Final answer:
The most appropriate action in a situation where a patient has collapsed and there is a legal DNR order is to respect the order. However, if contested by the family, contacting medical control for guidance while providing basic support is advised until further direction is provided.
Step-by-step explanation:
The most appropriate action to take when encountering a patient with a Do Not Resuscitate (DNR) order would be to respect the legal DNR order. If the patient is confirmed to be pulseless and apneic, and there is a valid legal DNR signed by the physician, the orders within should be followed. However, the scenario described involves family members who are distraught and requesting that resuscitation efforts be ignored in favor of attempting resuscitation. In such a contentious situation, the best course of action may be to contact medical control for guidance while providing basic life support measures, such as opening the airway, until a decision is made by the appropriate legal and medical authorities. If medical control confirms that the DNR should be adhered to, then all resuscitation efforts should cease in accordance with the patient's wishes as legally documented in the DNR order.