title: Distribution of Injectate and Sensory-Motor Blockade After Adductor Canal Block.
abstract: BACKGROUND
  The analgesic efficacy reported for the adductor canal block may be related to the spread of local anesthetic outside the adductor canal.
  
  
  METHODS
  Fifteen patients undergoing knee surgery received ultrasound-guided injections of local anesthetic at the level of the adductor hiatus. Sensory-motor block and spread of contrast solution were assessed.
  
  
  RESULTS
  Sensation was rated as "markedly diminished" or "absent" in the saphenous nerve distribution and "slightly diminished" in the sciatic nerve territory without motor deficits. Contrast solution was found in the popliteal fossa.
  
  
  CONCLUSIONS
  The spread of injectate to the popliteal fossa may contribute to the analgesic efficacy of adductor canal block.
authors.affiliation: From the *Department of Anesthesiology, Clinique Ste Anne-St Remi, Brussels, Belgium; †Ziekenhuis, Oost-Limburg, Genk, Belgium; ‡Department of Anesthesia and Intensive Care Medecine, Liege University Hospital, Liege, Belgium; and §North American Institute for Continuing Education (NAICE), New York, New York.
authors.forename: Philippe E
authors.initials: PE
authors.lastname: Gautier
authors.forename: Admir
authors.initials: A
authors.lastname: Hadzic
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Lecoq
authors.forename: Jean Francois
authors.initials: JF
authors.lastname: Brichant
authors.forename: Maxine M
authors.initials: MM
authors.lastname: Kuroda
authors.forename: Catherine
authors.initials: C
authors.lastname: Vandepitte
mesh_terms: D000328:Adult; D000779:Anesthetics, Local / Q000008:administration & dosage* / Q000009:adverse effects / Q000493:pharmacokinetics*; D001530:Belgium; D003287:Contrast Media / Q000008:administration & dosage / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000294:innervation* / Q000601:surgery; D008297:Male; D008619:Mepivacaine / Q000008:administration & dosage* / Q000009:adverse effects / Q000493:pharmacokinetics*; D008875:Middle Aged; D009043:Motor Activity / Q000187:drug effects*; D009407:Nerve Block / Q000009:adverse effects / Q000379:methods*; D017288:Pain Threshold / Q000187:drug effects*; D014018:Tissue Distribution; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional
chemical_list: D000779:Anesthetics, Local; D003287:Contrast Media; D008619:Mepivacaine