One of the important signs that a nurse would observe in hypovolemic shock is?

SCTIMST Staff Nurse - 2015 (Set-A)

Medical & Surgical Nursing

Medium

Appeared in: SCTIMST Staff Nurse - 2015 (Set-A)

Explanation

Oliguria, defined as a urine output of less than 0.5 mL/kg/hr, is a key early sign of hypovolemic shock.
It directly reflects decreased renal perfusion, which occurs as the body's compensatory mechanisms shunt blood away from the kidneys to preserve vital organs like the heart and brain.
Unlike blood pressure, which drops late in shock, urine output is a sensitive and early indicator of inadequate circulatory volume.
For nurses, monitoring hourly urine output is a critical tool to assess the severity of shock and the patient's response to fluid resuscitation.

Option A: Hypotension (low blood pressure) is a late and ominous sign of hypovolemic shock. It occurs after the body's compensatory mechanisms, such as tachycardia and vasoconstriction, have failed. Relying on hypotension to diagnose shock can lead to dangerous delays in treatment.
Option B: While tachypnea (rapid breathing) is an early compensatory sign in shock, it is highly non-specific. Many other conditions, such as pain, anxiety, fever, and primary respiratory disorders, can also cause tachypnea, making it less reliable as a sole indicator of hypovolemic shock.
Option D: Cyanosis, a bluish discoloration of the skin and mucous membranes, is a very late sign of hypovolemic shock. It signifies severe tissue hypoxia and impending circulatory collapse. By the time cyanosis appears, the patient is in a critical, often irreversible, state.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Assessment and recognition of signs of hypovolemic shock in acute care settings.
Nurses must initiate hourly urine output monitoring via a Foley catheter in any patient suspected of shock. This is a key parameter for guiding the rate and volume of fluid resuscitation.
The therapeutic goal in shock resuscitation is often to titrate fluid administration to maintain a urine output greater than 0.5 mL/kg/hr, which indicates adequate renal and systemic perfusion.
What if? If the patient with hypovolemic shock also had congestive heart failure, fluid resuscitation would need to be much more cautious. The nurse would need to monitor for signs of fluid overload, such as crackles in the lungs and rising jugular venous pressure, as aggressive fluid administration could precipitate pulmonary edema.

How to Approach the Question

First, analyze the question to identify the core concept: 'important signs' of 'hypovolemic shock' from a nursing perspective.
This implies looking for a sign that is not only present but also a reliable indicator for assessment and monitoring.
Recall the pathophysiology of shock. The body compensates for volume loss by activating the sympathetic nervous system, leading to vasoconstriction and shunting of blood from non-vital organs (skin, gut, kidneys) to vital organs (heart, brain).
Evaluate each option based on its timing (early vs. late) and specificity.
Hypotension and cyanosis are late signs, indicating that compensation is failing.
Tachypnea is an early sign but is non-specific.

Concept Tested & Keywords

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