title: Effect of position changes after spinal anesthesia with low-dose bupivacaine in elderly patients: sensory block characteristics and hemodynamic changes.
abstract: BACKGROUND
  The purpose of this study is to compare the anesthetic characteristics in elderly patients who remain in sitting position for 2 min compared with patients that are placed in supine position after induction of spinal anesthesia.
  
  
  METHODS
  Fifty-seven patients scheduled for transurethral surgery were randomized to assume supine position immediately after 6.5 mg hyperbaric bupivacaine were injected (L group) or to remain in the sitting position for 2 minutes before they also assumed the supine position (S group). Analgesic levels were assessed bilaterally, using pin-prick. Motor block was scored using a 12-point scale. The mean arterial pressure and heart rate were also recorded.
  
  
  RESULTS
  Sensory block levels were significantly lower at all time points for the L group. However, there were no significant differences in the degree of the motor block and hemodynamic changes between the two groups. However, in the L group, ephedrine or atropine were administered to three patients.
  
  
  CONCLUSIONS
  We concluded that performing a spinal anesthesia in sitting position was technically easier and induced less hypotension.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Chungju Hospital, Konkuk University School of Medicine, Chungju, Korea.
authors.forename: Hye Young
authors.initials: HY
authors.lastname: Kim
authors.forename: Myeong Jong
authors.initials: MJ
authors.lastname: Lee
authors.forename: Mi-Na
authors.initials: MN
authors.lastname: Kim
authors.forename: Ji-Sub
authors.initials: JS
authors.lastname: Kim
authors.forename: Won Sang
authors.initials: WS
authors.lastname: Lee
authors.forename: Kyu Chang
authors.initials: KC
authors.lastname: Lee
keywords: Bupivacaine; Geriatric; Sensory block; Spinal
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