Mini PCNL / Ultra-Mini PCNL
Smaller tract percutaneous stone removal delivering PCNL efficacy with significantly less blood loss, less pain, and faster recovery — the preferred approach for 1–3 cm renal stones.
What is Mini PCNL / Ultra-Mini PCNL?
Mini PCNL and Ultra-Mini PCNL are miniaturised versions of standard percutaneous nephrolithotomy using smaller access tracts — 14–20 Fr for Mini PCNL and 11–13 Fr for Ultra-Mini PCNL. These techniques deliver the benefits of direct percutaneous stone removal with substantially reduced blood loss, less post-operative pain, shorter hospital stay, and faster recovery compared to standard PCNL. They maintain excellent stone-free rates for stones in the 1–3 cm range and are particularly valuable for paediatric patients and those with bleeding risk requiring minimised transfusion rates.
How the Procedure Works
Targeted Access
Fine needle advanced into the target calyx under combined fluoroscopic and ultrasound guidance, choosing the most direct route to the stone.
Mini Tract Dilation
Guidewire placed and the tract dilated to 11–20 Fr using a single-step or sequential dilator; a dedicated mini sheath is placed and secured.
Stone Visualisation
A miniaturised nephroscope is introduced; despite smaller diameter, modern miniscopes provide excellent optical quality and working channel access.
Fragmentation & Clearance
Stone is fragmented using holmium laser or pneumatic energy; fragments cleared by suction and basket retrieval under continuous direct vision.
Closure
Small nephrostomy tube or ureteric stent placed for drainage, or tract closed primarily in tubeless cases; skin needs only an adhesive strip.
Outcomes
Who Needs This Treatment?
- →Patients with renal stones of 1–3 cm where RIRS has failed or cannot achieve single-session clearance.
- →Children with renal stones — Mini PCNL tract sizes are proportionate to paediatric kidney anatomy.
- →Patients with a solitary kidney or impaired renal function who need minimised blood loss and trauma.
- →Those with complex lower-pole stones where direct access gives better clearance than flexible ureteroscopy.
- →Anyone wanting percutaneous stone efficacy with significantly less pain and faster return to work.
- →High-risk patients with borderline haemoglobin or cardiac disease who cannot tolerate standard PCNL blood loss.
"Mini and Ultra-Mini PCNL have given us the precision of percutaneous stone removal in a much gentler package. We now clear stones that RIRS cannot handle efficiently, with recovery times approaching those of flexible ureteroscopy."
— — Dr. Vipin Reddy, Consultant Urologist, Andrologist & Renal Transplant Surgeon
Common Questions
Frequently Asked
Not sure which treatment is right for you?
Book a consultation with Dr. Vipin Reddy and get a personalised treatment plan.