Pulmonary Resistance & Function Testing

1.

1 point

Assuming a constant flow and peak pressure, what affect would a decrease in the plateau pressure of a respiratory cycle have on the airway resistance?

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2.

1 point

A 65 year old with COPD is in the ER with the following arterial blood gas:
ABG: ph=7.56, PaCO2=20mmHg, PaO2=125mmHg.
The patient is hypoxemic due to:

Acute respiratory acidosis

Acute respiratory alkalosis

Metabolic acidosis

Metabolic alkalosis

Chronic respiratory alkalosis

None of the above

3.

1 point

A climber on the top of Mt. McKinley is breathing from a tank of 90% O2. To celebrate her summit, she removes her mask and inspires the cool mountain air. What would the flow through her airways during inspiration be compared to yours, sitting in Dahlgren library studying?

Equal flow

More flow

Less flow

Can't tell from the data given

4.

1 point

True or False: A severely asthmatic teenager would have a more restrictive choke point than a healthy teenager.

True

False

5.

1 point

An older woman comes into your office with a previous diagnosis of pulmonary fibrosis. Which of the the following results of a FVC maneuver would be normal for this patient?

110%

80%

60%

95%

6.

1 point

A young man comes into your office with a history of severe asthma. Which of the the following results of a FVC maneuver would be normal for this patient?

80%

75%

60%

95%

7.

1 point

True or False: After maximal bronchoprovocation, Michael Phelps' FEV1 decreases from 4L to 3.4L. He should be diagnosed with asthma.

True

False

8.

1 point

Which of the following does NOT affect the ratio of the results of an FVC maneuver?

gender

age

ethnicity

height

none of the above

9.

1 point

The severity of an obstructive lung disease is based on:

change in TLC

absolute FVC

absolute FEV1

none of these

FEV1/FVC ratio

10.

1 point

In which division of the lung would you find the most turbulent flow?

Trachea

Second bronchioloar division

Primary Bronchi

Alveolar ducts

First bronchiolar division

11.

1 point

True or False: The flow-volume loop for forced expiration is always effort independent.

True

False

12.

1 point

Which of the following does NOT lead to an increase in respiratory resistance?

Parasympathetic activation

Peep of zero on a ventilator

Beta agonist stimulation

Breathing in 50% O2: 50% Ne

13.

1 point

In which disease(s) would you expect a decreased tidal volume?
I: Pulmonary Fibrosis
II: Pneumonia
III: Asthma
IV: Pneumothorax

I only

I, IV

III, IV

II, III

I, II, IV

All of the above

14.

1 point

Which of the following gas mixtures would cause the MOST turbulent flow?

90% O2: 10% He2

50% O2: 50% He2

90% O2: 10% N2

50% O2: 50% CO2

15.

1 point

A climber on the top of Mt. McKinley is breathing from a tank of 90% O2. To celebrate her summit, she removes her mask and inspires the cool mountain air. What would the RESISTANCE of her airways during inspiration be compared to yours, sitting in Dahlgren library studying?

Greater

Less

The same

Cannot tell from the data given.

16.

1 point

In a person with an exothoracic tracheal tumor, where would you expect the flow-volume curve to plateau?

Upon expiration

Upon inspiration

Flow volume curves don't plateau.

Both inspiration and expiration

17.

1 point

A patient with the following baseline PFT values comes into your office:
FVC: 2.0L FEV1:1.0L
After treatment with bronchodilators, which of the following would indicate reversibility?

FEV1=1.12L

FVC=2.12L

FEV1=1.10L

FVC=2.2L

18.

1 point

True or False: Anemia ALWAYS leads to hypoxia.

True

False

19.

1 point

Which of the following patients would have the smallest pulmonary time constant?

Healthy

Pulmonary fibrotic

Asthmatic

Chronic Bronchitic

20.

1 point

In which pathologic state would you expect a normal FEV1/FVC ratio?
I: Very Severe Chronic Bronchitis
II: Pulmonary Fibrosis
III: Pneumothorax
IV: Mild Asthma

All of the above

IV only

II, III, IV

None of the above

I, IV

II, III

21.

1 point

Which of the following would NOT cause a decrease in the diffusion capacity of carbon monoxide across the alveolar membrane?

Emphysema

Lung resection

Interstitial lung disease

Anemia

Pulmonary hypertension

Pulmonary embolism

Chronic bronchitis

Pulmonary Fibrosis

22.

1 point

How would you describe the flow-volume loop for a patient with COPD?

Tall and concave

Concave

Concave and narrow

Tall and narrow