Prehospital Transfusion Strategy in Bleeding Patients

November 14, 2025 updated by: University of Aarhus

Prehospital Plasma or Red Blood Cell Transfusion Strategy in Major Bleeding; PRIEST Trial

The aim of study is to compare clinical and biochemical effect of three different transfusion strategies among patients with major hemorrhage requiring prehospital transfusion.

A) Present prehospital standard treatment including a mixture of plasma and Red blood cell transfusion (RBC) transfusion B) Red blood cell transfusion (RBC) only C) Plasma transfusion only

Hypothesis:

  1. Transfusion strategy including a mixture of RBC and plasma is superior as compared with only plasma or only RBC strategy in terms of initial treatment of circulatory shock (expressed as base deficit).
  2. Endothelial function and ability of clot formation is preserved to a greater extent in patients receiving plasma.

Study Overview

Status

Status

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

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.

Detailed Description

Rationale for the study:

The warranted clinical question to be unsolved is whether initial pre-hospital transfusion in bleeding patients should base on a strategy including plasma, RBC or combination of both.

Despite possible benefits, allogenic blood product are associated with side effects and pose significant logistic challenges in the prehospital environment. So far, a majority of the present knowledge is based on retrospective evaluations or clinical trials without relevant control groups.

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

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
120

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 Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Denmark
      • Aarhus, Denmark
        • Danish Air Ambulance
    • Central Jutland
      • Silkeborg, Central Jutland, Denmark, 8600
        • Aarhus Universityhospital

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

Description

Inclusion Criteria:

  • Major bleeding requiring prehospital transfusion

Exclusion Criteria:

  • Transfusion with blood products already initiated

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

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.
No Intervention: Standard transfusion
Includes standard transfusion with a mixture of red blood cells and plasma
Active Comparator: Plasma
Transfusion with plasma
Biological: Blood products
Compare two different transfusion strategies against standard transfusion regimen
Active Comparator: Red Blood cells
Transfusion with red blood cells
Biological: Blood products
Compare two different transfusion strategies against standard transfusion regimen

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
Base deficit
Time Frame: At hospital arrival (with in 1 hour)
Arterial-gas analysis upon arrival with parameter base deficit as primary outcome
At hospital arrival (with in 1 hour)

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
30 days mortality
Time Frame: mortality within 30 days
Mortality, follow up in patient records
mortality within 30 days
Activated Partial Thromboplastin Time (APTT)
Time Frame: At hospital arrival (with in 2 hours)
Plasma sample analysed; APTT
At hospital arrival (with in 2 hours)
Endogenous thrombin potential (ETP)
Time Frame: At hospital arrival (with in 2 hours)
Plasma sample analysed; thrombin generation assay
At hospital arrival (with in 2 hours)
International Normalized Ratio (INR)
Time Frame: At hospital arrival (with in 2 hours)
Plasma sample analysed; INR
At hospital arrival (with in 2 hours)
Endothelium markers
Time Frame: At hospital arrival (with in 2 hours)
Plasma sample analysed; Syndecan-1
At hospital arrival (with in 2 hours)
Endothelium markers
Time Frame: At hospital arrival (with in 2 hours)
Plasma sample analysed; soluble thrombomodulin
At hospital arrival (with in 2 hours)
In hospital red blood cell transfusion requirements
Time Frame: Within in the first 24 hours after hospital arrival
Amount of red blood cells transfused as registered in patient electronic records
Within in the first 24 hours after hospital arrival
In hospital plasma transfusion requirements
Time Frame: Within in the first 24 hours after hospital arrival
Amount of plasma transfused as registered in patient electronic records
Within in the first 24 hours after hospital arrival
In hospital platelet transfusion requirements
Time Frame: Within in the first 24 hours after hospital arrival
Amount of platelet transfused as registered in patient electronic records
Within in the first 24 hours after hospital arrival

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.
University of Aarhus

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.
Odense University Hospital
Norwegian Air Ambulance Foundation
Copenhagen University Hospital, Denmark

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.
  • Study Chair: Christian Fenger-Eriksen, Aarhus Universityhospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

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.
May 3, 2021

Primary Completion (Actual)

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.
December 31, 2024

Study Completion (Actual)

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.
December 31, 2024

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).
April 29, 2021

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.
May 7, 2021

First Posted (Actual)

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.
May 10, 2021

Study Record Updates

Last Update Posted (Estimated)

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.
November 18, 2025

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.
November 14, 2025

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.
January 1, 2025

More Information

Terms related to this study

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.
  • 1-10-72-289-20

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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