A patient has been admitted to the emergency department for a suspected drug overdose. His respirations are shallow, with an irregular pattern, at a rate of 12 respirations per minute. The nurse interprets this respiration pattern as which of the following?

A. Bradypnea: Characterized by a regular but abnormally slow respiratory rate, typically fewer than 12 breaths per minute in adults. While the patient’s respiratory rate is 12, the irregular pattern and shallow depth suggest a different pattern rather than simple bradypnea. B. Agonal respirations: Marked by gasping, labored breaths often seen in severe hypoxia or nearing death. This pattern is typically irregular and associated with brainstem dysfunction, which is not described in this case. C. Chronic obstructive breathing: Seen in patients with COPD, involving prolonged expiration due to airway obstruction. The patient’s case does not mention an obstructive pattern but rather shallow and irregular respirations. D. Hypoventilation: Defined by shallow, irregular breathing that leads to inadequate alveolar ventilation, commonly caused by drug overdose, particularly opioids or sedatives. The patient’s presentation of shallow and irregular respirations fits this pattern.