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Trial registered on ANZCTR
Registration number
ACTRN12609000187246
Ethics application status
Approved
Date submitted
24/02/2009
Date registered
17/04/2009
Date last updated
17/04/2009
Type of registration
Retrospectively registered
Titles & IDs
Public title
The Influence of Venous Tourniquet on Whole Blood Coagulation as Assessed by Thrombelastography (TEG)
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Scientific title
Measuring the effect of using a venous tourniquet for blood sampling on whole blood coagulation as assessed by thromboelastography in healthy volunteers
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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:
Disorders of coagulation
4379
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Condition category
Condition code
Blood
4625
4625
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0
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Clotting disorders
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Anaesthesiology
4626
4626
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0
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Anaesthetics
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
A single blood sample is taken from the antecubital fossa without the use of a venous tourniquet, using a 18g needle and 5 ml syringe. After a 5 minute period a second venous blood sample taken from the contralateral antecubital fossa. A venous tourniquet is use on this occasion for blood sampling. The tourniquet is applied for 30 seconds at 45mmHg prior venous puncture and released immediately after.This is also single venous puncture using a 18g needle and 5 ml syringe. This therefore forms a crossover study.
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Intervention code [1]
4111
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Diagnosis / Prognosis
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Comparator / control treatment
Collection of blood sample without a venous tourniquet as explained above.
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Control group
Active
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Outcomes
Primary outcome [1]
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Maximum clot strength as assessed by the thromboelastography (TEG) variable 'Maximum amplitude'
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Assessment method [1]
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Timepoint [1]
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The Maximum amplitude (TEG value) time point is variable between patients and is not fixed.
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Primary outcome [2]
5496
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Fibrinolysis, as assessed by thromboelastography and identified by the Lysis 30 and Lysis 60 variables.
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Assessment method [2]
5496
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Timepoint [2]
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The Lysis 30 and Lysis 60 (TEG values) time points are variable between patients and are not therefore fixed.
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Secondary outcome [1]
9257
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Initiation of clotting as assessed by thromboelastography and identified by the Reaction - time (R-time) variable.
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Assessment method [1]
9257
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Timepoint [1]
9257
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The Reaction - time (R-time) time point is variable between patients and is not therefore fixed.
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Eligibility
Key inclusion criteria
Healthy volunteers
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Minimum age
18
Years
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Maximum age
70
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
1. Prescription of any antiplatelet medication
2. Confirmed coagulation disorder (pathological or drug induced)
3. Confirmed systemic Inflammatory diseases
4. known pregnancy
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Study design
Purpose of the study
Diagnosis
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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
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Crossover
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Other design features
Pilot quality control study
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
24/02/2009
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Actual
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Date of last participant enrolment
Anticipated
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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)
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Funding & Sponsors
Funding source category [1]
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Self funded/Unfunded
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Name [1]
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Department of Anaesthesia
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Address [1]
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Royal Perth Hospital
Wellington Street Campus
Perth 6000
WA
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Country [1]
4554
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Australia
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Primary sponsor type
Hospital
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Name
Royal Perth Hospital
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Address
Royal Perth Hospital
Wellington Street Campus
Perth 6000
WA
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Country
Australia
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
4110
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Country [1]
4110
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
6604
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Royal Perth Ethics Committee
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Ethics committee address [1]
6604
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Royal Perth Hospital
Wellington Street Campus
Perth 6000
WA
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Ethics committee country [1]
6604
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Australia
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Date submitted for ethics approval [1]
6604
0
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Approval date [1]
6604
0
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Ethics approval number [1]
6604
0
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Summary
Brief summary
Thromboelastography (TEG) is an in vitro method of measuring whole blood coagulation. It is, however, unknown whether the use of a venous tourniquet during blood sampling effects the results, making interpretation of a patients coagulation unreliable. This trial aims to answer this question.
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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
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Address
29320
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Country
29320
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Phone
29320
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Fax
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Email
29320
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Contact person for public queries
Name
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Dr Thomas Collyer
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Address
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Department of Anaesthesia
Royal Perth Hospital
Wellington Street Campus
Perth 6000
WA
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Country
12567
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Australia
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Phone
12567
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+61 (0)424661181
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Fax
12567
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Email
12567
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[email protected]
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Contact person for scientific queries
Name
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Dr Thomas Collyer
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Address
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Department of Anaesthesia
Royal Perth Hospital
Wellington Street Campus
Perth 6000
WA
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Country
3495
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Australia
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Phone
3495
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+61 (0)424661181
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Fax
3495
0
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Email
3495
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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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