Contact Laser Lithotripsy Using Strongly Heated Distal Tip of Optic Fiber

Streltsova, Olga; Grebenkin, E.V.; Pochtin, D.P.; Bredikhin, V. I.; Kamensky, Vladislav A.

doi:10.17691/stm2017.9.4.17

Cited by 3 publications

(4 citation statements)

References 7 publications

(8 reference statements)

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“…It was shown that use of laser with SAC¯ber tip provided the break of a stone without small fragments. 5 In addition, high working temperature of ber tip may lead to bacteria death.…”

Section: Discussionmentioning

confidence: 99%

“…26 Currently, a technique of renal calculus lithotripsy using a diode laser with SAC at the¯ber tip is being developed. 5 This technique allows us to break stones up into parts with controlling size. The current paper shows that a diode laser with a SAC Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The use of laser with SAC¯ber tip provided the break of a stone along the marked line and excluded small stone fragmentation. 5 The SAC ber tip had working temperature at 2000 K. It is suggested that this technique may have bactericidal e®ect due to high temperature. Laser with SAC ber tip in liquid is known to create directional jet°o ws, which, besides being of high temperature, contain vapor bubbles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip

Elagin

Smirnov

Yusupov

et al. 2018

J. Innov. Opt. Health Sci.

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The bactericidal effect of laser radiation with a quartz fiber-based transmission system with a strong absorption coating converter against bacteria associated with urological stones has been studied. Gram-negative rod Escherichia coli and the Gram-positive coccus Staphylococcus epidermidis, Staphylococcus aureus, Enterococcus faecalis and Enterococcus faecium were used in this study. Each bacterial species was treated by continuous-wave near infrared laser coupled with bare fiber tip or strongly absorption coating fiber tip. After treatment, the temperature of bacterial suspension was measured. In addition, the temperature distribution was analyzed. It has been shown that using laser with a strongly absorption coating fiber tip results in significant bactericidal effect. The decrease of the amount of E. coli and S. epidermidis was 100% after treatment with an output power of 6[Formula: see text]W of radiation at a wavelength of 0.97[Formula: see text][Formula: see text]m for 40[Formula: see text]s. Number of S. aureus and Ent. faecium colony-forming unit was reduced to 70% after same exposure. The peak temperature of bacterial suspension was [Formula: see text]C after treatment by laser with a strongly absorption coating fiber tip. Laser with a strongly absorption coating fiber tip provides large-scale hydrodynamic flows directed away from the fiber tip. The laser with a strongly absorption coating fiber tip has bactericidal effect. The main role is associated with the effect of high temperature, which, in the form of flow in a liquid medium, affects bacteria.

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“…It was shown that use of laser with SAC¯ber tip provided the break of a stone without small fragments. 5 In addition, high working temperature of ber tip may lead to bacteria death.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip

Elagin

Smirnov

Yusupov

et al. 2018

J. Innov. Opt. Health Sci.

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show abstract

“…The "hot-spot" laser lithotripsy technique can reduce the scattering of stone fragments and affect pathogenic microorganisms in the contact zone due to the high temperature [16,17].…”

Section: Introductionmentioning

confidence: 99%

Diode Laser Lithotription Technique Based on Optothermal Converter

et al. 2021

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Purpose: evaluation of the efficiency of the “hot spot” method for the fragmentation of urinary stones. Materials and methods: A retrospective analysis of clinical records of 1666 patients with urolithiasis who underwent percutaneous nephrolithoextraction/tripsy and contact ureterolithotripsy/extraction in the period from 2014 to 2017 at the urology clinic was performed to assess the incidence of postoperative infectious and inflammatory complications. The research objects were postoperative urinary stones (n-78). The X-ray density and linear dimensions of the stones were determined. Stone fragmentation was performed with a continuous-wave diode laser operating at wavelengths of 0.81 μm, 0.97 μm, and 1.47 μm. An absorbing coating of micro-size graphite powder was applied on the working tip of the optical fiber. In vitro fragmentation was carried out in liquid. Results: A group of patients (224/1666) (13.4 ± 0.86%) was identified, who developed infectious and inflammatory complications after: percutaneous nephrolithotripsy, 123/361 (34.1 ± 2.5%) cases; percutaneous nephrolithoextraction, 59/240 (24.6 ± 2.78%); contact ureterolithotripsy, 23/294 (7.8 ± 1.57%); and ureterolithoextraction, 19/771 (2.5 ± 0.56%). In liquid, the “hot spot” technique made it possible to fragment stones with an X-ray density of up to 1000 HU at a laser wavelength of 0.81 µm, up to 1400 HU at 0.97 µm, and up to 1400 HU at 1.47 µm.

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Optothermal properties of a converter of laser radiation to the radiation of a high-temperature point source

Bredikhin

2019

Mater. Res. Express

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Contact Laser Lithotripsy Using Strongly Heated Distal Tip of Optic Fiber

Cited by 3 publications

References 7 publications

The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip

The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip

Diode Laser Lithotription Technique Based on Optothermal Converter

Optothermal properties of a converter of laser radiation to the radiation of a high-temperature point source

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