This article is from the Interpretation Of Lab Test Profiles, by Ed Uthman email@example.com with numerous contributions by others.
BUN:creatinine ratio is usually >20:1 in prerenal and postrenal
azotemia, and <12:1 in acute tubular necrosis. Other intrinsic
renal disease characteristically produces a ratio between these
The BUN:creatinine ratio is not widely reported in the UK.