Pft flashcard questions with complete solutions

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 the respiratory muscles. Which diagnostic value would indicate that the patient would need to be placed on mechanical ventilation? correct answer: MIP < 20 cmH2O : Yes VC < 10 ml/Kg : Yes FEV1% < 70% : No FRC < 120% : No Which of the following tests is the determinate factor when diagnosing obstructive sleep apnea? correct answer: Polysomnography Which of the following can be used to calculate the Inspiratory Capacity (IC)? correct answer: VC - ERV Which of the following simple devices is primarily used for hospital bedside, and home monitoring of an asthma patient's degree of airway obstruction? correct answer: Peak flow meter The definition "devices that measure flow and convert the results in to a volume reading" best describes which device? correct answer: Pneumotachometer Peak expiratory flow rate is used to monitor which of the following? correct answer: The total amount of force used to exhale The FRC would likely be shown to be increased above normal in: correct answer: Pulmonary fibrosis: no Chronic Bronchitis: yes Asbestosis: no Emphysema: yes N2 (Nitrogen) washout can be used to derive which of the following volumes/capacities? correct answer: FRC : yes TLC : no RV : yes IC: no