Thulium fiber vs. holmium: YAG lasers in urology: insights from the FDA MAUDE database
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By
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Juanita Velasquez Ospina
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Etienne Gozlan
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Adam Williams
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Aravindh Rathinam
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Archan Khandekar
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Jonathan Katz
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Robert Marcovich
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Hemendra N. Shah
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October 4, 2025
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Clinical Scorecard: Comparative Analysis of Thulium Fiber and Holmium: YAG Lasers in Urology: Findings from the FDA MAUDE Database
At a Glance
| Category | Detail |
| Condition | Urologic procedures involving laser use, including lithotripsy and prostate interventions |
| Key Mechanisms | Ho: YAG laser (2120 nm wavelength) and TFL (1940 nm wavelength) operate via water absorption for stone ablation and tissue treatment |
| Target Population | Patients undergoing urologic procedures requiring laser technology |
| Care Setting | Surgical and procedural settings in urology |
Key Highlights
- TFL shows higher fiber break rates but fewer patient adverse events compared to Ho: YAG lasers.
- Ho: YAG lasers have more device malfunctions and patient events, with mostly minor (Gupta Level I) adverse events.
- FDA recall of TFL devices in 2021 led to significant reduction in patient harm and fiber breakages.
Guideline-Based Recommendations
Diagnosis
- Utilize MAUDE database surveillance to identify device-related adverse events in urologic laser procedures.
Management
- Apply FDA safety updates and software modifications post-recall to reduce thermal injury risks with TFL devices.
- Consider pulse modulation settings (e.g., MOSES) to balance fiber break rates and procedure cancellations in Ho: YAG lasers.
Monitoring & Follow-up
- Ongoing post-market surveillance of laser devices for device malfunctions and patient adverse events.
- Monitor severity of adverse events using Gupta classification to guide clinical response.
Risks
- Device malfunctions including console errors, overheating, and fiber breaks.
- Patient risks including minor to severe adverse events such as thermal injury and, rarely, fatal complications.
- Procedure cancellations more frequent with certain pulse modulation settings.
Patient & Prescribing Data
Patients undergoing urologic laser procedures including lithotripsy and prostate treatments
TFL devices post-FDA recall demonstrate improved safety profiles with fewer patient harms; Ho: YAG lasers remain effective but have higher device malfunction rates.
Clinical Best Practices
- Adhere to manufacturer power presets and updated safety protocols, especially for TFL devices.
- Employ pulse modulation techniques judiciously to minimize fiber breakage and procedure cancellations.
- Classify and grade adverse events using standardized systems (e.g., Gupta classification) for consistent reporting and management.
- Incorporate MAUDE database findings into clinical decision-making to enhance patient safety.
References