32 Cases of Residual Stones after Percutaneous Nephrolithotomy

Park, Dong Soo; Lee, Ho Sung; Yang, Seung Chul

Abstract

Even with the current trend toward use of the ESWL as the primary treatment method for urinary stones, the importance of PNL is not at all diminished. In addition to reduced treatment duration with combined ESWL and PNL for urinary stones, quick extrusion of fragmented stones and prevention of ureteral obstruction are also advantages. The possibility of residual stones is the most presenting problem with PNL, thus initial treatment with ESWL or other method of treating residual stones should be considered. Thus at the YUMC Department of Urology, of the 200 cases treated for urinary stones with PNL, 32 cases with residual stones were analyzed and the following results were obtained: 1. Of the 32 cases with residual stones, 12 cases had diameters of more than 3 cm, 21 cases had multiple stones, and 5 cases had single stones with diameters less than 3cm. 2. Of the 6 cases with single stones, 3 cases were located in the renal pelvis, and the remaining 2 stones were etch located in the mid and lower calyx respectively. 3. In 18 cases, more than two sessions were needed, and in all 32 cases the patients were discharged with indwelling of ureteral stent. 4. After one session of PNL, the residual stones measured more than 1cm in 10 cases, 0.5~1 cm in 8 cases and in 14 cases the stones were less than 0.5cm in diameter.