Condition category
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Newborn babies and infants needing surgery for congenital heart disease suffer the most from bleeding within the chest. As a result, they are frequently exposed to many blood products, and may also suffer consequences of blood loss. We want to find out whether giving a new blood product, human fibrinogen concentrate, to these infants, will reduce bleeding and exposure to other blood products. A unique aspect of this study will be that study drug exposure and dose will be personalised to the patient on the basis of bleeding risk. Because bleeding risk cannot be estimated accurately before the operation, we will assess this during the operation using a test for coagulation, known as rotational thromboelastometry (ROTEM).

Who can participate?
Babies who are aged less than 36 weeks with congenital heart disease requiring surgery.

What does the study involve?
We will give the study drug to only those infants who are at higher risk of bleeding during the ROTEM screening during the operation. These infants will be randomly allocated to receive either fibrinogen or a placebo (dummy). Infants at lower risk will not be allocated to any group, but remain in the study, forming an observational group. All infants will receive standard care with respect to all other aspects.

What are the possible benefits and risks of participating?
As this is an early phase trial, it is impossible to delineate risks or benefits in any meaningful way.

Where is the study run from?
Evelina Children’s Hospital (UK)

When is the study starting and how long is it expected to run for?
The study starts in June 2014 and ends in March 2016

Who is funding the study?
CSL Behring (UK)

Who is the main contact?
Dr Shane Tibby

Trial website

Contact information



Primary contact

Dr Shane Tibby


Contact details

2nd floor
Evelina Children’s Hospital
Westminster Bridge Road
United Kingdom

Additional identifiers

EudraCT number

2013-003532-68 number

Protocol/serial number


Study information

Scientific title

Fibrinogen concentrate supplementation in the management of bleeding during paediatric cardiopulmonary bypass: a phase 1B/2A, open-label dose-escalation study


Study hypothesis

Fibrinogen concentrate supplementation during paediatric cardiopulmonary bypass may decrease the incidence and severity of postoperative bleeding, and reduce the need for transfusion of blood and ancillary blood products (platelets, fresh frozen plasma, and cryoprecipitate). The primary objective of this trial is 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 children < 12 kg.

Ethics approval

London - London Bridge Research Ethics Committee, 26/02/2014, ref: 14/LO/0267

Study design

Randomised; Interventional and Observational; Design type: Process of Care, Treatment, Cohort study

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet


Topic: Children; Subtopic: All Diagnoses; Disease: All Diseases


Fibrinogen concentrate: IMP will be administered while on cardiopulmonary bypass. Patients will be screened while on cardiopulmonary bypass (approx 1 hour before end of operation) using Rotational Thromboelastometry: FibTEM MCF. If MCF<7mm, patients will be randomised to IMP:placebo 2:1. Dose will be tailored to patient based upon measured FibTEM MCF and desired target range.; Study Entry : Registration and One or More Randomisations

Intervention type



Phase II

Drug names

Fibrinogen concentrate

Primary outcome measure

1. Fibrinogen concentration (measured using the Clauss method)
2. Fibrin polymerization (measured by rotational thromboelastometry Fib-TEM MCF) achieved within 5 minutes of completion of study drug

Secondary outcome measures

1. Efficacy
1.1. Mediastinal drain losses in first 24 hours after PICU admission
1.2. Requirement for delayed sternal closure due to clinical bleeding/tamponade
1.3. Requirement for ancillary blood transfusions in first 24 hours post PICU admission
1.4. Use of intra- and post-operative ancillary clotting products
1.5. Fibrinogen levels and ROTEM variables at time points T4 – T6

2. Safety
1.1. Incidence of major thrombotic event/thromboembolic associated complications
1.2. Allergic/hypersensitivity reaction to study drug

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Congenital heart disease requiring non-emergency* surgery on cardiopulmonary bypass
2. Age range: >36 weeks corrected gestation
3. Weight 2.5 to 12 kg
4. Informed consent to participate
*Non-emergency is defined as surgery that can be delayed >24 hours following diagnosis of congenital heart disease

Participant type


Age group




Target number of participants

Planned Sample Size: 90; UK Sample Size: 90

Total final enrolment


Participant exclusion criteria

1. Known pre-existing inherited coagulopathy
2. Known pre-existing inherited thrombophilia
3. Recent, acute (within previous 2 weeks) thrombosis in a major vessel or thrombotic related major complications (as defined in protocol sections 2.43 and 7.3)
4. Administration of antiplatelet agents (e.g. aspirin) <48 hours prior to surgery
5. Known hypersensitivity/allergy to the study drug or similar products
6. History of anaphylaxis
7. Enrolment in another clinical trial in the previous 3 months
8. Parent/guardian unable to provide informed consent (this can include insufficient understanding of the trial, as judged by the clinician taking consent)
9. Major comorbidity likely to increase risk of mortality from surgical procedure
10. Significant renal/liver impairment within 2 days of planned surgery (creatinine > 2x Upper Limit of Normal, Alanine Aminotransferase > 2x ULN)

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Evelina Children’s Hospital
United Kingdom

Sponsor information


Guy's and St Thomas' NHS Foundation Trust (UK)

Sponsor details

King’s Health Partners Clinical Trials Office
16th Floor
Tower Wing
Guy's Hospital
Great Maze Pond
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type


Funder name

CSL Behring

Alternative name(s)

Funding Body Type

private sector organisation

Funding Body Subtype

For-profit companies (industry)


United States of America

Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

See: (added 21/06/2019)

Publication list

2020 results in (added 23/11/2020)

Publication citations

Additional files

Editorial Notes

23/11/2020: Publication reference added. 21/06/2019: Added link to basic results (scientific). Added total final enrollment. 15/05/2018: No publications found, verifying study status with principal investigator.