Thrombosis — Practice Variation on Antithrombotics in COVID-19
Citation(s)
Chandra A, Chakraborty U, Ghosh S, Dasgupta S Anticoagulation in COVID-19: current concepts and controversies. Postgrad Med J. 2021 Apr 13. pii: postgradmedj-2021-139923. doi: 10.1136/postgradmedj-2021-139923. [Epub ahead of print] Review.
Fontelo P, Bastola MM, Zheng Z, Baik SH A review of thromboembolic events in hospitalized COVID-19 patients. Thromb J. 2021 Jun 29;19(1):47. doi: 10.1186/s12959-021-00298-3. Review.
Liu Y, Cai J, Wang C, Jin J, Qu L A systematic review and meta-analysis of incidence, prognosis, and laboratory indicators of venous thromboembolism in hospitalized patients with coronavirus disease 2019. J Vasc Surg Venous Lymphat Disord. 2021 Sep;9(5):1099-1111.e6. doi: 10.1016/j.jvsv.2021.01.012. Epub 2021 Jan 30.
Current Practices on Antithrombotic Therapy in Hospitalised and Discharged Patients With COVID-19
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
