Nursing care
Brain Metastases 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
Brain metastases nursing care centres on watching for raised intracranial pressure while managing dexamethasone therapy and seizure risk. The nurse tracks neuro checks, pupil response and headache pattern; the family watches the person changing in front of them. Early recognition of a new focal deficit or a falling GCS is the single most useful thing you bring to the bedside.
What it is and why it happens
Brain metastases are tumour cells that have travelled from a primary cancer elsewhere, most often lung, breast, melanoma, renal or colorectal, and lodged in brain tissue. They arrive by the bloodstream, usually at the grey-white matter junction where vessels narrow and cells catch. Multiple lesions are common; a solitary metastasis is the exception.
The problem is mass effect. A lesion that is small in volume can still raise intracranial pressure sharply, because the skull is a fixed space and oedema around the tumour adds volume faster than the tumour itself. That oedema, not the tumour mass alone, is what drives most of the acute symptoms and most of the nursing workload.
How it presents — what you will actually see
Headache that is worse on waking and eases through the morning is the classic pattern, caused by CO2 retention and venous congestion overnight. It often comes with morning vomiting that is not preceded by nausea, projectile in character. Neither sign is universal, so absence does not rule out metastatic disease.
Beyond that, presentation depends on location. Frontal lesions blunt personality and judgement before anything else appears on a motor exam. Cerebellar lesions produce ataxia and a wide-based gait. A new seizure in someone with a cancer history is a brain metastasis until proven otherwise. Watch for the quieter signs too: word-finding difficulty, a slight droop, one pupil sluggish where it wasn't yesterday.
Nursing assessment priorities
Neurological observations are the backbone of this care and they need a baseline, not just a snapshot. GCS, pupil size and reactivity, limb strength and speech, done at a fixed frequency and compared against yesterday's numbers, not just today's. A GCS drop of two points is a call to the team, not a note in the chart.
Vital sign pattern matters as much as neuro checks. Cushing's triad, widening pulse pressure, bradycardia and irregular respirations, is a late and ominous sign of rising ICP, so do not wait for it to act on earlier clues. Ask about headache character at every shift, and ask the family what they've noticed, since subtle personality change often shows up to them before it shows on a formal exam.
Interventions and what to do first
Dexamethasone is the first-line intervention for symptomatic oedema and it works within hours, well before radiotherapy or surgery can take effect. Give it with food, monitor blood glucose closely since steroid-induced hyperglycaemia is common, and taper it exactly as prescribed rather than stopping abruptly, which can precipitate rebound oedema and adrenal insufficiency.
Seizure precautions go in from admission, not after a first seizure: padded rails, suction and oxygen at the bedside, and a clear plan for what to give if a seizure starts. Elevate the head of the bed to thirty degrees to aid venous drainage, keep the neck neutral, and avoid clustering care activities that spike ICP through Valsalva-type strain, such as back-to-back suctioning and repositioning.
Complications to watch for
Herniation is the complication that kills quickly, and it is preceded by a change you can catch: a unilaterally blown pupil, a new hemiparesis, or a sudden drop in consciousness. Any of these is an emergency call, not a wait-and-monitor.
Steroid complications accumulate more slowly but matter over weeks: hyperglycaemia, proximal myopathy that weakens the legs before anything else, insomnia, and mood change ranging from euphoria to frank psychosis. Status epilepticus is the other acute risk in anyone with metastatic seizure activity, and it needs the same rapid-response mindset as a cardiac emergency.
Patient teaching before discharge
Teach the steroid taper in writing, not just verbally, because missed doses or an abrupt stop is one of the most preventable reasons for readmission. Explain why the dose is tapered rather than stopped and what symptoms mean the taper has gone too fast: fatigue, joint pain, nausea.
Cover seizure first aid with whoever will be at home: time it, protect the head, do not restrain the limbs, call emergency services if it lasts beyond five minutes or a second seizure follows without recovery. Give a clear list of red-flag symptoms that mean return immediately, worsening headache, new weakness, vomiting, or a change in alertness, and confirm the family knows who to call, not just what to watch for.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our med-surg practice questions are the closest set to what this page covers.
One question from the med-surg set
A client with chronic obstructive pulmonary disease has an oxygen saturation of 88% on 2 L/min via nasal cannula and is alert with no distress. What should the nurse do first?
Rationale
In COPD a saturation of 88–92% is the therapeutic target, not an emergency, and this client is alert with no distress. The first action is the independent nursing intervention that is least invasive and most likely to help: sit them up and reassess. Turning the oxygen up to 6 L/min risks blunting the hypoxic drive, and calling rapid response or drawing an ABG escalates ahead of an assessment you have not finished.
Answer: B
Common questions
Why does dexamethasone work so fast for brain metastases?
It reduces vasogenic oedema around the tumour by stabilising the blood-brain barrier, which is the main driver of symptoms rather than tumour bulk itself. Improvement in headache and alertness can appear within hours of the first dose, well ahead of any effect from radiotherapy or surgery.
What is the first sign of raised intracranial pressure to escalate on?
A change in level of consciousness or GCS score is more reliable and earlier than vital sign changes. Cushing's triad, bradycardia, widening pulse pressure and irregular breathing, is a late sign and should never be the trigger you wait for.
Do all patients with brain metastases need seizure precautions?
Yes, precautions go in regardless of seizure history because the risk is inherent to the lesion and its surrounding oedema, not something that only appears after a first event. Padded rails, suction at the bedside and a documented seizure plan are standard from admission.
How should the dexamethasone taper be explained to a patient going home?
Give the schedule in writing with exact doses and dates, and explain that stopping abruptly risks both rebound cerebral oedema and adrenal insufficiency. Tell them to report fatigue, joint aching or nausea during the taper, since these can mean it is being reduced too quickly for their body.
What NCLEX-style question pattern shows up for brain metastases?
Expect items that give a subtle change, morning headache with vomiting, one sluggish pupil, a word-finding pause, and ask which finding requires immediate notification. The correct answer is almost always the earliest, most specific neuro change, not the most dramatic-sounding option.
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