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Contact the study team using the details below to take part. If there are no contact details below please ask your doctor in the first instance.
Stroke Ischemic Stroke
This information is provided directly by researchers, and we recognise that it isn't always easy to understand. We are working with researchers to improve the accessibility of this information. In some summaries, you may come across links to external websites. These websites will have more information to help you better understand the study.
Interruption of blood supply to the brain from a blocked blood vessel causes ischaemic stroke. This leads to symptoms relating to the areas of brain affected. For example, people with stroke may suddenly have trouble moving their arms, legs or face, and may find it hard to speak or lose consciousness. There are treatments available to open up the blocked blood vessel:
* Thrombolysis involves injecting a medicine to break down the blood clot causing the blockage.
* Thrombectomy means pulling the blood clot out through a tiny tube placed within the blood vessel.
Both treatments can help restore blood supply to the brain and reverse the symptoms caused by stroke. These treatments are usually only offered when there is a clear onset time for stroke symptoms. However, for around 20% of strokes, the time of onset is unknown. Patients may wake up with symptoms, be confused or be found collapsed.
So that treatment can be available to more people, the investigators have developed a method to estimate when an ischaemic stroke began, the CT Clock Tool. This method involves taking measurements from the brain imaging that most patients with stroke routinely get on arrival at hospital (CT or CAT scanning). In other words, no extra tests are needed to use the method; the investigators seek to make better use of existing tests.
In this study, the aim is to understand whether it is feasible to use the CT Clock Tool method in the real world. For example, can doctors correctly use the tool during their normal work to produce accurate estimates for the onset time of stroke? The results of this study will be used to plan a future clinical trial for testing the safety of the CT Clock Tool when it is used to treat patients.
Start dates may differ between countries and research sites. The research team are responsible for keeping the information up-to-date.
The recruitment start and end dates are as follows:
"Mair G, Alzahrani A, Lindley RI, Sandercock PAG, Wardlaw JM. Feasibility and diagnostic accuracy of using brain attenuation changes on CT to estimate time of ischemic stroke onset. Neuroradiology. 2021 Jun;63(6):869-878. doi: 10.1007/s00234-020-02591-w. Epub 2020 Oct 30."; "33128140"; "Alzahrani A, Zhang X, Albukhari A, Wardlaw JM, Mair G. Assessing Brain Tissue Viability on Nonenhanced Computed Tomography After Ischemic Stroke. Stroke. 2023 Feb;54(2):558-566. doi: 10.1161/STROKEAHA.122.041241. Epub 2023 Jan 5."; "36601950"
You can take part if:
You may not be able to take part if:
This is in the inclusion criteria above
Below are the locations for where you can take part in the trial. Please note that not all sites may be open.
The study is sponsored by University of Edinburgh and is in collaboration with NHS Lothian.
Your feedback is important to us. It will help us improve the quality of the study information on this site. Please answer both questions.
You can print or share the study information with your GP/healthcare provider or contact the research team directly.
