title: [Diagnostic blood losses in severe trauma patients].
abstract: OBJECTIVE
  To analyze diagnostic (blood drawings) and iatrogenic (Continuous Renal Replacement Therapy, CRRT) blood losses (BL) in severe trauma patients.
  
  
  METHODS
  A one-year descriptive, prospective and observational study. We included patients over 15 years of age, admitted with severe trauma and who had a score of > or =16 on the Injury Severity Index (ISS). Those patients in whom limitation of therapeutic effort had been indicated were excluded. A total of 225 patients with 1619 days of evolution were analyzed for volume of BL/day/patient, type of diagnostic test, clinical outcome and utilization of CRRT. The variables were described as mean +/- standard deviation with the Student's T test.
  
  
  RESULTS
  Average blood loss of patient per day was 55.5+/-32.2 cc. Statistically significant differences were found between the blood volume drawn when the first day was compared to the second day, 73.5+/-32.2 vs. 56.3+/-21.9 (p<0.001); clinical outcome (alive vs death) 54.8+/-33 vs. 60.7+/-24.9 (p<0.05); severity (ISS<31 or > or =31) 54.65+/-20 vs. 61.5+/-28.5 (p<0.001), No RRT vs RRT: 50.9+/-18.9 vs. 97.2+/-72.6 (p<0.001).
  
  
  CONCLUSIONS
  The greatest diagnostic BL occurs during the resuscitation phase, in the patients who die, in those with greater severity and those undergoing CRRT.
authors.affiliation: UCI de Trauma y Emergencias, Hospital Universitario 12 de Octubre, Madrid, España. raquelvinagregaspar@gmail.com
authors.forename: R
authors.initials: R
authors.lastname: Vinagre Gaspar
authors.forename: C
authors.initials: C
authors.lastname: Cornejo Bauer
authors.forename: A
authors.initials: A
authors.lastname: Murillo Pérez
authors.forename: E
authors.initials: E
authors.lastname: Molano Alvarez
authors.forename: O
authors.initials: O
authors.lastname: Muñoz López
authors.forename: C
authors.initials: C
authors.lastname: Morales Sánchez
authors.forename: C
authors.initials: C
authors.lastname: López López
authors.forename: A I
authors.initials: AI
authors.lastname: Cabrero Cabrero
authors.forename: M
authors.initials: M
authors.lastname: Cuenca Solanas
authors.forename: C
authors.initials: C
authors.lastname: García Fuentes
authors.forename: M
authors.initials: M
authors.lastname: Chico Fernández
authors.forename: E
authors.initials: E
authors.lastname: Alted López
mesh_terms: D000328:Adult; D000740:Anemia / Q000209:etiology*; D005260:Female; D006403:Hematologic Tests / Q000009:adverse effects*; D006801:Humans; D015601:Injury Severity Score; D008297:Male; D011446:Prospective Studies; D014947:Wounds and Injuries / Q000097:blood*