1 March 2016 Primary investigations on the potential of a novel diode pumped Er:YAG laser system for middle ear surgery
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Abstract
Flashlamp pumped Er:YAG lasers are successfully used clinically for both precise soft and hard tissue ablation. Since several years a novel diode pumped Er:YAG laser system (Pantec Engineering AG) is available, with mean laser power up to 40 W and pulse repetition rate up to 1 kHz. The aim of the study was to investigate the suitability of the laser system specifically for stapedotomy. Firstly an experimental setup was realized with a beam focusing unit and a computer controlled translation stage to move the samples (slices of porcine bone) with a defined velocity while irradiation with various laser parameters. A microphone was positioned in a defined distance to the ablation point and the resulting acoustic signal of the ablation process was recorded. For comparison, measurements were also performed with a flash lamp pumped Er:YAG laser system. After irradiation the resulting ablation quality and efficacy were determined using light microscopy. Using a high speed camera and “Töpler-Schlierentechnik” the cavitation bubble in water after perforation of a bone slice was investigated. The results show efficient bone ablation using the diode pumped Er:YAG laser system. Also a decrease of the sound level and of the cavitation bubble volume was observed with decreasing pulse duration. Higher repetition rates lead to a slightly increase of thermal side effects but have no influence on the ablation efficiency. In conclusion, these first experiments demonstrate the high potential of the diode pumped Er:YAG laser system for use in middle ear surgery.
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Karl Stock, Karl Stock, Holger Wurm, Holger Wurm, Florian Hausladen, Florian Hausladen, "Primary investigations on the potential of a novel diode pumped Er:YAG laser system for middle ear surgery", Proc. SPIE 9689, Photonic Therapeutics and Diagnostics XII, 96892K (1 March 2016); doi: 10.1117/12.2213105; https://doi.org/10.1117/12.2213105
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