title: Transfusion of erythrocyte concentrates produces a variable increment on cerebral oxygenation in patients with severe traumatic brain injury: a preliminary study.
abstract: OBJECTIVE
  To investigate the long-term influence of erythrocyte transfusion on cerebral oxygenation in patients with severe traumatic brain injury.
  
  
  METHODS
  Prospective and observational study.
  
  
  METHODS
  Neurotrauma intensive care unit of trauma center level I.
  
  
  METHODS
  Sixty consecutive, hemodynamically stable patients with severe traumatic brain injury, pretransfusion hemoglobin<100g/l, non-bleeding and monitored through intracranial pressure and brain tissue partial pressure of oxygen (PtiO(2)) catheters were included.
  
  
  METHODS
  Transfusion of 1-2 units of red blood cells.
  
  
  RESULTS
  Ten sets of variables (pretransfusion, end of transfusion, and 1, 2, 3, 4, 5, 6, 12 and 24h after transfusion) were recorded, including: PtiO(2), cerebral perfusion pressure (CPP), end-tidal CO(2), peripheral saturation of oxygen, temperature, hemoglobin, lactate and PaO(2)/FiO(2) ratio. Transfusion was associated with an increase in PtiO(2) during a 6-h period, with a peak at 3h (26.2%; p=0.0001) in 78.3% of the patients. No relationship was observed between PtiO(2), CPP and hemoglobin increments. The relative increment in PtiO(2) at hour 3 was only correlated with baseline PtiO(2) (r(2) 0.166; p=0.001). All of the patients with basal PtiO(2)<15mmHg showed an increment in PtiO(2) versus 74.5% of patients with basal PtiO(2)>or=15mmHg (p<0.01, hour 3).
  
  
  CONCLUSIONS
  Erythrocyte transfusion is associated with a variable and prolonged increment of cerebral tissue oxygenation in anemic patients with severe traumatic brain injury. Low baseline PtiO(2) levels (<15mmHg) could define those patients who benefit the most from erythrocyte transfusion.
authors.affiliation: Neurotrauma Critical Care, Hospital Universitario "Virgen del Rocío", Avda/ Manuel Siurot, s/nr, 41013, Seville, Spain. sramon@cica.es
authors.forename: Santiago Ramón
authors.initials: SR
authors.lastname: Leal-Noval
authors.forename: María Dolores
authors.initials: MD
authors.lastname: Rincón-Ferrari
authors.forename: Ana
authors.initials: A
authors.lastname: Marin-Niebla
authors.forename: Aurelio
authors.initials: A
authors.lastname: Cayuela
authors.forename: Victoria
authors.initials: V
authors.lastname: Arellano-Orden
authors.forename: Antonio
authors.initials: A
authors.lastname: Marín-Caballos
authors.forename: Rosario
authors.initials: R
authors.lastname: Amaya-Villar
authors.forename: Carmen
authors.initials: C
authors.lastname: Ferrándiz-Millón
authors.forename: Francisco
authors.initials: F
authors.lastname: Murillo-Cabeza
mesh_terms: D000328:Adult; D001794:Blood Pressure; D001921:Brain / Q000098:blood supply*; D001930:Brain Injuries / Q000628:therapy*; D017707:Erythrocyte Transfusion; D005260:Female; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D010100:Oxygen / Q000378:metabolism*; D011446:Prospective Studies
chemical_list: D010100:Oxygen