By advancing existing stroke triage systems, diagnosis and timely access of stroke patients to specialized care can be improved, which in turn can have a tremendous impact on current clinical... Show moreBy advancing existing stroke triage systems, diagnosis and timely access of stroke patients to specialized care can be improved, which in turn can have a tremendous impact on current clinical practice. The overall aim of this thesis was to assess various ways to improve stroke triage in the chain of acute stroke. To begin with patient triage by assessing the patient’s entrance into the chain of acute stroke care (Part I). To improve patient triage, the focus should be to directly involve the ambulance once stroke is suspected. In Part II, prehospital triage tools to improve patient selection in the ambulance are identified en validated. Prehospital triage tools that can help identify patients who are more likely to have large anterior vessel occlusion or can differentiate between patients with acute ischemic stroke and intracerebral hemorrhage, will improve patient selection in the ambulance and thereby result in earlier initiation of endovascular treatment, thereby improving patient outcomes. In the last part (Part III), in-hospital factors are investigated that are known to have an adverse effect on patient outcome in the final part of the chain of acute stroke care, as continued efforts need to be made to further reduce in-hospital delays. Show less
BackgroundSome studies have suggested that transdermal administration of glyceryl trinitrate (GTN; nitroglycerin) in the first few hours after symptom onset increases the chance of a favourable... Show moreBackgroundSome studies have suggested that transdermal administration of glyceryl trinitrate (GTN; nitroglycerin) in the first few hours after symptom onset increases the chance of a favourable outcome after ischaemic stroke or intracerebral haemorrhage, possibly through an increase in intracranial collateral blood flow and a reduction in blood pressure. The Multicentre Randomised trial of Acute Stroke treatment in the Ambulance with a nitroglycerin Patch (MR ASAP) aims to assess the effect of transdermal GTN, started within 3 h after stroke onset in the prehospital setting, on functional outcome at 90days in patients with acute ischaemic stroke or intracerebral haemorrhage.MethodsMR ASAP is a phase III, multicentre, randomised, open-label clinical trial with a blinded outcome assessment. A total of 1400 adult patients with suspected stroke and a systolic blood pressure140mmHg will be randomised to transdermal GTN (5mg/day), administered as a transdermal patch by paramedics in the prehospital setting within 3h of stroke onset and continued for 24h or to standard care. The primary outcome is the score on the modified Rankin Scale (mRS) at 90days, analysed with ordinal logistic regression. Secondary outcomes include blood pressure and collateral circulation at hospital admission, neurological deficit measured with the National Institutes of Health Stroke Scale at 24h, and mortality and poor outcome (mRS score 3 to 6) at 90days. This trial will be conducted in the Netherlands and will use a deferred consent procedure. The trial is part of the Collaboration for New Treatments of Acute Stroke (CONTRAST) programme.DiscussionMR ASAP will assess whether very early administration of GTN improves outcome after stroke in a setting where rates of intravenous thrombolysis and endovascular treatment for acute ischaemic stroke are high. The deferred consent procedure facilitates prompt GTN treatment and will prevent delay to revascularisation therapies. If early transdermal GTN treatment proves to be effective, this low-cost treatment can be readily implemented into daily clinical practice.Trial registrationISRCTN Registry, ISRCTN99503308. Registered on 2 January 2018. Show less
