Blood test is performed on one sample of our blood. On one hand, it can help detect kidney damage and diagnose kidney disease. On the other hand, blood tests can reveal how well kidneys are working for kidney disease patients. Different items have different functions.
Tests to detect kidney damage
The levels of urea and creatinine in blood are commonly seen in the report of blood test.
- Urea: It is a waste product generated from protein breakdown and discharged from the body via kidneys. When more than 50% of kidney function is lost, BUN, blood urea nitrogen, will be higher than the normal.
- Creatinine: It forms during muscle metabolism. Kidneys are responsible for removing it from the body. Just like BUN, it can also help detect kidney damage and it is more accurate.
- Creatinine clearance: It measures the amount of creatinine in our urine and blood. It can reveal how well kidneys are filtering wastes.
Tests to indicate kidney function
Glomerular filtration rate (GFR) measures how much blood flows through kidneys every minute. Compared with other tests, GFR is the most reliable indicator for kidney function. Normally, the value of GFR is about 90-120ml/min.
Other blood tests
Addition to cleansing blood, regulating electrolyte balance is another important function of kidneys. Tests of potassium, sodium, phosphorus, calcium, PTH, etc, are just taken to determine whether the electrolyte balance is disturbed.
Blood tests is commonly seen for kidney disease patients or people who are suspected to have kidney disorder. If you have done blood tests, you can ask the online doctor to help you analyze the report.