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Proceedings Paper

Tissue dissection using a 1470-nm diode laser and laparoscopic prototype
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Paper 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.

Paper Details

Date Published: 22 February 2017
PDF: 5 pages
Proc. SPIE 10066, Energy-based Treatment of Tissue and Assessment IX, 100660V (22 February 2017); doi: 10.1117/12.2250990
Show Author Affiliations
Chun-Hung Chang, The Univ. of North Carolina at Charlotte (United States)
John Hammerland, Medtronic Covidien Group (United States)
William H. Nau, Medtronic Covidien Group (United States)
Nathaniel M. Fried, The Univ. of North Carolina at Charlotte (United States)

Published in SPIE Proceedings Vol. 10066:
Energy-based Treatment of Tissue and Assessment IX
Thomas P. Ryan, Editor(s)

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