If you ask most people outside of Med-Peds, most would say that Med-Peds is a new field. Actually, the initial version of combined Med-Peds training occurred in 1949 in a two year rotating internship. This was replaced by a one year post graduate program.
Your BUN-to-creatinine ratio allows doctors to monitor your kidney health. The BUN-to-creatinine ratio is a routine lab measurement used by your doctor to assess the function of your kidneys. It is calculated by dividing the serum BUN concentration by the serum creatinine concentration. Various conditions affecting your kidneys will alter this ratio in a predictable manner before you even show symptoms. Therefore, it is a useful ratio when monitoring subtle changes in your kidney health.
This results in a disproportionate rise in BUN levels relative to any change in serum creatinine levels. This elevation in the BUN-to-creatinine ratio is one of the laboratory indicators of decreased renal perfusion. The ratio is indicative of prerenal injury when the BUN-to-creatinine ratio is greater than 20.