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.
Creatinine Serum creatinine levels provide a more sensitive measure of renal damage than do blood urea nitrogen levels. Creatinine is a nonprotein end product of creatinine metabolism that appears in serum and amounts proportional to the body’s muscle mass.
BUN Creatinine Kidney Disease Acute Renal Failue Labs Potassium Hyperkalemia Hypokalemia Hyponatremia Sodium Lab Value Blood Hyponatremia Mnemonic Nursing Student This is a collection of my Blood Book part of BMP Fishbone diagram explaining the normals and abnormal Na K Cr Hypomagnesemia BUN Creatinine Addisons Dehydration Study Sheets for Nurses NCLEX Tips Nursing Notes Cheats nursing_labs_mnemonics_Kidney_Disease_BUN_Creatinine LABS BUN CR GFR Nursing KAMP StickEnotes
Creatinine is a waste product produced by muscle metabolism. Kidneys filter creatinine to be excreted through the urine and the renal function is reflected. Elevated levels indicate renal impairment. The opposite happens for urinary creatinine clearance; during renal impairment, urinary creatinine is extremely low. Measuring urinary creatinine clearance during unilateral kidney impairment is insignificant as the healthy kidney can still excrete creatinine through the urine.
Ammonia is a waste product produced during the synthesis of protein. The liver converts ammonia into urea so it could be excreted out of the body. When there is an abnormally high ammonia levels in the blood, liver impairment should be suspected. In preparing for ammonia plasma test, the person being tested should refrain from smoking several hours prior to the test. Potassium salts, antibiotics and alcohol may also alter ammonia levels in the blood.