Erbium: YAG laser Lithotripsy Mechanism

Chan, Kin Foong; Lee, H.O.; Teichman, Joel M.H.; Kamerer, Angela; McGuff, H. Stan; Vargas, Gracie; Welch, Ashley J.

doi:10.1016/s0022-5347(05)64653-8

Cited by 38 publications

(4 citation statements)

References 16 publications

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“…Although no clinical endoscopic use of such fibers is known in surgical urology, research activities are emerging in this area. For instance, an in vitro investigation of Er : YAG laser lithotripsy using sapphire fibers has been performed, yielding very promising results that warranted further in vivo studies [45], [53], [54].…”

Section: Discussionmentioning

confidence: 99%

Free electron laser ablation of urinary calculi: an experimental study

Chan

Choi

Vargas

et al. 2001

IEEE J. Select. Topics Quantum Electron.

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Infrared laser ablation of urinary calculi was investigated as a function of wavelength to determine the relation of ablation threshold fluences, ablation depths, and optical absorption. A simple photothermal ablation model was employed to examine this relationship. Human urinary calculi composed of 95% uric acid, 95% cystine, 95% calcium oxalate monohydrate (COM), and 90% magnesium ammonium phosphate hexahydrate (MAPH) were used. Various wavelengths between 2.1 and 6.5 m were selected to perform threshold fluence and ablation depth measurements. The laser source for this study was the tunable pulsed infrared free electron laser (FEL) at Vanderbilt University. Experimental results indicated a correlation of threshold fluence and ablation depth to the optical absorption properties of the calculi. When calculus optical absorption increased, the threshold fluences decreased. Although the ablation depths increased with calculus optical absorption, results indicated that in certain calculi the ablation depth was affected by optical attenuation through the ablation plume. These observations were in agreement with the photothermal ablation model, but fractures in striated calculi at higher optical absorptions indicated the contribution of a photomechanical mechanism.

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Section: Discussionmentioning

confidence: 99%

Free electron laser ablation of urinary calculi: an experimental study

Chan

Choi

Vargas

et al. 2001

IEEE J. Select. Topics Quantum Electron.

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“…Recent reports on the potential advantages of Erbium laser over Holmium for lithotripsy in endourology [14,15] prompted us to investigate its use for sialolithiasis. According to these reports the Erbium laser is a more effective laser lithotriptor and is significantly safer to surrounding soft tissues both due to its higher absorption in water and soft tissues and to differences in the vapor bubble dynamics [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

An Er:YAG laser endoscopic fiber delivery system for lithotripsy of salivary stones

et al. 2006

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“…This is particularly critical because as new lasers are introduced in urology, a reliable stone model is required to optimize laser parameters at a given frequency. Therefore, there is a need for stone models that replicate both the mechanical and optical properties of human kidney stones to perform as phantoms for other infrared lasers such as the thulium fiber laser and the erbium:YAG laser. ,− In this work, we introduce a methodology to produce artificial kidney stones of any composition that replicate both the fragmentation behavior and absorption spectra of human stones. Such models not only can be applied to optimize lithotripsy procedures for clinical application, but also provide insight into the factors determining resilience of stones during in vivo lithotripsy.…”

mentioning

confidence: 99%

Polymer–Mineral Composites Mimic Human Kidney Stones in Laser Lithotripsy Experiments

Frank

Aldoukhi

Roberts

et al. 2019

ACS Biomater. Sci. Eng.

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Despite the widespread use of laser lithotripsy to fragment kidney stones in vivo, there is a lack of robust artificial stone models to replicate the behavior of human stones during lithotripsy procedures. This need for accurate stone models is particularly important as novel laser technologies are introduced in the field of lithotripsy. In this work, we present a method to prepare composite materials that replicate the properties of human kidney stones during laser lithotripsy. Their behavior is understood through the lens of near-IR spectroscopy and helps to elucidate the mechanism of laser lithotripsy in kidney stone materials.

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Erbium: YAG laser Lithotripsy Mechanism

Abstract: The erbium:YAG laser fragments stones through a photothermal mechanism.

Cited by 38 publications

References 16 publications

Free electron laser ablation of urinary calculi: an experimental study

Free electron laser ablation of urinary calculi: an experimental study

An Er:YAG laser endoscopic fiber delivery system for lithotripsy of salivary stones

Polymer–Mineral Composites Mimic Human Kidney Stones in Laser Lithotripsy Experiments

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