Individualizing Hemophilia Bypassing Agent Therapy Utilizing Thromboelastography

September 24, 2024 updated by: Guy Young, Children's Hospital Los Angeles

Individualizing Bypassing Agent Therapy Utilizing TEG in Hemophilia Patients with Inhibitors

This pilot study will investigate the use of thromboelastograph (TEG) to determine the primary bypassing agent for the management of bleeding in children and adults severe hemophilia A patients with inhibitors.

The study will evaluate the TEG profile for each of the available bypassing agents (FEIBA and rFVIIa) in each participating patient, which will then determine which agent provides the most robust clot formation as measured by the TEG. This study will consist of screening visit and 2-4 pharmacokinetic studies to determine the "best" bypassing agent based on the TEG results. Patients will then be assigned that bypassing agent and dose for the treatment of their bleeding episodes (Prophylaxis or On-demand). Each patient will be then followed for a period of 6 months to monitor short-term safety of those patients whose bypassing agent was modified.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Currently, there are no laboratory assays that can assess the pharmaceutical activity of the available agents known collectively as bypassing agents, which negatively impacts the treating physician's ability to manage these patients, leaving decisions on the dosing regimen to trial and error. Both agents, FEIBA and recombinant activated factor VII (rFVIIa), are approved for the treatment of bleeding in inhibitor patients with recommended dosing regimens that are based on clinical trials. However, a significant amount of "experimenting" with other dosing regimens is used by physicians and patients.

The goal of this project is to demonstrate that TEG is an excellent biomarker for predicting, managing and individualizing the treatment with FEIBA and rFVIIa of this rare and difficult to treat patient population.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

4 years to 70 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Males, 4-60 years old, inclusive on Prophylaxis or On-Demand treatment
  2. Diagnosis of Hemophilia with active titer inhibitors (> 0.6 BU)
  3. Willing to alter their treatment regimen per study protocol

Exclusion Criteria:

  1. Bleeding disorder(s) other than hemophilia A with inhibitors
  2. Thrombocytopenia (platelet count <100,000K/µL)
  3. Any concurrent clinically significant major disease that, in the opinion of the investigator, would make the subject unsuitable for enrollment
  4. Participation within the past 30 days in a clinical study involving investigational drugs
  5. Planned major surgery within 30 days prior to screening or during the study period

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

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: Severe Hemophilia A subjects w/ inhibitors
Males age 4-70 years diagnosed with severe hemophilia A with inhibitors who are currently treated with prophylaxis or on-demand treatment will be enrolled.
Other: Thromboelastography-Guided Treatment Regimen
The thromboelastograph (TEG) will be used to determine the "best" bypassing agent for the management of subjects with severe hemophilia A with inhibitors. Patients will be assigned that bypassing agent and dose for the treatment of their bleeding episodes and subsequently will be followed for a period of 6 months to determine their annual bleeding rate.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Elastic properties of a forming clot using thromboelastograph to determine best bypassing agent
Time Frame: 6 months
This study will assess the feasibility of TEG-guided individualization of bypassing agent treatment of bleeding for severe hemophilia A patients with inhibitors.
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Thrombin generation assay measuring the formation of thrombin during clot formation
Time Frame: 6 months
Thrombin generation assays will be performed to provide additional evidence supporting the TEG-guided individualization of bypassing agent treatment.
6 months
Number of participants with treatment-related adverse events
Time Frame: 1 year
The study will monitor short-term safety of patients whose bypassing agent treatment has been modified.
1 year

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Children's Hospital Los Angeles

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Guy Young, MD, Children's Hospital Los Angeles

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2017

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 1, 2019

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2019

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 19, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 21, 2016

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 23, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 26, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 24, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2024

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CHLA-16-00501

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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.

Clinical Trials on Hemophilia a with Inhibitors

Clinical Trials on Thromboelastography-Guided Treatment Regimen

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings