title: Urinary vanilinomandelic acid (VMA) immediately before and after operations performed under endotracheal general anaesthesia with diethyl ether, halothane and nitrous oxide, neuroleptanalgetic agents and nitrous oxide.
mesh_terms: D000293:Adolescent; D000328:Adult; D000770:Anesthesia, Endotracheal; D000768:Anesthesia, General; D005019:Ethyl Ethers; D005260:Female; D006221:Halothane; D006801:Humans; D008297:Male; D008875:Middle Aged; D009609:Nitrous Oxide; D011229:Preanesthetic Medication; D013315:Stress, Psychological; D014149:Tranquilizing Agents; D014642:Vanilmandelic Acid / Q000652:urine*
chemical_list: D005019:Ethyl Ethers; D014149:Tranquilizing Agents; D014642:Vanilmandelic Acid; D009609:Nitrous Oxide; D006221:Halothane