Question 1

A correctly performed nitrogen washout test requires that the test last for:

  1. 7 minutes and/or a final N2 concentration of 10% is measured
  2. 10 minutes and/or until a final N2 concentration of 5% is measured
  3. A final concentration of 10% is measured for 3 successive breaths
  4. A final N2 concentration of 1.5% is measured for 3 successive breaths

 

Question 2

A helium dilution study is being performed on a patient with a history of asbestosis’ exposure. After the test is completed, the following information is obtained:A spirometer holding 7 liters of air (Vs) was used with an initial concentration of He analyzing at 10%. Final concentration of He analyzed at 8%. According to the above information, you would record the patient’s FRC to be:

  1. 3.58 Liters
  2. 4.26 Liters
  3. 1.75 Liters
  4. 750 ml

 

Question 3

A patient is to perform a nitrogen washout test for determination of FRC. At what point in the patient’s ventilation should the patient be switched in to 100% O2?

  1. At the end expiratory level
  2. At the beginning of normal expiration
  3. At the beginning of normal inspiration
  4. At the end inspiratory level

 

Question 4

A patient who cannot pant correctly during a body box test should be instructed to:

  1. Breathe at a slower rate and tidal volume
  2. Place hands on the cheeks and prevent movement during panting maneuver
  3. Close the glottis while panting
  4. Remove nose clips and continue panting

 

Question 5

A patient with air trapping must have determination of lung volumes for determination of FRC. The physician asks you to recommend the methods would best determine actual values for this patient. You would suggest:

  1. Nitrogen washout
  2. Helium dilution
  3. Body plethysmography
  4. Radiological estimation

 

Question 6

A patient’s vital capacity can be calculated by using which of the following equations?

  1. TLC – RV
  2. IC + FRC
  3. IRV + VT + ERV
  4. FRC + VT
  5. IC + FRC

 

Question 7

All of the following equations are correct with the EXCEPTION of:

  1. IC = IRV + VT
  2. VC = IC + FRC
  3. VT = IC – IRV
  4. ERV = VC – IC

 

Question 8

All of the following equipment would be necessary for a nitrogen washout test, EXCEPT:

  1. Valve that opens to 100% O2
  2. He analyzer
  3. N2 analyzer
  4. Spirometer and recording device

 

Question 9

All of the following statements are true regarding the use of the body plethysmograph EXCEPT:

  1. Patients should be taught correct technique by demonstration prior to testing
  2. The body plehtysmograph should be calibrated weekly
  3. PFT technicians should acquire at least three acceptable panting maneuvers
  4. IV’s should be temporarily disconnected prior to testing

 

Question 10

Body plethysmographs are most beneficial for the determination of:

  1. Peak expiratory flowrate
  2. Intrathoracic gas volume
  3. Airway resistance
  4. Intrapulmonary gas diffusion

 

Question 11

Calculate the IC when the TLC is 5500 ml and the FRC is 2300 ml.

  1. 2300 ml
  2. 3200 ml
  3. 5500 ml
  4. 7800 ml

 

Question 12

Calculate the RV when the TLC is 6200 ml and the VC is 4900 ml.

  1. 1200 ml
  2. 1100 ml
  3. 1300 ml
  4. 1400 ml

 

Question 13

During the measurement of FRC using the body plethysmograph, at least three to five satisfactory panting maneuvers should be obtained, with at least three FRC values that agree within:

  1. 5%
  2. 0.200 liters
  3. 7%
  4. 10%

 

Question 14

Given IRV = 2900 ml, Vt = 400 ml, ERV = 1350 ml, and RV = 1400 ml. The FRC would be calculated as:

  1. 3300 ml
  2. 2750 ml
  3. 1600 ml
  4. 4650ml

 

Question 15

Given IRV = 2900 ml, Vt = 400 ml, ERV = 1350 ml, and RV = 1400 ml. The IC would be calculated as:

  1. 6050 ml
  2. 3300 ml
  3. 1400 ml
  4. 4650ml

 

Question 16

Given IRV = 2900 ml, Vt = 400 ml, ERV = 1350 ml, and RV = 1400 ml. The TLC would be calculated as:

  1. 2750 ml
  2. 3300 ml
  3. 1600 ml
  4. 6050 ml

 

Question 17

Given IRV = 3000 ml, VT = 650 ml, ERV = 1100 ml, RV = 1150 ml
FRC is equal to:

  1. 3650 ml
  2. 2250 ml
  3. 2900 ml
  4. 4750 ml

 

Question 18

Given IRV = 3000 ml, VT = 650 ml, ERV = 1100 ml, RV = 1150 ml
IC is equal to:

  1. 3650 ml
  2. 2250 ml
  3. 4750 ml
  4. 2900 ml

 

Question 19

Given IRV = 3000 ml, VT = 650 ml, ERV = 1100 ml, RV = 1150 ml
TLC is equal to:

  1. 2900 ml
  2. 5900 ml
  3. 4800 ml
  4. 3650 ml

 

Question 20

Given IRV = 3000 ml, VT = 650 ml, ERV = 1100 ml, RV = 1150 ml
VC is equal to:

  1. 3650 ml
  2. 4750 ml
  3. 2900 ml
  4. 2250 ml

 

Question 21

Given: IRV = 2900 ml, Vt = 400 ml. ERV = 1350 ml, RV = 1400 ml. The VC would be calculated as:

  1. 2750 ml
  2. 3300 ml
  3. 6050 ml
  4. 4650 ml


Question 22

If the IC is 3200 ml, and the VT is 500 ml, what is the IRV?

  1. 3200 ml
  2. 2700 ml
  3. 500 ml
  4. 3700 ml

 

Question 23

Results of a pulmonary function study on a patient report a VC of 3600 ml, a FRC of 6000 ml, and an RV of 1000 ml. What is the total lung capacity?

  1. 9600 ml
  2. 7000 ml
  3. 8600 ml
  4. 4600 ml

 

Question 24

TLC is equal to which of the following?

  1. VC + RV
  2. IC + FRC
  3. VC + FRC
  4. IC + ERV

 

Question 25

The FRC measured by body plethysmography is 30% larger than that measured by Helium dilution. This difference is best explained by an increase in which of the following?

  1. Airway resistance
  2. Diffusing capacity
  3. Residual volume
  4. Lung compliance

 

Question 26

The largest volume of gas that can be expired from a resting end-expiratory level is known as the:

  1. Expiratory reserve volume
  2. Inspiratory reserve volume
  3. Residual volume
  4. Vital capacity

 

Question 27

The largest volume of gas that can be inspired above a normal tidal volume breath is the:

  1. Tidal volume
  2. Residual volume
  3. Inspiratory reserve volume
  4. Inspiratory capacity

 

Question 28

The operation of the body box is based on which of the following laws?

  1. Charles’
  2. Poiseuille’s
  3. Boyle’s
  4. Dalton’s

 

Question 29

The sum of IRV and Vt is equal to:

  1. VC
  2. FRC
  3. TLC
  4. IC

 

Question 30

The total amount of gas in the lungs following a maximum inspiration is described as the:

  1. Total lung capacity
  2. Vital capacity
  3. Inspiratory reserve volume
  4. Tidal volume

 

Question 31

The volume of gas in the lungs that can be exhaled from end-inspiratory level during normal or tidal breathing is the:

  1. Expiratory reserve volume
  2. Functional residual capacity
  3. Residual volume
  4. Total lung capacity

 

Question 32

The volume of gas which remains in the lung at the end of a maximum expiration is known as:

  1. Residual Volume
  2. Expiratory Reserve Volume
  3. Functional Residual Capacity
  4. Vital capacity

 

Question 33

When measuring FRC in the body plethysmograph, the relationship between mouth pressure and body box volume changes occur during:

  1. The closed-shutter maneuver
  2. The open-shutter maneuver
  3. Looping of the mouth pressure signal
  4. Hard and fast panting

 

Question 34

Which of the following are true concerning the measurement of FRC using the multiple-breath closed-circuit helium (He) dilution test:

  1. The volume in the spirometer and circuit must be known
  2. The test continues until equilibration (change in He concentration < 0.02% over 30
    seconds
  3. Nitrogen must be measured continuously
  4. Oxygen must be absorbed
  5. Carbon dioxide must be absorbed

 

Question 35

Which of the following could result in inaccurate results during a helium dilution test?I. Ruptured eardrumII. “Switch-in” occurred prematurelyIII. Failure to use noseclips during test

  1. Ruptured eardrum
  2. “Switch-in” occurred prematurel
  3. Failure to use noseclips during test

 

Question 36

Which of the following equations is INCORRECT for calculating the total lung capacity?

  1. TLC = IRV + VT + ERV
  2. TLC = IC + FRC
  3. TLC = VC + RV
  4. TLC = IRV +VT + ERV+ RV

 

Question 37

Which of the following is equal to RV?

  1. FRC – ERV
  2. TLC – VC
  3. VC – ERV
  4. IC – IRV

 

Question 38

Which of the following methods of lung volume determination correlates best with body plethysmography in patient’s with obstructive diseases?

  1. Helium dilution
  2. Single-breath washout
  3. Radiological estimation
  4. Nitrogen washout

 

Question 39

Which of the following methods would provide the most accurate determination of the volume of gas in the lungs at end-tidal expiration for a patient who has severe emphysema?

  1. Nitrogen washout
  2. Body-box
  3. Helium dilution
  4. Single breath studies

 

Question 40

Which of the following parameters cannot be directly obtained from a spirometry tracing?

  1. IRV
  2. FRC
  3. IC
  4. ERV

 

Question 41

Which of the following statements are correct about the measurement of FRC by the nitrogen washout method?

  1. The patient is required to pant during the maneuver
  2. The test is continued until alveolar N2 is less than 1.5%
  3. Patient breathes 100% O2
  4. A nitrogen analyzer is required

 

Question 42

Which of the following test can be used to determine FRC?

  1. FVC
  2. He Dilution
  3. Nitrogen Washout
  4. Peak flow studies

 

Question 43

While performing a closed-circuit gas dilution test, the patient’s breathing pattern begins to increase and an increase in the patient’s tidal volume is noticed. Which of the following best explains the patient’s symptoms?

  1. The CO2 scrubber is missing from the circuit
  2. The patient has exerted too much effort during expiration
  3. The patient has developed bronchospasm
  4. The patient is fatigued from testing

 

Question 44

You have just completed a Nitrogen washout test to determine a patient’s FRC. The computer has given you an erroneous reading and you wish to calculate the FRC yourself using the following formula: The following results are available:Initial N2 reading – 75%. Final N2 reading – 9%. Exhaled volume in Tissot spirometer – 26 Liters.What would you record as your patient’s FRC?

  1. 2.97 L
  2. 4.12 L
  3. 3.52 L
  4. 3.12 L

 

Question 45

You instruct your patient to take a maximum inspiration followed by a maximum expiration. You have just instructed your patient to perform a:

  1. Inspiratory Reserve Volume
  2. Tidal volume breath
  3. Vital Capacity
  4. Inspiratory Capacity