Thulium fiber laser damage to Nitinol stone baskets

Christopher R. Wilson, Luke A. Hardy, Pierce B. Irby, Nathaniel M. Fried

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Our laboratory is studying the experimental Thulium fiber laser (TFL) as an alternative lithotripter to clinical gold standard Holmium:YAG laser. Safety studies characterizing undesirable Holmium laser-induced damage to Nitinol stone baskets have been previously reported. Similarly, this study characterizes TFL induced stone basket damage. A TFL beam with pulse energy of 35 mJ, pulse duration of 500 μs, and pulse rates of 50-500 Hz was delivered through 100-μm-core optical fibers, to a standard 1.9-Fr Nitinol stone basket wire. Stone basket damage was graded as a function of pulse rate, number of pulses, and working distance. Nitinol wire damage decreased with working distance and was non-existent at distances greater than 1.0 mm. In contact mode, 500 pulses delivered at pulse rates ≥ 200 Hz (≤ 2.5 s) were sufficient to cut Nitinol wires. The Thulium fiber laser, operated in low pulse energy and high pulse rate mode, may provide a greater safety margin than standard Holmium laser for lithotripsy, as evidenced by shorter non-contact working distances for stone basket damage than previously reported with Holmium laser.

Original languageEnglish (US)
Title of host publicationPhotonic Therapeutics and Diagnostics XI
PublisherSPIE
Volume9303
ISBN (Print)9781628413939
DOIs
StatePublished - 2015
Externally publishedYes
EventPhotonic Therapeutics and Diagnostics XI - San Francisco, United States
Duration: Feb 7 2015Feb 8 2015

Other

OtherPhotonic Therapeutics and Diagnostics XI
CountryUnited States
CitySan Francisco
Period2/7/152/8/15

Fingerprint

Thulium
Holmium
baskets
Laser damage
thulium
laser damage
Solid-State Lasers
pulse rate
Fiber lasers
holmium
fiber lasers
Lasers
Heart Rate
rocks
damage
Laser pulses
Wire
wire
pulses
Laser Lithotripsy

Keywords

  • Ablation
  • Basket
  • Fragmentation
  • Lithotripsy
  • Nitinol
  • Thulium

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Wilson, C. R., Hardy, L. A., Irby, P. B., & Fried, N. M. (2015). Thulium fiber laser damage to Nitinol stone baskets. In Photonic Therapeutics and Diagnostics XI (Vol. 9303). [93031A] SPIE. https://doi.org/10.1117/12.2079374

Thulium fiber laser damage to Nitinol stone baskets. / Wilson, Christopher R.; Hardy, Luke A.; Irby, Pierce B.; Fried, Nathaniel M.

Photonic Therapeutics and Diagnostics XI. Vol. 9303 SPIE, 2015. 93031A.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wilson, CR, Hardy, LA, Irby, PB & Fried, NM 2015, Thulium fiber laser damage to Nitinol stone baskets. in Photonic Therapeutics and Diagnostics XI. vol. 9303, 93031A, SPIE, Photonic Therapeutics and Diagnostics XI, San Francisco, United States, 2/7/15. https://doi.org/10.1117/12.2079374
Wilson CR, Hardy LA, Irby PB, Fried NM. Thulium fiber laser damage to Nitinol stone baskets. In Photonic Therapeutics and Diagnostics XI. Vol. 9303. SPIE. 2015. 93031A https://doi.org/10.1117/12.2079374
Wilson, Christopher R. ; Hardy, Luke A. ; Irby, Pierce B. ; Fried, Nathaniel M. / Thulium fiber laser damage to Nitinol stone baskets. Photonic Therapeutics and Diagnostics XI. Vol. 9303 SPIE, 2015.
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