Exam 20: Pulmonary Function Testing

Which of the following statements is true about inspiratory capacity (IC)? 1. It is reduced in restrictive lung diseases. 2. It may be reduced in obstructive lung diseases. 3. It may help determine the type of lung expansion therapy to apply.

Which of the following statements is true when comparing the pulmonary function test results of men versus women?

Comprehensive quality assurance of pulmonary function testing consists of which of the following: 1) The accuracy and precision of the measured instrument. 2) Patient must be able to do a breath-hold between 3 and 5 sec. 3) The performance of the technologist. 4) Test results when measuring a standard.

How closely a device measures a certain reference value refers to what quality?

What is the normal predicted vital capacity (VC) measurement in the adult patient?

How often should a spirometer in continual use undergo volumetric calibration?

Toward the end of a nitrogen washout test for functional residual capacity, the expired concentration of N₂ begins rising. What does this probably indicate?

A patient has a decreased DLCO but a normal DLCO/V_A ratio. The patient most likely has:

What is the minimum objective standard for the volume exhaled during the final 1 sec of an acceptable forced vital capacity effort?

Which of the following are true statements regarding the volume of tissue nitrogen excreted during the N₂ washout test for measuring functional residual capacity (FRC)? 1) It is not a factor. 2) It varies with the length of the test. 3) It varies with the weight of the patient. 4) It cannot be correct.

What is the normal average inspiratory capacity (IC)?

What is a normal single-breath diffusing capacity for carbon monoxide for a young, healthy man of average size?

Which of the following measure is typically increased in patients with restrictive lung disease?

What is the American Thoracic Society standard for volumetric accuracy of spirometers?

To what should all spirometric values obtained under ambient conditions be converted?

How can you ensure reliability when measuring the expiratory reserve volume (ERV)?

You perform a series of pulmonary function tests on a patient with a potentially infectious disease carried via the airborne route. Which of the following infection-control procedures should you implement? 1) Wear a respirator or close-fitting surgical mask. 2) Dispose of, sterilize, or disinfect the tubing circuit after testing. 3) Clean the interior surface of the spirometer before the next test.

Airway resistance (R_aw) is usually defined as:

Normal healthy people can exhale what percentage of the forced vital capacity in 1 sec?

Under which of the following conditions would you postpone a diffusing capacity test? 1) Just before the test, the patient smoked two cigarettes. 2) Just before the test, the patient had an episode of severe coughing. 3) Just before the test, the patient had a long wait at a busy bus stop.