Nursing care
Guillain-Barré Syndrome nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Guillain-Barré syndrome nursing care centres on tracking ascending paralysis before it reaches the muscles of respiration. Assess vital capacity and negative inspiratory force on a set schedule, not just when the patient looks breathless, because weakness can climb from the feet to the diaphragm over hours to days and respiratory failure can arrive before obvious distress does.
What it is and why it happens
Guillain-Barré syndrome is an acute autoimmune polyneuropathy. The immune system, usually triggered by a preceding infection such as Campylobacter jejuni, cytomegalovirus, or a recent respiratory illness, produces antibodies that cross-react with myelin on peripheral nerves. The result is demyelination, and in more severe cases axonal damage, that disrupts nerve conduction from the periphery inward.
The hallmark is ascending, symmetric weakness. It typically starts in the feet and legs and moves upward over hours to a few weeks, which is why a single strength check on admission tells you almost nothing about where the patient will be tomorrow. Onset, nadir, and recovery each unfold on their own timeline, and the nadir is when respiratory and autonomic complications are most likely.
How it presents — what you will actually see
The presenting complaint is often tingling or numbness in the toes and fingertips, followed within days by symmetric limb weakness that climbs. Deep tendon reflexes diminish or disappear early, which distinguishes GBS from many other causes of weakness. Pain is common and frequently underrecognised, described as deep, aching, or cramping in the back and legs.
As paralysis ascends, watch for weakening cough, shallow or laboured breathing, and difficulty swallowing or handling secretions, all signs that the intercostal muscles and diaphragm are becoming involved. Cranial nerve involvement can produce facial weakness, dysphagia, and diplopia. Autonomic instability shows up as swings in blood pressure and heart rate, sometimes ileus or urinary retention, and it can appear even while limb strength looks stable.
Nursing assessment priorities
Because this is ascending paralysis, the assessment that matters most is respiratory, and it has to be scheduled, not reactive. Trend vital capacity and negative inspiratory force at set intervals rather than relying on oxygen saturation or respiratory rate alone; both can stay near normal until the patient is close to needing intubation. A falling vital capacity, a weakening cough, or an NIF trending toward -20 to -25 cmH2O is your cue to escalate, not wait.
Pair respiratory monitoring with a limb-by-limb strength assessment on every shift so you can chart the direction and pace of ascent, not just a snapshot. Check swallow and gag before offering food or fluids, since aspiration risk rises as bulbar muscles weaken. Monitor heart rate and blood pressure for autonomic swings, and assess bowel and bladder function, since ileus and retention are common and easy to miss when attention is fixed on the limbs.
Interventions and what to do first
If respiratory parameters are declining, your first move is to escalate for possible intubation before the patient decompensates; do not wait for oxygen saturation to drop. Keep intubation and suction equipment at the bedside for any patient with ascending weakness. Disease-modifying treatment is plasmapheresis or IVIG, started early in the course to shorten recovery; monitor for hypotension and access-site issues during plasmapheresis, and for headache, fever, or renal effects with IVIG.
Prevent complications of immobility from day one: turn and reposition on a schedule, apply sequential compression devices or prescribed anticoagulation for DVT prophylaxis, and involve physical therapy early even while the patient is still weakening, since passive range of motion protects joints and skin regardless of prognosis. Manage neuropathic pain with gabapentin or similar agents rather than opioids alone, and provide a communication method for patients who cannot speak due to bulbar or diaphragmatic weakness.
Complications to watch for
Respiratory failure is the complication that drives ICU admission, and it can develop faster than the limb weakness suggests. Autonomic dysfunction is the other major threat: labile blood pressure, arrhythmias including bradycardia, and even cardiac arrest have been reported, so continuous cardiac monitoring is standard in the acute phase for anyone with significant weakness.
Beyond the acute crisis, watch for aspiration pneumonia from impaired swallow, DVT and pulmonary embolism from prolonged immobility, pressure injuries in a patient who cannot reposition themselves, and paralytic ileus or urinary retention from autonomic involvement. Depression and anxiety are common during the plateau phase, when patients are fully conscious but unable to move or speak, and deserve as much attention as the physical complications.
Patient teaching before discharge
Recovery from GBS is typically the reverse of onset, descending as it clears, and it can take weeks to over a year depending on severity; most patients regain substantial function, though some are left with residual weakness or fatigue. Set expectations early that recovery is gradual and nonlinear, and that fatigue may persist well after strength returns.
Teach the patient and family to recognise and report any new weakness, breathing difficulty, or swallowing problems immediately, since GBS can occasionally relapse or a related variant can recur. Reinforce the rehabilitation plan, including physical and occupational therapy goals, energy conservation techniques for fatigue, and DVT precautions if mobility is still limited at discharge. Address the psychological toll of a sudden, unpredictable illness and connect the family with support resources before they leave the unit.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our neurological practice questions are the closest set to what this page covers.
Common questions
What is the earliest warning sign that GBS is affecting respiration?
A falling vital capacity or negative inspiratory force, or a cough that is losing force, come before oxygen saturation drops in most cases. That is why serial pulmonary function measurements, not pulse oximetry alone, are the standard for monitoring ascending weakness.
Why do deep tendon reflexes disappear in GBS?
Demyelination disrupts the reflex arc at the peripheral nerve level, so reflexes diminish or vanish even while muscle bulk looks unchanged. Areflexia alongside ascending weakness is one of the clinical features that points toward GBS over other causes of limb weakness.
Is plasmapheresis or IVIG better for GBS?
Both are considered equally effective when started early in the disease course, and combining them offers no added benefit over either alone. Choice often comes down to venous access, availability, and patient-specific contraindications such as IgA deficiency for IVIG or hemodynamic instability for plasmapheresis.
How does GBS show up in NCLEX questions?
Expect scenarios testing whether you recognise ascending weakness as a respiratory emergency in progress, prioritise vital capacity monitoring over reflexively checking oxygen saturation, and identify autonomic instability as a reason for continuous cardiac monitoring. Questions often set a trap where saturation looks fine to see if you still escalate on falling vital capacity.
Can GBS come back after recovery?
True relapse is uncommon, occurring in a small minority of cases, but patients and families should still be taught to report new or returning weakness right away. A related but distinct entity, chronic inflammatory demyelinating polyneuropathy, can present similarly but follows a relapsing or progressive course rather than a single monophasic illness.