NDLI: Strength and Persistence of Energy-Based Vessel Seals Rely on Tissue Water and Glycosaminoglycan Content

Content Provider	Springer Nature Link
Author	Kramer, Eric A. Cezo, James D. Fankell, Douglas P. Taylor, Kenneth D. Rentschler, Mark E. Ferguson, Virginia L.
Copyright Year	2016
Abstract	Vessel ligation using energy-based surgical devices is steadily replacing conventional closure methods during minimally invasive and open procedures. In exploring the molecular nature of thermally-induced tissue bonds, novel applications for surgical resection and repair may be revealed. This work presents an analysis of the influence of unbound water and hydrophilic glycosaminoglycans on the formation and resilience of vascular seals via: (a) changes in pre-fusion tissue hydration, (b) the enzymatic digestion of glycosaminoglycans (GAGs) prior to fusion and (c) the rehydration of vascular seals following fusion. An 11% increase in pre-fusion unbound water led to an 84% rise in vascular seal strength. The digestion of GAGs prior to fusion led to increases of up to 82% in seal strength, while the rehydration of native and GAG-digested vascular seals decreased strengths by 41 and 44%, respectively. The effects of increased unbound water content prior to fusion combined with the effects of seal rehydration after fusion suggest that the heat-induced displacement of tissue water is a major contributor to tissue adhesion during energy-based vessel sealing. The effects of pre-fusion GAG-digestion on seal integrity indicate that GAGs are inhibitory to the bond formation process during thermal ligation. GAG digestion may allow for increased water transport and protein interaction during the fusion process, leading to the formation of stronger bonds. These findings provide insight into the physiochemical nature of the fusion bond, its potential for optimization in vascular closure and its application to novel strategies for vascular resection and repair.
Starting Page	3421
Ending Page	3431
Page Count	11
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	44
Issue Number	11
e-ISSN	15739686
Language	English
Publisher	Springer US
Publisher Date	2016-05-25
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tissue welding Collagen Denaturation Glycosaminoglycans Thermal Ligation Biomedicine Biomedical Engineering Biological and Medical Physics, Biophysics Classical Mechanics Biochemistry
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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