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Feasibility study on a short-pulsed IR wavelength for effective calculus fragmentation

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Abstract

Laser-induced lithotripsy has been used for a minimally-invasive surgery to treat kidney-stone disease associated with urinary obstruction. A short-pulsed Tm:YAG laser (λ = 2.01 µm) was developed to improve fragmentation efficiency and was evaluated with a Ho:YAG laser (λ = 2.12 μm) as to its ablation feature and mass removal rate. Application of a train of sub-microsecond pulses with a lower energy at a frequency of 500 Hz created multiple events of cavitation that accompanied strong acoustic transients. During Tm:YAG irradiation, both high light absorption and secondary photomechanical impacts readily fragmented the calculus into small pieces (< 3 mm) and removed them 130 times faster than photothermal Ho:YAG lithotripsy. The proposed short-pulsed Tm:YAG approach may be an effective lithotripter for treating calculus disease.

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Authors and Affiliations

  1. Department of Biomedical Engineering and Center for Marine-integrated Biomedical Technology, Pukyong National University, Busan, 608-737, Korea

    Hyun Wook Kang

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  1. Hyun Wook Kang
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Correspondence to Hyun Wook Kang.

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Kang, H.W. Feasibility study on a short-pulsed IR wavelength for effective calculus fragmentation. Journal of the Korean Physical Society 66, 1623–1626 (2015). https://doi.org/10.3938/jkps.66.1623

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  • DOI: https://doi.org/10.3938/jkps.66.1623

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