title: [Dependence of the serum concentrations of creatinine and urea on the time of day, with normal and impaired kidney function (author's transl)].
abstract: Daily variations in the serum concentrations of creatinine, urea and cortisol were studied in 7 patients without kidney or muscle disease, and in 8 patients with impaired kidney function (creatinine clearance less than 40 ml/min). Neither creatinine nor urea showed a circadian rhythm; the daily variations lay within the limits of the methodological scatter. Serum cortisol showed its known circadian rhythm in high amplitude.
mesh_terms: D000328:Adult; D000368:Aged; D001806:Blood Urea Nitrogen; D002940:Circadian Rhythm; D003404:Creatinine / Q000097:blood*; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007674:Kidney Diseases / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009135:Muscular Diseases / Q000378:metabolism; D013997:Time Factors
chemical_list: D003404:Creatinine; D006854:Hydrocortisone
vernacular_title: Abhängigkeit der Konzentrationen von Kreatinin und Harnstoff im Serum von der Tageszeit bei normaler und eingeschränkter Nierenfunktion.