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Methacholine and Bronchial Challenge Testing

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1.  Before performing a methacholine challenge test (MCT), how long should patients withhold short-acting beta-agonist bronchodilators? 8 hours 4 hours 24 hours 48 hours

2.  If the RT chooses to conclude the MCT administration, what would be the determining factor? FEV1 has dropped 20% or greater from baseline or the highest concentration of the drug has been used FEV1 has dropped 10% from baseline Peak expiratory flow has increased by 50% from baseline Patient has completed three consecutive, consistent FEV1 tests

3.  A patient arrives at the testing laboratory for MCT. The patient has a productive cough and is wheezing. Which of the following should the RT do? Cancel the test and have the patient reschedule when he or she is asymptomatic Administer the test and document the patient’s breath sounds and sputum Give the patient an albuterol nebulizer and wait 30 minutes to start the test Give the patient an albuterol nebulizer and start the test immediately

4.  For both methods of MCT, what should the spirometry maneuvers include to achieve acceptable test results? Repeated at 30 and 90 seconds Repeated at 60 and 120 seconds Should be withheld for the duration of the testing Should be measured after all doses of methacholine have been administered

5.  When administering methacholine, the RT should do which of the following? Bring it to room temperature before testing Administer it immediately after taking it out of the refrigerator Mix it with albuterol in the nebulizer Administer it in a metered-dose inhaler