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Anticoagulation-free ECMO for Respiratory Insufficiency (A-FREE ECMO Trial)

Phase 2 & 3
Waitlist Available
Led By Damian Ratano, MD
Research Sponsored by Damian Ratano
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Adult patient with ARDS on VV-ECMO
Be older than 18 years old
Must not have
Contraindication to anticoagulation with UFH (known heparin-induced thrombocytopenia, active hemorrhage, any surgery precluding the use of anticoagulation)
Indication for therapeutic anticoagulation (pulmonary embolism or deep vein thrombosis, chronic anticoagulation therapy before ECMO insertion)
Timeline
Screening 3 weeks
Treatment Varies
Follow Up through ecmo completion, an average of 14 days
Awards & highlights
No Placebo-Only Group
All Individual Drugs Already Approved
Approved for 20 Other Conditions

Summary

This trial is testing whether it is safe to use ECMO without anticoagulation for ARDS patients.

Who is the study for?
This trial is for adults with Acute Respiratory Distress Syndrome (ARDS) who are on VV-ECMO treatment. It's not open to those with a history of heparin-induced thrombocytopenia, active bleeding, recent surgeries that don't allow anticoagulation, or if they need anticoagulants for other conditions like blood clots.
What is being tested?
The study is testing the safety and feasibility of using VV-ECMO without the standard blood-thinning medication (therapeutic anticoagulation). Participants will receive subcutaneous Heparin instead to see if it can prevent clotting complications safely.
What are the potential side effects?
Potential side effects may include risks associated with not using therapeutic anticoagulants such as clot formation in the ECMO circuit or patient's body. Subcutaneous Heparin could cause bruising at injection sites, bleeding issues, or allergic reactions.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
Select...
I am an adult with ARDS and am on a VV-ECMO machine.

Exclusion Criteria

You may be eligible for the trial if you check “No” for criteria below:
Select...
I cannot take heparin due to allergies, bleeding, or recent surgery.
Select...
I am on blood thinners for a clot in my lung or leg.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~through ecmo completion, an average of 14 days
This trial's timeline: 3 weeks for screening, Varies for treatment, and through ecmo completion, an average of 14 days for reporting.

Treatment Details

Study Objectives

Study objectives can provide a clearer picture of what you can expect from a treatment.
Primary study objectives
Extracorporeal Membrane Oxygenation
Secondary study objectives
Hemorrhagic complications
Other study objectives
Amount of clot and fibrin visualized in the pre- and post-membrane side
Coagulation parameters on ECMO
Increase in d-dimer levels
+1 more

Awards & Highlights

No Placebo-Only Group
All patients enrolled in this study will receive some form of active treatment.
All Individual Drugs Already Approved
Therapies where all constituent drugs have already been approved are likely to have better-understood side effect profiles.
Approved for 20 Other Conditions
This treatment demonstrated efficacy for 20 other conditions.

Trial Design

2Treatment groups
Experimental Treatment
Active Control
Group I: No anticoagulationExperimental Treatment1 Intervention
Participants in this arm will not receive unfractionated heparin during the course of ECMO. They will receive standard venous thromboembolism prophylaxis with subcutaneous enoxaparin or unfractionated heparin
Group II: Anticoagulation, ECMO standard of careActive Control1 Intervention
Participants in this arm will receive the standard of care anticoagulation with unfractionated heparin during the course of ECMO.

Find a Location

Who is running the clinical trial?

PSI Foundation, Toronto, OntarioUNKNOWN
Damian RatanoLead Sponsor
1 Previous Clinical Trials
61 Total Patients Enrolled
Damian Ratano, MDPrincipal InvestigatorUniversity Health Network, Toronto
1 Previous Clinical Trials
61 Total Patients Enrolled

Media Library

Subcutaneous Heparin Clinical Trial Eligibility Overview. Trial Name: NCT04273607 — Phase 2 & 3
Extracorporeal Membrane Oxygenation Research Study Groups: Anticoagulation, ECMO standard of care, No anticoagulation
Extracorporeal Membrane Oxygenation Clinical Trial 2023: Subcutaneous Heparin Highlights & Side Effects. Trial Name: NCT04273607 — Phase 2 & 3
Subcutaneous Heparin 2023 Treatment Timeline for Medical Study. Trial Name: NCT04273607 — Phase 2 & 3
~13 spots leftby Nov 2025