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Updated: Sep 16, 2025

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy
Published on: September 13, 2022
Ultrasonographic-guided robotic-assisted percutaneous nephrolithotomy.
Stefano Bazzani1, Stefano Puliatti2, Stefania Ferretti3
1Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Reggio Emilia, Italy. stefano.bazzani@unimore.it.
A new robotic system enhances kidney stone removal (percutaneous nephrolithotomy) by combining 3D models and ultrasound guidance. This technology helps less experienced surgeons perform precise kidney access, improving patient outcomes and procedural safety.
Area of Science:
- Urology
- Medical Robotics
- Surgical Simulation
Background:
- Percutaneous nephrolithotomy (PCNL) is the standard treatment for large kidney stones (>20 mm).
- Accurate percutaneous access is critical but technically demanding, requiring significant surgeon expertise.
- Novice surgeons often face challenges in performing the initial puncture for PCNL.
Purpose of the Study:
- To introduce and validate a novel robotic system for PCNL.
- To enhance the accuracy and safety of percutaneous kidney access.
- To facilitate the training and performance of less experienced urologists in PCNL.
Main Methods:
- Development of a robotic system integrating 3D anatomical modeling and real-time ultrasound guidance.
- Validation in a clinical simulation environment.
- Performance evaluation by experienced urologists and urology residents.
Main Results:
- The robotic system demonstrated improved surgical performance in kidney access.
- The system contributed to a reduction in human error during the procedure.
- Both experienced and novice surgeons showed enhanced confidence and accuracy with the system.
Conclusions:
- The proposed robotic system effectively improves percutaneous nephrolithotomy access.
- This technology makes complex urological procedures more accessible to less experienced clinicians.
- Robotic assistance holds significant potential for enhancing surgical training and patient safety in PCNL.
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