ATI RN
Oxygen Cycle Questions and Answers Questions
Question 1 of 5
The nurse is browsing the chart of the patient and notes a normal serum lipase level. Which of the following is a normal serum lipase value?
Correct Answer: C
Rationale: Normal serum lipase levels are typically 0-160 U/L, with 200 U/L being an upper-normal value in some labs.
Question 2 of 5
Which of the following best describes a mode of ventilation where every breath is time or patient triggered, pressure targeted, and time cycled?
Correct Answer: B
Rationale: Pressure Control Ventilation (PCV) is time or patient triggered, pressure targeted, and time cycled, matching the description.
Question 3 of 5
Which of the following is responsible for producing surfactant?
Correct Answer: D
Rationale: Type II pneumocytes produce surfactant, reducing alveolar surface tension.
Question 4 of 5
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 5 of 5
You obtained an arterial blood gas sample from a patient who is hypothermic. In the ABG analyzer, you get a PO₂ of 85 mmHg. Which of the following could infer in your interpretation of this result?
Correct Answer: D
Rationale: ABG analyzers heat samples to 37°C, overestimating PaO₂ in hypothermic patients, requiring temperature correction for accuracy.