PFT Final Exam| 126 questions| with complete solutions

You are calibrating a spirometer with a super syringe, and after injecting 3L of air for three consecutive calibrations; the results are 2.8L, 3.0L, and 3.2L. Based on these results, the spirometer is considered: correct answer: Accurate Which of the following test is used as an indicator of ventilatory inspiratory muscle strength? correct answer: MIP Individuals with a resting SaO2 less than ____ at sea level are recommended to have a HAST prior to air travel. correct answer: 92% The ventilatory control tests for CO2 and O2 assess the correct answer: central (Co2) and peripheral (O2) chemoreceptors What is the calculation for Cardiac Output? correct answer: HR x SV What is the calculation for Stroke Volume? correct answer: End Systolic Volume - End Diastolic Volume What is the Dead Space ratio? correct answer: VD/VT What is the calculation for deadspace? correct answer: PaCO2-PeCO2 divided by PaCO2 What is the calculation for Alveolar Ventilation? correct answer: (VCO2/PaCO2) X 0.863 What is the normal minute ventilation? correct answer: 5-10 L/min What does the Wright Respirometer give you when referring to PFTs? correct answer: Slow Vital Capacity What is Respiratory Dead space? correct answer: Lung volume that is ventilating but not perfused by the pulmonary capillary blood flow. Made up by Anatomical and Alveolar VD. Also known as Physiological What conditions would give you a quick increase in dead space? correct answer: -Pulmonary Emboli -Pulmonary Hypertension -Accompanied by drastic SOB What is seen normally during exercise as VT increases and cardiac output increases promoting recruitment of vessels in the apices of the lungs? correct answer: Decreased Deadspace What is the normal Alveolar Ventilation? correct answer: 4-5 L/min