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Home NEWS Science News Immunology

Blood clots related to AstraZeneca/Oxford vaccine can be mitigated with early detection

Bioengineer by Bioengineer
June 29, 2021
in Immunology
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New research highlights the need for heightened awareness and early testing for patients with signs of clotting disorder following vaccination

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Credit: RCSI University of Medicine and Health Sciences

Tuesday, 29 June 2021 – New research has shown that early testing for blood clots in patients who had received the AstraZeneca/Oxford vaccine led to them being treated successfully, highlighting the need for heightened awareness of the risk among doctors.

The work, led by researchers from RCSI University of Medicine and Health Sciences and the National Coagulation Centre at St James’s Hospital, is published in the British Journal of Haematology.

Unusual blood clots with low blood platelets have been recognised as a very rare complication of the AstraZeneca vaccine. However, with increased awareness, patients may not have all of these symptoms when they initially present to medical services.

The researchers highlighted four patients who had clotting complications induced by the vaccine (Vaccine Induced Thrombotic Thrombocytopenia, VITT). Based on the current guidance, each patient could have been classified as a low likelihood for this syndrome when they presented to doctors, but due to the increased awareness and clinical vigilance from the medical teams involved, all were sent for testing early, diagnosed and treated successfully.

“The risk of developing a blood clot from the vaccine is still far lower than the risk of developing clots from Covid-19, but it is imperative that clinicians are vigilant in detecting symptoms among vaccinated patients,” said Dr Michelle Lavin, the lead author of the paper and researcher at the Irish Centre for Vascular Biology and the RCSI School of Pharmacy and Biomolecular Science.

“Our research has shown that current guidelines lack the sensitivity to detect early cases of vaccine-induced clotting, which could risk missing or delaying diagnoses. As our understanding of this novel condition evolves, heightening our clinical awareness can improve outcomes for patients through early testing and treatment.”

This work is part of the Irish COVID-19 Vasculopathy Study (ICVS), supported by a Health Research Board COVID-19 Rapid Response award and also by a philanthropic grant from the 3M Foundation to RCSI University of Medicine and Health Sciences in support of COVID-19 research. The work was carried out in hospitals in both the Republic of Ireland and Northern Ireland.

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About RCSI University of Medicine and Health Sciences

RCSI University of Medicine and Health Sciences is a world-leading university for Good Health and Well-being. Ranked second in the world for its contribution to UN Sustainable Development Goal 3 in the Times Higher Education Impact Rankings 2021, it is exclusively focused on education and research to drive improvements in human health worldwide.

RCSI is an international not-for-profit university, headquartered in Dublin. It is among the top 250 universities worldwide in the World University Rankings (2021) and its research is ranked first in Ireland for citations. RCSI has been awarded Athena Swan Bronze accreditation for positive gender practice in higher education.

Visit the RCSI MyHealth Expert Directory to find the details of our experts across a range of healthcare issues and concerns. Recognising their responsibility to share their knowledge and discoveries to empower people with information that leads them to better health, these clinicians and researchers are willing to engage with the media in their area of expertise.

About the National Coagulation Centre at St James’s Hospital

The National Coagulation Centre (NCC) is a designated European Haemophilia Comprehensive Care Centre which provides comprehensive care with a multidisciplinary approach for inherited and acquired bleeding and clotting disorders. The NCC encompasses the National Coagulation Laboratory (where all testing nationally is carried out for VITT) and the Haemostasis Molecular Diagnostic Laboratory, which provides genetic testing nationally for children and adults with bleeding disorders. People with a wide range of bleeding and clotting disorders attend the NCC by referral for investigation, diagnosis, long-term management and family screening.

Media Contact
Paula Curtin
[email protected]

Related Journal Article

http://dx.doi.org/10.1111/bjh.17613

Tags: Critical Care/Emergency MedicineHealth ProfessionalsHematologyImmunology/Allergies/AsthmaInfectious/Emerging DiseasesMedicine/HealthPublic HealthPulmonary/Respiratory MedicineVaccines
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