The nurse administers naloxone to a client with opioid-induced respiratory depression. One hour later, nursing assessment reveals that the client has a respiratory rate of 4 breaths/minute, oxygen saturation of 75%, and is unable to be aroused. Which action should the nurse implement?

A. Initiate cardiopulmonary resuscitation (CPR): CPR is indicated only if the client is unresponsive and has no pulse or signs of circulation. In this case, the client has a very low respiratory rate but no mention of absent pulse, so CPR is not the immediate next step. B. Administer a second dose of naloxone: Naloxone has a shorter duration of action than many opioids, so respiratory depression can recur after initial reversal. Administering a second dose is essential to reverse ongoing opioid effects and improve respiratory status. C. Determine Glasgow Coma Scale score: While assessing neurological status is important, immediate intervention to address severe respiratory depression takes priority. Measuring GCS does not directly improve breathing or oxygenation. D. Prepare to assist with chest tube insertion: Chest tube insertion is used to treat conditions like pneumothorax, which is unrelated to opioid overdose. This action is inappropriate for opioid-induced respiratory depression.