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Trial registered on ANZCTR
Registration number
ACTRN12615000311550
Ethics application status
Not yet submitted
Date submitted
24/02/2015
Date registered
2/04/2015
Date last updated
2/04/2015
Type of registration
Prospectively registered
Titles & IDs
Public title
Examining the effect of Tranexamic Acid (TXA) on the functional fibrinolysis assay in patients with hereditary bleeding disorder (HBD) compared with healthy controls.
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Scientific title
Examining the effect of 1g of Tranexamic Acid (TXA) on the functional fibrinolysis assay in patients with hereditary bleeding disorder (HBD) who are having dental or endoscopic procedures compared with healthy controls.
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Secondary ID [1]
286246
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Nil
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Hereditary Bleeding Disorder (Haemophilia A and B, Von Willebrand disease)
294301
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Condition category
Condition code
Blood
294623
294623
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0
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Clotting disorders
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Human Genetics and Inherited Disorders
294812
294812
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0
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Other human genetics and inherited disorders
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Enrolled patients will ingest one gram of oral tranexamic acid at least 1 hour prior to the procedure (dental or endoscopic) and blood will be collected immediately before and 4 hours post ingestion. Plasma samples will be prepared and stored for evaluation of fibrinolysis utilising contemporary clot lysis assay. Correlation of the results will be made with clinical bleeding as reported by the proceduralist who are blinded to the results.
Tranexamic acid administration will be supervised, only one dose will be given to control and patient group.
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Intervention code [1]
291262
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Treatment: Drugs
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Comparator / control treatment
Healthy volunteer subjects will also take a oral dose of one gram of tranexamic acid and have similar plasma samples collected at 2, 4 and 8 hours post ingestion..
They will not be undergoing an invasive procedure.
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Control group
Active
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Outcomes
Primary outcome [1]
294387
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We aim to evaluate the impact of TXA on functional fibrionolysis by enrolling patients with hereditary bleeding disorders and healthy controls into the proposed study.
In this study we will examine the rate of clot lysis using the new clot lysis assay. The principle of this turbidometric assay is continuous monitoring of clot formation and lysis by light transmission at 405 nm in a 96 well plate.
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Assessment method [1]
294387
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Timepoint [1]
294387
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Baseline and at 4 hours after ingestion of 1 gram of Tranexamic acid for patient group and baseline, 2, 4 and 8 hours for control group.
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Secondary outcome [1]
313639
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NA
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Assessment method [1]
313639
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Timepoint [1]
313639
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NA
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Eligibility
Key inclusion criteria
One of Hereditary Bleeding Disorder = Haemophilia A, Haemophilia B, or rarer coagulation factor deficiencies {such as factor XI deficiency} and von Willebrand Disease)
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Minimum age
18
Years
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Maximum age
65
Years
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Pregnant or breastfeeding
Past history of thrombosis
Past history of renal disease
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
20/04/2015
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Actual
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Date of last participant enrolment
Anticipated
1/01/2016
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
20
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
3538
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The Alfred - Prahran
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Recruitment postcode(s) [1]
9340
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3181 - Prahran
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Funding & Sponsors
Funding source category [1]
290808
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Charities/Societies/Foundations
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Name [1]
290808
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Australian Haemophilia Centre Directors' Organisation (AHCDO) John Lloyd Clinical Excellence fund
The Fund is a Special Fund under the control and financial management of AHCDO and was created for the purposes of haemophilia research in Australia.
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Address [1]
290808
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Australian Haemophilia Centre
Directors' Organisation
The Royal Adelaide Hospital
North Terrace
Adelaide
SA 5000
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Country [1]
290808
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Australia
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Primary sponsor type
Hospital
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Name
Alfred Hospital
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Address
Commercial rd
Prahran VIC 3181
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Country
Australia
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Secondary sponsor category [1]
289495
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University
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Name [1]
289495
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Monash University
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Address [1]
289495
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Alfred campus
Commercial rd
Prahran VIC 3181
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Country [1]
289495
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Australia
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Ethics approval
Ethics application status
Not yet submitted
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Ethics committee name [1]
292434
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Alfred Hospital Ethics
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Ethics committee address [1]
292434
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Commercial Rd
Prahran VIC 3181
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Ethics committee country [1]
292434
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Australia
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Date submitted for ethics approval [1]
292434
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23/02/2015
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Approval date [1]
292434
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Ethics approval number [1]
292434
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Summary
Brief summary
It is routine practice at the Haemophilia Treatment Centre at The Alfred that patients who undergo dental extraction or low risk endoscopic procedures receive tranexamic acid (TXA) with or without factor concentrate replacement (depending on proceduralist determined bleeding risk). Despite clinical reports of no increased rate of bleeding utilising this strategy, the underlying biological mechanism has not been extensively explored. We aim to evaluate the impact of TXA on functional fibrionolysis by enrolling such patients and healthy controls into the proposed study.
Enrolled patients will ingest one gram of oral tranexamic acid on the day of procedure and blood will be collected immediately before and 4 hours post ingestion. Plasma samples will be prepared and stored for evaluation of fibrinolysis utilising contemporary clot lysis assay. Correlation of the results will be made with clinical bleeding as reported by the proceduralist who are blinded to the results. Healthy volunteer subjects will also take a dose of one gram of tranexamic acid and have plasma samples collected at 2,4, and 8 hours post ingestion.
Fibrinolysis will be measured using a light transmission based assay where thrombin and tissue plasminogen activator are added to the plasma. The expected effect of tranexamic acid is a delay in fibrinolysis in the control samples. In the patient samples, it is expected that clot formation will be impaired by the bleeding disorder but the tranexamic acid may similarly delay fibrinolysis when compared with controls.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
55258
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A/Prof Huyen Tran
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Address
55258
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Head of Haemostasis and Thrombosis Unit
Alfred Hospital
Commercial Rd
Prahran VIC 3181
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Country
55258
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Australia
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Phone
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+613 9076 2179
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Fax
55258
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Email
55258
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[email protected]
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Contact person for public queries
Name
55259
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Dr Isaac Goncalves
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Address
55259
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Haematology Unit
Alfred Hospital
Commercial Rd
Prahran VIC 3181
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Country
55259
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Australia
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Phone
55259
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+613 9076 2000
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Fax
55259
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Email
55259
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[email protected]
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Contact person for scientific queries
Name
55260
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Prof Robert Metcalf
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Address
55260
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Group Leader, Fibrinolysis and Gene Regulation Laboratory
Level 1, AMREP Bulding
The Alfred, Commercial Road
Prahran Victoria 3181
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Country
55260
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Australia
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Phone
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+61 3 99030133
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Fax
55260
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Email
55260
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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