Ultrasound-guided Percutaneous Nephrostomy Model

Case ID:

This invention is a surgical training model for ultrasound-guided ablation of kidney stones. This model includes the following features for optimal surgical training: kidney structure, kidney stones, ribs, paraspinous muscle, and fluid drip.


Percutaneous nephrolithotomy (PCNL) is a medical procedure to treat large kidney stone accumulation (stones larger than 2 cm), involving obtaining percutaneous access to the patient’s kidney. PCNL is a challenging procedure in part because of the complexity of obtaining safe access to the kidney. This procedure traditionally involved fluoroscopy, however that method exposed the patient and the medical team to harmful ionizing radiation. In addition, flouroscopic imaging has the potential to injure the skin or the renal capsule. PCNL can now be performed with ultrasound imaging alone. However, since this is still a new technique, there is a need for a training simulation model for ultrasound-guided percutaneous nephrostomy.



  • Ultrasound-guided training for percutaneous nephrolithotomy



  • Inexpensive
  • Includes multiple anatomical features
  • Realistic

Status: issued U.S. patent #11,375,985

Patent Information:
Contact For More Information:
Mitch Graffeo
Sr. Licensing Manager - COM-T
The University of Arizona
Lead Inventor(s):
Marissa Lovett
David Biffar
Allan Hamilton
David Tzou
Michael Phung
Benjamin Lee