ATI RN
Oxygen Questions and Answers PDF Questions
Question 1 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 2 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 3 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.
Question 4 of 5
A father of a preschool-aged child tells the nurse that his child has had a constant cold since going to daycare. How would the nurse respond?
Correct Answer: B
Rationale: Daycare increases exposure to viruses, leading to frequent colds, which is normal for young children building immunity.
Question 5 of 5
A student observes a nurse instilling a small amount of saline into a tracheostomy tube before suctioning. What should the student discuss with the nurse?
Correct Answer: B
Rationale: Current evidence shows saline instillation before suctioning is not recommended as it may dislodge bacteria or cause irritation.