title: Comparison of low-dose spinal anesthesia and single-shot femoral block combination with conventional dose spinal anesthesia in outpatient arthroscopic meniscus repair.
abstract: OBJECTIVE
  In the current prospective, randomized study, we aimed to compare the effects of low dose selective spinal anesthesia with 5 mg of hyperbaric bupivacaine and single-shot femoral nerve block combination with conventional dose selective spinal anesthesia in terms of intraoperative anesthesia characteristics, block recovery characteristics, and postoperative analgesic consumption.
  
  
  METHODS
  After obtaining institutional Ethics Committee approval, 52 ASA I-II patients aged 25-65, undergoing arthroscopic meniscus repair were randomly assigned to Group S (conventional dose selective spinal anesthesia with 10 mg bupivacaine) and Group FS (low-dose selective spinal anesthesia with 5mg bupivacaine +single-shot femoral block with 0.25% bupivacaine). Primary endpoints were time to reach T12 sensory block level, L2 regression, and complete motor block regression. Secondary endpoints were maximum sensory block level (MSBL); time to reach MSBL, time to first urination, time to first analgesic consumption and pain severity at the time of first mobilization.
  
  
  RESULTS
  Demographic characteristics were similar in both groups (p > 0.05). MSBL and time to reach T12 sensory level were similar in both groups (p > 0.05). Time to reach L2 regression, complete motor block regression, and time to first micturition were significantly shorter; time to first analgesic consumption was significantly longer; and total analgesic consumption and severity of pain at time of first mobilization were significantly lower in Group FS (p < 0.05).
  
  
  CONCLUSIONS
  The findings of the current study suggest that addition of single-shot femoral block to low dose spinal anesthesia could be an alternative to conventional dose spinal anesthesia in outpatient arthroscopic meniscus repair.
  
  
  BACKGROUND
  NCT02322372.
authors.affiliation: Department of Anesthesiology and ICU, Ankara University, Faculty of Medicine, Ankara, Turkey. sanemcakar@yahoo.com.
authors.forename: K S Cakar
authors.initials: KS
authors.lastname: Turhan
authors.forename: R
authors.initials: R
authors.lastname: Akmese
authors.forename: F
authors.initials: F
authors.lastname: Ozkan
authors.forename: F F
authors.initials: FF
authors.lastname: Okten
mesh_terms: D000328:Adult; D000368:Aged; D000556:Ambulatory Surgical Procedures / Q000379:methods*; D000775:Anesthesia, Spinal / Q000379:methods*; D000779:Anesthetics, Local / Q000008:administration & dosage; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001182:Arthroscopy / Q000379:methods*; D001340:Autonomic Nerve Block / Q000379:methods*; D002045:Bupivacaine / Q000008:administration & dosage; D004359:Drug Therapy, Combination; D005260:Female; D005267:Femoral Nerve; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D000779:Anesthetics, Local; D002045:Bupivacaine