ATI RN
NCLEX Questions on Oxygenation and Perfusion Questions
Question 1 of 5
For every 1 LPM increase in oxygen to a low flow delivery device such as nasal prongs, the approximate FiO₂ will increase by:
Correct Answer: C
Rationale: With nasal prongs, each 1 LPM increase above room air (21%) adds approximately 4% to the FiO₂, so the correct answer is 4%.
Question 2 of 5
What chemical mediator is associated with type IV delayed hypersensitivity reactions?
Correct Answer: C
Rationale: Type IV hypersensitivity (delayed, cell-mediated) involves lymphokines (e.g., cytokines) released by T-cells, not histamine or bradykinin.
Question 3 of 5
Which of the following drugs is a combination medication that contains both a LABA and an inhaled corticosteroid?
Correct Answer: D
Rationale: Advair combines a LABA (salmeterol) and an inhaled corticosteroid (fluticasone) for asthma/COPD management.
Question 4 of 5
A patient with the following neurological assessment would score what on the Glasgow Coma Scale: Opens eyes to speech only, is orientated and obeys motor commands?
Correct Answer: C
Rationale: Eyes to speech = 3, orientated (verbal) = 5, obeys commands (motor) = 6; total GCS = 14.
Question 5 of 5
Which of the following is the correct ratio of chest compressions to breaths as per NRP?
Correct Answer: B
Rationale: The Neonatal Resuscitation Program (NRP) recommends a 3:1 compression-to-ventilation ratio for newborns.