• Anesthesiology · Nov 1999

    Randomized Controlled Trial Comparative Study Clinical Trial

    Intrathecal ropivacaine for ambulatory surgery.

    • P E Gautier, M De Kock, A Van Steenberge, N Poth, B Lahaye-Goffart, L Fanard, and J L Hody.
    • Department of Anesthesiology, Clinique Ste. Anne-St. Remi, Brussels, Belgium.
    • Anesthesiology. 1999 Nov 1;91(5):1239-45.

    BackgroundThe rationale of this study was to evaluate intrathecal ropivacaine for ambulatory surgery.MethodsOne hundred fifty patients with American Society of Anesthesiologists physical status 1 scheduled for knee arthroscopy were studied. Patients were randomly assigned to receive 4 ml of one of five isobaric intrathecal solutions: Patients in group 1 (n = 30) received 8 mg of bupivacaine; patients in group 2 (n = 30) received 8 mg ropivacaine; patients in group 3 (n = 30) received 10 mg ropivacaine; patients in group 4 (n = 30) received 12 mg ropivacaine; and patients in group 5 (n = 30) received 14 mg ropivacaine. The level and duration of sensory anesthesia were recorded along with the intensity and duration of motor block. Patients were interviewed to identify transient neurologic symptoms.ResultsIntrathecal ropivacaine 10 mg produced shorter sensory anesthesia and motor blockade than bupivacaine 8mg (152 +/- 44 min and 135 +/- 41 min vs. 181 +/- 44 min and 169 +/- 52 min, mean +/- SD; P < 0.05). However, the quality of intraoperative analgesia was significantly lower in the 10-mg ropivacaine group (P < 0.05). Ropivacaine 12 mg produced sensory and motor block almost comparable to bupivacaine 8 mg. Ropivacaine 14 mg produced sensory and motor block comparable to ropivacaine 12 mg but significantly increased the time to void. No sign of transient radicular irritation were noted.ConclusionIntrathecal ropivacaine 12 mg is approximately equivalent to bupivacaine 8 mg. At this dose, ropivacaine offers no significant advantage compared with bupivacaine.

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