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CompletedNCT04646655EMOS-COVIDUpdated Jul 25, 2023

Enoxaparin at Prophylactic or Therapeutic Doses in COVID-19

A Phase 3 interventional study of Enoxaparin in Covid19 and Thrombosis, sponsored by ASST Fatebenefratelli Sacco. Completed at 1 site in Italy. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2023-07-25.

Sponsored by ASST Fatebenefratelli Sacco · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Registered 3 months after the study started (first participant enrolled Jul 2020, registered Nov 2020).
Phase
Phase 3
Study type
Interventional
Enrollment
142
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

SINGLE CENTER PHASE III INTERVENTIONAL RANDOMIZED CONTROLLED TRIAL comparing efficacy and safety of enoxaparin at prophylactic dose (standard treatment) and enoxaparin at therapeutic dose (OFF-LABEL treatment) in 300 COVID-19 infected patients with moderate-severe respiratory failure (PaO2/FiO2\<250) and/or increased D-dimer levels enrolled in different Units (Infectious disease, Internal Medicine, Emergency Medicine, Pneumology) of Azienda Socio Sanitaria Territoriale Fatebenefratelli Sacco (ASST-FBF-SACCO).

Read the detailed description

Patients with COVID-19 are at high risk of developing a venous thromboembolism (VTE) and it is essential that effective thromboprophylaxis with parenteral drugs (LMWH, UFH) is considered for all patients admitted to hospital especially in case of severe pneumonia.

The aim of the study is the evaluation of efficacy and safety of enoxaparin at prophylactic dose (standard treatment) as compared to enoxaparin at therapeutic dose (OFF-LABEL treatment) in 300 COVID-19 infected patients with moderate-severe respiratory failure (PaO2/FiO2\<250) and/or increased D-dimer levels.

After the admission to different Units (Infectious disease, Internal Medicine, Emergency Medicine, Pneumology), enoxaparin at prophylactic dose (standard of care) will be prescribed to all patients.

The randomization of the single patient will be made when the the inclusion criteria (PaO2/FiO2 \<250 and/or D-dimer >2000 ng/) will be satisfied. Patients with increased bleeding risk will be excluded (exclusion criteria).

Patients will be divided into two arms:

  • arm A: enoxaparin at prophylactic dose (standard 4.000 IU; 6000 UI if body weight>100 kg)
  • arm B: enoxaparin at therapeutic dose (70 U/Kg b.i.d. every 12 h)

In both arms, enoxaparin treatment will be monitored clinically and with first and second line laboratory tests Venous compression ultrasound (CUS) will be performed at admission and after 7 days in case of a first negative exam and elevated D-Dimer levels, to rule out deep vein thrombosis.

Enoxaparin at prophylactic dose (4000 IU) will be maintained in all patients for 4 weeks after discharge.

02

Conditions studied

  • Covid19
  • Thrombosis

Keywords

  • COVID.19
  • Thrombosis
  • Enoxaparin
  • Outcome
  • Respiratory failure
  • D-dimer
  • Venous compression ultrasound
03

In context

COVID-19

7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.

This study's enrollment of 142 is above the median of 100 across 4,098 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

ASST Fatebenefratelli Sacco is the lead sponsor of 36 studies on the registry; 12 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • COVID-19 related pneumonia with moderate-severe respiratory failure (PaO2/FiO2\<250) and/or markedly increased D-dimer level (>2000 ng/mL)
  • Signed informed consent

Exclusion criteria

Exclusion Criteria:

  • age \< 18 and > 80 yrs
  • history of bleeding (peptic ulcer, esophageal varices, cerebral aneurysm, cancer at high risk of bleeding, cirrhosis, hemorrhagic stroke \< 1 year)
  • thrombocytopenia (\<100 x109/L)
  • anemia (Hb \< 8 g/dl)
  • coagulation abnormalities (PT e/o aPTT > 1.5; fibrinogen \< 150 mg/dl)
  • consumption coagulopathy (ISTH criteria) [15, 16]
  • deep vein thrombosis or pulmonary embolism
  • dual antiplatelet therapy
  • ongoing anticoagulant therapy
  • allergic reaction to LMWH
  • previous heparin-induced thrombocytopenia
  • major surgery \< 1 month; neurosurgery \<3 months; eye surgery \<3 months
  • pregnancy
  • arterial hypertension (SBPS>160 mm Hg; DBP>100 mm Hg)
  • renal failure (creatinine clearance 30 ml/min)
  • ICU admission or endotracheal intubation
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
142 participants (actual)

Study arms

  • Active comparator
    Enoxaparin at prophylactic dose

    Enoxaparin at prophylactic dose: standard 4.000 IU QD via subcutaneous injection (6000 IU if body weight\>100 kg)

    Drug: Enoxaparin

  • Experimental
    Enoxaparin at therapeutic dose

    Enoxaparin at therapeutic dose : 70 U/Kg b.i.d. (every 12 h) In order to easily calculate the correct therapeutic dose of enoxaparin for each patient, a simplified categorization will be applied, as follows: * weight \< 65 Kg: 4.000 IU b.i.d. (every 12 h) * weight ≥ 65 Kg: 6.000 IU b.i.d. (every 12 h) * weight ≥ 100 Kg: 8.000 IU b.i.d. (every 12 h) The most appropriate dose will be evaluated in patients with creatinine clearance between 30 and 50 ml/min

    Drug: Enoxaparin

Interventions

  • DrugEnoxaparin

    subcutaneous injections

    Also known as: Clexane

06

What researchers measure

Primary outcomes

  1. Mortality rate

    Mortality registered during the time frame

    Time frame: 30 days from enrollment

  2. Progression of respiratory failure

    Progression of respiratory failure defined as duration of continuous positive pressure ventilation (CPAP)

    Time frame: 30 days from enrollment

  3. Progression of respiratory failure

    Progression of respiratory failure defined as percentage of patients admitted to ICU

    Time frame: 30 days from enrollment

  4. Progression of respiratory failure

    Progression of respiratory failure defined as percentage of patients undergoing oro-tracheal intubation

    Time frame: 30 days from enrollment

  5. Number of major bleeding episodes

    Major bleeding (ISTH criteria) and/or clinically relevant non-major bleeding

    Time frame: up to 6 months from randomization

Secondary outcomes

  1. Respiratory function improvement

    Amelioration of the respiratory function defined as a PaO2/FiO2 increase \> 300 and / or respiratory rate (RR) \< 20 breaths per min

    Time frame: at 72 hours

  2. Respiratory function improvement

    Amelioration of the respiratory function defined as a PaO2/FiO2 increase \> 300 and / or respiratory rate (RR) \< 20 breaths per min

    Time frame: 1 week from randomization

  3. Number of major cardiovascular events

    numbers of myocardial infarction and stroke within the time frame

    Time frame: 6 months from randomization

  4. Deep Vein Thrombosis

    Numbers of Deep Vein Thrombosis at CUS examination within the time frame

    Time frame: 6 months from randomization

07

Study locations

1 site
  • ASST Fatebenefratelli Sacco
    Milan, 20157, Italy
08

References and documents

Publications

  • Han H, Yang L, Liu R, Liu F, Wu KL, Li J, Liu XH, Zhu CL. Prominent changes in blood coagulation of patients with SARS-CoV-2 infection. Clin Chem Lab Med. 2020 Jun 25;58(7):1116-1120. doi: 10.1515/cclm-2020-0188. PubMed 32172226 ↗
  • Tang N, Li D, Wang X, Sun Z. Abnormal coagulation parameters are associated with poor prognosis in patients with novel coronavirus pneumonia. J Thromb Haemost. 2020 Apr;18(4):844-847. doi: 10.1111/jth.14768. Epub 2020 Mar 13. PubMed 32073213 ↗
  • Zhou F, Yu T, Du R, Fan G, Liu Y, Liu Z, Xiang J, Wang Y, Song B, Gu X, Guan L, Wei Y, Li H, Wu X, Xu J, Tu S, Zhang Y, Chen H, Cao B. Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study. Lancet. 2020 Mar 28;395(10229):1054-1062. doi: 10.1016/S0140-6736(20)30566-3. Epub 2020 Mar 11. Erratum In: Lancet. 2020 Mar 28;395(10229):1038. doi: 10.1016/S0140-6736(20)30606-1. Lancet. 2020 Mar 28;395(10229):1038. doi: 10.1016/S0140-6736(20)30638-3. PubMed 32171076 ↗
  • Wu C, Chen X, Cai Y, Xia J, Zhou X, Xu S, Huang H, Zhang L, Zhou X, Du C, Zhang Y, Song J, Wang S, Chao Y, Yang Z, Xu J, Zhou X, Chen D, Xiong W, Xu L, Zhou F, Jiang J, Bai C, Zheng J, Song Y. Risk Factors Associated With Acute Respiratory Distress Syndrome and Death in Patients With Coronavirus Disease 2019 Pneumonia in Wuhan, China. JAMA Intern Med. 2020 Jul 1;180(7):934-943. doi: 10.1001/jamainternmed.2020.0994. Erratum In: JAMA Intern Med. 2020 Jul 1;180(7):1031. doi: 10.1001/jamainternmed.2020.1429. PubMed 32167524 ↗
  • Chen N, Zhou M, Dong X, Qu J, Gong F, Han Y, Qiu Y, Wang J, Liu Y, Wei Y, Xia J, Yu T, Zhang X, Zhang L. Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study. Lancet. 2020 Feb 15;395(10223):507-513. doi: 10.1016/S0140-6736(20)30211-7. Epub 2020 Jan 30. PubMed 32007143 ↗
  • McGonagle D, Sharif K, O'Regan A, Bridgewood C. The Role of Cytokines including Interleukin-6 in COVID-19 induced Pneumonia and Macrophage Activation Syndrome-Like Disease. Autoimmun Rev. 2020 Jun;19(6):102537. doi: 10.1016/j.autrev.2020.102537. Epub 2020 Apr 3. PubMed 32251717 ↗
  • Tang N, Bai H, Chen X, Gong J, Li D, Sun Z. Anticoagulant treatment is associated with decreased mortality in severe coronavirus disease 2019 patients with coagulopathy. J Thromb Haemost. 2020 May;18(5):1094-1099. doi: 10.1111/jth.14817. Epub 2020 Apr 27. PubMed 32220112 ↗
  • Iba T, Nisio MD, Levy JH, Kitamura N, Thachil J. New criteria for sepsis-induced coagulopathy (SIC) following the revised sepsis definition: a retrospective analysis of a nationwide survey. BMJ Open. 2017 Sep 27;7(9):e017046. doi: 10.1136/bmjopen-2017-017046. PubMed 28963294 ↗
  • Young E. The anti-inflammatory effects of heparin and related compounds. Thromb Res. 2008;122(6):743-52. doi: 10.1016/j.thromres.2006.10.026. Epub 2007 Aug 28. PubMed 17727922 ↗
  • Poterucha TJ, Libby P, Goldhaber SZ. More than an anticoagulant: Do heparins have direct anti-inflammatory effects? Thromb Haemost. 2017 Feb 28;117(3):437-444. doi: 10.1160/TH16-08-0620. Epub 2016 Dec 15. PubMed 27975101 ↗
  • Mousavi S, Moradi M, Khorshidahmad T, Motamedi M. Anti-Inflammatory Effects of Heparin and Its Derivatives: A Systematic Review. Adv Pharmacol Sci. 2015;2015:507151. doi: 10.1155/2015/507151. Epub 2015 May 12. PubMed 26064103 ↗
  • Thachil J. The versatile heparin in COVID-19. J Thromb Haemost. 2020 May;18(5):1020-1022. doi: 10.1111/jth.14821. Epub 2020 Apr 27. No abstract available. PubMed 32239799 ↗
  • Milewska A, Zarebski M, Nowak P, Stozek K, Potempa J, Pyrc K. Human coronavirus NL63 utilizes heparan sulfate proteoglycans for attachment to target cells. J Virol. 2014 Nov;88(22):13221-30. doi: 10.1128/JVI.02078-14. Epub 2014 Sep 3. PubMed 25187545 ↗
  • Barrett CD, Moore HB, Yaffe MB, Moore EE. ISTH interim guidance on recognition and management of coagulopathy in COVID-19: A comment. J Thromb Haemost. 2020 Aug;18(8):2060-2063. doi: 10.1111/jth.14860. Epub 2020 Jun 14. No abstract available. PubMed 32302462 ↗
  • Wada H, Thachil J, Di Nisio M, Mathew P, Kurosawa S, Gando S, Kim HK, Nielsen JD, Dempfle CE, Levi M, Toh CH; The Scientific Standardization Committee on DIC of the International Society on Thrombosis Haemostasis. Guidance for diagnosis and treatment of DIC from harmonization of the recommendations from three guidelines. J Thromb Haemost. 2013 Feb 4. doi: 10.1111/jth.12155. Online ahead of print. PubMed 23379279 ↗
  • Schulman S, Kearon C; Subcommittee on Control of Anticoagulation of the Scientific and Standardization Committee of the International Society on Thrombosis and Haemostasis. Definition of major bleeding in clinical investigations of antihemostatic medicinal products in non-surgical patients. J Thromb Haemost. 2005 Apr;3(4):692-4. doi: 10.1111/j.1538-7836.2005.01204.x. PubMed 15842354 ↗
  • Ackermann M, Verleden SE, Kuehnel M, Haverich A, Welte T, Laenger F, Vanstapel A, Werlein C, Stark H, Tzankov A, Li WW, Li VW, Mentzer SJ, Jonigk D. Pulmonary Vascular Endothelialitis, Thrombosis, and Angiogenesis in Covid-19. N Engl J Med. 2020 Jul 9;383(2):120-128. doi: 10.1056/NEJMoa2015432. Epub 2020 May 21. PubMed 32437596 ↗
  • Helms J, Tacquard C, Severac F, Leonard-Lorant I, Ohana M, Delabranche X, Merdji H, Clere-Jehl R, Schenck M, Fagot Gandet F, Fafi-Kremer S, Castelain V, Schneider F, Grunebaum L, Angles-Cano E, Sattler L, Mertes PM, Meziani F; CRICS TRIGGERSEP Group (Clinical Research in Intensive Care and Sepsis Trial Group for Global Evaluation and Research in Sepsis). High risk of thrombosis in patients with severe SARS-CoV-2 infection: a multicenter prospective cohort study. Intensive Care Med. 2020 Jun;46(6):1089-1098. doi: 10.1007/s00134-020-06062-x. Epub 2020 May 4. PubMed 32367170 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 25, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04646655
Lead sponsor
ASST Fatebenefratelli Sacco
Collaborators
Massimo Arquati, Riccardo Colombo, Umberto Russo, Manuela Nebuloni, Spinello Antinori
Responsible party
Maddalena Alessandra Wu (Principal Investigator, ASST Fatebenefratelli Sacco) — Principal investigator
First posted
Nov 30, 2020
Start date
Jul 27, 2020
Primary completion
Oct 16, 2022
Completion
Apr 30, 2023
Last update
Jul 25, 2023

Study contacts

Maddalena A Wu, M.D.
principal investigator · ASST Fatebenefratelli Sacco

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jul 2023. You cannot join it, but the record below documents what was studied.

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