title: Blood loss following orthognathic surgery varies widely and sometimes transfusions are needed.
abstract: BACKGROUND
  Blood loss in orthognathic surgery: a systematic review. Piñeiro-Aguilar A, Somoza-Martín M, Gandara-Rey JM, García-García A. J Oral Maxillofac Surg 2011;69(3):885-92.
  
  
  METHODS
  Thomas B. Dodson, DMD, MPH PURPOSE/QUESTION: To determine the range of information available to help surgeons better prepare themselves, their patients, and the auxiliary support for orthognathic surgery and transfusion requirements
  
  
  BACKGROUND
  Information not available
  
  
  METHODS
  Systematic review
  
  
  METHODS
  Level 2: Limited-quality, patient-oriented evidence
  
  
  METHODS
  Grade C: Consensus, disease-oriented evidence, usual practice, expert opinion, or case series for studies of diagnosis, treatment, prevention, or screening.
authors.affiliation: Center for Applied Clinical Investigations, Departments of OMS, Harvard School of Dental Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. tbdodson@partners.org
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Dodson