SUBARACHNOID PUNCTURE DURING ATTEMPTED EPIDURAL ANESTHESIA.
D000758:Anesthesia / Q000009:adverse effects*; D000767:Anesthesia, Epidural; D006801:Humans; D007267:Injections; D007278:Injections, Spinal; D011677:Punctures
ANESTHESIA COMPLICATIONS; INJECTIONS, INTRATHECAL