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Healthy Living

Diagnostic Tests

When you experience some of the symptoms, your doctor may want you to undergo some tests.


Blood Tests

Blood tests are done to check the levels of
  • Creatinine in the blood
  • Urea Nitrogen in the blood

Creatinine

In all of us activity leads to the breakdown of muscle. This is then replaced by body building foods. When the muscle breaks down a waste product called creatinine is produced. This is moved from the blood to the urine by the kidneys. When kidneys are not working well, creatinine builds up in the blood.

The normal (serum) creatinine range is 0.6 to 1.2 mg/dl. However, some labs may define the normal range a little differently. Besides, your diet may also have an impact on the creatinine level. However, if your creatinine level is consistently beyond the normal range, there is reason to believe that your kidneys have a problem.


Blood Urea Nitrogen (BUN)

Urea is a waste product in the blood. This is produced when the cells take protein from the blood. Urea contains nitrogen. It is the work of the kidneys to expel urea from the blood into the urine. If your kidney functions are affected, more urea than is normal is found in the blood.

Normal blood contains 7 to 20 milligrams of urea per decilitre of blood. If your BUN is more than 20 mg/dl, your kidneys may not be working at full strength. An increase in BUN could also suggest other health problems.


Urine Tests

Creatinine Clearance

Another way to measure kidney function is the Creatinine Clearance test. This test shows how fast your kidneys remove creatinine from the blood. Clearance is measured in millilitres per minute (ml/min).

Urine is collected for 24 hours. At the end of the 24 hours a blood sample is also taken. Creatinine Clearance is arrived at by comparing the amount of creatinine in your urine to the amount of creatinine in your blood. Calculate your Creatinine Clearance value now.

Proteinuria

Normally, kidneys filter out wastes from blood. They also reabsorb any nutrients that may have gone out with the wastes. When the kidneys are affected proteins, so valuable to the body, begin to slip out with the wastes. This leads to a condition called proteinuria.

Urine is frothy for patients with proteinuria. To check if you have this problem, urine may be collected over 24 hours.

Ultrasonogram

When there is enough evidence in your blood and urine tests to suggest a problem, the first test you will be asked to take an ultrasonogram of the abdominal area. This will help the doctor to study your kidneys, bladder and ureter. You may be asked to go in for a Computer Aided Tomography (CAT) scan or Magnetic resonance Imaging (MRI). These help to detect if there are growths or obstructions in your kidney.

Biopsy

A renal biopsy involves snipping off of a tiny bit of kidney tissue for study under a microscope. You will be hospitalised for a day when this is done. This study helps to know if there is any problem at the cellular level in the kidneys.


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