Renal Parenchymal Core Needle Biopsy

In this method, a larger introducing needle is used for the puncture. The introducing needle is advanced just to the outer cortex of the kidney, and the needle angle is adjusted so that the needle pathway became mostly in the renal cortex, then the biopsy needle is inserted throughout the introducing needle and at least 4 cores are obtained. In this technique, the skin surface is punctured only once during the procedure.

In this method, introducing needle is not used. Biopsy needle punctures the skin surface and the needle is advanced to about 10-15 mm into the renal cortex, and tissue sampling is done. After each sampling, the needle is removed and then for the next biopsy, the whole procedure is repeated until four cores being taken.