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- W1992629800 abstract "Laser angioplasty continues to attract interest as a potential method for treatingatherosclerotic arterial disease. Current efforts are aimed at finding the most effectivecombination of laser and delivery system. High energy pulsed ultraviolet or infrared lasersdemonstrate good photoablative properties but there remain practical difficulties with theoptical fibre delivery. Continuous wave lasers are widely used in conjunction with hot-tipfibres for thermal ablation but their direct (optical) ablation efficiency is low, causingsignificant surrounding thermal damage in soft tissue. While considerable attention has beendirected previously at the ablative effects for different laser wavelengths, little systematicstudy has been made of the efficacy for different temporal rates of energy deposition.We have compared the efficacy for tissue ablation in cadaveric human aorta of three differentlaser systems with similar wavelengths in the visible (green) but different temporal rates ofenergy deposition. The laser sources were the continuous wave argon ion laser (514.5 nm), thehigh pulse energy, frequency doubled Nd:YAG laser (532 nm) and the copper vapour laser. Thecopper vapour laser is a high repetition rate, high average power, pulsed laser emitting in thegreen (511 nm) and yellow (578 nm) which has temporal characteristics intermediate betweenthose of the Nd:YAG laser and the argon ion laser, and has the potential to be effective bothfor direct optical ablation and hot-tip thermal ablation." @default.
- W1992629800 created "2016-06-24" @default.
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- W1992629800 date "1990-06-01" @default.
- W1992629800 modified "2023-09-23" @default.
- W1992629800 title "Ablation of atheroma by laser energy: a comparative study of the efficacy of different temporal rates of energy deposition" @default.
- W1992629800 doi "https://doi.org/10.1117/12.17621" @default.
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