Efficacy & Safety of High Power vs. Low Power Holmium Laser in Mini-PCNL for Large Renal Stones

Inclusion Criteria: * Age ≥ 18 years * Renal Stones \< 20 mm indicated for intervention (pain, infection, obstructing stone causing hydronephrosis or parenchymal affection) * Informed consent obtained Exclusion Criteria: * Active urinary tract infection * Bleeding diathesis * Pregnancy * Anatomical anomalies impeding access e.g. ectopic malrotated kidneys, crossed fused kidneys...etc.)