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Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study

The differences in dynamic thermal changes during laser lithotripsy between various laser pulse modes are unclear. We used thermography to evaluate the temporal changes in high-temperature areas during laser activation in order to compare different laser pulse modes. An unroofed artificial kidney mo...

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Autores principales: Yamashita, Shimpei, Inoue, Takaaki, Imai, Satoshi, Maruyama, Yohei, Iwahashi, Yuya, Deguchi, Ryusuke, Kohjimoto, Yasuo, Fujisawa, Masato, Hara, Isao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9961509/
https://www.ncbi.nlm.nih.gov/pubmed/36835944
http://dx.doi.org/10.3390/jcm12041409
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author Yamashita, Shimpei
Inoue, Takaaki
Imai, Satoshi
Maruyama, Yohei
Iwahashi, Yuya
Deguchi, Ryusuke
Kohjimoto, Yasuo
Fujisawa, Masato
Hara, Isao
author_facet Yamashita, Shimpei
Inoue, Takaaki
Imai, Satoshi
Maruyama, Yohei
Iwahashi, Yuya
Deguchi, Ryusuke
Kohjimoto, Yasuo
Fujisawa, Masato
Hara, Isao
author_sort Yamashita, Shimpei
collection PubMed
description The differences in dynamic thermal changes during laser lithotripsy between various laser pulse modes are unclear. We used thermography to evaluate the temporal changes in high-temperature areas during laser activation in order to compare different laser pulse modes. An unroofed artificial kidney model was used for the experiments. The laser fired for 60 s with a laser setting of 0.4 J/60 Hz in the following four different laser pulse modes without saline irrigation: short pulse mode (SPM), long pulse mode (LPM), virtual basket mode (VBM) and Moses mode (MM). Using the first 30 s of moving images, we compared the ratio of a high-temperature area of >43 °C to the total area every 5 seconds. The dynamic changes in fluid temperatures were shown to be different between the laser pulse modes. The extent of the high-temperature areas during the laser activation was large in the LPM and MM compared with the SPM and VBM. While the high-temperature areas expanded in an anterior direction in the early laser irradiation period using the LPM, they spread in a posterior direction in the early laser activation period using the MM. Although only the temperature profile in one specific plane was investigated, these results are considered useful for preventing thermal injuries during retrograde intrarenal surgeries.
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spelling pubmed-99615092023-02-26 Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study Yamashita, Shimpei Inoue, Takaaki Imai, Satoshi Maruyama, Yohei Iwahashi, Yuya Deguchi, Ryusuke Kohjimoto, Yasuo Fujisawa, Masato Hara, Isao J Clin Med Article The differences in dynamic thermal changes during laser lithotripsy between various laser pulse modes are unclear. We used thermography to evaluate the temporal changes in high-temperature areas during laser activation in order to compare different laser pulse modes. An unroofed artificial kidney model was used for the experiments. The laser fired for 60 s with a laser setting of 0.4 J/60 Hz in the following four different laser pulse modes without saline irrigation: short pulse mode (SPM), long pulse mode (LPM), virtual basket mode (VBM) and Moses mode (MM). Using the first 30 s of moving images, we compared the ratio of a high-temperature area of >43 °C to the total area every 5 seconds. The dynamic changes in fluid temperatures were shown to be different between the laser pulse modes. The extent of the high-temperature areas during the laser activation was large in the LPM and MM compared with the SPM and VBM. While the high-temperature areas expanded in an anterior direction in the early laser irradiation period using the LPM, they spread in a posterior direction in the early laser activation period using the MM. Although only the temperature profile in one specific plane was investigated, these results are considered useful for preventing thermal injuries during retrograde intrarenal surgeries. MDPI 2023-02-10 /pmc/articles/PMC9961509/ /pubmed/36835944 http://dx.doi.org/10.3390/jcm12041409 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yamashita, Shimpei
Inoue, Takaaki
Imai, Satoshi
Maruyama, Yohei
Iwahashi, Yuya
Deguchi, Ryusuke
Kohjimoto, Yasuo
Fujisawa, Masato
Hara, Isao
Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title_full Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title_fullStr Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title_full_unstemmed Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title_short Dynamic Changes in Fluid Temperatures during Laser Irradiation Using Various Laser Modes: A Thermography-Based In Vitro Phantom Study
title_sort dynamic changes in fluid temperatures during laser irradiation using various laser modes: a thermography-based in vitro phantom study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9961509/
https://www.ncbi.nlm.nih.gov/pubmed/36835944
http://dx.doi.org/10.3390/jcm12041409
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