ATI RN
Nursing Questions on Oxygenation Questions
Question 1 of 5
What Specific gravity lab result is compatible with a dehydrated client?
Correct Answer: C
Rationale: A specific gravity of 1.039 indicates concentrated urine, consistent with dehydration (normal range: 1.010-1.030).
Question 2 of 5
Which of the following statement regarding the physical principles governing humidifiers is correct?
Correct Answer: B
Rationale: Greater surface area increases the contact between gas and water, enhancing evaporation, which is a fundamental principle of humidifier function.
Question 3 of 5
A patient on mechanical ventilation shows an increase in PIP from 20 to 40 cmH₂O while static compliance remains relatively unchanged. Which of the following is most likely to be the cause?
Correct Answer: B
Rationale: Increased PIP with unchanged static compliance suggests increased airway resistance (e.g., bronchospasm or mucus), as compliance reflects lung stiffness, not airflow obstruction.
Question 4 of 5
During inhalation, which muscle contracts to expand the thoracic cavity?
Correct Answer: A
Rationale: The diaphragm is the primary muscle of inhalation, contracting to expand the thoracic cavity.
Question 5 of 5
What changes are consistent with a COPD exacerbation?
Correct Answer: A
Rationale: Increased mucus production is a hallmark of COPD exacerbation, while domed diaphragms (chronic) and vesicular sounds (normal) are not specific to exacerbations.