22 February 2017 Tissue dissection using a 1470-nm diode laser and laparoscopic prototype
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Abstract
A continuous-wave, 40 Watt, 1470 nm laser was explored for rapid and precise dissection of porcine mesentery fascia and liver tissues, ex vivo. Laser energy was delivered through a 550-μm-core optical fiber inside a 5-mm-OD, laparoscopic probe, with detachable, 2 mm, sapphire ball rolling tip. Fascia tissue was cleanly dissected with scanning rates from 2.0 - 4.5 mm/s using 16 - 31W. Fascia collateral thermal damage measured as low as 180 ± 50 μm at 4.5 mm/s scan speed. Porcine liver ablation crater depth measured up to 1010 ± 220 μm with 30 W at 2.0 mm/s or as shallow as 80 ± 30 μm with 10 W at 10 mm/s. Peak temperatures reached 130 °C at ball tip and 75 °C on metal jaws. The 1470-nm laser and probe show promise for laparoscopic tissue cutting and coagulation.
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Chun-Hung Chang, Chun-Hung Chang, John Hammerland, John Hammerland, William H. Nau, William H. Nau, Nathaniel M. Fried, Nathaniel M. Fried, } "Tissue dissection using a 1470-nm diode laser and laparoscopic prototype", Proc. SPIE 10066, Energy-based Treatment of Tissue and Assessment IX, 100660V (22 February 2017); doi: 10.1117/12.2250990; https://doi.org/10.1117/12.2250990
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