Inability to inject local anesthetic into the subarachnoid space.
D000775:Anesthesia, Spinal / Q000295:instrumentation*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009339:Needles; D013346:Subarachnoid Space
D000779:Anesthetics, Local