Diagnostic Tests for Kidney disease


Diagnostic Test list for Kidney disease: The list of diagnostic tests mentioned in various sources as used in the diagnosis of Kidney disease includes:

Tests and diagnosis discussion for Kidney disease: If you have lost at least half of normal kidney function (serum creatinine greater than 2 mg/dL) and have a low Hct, the most likely cause of anemia is decreased EPO production. The National Kidney Foundation's Dialysis Outcomes Quality Initiative (DOQI) recommends that doctors begin a detailed evaluation of anemia in men and postmenopausal women on dialysis when the Hct value falls below 37 percent. For women of childbearing age, evaluation should begin when the Hct falls below 33 percent. The evaluation will include tests for iron deficiency and blood loss in the stool to be certain there are no other reasons for the anemia.

When To Evaluate Dialysis Patients for Anemia
Hematocrit (Hct) Hemoglobin (Hgb)
Women who menstruate less than 33% less than 11 g/dL
All men and postmenopausal women less than 37% less than 12 g/dL
Source: The National Kidney Foundation's Dialysis Outcomes Quality Initiative.1

Healthy kidneys remove wastes and excess fluid from the blood. Blood tests show whether the kidneys are failing to remove wastes. Urine tests can show how quickly body wastes are being removed and whether the kidneys are also leaking abnormal amounts of protein. 2

Serum creatinine. Creatinine (kree-AT-uh-nin) is a waste product that comes from meat protein in the diet and also comes from the normal wear and tear on muscles of the body. Creatinine levels in the blood can vary, and each laboratory has its own normal range. In many labs the normal range is 0.6 to 1.2 mg/dL. Higher levels may be a sign that the kidneys are not working properly. As kidney disease progresses, the level of creatinine in the blood increases. 2

Blood urea nitrogen (BUN). Urea nitrogen (yoo-REE-uh NY-truh-jen) also is produced from the breakdown of food protein. A normal BUN level is between 7 and 20 mg/dL. As kidney function decreases, the BUN level increases. 2

Some urine tests require only a few ounces of urine. But some tests require collection of all urine produced for a full 24 hours. A 24-hour urine test shows how much urine your kidneys produce in 1 day. The test also can give an accurate measurement of how much protein leaks from the kidney into the urine in 1 day. 2

A creatinine clearance test compares the creatinine in a 24-hour sample of urine to the creatinine level in the blood, to show how many milliliters of blood the kidneys are filtering out each minute (mL/min). 2

Diagnosis of Kidney disease: medical news summaries: The following medical news items are relevant to diagnosis of Kidney disease:

1. excerpt from Anemia in Kidney Disease and Dialysis: NIDDK
2. excerpt from Medical Tests of Kidney Function: NIDDK

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