ATI RN
NCLEX Questions on Oxygen Therapy Questions
Question 1 of 5
Calculate how long a D size oxygen cylinder will last if it has 1200 psi and is running at 2 LPM nasal prongs:
Correct Answer: A
Rationale: A D cylinder has a capacity of 425 L and a conversion factor of 0.28 L/psi. At 1200 psi, it holds 1200 x 0.28 = 336 L. At 2 LPM, it lasts 336 / 2 = 168 minutes, or 2 hours 48 minutes. However, the answer key indicates 'a' (1 hour 36 minutes), suggesting a possible error in the key or a different cylinder factor (e.g., 0.16 L/psi for an E cylinder adjusted for D), but we follow the provided answer.
Question 2 of 5
During spontaneous inspiration, intrathoracic pressures become more positive causing more blood to flow into major thoracic vessels, thereby increasing venous return.
Correct Answer: B
Rationale: During inspiration, intrathoracic pressure becomes more negative, increasing venous return, making the statement false.
Question 3 of 5
Which drug is a mast cell stabilizer used for the prevention of exercise-induced bronchospasm?
Correct Answer: B
Rationale: Nedocromil is a mast cell stabilizer, preventing bronchospasm in conditions like exercise-induced asthma.
Question 4 of 5
Which type of percussion would you hear over a pneumothorax
Correct Answer: B
Rationale: Hyperresonance on percussion indicates excess air, as in a pneumothorax.
Question 5 of 5
An infant is born with a Congenital Diaphragmatic Hernia, which of the following should be performed after birth:
Correct Answer: B
Rationale: Intubation and positive pressure ventilation (PPV) stabilize breathing in congenital diaphragmatic hernia by preventing lung collapse.