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PFTs

RESP171

QuestionAnswer
What is the most commonly measured pulmonary mechanic during a PFT? Forced Vital Capacity
Inpiratory Capacitiy and Residual Volume add up to Total Lung Capacity T or F ? False about 6,000 mL, is the maximum amount of air that can fill the lungs (TLC = TV + IRV + ERV + RV). OR IC + FRC = TLC
Indications (or reasons) for assessing a patient's pulmonary status. -Screen for pulmonary disease- -Evaluate patient's pre-surgical pulmonary risk -Assess for the progress of existing pulmonary illness-Assist in the determination of pulmonary disability-Modify therapeutic approach for the patient
What is the American Thoracic Society standard for volumetric accuracy of spirometers? +/-3% error or within 50mL of the reference value
You perform a series of pulmonary functions tests on a patient with a potential infectious disease carried via airbourne route. Choose ALL of the following infection control procedures you should implement -Wear a close fitting mask or respirator while testing the patient.-Dispose of, sterilize or disinfect the tubing circuit after the testing.***It is NOT necessary to clean the interior of the spirometry unity, since you use a filter.
Which of the following choices is typically elevated in patient with restrictive lung disease? Pressure needed to expand the lungs (decreased compliance)
A spirometer is a device that directly collects and measures gas flows. T or F False measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled
What device would you use to determine the accuracy of the spirometer in measuring lung volumes? A calibrated 3-Liter syringe
Accurate test results can be obtained on basic spirometry without patient cooperation. T or F False They need to be compliant
Absolute or relative contraindications for lung volume determinations. Recent cararact surgery-Unstable cardiac status-Untreated pneumothorax-Child less than 12 years of age-Hemoptysis of unknown origin
You are performing a Methacholine Challenge to assess your patient for airway hypersensitivity. Your patient received a 0.3mg/mL dose of methacholine and showed no change from baseline on their PFT. What should you do next? Double the dose and repeat the FVC test
The normal FEV1 is roughly 60% of the forced vital capacity that healthy people can exhale in one second. T or F False correct answer is 80-90%
FEV1 Volume of air you can forcefully exhale in one second
FVC Amount of air you can forcefully exhale after maximal inspiration.
IC Amount of air you can exhale after normal inhalation
ERV Amount of air you can still exhale after a normal exhalation
TLC Largest amount of air the lungs can hold
FEV1/FVC Ratio of the volume of air exhaled in one second to the total volume exhaled
VT Volume inspired with a normal breath
MVV Greatest amount of air you can breath in 12 to 15 seconds
When performing a FVC maneuver pre and post bronchodilator, what percent increase in FEV1 is needed to say the treatment was effective in reversing/reducing the patient's airway obstruction 15%
Testing of pulmonary mechanics (spirometry) include all of the following measurements except: Residual Volume
Capacity refers to a device that measures a certain reference value. False It is not a device
The Functional Residual Capacity is the largest of the normally measured pulmonary capacities. T or F False Vital Capacity??
To insure you have a valid FVC measurement on your patient, how many attempts should you have the patient perform? Three acceptable
According to ATS standards, how often should a spirometer in continual use undergo volumetric calibration? at least daily
Syncope is one of the possible adverse reactions seen in patients during PFTs. T or F True
What is the primary problem in obstructive lung disease? Increased airway resistance
Residual volume can not be measured by simple spirometry T or F? True
FEV1/FVC of less than ___% is diagnostic for Obstructive Lung Disease. 70
Created by: fsubull
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