Features of neurogenic shock are
**Core Concept**
Neurogenic shock is a type of shock that occurs due to a disruption in the sympathetic nervous system, leading to unopposed parasympathetic activity and a subsequent decrease in vascular tone. This condition is often seen in patients with severe spinal cord injuries, particularly those with cervical or high thoracic lesions.
**Why the Correct Answer is Right**
Neurogenic shock is characterized by a loss of vasomotor tone, hypotension, and bradycardia. The sympathetic nervous system, which is responsible for increasing heart rate and blood pressure, is impaired, allowing the parasympathetic nervous system to dominate. This results in decreased peripheral vascular resistance, leading to a drop in blood pressure. Additionally, the loss of sympathetic tone can lead to a decrease in cardiac output. The clinical features of neurogenic shock include hypotension, bradycardia, warm and well-perfused skin, and a normal or elevated respiratory rate.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe the features of neurogenic shock. Neurogenic shock is not typically associated with a high fever or tachycardia.
**Option B:** This option is incorrect as it does not accurately describe the features of neurogenic shock. Neurogenic shock is not typically associated with a low respiratory rate or decreased urine output.
**Option C:** This option is incorrect as it does not accurately describe the features of neurogenic shock. Neurogenic shock is not typically associated with a high blood pressure or a low cardiac output.
**Clinical Pearl / High-Yield Fact**
A key distinguishing feature of neurogenic shock is the presence of warm and well-perfused skin, which is in contrast to hypovolemic shock where the skin is typically cool and clammy. This is because the parasympathetic nervous system dominates in neurogenic shock, causing vasodilation and increased blood flow to the peripheral tissues.
**Correct Answer: A. Features of neurogenic shock include hypotension, bradycardia, warm and well-perfused skin, and a normal or elevated respiratory rate.**