Dengue shock syndrome is characterized by all of the following except?

SCTIMST Staff Nurse - 2016

Medical & Surgical Nursing

Medium

Appeared in: SCTIMST Staff Nurse - 2016

Explanation

Dengue Shock Syndrome (DSS) is defined by severe plasma leakage from capillaries, which is the core pathophysiological event.
This loss of plasma fluid into tissues (like the pleural space) causes the remaining blood to become more concentrated, a state known as hemoconcentration.
Hemoconcentration is measured by a significant rise in hematocrit (often greater than 20% from baseline) and, consequently, an increase in hemoglobin levels.
A decreased hemoglobin level is the opposite of what is expected in the initial stages of DSS and would typically only occur later if complicated by severe hemorrhage.
Therefore, decreased hemoglobin is not a defining characteristic of DSS and is the correct exception.

Option A: Hepatomegaly, or liver enlargement (typically more than 2 cm below the costal margin), is a very common clinical finding and is considered a key warning sign for progression to severe dengue.
Option B: Pleural effusion is a direct and classic sign of the severe plasma leakage that defines DSS. Fluid accumulates in the space around the lungs and is objective evidence of increased vascular permeability.
Option C: Thrombocytopenia, a rapid and significant drop in platelet count (to 100,000/μL or less), is a mandatory criterion for the diagnosis of Dengue Hemorrhagic Fever (DHF) and is a hallmark of DSS.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Clinical features of Dengue Shock Syndrome (DSS) in acute care settings.
Nurses must closely monitor patients with dengue for signs of plasma leakage and impending shock, especially during the critical phase (typically days 3-7 of illness).
Key nursing monitoring includes tracking serial hematocrit levels (a rising Hct is a major red flag), vital signs (tachycardia, narrowing pulse pressure), urine output, and observing for clinical signs of fluid accumulation (e.g., respiratory distress from pleural effusion).
Patient education is crucial; advise patients and family to watch for warning signs like severe abdominal pain, persistent vomiting, and any bleeding, and to seek immediate medical care if they occur.

How to Approach the Question

First, identify the negative framing of the question, indicated by the word 'except'. This means you are searching for the option that is NOT a feature of Dengue Shock Syndrome.
Recall the core pathophysiology of DSS: it is caused by widespread capillary (plasma) leakage.
Analyze the consequences of plasma leaking out of the blood vessels. The remaining blood becomes thicker or more concentrated (hemoconcentration), and fluid accumulates in body cavities (pleural effusion, ascites).
Evaluate each option against this core concept:
Hepatomegaly, Pleural effusion, and Thrombocytopenia are all well-established, classic features of severe dengue.
'Decreased haemoglobulin' implies blood dilution or significant blood loss. The primary process in DSS is hemoconcentration, which increases hemoglobin. This option directly contradicts the defining pathophysiology.

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