Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
COMPLETED
NA
60 participants
INTERVENTIONAL
2005-03-31
2007-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
As stored blood gets older its ability to carry oxygen may be reduced. Whether or not this is important in patients with a brain injury is not currently known.
The purpose of this study is to try and determine if fresh blood (less than 5 days old) is better than old blood (greater than 20 days old) in improving the supply of oxygen in patients who have suffered an injury to their brain.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
To demonstrate that packed red blood cells (pRBC) less than 5 days old are superior to older (\>20days) blood in improving markers of cerebral oxygenation in acutely head injured patients.
HYPOTHESIS
Transfusion of pRBC will result in increased cerebral extraction of oxygen. This effect will be greatest in pRBC stored for a greater length of time.
JUSTIFICATION
One of the main aims of the intensive management of head injured patients is the prevention of secondary hypoxic or hypotensive insults in the already injured brain. Packed red blood cell transfusions are commonly given to trauma patients suffering anemia (Hgb \<100 g/l) secondary to blood loss in order to improve oxygen delivery to vital organs including the brain.
Previous studies have shown that the capacity of packed red blood cells (pRBC) to improve oxygen delivery to tissues diminishes with increased time in storage. This storage lesion may improve with time post transfusion; however, this may take many hours.
Other studies have shown an association between age of pRBCs transfused and length of stay in trauma patients and mortality in septic ICU patients. Unused old blood is likely to be sent to high volume centers to avoid wasting a precious resource.
The effects of 'old' transfused blood have not been subject to rigorous prospective studies and age of blood has not been shown to be causally related to the adverse outcomes mentioned above, hence the need for further studies.
The injured brain is uniquely sensitive to further damage. Even a brief secondary insult of either hypotension or hypoxia has been shown to have a significant adverse effect on outcomes including permanent disability and death. Furthermore the measurement of markers of cerebral oxygenation forms part of the standard care of severely head injured patients in this institution giving a unique opportunity to study the effects of blood transfusion in this group of patients.
The presence of a storage lesion in pRBCs lasting even a few hours could have a significant impact on the head injured patient. If indeed 'fresh' blood does significantly improve markers of cerebral oxygenation when compared to older blood it could alter clinical practice significantly by placing a priority on transfusing only 'fresh' blood in such patients. The effect of age of pRBCs has never been studied in the head injured population.
Donated blood is stored for a maximum of 42 days. The average age of pRBC administered at VGH is 21 days.
OBJECTIVES
To evaluate the effect of transfusing "fresh" (blood stored less than 5 days) versus "stored" (blood stored for greater than 20 days) pRBC on cerebral oxygen extraction. We will also evaluate the effect of transfusion of pRBC on cerebral oxygen extraction in patients with traumatic brain injury.
RESEARCH METHOD
This is a single centre randomized trial in severely head injured patients requiring a blood transfusion. Randomization will be by computer generated random numbers paced in sealed envelopes. Patients would be randomized to receive either blood less than 5 days old or greater than 20 days old. The decision to transfuse and all other intensive care management will be unaltered by enrolment in the study.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Keywords
Explore important study keywords that can help with search, categorization, and topic discovery.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Blood Transfusion
This is a single centre randomized trial in severely head injured patients requiring a blood transfusion. Randomization will be by computer generated random numbers paced in sealed envelopes. Patients would be randomized to receive either blood less than 5 days old or greater than 20 days old. The decision to transfuse and all other intensive care management will be unaltered by enrolment in the study.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
2. Glasgow Coma Scale \< 8
3. Invasive neurological monitoring:
1. External Ventricular Drain
2. Jugular bulb catheter
4. Hemoglobin \< 100 g/L and decision has been made by Attending Physician to treat with one unit pRBC
Exclusion Criteria
2. Ongoing need for blood products
3. Received Packed Red Blood Cells within preceding 24 hours
4. Multiple trauma necessitating ongoing resuscitation
5. Pregnant patients
6. Chronic renal failure
7. Severe sepsis or septic shock
8. Adult respiratory distress syndrome or acute lung injury
9. Presumed unstable neurological status during course of study
10. Lack of informed consent
16 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
University of British Columbia
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
University of British Columbia
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Dean Chittock, MD
Role: PRINCIPAL_INVESTIGATOR
University of British Columbia
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
Vancouver General Hospital
Vancouver, British Columbia, Canada
Countries
Review the countries where the study has at least one active or historical site.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
VCHRI #V04-0261
Identifier Type: -
Identifier Source: secondary_id
C04-0459
Identifier Type: -
Identifier Source: org_study_id