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Kidney Stone Analysis

This is a test done on a kidney stone to see what chemical it is made of. The test is done on a kidney stone that has been passed in urine or removed from the urinary tract during the surgery. Chemical analysis of kidney stone shows the type of stone and give information that may prevent more stones from forming by guiding the treatment. People who have had the kidney stone have a chance of having again, so prevention measures are important.

A kidney stone forms in the kidney from substances that may normally pass out of the body in the urine. When there are large quantity of these substances, they may separate from the urine and form kidney stones.
A kidney stone analysis is done to: Find the chemical makeup of a kidney stone; guide treatment for a kidney stone and to give information on how to prevent more kidney stones from forming.

How To Prepare
If you think you might have a kidney stone, consult your doctor. He or she may have you collect the stone by straining your urine through a fine-mesh strainer or through fine gauze. Straining of the first urine specimen in the morning is important, as the stone may pass into your bladder during the night.

Look carefully at the strainer for a kidney stone. It may look like a sand grain or a small piece of gravel. The stone you find should be kept dry and do not put it in fluid or urine. Put it in a cup covered with a lid or a plastic bag. Take it to the lab for analysis. Don’t put tape on the kidney stone because it can change the test result.

How It Is Done
The kidney stone taken to the lab will be cleaned of the blood or tissue and then examined to find what chemicals it is made of.

How It Feels
The kidney stone collected is tested by passing it in urine. Passing a stone may be painless or very painful. The pain can suddenly begin and may come and go. A small sand-sized stone may pass with little pain. A large stone may cause a lot of pain in lower back, in groin and in genitals, as it moves down the ureters or the urethra.

A small stone might pass without medical treatment. A larger stone will require surgery or another type of procedure to get it out.

Risks
There is no chance for problems with kidney stone analysis. But a kidney stone can have bacteria that can cause a urinary tract infection or damage the kidney, especially if the stone is a staghorn / struvite stone or may block the urinary tract. This can happen while the stone passes through the tract.

Results
Kidney stone analysis is a test which is done on a kidney stone to see what chemicals are in it. About 80% of kidney stones are made of calcium oxalate, calcium phosphate, or a combination of both and about 10% – 15% of kidney stones are made of magnesium ammonium phosphate about 5% – 10% of kidney stones are of uric acid. And also less than 1% of kidney stones are made of a chemical called cystine.

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