The cardinal signs of cardiac arrest include all of the following except?

GMCH Chandigarh - 2022

Medical & Surgical Nursing

Easy

Appeared in: GMCH Chandigarh - 2022

Explanation

Cold, clammy skin is a sign of shock and widespread vasoconstriction due to poor perfusion, but it is not a primary diagnostic sign of cardiac arrest.
The cardinal signs for initiating resuscitation are unresponsiveness, absence of effective breathing (apnea or agonal gasps), and absence of a palpable central pulse.
While poor perfusion causes cold skin, this sign is not specific enough and can be present in many conditions other than cardiac arrest, making it unreliable for immediate diagnosis.

Option A: Apnoea, or the cessation of breathing, is a cardinal sign of cardiac arrest. It occurs because the respiratory centers in the brain are deprived of oxygenated blood.
Option B: Dilated and non-reactive pupils are a strong indicator of severe brain anoxia, which is a direct consequence of cardiac arrest. However, current BLS guidelines de-emphasize checking pupils to avoid delaying chest compressions.
Option D: The absence of a central pulse (carotid in adults, brachial in infants) is the most definitive sign of cardiac arrest, confirming the cessation of effective circulation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Recognition of the cardinal signs of cardiac arrest as background academic context rather than a clinical decision trigger.
Rapid recognition of cardiac arrest is critical. The assessment of breathing and pulse should take no more than 10 seconds to prevent any delay in starting life-saving chest compressions.
Nurses must be able to distinguish between signs of shock (like cold, clammy skin) and the definitive signs of cardiac arrest to initiate the correct emergency protocol (e.g., Rapid Response Team vs. Code Blue).
What if? If a patient is found with agonal gasps (ineffective, snoring, or gasping breaths), they should be treated as if they are not breathing. If no pulse is present, CPR must be started immediately as agonal breathing is a sign of cardiac arrest.

How to Approach the Question

First, identify the negative framing of the question with the word "except". This means you are looking for the option that is NOT a cardinal sign of cardiac arrest.
Recall the three primary signs used to diagnose cardiac arrest in an emergency setting: Unresponsiveness, Apnea (no breathing or only gasping), and Pulselessness.
Evaluate each option against these core signs.
Apnoea and Absence of pulse are core, cardinal signs.
Dilated pupils are a consequence of arrest but not a primary sign for initiating CPR.
Cold clammy skin is a sign of shock or hypoperfusion, which is less specific and not a primary diagnostic sign for the event of arrest itself.

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