Reversible cause of dementia is?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Medical & Surgical Nursing

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Explanation

Hydrocephalus, specifically Normal Pressure Hydrocephalus (NPH), is a key reversible cause of dementia.
NPH is caused by an accumulation of cerebrospinal fluid (CSF) in the brain's ventricles, which puts pressure on brain tissue.
The cognitive and physical symptoms of NPH can often be significantly improved or reversed by surgically placing a shunt to drain the excess CSF.
The classic symptoms include a triad of gait disturbance, cognitive decline (dementia), and urinary incontinence.

Option A: Dementia following encephalitis (inflammation of the brain) is due to permanent, irreversible damage to neurons caused by the infection or inflammatory process.
Option B: Multi-infarct dementia is a form of vascular dementia. It results from the cumulative damage of multiple small strokes, which cause irreversible death of brain tissue.
Option D: Senile dementia is an outdated term that typically refers to Alzheimer's disease, the most common cause of dementia. Alzheimer's is a progressive neurodegenerative disease and is irreversible.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Differentiating between reversible and irreversible causes of dementia as background academic context rather than a clinical decision trigger.
Identifying potentially reversible causes of dementia, like NPH, is a critical nursing responsibility. Early recognition and referral can lead to treatment that dramatically improves a patient's quality of life.
Nurses play a key role in assessing for the classic triad of NPH symptoms: gait changes ('wobbly'), urinary incontinence ('wet'), and cognitive decline ('wacky').
Post-operative care for a VP shunt requires vigilant monitoring for signs of infection (fever, redness) and shunt malfunction (headache, vomiting, return of symptoms), which must be reported immediately.

How to Approach the Question

First, understand the question's core concept, which is 'reversible dementia'. This means a condition where the cognitive decline can be treated and potentially reversed.
Next, evaluate each option based on its underlying pathology.
Recall or deduce whether the damage caused by each condition is permanent or correctable.
Post-encephalitis and multi-infarct dementia involve irreversible death of brain cells.
Senile dementia (Alzheimer's) is a progressive, irreversible neurodegenerative process.
Hydrocephalus involves a 'plumbing' problem (excess fluid) that can be mechanically corrected with a shunt, thus reversing the symptoms. This makes it the correct choice.

Concept Tested & Keywords

Concept Tested: Differentiating between reversible and irreversible causes of dementia.
Stem keywords: Reversible cause, dementia
Lead-in keywords: is

QotSqr4CXJp_AVlmi-Z-L2

E6 Medicine Harrison 22e Part 1 p. 235-237

E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) p. 778-780