title: [Preoperative blood ordering in elective colon surgery: requirement or routine?].
abstract: BACKGROUND
  Preoperative blood ordering is frequently in elective colon surgery, even for procedures that rarely require blood transfusion. Most often this procedure is performed without proper analysis of the real needs. The aim of this study was to evaluate the patients who receive transfusion and determining their associated factors.
  
  
  METHODS
  Retrospective study of all consecutive patients scheduled for elective colon surgery was carried out at 2007-2012. Several clinico-pathological and surgical variables were analyzed and predictive blood transfusion indices such as the cross-matched/transfusion ratio (C/T ratio), transfusion index and transfusion probability were calculated. Patients were divided in 2 groups according have received perioperative surgical transfusion or not.
  
  
  RESULTS
  There were 457 surgery patients. A total of 171 blood units, in a 74 patients were perioperative transfused. Overall cross-matched transfused ratio was 5.34, the transfusion probability 162%, and the transfusion index 0.18. Variables that were significantly associated with receiving blood transfusion in a multivariable analysis were a preoperative haemoglobin level less than 10 g/dl (OR: 309.8; 95% CI: 52.7-985.2), chronic pulmonary obstructive disease (OR: 3.7; 95% CI: 1.3-10.7), oral anticoagulant therapy (OR: 5.7; 95% CI: 1.7-19.4) and surgical time over 120 min (OR: 10.7; 95% CI: 4.7-24.1).
  
  
  CONCLUSIONS
  Likelihood of receiving perioperative transfusion in elective colon surgery is very low. Among their associated factors, the haemoglobin level less than 10 g/dl is the one with strongest association. Those patients with such low preoperative haemoglobin level should not be scheduled for elective colon surgery until they received specific treatment.
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España. Electronic address: ffvillaro@hotmail.com.
authors: Francesc
authors: F
authors: Feliu
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Juan C
authors: JC
authors: Rueda
authors: Banco de Sangre y Tejidos, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Laia
authors: L
authors: Ramiro
authors: Unidad de Medicina Preventiva y Epidemiología, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Montserrat
authors: M
authors: Olona
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Jorge
authors: J
authors: Escuder
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Fernando
authors: F
authors: Gris
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Andrea
authors: A
authors: Jiménez
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Enric
authors: E
authors: Duque
authors: Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitari Joan XXIII, Tarragona, España.
authors: Vicente
authors: V
authors: Vicente
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001803:Blood Transfusion; D003106:Colon / Q000601:surgery*; D017558:Elective Surgical Procedures; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D012189:Retrospective Studies; D055815:Young Adult
keywords: Perioperative transfusion; Preoperative surgical blood ordering; Solicitud de sangre preoperatoria; Transfusional indices; Transfusión peroperatoria; Índices transfusionales preoperatorios