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Ultra-acute diagnostics for stroke: Large-scale implementation of prehospital biomarker sampling.

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Title: Ultra-acute diagnostics for stroke: Large-scale implementation of prehospital biomarker sampling.
Authors: Mattila, O. S., Harve, H., Pihlasviita, S., Ritvonen, J., Sibolt, G., Pystynen, M., Strbian, D., Curtze, S., Kuisma, M., Tatlisumak, T., Lindsberg, P. J.
Source: Acta Neurologica Scandinavica. Jul2017, Vol. 136 Issue 1, p17-23. 7p.
Subjects: Stroke diagnosis, Stroke patients, Biomarkers, Emergency medical services, Blood sampling, Thrombolytic therapy
Abstract: Objectives Blood-based biomarkers could enable early and cost-effective diagnostics for acute stroke patients in the prehospital setting to support early initiation of treatments. To facilitate development of ultra-acute biomarkers, we set out to implement large-scale prehospital blood sampling and determine feasibility and diagnostic timesavings of this approach. Materials and Methods Emergency medical services (EMS) personnel of the Helsinki metropolitan area were trained to collect prehospital blood samples from thrombolysis candidates using a cannula adapter technique. Time delays, sample quality, and logistics were investigated between May 20, 2013 and May 19, 2014. Results Prehospital blood sampling and study recruiting were successfully performed for 430 thrombolysis candidates, of which 50% had ischemic stroke, 14.4% TIA, 13.5% hemorrhagic stroke, and 22.1% stroke mimics. A total of 66.3% of all samples were collected during non-office hours. The median (interquartile range) emergency call to prehospital sample time was 33 minutes (25-41), and the median time from reported symptom onset or wake-up to prehospital sample was 53 minutes (38-85; n=394). Prehospital sampling was performed 31 minutes (25-42) earlier than hospital admission blood sampling and 37 minutes (30-47) earlier than admission neuroimaging. Hemolysis rate in serum and plasma samples was 6.5% and 9.3% for EMS samples, and 0.7% and 1.6% for admission samples. Conclusions Prehospital biomarker sampling can be implemented in all EMS units and provides a median timesaving of more than 30 minutes to first blood sample. Large prehospital sample sets will enable development of novel ambulance biomarkers to improve early differential diagnosis and treatment of thrombolysis candidates. [ABSTRACT FROM AUTHOR]
Copyright of Acta Neurologica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: <searchLink fieldCode="AR" term="%22Mattila%2C+O%2E+S%2E%22">Mattila, O. S.</searchLink><br /><searchLink fieldCode="AR" term="%22Harve%2C+H%2E%22">Harve, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Pihlasviita%2C+S%2E%22">Pihlasviita, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Ritvonen%2C+J%2E%22">Ritvonen, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Sibolt%2C+G%2E%22">Sibolt, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Pystynen%2C+M%2E%22">Pystynen, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Strbian%2C+D%2E%22">Strbian, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Curtze%2C+S%2E%22">Curtze, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Kuisma%2C+M%2E%22">Kuisma, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Tatlisumak%2C+T%2E%22">Tatlisumak, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Lindsberg%2C+P%2E+J%2E%22">Lindsberg, P. J.</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Stroke+diagnosis%22">Stroke diagnosis</searchLink><br /><searchLink fieldCode="DE" term="%22Stroke+patients%22">Stroke patients</searchLink><br /><searchLink fieldCode="DE" term="%22Biomarkers%22">Biomarkers</searchLink><br /><searchLink fieldCode="DE" term="%22Emergency+medical+services%22">Emergency medical services</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+sampling%22">Blood sampling</searchLink><br /><searchLink fieldCode="DE" term="%22Thrombolytic+therapy%22">Thrombolytic therapy</searchLink>
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  Label: Abstract
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  Data: Objectives Blood-based biomarkers could enable early and cost-effective diagnostics for acute stroke patients in the prehospital setting to support early initiation of treatments. To facilitate development of ultra-acute biomarkers, we set out to implement large-scale prehospital blood sampling and determine feasibility and diagnostic timesavings of this approach. Materials and Methods Emergency medical services (EMS) personnel of the Helsinki metropolitan area were trained to collect prehospital blood samples from thrombolysis candidates using a cannula adapter technique. Time delays, sample quality, and logistics were investigated between May 20, 2013 and May 19, 2014. Results Prehospital blood sampling and study recruiting were successfully performed for 430 thrombolysis candidates, of which 50% had ischemic stroke, 14.4% TIA, 13.5% hemorrhagic stroke, and 22.1% stroke mimics. A total of 66.3% of all samples were collected during non-office hours. The median (interquartile range) emergency call to prehospital sample time was 33 minutes (25-41), and the median time from reported symptom onset or wake-up to prehospital sample was 53 minutes (38-85; n=394). Prehospital sampling was performed 31 minutes (25-42) earlier than hospital admission blood sampling and 37 minutes (30-47) earlier than admission neuroimaging. Hemolysis rate in serum and plasma samples was 6.5% and 9.3% for EMS samples, and 0.7% and 1.6% for admission samples. Conclusions Prehospital biomarker sampling can be implemented in all EMS units and provides a median timesaving of more than 30 minutes to first blood sample. Large prehospital sample sets will enable development of novel ambulance biomarkers to improve early differential diagnosis and treatment of thrombolysis candidates. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Acta Neurologica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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