Dependence of laser-induced tissue ablation on optical fiber movements for laser prostatectomy. Academic Article uri icon

Overview

abstract

  • PURPOSE: The aim of the current study was to identify the efficient fiber movements for 532-nm laser prostatectomy. MATERIALS AND METHODS: 532-nm Lithium triborate (LBO) laser light was tested on 120 kidney tissues at three different translational speeds (TS 1, 2, and 4 mm/s) and four different rotational speeds (RS 0.5, 1.0, 1.6, and 2.1 rad/s). The applied power was 120 W at a 2-mm working distance and 60° sweeping angle. Ablation rate and dimensions of resulting ablation craters were measured. RESULTS: Slower TSs and RSs created deeper and wider ablation craters with thinner coagulation, leading to more efficient ablation performance. Maximal ablation rate was achieved at a TS of 2 mm/s and RSs of 0.5 and 1.0 rad/s. An RS of 0.5 rad/s accompanied surface carbonization for all the TSs. Irrespective of TS, ablation rate became saturated at faster RSs than 1.0 rad/s. Faster TSs or RSs reduced tissue ablation, but increased thermal coagulation due to a shorter interaction time. CONCLUSIONS: Optimal ablation efficiency occurred at a TS of 2 mm/s and a RS of 1.0 rad/s with a thin coagulation of around 1.0 mm and no or minimal carbonization. Further studies will validate the current findings with prostate tissue and high-power levels for laser prostatectomy.

publication date

  • November 21, 2019

Research

keywords

  • Borates
  • Laser Therapy
  • Lithium Compounds
  • Optical Fibers
  • Prostatectomy

Identity

Scopus Document Identifier

  • 85075368253

Digital Object Identifier (DOI)

  • 10.1007/s00345-019-03019-8

PubMed ID

  • 31754772

Additional Document Info

volume

  • 38

issue

  • 9