[A case of suspected dry tap during spinal anesthesia for caesarean section].

Spinal anesthesia was attempted in a 21-year-old woman for acute cesarean section with lumbar puncture at L3-4 and L4-5 in another hospital, but it was abandoned after more than 10 attempts because no cerebrospinal fluid (CSF) was seen flowing. She was transferred to our hospital, and we attempted spinal anesthesia at L2-3 and CSF was seen flowing. Although 0.5% hyperbaric bupivacaine 2.0ml was injected, the anesthetic effect was insufficient. At this point we injected 0.5% hyperbaric bupivacaine 1.5 ml in the same space and she developed sensory block up to T3. Surgery proceeded uneventfully. There were no postoperative neurological complications related to spinal anesthesia.