Weight-Adjusted vs Fixed Low Doses of Low Molecular Weight Heparin For Venous Thromboembolism Prevention in COVID-19

Summary

Worldwide observational studies indicate a significant prothrombogenic effect associated with SARS-CoV-2 infection with a high incidence of venous thromboembolism (VTE), notably life-threatening pulmonary embolism. According to recommendations for acute medical illnesses, all COVID-19 hospitalized patients should be given VTE prophylaxis such as a low molecular weight heparin (LMWH). A standard prophylactic dose (eg. Enoxaparin 4000IU once daily) could be insufficient in obese patients and VTE has been reported in patients treated with a standard prophylactic dose. In COVID-19 patients, guidelines from several international societies confirm the existence of an hypercoagulability and the importance of thromboprophylaxis but the "optimal dose is unknown" and comparative studies are needed. In view of these elements, carrying out a trial comparing various therapeutic strategies for the prevention of VTE in hospitalized patients with COVID-19 constitutes a health emergency. Thus, we hypothesize that an increased prophylactic dose of weight-adjusted LMWH would be greater than a lower prophylactic dose of LMWH to reduce the risk of life-threatening VTE in hospitalized patients. The benefit-risk balance of this increase dose will be carefully evaluated because of bleeding complications favored by possible renal / hepatic dysfunctions, drug interactions or invasive procedures in COVID-19 patients. This multicenter randomized (1:1) open-label controlled trial will randomize hospitalized adults with COVID-19 infection to weight-adjusted prophylactic dose vs. lower prophylactic dose of LMWH.

Timeline

Start

2020-05-13

Primary completion

2021-04-29

Completion

2021-09-14

Publications

• Results Zuily S, Lefevre B, Sanchez O, Empis de Vendin O, de Ciancio G, Arlet JB, Khider L, Terriat B, Greigert H, Robert CS, Louis G, Trinh-Duc A, Rispal P, Accassat S, Thiery G, Montani D, Azarian R, Meneveau N, Soudet S, Le Mao R, Maurier F, Le Moing V, Quere I, Yelnik CM, Lefebvre N, Martinot M, Delrue M, Benhamou Y, Parent F, Roy PM, Presles E, Goehringer F, Mismetti P, Bertoletti L, Rossignol P, Couturaud F, Wahl D, Thilly N, Laporte S; COVI-DOSE investigators. Effect of weight-adjusted intermediate-dose versus fixed-dose prophylactic anticoagulation with low-molecular-weight heparin on venous thromboembolism among noncritically and critically ill patients with COVID-19: the COVI-DOSE trial, a multicenter, randomised, open-label, phase 4 trial. EClinicalMedicine. 2023 Jun;60:102031. doi: 10.1016/j.eclinm.2023.102031. Epub 2023 Jun 9.
• Flumignan RL, Civile VT, Tinoco JDS, Pascoal PI, Areias LL, Matar CF, Tendal B, Trevisani VF, Atallah AN, Nakano LC. Anticoagulants for people hospitalised with COVID-19: a rapid review. Cochrane Database Syst Rev. 2022 Mar 4;3(3):CD013739. doi: 10.1002/14651858.CD013739.pub2.
• Flumignan RL, Tinoco JDS, Pascoal PI, Areias LL, Cossi MS, Fernandes MI, Costa IK, Souza L, Matar CF, Tendal B, Trevisani VF, Atallah AN, Nakano LC. Prophylactic anticoagulants for people hospitalised with COVID-19. Cochrane Database Syst Rev. 2020 Oct 2;10(10):CD013739. doi: 10.1002/14651858.CD013739.

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