title: Poor prediction of blood transfusion requirements in adult liver transplantations from preoperative variables.
abstract: OBJECTIVE
  To assess the ability of preoperative information to predict intraoperative blood transfusion requirements in adult orthotopic liver transplantation.
  
  
  METHODS
  Retrospective review.
  
  
  METHODS
  Liver transplantation program in a referral center.
  
  
  METHODS
  583 sequential adult patients undergoing orthotopic liver transplantation.
  
  
  METHODS
  Preoperative variables with a previously demonstrated relationship to intraoperative transfusion were identified from the literature. These variables were then collected retrospectively from 583 consecutive liver transplantations. Relationships between these and intraoperative blood transfusion requirements were examined by both univariate analyses and multiple linear regression analysis.
  
  
  RESULTS
  Univariate analysis revealed significant associations between blood transfused and the following preoperative variables: age, gender, diagnosis, presence of grade 3 or 4 encephalopathy, pseudocholinesterase, creatinine, bilirubin, mean pulmonary artery pressure, activated partial thromboplastin time, and platelet count. Multiple linear regression analysis with correction for diagnosis identified age, creatinine, bilirubin, and pseudocholinesterase as independent predictors; for the final model r(2) = 0.22.
  
  
  CONCLUSIONS
  Preoperative variables are poor predictors of intraoperative transfusion requirements even when significant associations exist, identifying a small proportion of the variability observed. A predictive approach based on this method would be too inaccurate to be of clinical use. The majority of the variability in transfusion requirements during liver transplantation most likely results from intraoperative and donor organ factors.
authors.affiliation: Department of Anesthesiology, Mayo Clinic and Foundation, Rochester, MN 55902, USA. findlay.james@mayo.edu
authors.forename: J Y
authors.initials: JY
authors.lastname: Findlay
authors.forename: S R
authors.initials: SR
authors.lastname: Rettke
mesh_terms: D000704:Analysis of Variance; D001803:Blood Transfusion / Q000379:methods*; D015150:Echocardiography, Doppler; D005260:Female; D006501:Hepatic Encephalopathy; D006801:Humans; D016031:Liver Transplantation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012044:Regression Analysis; D012086:Reoperation; D012189:Retrospective Studies