Classic symptoms of dehydration include all except?

IGNOU Post B. SC. Nursing entrance-2019

Medical Surgical Nursing

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Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

Dizziness is a symptom of progressing dehydration, not a classic early sign.
It is typically caused by orthostatic hypotension, which is a drop in blood pressure upon standing due to reduced circulating blood volume.
This hemodynamic instability occurs in moderate to severe dehydration, whereas other signs like thirst appear much earlier.

Option A: Passing small amounts of urine (oliguria) is a classic sign of dehydration. The kidneys conserve water to compensate for fluid loss, leading to reduced urine production.
Option C: Dark-coloured urine is a classic sign of dehydration. With less water available, the urine becomes more concentrated with waste products like urea, giving it a darker yellow or amber color.
Option D: Thirst is the earliest and most classic symptom of dehydration. It is the body's primary mechanism, controlled by the hypothalamus, to signal the need for fluid intake when plasma osmolality increases.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical signs and symptoms of dehydration as background academic context rather than a clinical decision trigger.
Nurses must be vigilant in assessing for dehydration, especially in vulnerable populations like infants, children, and the elderly, who may not be able to communicate thirst effectively.
Key nursing assessments include monitoring intake and output, daily weights (the most accurate measure of fluid status), checking skin turgor, assessing mucous membranes, and monitoring vital signs for tachycardia or hypotension.
What if? If the patient is an older adult with a naturally diminished thirst sensation, the nurse cannot rely on thirst as an early indicator. In this case, objective signs like changes in urine output, new-onset confusion, or orthostatic dizziness become critical for early detection.

How to Approach the Question

First, identify the negative keyword 'except'. This means you are looking for the option that is NOT a classic symptom of dehydration.
Review each option and evaluate its relationship to the pathophysiology of dehydration.
Recall that the body's first response to fluid loss is to conserve water (leading to less, darker urine) and stimulate fluid intake (thirst).
Consider symptoms that arise from secondary complications, such as reduced blood volume affecting blood pressure (dizziness).
The symptom that occurs at a later stage or is less universally present in early dehydration will be the correct answer.

Concept Tested & Keywords

Concept Tested: Clinical signs and symptoms of dehydration.
Stem keywords: dehydration, classic symptoms
Lead-in keywords: except
Negative lead-in flag: Question asks for the exception, meaning three options are classic symptoms and one is not.

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