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NBRC Pulmonary Function Studies with Complete Solutions
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NBRC Pulmonary Function Studies with Complete Solutions
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NBRC Pulmonary Function Studies withComplete Solutions
A patient who cannot generate MIP of at least -20 cm H2O of pressure has - ANSWER-
inadequate respiratory muscle strength
An FEV1/FVC of <70 % will indicate what? - ANSWER-Obstructive disease
FEF200-1200 - ANSWER-The average flow rate of the exhaled air after the first 200 mL
during an FVC maneuver.
Normal? 6-7 L/sec (400 L/min)
FEF25%-75% - ANSWER-The average flow rate during the middle portion of the FEV.
Normal 4 to 5 L/sec
FEV is usually decreased in? - ANSWER-in both obstructive and restrictive disease.
FEV1/FVC (ratio) - ANSWER-A ratio of the relationship of FEV to FVC.
Forced expiratory volume
(FEV0.5, FEV1, FEV3) - ANSWER-The volume of air that is exhaled over a specific
time interval during the FVC maneuver.
b. It's measured over 0.5, 1, or 3 sec. The FEV1 is the most common measurement.
Maximal Inspiratory Pressure (MIP) or nif - ANSWER-This value represents the
maximum amount of negative pressure a patient can generate during inspiration.
Maximum voluntary ventilation (MVV) - ANSWER-The maximum volume of air moved
into and out of the lungs voluntarily in 10, 12, or 15 sec.
Methacholine Challenge Test - ANSWER-The objective of the test is to determine the
minimum level of methacholine that elicits a 20% decrease in FEV1.
MVV tests what? Normals? - ANSWER-This measurement tests for overall lung
function, ventilatory reserve capacity, and air-trapping.
Normal value is 170 L/min.
Obstructive and restrictive FEV/FVC - ANSWER-Obstructive disease is indicated by
below normal values of FEV/FVC. Patients with restrictive disease have normal or
above normal values.
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