Endoluminal non-contact soft tissue ablation using fiber-based Er:YAG laser delivery

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dc.identifier.uri http://dx.doi.org/10.15488/2531
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2557
dc.contributor.author Kundrat, Dennis
dc.contributor.author Fuchs, Alexander
dc.contributor.author Schoob, Andreas
dc.contributor.author Kahrs, Lüder Alexander
dc.contributor.author Ortmaier, Tobias
dc.date.accessioned 2017-12-12T11:54:18Z
dc.date.available 2017-12-12T11:54:18Z
dc.date.issued 2016
dc.identifier.citation Kundrat, D.; Fuchs, A.; Schoob, A.; Kahrs, L.A.; Ortmaier, T.: Endoluminal non-contact soft tissue ablation using fiber-based Er:YAG laser delivery. In: Proceedings of SPIE 9702 (2016), 97020E. DOI: https://doi.org/10.1117/12.2211796
dc.description.abstract The introduction of Er:YAG lasers for soft and hard tissue ablation has proven promising results over the last decades due to strong absorption at 2.94 μm wavelength by water molecules. An extension to endoluminal applications demands laser delivery without mirror arms due to dimensional constraints. Therefore, fiber-based solutions are advanced to provide exible access while keeping space requirements to a minimum. Conventional fiber-based treatments aim at laser-tissue interactions in contact mode. However, this procedure is associated with disadvantages such as advancing decrease in power delivery due to particle coverage of the fiber tip, tissue carbonization, and obstructed observation of the ablation progress. The objective of this work is to overcome aforementioned limitations with a customized fiber-based module for non-contact robot-assisted endoluminal surgery and its associated experimental evaluation. Up to the authors knowledge, this approach has not been presented in the context of laser surgery at 2.94 μm wavelength. The preliminary system design is composed of a 3D Er:YAG laser processing unit enabling automatic laser to fiber coupling, a GeO2 solid core fiber, and a customized module combining collimation and focusing unit (focal length of 20 mm, outer diameter of 8 mm). The performance is evaluated with studies on tissue substitutes (agar-agar) as well as porcine samples that are analysed by optical coherence tomography measurements. Cuts (depths up to 3mm) with minimal carbonization have been achieved under adequate moistening and sample movement (1.5mms-1). Furthermore, an early cadaver study is presented. Future work aims at module miniaturization and integration into an endoluminal robot for scanning and focus adaptation. © 2016 SPIE. eng
dc.language.iso eng
dc.publisher Bellingham, WA : S P I E - International Society for Optical Engineering
dc.relation.ispartofseries Proceedings of SPIE 9702 (2016)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject endoluminal robot eng
dc.subject ER:YAG laser eng
dc.subject laser surgery eng
dc.subject laser-fiber-coupling eng
dc.subject soft tissue ablation eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Endoluminal non-contact soft tissue ablation using fiber-based Er:YAG laser delivery
dc.type article
dc.type conferenceObject
dc.type Text
dc.relation.issn 16057422
dc.relation.doi https://doi.org/10.1117/12.2211796
dc.bibliographicCitation.volume 9702
dc.bibliographicCitation.firstPage 97020E
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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