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Proceedings Paper

Combination of erbium and holmium laser radiation for tissue ablation
Author(s): Hans Surya Pratisto; Martin Frenz; Flurin Koenz; Hans Joerg Altermatt; Heinz P. Weber
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Paper Abstract

Erbium lasers emitting at 2.94 micrometers and holmium lasers emitting at 2.1 micrometers are interesting tools for cutting, drilling, smoothing and welding of water containing tissues. The high absorption coefficient of water at these wavelengths leads to their good ablation efficiency with controlled thermally altered zones around the ablation sites. Combination of pulses with both wavelengths transmitted through one fiber were used to perform incisions in soft tissue and impacts in bone disks. Histological results and scanning electron microscope evaluations reveal the strong influence of the absorption coefficient on tissue effects, especially on the ablation efficiency and the zone of thermally damaged tissue. It is demonstrated that the combination of high ablation rates and deep coagulation zones can be achieved. The results indicate that this laser system can be considered as a first step towards a multi-functional medical instrument.

Paper Details

Date Published: 7 May 1996
PDF: 6 pages
Proc. SPIE 2681, Laser-Tissue Interaction VII, (7 May 1996); doi: 10.1117/12.239574
Show Author Affiliations
Hans Surya Pratisto, Univ. Bern (Switzerland)
Martin Frenz, Univ. Bern (Switzerland)
Flurin Koenz, Univ. Bern (Switzerland)
Hans Joerg Altermatt, Univ. Bern (Switzerland)
Heinz P. Weber, Univ. Bern (Switzerland)

Published in SPIE Proceedings Vol. 2681:
Laser-Tissue Interaction VII
Steven L. Jacques, Editor(s)

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