ATI RN
Oxygenation NCLEX Questions Quizlet Questions
Question 1 of 5
If air is breathed at 14000 ft where the barometric pressure is 450 mmHg, the alveolar oxygen tension will be:
Correct Answer: A
Rationale: PAO₂ = FiO₂ (PB - PH₂O) - (PaCO₂ / RQ). At 14,000 ft, PB = 450 mmHg, PH₂O = 47 mmHg, FiO₂ = 0.21, PaCO₂ = 40 mmHg, RQ = 0.8. PAO₂ = 0.21 (450 - 47) - (40 / 0.8) = 35 mmHg.
Question 2 of 5
Calculate the functional residual capacity (FRC) from the following results: TLC=5750 ml, IRV=3000 ml, Vt=500 ml, RV 1200 ml
Correct Answer: D
Rationale: FRC = RV + ERV. Since ERV isn't given, FRC = TLC - (IRV + Vt) = 5750 - (3000 + 500) = 2250 ml.
Question 3 of 5
What method can be used to identify a virus?
Correct Answer: D
Rationale: Serological testing (e.g., antibody detection) identifies viruses, unlike staining or antibiotic tests suited for bacteria.
Question 4 of 5
A nurse is beginning to conduct a health history for a patient with respiratory problems. He notes that the patient is having respiratory distress. What would the nurse do next?
Correct Answer: D
Rationale: In respiratory distress, immediate intervention to relieve symptoms takes priority over continuing the health history.
Question 5 of 5
Which of the following statements accurately describe a step for inserting an oropharyngeal airway? Select one that doesn't apply.
Correct Answer: C
Rationale: Correct steps include sizing the airway, measuring to the jaw angle, opening the mouth, and inserting with the tip up, then rotating 180° (not 360°).