Which of the following conditions is an early symptom commonly seen in myasthenia gravis?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2019

Medical & Surgical Nursing

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2019

Explanation

Myasthenia Gravis (MG) is an autoimmune disease where antibodies block acetylcholine receptors at the neuromuscular junction, causing muscle weakness.
The extraocular muscles are most frequently affected first, making ptosis (eyelid drooping) and diplopia (double vision) the earliest and most common presenting signs.
Symptoms of MG are characteristically fatigable, meaning they worsen with activity and improve with rest.
About 80% of patients with MG present initially with ocular symptoms like ptosis.

Option A: Respiratory distress is a sign of a myasthenic crisis, a severe, life-threatening exacerbation of MG that involves the respiratory muscles. It is a late complication, not an early symptom.
Option C: Paresthesia (numbness or tingling) is a sensory symptom. Myasthenia Gravis is a purely motor disorder affecting the neuromuscular junction and does not cause sensory deficits.
Option D: While dysphagia (difficulty swallowing) is a common symptom of MG due to bulbar muscle weakness, it typically develops after the initial ocular symptoms.

Clinical Relevance

Nursing practice connection: Knowing Early clinical manifestations of Myasthenia Gravis helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Early recognition of ptosis as a potential sign of MG is crucial for timely diagnosis and management, which can prevent progression to more severe symptoms.
Nurses must meticulously assess a patient's swallowing and respiratory function, as the disease can progress from ocular symptoms to life-threatening bulbar and respiratory muscle weakness.
Patient education is vital. Nurses should teach patients to recognize triggers that can worsen symptoms (e.g., stress, infection, heat, certain medications) and to pace their activities to conserve energy.

How to Approach the Question

First, identify the key terms in the question: 'Myasthenia Gravis' and 'early symptom'. This directs you to recall the typical onset and progression of the disease.
Analyze the pathophysiology of MG: It's an autoimmune disorder causing muscle weakness. Recall which muscle groups are affected first.
Evaluate each option based on the typical disease course. Ask yourself: 'Is this symptom seen at the very beginning of the disease, or does it appear later?'
Option A (Respiratory distress): This is a severe, life-threatening issue. It's more likely a late complication (crisis) than an early sign.
Option B (Ptosis): This involves eye muscles, which are small and frequently used. Recall that ocular muscles are commonly the first to show weakness in MG.
Option C (Paresthesia): This is a sensory symptom. Remember that MG is a motor disorder, so sensory symptoms are not expected.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1665-1667

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