Inclusion Criteria:  All patients above 16 yrs of age undergoing PCNL in Tribhuvan University Teaching Hospital.  Exclusion Criteria:  Patient ≤16 years of age, known history of hypersensitivity/anaphylaxis/ contraindications to bupivacaine, Systemic Diseases (CKD, active UTI, untreated sepsis), Relook surgery, high ASA grade ( >2) unfit for anesthesia/PCNL , Contraindications for PCNL (pregnancy, coagulopathy) , Patients who decline to participate