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PFT Mock Exam With Complete Solutions
Which of the following points should be used to calibrate a polarographic oxygen analyzer prior to performing an exercise stress test? a. 21% and 100% b. 0% and 100% c. 14% and 21% d. 0% and 21% - correct answers c. 14% and 21% Which of the following would be the BEST device to check volumes on a turbine spirometer? a. Rotameter b. 3L syringe c. Explosive decompression device D. Normal subjects - correct answers B. 3L syringe Which of the following should be used to check the volume calibration of a water-sealed spirometer? I. 50 mL syringe
II. A large volume calibration syringe III. A steady slow pressure a. I b. II c. III d. II and III - correct answers B. II. a large volume calibration syringe The effectiveness and accuracy of a pulse oximetry measurement is dependent on which of the following factors? I. Perfusion II. Blood volume III. Skin thickness a. I b. II c. I and II d. I, II, and III - correct answers D. I, II, and III: Perfusion, blood volume, and skin thickness Which of the following types of equipment consists of a collapsible bellows that folds or unfolds in response to breathing excursion?
the pH calibrating buffers for a blood gas analyzer should have values of: a. 6.840 and 7. b. 6.384 and 7. c. 6.391 and 7. d. 6.401 and 7.410 - correct answers a. 6.840 and 7. Which of the following instruments is used to check the accuracy and precision of volume measurements from a body plethysmography? a. rotameter b. super syringe c. isothermal lung d. a normal subject - correct answers c. isothermal lung which of the following does the Clark electrode directly measure? a. electric potential b. current change c. equilibration d. gas diffusion - correct answers b. current change
the accuracy of a pulse oximeter is affected by all of the following EXCEPT: a. high COHb levels b. hand tremors c. peripheral vasodilation d. bright ambient lights - correct answers c. peripheral vasodilation all of the following are directly related to oxygen consumption, EXCEPT: a. Vt b. repsiratory rate c: respiratory quotient d. Arterial pH - correct answers d. arterial pH in normal individuals, increased workload will have which of the following affects on oxygen consumption and carbon dioxide production: a. increased O2 consumption, decreased CO2 production b. increased O2 consumption, increased CO2 production
c. STPD d. ATPD - correct answers a. BTPS The most sensitive test for determining the presence of smaller airways disease is: a. FVC b. FEV c. FEF (25-75%) d. PEFR - correct answers c. FEF (25-75%) If a heated pneumotachometer used for the FVC maneuver is calibrated with a 3L syringe that is at ambient temperature, which of the following correction factors should be applied to the measured syringe volume? a. BTPS to STPD b. BTPS to ATPS c. STPD to ATPS d. ATPS to STPD - correct answers b. BTPS to ATPS Before performing a PFT, a patient should be told to not take their Albuterol inhaler for a minimum of how many hours prior to testing?
a. 4 hours b. 8 hours c. 12 hours d. 24 hours - correct answers a. 4 hours Which of the following pieces of equipment is needed to perform max expiratory pressures on a patient? I. 3 way stopcock II. noseclips III. calibrated manometer IV. a wright respirometer A. I & III V. II and IV C. I, II, and III D. I, II, III, IV - correct answers C. I, II, and III Which of the following flow-volume patters would represent a variable extra-thoracic obstruction? A. normal flows, decreased volume
b. TLC c. midpoint in the VC d. midpoint in the TV - correct answers b. TLC Which of the following is directly measured with the body box? a. Gaw b. FRC c. TLC d. TV - correct answers b. FRC At which of the following lung volumes/capacities would a patient's MIP produce the greatest value? a. RV b. TLC c. ERV d. IC - correct answers a. RV Which of the following factors will effect the diffusion capacity (DLCO) measurement? I. Hb
II. Blood volume III. Thickness of the alveolar capillary membrane a. I b. I and II c. I and III d. I, II, and III - correct answers d. I, II, and III A correctly performed open-circuit nitrogen washout test requires that the test last for: a. 7 minutes and/or until a final nitrogen concentration of 1% is measured b. 7 minutes and/or until a final nitrogen concentration of 10% is measured 10 minutes and/or until a final nitrogen concentration of 5% is measured 10 minutes and/or until a final nitrogen concentration of 10% is measured - correct answers a. 7 minutes and/or until a final nitrogen concentration of 1% is measured what is the initial concentration of CO in the spirometer when performing the DLCOSB?
III. N2 analyzer Iv. Spirometer a. I & II b. I & IV c. II & III d. III & IV - correct answers b. I & IV The most appropriate factors for evaluating the quality control data for a blood gas analyzer are the: a. mean and two standard deviations b. mean and one standard deviation c. average and standard error of the mean d. average and establish a 20% confidence interval - correct answers a. mean and two standard deviations All of the following may be used to assure quality control on a blood gas analyzer EXCEPT: a. tonometered blood b. emulsified fluorocarbons c. assayed solutions
d. 1 molar potassium chloride - correct answers d. 1 molar potassium chloride according to ATS/ERS standards, the accuracy of an instrument measuring FEVT must be within a. +/- 1.5% or 40 mL b. +/- 2.0% or 45 mL c. +/- 3.5% or 50 mL d. +/- 4.0% or 60 mL - correct answers c. +/- 3.5% or 50 mL A patient's actual FEV1 multiplied by 35 will give an estimation of a. TLC b. MVV c. VC d. FRC - correct answers b. MVV According to ATS/ERS standards, which of the following are criteria for acceptance of a single breath diffusing capacity measurement? I. smooth, rapid inspiration
a. MSDS b. HHS c. OSHA d. NIOSH - correct answers c. OSHA Pneumotachometers can provide an accurate means for documenting flowrates if which of the following conditions are met? I. the same pressure and gas composition used for calibration of the device are used for measurements II. the device is calibrated according to the manufacturers specifications III. the device is properly cleaned and maintained a. I & III b. II and IIIc. II d. I, II, III - correct answers d. I, II, III I. the same pressure and gas composition used for calibration of the device are used for measurements II. the device is calibrated according to the manufacturers specifications III. the device is properly cleaned and maintained
While checking the accuracy of an x-y recorder, the PFT tech notes that the time is inaccurate on the x-axis. This would effect all of the following measurements EXCEPT: a. FVC b. FEF 25-75% c. FEV d. PEFR - correct answers c. FEV Before a waster sealed spirometer is used, the most appropriate way to check for leaks is to: a. add water to the reservoir b. add a known volume with a syringe. c. place a weight on the bell and check the pen movement for 5 minutes d. apply a known constant flow for 5 minutes - correct answers c. place a weight on the bell and check the pen movement for 5 minutes the best method for disinfection of pulmonary function breathing hoses and mouth pieces is: a. ethylene oxide
Vt: 200 f: 32 a. 20% b. 40% c: 50% d. 75% - correct answers (40-20)/40 = 50% c. 50% If a patient had the following ABG, what would their estimated oxygen saturation be? pH: 7. PaCO2: 50 PaO2: 60 Hb: 13 gm/100 mL CaO2: 16 vol % FiO2:. a. 75% b. 80%
c. 90% d. 100% - correct answers 60 + 30 = 90 c. 90% A patient has a minute alveolar ventilation of 10 liters/minute. Which of the following sets of parameters would produce this value? a. Vt 400 RR 20 VDanat 100 cc b. Vt 550 RR 20 VDanat 200 cc c. Vt 1000 RR 20 VDanat 200 cc d. Vt 650 RR 20 VDanat 150 cc - correct answers 650 - 150 = 500 x 20 = 10L d. Vt 650 RR 20 VDanat 150 cc Based on the data below, what is the patient's PAO2? Pb: 747 torr PaCO2: 40 torr VD/VT: 25% FiO2:.
