Compression of bleeding carotid artery immediately leads to?

AIIMS Bhopal NO - 2018 (Shift-1st)

Medical Surgical Nursing

Hard

Appeared in: AIIMS Bhopal NO - 2018 (Shift-1st)

Explanation

The carotid arteries, specifically the internal carotid arteries, are the main conduits of blood to the anterior and middle portions of the brain.
Compressing a carotid artery drastically reduces cerebral blood flow, leading to acute ischemia (lack of oxygen) in the brain tissue.
A sudden loss of brain function caused by an interruption of blood flow is the definition of an ischemic stroke.
Therefore, a stroke is the most immediate and severe consequence of carotid artery compression.

Option A: While the ophthalmic artery, which supplies the eye, is a branch of the internal carotid artery, blindness (amaurosis fugax) is typically a symptom of transient ischemia or a smaller embolus. Complete compression of the main artery would cause a much larger brain injury (stroke) that would be the primary event.
Option B: The sense of smell is mediated by the olfactory nerves and bulb, which receive blood from branches of the anterior cerebral artery. This is too specific and small a territory to be the primary, immediate result of compressing the main carotid trunk.
Option D: Vomiting is a non-specific symptom. While it can occur during a stroke, especially if the brainstem or cerebellum is involved or if intracranial pressure rises, it is not the direct and immediate ischemic consequence of compressing the carotid artery.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Cerebrovascular Accidents (Stroke) as background academic context rather than a clinical decision trigger.
In an emergency, when controlling bleeding from a neck wound, direct pressure should be applied to the wound itself, not by compressing the entire carotid artery against the spine, to avoid causing a stroke.
Nurses must be aware of the dangers of carotid sinus massage (used to treat certain tachycardias), as it can cause bradycardia, hypotension, and, in patients with atherosclerosis, potentially dislodge a plaque leading to a stroke.
Recognizing the signs of a stroke (FAST: Face drooping, Arm weakness, Speech difficulty, Time to call emergency services) is a critical nursing skill, as immediate medical intervention can be lifesaving.

How to Approach the Question

First, identify the key anatomical structure in the question: the carotid artery.
Recall the primary function of this structure. The carotid arteries are the main blood supply to the brain.
Analyze the action being performed: 'compression'. This means obstructing blood flow.
Connect the action to its physiological consequence: Obstructing the brain's main blood supply will cause brain tissue to be deprived of oxygen.
Evaluate the options based on this consequence. A sudden deprivation of blood and oxygen to the brain is the definition of a stroke. The other options are either less direct, less severe, or symptoms of the primary event rather than the event itself.

Concept Tested & Keywords

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