BJU international
August 18, 2026 · via Europe PMC
In vitro evaluation of the new holmium:yttrium-aluminium-garnet laser with Magneto technology on behalf of the Progress and Collaboration in Endourology (PACE) group.
Martin-Illac A, Chicaud M, Letouche ML, +13 more, Kutchukian S.
AI summary — for doctors, generated from the abstract only
The new Magneto Ho:YAG laser has a long, limited-peak-power pulse that sits between conventional holmium and thulium fibre lasers, with no fibre fractures in testing.
What was studied
Bench in-vitro characterization of a 150 W Ho:YAG laser with Magneto technology, testing pulse shape, vapour bubble, power loss and fibre fracture risk.
Key findings
- Pulse durations were 0.7-1.7 ms with peak powers of about 513-1150 W and spikes within pulses.
- Vapour bubbles were wider with 550 micrometre fibres and longer-lasting with 200 micrometre fibres.
- Power loss of 13-28% occurred in saline and increased with continuous activation, more on stone.
- No fibre fractures occurred.
Clinical relevance
Helps lithotripsy surgeons understand how this system behaves relative to existing lasers when choosing settings.
Who should care
Limitations
Laboratory-only study with no clinical outcomes such as stone-free rates.
Do not infer clinical superiority; use as technical context pending clinical data.
This is an AI-generated summary of the published abstract, not a clinical recommendation. It may not reflect the full text or subsequent updates — verify against the original source before acting on it.
Abstract
Objectives
To evaluate the following characteristics of the holmium:yttrium-aluminium-garnet (Ho:YAG) laser with Magneto technology: pulse shape, shape and duration of the laser-induced vapour bubble (VB), power loss over time, and the risk of fibre fracture (RFF).
Methods
A 150 W Ho:YAG generator was characterised in vitro with Magneto technology. The pulse shape was measured using an oscilloscope. The pulse duration was measured to calculate the peak power (PP) using both a 200- and 550-μm laser fibre (LF). VB were evaluated with a 200-μm fibre using a high-speed camera (8000 frames/s). Power loss over time was obtained at the fibre tip before and after 30 s, then 1 min of continuous laser activation in saline solution and in contact with BegoStone® (BEGO GmbH & Co., Bremen, Germany). Power loss was evaluated using LFs with core diameters of 200, 365, and 550 μm. RFF was tested after 5 min of continuous laser activation or until LF fracture with different laser settings and LF bending radii (0.45, 0.6, 0.9 cm) using a 200-μm LF.
Results
The Ho:YAG laser with the Magneto technology possesses a quasi-rectangular waveform with extended pulse durations ranging between 0.7 and 1.7 ms and limited PPs between a mean (standard deviation) of 513.4 (23.3) to 1149.7 (6.9) W that increase proportionally with power. However, multiple spikes were observed within each pulse, precluding a perfectly linear plateau. Regarding VB, it was significantly wider with the 550-μm LF compared to the 200-μm LF. Conversely, the VB duration was significantly longer with the 200-μm LF. A consistent initial power loss was observed in normal saline of 13-28.0% across all LF diameters, which progressed during continuous activation of up to 1 min. This power degradation was more pronounced on synthetic BegoStone. No LF fractures were observed under the tested experimental conditions.
Conclusion
The new Ho:YAG laser with Magneto technology appears to be a promising compromise between conventional Ho:YAG and thulium fibre laser, owing to its pulse profile with a limited PP.
DOI
10.1111/bju.70425
PMID
42610757
Research metadata (titles, abstracts, authors, publication dates) is sourced from Europe PMC, which aggregates content from PubMed/MEDLINE, PubMed Central, and other providers under the U.S. National Library of Medicine (NLM/NCBI). NLM does not claim copyright on abstracts; the original journal publishers or authors may hold rights to the full articles. AI-generated summaries are derived only from the abstract, never the full text, and are always labeled as AI-generated.
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