28 June 2000 Infrared laser-tissue interaction during transmyocardial laser revascularization
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Abstract
Transmyocardial laser revascularization was found to be a new way how to convey oxygen-rich blood directly from the left ventricular cavity to the myocardium. In our study, a comparison has been made of the interaction of mid-IR solid state laser radiation with a myocardium tissue. For this purpose, the CTH:YAG, Tm:YAG and Er:YAG laser systems were designed, constructed and used for the interaction experiments. Besides those mid-IR lasers, the commercially produced CO2 laser was used for the comparative study. The ablation coefficients were measured to be 0.029 mm/J for CTH:YAG laser radiation; 0.061 mm/J for Tm:YAG; 0.75 mm/J for CO2, and 10.5 mm/J for Er:YAG. From the histological examination follows that only the channels ablated by Er:YAG laser radiation are without any thermal damage of the surrounding tissue and with the minimal mechanical injury. As a conclusion - Er:YAG laser could be considered as a good candidate for the TMR besides CO2 laser.
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Helena Jelinkova, Alexandr Jancarek, Miroslav Vrbova, Vaclav Kubecek, Daniel Dvoracek, G. Kuhnova, Jan Sulc, Pavel Cerny, Michal Nemec, Jan Kvasnicka, Milan R. Kokta, "Infrared laser-tissue interaction during transmyocardial laser revascularization", Proc. SPIE 4166, Laser Florence '99: A Window on the Laser Medicine World, (28 June 2000); doi: 10.1117/12.389509; https://doi.org/10.1117/12.389509
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