A Study to Compare ShockPulse-SE vs. Trilogy Lithotripters for Removal of Large Kidney Stones


About this study

The purpose of this study is to measure how well two different devices work to break up and remove kidney stones. We are comparing a newer device to an older one to see which one is faster at breaking up kidney stones. We hypothesize that the Trilogy device will increase the stone clearance rate by 25% compared to the Shockpulse-SE device.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • ≥ 18 years of age.
  • At least one renal stone > 1.5 cm in maximum diameter as measured on preoperative CT scan.
  • Patient is scheduled to undergo a percutaneous nephrolithotomy procedure.
  • Willing and able to provide informed consent

Exclusion Criteria:

  • Pregnant.
  • Active urinary tract infection.
  • Prior shock wave lithotripsy within 3 months of study procedure.
  • Multiple percutaneous access sites are anticipated.
  • Unable or unwilling to provide informed consent.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Scottsdale/Phoenix, Ariz.

Mayo Clinic principal investigator

Mitchell Humphreys, M.D.

Closed for enrollment

More information


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Additional contact information

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