Presented by: Victoria Jahrreiss MD
University Hospital Southampton NHS Trust, Southampton, UK; Department of Urology Medical University Vienna, Austria

Introduction

MOSES holmium laser lithotripsy uses "pulse modulation". As the clinical evidence on the efficacy of 60W Holmium laser with MOSES technology is scarce, we analysed the outcomes of patients treated with this laser at our institution.

Materials

103 consecutive patients with urinary stones (80 kidney stones and 23 ureteral stones) were treated with the 60W MOSES laser from 2020 until 2022,  and were included in our analysis.

Patient data and outcomes were prospectively collected, and analysis was performed regarding patient demographics, stone parameters, as well as stone free rate, operating time, length of stay, peri and postoperative complications.

Results

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With a median age of 55 (39-68) years, the male: female ratio was 56:47.

The median stone size was 12mm (IQR:7-19), with a mean number of urinary stones of 1.82 (SD ±1.4). While 36 (35%) patients were pre-stented, a ureteral access sheath was inserted in 36 (35%) patients. The median operative time was 44 min (IQR:22.5-59.5), and 64 (62.1%) patients received post-operative stenting. Minor perioperative complications were observed in 4 patients (3.9%) and after the first procedure 93 (90.3%) patients were stone-free. The median length of hospital stay was 1 day (IQR 0-1).

Conclusion

This study demonstrated that 60W MOSES laser was safe and efficient for the treatment of urinary stones with high stone-free rates and mild perioperative complications. More studies with larger cohorts are necessary in the future to confirm our results.

Funding

None.

Co-Authors

Francesco Ripa, MD
Department of Stones and Endourology, University College London Hospitals

Carlotta Nedbal, MD
University Hospital Southampton NHS Trust, Università Politecnica delle Marche, Ancona, Italy

Clara Cerrato, MD
University Hospital Southampton NHS Trust

Amelia Pietropaolo, MD
University Hospital Southampton NHS Trust

Bhaskar Somani, Professor
University Hospital Southampton NHS Trust