The blood urea nitrogen or BUN is a blood test that measures the amount of urea nitrogen in the bloodstream. It reflects how well your kidneys are. When a person is dehydrated, false results might be obtained as BUN levels increase when blood is concentrated. Elevated BUN levels indicate dehydration, excessive protein intake and impaired renal function. Low BUN levels indicate over hydration, liver damage and malnutrition.
The Urease Test Determines whether or not a microorganism can hydrolyze urea, a process that releases ammonia and produces a color change in pH indicators Urease hydrolyzes urea to form ammonia, water and CO2. Christensen urea agar is preferred In agar form, the slant is inoculated, not stabbed Phenol red is the pH indicator The resulting alkaline pH from hydrolysis of urea is indicated by a bright pink color
New blood test identifies stroke risk following heart surgery with greater accuracy than present methods.
The results of a blood test done immediately after heart surgery can be a meaningful indicator of postoperative stroke risk, a study by researchers at Wake Forest Baptist Medical Center has found. An acutely elevated level of blood urea nitrogen (BUN), a measure of kidney function detected through blood testing, was the most powerful predictor of postoperative stroke among the study’s subjects.