title: Hypotensive anaesthesia and blood loss in orthognathic surgery: a clinical study.
abstract: OBJECTIVE
  To find out whether hypotensive anaesthesia minimized blood loss during orthognathic surgery.
  
  
  METHODS
  A prospective randomized clinical study.
  
  
  METHODS
  53 consecutive patients, 15-33 years old, who were to have orthognathic operations were admitted to the study. They were randomly allocated to either normotensive or hypotensive anaesthesia.
  
  
  RESULTS
  Median (range) blood loss/operation (ml) under hypotensive anaesthesia was 200 (90-400)ml and under normotensive anaesthesia was 350 (130-1575)ml (P= 0.01), and those for maxillary segmental osteotomy under hypotensive anaesthesia were 85 (40-240)ml and, under normotensive anaesthesia, 175 (100-190)ml (P= 0.05).
  
  
  CONCLUSIONS
  There was pronounced reduction in blood loss during orthognathic operations done under hypotensive anaesthesia compared with those done under normotensive anaesthesia.
authors: Department of Oral and Maxillofacial Surgery, Saveetha Dental College and Hospitals, Madras, India.
authors: K
authors: K
authors: Praveen
authors: V
authors: V
authors: Narayanan
authors: M R
authors: MR
authors: Muthusekhar
authors: M F
authors: MF
authors: Baig
mesh_terms: D000293:Adolescent; D000328:Adult; D000766:Anesthesia, Dental / Q000379:methods*; D016063:Blood Loss, Surgical / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007023:Hypotension, Controlled; D008297:Male; D019647:Oral Surgical Procedures; D011446:Prospective Studies