Assessing renal tissue temperature changes and perfusion effects during laser activation in an in vivo porcine model

Marom, Ron; Dau, Julie J.; Ghani, Khurshid R.; Hall, Timothy L.; Roberts, William W.

doi:10.1007/s00345-024-04896-4

World J Urol

2024

DOI: 10.1007/s00345-024-04896-4

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Assessing renal tissue temperature changes and perfusion effects during laser activation in an in vivo porcine model

Ron Marom,

Julie J. Dau,

Khurshid R. Ghani

et al.

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2024

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Cited by 2 publications

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Steady-state versus burst lasing techniques for thulium fiber laser

Sierra,

Solano,

Corrales

et al. 2024

World J Urol

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Objective To evaluate the stone ablation rate and direct thermal damage from thulium fiber laser (TFL) lithotripsy using continuous (C) and burst (B) lasing techniques on an in vitro ureteral model. Methods The TFL Drive (Coloplast, Humlebaek, Denmark) was used in an in vitro saline-submerged ureteral model. Ten participants, including five junior and five experienced urologists, conducted the experimental setup with 7 different settings comparing two lasing techniques: steady-state lasing (0.5 J/10 Hz = 5W for 300 s and 0.5 J/20 Hz = 10W for 150 s) and burst, intermittent 5 s on/off lasing (0.5 J/20 Hz, 0.5 J/30 Hz, 0.5 J/60 Hz, 0.1 J/200 Hz, and 0.05 J/400 Hz) with a target cumulative energy of 1500 J using cubic 125 mm3 phantom BegoStonesTM. Ureteral damage was graded 1–3 based on the severity of burns and holes observed on the surface of the ureteral model. Results The were no significant differences in stone ablation mass neither between C and B lasing techniques, nor between expertise levels. At C lasing technique had only mild ureteral lesions with no significant differences between expertise levels (p: 0.97) or laser settings (p: 0.71). At B lasing technique, different types of thermal lesions were found with no expertise (p: 0.11) or setting (p: 0.83) differences. However, B laser setting had higher grade direct thermal lesions than C (p: 0.048). Conclusion Regarding efficacy, C and B lasing techniques achieve comparable stone ablation rates. Safety-wise, B lasing mode showed higher grade of direct thermal lesions. These results should be further investigated to verify which of the lasing mode is the safest in vivo. Until then and unless proven otherwise, a C mode with low frequency should be recommended to avoid ureteral wall lesions.

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Steady-state versus burst lasing techniques for thulium fiber laser

Sierra,

Solano,

Corrales

et al. 2024

World J Urol

View full text Add to dashboard Cite

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Pourquoi l’hyperthermie devient un danger quotidien en endourologie ?

Sebaa,

Mahjoub,

Hoznek

2024

Progrès en Urologie - FMC

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Assessing renal tissue temperature changes and perfusion effects during laser activation in an in vivo porcine model

Cited by 2 publications

References 18 publications

Steady-state versus burst lasing techniques for thulium fiber laser

Steady-state versus burst lasing techniques for thulium fiber laser

Pourquoi l’hyperthermie devient un danger quotidien en endourologie ?

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