The commonest cause of Peripheral Neuropathy in developed countries is - - UPPSC 2023

UPPSC 2023

Medical & Surgical Nursing

Easy

Appeared in: UPPSC 2023

Explanation

Diabetes Mellitus (DM) is explicitly identified in medical literature as the most common cause of peripheral neuropathy in developed countries due to its high prevalence.
The primary mechanism is chronic hyperglycemia, which damages the small blood vessels (vasa nervorum) that supply nerves, leading to nerve ischemia and axonal degeneration.
Diabetic neuropathy classically presents as a distal symmetric polyneuropathy, often described with a 'stocking-glove' pattern of sensory loss.

Option B: Isoniazid is a medication used to treat tuberculosis. While it can cause peripheral neuropathy as a side effect, it is a specific drug-induced cause and not the most common overall cause in the general population.
Option C: Systemic Lupus Erythematosus is an autoimmune disease that can cause neuropathy through vasculitis. However, SLE is far less common in the population than Diabetes Mellitus, so it is not the 'commonest cause' overall.
Option D: Rheumatoid Arthritis, another autoimmune disease, can cause neuropathy via nerve compression or vasculitis. Similar to SLE, its prevalence is much lower than diabetes, making it an incorrect choice for the 'commonest cause'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Peripheral Neuropathy as background academic context rather than a clinical decision trigger.
Nurses are central to managing patients with diabetic neuropathy. A key role is educating patients on meticulous daily foot care to prevent non-healing ulcers, infections, and subsequent amputations, which are major complications.
Consistent monitoring of blood glucose levels and reinforcing the importance of tight glycemic control are primary nursing responsibilities to help slow the progression of nerve damage.
What if the question asked for the most common cause of neuropathy worldwide? The answer would likely change to Leprosy (Hansen's disease), which is the leading cause in many developing countries in Asia, Africa, and South America.

How to Approach the Question

First, identify the key terms in the question: 'commonest cause', 'Peripheral Neuropathy', and the specific context 'developed countries'.
This is a factual recall question that requires knowledge of epidemiology.
Consider the prevalence of each condition listed in the options within the general population of a developed country.
Diabetes Mellitus is a highly prevalent chronic disease, affecting a large percentage of the population.
Compare this to the prevalence of Isoniazid use (only for TB), SLE, and Rheumatoid Arthritis, which are all significantly less common than diabetes.
Conclude that the complication of the most common disease (Diabetes) is the most likely answer for the 'commonest cause' of the neuropathy.

Concept Tested & Keywords

Concept Tested: Etiology of Peripheral Neuropathy
Stem keywords: commonest cause, Peripheral Neuropathy, developed countries
Lead-in keywords: is
Clinical cues: The qualifier 'developed countries' is important as the most common cause can vary by geographic region (e.g., leprosy in other parts of the world).
Negative lead-in flag: false

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E6 Medicine Harrison 22e Part 2 pp. 1509-1511, 1510-1512

E6 Medicine Davidson Principles Practice 24e p. 1160-1162