One common example: ­Patients who zealously follow the usual instruction to have "nothing to eat or drink the night before" can end up with high blood urea nitrogen (BUN), which assesses kidney ...

Kidney function tests evaluate how well your kidneys are functioning by measuring the levels of creatinine and blood urea ...

The use of blood urea nitrogen (BUN) concentration as a measure of renal function is even less reliable, because BUN levels can be affected by the presence of gastrointestinal bleeding or by the ...

with either low or high sodium intake it was possible to ... per liter, and the blood urea nitrogen 9.7 mg. per 100 ml. Figure 2 presents the data obtained from Case 2 between the twentieth ...