Impact of High-Dose Prophylactic Anticoagulation in Critically Ill Patients With COVID-19 Pneumonia

Charles Tacquard, Alexandre Mansour, Alexandre Godon, Julien Godet, Julien Poissy, Delphine Garrigue, Eric Kipnis, Sophie Rym Hamada, Paul Michel Mertes, Annick Steib, Mathilde Ulliel-Roche, Bélaïd Bouhemad, Maxime Nguyen, Florian Reizine, Isabelle Gouin-Thibault, Marie Charlotte Besse, Nived Collercandy, Stefan Mankikian, Jerrold H Levy, Yves Gruel, Pierre Albaladejo, Sophie Susen, Anne Godier, French Working Group on Perioperative Hemostasis, P Albaladejo, N Blais, F Bonhomme, A Borel-Derlon, A Cohen, J-P Collet, E de Maistre, P Fontana, D Garrigue Huet, A Godier, Y Gruel, A Godon, B Ickx, S Laporte, D Lasne, J Llau, G Le Gal, T Lecompte, S Lessire, J H Levy, D Longrois, S Madi-Jebara, A Mansour, M Mazighi, P Mismetti, P E Morange, S Motte, F Mullier, N Nathan, P Nguyen, G Pernod, N Rosencher, S Roullet, P M Roy, S Schlumberger, P Sié, A Steib, S Susen, C A Tacquard, S Testa, A Vincentelli, P Zufferey, Charles Tacquard, Alexandre Mansour, Alexandre Godon, Julien Godet, Julien Poissy, Delphine Garrigue, Eric Kipnis, Sophie Rym Hamada, Paul Michel Mertes, Annick Steib, Mathilde Ulliel-Roche, Bélaïd Bouhemad, Maxime Nguyen, Florian Reizine, Isabelle Gouin-Thibault, Marie Charlotte Besse, Nived Collercandy, Stefan Mankikian, Jerrold H Levy, Yves Gruel, Pierre Albaladejo, Sophie Susen, Anne Godier, French Working Group on Perioperative Hemostasis, P Albaladejo, N Blais, F Bonhomme, A Borel-Derlon, A Cohen, J-P Collet, E de Maistre, P Fontana, D Garrigue Huet, A Godier, Y Gruel, A Godon, B Ickx, S Laporte, D Lasne, J Llau, G Le Gal, T Lecompte, S Lessire, J H Levy, D Longrois, S Madi-Jebara, A Mansour, M Mazighi, P Mismetti, P E Morange, S Motte, F Mullier, N Nathan, P Nguyen, G Pernod, N Rosencher, S Roullet, P M Roy, S Schlumberger, P Sié, A Steib, S Susen, C A Tacquard, S Testa, A Vincentelli, P Zufferey

Abstract

Background: Because of the high risk of thrombotic complications (TCs) during SARS-CoV-2 infection, several scientific societies have proposed to increase the dose of preventive anticoagulation, although arguments in favor of this strategy are inconsistent.

Research question: What is the incidence of TC in critically ill patients with COVID-19 and what is the relationship between the dose of anticoagulant therapy and the incidence of TC?

Study design and methods: All consecutive patients referred to eight French ICUs for COVID-19 were included in this observational study. Clinical and laboratory data were collected from ICU admission to day 14, including anticoagulation status and thrombotic and hemorrhagic events. The effect of high-dose prophylactic anticoagulation (either at intermediate or equivalent to therapeutic dose), defined using a standardized protocol of classification, was assessed using a time-varying exposure model using inverse probability of treatment weight.

Results: Of 538 patients included, 104 patients experienced a total of 122 TCs with an incidence of 22.7% (95% CI, 19.2%-26.3%). Pulmonary embolism accounted for 52% of the recorded TCs. High-dose prophylactic anticoagulation was associated with a significant reduced risk of TC (hazard ratio, 0.81; 95% CI, 0.66-0.99) without increasing the risk of bleeding (HR, 1.11; 95% CI, 0.70-1.75).

Interpretation: High-dose prophylactic anticoagulation is associated with a reduction in thrombotic complications in critically ill patients with COVID-19 without an increased risk of hemorrhage. Randomized controlled trials comparing prophylaxis with higher doses of anticoagulants are needed to confirm these results.

Trial registry: ClinicalTrials.gov; No.: NCT04405869; URL: www.clinicaltrials.gov.

Keywords: COVID-19; anticoagulation; bleeding; thrombosis.

Copyright © 2021 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.

Figures

Figure 1
Figure 1
Diagram showing retrospective classification of the level of anticoagulation for thromboprophylaxis. This algorithm was used at each time point to classify the patient into either standard or high-dose prophylactic anticoagulation. A patient could change category between two time points several times during the study period. LWMH = low-molecular-weight heparin; UFH = unfractionated heparin.

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Source: PubMed

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