PFT

Forced Expiration (FEV) correct answer: Forced expiration is a simple but extremely useful pulmonary function test. A spirometry tracing is obtained by having a person inhale to total lung capacity and then exhaling as hard and as completely as possible. These tracings are a very effective way of separating normal ventilatory states from obstructive and restrictive states. In a normal forced expiration curve, the volume that the subject can expire in one second (referred to as FEV1) is usually ...

According to ATS standards PFT results should always be reported in ___________? correct answer: BTPS Which of the following is used to determine DLCO because of a high affinity for hemoglobin? correct answer: Carbon monoxide Prior to bronchodilator administration a patient has a FEV1 of 2.4 L. After 2 puffs of an Albuterol MDI the subjects FEV1changed to 3.4 L. Calculate the percent improvement. correct answer: 42% increase A neuromuscular disease can cause a decrease in strength to...

What does the term phase delay pertain to? correct answer: Alignment of the gas analyzer with the flow signal What will typically happen to the end-expiratory lung volume during exercise in subjects with COPD? correct answer: Increase Which of the following are considered noninvasive methods for calculating CO during exercise? 1. CO2 rebreathing 2. Fick method 3. Thermal dilution 4. The acetylene technique correct answer: 1 and 4 Which of the following would be most appropriate g...

When bronchoprovocation testing is used, the FEV1 needs to decrease by what percentage before a diagnosis of hyperactive airways is made? correct answer: 20% What do relative contraindications for lung volume determinations include? 1. Patient with dementia 2. Unstable cardiovascular status 3. Untreated pneumothorax 4. Hemoptysis of unknown origin correct answer: 1234 A patient has a TLC of 6700 mL, an IRV of 2500 mL, and a FRC of 3500 mL. What is the patient's VT correct answer: 0...

What is Pulmonary Function Testing? correct answer: tests used to determine lung function. include :measurement of lung volume, capacity, flow rate, and gas exchange What is Spirometry test? correct answer: It measures the amount of air that you can breathe in and out and how quickly you exhale air. What are the contraindications of pulmonary function testing? correct answer: Hemoptysis, Pneumothorax, Myocardial Infarction, Pulmonary embolism, Acute chest or abdominal pain, Nausea, Vom...

A 22 year old patient with dyspnea performs three spirometry trials the PFT tech should do which of the following? correct answer: Perform at least one more maneuver PFT testing is contraindicated in which of the following conditions? correct answer: Untreated pneumothorax An FEV1% is less tha predicted is a good indication for bronchodilator studies. However, FEV1% should not be used to judge bronchodilator response correct answer: True Which of the following is the most important m...

What are the indications of PFT? correct answer: -evaluate symptoms and signs of lung disease -assess progression of lung disease -monitor effectiveness of therapy -evaluate preoperative patients to confirm tolerance of anesthesia -to screen people at risk for pulmonary disease -to monitor for potentially toxic effects of certain drugs or chemicals like chemotherapy -screen smokers and people exposed to toxic substances -monitor beryllium and amiodorone what are the limitations of P...

Spirometry correct answer: Measurement of gas flow Four Lung Volumes correct answer: TV, IRV, ERV, RV Tidal Volume (TV) correct answer: Volume of gas inspired or expired during normal breathing Inspiratory Reserve Volume (IRV) correct answer: the maximum amount of gas that can inspired from the resting inspiratory position Expiratory Reserve Volume (ERV) correct answer: the maximum volume of gas that can be expired from resting expiratory position Residual Volume (RV) correct...

Which of the following are indications for assessing pulmonary function? 1. Screen for pulmonary disease. 2. Evaluate patients for surgical risk. 3. Assess the progression of disease. 4. Assist in diagnosing cardiac disability. correct answer: 1. Screen for pulmonary disease. 2. Evaluate patients for surgical risk. 3. Assess the progression of disease. Which of the following are considered relative contraindications for lung volume determinations? 1. Recent cataract removal surgery 2...

Where is the 6 minute walk test performed? correct answer: Hard flat surface What does the 6 minute walk test measure? correct answer: The distance walked in a period of 6 minutes and evaluates functional exercise capacity Patients choose their own ____ and they may/may not stop and rest during the test correct answer: Intensity May 6 MWT does not determine _____ or _______ correct answer: Peak Oxygen consumption Mechanisms of exercise limitations like the CPET _____ is simil...