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Stones that are between 4 mm (0.16 in.) and 2 cm (0.8 in.) in diameter are most likely to be treated with ESWL(Extracorporeal shock wave lithotripsy).
However the decision as to which technique will be used depends on the following factors like stone location,number of and sizes of stones,stone composition as well.
The success rate of lithotripsy in the first sitting is about 70-80%.
But in some cases, where the stones are very large, more sittings are required. the success rate after 2 or 3 sittings is close to 90%.
But since this procedure needs no surgery, and causes no complication, it is a very safe and effective procedure.
Risks of lithotripsy are very low however can cause a bruise around the kidney which is called a perirenal hematoma,infection,pain. The odds of damaging surrounding structures such as the pancreas are extremely low. Biggest risk is the need for a second procedure if there is left over stone.
For further details-
As you have no associated pain,urinary tract infection now so you need to be seen by a Urologist for a clinical examination.
And if you pass a stone then you should keep it in a packet and send it for stone analysis.
You need to undergo KUB X-ray to locate the exact position of your stone in urinary tract.
Also it's good to undergo urinalysis to rule out microscopic hematuria(blood in urine).
You should drink plenty of fluids.
And continue Lemonade that has been shown in studies to have enough citrate content to prevent stone formation.
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