREDICTED             %PREDICTED       FVC                         2.17                       4.1                              53%       SVC                         2.62                       4.1                              64%       FEV1                       1.O4                      3.1                               34%       FEV3                        2.0                        3.9                               51%       FEV1/FVC%           48%                      76%                             ——       MVV                        1.6                        3.5                               46%       RV                            1.34                      0.82                            163%       FRC                         2.32                       1.64                            141%       TLC                         7.48                       4.92                            152%       DLCO                       4.4                        8.6                               51%

Which of the following describes the flow-volume loop (purple line) shown above?  Variable intrathoracic upper airway obstruction.  Fixed upper airway obstruction.  Unilateral main-stem obstruction.  Variable extrathoracic upper airway obstruction.

On a patient performing a flow-volume loop maneuver in the PFT Lab, you observe a reduced inspiratory flow with a high FEF50%/FIF50% ratio (purple line).   This most likely indicates which of the following?

To ensure validity of the forced vital capacity (FVC) measurement, how many attempts should the patient perform?        

Which of the following are considered as pulmonary (airway) mechanics? (Multiple Answers) FEF/FEF FVC FRC FEVT MVV