Collapse during spinal anaesthesia?
D000368:Aged; D000698:Analgesia; D000775:Anesthesia, Spinal; D006801:Humans; D008012:Lidocaine / Q000008:administration & dosage; D008297:Male; D010424:Pentobarbital / Q000008:administration & dosage; D011229:Preanesthetic Medication; D013575:Syncope / Q000517:prevention & control
D008012:Lidocaine; D010424:Pentobarbital