Chapter 33 Exacerbations of Chronic Bronchitis

Question 1

Why does bronchodilators not work in acute treatment for inflammatory airway disease?

Answer 1

• There is no active bronchoconstriction

* The effect of the drug will not be immediate

Question 2

Should drugs promoting drying of the airways be given or discontinued in animals with airway mucus obstruction?

Answer 2

Discontinued. The mucus obstruction required liquidification to be able to resolve.

Question 3

T/F NAC nebulization can be helpful as a mucolytic in airway mucus obstruction?

Answer 3

No it can cause toxicity and bronchoconstriction

Question 4

T/F It is very unusual to have endocarditis and not have a heart murmur?

Answer 4

False. Up to 40% of dogs with endocarditis does not have a heart murmur.

Question 5

What are the most common clinical sign of pulmonary hypertension?

Answer 5

Syncope

Question 6

What does the modified Bernoulli equation tell us (∆P = 4 × velocity2)

Answer 6

The degree of pulmonary hypertension

Question 7

Explain why placing oxygen therapy can worsen the situation for an obese dog with “Obesity hypoventilation syndrome”

Answer 7

Chronic elevations of CO2 —> central chemoreceptors are insensitive to elevations in CO2 and ventilation —> hypoxemia becomes the main drive for respiration —> Oxygen therapy removes with hypoxic drive —> respiratory failure can occur.