Shock that results from dilated blood vessels may be caused by which of the following?

• A. Obstructive shock
• B. Neurogenic shock
• C. Hypovolemic shock
• D. Cardiogenic shock

Answer: (B)

Verified step by step guidance

1. Understand the concept of shock: Shock is a life-threatening condition where the circulatory system fails to deliver adequate oxygen and nutrients to tissues. It can result from various causes, including blood vessel dilation, blood loss, or heart dysfunction.
2. Learn about neurogenic shock: Neurogenic shock occurs due to the loss of vascular tone caused by damage to the nervous system, such as spinal cord injury. This leads to widespread vasodilation, reducing blood pressure and impairing circulation.
3. Differentiate between types of shock: Obstructive shock is caused by physical obstruction of blood flow (e.g., pulmonary embolism), hypovolemic shock results from severe blood or fluid loss, and cardiogenic shock is due to heart failure. None of these involve widespread vasodilation as the primary mechanism.
4. Focus on the mechanism of vasodilation: Neurogenic shock is the only type listed that directly involves dilated blood vessels as a result of nervous system dysfunction. This distinguishes it from other types of shock.
5. Conclude the reasoning: Based on the mechanism of action, neurogenic shock is the correct answer because it is specifically caused by dilated blood vessels due to nervous system impairment.