PFT Midterm Exam Questions Answered
Right
what are the general purposes of performing pulmonary function tests (PFTs)? - Correct
Answer The functional status of the lungs; Diffusion characteristics of the alveolar-
capillary membrane; How much and how fast gas can be moved into and out of the
lungs
What parameters have been studied to establish normal values for PFTs? - Correct
Answer height, weight, gender
what factor has the greatest influence on lung size and predicted PFT values? - Correct
Answer height
what is the primary instrument used in performing PFTs? - Correct Answer spirometer
what is standard equipment in a pulmonary function laboratory? - Correct Answer
Spirometer; gas analyzer; Body plethysmograph
The volume of air inhaled and exhaled during quiet breathing is known as the: - Correct
Answer tidal volume
what is the most common cause of erroneous FVC test results? - Correct Answer
Suboptimal coaching
What may cause the FVC to decrease in a patient with a restrictive lung disorder? -
Correct Answer a decrease in lung size
Which level of VC is associated with increased risk of respiratory failure? - Correct
Answer <15 ml/kg
Total lung capacity (TLC) is a function of: - Correct Answer size, age, gender
The body plethysmograph uses which of the following gas laws? - Correct Answer
boyle's law
In which of the following diseases will the open-circuit nitrogen washout method tend to
underestimate the total lung volume? - Correct Answer emphysema
The closed-system helium dilution method is used to measure: - Correct Answer FRC
Right
what are the general purposes of performing pulmonary function tests (PFTs)? - Correct
Answer The functional status of the lungs; Diffusion characteristics of the alveolar-
capillary membrane; How much and how fast gas can be moved into and out of the
lungs
What parameters have been studied to establish normal values for PFTs? - Correct
Answer height, weight, gender
what factor has the greatest influence on lung size and predicted PFT values? - Correct
Answer height
what is the primary instrument used in performing PFTs? - Correct Answer spirometer
what is standard equipment in a pulmonary function laboratory? - Correct Answer
Spirometer; gas analyzer; Body plethysmograph
The volume of air inhaled and exhaled during quiet breathing is known as the: - Correct
Answer tidal volume
what is the most common cause of erroneous FVC test results? - Correct Answer
Suboptimal coaching
What may cause the FVC to decrease in a patient with a restrictive lung disorder? -
Correct Answer a decrease in lung size
Which level of VC is associated with increased risk of respiratory failure? - Correct
Answer <15 ml/kg
Total lung capacity (TLC) is a function of: - Correct Answer size, age, gender
The body plethysmograph uses which of the following gas laws? - Correct Answer
boyle's law
In which of the following diseases will the open-circuit nitrogen washout method tend to
underestimate the total lung volume? - Correct Answer emphysema
The closed-system helium dilution method is used to measure: - Correct Answer FRC
