What is the most common cause of death due to diarrhoea?

UPUMS Nsg.Officer-2024

Medical & Surgical Nursing

Medium

Appeared in: UPUMS Nsg.Officer-2024

Explanation

Diarrhea causes a massive loss of water and electrolytes (like sodium, potassium, and bicarbonate) from the body.
This rapid fluid loss leads to dehydration, which is the depletion of the body's total water content.
In severe dehydration, the volume of circulating blood decreases significantly (hypovolemia).
This leads to a drop in blood pressure and inadequate oxygen supply to vital organs, a condition known as hypovolemic shock.
Hypovolemic shock can quickly result in multi-organ failure (especially kidney failure) and death if not treated urgently with fluid replacement.

Option B: Vomiting is a symptom that often accompanies diarrhea and contributes to fluid loss, but it is not the ultimate cause of death. The fatal outcome is due to the severe dehydration that results from the combined fluid losses from both vomiting and diarrhea.
Option C: Lethargy is a clinical sign of severe dehydration and systemic illness. It indicates central nervous system depression due to fluid and electrolyte imbalances but is a symptom or consequence, not the direct cause of death.
Option D: Abdominal pain is a common symptom associated with the underlying gastrointestinal infection or inflammation causing the diarrhea. While it can be severe, it is not a direct cause of mortality from a typical diarrheal illness.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiological consequences and primary cause of mortality in acute diarrhea as background academic context rather than a clinical decision trigger.
The cornerstone of managing acute diarrhea is preventing and treating dehydration. This is a primary nursing responsibility.
Nurses must be proficient in assessing for signs of dehydration, especially in high-risk populations like infants, children, and the elderly.
Oral Rehydration Therapy (ORT) using Oral Rehydration Solution (ORS) is a simple, cost-effective, and life-saving intervention that nurses can administer and teach families to use.

How to Approach the Question

First, identify the core physiological process in the question, which is diarrhea.
Recall the primary definition and consequence of diarrhea: it is the loss of large amounts of fluid and electrolytes.
Analyze the given options to determine their relationship to this core process.
Recognize that vomiting, lethargy, and abdominal pain are either contributing factors (vomiting) or symptoms/consequences (lethargy, pain) of the illness or the dehydration itself.
Trace the primary effect (fluid loss) to its most direct and life-threatening outcome. Massive fluid loss is, by definition, dehydration.
Conclude that severe dehydration leads to circulatory collapse (shock) and is therefore the most common and direct cause of death.

Concept Tested & Keywords

Concept Tested: Pathophysiological consequences and primary cause of mortality in acute diarrhea.
Stem keywords: diarrhoea, death, cause
Lead-in keywords: most common
Negative lead-in flag: false

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