Myasthenia Gravis & Guillain-Barré Nursing Care

Both diseases attack the neuromuscular system but at different points. Myasthenia gravis (MG) is a chronic autoimmune disease where antibodies block acetylcholine receptors at the neuromuscular junction — so the muscle can’t receive the “contract” signal, producing weakness that worsens with use and improves with rest. Guillain-Barré syndrome (GBS) is an acute autoimmune attack on peripheral nerve myelin, usually triggered by a recent infection, producing rapidly ascending paralysis over days.

They are grouped here because the nursing priority is identical and life-or-death: respiratory muscle involvement. Whether the weakness descends (MG) or ascends (GBS), the moment it reaches the diaphragm and intercostals, the patient needs ventilatory support.

The assessment that matters most is respiratory: trend bedside forced vital capacity (FVC) and negative inspiratory force (NIF), respiratory rate and pattern, oxygen saturation, cough strength, and the ability to handle secretions. A falling FVC predicts respiratory failure before oxygen desaturation appears — don’t wait for a low SpO₂. Assess swallowing and speech (bulbar weakness raises aspiration risk), limb strength and its direction of change, and, in GBS, autonomic signs — wide BP swings, tachy/bradyarrhythmias, ileus, urinary retention. In MG, note the daily fatigability pattern and any new SLUDGE signs that point to cholinergic excess.

Both diseases are terrifying because the mind stays sharp while the body fails — a GBS patient may be fully alert and unable to move or breathe, and a myasthenic patient feels strength drain away mid-task. Establish a reliable communication method for paralyzed or ventilated patients (eye blinks, boards), explain every step before touching them, and never assume an immobile patient can’t hear or understand. Reassure GBS patients that recovery is the usual outcome, and support the exhaustion and fear that fatigable weakness brings in MG.

MG: strict medication timing and never abruptly stopping, energy conservation, recognizing crisis warning signs (worsening weakness, swallowing or breathing trouble) and seeking care immediately, avoiding triggers (infection, heat, stress, and medications that worsen MG — confirm new drugs with the provider), and planning rest. GBS: explain the expected course and that most people recover substantially, the importance of rehabilitation, VTE and skin precautions during immobility, and reporting any new infection. Both: keep vaccinations and infection prevention current, carry medical-alert information, and know when to call versus come in. Reinforce that the airway is the thing to watch — escalate breathing or swallowing changes fast.