**Question:** In managing cardiac arrest patient the sequence from A-B-C to C-A-B was changed in which year?

**Core Concept:** The sequence of steps in managing a cardiac arrest patient is crucial for optimizing survival outcomes. The sequence A-B-C refers to Airway, Breathing, and Circulation, while C-A-B represents Cardiac, Airway, and Breathing. This change aims to improve patient care and outcomes.

**Why the Correct Answer is Right:** The correct answer, "C-A-B," was introduced in 1990 during the development of the American Heart Association (AHA) Guidelines for Cardiopulmonary Resuscitation (CPR). This change was made to prioritize chest compressions (Cardiac), ensuring blood flow to vital organs, over airway management (Airway) initially. Breathing (Breathing) is still addressed, but after chest compressions are initiated.

**Why Each Wrong Option is Incorrect:**

A. This option represents the original sequence, A-B-C, which does not prioritize chest compressions.
B. This option represents the original sequence, A-B-C, which does not prioritize chest compressions.
C. This option represents the original sequence, A-B-C, which does not prioritize chest compressions.
D. This option represents a different sequence, but still prioritizes airway management before cardiac interventions.

**Why the Correct Answer is Right:**

The correct answer, "C-A-B," was introduced to improve patient outcomes by focusing on chest compressions first, ensuring blood flow to vital organs, and then addressing airway management. Prioritizing airway management initially, as in the original sequence A-B-C, could lead to inadequate blood flow and reduced brain oxygenation, negatively affecting patient survival chances.

**Why Each Wrong Option is Incorrect:**

A. Prioritizing airway management over cardiac interventions may result in inadequate blood flow to vital organs, negatively impacting survival chances.
B. Prioritizing airway management over cardiac interventions may result in inadequate blood flow to vital organs, negatively impacting survival chances.
C. Prioritizing airway management over cardiac interventions may result in inadequate blood flow to vital organs, negatively impacting survival chances.
D. Prioritizing airway management does not address the core issue of restoring blood flow to vital organs first, which is essential for improving survival chances.

**Clinical Pearl:**

During cardiac arrest, early and effective chest compressions are crucial for restoring blood flow to vital organs and increasing the chances of survival. The American Heart Association (AHA) guidelines now recommend the C-A-B sequence to address this crucial aspect first, followed by airway management and breathing interventions. This change in sequence improves survival rates and minimizes the risk of inadequate blood flow to vital organs due to initial focus on airway management.