AEMCA Practice Exam

What type of shock results from blockage of blood flow?

1. Cardiogenic shock

2. Distributive shock

3. Obstructive shock

4. Hypovolemic shock

The correct answer is: Obstructive shock

Obstructive shock is characterized by a blockage in the blood flow that prevents proper circulation. This type of shock can occur due to conditions such as pulmonary embolism, cardiac tamponade, or tension pneumothorax, where the heart or major vessels are obstructed, leading to a decrease in blood flow to vital organs. The result is that even though the heart may be working normally, the effectiveness of its pumping action is compromised due to the obstruction, causing inadequate blood circulation and a drop in blood pressure. In contrast, cardiogenic shock results from the heart's inability to pump effectively, often due to severe heart dysfunction. Distributive shock usually involves widespread vasodilation that can occur in conditions like sepsis, leading to inadequate blood flow due to poor distribution rather than blockage. Hypovolemic shock pertains to a significant loss of blood volume, either from trauma, dehydration, or other similar causes. Each of these alternative types of shock presents distinct mechanisms and underlying causes that do not involve the blockage specifically associated with obstructive shock.