title: Plasma fentanyl concentrations and clinical observations during and after operation.
mesh_terms: D000005:Abdomen / Q000601:surgery*; D000328:Adult; D004334:Drug Administration Schedule; D005260:Female; D005283:Fentanyl / Q000008:administration & dosage / Q000097:blood*; D006801:Humans; D011446:Prospective Studies; D013997:Time Factors
chemical_list: D005283:Fentanyl