ATI RN
Oxygen Cycle Questions and Answers Questions
Question 1 of 4
The most common cause of COPD is:
Correct Answer: C
Rationale: Smoking tobacco is the leading cause of COPD, accounting for the majority of cases.
Question 2 of 4
Calculate the oxygen index for a neonate with the following: ABG - pH 7.21, PaCO₂ 65, HCO⁴‚ƒ 20, PaO₂ 40, HFOV - MAP 18, Hz 10, Amp 30, I:E 1:2, FiO₂ 0.80, HR 145, BP 70/40, SpO₂ 88%
Correct Answer: D
Rationale: OI = (MAP x FiO₂ x 100) / PaO₂ = (18 x 0.80 x 100) / 40 = 36.
Question 3 of 4
In what age group would a nurse expect to assess the most rapid respiratory rate?
Correct Answer: D
Rationale: Infants have the highest respiratory rate (30-60 breaths/min) due to their smaller lung capacity and higher metabolic demand.
Question 4 of 4
What is the rationale for placing a writing board in the room of a patient who has had surgery to insert a tracheostomy tube?
Correct Answer: A
Rationale: A tracheostomy bypasses the vocal cords, preventing speech, so a writing board aids communication.