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    Clinical Trial Results:
    Fibrinogen concentrate supplementation in the management of bleeding during paediatric cardiopulmonary bypass: a phase 1B/2A, open label dose escalation study (Version 1.0, Jan 28, 2014)

    Summary
    EudraCT number
    2013-003532-68
    Trial protocol
    GB  
    Global end of trial date
    29 Jul 2016

    Results information
    Results version number
    v1(current)
    This version publication date
    20 Dec 2018
    First version publication date
    20 Dec 2018
    Other versions
    Summary report(s)
    FINAL STUDY REPORT

    Trial information

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    Trial identification
    Sponsor protocol code
    FIBCON
    Additional study identifiers
    ISRCTN number
    ISRCTN50553029
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Guy's and St Thomas' NHS Foundation Trust
    Sponsor organisation address
    Great Maze Pond, London, United Kingdom, SE19RT
    Public contact
    Dr Shane Tibby, Guy's and St Thomas' NHS Foundation Trust, 44 0207188 4572 , shane.tibby@gstt.nhs.uk
    Scientific contact
    Dr Shane Tibby, Guy's and St Thomas' NHS Foundation Trust, 44 0207188 4572 , shane.tibby@gstt.nhs.uk
    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
    29 Jul 2016
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    29 Jul 2016
    Global end of trial reached?
    Yes
    Global end of trial date
    29 Jul 2016
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To determine the dose of intraoperative human fibrinogen concentrate required to achieve physiological levels of fibrin polymerization of 8 to 13 mm as measured by the ROTEM measure of fibrin-based clotting: FibTEM MCF (equating to plasma fibrinogen concentrations of 1.5 to 2.5 g/L), immediately prior to separation from cardiopulmonary bypass in neonates and children < 12kg
    Protection of trial subjects
    For patients in the active arm, the drug will be administered in a non-blinded fashion, according to manufacturer’s instructions, via a dedicated lumen of the central venous line, while the patient is still on cardiopulmonary bypass, at time T2 (approximately 1 hour prior to separation from CPB). Administration of study drug while still on CPB represents a major departure from adult trials; however this design was chosen to maximise safety, due to the potential for (a)drug hypersensitivity/allergic reactions and (b) acute vascular occlusion in this patient group (a life threatening complication)
    Background therapy
    Not applicable
    Evidence for comparator
    -
    Actual start date of recruitment
    19 Sep 2014
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    United Kingdom: 111
    Worldwide total number of subjects
    111
    EEA total number of subjects
    111
    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)
    111
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    0
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Participants were recruited from one clinical site in London during 2014 to 2016.

    Pre-assignment
    Screening details
    Inclusion Criteria i) Congenital heart disease requiring non-emergency* surgery on cardiopulmonary bypass ii) Age range: > 36 weeks corrected gestation iii) Weight 2.5 – 12 kg iv) Informed consent to participate *Non-emergency is defined as surgery that can be delayed .24 hours following diagnosis of congenital heart disease

    Period 1
    Period 1 title
    Overall Trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Single blind [1]
    Roles blinded
    Subject, Carer, Assessor
    Blinding implementation details
    Randomised, placebo controlled, , dose escalation study. Trial team not blinded. Treating clinicians and patients will blinded to allocation to reduce bias with respect to the secondary objectives of (a) safety (adverse event reporting) and (b) efficacy (ancillary blood products administered).

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    MONITOR GROUP
    Arm description
    In instances of screening failure (FibTEM MCF >7mm), patients will not be randomised, and will undergo data collection only (as per study protocol) - MONITOR arm 1 hour prior to end of CPB - ROTEM: FibTEM‐MCF, If > 7 mm < 6 mm - recruited to MONITOR arm
    Arm type
    No intervention

    Investigational medicinal product name
    No investigational medicinal product assigned in this arm
    Arm title
    ACTIVE GROUP
    Arm description
    For patients in the active arm, the drug will be administered in a non-blinded fashion, according to manufacturer’s instructions, via a dedicated lumen of the central venous line, while the patient is still on cardiopulmonary bypass, at time T2 (approximately 1 hour prior to separation from CPB). The administering clinician will monitor closely for signs of flushing, rash, hypotension or requirement for increased CPB circuit fluid supplementation. Upon recommencement of mechanical ventilation, the clinician will monitor for signs of wheeze, unexplained hypoxia or hypercarbia, and decreased chest compliance as shown by need for increased ventilatory pressures.
    Arm type
    Experimental

    Investigational medicinal product name
    RIASTAP
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Powder for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    The ROTEM-based dosing formula produced a consistent overshoot in FibTEM MCF (median achieved level 13mm, predicted level 9mm). However the precision was reasonable (interquartile range 10 to 14mm). A similar pattern was seen for achieved fibrinogen levels. Fibrinogen levels post-dosing were within the targeted range of 1.5 to 2.5 g/L in 43/60 (72%) patients receiving IMP. Of not, all patients achieved a fibrinogen level >1.0 g/L (minimum 1.2 g/L), and none would be deemed supratherapeutic (maximum 3.3 g/L). This was achieved using an adminsitered TOTAL fibrinogen concentrate dose of 51 to 218 mg/kg. However, this dose includes a factor to incorporate the extracorporeal circuit; the equivalent dose range for patients not receiving cardiopulmonary bypass would be 31 to 87 mg/kg.

    Arm title
    PLACEBO GROUP
    Arm description
    -
    Arm type
    Placebo

    Investigational medicinal product name
    sodium chloride 0.9% solution
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection/infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Patients will be administered placebo only if they meet screening criteria at T2 (one hour prior to separation from CPB), as evidenced by: FibTEM MCF <6mm.

    Notes
    [1] - The number of roles blinded appears inconsistent with a single blinded trial. It is expected that there will be one role blinded in a single blind trial.
    Justification: Treating clinicians and patients were blinded to allocation, Trial team were not blinded.
    Number of subjects in period 1
    MONITOR GROUP ACTIVE GROUP PLACEBO GROUP
    Started
    21
    60
    30
    Completed
    21
    60
    30

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    MONITOR GROUP
    Reporting group description
    In instances of screening failure (FibTEM MCF >7mm), patients will not be randomised, and will undergo data collection only (as per study protocol) - MONITOR arm 1 hour prior to end of CPB - ROTEM: FibTEM‐MCF, If > 7 mm < 6 mm - recruited to MONITOR arm

    Reporting group title
    ACTIVE GROUP
    Reporting group description
    For patients in the active arm, the drug will be administered in a non-blinded fashion, according to manufacturer’s instructions, via a dedicated lumen of the central venous line, while the patient is still on cardiopulmonary bypass, at time T2 (approximately 1 hour prior to separation from CPB). The administering clinician will monitor closely for signs of flushing, rash, hypotension or requirement for increased CPB circuit fluid supplementation. Upon recommencement of mechanical ventilation, the clinician will monitor for signs of wheeze, unexplained hypoxia or hypercarbia, and decreased chest compliance as shown by need for increased ventilatory pressures.

    Reporting group title
    PLACEBO GROUP
    Reporting group description
    -

    Reporting group values
    MONITOR GROUP ACTIVE GROUP PLACEBO GROUP Total
    Number of subjects
    21 60 30 111
    Age categorical
    Units: Subjects
        Preterm newborn infants (gestational age < 37 wks)
    21 60 30 111
    Gender categorical
    Units: Subjects
        Female
    13 30 13 56
        Male
    8 30 17 55

    End points

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    End points reporting groups
    Reporting group title
    MONITOR GROUP
    Reporting group description
    In instances of screening failure (FibTEM MCF >7mm), patients will not be randomised, and will undergo data collection only (as per study protocol) - MONITOR arm 1 hour prior to end of CPB - ROTEM: FibTEM‐MCF, If > 7 mm < 6 mm - recruited to MONITOR arm

    Reporting group title
    ACTIVE GROUP
    Reporting group description
    For patients in the active arm, the drug will be administered in a non-blinded fashion, according to manufacturer’s instructions, via a dedicated lumen of the central venous line, while the patient is still on cardiopulmonary bypass, at time T2 (approximately 1 hour prior to separation from CPB). The administering clinician will monitor closely for signs of flushing, rash, hypotension or requirement for increased CPB circuit fluid supplementation. Upon recommencement of mechanical ventilation, the clinician will monitor for signs of wheeze, unexplained hypoxia or hypercarbia, and decreased chest compliance as shown by need for increased ventilatory pressures.

    Reporting group title
    PLACEBO GROUP
    Reporting group description
    -

    Primary: Primary Objective

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    End point title
    Primary Objective [1] [2]
    End point description
    To determine the dose of intraoperative fibrinogen concentrate required to achieve physiological levels of fibrin polymerization of 8 to 13 mm as measured by the rotational thromboelastometry (ROTEM) measure of fibrin‐based clotting: FibTEM MCF (equating to plasma fibrinogen concentrations of 1.5 to 2.5 g/L), immediately prior to separation from cardiopulmonary bypass in neonates and infants < 12kg.
    End point type
    Primary
    End point timeframe
    During cardiac surgery immediately prior to cardiopulmonary bypass separation.
    Notes
    [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: Please see attached document for all values and results.
    [2] - The end point is not reporting statistics for all the arms in the baseline period. It is expected all the baseline period arms will be reported on when providing values for an end point on the baseline period.
    Justification: The MONITOR group was not, nor intended to be analysed for Primary Objective or Endpoint.
    End point values
    ACTIVE GROUP PLACEBO GROUP
    Number of subjects analysed
    60
    30
    Units: decimal
    60
    30
    Attachments
    PRIMARY ENDPOINT
    No statistical analyses for this end point

    Secondary: Secondary Objective

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    End point title
    Secondary Objective
    End point description
    Secondary Objectives: (a) To provide preliminary efficacy and safety data (b) To document ROTEM profiles intra‐ and post‐operatively Although classed as open label; the administration of IMP/placebo was known only to the study team administering the study drug. Clinical staff, patients and those collecting and adjudicating the safety and efficacy data were blinded.
    End point type
    Secondary
    End point timeframe
    During cardiac surgery immediately prior to cardiopulmonary bypass separation.
    End point values
    MONITOR GROUP ACTIVE GROUP PLACEBO GROUP
    Number of subjects analysed
    21
    60
    30
    Units: decimal
    21
    60
    30
    Attachments
    SECONDARY ENDPOINT
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    0 to 30 days
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    17.1
    Reporting groups
    Reporting group title
    ACTIVE GROUP
    Reporting group description
    -

    Reporting group title
    PLACEBO GROUP
    Reporting group description
    -

    Reporting group title
    MONITOR GROUP
    Reporting group description
    -

    Serious adverse events
    ACTIVE GROUP PLACEBO GROUP MONITOR GROUP
    Total subjects affected by serious adverse events
         subjects affected / exposed
    0 / 60 (0.00%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         number of deaths (all causes)
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    0
    Frequency threshold for reporting non-serious adverse events: 0%
    Non-serious adverse events
    ACTIVE GROUP PLACEBO GROUP MONITOR GROUP
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    13 / 60 (21.67%)
    9 / 30 (30.00%)
    1 / 21 (4.76%)
    Congenital, familial and genetic disorders
    SVT on dissection during chest opening
         subjects affected / exposed
    3 / 60 (5.00%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    3
    0
    0
    Vascular disorders
    cerebral occipital haematoma / empyema
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    Cardiac disorders
    sinus tachycardia
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    tachycardiac and hypotension
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    ST elevation
         subjects affected / exposed
    1 / 60 (1.67%)
    1 / 30 (3.33%)
    1 / 21 (4.76%)
         occurrences all number
    1
    1
    1
    ST depression, tachycardia, hypotension
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    unusually severe' hypotension with lactic acidosis post bypass
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    Pericardial effusion
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    2
    0
    0
    Low Cardiac Output Syndrome
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    flushing
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    brief run of self- limiting VT (<60 sec)
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    cardiorespiratory arrest
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    ST depression pre bypass
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    ST depression postop ECG, on preop ECG was already present
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    hypoxia, hypotens & ischaemic ECG changes during prolonged period of dissection
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    ST changes after removal of cross clamp, visible air in coronaries
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    bowel perforation on insertion of PD cath
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    Surgical and medical procedures
    tear or abrasion to stomach on PD cath insertion
         subjects affected / exposed
    0 / 60 (0.00%)
    3 / 30 (10.00%)
    0 / 21 (0.00%)
         occurrences all number
    0
    3
    0
    inominate vein punctured during CVC insertion
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    mediastinal wash out as bleeding concerns, antiXa supratherapeutic
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    Blood and lymphatic system disorders
    insufficient heparinisation, low AT3, AT3 conc. given
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    Respiratory, thoracic and mediastinal disorders
    pulm. haemorrh & difficult ventil on PICU adm.
         subjects affected / exposed
    0 / 60 (0.00%)
    1 / 30 (3.33%)
    0 / 21 (0.00%)
         occurrences all number
    0
    1
    0
    pulmonary haemorrhage
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    tension pneumothorax
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    Pleural Effusion
         subjects affected / exposed
    1 / 60 (1.67%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    1
    0
    0
    hypoxia after coming off bypass
         subjects affected / exposed
    2 / 60 (3.33%)
    0 / 30 (0.00%)
    0 / 21 (0.00%)
         occurrences all number
    2
    0
    0

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? No

    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
    For support, Contact us.
    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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