ATI RN
Oxygen Questions and Answers PDF Questions
Question 1 of 5
What is the recommended absolute humidity for inspired gases in mechanically ventilated patients?
Correct Answer: C
Rationale: The recommended absolute humidity for mechanically ventilated patients is 30-44 mg H₂O/L to mimic physiological conditions and prevent airway drying.
Question 2 of 5
Which of the following factors does NOT affect the rate of oxygen diffusion across the alveolar membrane?
Correct Answer: D
Rationale: Pulmonary artery pressure affects blood flow, not the diffusion rate of oxygen across the alveolar membrane, which depends on pressure gradient, thickness, and surface area.
Question 3 of 5
What is the first line of treatment for OSA?
Correct Answer: D
Rationale: CPAP (continuous positive airway pressure) is the first-line treatment for obstructive sleep apnea, maintaining airway patency.
Question 4 of 5
Determine the alveolar deadspace volume given the following information: PaCO₂=40 mmHg PECO₂=30 PETCO₂=35 mmHg VT=500 ml
Correct Answer: C
Rationale: Alveolar deadspace = VT x (PaCO₂ - PETCO₂) / PaCO₂ = 500 x (40 - 35) / 40 = 125 ml.
Question 5 of 5
A newborn infant is evaluated using the Apgar scoring system. The infant has a heart rate of 120 beats per minute, flexion of the extremities, cries vigorously, pulls away from suctioning, and is acrocyanotic. What is the Apgar score for this newborn?
Correct Answer: C
Rationale: HR >100 = 2, cries = 2, flexion = 2, pulls away = 2, acrocyanosis = 1; total = 9.