title: The role of a preprocedure systematic sonographic survey in ultrasound-guided regional anesthesia.
abstract: OBJECTIVE
  The presence of neurovascular abnormalities may increase the risk of complications following regional anesthesia techniques. Use of conventional nerve localization methods may fail to detect such abnormalities and potentially result in block failure and/or unintentional neurovascular injury.
  
  
  METHODS
  We use 2 examples to illustrate this, and the concept that systematic use of a preprocedure ultrasound (US) scan may serve as an aid both for diagnosis of abnormal anatomy, and in planning the appropriate anesthetic technique.
  
  
  RESULTS
  Use of a preprocedure US scan helped to diagnose abnormal anatomy and assisted in planning a more appropriate anesthetic technique.
  
  
  CONCLUSIONS
  We believe that a systematic sonographic survey prior to regional anesthesia can be a valuable bedside screening tool to assess the suitability and challenges involved in performing US-guided peripheral nerve block.
authors.affiliation: Department of Anesthesia and Pain Management, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada.
authors.forename: Baskar P
authors.initials: BP
authors.lastname: Manickam
authors.forename: Anahi
authors.initials: A
authors.lastname: Perlas
authors.forename: Vincent W S
authors.initials: VW
authors.lastname: Chan
authors.forename: Richard
authors.initials: R
authors.lastname: Brull
mesh_terms: D001365:Axilla / Q000000981:diagnostic imaging / Q000294:innervation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000295:instrumentation* / Q000379:methods; D011300:Preoperative Care / Q000379:methods*; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional