Effect of age of transfused red blood cells on neurologic outcome following traumatic brain injury (ABLE-tbi Study): a nested study of the Age of Blood Evaluation (ABLE) trial.
Effet de l’âge des culots sanguins transfusés sur le devenir neurologique après un traumatisme cérébral (étude ABLE-tbi) : une étude imbriquée dans l’essai clinique ABLE (Age of Blood Evaluation).
Journal
Canadian journal of anaesthesia = Journal canadien d'anesthesie
ISSN: 1496-8975
Titre abrégé: Can J Anaesth
Pays: United States
ID NLM: 8701709
Informations de publication
Date de publication:
06 2019
06 2019
Historique:
received:
17
07
2018
accepted:
10
01
2019
revised:
06
01
2019
pubmed:
28
2
2019
medline:
2
10
2020
entrez:
28
2
2019
Statut:
ppublish
Résumé
Anemia is common in critically ill patients with traumatic brain injury, and often requires red blood cell transfusion. Studies suggest that prolonged storage causes lesions of the red blood cells, including a decreased ability to carry oxygen. Considering the susceptibility of the brain to hypoxemia, victims of traumatic brain injury may thus be more vulnerable to exposure to older red blood cells. Our study aimed to ascertain whether the administration of fresh red blood cells (seven days or less) results in a better neurologic outcome compared with standard red blood cells in critically ill patients with traumatic brain injury requiring transfusion. The Age of Blood Evaluation in traumatic brain injury (ABLE-tbi) study was a nested study within the ABLE study (ISRCTN44878718). Our primary outcome was the extended Glasgow Outcome Scale (GOSe) at six months. In the ABLE study, 217 subjects suffered a traumatic brain injury: 110 in the fresh group, and 107 in the standard group. In the fresh group, 68 (73.1%) of the patients had an unfavourable neurologic outcome (GOSe ≤ 4) compared with 60 (64.5%) in the standard group (P = 0.21). Using a sliding dichotomy approach, we observed no overall effect of fresh red blood cells on neurologic outcome (odds ratio [OR], 1.34; 95% confidence interval [CI], 0.72 to 2.50; P = 0.35) but observed differences across prognostic bands with a decreased odds of unfavourable outcome in patients with the best prognosis at baseline (OR, 0.33; 95% CI, 0.11 to 0.96; P = 0.04) but an increased odds in those with intermediate and worst baseline prognosis (OR, 5.88; 95% CI,1.66 to 20.81; P = 0.006; and OR, 1.67; 95% CI, 0.53 to 5.30; P = 0.38, respectively). Overall, transfusion of fresh red blood cells was not associated with a better neurologic outcome at six months in critically ill patients with traumatic brain injury. Nevertheless, we cannot exclude a differential effect according to the patient baseline prognosis. ABLE study (ISRCTN44878718); registered 22 August, 2008.
Sections du résumé
BACKGROUND
Anemia is common in critically ill patients with traumatic brain injury, and often requires red blood cell transfusion. Studies suggest that prolonged storage causes lesions of the red blood cells, including a decreased ability to carry oxygen. Considering the susceptibility of the brain to hypoxemia, victims of traumatic brain injury may thus be more vulnerable to exposure to older red blood cells.
METHODS
Our study aimed to ascertain whether the administration of fresh red blood cells (seven days or less) results in a better neurologic outcome compared with standard red blood cells in critically ill patients with traumatic brain injury requiring transfusion. The Age of Blood Evaluation in traumatic brain injury (ABLE-tbi) study was a nested study within the ABLE study (ISRCTN44878718). Our primary outcome was the extended Glasgow Outcome Scale (GOSe) at six months.
RESULTS
In the ABLE study, 217 subjects suffered a traumatic brain injury: 110 in the fresh group, and 107 in the standard group. In the fresh group, 68 (73.1%) of the patients had an unfavourable neurologic outcome (GOSe ≤ 4) compared with 60 (64.5%) in the standard group (P = 0.21). Using a sliding dichotomy approach, we observed no overall effect of fresh red blood cells on neurologic outcome (odds ratio [OR], 1.34; 95% confidence interval [CI], 0.72 to 2.50; P = 0.35) but observed differences across prognostic bands with a decreased odds of unfavourable outcome in patients with the best prognosis at baseline (OR, 0.33; 95% CI, 0.11 to 0.96; P = 0.04) but an increased odds in those with intermediate and worst baseline prognosis (OR, 5.88; 95% CI,1.66 to 20.81; P = 0.006; and OR, 1.67; 95% CI, 0.53 to 5.30; P = 0.38, respectively).
CONCLUSION
Overall, transfusion of fresh red blood cells was not associated with a better neurologic outcome at six months in critically ill patients with traumatic brain injury. Nevertheless, we cannot exclude a differential effect according to the patient baseline prognosis.
TRIAL REGISTRATION
ABLE study (ISRCTN44878718); registered 22 August, 2008.
Identifiants
pubmed: 30809776
doi: 10.1007/s12630-019-01326-7
pii: 10.1007/s12630-019-01326-7
doi:
Types de publication
Comparative Study
Journal Article
Multicenter Study
Randomized Controlled Trial
Langues
eng
Sous-ensembles de citation
IM
Pagination
696-705Subventions
Organisme : Department of Health
ID : 09/144/51
Pays : United Kingdom