Respiratory disorders: Oxygen Therapy

Question 1

Hypoxemia strictly refers to inadequate oxygenation of arterial blood and is defined as a PaO2 less than __ mmHg.

Answer 1

80 mmHg

Question 2

What are causes of hypoxemia?

Answer 2

Hypoventilation, ventilation-perfusion mismatch, diffusion impairment, decreased oxygen content of inspired air, and inertia pulmonary shunt

Question 3

What are some methods of oxygen administration?

Answer 3

Humidification, flow-by, face mask, oxygen hood, oxygen cage, nasal prongs, or nasal and nasopharyngeal oxygen

Question 4

When placing a nasopharyngeal oxygen catheter, what structure is used to determine its length?

Answer 4

Ramus of the mandible

Question 5

What are possible complications of oxygen therapy?

Answer 5

It can lead to depression of the hypoxia respiratory drive and can result in severe hypoventilation and respiratory failure, especially in those patients with chronic respiratory disease and hypercapnia.

Oxygen toxicity can directly damage pulmonary epithelium leading to pulmonary edema.

Question 6

An fraction of inspired oxygen greater than ___% should not be administered for more than 24 - 72 hours.

Answer 6

More than 50%

Question 7

True or False: In neonates, oxygen therapy should be titrated to the lowest possible concentration.

Answer 7

True