Trial of Andexanet in Patients Receiving an Oral FXa Inhibitor Who Require Urgent Surgery

Stopped early · Phase 2

Conditions studied: Surgery

In brief

Prospective, open-label clinical trial to evaluate the efficacy and safety of andexanet alfa patients who require urgent surgery that have been anticoagulated with the FXa (activated factor X) inhibitors.

Key facts

Study ID

NCT04233073

Run by

Alexion Pharmaceuticals, Inc.

People needed

10

Starts

2021-06-27

Expected to finish

2022-01-25

Last updated by the study team

2023-03-22

Who can join

Age: 18 and older, up to 84. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• All of the following criteria must be met for the patient to be eligible:
• Either the patient or their medical proxy (or legal designee) has given written informed consent.
• Age ≥ 18 and < 85 years old.
• Requires urgent surgical intervention that must occur within 12 hours of consent, for which reversal of anti-fXa activity is judged necessary.
• Treatment with an oral FXa inhibitor (apixaban [last dose 2.5 mg or greater], rivaroxaban [last dose 10 mg or greater], edoxaban [last dose 30 mg or greater] or enoxaparin [≥ 1 mg/kg/d]):
• ≤ 15 hours prior to start of surgery.
• > 15 hours prior to start of surgery or unknown time from the last dose, if documented anti fXa activity is > 100 ng/mL (> 0.5 IU/mL for enoxaparin, or over the equivalent IU/mL threshold on a low molecular weight heparin assay; see Laboratory Manual) within 2 hours prior to consent. Note: Patients enrolled in this manner should receive a high-andexanet dosing regimen.
• Have a negative pregnancy test documented prior to enrollment (for women of childbearing potential).
• Willingness to use highly effective methods of contraception through 30 days following study drug dose (for female and male patients who are fertile).

You may not qualify if…

• If a patient meets any of the following criteria, he or she is not eligible:
• Surgery for which the risk of clinically meaningful uncontrolled or unmanageable bleeding is low.
• Acute life-threatening bleeding (ISTH criteria) at the time of Screening:
• The patient has acute-overt bleeding that is potentially life-threatening, e.g., with signs or symptoms of hemodynamic compromise, such as severe hypotension, poor skin perfusion, mental confusion, low urine output that cannot be otherwise explained.
• The patient has overt bleeding associated with a fall in hemoglobin level by ≥2g/dL, OR, a hemoglobin ≤8 g/dL if no baseline hemoglobin is available.
• The patient has acute bleeding in a critical area or organ, such as pericardial, intracranial, or intraspinal.
• Any surgical procedure that involves the intraoperative use of systemic, intravascular, unfractionated heparin.
• Primary procedure for efficacy assessment is a non-surgical interventional procedure (e.g, lumbar puncture, skin biopsy, cardiac catheterization, endoscopic retrograde cholangio-pancreatography).
• Expected survival of < 1 month due to comorbidity.
• Known "Do Not Resuscitate" order or similar advanced directive.
• The patient has a recent history (within 30 days prior to screening) of a diagnosed TE as follows: venous thromboembolism (including deep vein thrombosis, pulmonary embolism, intracardiac thrombus), myocardial infarction (including asymptomatic troponin elevations), disseminated intravascular coagulation, acute traumatic coagulopathy, cerebrovascular accident, transient ischemic attack, unstable angina pectoris hospitalization, or severe peripheral vascular disease.
• Acute decompensated heart failure or cardiogenic shock at the time of screening.
• The patient has sepsis or septic or severe hemorrhagic shock at the time of Screening.
• The patient has heparin-induced thrombocytopenia (with or without thrombosis).
• Inherited coagulopathy (e.g., anti-phospholipid antibody syndrome, protein C/S deficiency, Factor V Leiden) at time of Screening.
• Platelet count < 80,000/µL at the time of Screening.
• Last dose of apixaban < 2.5 mg, rivaroxaban < 10 mg, edoxaban < 30 mg, or enoxaparin 40 mg.
• The patient is pregnant or a lactating female.
• The patient has received any of the following drugs or blood products within 7 days of enrollment:
• Vitamin K antagonists (e.g., warfarin).
• Dabigatran.
• Prothrombin complex concentrate products (e.g., Kcentra®) or recombinant factor VIIa (e.g., NovoSeven®).
• Whole blood, plasma fractions. Note: Administration of tranexamic acid, platelets or packed red blood cells is not an exclusion criterion.
• The patient was treated with an investigational drug < 30 days prior to Screening.
• Prior treatment with andexanet.

Where it is running

• Clinical Trial Site — Tucson, Arizona, United States
• Clinical Trial Site — Long Beach, California, United States
• Clinical Trial Site — Moreno Valley, California, United States
• Clinical Trial Site — Washington D.C., District of Columbia, United States
• Clinical Trial Site — Sarasota, Florida, United States
• Clinical Trial Site — Tampa, Florida, United States
• Clinical Trial Site — Iowa City, Iowa, United States
• Clinical Trial Site — Boston, Massachusetts, United States
• Clinical Trial Site — Boston, Massachusetts, United States
• Clinical Trial Site — Camden, New Jersey, United States
• Clinical Trial Site — Staten Island, New York, United States
• Clinical Trial Site — Charlotte, North Carolina, United States
• Clinical Trial Site — Durham, North Carolina, United States
• Clinical Trial Site — Columbus, Ohio, United States
• Clinical Trial Site — Tulsa, Oklahoma, United States
• Clinical Trial Site — Portland, Oregon, United States
• Clinical Trial Site — Philadelphia, Pennsylvania, United States
• Clinical Trial Site — Pittsburgh, Pennsylvania, United States
• Clinical Trial Site — Pittsburgh, Pennsylvania, United States
• Clinical Trial Site — Graz, Austria
• Clinical Trial Site — Innsbruck, Austria
• Clinical Trial Site — Klagenfurt, Austria
• Clinical Trial Site — Vienna, Austria
• Clinical Trial Site — Clermont-Ferrand, France
• Clinical Trial Site — Phoenix, Arizona, United States

Full record on ClinicalTrials.gov

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