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    Clinical Trial Results:
    A pilot trial to assess the efficacy of Argatroban (Argatra®) in critically ill patients with heparin resistance

    Summary
    EudraCT number
    2012-000487-23
    Trial protocol
    AT  
    Global end of trial date
    06 Apr 2016

    Results information
    Results version number
    v1(current)
    This version publication date
    14 Nov 2021
    First version publication date
    14 Nov 2021
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    ArgHeR
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT01734252
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Medical University of Innsbruck
    Sponsor organisation address
    Anichstraße 35, Innsbruck, Austria, 6020
    Public contact
    Projektmanagement, Medizinische Universität Innsbruck / Univ.-Klinik für Allgemeine und Chirurgische Intensivmedizin, 0043 051250480451, mirjam.bachler@i-med.ac.at
    Scientific contact
    Projektmanagement, Medizinische Universität Innsbruck / Univ.-Klinik für Allgemeine und Chirurgische Intensivmedizin, 0043 051250480451, mirjam.bachler@i-med.ac.at
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    28 Jun 2019
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    06 Apr 2016
    Global end of trial reached?
    Yes
    Global end of trial date
    06 Apr 2016
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The objective is to achieve a prophylactic anticoagulation level within 7(+/-1) hours after Baseline. The parameter to define the anticoagulation level is aPTT and will be measured at 7(+/-1) hours for the Primary Objective.
    Protection of trial subjects
    After the study drug was discontinued, a radiologist performed a duplex ultrasound scan of the lower extremity veins to detect clinically apparent non-apparent venous thromboembolism.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    29 Jul 2012
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    No
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Austria: 42
    Worldwide total number of subjects
    42
    EEA total number of subjects
    42
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    28
    From 65 to 84 years
    14
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    All patients with a heparin (UFH) dose of 1,200 IU/H not reaching the target aPTT of 45 seconds were included by the study investigators

    Pre-assignment
    Screening details
    All patients at the participating ICU with a heparin (UFH) dose of 1,200 IU/H were screened by the study investigators

    Period 1
    Period 1 title
    Overall Trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Standard Therapie
    Arm description
    The standard therapy group continued to receive heparin at 1,200 IU per hour, which was increased to a maximum heparin dose of 1,500 IU per hour.
    Arm type
    Active comparator

    Investigational medicinal product name
    Unfractionated Heparin (UFH)
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    A maximum dose of 1,500 IU / hour was given as continuous intravenous infusion to reach a aPTT target range of 45 to 60 seconds

    Arm title
    Argatroban
    Arm description
    The initial dosage of argatroban was determined by the treating physician and adjusted according to aPTT.
    Arm type
    Experimental

    Investigational medicinal product name
    Argatroban
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    The initial dosage of argatroban was determined by the treating physician and adjusted according to aPTT to reach a target aPTT range of 45 to 60 seconds. Hereby the maximum dose was 10 µg/kg/min .

    Number of subjects in period 1
    Standard Therapie Argatroban
    Started
    20
    22
    Completed
    20
    22

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Standard Therapie
    Reporting group description
    The standard therapy group continued to receive heparin at 1,200 IU per hour, which was increased to a maximum heparin dose of 1,500 IU per hour.

    Reporting group title
    Argatroban
    Reporting group description
    The initial dosage of argatroban was determined by the treating physician and adjusted according to aPTT.

    Reporting group values
    Standard Therapie Argatroban Total
    Number of subjects
    20 22 42
    Age categorical
    Units: Subjects
        Adults (18-64 years)
    11 16 27
        From 65-84 years
    9 6 15
    Age continuous
    Units: years
        median (inter-quartile range (Q1-Q3))
    57.5 (46 to 68) 56.5 (44.2 to 64.8) -
    Gender categorical
    Units: Subjects
        Female
    2 1 3
        Male
    18 21 39

    End points

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    End points reporting groups
    Reporting group title
    Standard Therapie
    Reporting group description
    The standard therapy group continued to receive heparin at 1,200 IU per hour, which was increased to a maximum heparin dose of 1,500 IU per hour.

    Reporting group title
    Argatroban
    Reporting group description
    The initial dosage of argatroban was determined by the treating physician and adjusted according to aPTT.

    Primary: Achievement of aPTT > 45 seconds within 8 h

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    End point title
    Achievement of aPTT > 45 seconds within 8 h
    End point description
    End point type
    Primary
    End point timeframe
    Within 7 h (+/-1 h) after administration start of the study medication
    End point values
    Standard Therapie Argatroban
    Number of subjects analysed
    20 [1]
    22
    Units: Number
    20
    22
    Notes
    [1] - 2 discontinued study treatment due to violating inclusion criteria
    Statistical analysis title
    Statistical assessment of primary endpoint
    Comparison groups
    Standard Therapie v Argatroban
    Number of subjects included in analysis
    42
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    < 0.05
    Method
    Fisher exact
    Confidence interval

    Secondary: Achievement of aPTT > 45 seconds within 24 h

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    End point title
    Achievement of aPTT > 45 seconds within 24 h
    End point description
    End point type
    Secondary
    End point timeframe
    Within 24 h after administration start of the study medication
    End point values
    Standard Therapie Argatroban
    Number of subjects analysed
    20 [2]
    22
    Units: Number
        Number of Patients
    20
    22
    Notes
    [2] - 2 drop outs
    Statistical analysis title
    Statistical assessment of secondary endpoint
    Comparison groups
    Standard Therapie v Argatroban
    Number of subjects included in analysis
    42
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    < 0.05
    Method
    Fisher exact
    Confidence interval

    Adverse events

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    Adverse events information [1]
    Timeframe for reporting adverse events
    Adverse Events were collected/recorded from study inclusion until safety visit on day 7 was conducted.
    Adverse event reporting additional description
    All subjects in this study experienced at least 1 AE. So the total number of subjects affected bei non-serious AE is 20 in the heparin group and 22 in the argatroban group.
    Assessment type
    Non-systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    19.0
    Reporting groups
    Reporting group title
    Standard Therapie
    Reporting group description
    The standard therapy group continued to receive heparin at 1,200 IU per hour, which was increased to a maximum heparin dose of 1,500 IU per hour.

    Reporting group title
    Argatroban
    Reporting group description
    The initial dosage of argatroban was determined by the treating physician and adjusted according to aPTT.

    Notes
    [1] - There are no non-serious adverse events recorded for these results. It is expected that there will be at least one non-serious adverse event reported.
    Justification: All subjects in this study experienced at least 1 non-serious AE.
    Serious adverse events
    Standard Therapie Argatroban
    Total subjects affected by serious adverse events
         subjects affected / exposed
    9 / 20 (45.00%)
    8 / 22 (36.36%)
         number of deaths (all causes)
    1
    0
         number of deaths resulting from adverse events
    0
    0
    Vascular disorders
    Deep vein thrombosis leg
    Additional description: Classified as SAR: heparin group (switch): 1; argatroban group 1;
         subjects affected / exposed
    1 / 20 (5.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    1 / 1
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac disorders
    Ventricular fibrillation
    Additional description: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    General disorders and administration site conditions
    Death
    Additional description: Heparin group (switch): 1
         subjects affected / exposed
    1 / 20 (5.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 1
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Respiratory arrest
    Additional description: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Respiratory failure
    Additional description: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Pleural hemorrhage
    Additional description: Classified as SAR: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Bronchial haemorrhage
    Additional description: Classified as SAR: Heparin group: 2
         subjects affected / exposed
    2 / 20 (10.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    2 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Renal and urinary disorders
    Renal failure acute
    Additional description: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Infections and infestations
    Aspergillus fumigatus bronchopulmonary infection
    Additional description: Heparin group: 1
         subjects affected / exposed
    1 / 20 (5.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Sepsis
    Additional description: Heparin group (switch): 1
         subjects affected / exposed
    1 / 20 (5.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Shock septic
    Additional description: Heparin group (switch): 1; argatroban group: 1
         subjects affected / exposed
    1 / 20 (5.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Staphylococcal sepsis
    Additional description: Argatroban group: 1
         subjects affected / exposed
    0 / 20 (0.00%)
    1 / 22 (4.55%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Acute peritonitis
    Additional description: Heparin group (switch): 1
         subjects affected / exposed
    1 / 20 (5.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    H1N1 influenza
    Additional description: Heparin group: 1
         subjects affected / exposed
    1 / 20 (5.00%)
    0 / 22 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Standard Therapie Argatroban
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    0 / 20 (0.00%)
    0 / 22 (0.00%)

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    22 Nov 2013
    Change of recommendation for argatroban start dosing; addition of a secondary endpoint (add: correlation of laboratory parameters and Argatroban dose/level); deletion of exclusion criteria (FXII deficiency and L. anticoagulants -> these factors were evaluated at baseline since then). Addition of two sites.
    16 Oct 2015
    Prolongation of recruitment period. Deletion of two sites due to no patient recruitment. Deletion of the DSMB.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported

    Online references

    http://www.ncbi.nlm.nih.gov/pubmed/32244368
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