Which statement is true about CPAP use in the described scenarios?

• A. CPAP is appropriate for a patient with slow, shallow respirations
• B. CPAP is appropriate for an apneic patient
• C. CPAP is not appropriate for a patient with slow, shallow respirations
• D. CPAP should be avoided in all drowning-related respiratory distress

Answer: (C)

CPAP works by delivering a constant positive pressure to the airways to keep alveoli open and improve oxygenation, but it does not provide breaths or increase the rate of breathing. In someone with slow, shallow respirations, ventilation is inadequate—air isn’t moving enough to remove carbon dioxide or properly oxygenate the blood. Adding CPAP in that situation doesn’t fix the ventilation problem and can raise intrathoracic pressure, which may reduce venous return and further compromise circulation. So CPAP isn’t appropriate for a patient who isn’t ventilating adequately.