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    Breaking News

    UK Study Reveals the Accuracy of a 90-Minute COVID-19 Test

    Lab-in-Cartridge rapid testing device shown to have over 94% sensitivity and 100% specificity.

    UK Study Reveals the Accuracy of a 90-Minute COVID-19 Test
    The blue circular Covidnudge Cartridge inside the Nudgebox Analyser. Image courtesy of Thomas Angus/Imperial College London.
    Imperial College London09.18.20
    A 90-minute COVID-19 test has been shown to have over 94 per cent sensitivity, and 100 per cent specificity in a new study published in the journal The Lancet Microbe. 
     
    In the research, which was led by scientists from Imperial College London, the high-speed tests, which do not require a laboratory and can be performed in cartridges smaller than a mobile phone, were used on 386 NHS staff and patients.
     
    The Lab-in-Cartridge rapid testing device, which can be performed at a patient's bedside, was shown to have over 94% sensitivity and 100% specificity, which meant it had a high level of accuracy and produced very few false negatives and no false positives.
     
    The test is currently being used successfully across eight London hospitals, and due to be rolled out at a national level, and data continues to be gathered from the testing device for continual assessment. The UK government recently placed an order for 5.8 million of the testing kits.
     
    How it Works
     
    To perform the test, a pediatric-sized nose swab from a patient is inserted into the device, which then looks for traces of genetic material belonging to the SARS-CoV-2 virus, which causes COVID-19.
     
    A result is available within 90 minutes, compared to conventional COVID-19 testing which delivers a result in 24 hours. The test is now being developed for assessing simultaneously Flu-A, Flu-B, and RSV as well as COVID19.
     
    Professor Graham Cooke, lead author of the study from the Department of Infectious Disease at Imperial said, "These results suggest the test, which can be performed at a patient's bedside without the need to handle any sample material, has comparable accuracy to standard laboratory testing. Many tests involve a trade-off between speed and accuracy, but this test manages to achieve both. Developing an effective bedside test in under three months has been an incredible collaboration between teams of engineers, clinicians and virologists."
     
    The device, produced by DnaNudge, an Imperial start-up headquartered in White City, was used on 280 NHS staff members with suspected COVID-19, 15 patients in A&E with suspected COVID-19, and 91 hospital in-patients (some of who were not displaying COVID-19 symptoms).
     
    Accuracy
     
    The samples from all individuals in the study were analyzed on both the rapid-testing device, called the CovidNudge test, and standard hospital laboratory equipment - and then the results compared.
     
    The percentage of those found to be positive for COVID-19 was 18 per cent (the study was conducted in the peak of COVID-19). The results showed 67 samples tested positive on the CovidNudge test, compared with 71 positive results against a range of NHS standard laboratory machines, which represents the value of 94 per cent sensitivity. The study was supported by the National Institute for Health Research Imperial Biomedical Research Centre.
     
    Regius Professor Chris Toumazou, CEO and co-founder of DnaNudge and founder of the Institute of Biomedical Engineering at Imperial, said: "The DnaNudge test was developed as a lab-free, on-the-spot consumer service that can be delivered at scale, so we clearly believe it offers very significant potential in terms of mass population testing during the COVID-19 pandemic. The platform is well suited to testing in primary care and community settings with potential for use in non-healthcare settings such as care homes, schools, transport hubs, offices, and, to help bring the arts back, in theatres and venues. However, further studies of real-world effectiveness in non-clinical settings would be required prior to widespread deployment."
     
    The device recently obtained a CE mark, enabling its additional use in non-clinical locations (it has been previously approved by the UK Medicines and Healthcare.
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