A nurse is caring for a client with Guillain-Barré syndrome who is experiencing ascending paralysis that has progressed to the thoracic level. The client reports difficulty breathing and appears anxious. Which nursing action should be the highest priority?

In Guillain-Barré syndrome, ascending paralysis to the thoracic level compromises respiratory muscles, making immediate airway management the priority. Other options address anxiety, comfort, or breathing exercises but do not manage the life-threatening respiratory failure.

Clinical Reasoning and Priority Setting

The correct answer is Decreased vital capacity and shallow respirations. In Guillain-Barré syndrome (GBS), the hallmark of clinical deterioration is ascending paralysis that can progress to involve the respiratory muscles. When applying the nursing process and prioritizing client needs, the airway, breathing, and circulation (ABC) framework always takes precedence. A decrease in vital capacity and the presence of shallow respirations are direct indicators of impending respiratory failure, the most life-threatening complication of GBS.

Pathophysiology and Clinical Correlation

GBS is an acute, immune-mediated polyneuropathy characterized by demyelination and axonal degeneration of peripheral nerves. The ascending paralysis pattern means weakness typically begins in the lower extremities and moves upward. The critical danger occurs when this paralysis reaches the diaphragm and intercostal muscles. The assessment findings in option 1 signify that the neuromuscular blockade is compromising the mechanics of ventilation. A falling vital capacity reflects weakening of the diaphragm, and shallow respirations indicate that the tidal volume is becoming insufficient to maintain effective gas exchange. This trajectory leads directly to hypercapnia, hypoxemia, and respiratory arrest if not immediately managed with ventilatory support.

The urgency of this finding is strongly supported by the provided evidence. A case report by Penfold et al. highlights a patient with a GBS variant who developed bilateral vocal cord paralysis and subsequent respiratory failure, ultimately requiring emergency intubation and tracheostomy ^[1]. This underscores how rapidly bulbar and respiratory muscle involvement can necessitate definitive airway management. Furthermore, a retrospective study by Surve et al. on pediatric GBS patients in the intensive care unit identifies the need for mechanical ventilation as a primary outcome, emphasizing that recognizing the clinical predictors of intubation is a central concern in acute GBS management ^[2]. These sources confirm that monitoring for and responding to respiratory decompensation is the highest nursing priority.

Analysis of Other Options

- Option 2: Numbness and tingling in the lower extremities. These are classic early sensory symptoms of GBS. While important to document and monitor, they represent the initial phase of the disease process and do not pose an immediate threat to the client's survival. They are a lower priority than a compromised airway and breathing.
- Option 3: Difficulty swallowing and mild dysarthria. These findings indicate bulbar muscle involvement, which is a serious progression of GBS. Dysphagia increases the risk of aspiration, and dysarthria signals weakness in the muscles controlling speech. This finding requires prompt intervention, such as placing the client on NPO status and elevating the head of the bed. However, it is secondary to the immediate life threat of respiratory muscle failure. Airway protection is a concern, but ventilatory failure is a more imminent cause of death.
- Option 4: Muscle weakness in bilateral upper extremities. This is a sign of the ascending paralysis reaching the upper limbs. While it represents disease progression and impacts the client's functional ability, it does not directly threaten the airway or breathing. It is a lower priority than respiratory assessment findings.

Essential Nursing Action

The most immediate nursing intervention for a client with a decreasing vital capacity is to prepare for emergency airway management. This involves positioning the client to optimize breathing, providing supplemental oxygen, having emergency intubation equipment at the bedside, and immediately notifying the rapid response team and the healthcare provider. Continuous monitoring of oxygen saturation, end-tidal CO2 if available, and serial vital capacity measurements are critical to determine the exact moment when non-invasive support must transition to mechanical ventilation.

Clinical Practice Guide
In nursing care for GBS patients, respiratory status should be assessed every hour or continuously. If Vital Capacity drops below 15-20 mL/kg, or Maximum Inspiratory Pressure (MIP) falls below -30 cmH2O, these are warning signs that mechanical ventilation may be needed. Dyspnea, anxiety, tachypnea, use of accessory muscles, and inability to speak in full sentences are all signs suggesting imminent intubation.
Caution:
In SATA (Select All That Apply) questions, when "chest-level paralysis" and "dyspnea" are presented together, active interventions to prevent life-threatening complications (preparing for airway management) always take higher priority over conservative management for stabilization (position changes, deep breathing exercises). Anxiety can be a result of respiratory failure, so administering anxiolytics to relieve only the symptom without treating the cause is dangerous.