Blood and urine tests can help uncover signs of early kidney disease and monitor the condition.
Blood pressure. Your health care provider will devise a plan, which may include diet changes and medications, to keep your blood pressure as close to normal as possible. Target blood pressure is defined as less than 130/80.
Urine protein or albumin in the urine. Albumin is the main protein in the blood. When the kidneys become damaged, the holes in the filtering system of your kidneys become enlarged, allowing protein to leak into the urine. In the early stages of kidney damage, only small amounts of albumin (microalbuminuria) are found. This test is very important for people with diabetes because at this early stage of kidney damage, further deterioration can often be prevented by diet, exercise, and medications.
GFR (glomerular filtration rate). This is a measure of how well your kidneys are filtering your blood. An estimate of your "filtering rate" is determined by a blood test called a blood creatinine test, which measures the amount of creatinine -- a waste product -- in your blood. This test, along with your age, body size, and gender, provides an estimate of your GFR. Your GFR, or "filtering rate," helps confirm normal or low kidney function. A score of 90 or above is normal; a score below 15 indicates kidney damage that will require dialysis or a kidney transplant. Another commonly used test to estimate GFR is a creatinine clearance. This test measures the creatinine in the blood and urine to determine kidney function.
Your health care provider may also refer you to a kidney specialist, called a nephrologist, for more specialized testing. A kidney biopsy may also be performed. During a kidney biopsy a small amount of kidney tissue is removed for microscopic exam to pinpoint the cause of kidney damage and plan treatment.
If you have hyperkalemia, you have too much potassium in your blood. The body needs a delicate balance of potassium to help the heart and other muscles work properly. But too much potassium in your blood can lead to dangerous, and possibly deadly, changes in heart rhythm.