Masui. The Japanese journal of anesthesiology
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The spread and time to two-segment regression of spinal anesthesia with 0.25% hyperbaric bupivacaine 2.0 ml (5 mg) were studied clinically in 20 patients for elective lower extremity, urological or gynecological surgery. Lumbar puncture was performed at the L 3-4 interspace with the patient in horizontal lateral decubitus positions using a 25-G Quincke needle. After injection of the local anesthetic solution at the rate of 0.2 ml.sec-1, the patient was placed immediately in supine position. ⋯ Maximum sensory block level was Th 10.6 +/- 2.3, and time to two-segment regression was 51.5 +/- 14.6 min. Complete motor block was observed in three out of twenty patients (15%). These results indicate that spinal anesthesia with 0.25% hyperbaric bupivacaine is useful for a short case, which dose not require motor block or is performed as day-care surgery.