title: Blood transfusion practices in total joint arthroplasties in Jamaica.
abstract: BACKGROUND
  Major blood loss usually occurs in both hip and knee arthroplasty, frequently leading to the need for blood transfusion. This study was performed to determine blood transfusion rates and analyze the factors which affected the need for blood transfusion in patients who underwent primary unilateral total knee and hip arthroplasties at the University Hospital of the West Indies, Jamaica.
  
  
  METHODS
  A prospective study of 118 patients who underwent unilateral total knee and total hip arthroplasties between January 2004 and July 2009 was undertaken. Data collected was analyzed using Microsoft Excel 2008, SPSS version 12 and Stata version 7.0.
  
  
  RESULTS
  Of the 118 patients, 90 (70%) were females. Mean ± standard deviation (SD) age was 65.2 ± 11.5 years (range 32 - 85 years). Osteoarthritis accounted for the majority (88%) of arthroplasties. Mean ± SD estimated blood loss for all arthroplasties was 1195.0 ± 855.6 ml (range 100 - 6000 ml). Mean ± SD duration of surgery for all joint arthroplasties was 226.1 ± 63.5 minutes (range 110 - 392 minutes). Mean ± SD preoperative hemoglobin was 12.09 g/dl (range 7.3 - 15.6 g/dl). Average body mass index was 28.9 kg/m(2) (range 17.9 - 68.3 kg/m(2)). Seventy-five (64%) patients were transfused and of these, 44 patients received allogenic blood only; 20 patients received autologous blood only, and eleven patients received both allogenic and autologous blood.  The overall blood transfusion rate was 63%.
  
  
  CONCLUSIONS
  In our study, the multivariate analysis showed a significant relationship (p = 0.000) only between postoperative transfusion and the estimated blood loss.
  
  
  BACKGROUND
  Blood transfusion practices; Total joint arthroplasties.
authors.affiliation: Division of Orthopaedics, Department of Surgery, Radiology, Anesthesia and Intensive Care, The University of the West Indies, Mona, Kingston 7, Jamaica.
authors.forename: Re Christopher
authors.initials: RC
authors.lastname: Rose
authors.forename: Ayana
authors.initials: A
authors.lastname: Crichlow
authors.forename: Christine
authors.initials: C
authors.lastname: Walters
authors.forename: Andrew
authors.initials: A
authors.lastname: Ameerally
authors.forename: Georgiana
authors.initials: G
authors.lastname: Gordon-Strachan