Renal Blood Test Fasting. Red meats broccoli and even some medications may cause a false positive test. The routine kidney blood test is a general marker of kidney function.
A plastic needle cannula is then used to draw the test blood from a vein in the hand or arm. You should not eat or drink anything for at least 8 10 hours before having this test. The routine kidney blood test is a general marker of kidney function.
This allows for the blood samples to be collected without the use of repeated needle sticks.
Blood test imaging. If the blood test is abnormal it cannot say what is causing the kidney problem. Fasting blood glucose measures the amount of glucose sugar in your blood to test for diabetes or prediabetes. When fasting for these tests patients are not to eat or drink during the 12 hours before the test.