Urea Conditions causing increased blood urea fall into three different categories: prerenal, renal, and postrenal. Prerenal azotemia can be caused by decreased blood flow through the kidneys (e.g. low blood pressure, congestive heart failure, shock, bleeding, dehydration) or by increased production of urea in the liver via a high protein diet or increased protein catabolism (e.g. stress, fever, major illness, corticosteroid therapy, or gastrointestinal bleeding). Renal causes can be attributed to decreased kidney function. These include acute and chronic kidney failure, acute and chronic glomerulonephritis, tubular necrosis, and other kidney diseases. Postrenal causes can be due to decreased elimination of urea. These could be due to urinary outflow obstruction such as by calculi, tumours of the bladder or prostate, or a severe infection.
Uremia
Hypertensive encephalopathy
Ketosis
Diabetic ketoacidosis
Albuminuria
Ketoacidosis
Cholemia
Alkalosis