Interruptions in the Coagulationsystem in Relation With Cardiac Surgery - A Study Comparing Two Heparinization Strategies During On-pump Cardiac Surgery

June 25, 2015 updated by: Jan Jesper Andreasen, Professor, MD, PhD, Aalborg University Hospital

Interruptions in the Coagulationsystem in Relation With Cardiac Surgery -A Randomized Study Comparing Two Heparinization Strategies During On-pump Cardiac Surgery

The purpose of this study is to find the heparinization method, which

  1. affect the heparin-protaminsulfate ratio in the best way to achieve haemostasis
  2. gives the smallest change in endogenous thrombin potential (ETP)postoperative compared to preoperative (deltaETP) as an indicator for haemostatic activation during cardiac surgery.

The hypothesis is that the deltaETP is larger in the Haemochron Signature Elite group than in the Hepcon-group because of the heparinization-method. Therefore there is a potential higher risk for use of bloodproducts postoperatively.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Aalborg, Denmark, 9000
        • Aalborg Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Elective on-pump coronary artery bypass grafting (CABG) single procedure
  • Elective aortavalve replacement (AVR) (single procedure)

Exclusion Criteria:

  • Emergency procedures
  • Children and youngsters less than 18 years
  • Pregnancy
  • Less than 2 days break with platelet inhibiting drugs (acetylsalicylic acid, NSAID, clopidogrel, serotonin reuptake inhibitors)
  • Less than 2 days break with AC-treatment (warfarin, heparin, coumarin etc)
  • Known coagulopathy
  • Endocarditis
  • Preoperative anaemia
  • Dialysis patients

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: SUPPORTIVE_CARE
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: NONE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Activated clotting time (ACT) group
heparinization measured as activated clotting time during surgery
Device: Activated clotting time versus blood-heparin concentration
Activated clotting time used for heparinization strategy during cardiag surgery versus blood-heparin concentration
Other Names:
  • ACT
  • HMS
  • Hemochron Signature Elite
  • Hepcon
Experimental: Hepcon group
heparinization measured as heparin concentration in the blood during surgery
Device: Activated clotting time versus blood-heparin concentration
Activated clotting time used for heparinization strategy during cardiag surgery versus blood-heparin concentration
Other Names:
  • ACT
  • HMS
  • Hemochron Signature Elite
  • Hepcon

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Delta Thrombingeneration
Time Frame: Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
Postoperative versus preoperative thrombingeneration evaluated by Endogenous Thrombin Potential,peak Thrombin level and Lagtime by using a Thromboscope
Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
peroperative heparine/protaminesulphate ratio
Time Frame: The timeframe is from the first heparin is given to the neutralization with protamine sulfate, average time 4 hours
The timeframe is from the first heparin is given to the neutralization with protamine sulfate, average time 4 hours
Platelet function
Time Frame: Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
Platelet aggregation measured by Multiplate platelet function analyzer
Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
Thromboelastometry
Time Frame: Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
We are looking at the parameters: Clottingtime, Clot formation time and maximum velocity,maximum clot firmness
Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
Standard coagulationtests
Time Frame: Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.
Timeframe is from Start of surgery to 4 hours after end of surgery, average time 9 hours.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Aalborg University Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Medtronic

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Susanne de Neergaard, Perfusionist, Heart-Lung surgery unit, Aalborg Hospital, Aarhus University Hospital, Hobrovej 18-22, DK-9000 Aalborg

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 1, 2011

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 1, 2012

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2012

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 17, 2011

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 31, 2011

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 1, 2011

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 26, 2015

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 25, 2015

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • N-20110037

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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