Four cases of unilateral epidural analgesia.
D000293:Adolescent; D000368:Aged; D000773:Anesthesia, Obstetrical; D000775:Anesthesia, Spinal / Q000009:adverse effects*; D003287:Contrast Media; D005260:Female; D006552:Hernia, Inguinal / Q000601:surgery; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D010690:Phlebography; D011247:Pregnancy; D013131:Spine / Q000000981:diagnostic imaging; D014648:Varicose Veins / Q000601:surgery
D003287:Contrast Media