Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery

D. Theisen-Kunde; Veit Danicke; Ralf Brinkmann

doi:10.1007/978-3-642-03906-5_36

Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery

D. Theisen-Kunde^*, Veit Danicke, Ralf Brinkmann

^*Corresponding author for this work

Abstract

For ablation of soft tissue by laser radiation water is the main absorptive chromophore in the tissue. In this study the absorption coefficient of water at different temperatures was investigated for wavelengths at 1920 nm and 2013 nm respectively. The laser radiation was transmitted via a quartz fiber (Ø 600μm) in to a thermal isolated and heated water filled cuvette. At different temperatures the transmittance of water was measured for both wavelengths. According to Beer-Lambert's law the absorption coefficient α was calculated. At 2013 nm absorption coefficient ? of water decreases from 64.9±0.3/cm² @ 20°C to 49.7±1.2/cm² @ 80°C, while at 1920 nm α increases from 126.4±1.6/cm ² @ 20°C to 142.5±1.6/cm² @ 80°C. Histological evaluation of liver tissue showed ablated channel depth about 800 μm for 1920nm and 1700 μm for 2013 nm. Thermal damage zone was 600-770 μm for 1920 nm and 830-1380 μm for 2013 nm. For small and precise dissection of soft tissue by laser radiation in the 2 μm range the wavelength at 1920 nm should be preferred.

Original language	English
Title of host publication	World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany
Editors	Olaf Dössel, Wolfgang C. Schlegel
Number of pages	4
Volume	25
Place of Publication	Berlin, Heidelberg
Publisher	Springer Vieweg, Berlin Heidelberg
Publication date	2009
Edition	6
Pages	132-135
ISBN (Print)	978-3-642-03905-8
ISBN (Electronic)	978-3-642-03906-5
DOIs	https://doi.org/10.1007/978-3-642-03906-5_36
Publication status	Published - 2009
Event	World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging - Munich , Germany Duration: 07.09.2009 → 12.09.2009 Conference number: 81644

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Academic Focus: Biomedical Engineering

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10.1007/978-3-642-03906-5_36

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Theisen-Kunde, D., Danicke, V., & Brinkmann, R. (2009). Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery. In O. Dössel, & W. C. Schlegel (Eds.), World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany (6 ed., Vol. 25, pp. 132-135). (IFMBE Proceedings; Vol. 25, No. 6). Springer Vieweg, Berlin Heidelberg. https://doi.org/10.1007/978-3-642-03906-5_36

Theisen-Kunde, D. ; Danicke, Veit ; Brinkmann, Ralf. / Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery. World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. editor / Olaf Dössel ; Wolfgang C. Schlegel. Vol. 25 6. ed. Berlin, Heidelberg : Springer Vieweg, Berlin Heidelberg, 2009. pp. 132-135 (IFMBE Proceedings; 6).

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title = "Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery",

abstract = "For ablation of soft tissue by laser radiation water is the main absorptive chromophore in the tissue. In this study the absorption coefficient of water at different temperatures was investigated for wavelengths at 1920 nm and 2013 nm respectively. The laser radiation was transmitted via a quartz fiber ({\O} 600μm) in to a thermal isolated and heated water filled cuvette. At different temperatures the transmittance of water was measured for both wavelengths. According to Beer-Lambert's law the absorption coefficient α was calculated. At 2013 nm absorption coefficient ? of water decreases from 64.9±0.3/cm2 @ 20°C to 49.7±1.2/cm2 @ 80°C, while at 1920 nm α increases from 126.4±1.6/cm 2 @ 20°C to 142.5±1.6/cm2 @ 80°C. Histological evaluation of liver tissue showed ablated channel depth about 800 μm for 1920nm and 1700 μm for 2013 nm. Thermal damage zone was 600-770 μm for 1920 nm and 830-1380 μm for 2013 nm. For small and precise dissection of soft tissue by laser radiation in the 2 μm range the wavelength at 1920 nm should be preferred.",

author = "D. Theisen-Kunde and Veit Danicke and Ralf Brinkmann",

note = "Copyright: Copyright 2021 Elsevier B.V., All rights reserved.; World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging ; Conference date: 07-09-2009 Through 12-09-2009",

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Theisen-Kunde, D , Danicke, V & Brinkmann, R 2009, Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery. in O Dössel & W C. Schlegel (eds), World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. 6 edn, vol. 25, IFMBE Proceedings, no. 6, vol. 25, Springer Vieweg, Berlin Heidelberg, Berlin, Heidelberg, pp. 132-135, World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging, Munich , Bavaria, Germany, 07.09.09. https://doi.org/10.1007/978-3-642-03906-5_36

Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery. / Theisen-Kunde, D.; Danicke, Veit ; Brinkmann, Ralf.
World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. ed. / Olaf Dössel; Wolfgang C. Schlegel. Vol. 25 6. ed. Berlin, Heidelberg: Springer Vieweg, Berlin Heidelberg, 2009. p. 132-135 (IFMBE Proceedings; Vol. 25, No. 6).

Research output: Chapters in Books/Reports/Conference Proceedings › Conference contribution › peer-review

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AU - Danicke, Veit

AU - Brinkmann, Ralf

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N2 - For ablation of soft tissue by laser radiation water is the main absorptive chromophore in the tissue. In this study the absorption coefficient of water at different temperatures was investigated for wavelengths at 1920 nm and 2013 nm respectively. The laser radiation was transmitted via a quartz fiber (Ø 600μm) in to a thermal isolated and heated water filled cuvette. At different temperatures the transmittance of water was measured for both wavelengths. According to Beer-Lambert's law the absorption coefficient α was calculated. At 2013 nm absorption coefficient ? of water decreases from 64.9±0.3/cm2 @ 20°C to 49.7±1.2/cm2 @ 80°C, while at 1920 nm α increases from 126.4±1.6/cm 2 @ 20°C to 142.5±1.6/cm2 @ 80°C. Histological evaluation of liver tissue showed ablated channel depth about 800 μm for 1920nm and 1700 μm for 2013 nm. Thermal damage zone was 600-770 μm for 1920 nm and 830-1380 μm for 2013 nm. For small and precise dissection of soft tissue by laser radiation in the 2 μm range the wavelength at 1920 nm should be preferred.

AB - For ablation of soft tissue by laser radiation water is the main absorptive chromophore in the tissue. In this study the absorption coefficient of water at different temperatures was investigated for wavelengths at 1920 nm and 2013 nm respectively. The laser radiation was transmitted via a quartz fiber (Ø 600μm) in to a thermal isolated and heated water filled cuvette. At different temperatures the transmittance of water was measured for both wavelengths. According to Beer-Lambert's law the absorption coefficient α was calculated. At 2013 nm absorption coefficient ? of water decreases from 64.9±0.3/cm2 @ 20°C to 49.7±1.2/cm2 @ 80°C, while at 1920 nm α increases from 126.4±1.6/cm 2 @ 20°C to 142.5±1.6/cm2 @ 80°C. Histological evaluation of liver tissue showed ablated channel depth about 800 μm for 1920nm and 1700 μm for 2013 nm. Thermal damage zone was 600-770 μm for 1920 nm and 830-1380 μm for 2013 nm. For small and precise dissection of soft tissue by laser radiation in the 2 μm range the wavelength at 1920 nm should be preferred.

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Theisen-Kunde D , Danicke V , Brinkmann R. Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery. In Dössel O, C. Schlegel W, editors, World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. 6 ed. Vol. 25. Berlin, Heidelberg: Springer Vieweg, Berlin Heidelberg. 2009. p. 132-135. (IFMBE Proceedings; 6). doi: 10.1007/978-3-642-03906-5_36

Comparison of two cw infrared laser systems emitting wavelengths at 1.92 μm and 2.01 μm for tissue dissection in liver surgery

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