Stroke misdiagnosis claims

At Osbornes Law, our medical negligence team has decades of experience pursuing stroke misdiagnosis claims, including a £900,000 settlement for a grandfather whose stroke was not recognised by his carers. We act on a no win no fee basis.

Why stroke is the most time-critical diagnosis in medicine

In 2021, our partner Jodi Newton secured £900,000 for a grandfather whose stroke was missed by his carers. The delay cost him the chance of an early intervention that could have transformed his recovery. The case illustrates what makes stroke claims different from other medical negligence work.

Stroke treatment runs on a clock. NICE guideline NG128 sets out the windows that matter. Alteplase, the clot-dissolving drug, can be given for ischaemic stroke if started within 4.5 hours of symptom onset. Mechanical thrombectomy, the surgical removal of the clot, is offered within 6 hours of onset, and is now offered up to 24 hours for confirmed occlusion of the proximal anterior circulation, including wake-up strokes.

Every hour without treatment costs roughly two million neurons. Patients who reach hospital, get scanned, and receive thrombolysis within an hour of symptom onset have a real prospect of walking out of the ward. Those who arrive late, or whose stroke is mistaken for migraine or anxiety in the emergency department, often leave with permanent disability.

How stroke gets misdiagnosed

Stroke is misdiagnosed surprisingly often, particularly in younger patients and in atypical presentations. The misdiagnosis pattern is consistent across the claims we handle:

• Migraine with aura
• Vertigo, dizziness, or labyrinthitis
• Alcohol intoxication
• Hypoglycaemia
• Seizures or post-ictal states
• Anxiety, panic attacks, or functional neurological disorder

The front line of stroke recognition is the FAST test: Face, Arms, Speech, Time. Anyone presenting with sudden facial droop, arm weakness, or slurred speech should be triaged as a stroke until proven otherwise. In the emergency department, the ROSIER score (Recognition of Stroke in the Emergency Room) is used to stratify FAST-positive patients.

NICE NG128 expects an urgent brain scan in everyone with suspected stroke, with the scan reported by a clinician trained to interpret it. Where the scan is delayed, the report is delayed, or the result is misread, the thrombolysis window can be lost. Missing the FAST signs, dismissing them, or failing to escalate to the stroke team is where many of our claims begin.

TIA, the warning that gets brushed off

A transient ischaemic attack is a temporary blockage of blood to the brain. Symptoms resolve within 24 hours, often within minutes. Around one in twelve people who have a TIA will have a major stroke within a week.

NICE NG128 is unambiguous on what should happen. Anyone with a suspected TIA should be given aspirin 300mg immediately, unless contraindicated, and referred for specialist assessment to be seen within 24 hours of symptom onset. The TIA clinic should arrange imaging and start secondary prevention the same day.

We see claims involving GPs who told TIA patients to come back if it happened again, and emergency clinicians who discharged TIA patients without an aspirin or a referral. When the major stroke follows days or weeks later, the link back to the missed TIA is direct.

When a missed stroke diagnosis amounts to medical negligence

A claim does not arise just because the diagnosis was wrong or late. We have to show two things. First, that the care fell below the standard of a reasonably competent clinician. Second, that the failure made a real difference to your outcome.

NICE NG128 is the benchmark we use for the first point. If the FAST signs were missed in a patient who presented within the thrombolysis window, if a CT head was not arranged promptly, if a TIA was sent home without aspirin and a 24-hour referral, or if a care home failed to recognise classic stroke signs and call 999, that is a strong starting point for a breach of duty argument.

Causation in stroke claims often turns on the treatment window. We instruct independent stroke physicians and neurologists to compare your outcome with the outcome you would have had if thrombolysis or thrombectomy had been given on time. A delay that costs you the alteplase window can be the difference between a near-full recovery and lifelong hemiparesis.

The impact of a delayed stroke diagnosis

Stroke is the leading cause of complex disability in adults in the UK. Delays produce a familiar set of outcomes: paralysis of one side of the body (hemiparesis), aphasia and other speech and language problems, swallowing difficulties, cognitive impairment, mood and behavioural changes, and a reduced ability to work or live independently.

For some people, the delay is fatal. We act for families in fatal medical negligence claims where the stroke was survivable on the standard pathway but not on the pathway the patient actually received.

What you can claim compensation for

Compensation is calculated under two heads. General damages cover the pain, suffering and loss of amenity caused by the negligence. The Judicial College Guidelines set out the brackets for brain injury and stroke cases. Special damages cover the financial losses that flow from the delay.

In practice, that includes:

• Loss of earnings if the stroke has stopped you working, or shortened your working life.
• Care costs, whether domiciliary, residential, or family care provided by relatives.
• Home adaptations, mobility equipment, and assistive technology.
• Rehabilitation: physiotherapy, occupational therapy, speech and language therapy.
• Travel costs for hospital and outpatient appointments.
• Future losses, including pension shortfall and dependency claims where the prognosis is poor.

In 2021 we recovered £900,000 for a grandfather whose carers failed to identify a stroke. Settlements in serious stroke claims regularly reach six and seven figures depending on the level of ongoing care needed and the impact on life expectancy.

Making a stroke claim with Osbornes

We work in three stages.

1. Initial review. You tell us what happened. We listen, ask questions, and tell you honestly whether we think there is a claim worth investigating. There is no obligation at this stage.
2. Investigation. We obtain the full medical records, including ambulance, emergency department, radiology and care home logs where relevant. We instruct an independent stroke physician to review standard of care, and a neurologist to address causation. This work is funded under a no win no fee agreement.
3. Resolution. Most stroke claims settle out of court once the medical evidence is exchanged. If yours does not, our medical negligence lawyers will issue proceedings and take the case to trial.

You have three years from the date of the negligence, or the date you became aware that negligence may have caused harm, to bring a claim. In cases involving children or patients who lack capacity, different rules apply and the clock may not start running.

Why families choose Osbornes for stroke claims

Our medical negligence team is led by partner Jodi Newton, whose work on complex misdiagnosis claims is recognised by Chambers UK 2026 and Legal 500 2026. Several of our solicitors hold medical qualifications, which means we read GP notes, emergency department triage records and radiology reports the way an expert witness would.

The firm handles a high volume of brain injury work, including serious brain injury claims under both personal injury and medical negligence law. That depth of brain injury experience matters in stroke claims, where ongoing care needs drive much of the settlement value.

“Jodi Newton acts for clients on claims arising from negligent obstetric care, sepsis and delays in diagnosis and treatment.”

Chambers UK 2026

We are members of the Action against Medical Accidents (AvMA) clinical negligence panel and hold the Law Society Clinical Negligence Accreditation.

Speak to a stroke claims solicitor today

If you believe your stroke was missed, misdiagnosed or treated too late, our medical negligence lawyers will review your case in confidence and without obligation.

Call 020 7485 8811 or fill in the contact form below.