title: Trends in the utilization of blood transfusions in spinal fusion in the United States from 2000 to 2009.
abstract: METHODS
  Retrospective study.
  
  
  OBJECTIVE
  The purpose of this study was to examine the trends in the utilization of blood transfusions in spinal fusion in the United States from 2000 to 2009.
  
  
  BACKGROUND
  Spinal fusion is among the most common surgical procedures that necessitate blood transfusion. Blood transfusion methods include predonated autologous blood transfusion (PR-ABT), perioperative autologous blood transfusion (PE-ABT) (intraoperative and postoperative blood collection), and allogeneic blood transfusion (ALBT). The trends in the utilization of these blood transfusion methods in spinal fusion during the past decade are uncertain.
  
  
  METHODS
  The Nationwide Inpatient Sample was used to identify patients who underwent spinal fusion from 2000 to 2009, using the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes. Patients who received PR-ABT, PE-ABT, and ALBT were identified using the appropriate ICD-9-CM codes. Patient demographics, surgical variables, and hospital characteristics data were retrieved. Trends in the utilization of blood transfusions were analyzed.
  
  
  RESULTS
  From 2000 to 2009, there was an increasing trend in the ALBT rate (4.3%-8.0%, P < 0.001) and a decreasing trend in the PR-ABT rate (2.6%-0.7%, P < 0.001) in patients who underwent spinal fusion. The overall blood transfusion and PE-ABT rates remained stable. The ALBT rate was high in the subgroups of patients, such as pediatric and elderly patients, female patients, patients with increased Elixhauser Comorbidity Score, Medicare patients, and patients who underwent thoracolumbar, posterior, and anterior and posterior fusion.
  
  
  CONCLUSIONS
  During the past decade, the ALBT rate increased, whereas the PR-ABT rate decreased in patients who underwent spinal fusion in US hospitals. The overall blood transfusion rate remained stable; however, it may be reduced by using a patient blood management program, targeting the subgroups of patients with the high ALBT rate.
  
  
  METHODS
  3.
authors.affiliation: *Department of Orthopaedic Surgery, New York University Hospital for Joint Diseases, New York, NY †Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan; and ‡Department of Statistical Science, School of Advanced Sciences, The Graduate University for Advanced Studies, Tokyo, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yoshihara
authors.forename: Daisuke
authors.initials: D
authors.lastname: Yoneoka
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016063:Blood Loss, Surgical; D001803:Blood Transfusion / Q000706:statistics & numerical data / Q000639:trends*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012737:Sex Factors; D013123:Spinal Fusion / Q000639:trends*; D013131:Spine / Q000601:surgery*; D014481:United States; D055815:Young Adult