Background: In Percutaneous Nephrolithotomy, the track may be dilated using numerous incremental flexible Amplatz type, Alken metal telescopic dilators, or balloons (PCNL) (PCNL). The balloon dilator is the most expensive method. In both cases, the gradual dilation methods take longer and are more prone to failure. The goal of this study was to evaluate the effectiveness of metal telescopic dilatation vs a single dilatation procedure in percutaneous nephrolithotomy. Material and methods: All adult patients undergoing PCNL surgery for renal or upper ureteric stone disease were included in the analysis. One hundred patients were used in this study, and they were randomly divided into two Categories. Category 1 patients were treated with MTD, whereas Category 2 patients underwent OSD. After the nephroscope was dilated enough, its sheath was inserted. In this case, pneumatic lithotripsy was used once the stone was located. As soon as the fragments were extracted, a standard DJ stent was placed across the ureter into the bladder. The patient was turned supine and sent to the ward when they were stabilised.