Study of Temperature Changes around Fibres in Super Pulse Thulium Fibre Laser in Vitro Lithotripsy
Urology Journal,
Vol. 20 No. 02 (2023),
27 February 2023
,
Page 96-101
https://doi.org/10.22037/uj.v20i02.7326
Abstract
Purpose: To investigate temperature changes around the fibres of the super pulse thulium fibre laser (SP-TFL) during in vitro lithotripsy.
Materials and Methods: Stones were placed in the in vitro model. The laser was continuously excited for 180 s; the probe was positioned 5 mm around the fibre; the laser power was set at 10, 15, 20, 25, and 30 W; and the irrigation rate was set at 0, 15, 25, 35 ml/min, using a domestic SP-TFL. The temperature variations around the fibre under different power settings and different irrigation rates were compared.
Results: Without irrigation, the temperature around the fibre rapidly reached the safety threshold of 43℃ at 24 s. At irrigation rate 15 ml/min and laser power <15 W, the temperature around the fibre was <43℃. Once the laser power increased to ≥20 W, the temperature around the fibre increased to >43℃ at its lowest plateau. At irrigation rate 25 ml/min and laser power ≤25 W, the temperature around the fibre was <43℃. At irrigation rate 35 ml/min and laser power <30 W, the fibre temperature was <43℃. When laser power was ≥30 W, the fibre temperature was >43℃. Conclusion: In extracorporeal ureteroscope SP-TFL lithotripsy, when the laser power is ≤15 W, ≤25 W, and ≤30 W, the irrigation rate should be maintained at ≥15 ml/min, ≥25 ml/min, and ≥35 ml/min, respectively.
- Super-pulse thulium fibre laser; temperature; lithotripsy; safety threshold
How to Cite
References
Zeng GA-O, Mai Z, Xia S, et al. Prevalence of kidney stones in China: an ultrasonography based cross-sectional study. (1464-410X (Electronic)).
Coptcoat MJ, Ison KT, Watson G, et al. Lasertripsy for ureteric stones in 120 cases: lessons learned. Br J Urol. 1988;61(6):487-9.
Fried NM, Irby PB. Advances in laser technology and fibre-optic delivery systems in lithotripsy. Nat Rev Urol. 2018;15(9):563-73.
Traxer OA-O, Keller EA-O. Thulium fiber laser: the new player for kidney stone treatment? A comparison with Holmium:YAG laser. (1433-8726 (Electronic)).
Kronenberg P, Traxer O. The laser of the future: reality and expectations about the new thulium fiber laser-a systematic review. (2223-4691 (Print)).
Rapoport LM, Gazimiev MA, Korolev DO, et al. [Flexible ureteroscopy for lower pole renal stones: novel superpulse thulium (TM) fiber laser lithotripsy]. Urologiia. 2020(6):89-92.
Teichman JMH, Qiu J, Kang W, et al. Laser Lithotripsy Physics.
Wieliczka DM, Weng S, Querry MR. Wedge shaped cell for highly absorbent liquids: infrared optical constants of water. Appl Opt. 1989;28(9):1714-9.
Ventimiglia E, Doizi S, Kovalenko A, et al. Effect of temporal pulse shape on urinary stone phantom retropulsion rate and ablation efficiency using holmium:YAG and super-pulse thulium fibre lasers. BJU Int. 2020;126(1):159-67.
Dong H, Peng Y, Li L, et al. Prevention strategies for ureteral stricture following ureteroscopic lithotripsy. Asian J Urol. 2018;5(2):94-100.
Thomsen S, Pearce JA. Thermal Damage and Rate Processes in Biologic Tissues.
Hein S, Petzold R, Schoenthaler M, et al. Thermal effects of Ho: YAG laser lithotripsy: real-time evaluation in an in vitro model. World J Urol. 2018;36(9):1469-75.
Aldoukhi AH, Ghani KR, Hall TL, et al. Thermal Response to High-Power Holmium Laser Lithotripsy. J Endourol. 2017;31(12):1308-12.
Sapareto SA, Dewey WC. Thermal dose determination in cancer therapy. Int J Radiat Oncol Biol Phys. 1984;10(6):787-800.
He X, McGee S, Coad JE, et al. Investigation of the thermal and tissue injury behaviour in microwave thermal therapy using a porcine kidney model. Int J Hyperthermia. 2004;20(6):567-93.
Cinman NM, Andonian S, Smith AD. Lasers in percutaneous renal procedures. World J Urol. 2010;28(2):135-42.
Peng Y, Liu M, Ming S, et al. Safety of a novel Thulium fiber laser for lithotripsy: an in vitro study on the thermal effect and its impact factor. J Endourol. 2020;34(1):88-92.
Taratkin M, Laukhtina E, Singla N, et al. Temperature changes during laser lithotripsy with Ho:YAG laser and novel Tm-fiber laser: a comparative in-vitro study. World Journal of Urology. 2020;38(12):3261-6.
Andreeva V, Vinarov A, Yaroslavsky IA-O, et al. Preclinical comparison of superpulse thulium fiber laser and a holmium:YAG laser for lithotripsy. (1433-8726 (Electronic)).
Taratkin MA-OX, Laukhtina E, Singla N, et al. Temperature changes during laser lithotripsy with Ho:YAG laser and novel Tm-fiber laser: a comparative in-vitro study. (1433-8726 (Electronic)).
Hardy LA, Wilson CR, Irby PB, et al. Thulium fiber laser lithotripsy in an in vitro ureter model. (1560-2281 (Electronic)).
Tokas TA-O, Herrmann TRW, Skolarikos A, et al. Pressure matters: intrarenal pressures during normal and pathological conditions, and impact of increased values to renal physiology. (1433-8726 (Electronic)).
Alsyouf M Fau - Abourbih S, Abourbih S Fau - West B, West B Fau - Hodgson H, et al. Elevated renal pelvic pressures during percutaneous nephrolithotomy risk higher postoperative pain and longer hospital stay. (1527-3792 (Electronic)).
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