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Objective <p>To evaluate the pulse characteristics and the risk of fiber fracture (ROF) of the novel hybrid Thulium: Yttrium-Aluminium-Garnet (Tm: YAG) laser generator (RevoLix™ HTL, OmniGuide, USA).</p> Materials and methods <p>The RevoLix HTL laser was characterized using single-use 200&#xa0;μm and 272&#xa0;μm core-diameter fibers. Pulse characteristics (pulse profile, duration, and peak power (PP)), were assessed using the 272&#xa0;μm fiber, employing a wattmeter and a photodiode. The ROF was evaluated using both 200&#xa0;μm and 272&#xa0;μm fibers, after 5&#xa0;min of continuous laser activation (CLA) at five decreasing fiber bend radii (1, 0.9, 0.75, 0.6, and 0.45&#xa0;cm). Pulse shape, duration, and PP were studied across three effect settings (50%, 75%, and 100%) with energy levels ranging from 0.5 to 1&#xa0;J and 5 to 50&#xa0;Hz frequencies. Each experiment was repeated three times.</p> Results <p>The RevoLix HTL exhibited a near-rectangular pulse profile consistent across all tested settings. At 100% effect, pulse durations ranged from 1,102 µs (30&#xa0;Hz/0.5&#xa0;J) to 2,182 µs (10&#xa0;Hz/1 J), while PP ranged from 381&#xa0;W (40&#xa0;Hz/0.5&#xa0;J) to 565&#xa0;W (15&#xa0;Hz/1 J). At 75% and 50% effects, pulse durations ranged from 1,138 µs (30&#xa0;Hz/0.5&#xa0;J) to 3,043.67 µs (40&#xa0;Hz/1 J), while PP ranged from 325&#xa0;W (29&#xa0;Hz/0.5&#xa0;J) to 473&#xa0;W (40&#xa0;Hz/0.8&#xa0;J). Across all conditions, pulse energy remained consistent regardless of the effect value. A total of 39 settings were evaluated, and no fiber fractures were observed, even at a bend radius of 0.45&#xa0;cm.</p> Conclusion <p>The RevoLix HTL laser provides a uniform pulse profile, stable PP, and robust fiber safety under various settings. These findings highlight its potential as a reliable and safe tool for lithotripsy. Further clinical studies are warranted to validate these results in vivo.</p>

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In vitro evaluation of pulse profile, peak power, and fiber safety of the new diode-pumped RevoLix HTL Tm: YAG laser

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Stefano Moretto,
  • A. Madden,
  • A. Quarà,
  • F. Zorzi,
  • A. Bravo-Balado,
  • L. M. I. Jannello,
  • S. Kutchukian,
  • J. Cabrera,
  • M. Corrales,
  • L. Candela,
  • L. Berthe,
  • C. Gorny,
  • F. Coste,
  • M. Chicaud,
  • S. Doizi,
  • O. Traxer,
  • F. Panthier

摘要

Objective

To evaluate the pulse characteristics and the risk of fiber fracture (ROF) of the novel hybrid Thulium: Yttrium-Aluminium-Garnet (Tm: YAG) laser generator (RevoLix™ HTL, OmniGuide, USA).

Materials and methods

The RevoLix HTL laser was characterized using single-use 200 μm and 272 μm core-diameter fibers. Pulse characteristics (pulse profile, duration, and peak power (PP)), were assessed using the 272 μm fiber, employing a wattmeter and a photodiode. The ROF was evaluated using both 200 μm and 272 μm fibers, after 5 min of continuous laser activation (CLA) at five decreasing fiber bend radii (1, 0.9, 0.75, 0.6, and 0.45 cm). Pulse shape, duration, and PP were studied across three effect settings (50%, 75%, and 100%) with energy levels ranging from 0.5 to 1 J and 5 to 50 Hz frequencies. Each experiment was repeated three times.

Results

The RevoLix HTL exhibited a near-rectangular pulse profile consistent across all tested settings. At 100% effect, pulse durations ranged from 1,102 µs (30 Hz/0.5 J) to 2,182 µs (10 Hz/1 J), while PP ranged from 381 W (40 Hz/0.5 J) to 565 W (15 Hz/1 J). At 75% and 50% effects, pulse durations ranged from 1,138 µs (30 Hz/0.5 J) to 3,043.67 µs (40 Hz/1 J), while PP ranged from 325 W (29 Hz/0.5 J) to 473 W (40 Hz/0.8 J). Across all conditions, pulse energy remained consistent regardless of the effect value. A total of 39 settings were evaluated, and no fiber fractures were observed, even at a bend radius of 0.45 cm.

Conclusion

The RevoLix HTL laser provides a uniform pulse profile, stable PP, and robust fiber safety under various settings. These findings highlight its potential as a reliable and safe tool for lithotripsy. Further clinical studies are warranted to validate these results in vivo.