The early sign of post-operative shock can be assessed through:

AIIMS Delhi NO-2016

Medical & Surgical Nursing

Medium

Appeared in: AIIMS Delhi NO-2016

Explanation

An increased pulse rate (tachycardia) is the body's initial compensatory response to decreased circulating volume in early shock.
The sympathetic nervous system is activated to increase heart rate in an attempt to maintain stable cardiac output when stroke volume falls.
This physiological response occurs before blood pressure drops, making it the earliest and most reliable indicator among the choices.
A rapid, thready pulse is a classic sign of hypovolemic shock, a common post-operative complication.

Option B: A change in core body temperature is not a primary early sign of shock. Cool, clammy skin is a sign of peripheral vasoconstriction, but tachycardia precedes this as the initial compensatory action.
Option C: While delayed capillary refill is an early sign of decreased tissue perfusion, it is less reliable than pulse rate. It can be affected by external factors such as a cold operating room, peripheral vascular disease, or certain medications.
Option D: Changes in pupillary reaction are a very late and grave sign of shock. They indicate severe cerebral hypoxia (lack of oxygen to the brain) and progression to the irreversible stage of shock.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Assessment of early signs of post-operative shock as background academic context rather than a clinical decision trigger.
Nurses must prioritize frequent monitoring of pulse rate in the immediate post-operative period. A rising trend is a red flag.
A rising pulse rate, even with a stable blood pressure, is a critical finding that requires prompt investigation for potential bleeding or fluid loss and immediate reporting to the surgeon.
What if? If the patient is taking a beta-blocker medication (e.g., metoprolol), their heart rate response to shock will be blunted or absent. In this case, the nurse must rely more heavily on other subtle signs like restlessness, anxiety, cool skin, decreased urine output, and a narrowing pulse pressure as earlier indicators of shock.

How to Approach the Question

First, identify the keywords in the question: 'early sign' and 'post-operative shock'. This directs you to think about the body's initial compensatory mechanisms.
Recall the basic pathophysiology of shock. The body's first goal is to compensate for a drop in blood volume or cardiac output.
Consider the relationship: Cardiac Output = Heart Rate × Stroke Volume. When blood volume (and thus stroke volume) decreases, the body's fastest way to compensate is by increasing the heart rate.
Evaluate each option based on this timeline. An increased pulse rate (tachycardia) happens first as a compensatory measure.
A significant drop in blood pressure, changes in core temperature, and altered pupillary responses are all later signs that occur after the initial compensation begins to fail.

Concept Tested & Keywords

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