Answer :
Final answer:
The correct action is to call a code blue and initiate resuscitation measures due to Ms. Lee's unresponsiveness and potential serious postpartum complications.
Explanation:
Upon Ms. Lee becoming unresponsive after recently giving birth and exhibiting signs of chest heaviness and shortness of breath, the most appropriate action is B) Call a code blue and initiate resuscitation measures. Ms. Lee’s symptoms suggest she may be experiencing a serious complication such as postpartum hemorrhage, eclamptic seizure, or even a cardiac event, all of which necessitate immediate medical attention. Since she has had recent high blood pressures and is on magnesium sulfate, preeclampsia complications must be considered. Administering another dose of magnesium sulfate (A) without assessing the cause of unresponsiveness could be dangerous if her symptoms are due to magnesium overdose. Starting an antihypertensive medication (C) does not address the acute change in her clinical status. While placing Ms. Lee in a lateral position (D) can assist in airway management, it is not the primary action needed when she is unresponsive and potentially experiencing a life-threatening event.