Assertion (A): Neurogenic shock is characterized by Bradycardia and dry warm skin.Reasons (R): It occurs due to vasodilation and loss of sympathetic tone in blood vessels.Choose the correct answer:

Appeared in: BHU NO - 12 April 2024

Explanation

Neurogenic shock is a type of distributive shock resulting from the loss of sympathetic nervous system tone, often after a spinal cord injury.
This loss of sympathetic signals leads to unopposed parasympathetic (vagal) activity, which slows the heart rate, causing bradycardia.
Simultaneously, the loss of sympathetic tone causes massive vasodilation (widening of blood vessels), leading to blood pooling in the periphery. This makes the skin warm and dry, as sympathetic pathways also control sweating.
Therefore, the reason (loss of sympathetic tone and vasodilation) is the direct cause of the assertion's characteristics (bradycardia and warm, dry skin).

Option A: This option incorrectly states that the reason is not the correct explanation. The loss of sympathetic tone and subsequent vasodilation are the direct pathophysiological mechanisms that produce the clinical signs of bradycardia and warm, dry skin.
Option B: This option incorrectly claims that the Reason (R) is incorrect. The statement that neurogenic shock occurs due to vasodilation and loss of sympathetic tone is the fundamental definition of its pathophysiology.
Option C: This option incorrectly claims that the Assertion (A) is incorrect. Bradycardia and warm, dry skin are the classic, albeit counterintuitive, signs that distinguish neurogenic shock from other shock states.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Pathophysiology of Neurogenic Shock in acute care settings.
A nurse must be able to differentiate neurogenic shock from other shock types. Mistaking the bradycardia for a stable condition or the warm skin for adequate perfusion can lead to delayed treatment and severe organ damage.
Immediate nursing interventions for suspected neurogenic shock include stabilizing the spine, administering IV fluids to manage hypotension, and potentially using vasopressors to counteract vasodilation and medications like atropine to manage severe bradycardia.
What if? If a patient with a recent traumatic injury presents with hypotension, tachycardia, and cool, clammy skin, the nurse should suspect hypovolemic shock (due to bleeding) rather than neurogenic shock. The treatment priority would be aggressive fluid and blood product resuscitation.

How to Approach the Question

First, evaluate the Assertion (A) for its factual accuracy. Is it true that neurogenic shock presents with bradycardia and warm, dry skin? Recall the unique characteristics of different shock types.
Next, evaluate the Reason (R) independently. Is it true that neurogenic shock is caused by vasodilation and loss of sympathetic tone? This requires knowledge of the underlying pathophysiology.
If both statements are true, assess the link between them. Does the reason (R) provide a direct and logical explanation for the assertion (A)? In this case, does the loss of sympathetic tone explain the specific symptoms mentioned?
Finally, select the option that accurately describes the relationship you've determined. Here, both are true, and R correctly explains A.

Concept Tested & Keywords

Concept Tested: Pathophysiology of Neurogenic Shock
Stem keywords: Neurogenic shock, Bradycardia, dry warm skin, vasodilation, loss of sympathetic tone
Lead-in keywords: Assertion (A), Reasons (R), correct explanation

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Practise the full BHU NO - 12 April 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.