Age of Blood in Brain Injury
Donated red blood cells vary in how old they are, that is, how long they have been stored since being collected from donors. Blood that has been donated is stored for a maximum of 42 days, after this time it is expired. That means that red blood cells that are given to patients as a blood transfusion can be anywhere from a few days old to 42 days old. The average age of blood that is given as a blood transfusion in this hospital is 21 days old.
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.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
|Official Title:||A Prospective Randomized Controlled Trial Comparing the Effects of Fresh vs. Old Blood on Cerebral Oxygen Extraction in Patients With Traumatic Brain Injuries|
- To evaluate the effect of transfusing "fresh" (blood stored less than 5 days) versus "stored" (blood stored for greater than 20 days) packed red blood cells (pRBC) on cerebral oxygen extraction ratio for 24 hours post transfusion [ Time Frame: 20 days ] [ Designated as safety issue: No ]
- To evaluate the effect of transfusion of pRBC on cerebral oxygen extraction in patients with traumatic brain injury for 24 hours post transfusion. [ Time Frame: 24 hours ] [ Designated as safety issue: No ]
|Study Start Date:||March 2005|
|Study Completion Date:||December 2007|
|Primary Completion Date:||December 2007 (Final data collection date for primary outcome measure)|
Procedure: Blood Transfusion
|Canada, British Columbia|
|Vancouver General Hospital|
|Vancouver, British Columbia, Canada, V5Z 1M9|
|Principal Investigator:||Dean Chittock, MD||University of British Columbia|