Retrospective First-in-human use of the LithoVue™ Elite Ureteroscope to measure Intrarenal Pressure.

IRP can now be routinely measured during ureteroscopy. Patients had a median IRP of 28.5 mmHg and a maximum of 174 mmHg. The use of a smaller UAS (10/12 Fr), Asian ethnicity, and tight ureters were found to have higher IRPs.