What Size Kidney Stones Are Considered Large. Any kidney stone that is above 6 mm in diameter is considered a large kidney stone as stated by nhs. Calcium oxalate uric acid struvite and cystine.
They considered any kidney stone over 2 5cm 0 98 inches to be large and the average size of the large stones in their study was 3cm 1 18 inches. The 9 mm stone is a big stone for your kidney and to big to pass on it s own. A kidney stone may be treated with shockwave lithotripsy uteroscopy percutaneous nephrolithomy or nephrolithotripsy.
Such stones will not get better on their own so medical treatment may be required to heal.
A kidney stone is likely considered too large to pass on its own if it is larger than 5 8 mm in size. Stone size is important in trying to predict which stones will pass on their own. It will take maybe two surgeries if the stone has harden to much. Based on their size they may get struck in the urinary tract and cause extreme pain and bleeding during urination.