Assays for and Reversal of New Anticoagulants

April 30, 2013 updated by: R.P.Herrmann

Development of Anticoagulant Assays for New Anticoagulants and Their Reversibility in Vitro

New anticoagulants are being introduced to replace warfarin. These drugs do not require monitoring and are safer. There is currently no recommended way to reverse these drugs rapidly in the event of undue bleeding or need for emergency surgery. This is a lab study to look at ways to reverse the drugs rapidly

Study Overview

Status

Completed

Conditions

Detailed Description

We are developing in vitro assays of measurement of the effect of these drugs on the relevant coagulation pathways in plasma; such assays are not widely established. This will then allow us to test potential reversing agents such as activated Factor VII (Novo-Seven®), or Factor VIII inhibitor bypassing agent (FEIBA) for their ability to reverse these anti-coagulants invitro. The aims of this reversal research strategy is to provide a means whereby patients who present with serious bleeding or who need rapid reversal for surgery, for example, can be offered such treatment to allow rapid normalisation of their coagulation system.

As part of this developmental programme, we wish to obtain samples from patients receiving Rivaroxaban or Dabigatran for therapeutic reasons, to test the effect of the respective drug on the relevant coagulation factors and to test in vitro reversibility.

The only requirement for the patient is to have an extra 20ml of blood taken at a time when the patient is having other blood tests. There are no risks or experimental procedures planned to be carried out on patients.

Study Type

Observational

Enrollment (Actual)

30

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Australia
    • Western Australia
      • Perth, Western Australia, Australia, 6000
        • Royal Perth Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with atrial fibrillation receiving dabigatran for thrombosis prevention or patients with osteoarthritis of the hip or knee receiving rivaroxaban after total hip or knee replacement respectively for thrombosis prevention

Description

Inclusion Criteria:

  • Receiving dabigatran for atrial fibrillation
  • Or,for osteoarthritis of the hip or knee receiving rivaroxaban to prevent thromboembolic disease after total hip or knee replacement respectively

Exclusion Criteria:

  • Failure to sign informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Patients receiving a new anticoagulant
Patients are receiving dabigatran for atrial fibrillation or rivaroxaban for osteoarthritis of hip or knee undergoing total hip or knee replacement respectively

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ability to reverse anticoagulant effect in vitro of dabigatran or rivarovaban
Time Frame: Two hours after ingestion of anticoagulant dose
The ability of nonspecific coagulation factors to reverse anticoagulant effect in vitro as measured by dilute thrombin time, Calibrated automated thrombinoscope, thromboelastogram and Rotem
Two hours after ingestion of anticoagulant dose

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

R.P.Herrmann

Investigators

  • Principal Investigator: Ross I Baker, MB, BS, Royal Perth Hospital, Wellington St, Perth, Australia

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2012

Primary Completion (Actual)

April 1, 2013

Study Completion (Actual)

April 1, 2013

Study Registration Dates

First Submitted

February 14, 2013

First Submitted That Met QC Criteria

February 18, 2013

First Posted (Estimate)

February 21, 2013

Study Record Updates

Last Update Posted (Estimate)

May 3, 2013

Last Update Submitted That Met QC Criteria

April 30, 2013

Last Verified

April 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2011/117

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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