Deck 10: Specialized Test Regimens

Question 1

When performing an open-circuit indirect calorimetry study,the technologist notices that the RER is 0.65.What should the technologist do next?

A) Stop the test and ask the subject whether the subject has diabetes.
B) Stop the test because the subject obviously ate before the test.
C) Stop the test and recalibrate the instrument.
D) Instruct the subject to stop hyperventilating.

Answer 1

C

Question 2

A patient referred for exercise testing for disability determination should have which of the following?

A) Six-minute walk with pulse oximetry to document hypoxemia
B) Five minutes of treadmill exercise at 1.7 mph,10% grade
C) Four to 6 minutes of treadmill exercise at 5 METs with blood gases
D) Cycle ergometer exercise at 85% predicted maximum HR with pulse oximetry

Answer 2

C

Question 3

A small leak is introduced into the breathing circuit during the measurement of MIP and MEP to do which of the following?

A) Allow flow into the alveoli.
B) Prevent artifact caused by the cheek muscles.
C) Zero the pressure measuring apparatus before the maneuver.
D) Stabilize the chest wall during airway occlusion.

Answer 3

B

Question 4

A patient has a metabolic study performed with the following results: If the patient's 24-hour urinary nitrogen (UN)is 22 g/24 hours,what is the approximate REE?

A) 1480 kcal/24 hours
B) 2084 kcal/24 hours
C) 2132 kcal/24 hours
D) 2666 kcal/24 hours

Question 5

Which of the following is consistent with a properly performed impulse oscillometry procedure performed on an 8-year-old female?

A) Report the mean of two maneuvers.
B) Instruct the subject to breathe for 20 minutes.
C) Complete three maneuvers repeatable within 10%.
D) Describe the quick puffing of the device.

Question 6

A 53-year-old female with a history of myasthenia gravis has the following pulmonary function results: These findings are:

A) Consistent with her known disease process
B) Not consistent with myasthenia gravis
C) Consistent with severe obstruction
D) Consistent with severe obstruction with a reduction in respiratory muscle pressure

Question 7

Which two variables are used in the Weir equation to calculate the REE?

A) O₂ and CO₂
B) Respiratory gas exchange and urinary nitrogen
C) Respiratory quotient (RQ)and respiratory rate
D) PETCO₂ and nitrogen

Question 8

The VC may decrease as much as _____ after thoracic or upper abdominal surgery.

A) 10%
B) 20%
C) 50%
D) 90%

Question 9

An indirect calorimetry system uses a dilution technique that mixes a constant flow of entrained air with expired gas.This technique allows determination of which of the following?

A) Exhaled ventilation
B) End-tidal CO₂
C) V_D/V_T
D) FEO₂

Question 10

A patient has his or her resting energy expenditure (REE)measured while breathing from a spirometer that has been filled with O_2. This technique is described as:

A) Open-circuit calorimetry
B) Closed-circuit calorimetry
C) Bias-flow calorimetry
D) The Consolazio method

Question 11

Which of the following blood gas values suggests an increased incidence of postoperative complications?

A) pH of 7.46
B) PaO₂ of 69 mm Hg
C) PaCO₂ of 59 mm Hg
D) COHb of 4.5%

Question 12

Spirometric tracings that are acceptable for determining respiratory impairment for disability must be recorded at a paper speed of _____ mm/sec and volume sensitivity of _____ mm/L.

A) 10;20
B) 20;10
C) 20;20
D) 50;20

Question 13

The forced oscillation technique measures:

A) Respiratory system resistance
B) Airway resistance
C) Airway compliance
D) Respiratory system compliance

Question 14

What is the upper limit of normal cutoff for exhaled nitric oxide in adults?

A) 15 ppb
B) 25 ppb
C) 35 ppb
D) 45 ppb

Question 15

A subject performing an exhaled nitric oxide test has the following results: The technologist should do which of the following?

A) Report the mean of the two trials.
B) Report the largest trial.
C) Perform another maneuver because there are two acceptable trials only.
D) Recalibrate the instrument.

Question 16

The mathematical function fast Fourier transform is used in which testing modality?

A) Respiratory inductive plethysmography
B) Forced oscillatory technique
C) Eucapnic voluntary hyperventilation
D) Nitric oxide analysis

Question 17

What type of analyzer is used in a nitric oxide measuring device?

A) Thermoconductivity
B) Polarographic
C) Infrared
D) Chemoluminescent

Question 18

A patient with COPD has been difficult to wean from mechanical ventilation.To minimize CO₂ production,the caloric intake of the patient should consist mainly of:

A) Protein
B) Carbohydrate
C) Fat
D) Glucose

Question 19

What does an elevated exhaled nitric oxide represent?

A) Increased airway muscle tone
B) Airway inflammation
C) Pulmonary vascular hypertension
D) Pulmonary edema

Question 20

Which of the following patients would be at greatest risk for postoperative complications after a lung resection?

A) A patient with FEV₁ of 1.65 L
B) A patient with MVV of 74% of predicted
C) A patient with PaCO₂ of 35 mm Hg
D) A patient with O₂max of 9 ml/min/kg

Question 21

The following preoperative pulmonary function results were obtained on a 65-inch,60-year-old Caucasian female before a lung resection: Which of the following should the technologist recommend?

A) Repeat spirometry in 1 week.
B) Administer a bronchodilator.
C) Proceed with the lung resection.
D) Measure the arterial pressure.