A nurse is providing care for a client experiencing obstructive shock. Which of the following diagnoses should the nurse expect?

A. Cardiac tamponade: Obstructive shock occurs when there is mechanical obstruction to cardiac output, such as in cardiac tamponade, where fluid buildup in the pericardial sac compresses the heart. B. Ruptured aneurysm: A ruptured aneurysm causes hypovolemic shock due to massive blood loss, not mechanical obstruction. C. Third spacing: This refers to fluid shifting into interstitial spaces, contributing to hypovolemic or distributive shock, not obstructive shock. D. Myocardial infarction: MI results in cardiogenic shock, due to decreased cardiac pump function, not obstruction to flow.