For which of the following medical diagnoses would obstructive shock be most likely seen?
1. tension pneumothorax
2. hemorrhage
3. carbon monoxide poisoning
4. cardiomyopathy
1
Rationale: Obstructive shock states are caused by a mechanical barrier to blood flow, which blocks oxygen delivery to tissues. Tension pneumothorax may cause a shift of mediastinal structures and compression of the opposite lung, which impedes venous return and serves as a barrier to oxygen delivery. Hemorrhage will cause loss of intravascular volume and may lead to a hypovolemic shock state. Carbon monoxide poisoning may lead to a transport shock state, and cardiomyopathy may lead to a cardiogenic shock state.
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