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Comparison of enthalpy method and water fraction method to mathematically model water vaporization during RF ablation

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Comparison of enthalpy method and water fraction method to mathematically model water vaporization during RF ablation

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dc.contributor.author Fatieieva, Yuliia es_ES
dc.contributor.author Almendárez, Pedro es_ES
dc.contributor.author Romero-Méndez, Ricardo es_ES
dc.contributor.author Berjano, Enrique es_ES
dc.contributor.author Trujillo Guillen, Macarena es_ES
dc.date.accessioned 2017-07-14T14:35:08Z
dc.date.available 2017-07-14T14:35:08Z
dc.date.issued 2014-09
dc.identifier.issn 2409-3394
dc.identifier.uri http://hdl.handle.net/10251/85168
dc.description.abstract [EN] During high-temperature energy-based therapies such as radiofrequency ablation (RFA) the target tissue reaches temperatures around 100ºC, which causes tissue dehydration by water vaporization. In order to be as realistic as possible, RFA theoretical models should include the formulation of these phenomena. There are currently two fixed mesh methods of modeling the electrical and thermal effects produced by water vaporization: the enthalpy method and the water fraction method. Our objective was to compare both methods, especially to assess the thermal and electrical performance in terms of electrical impedance progress during heating, distributions of temperature, and temperature progress at some specific locations. The results showed the performance of both methods to be qualitatively analogous, with similar impedance progress, temperature distributions and temperature progress. They were hence equally able to mimic the thermal and electrical performance in a pulsed protocol, i.e. during the period without applying RF power. The main difference between the methods was the time at which impedance started to rise. All these findings suggest that the two methods offer equivalent results in RFA modeling. However, since the enthalpy method has one less problem to be solved (dynamic volume fraction of liquid water in the tissue) it is less complex, has a lower computational cost and therefore seems to be more suitable for modeling RFA with dry or internally cooled electrodes, i.e. those in which there is no interstitial saline infusion. However, the water fraction method would be more appropriate in the case of RFA with externally irrigated electrodes. es_ES
dc.description.sponsorship This work received financial support from the Spanish “Plan Nacional de I+D+I del Ministerio de Ciencia e Innovación” Grant No. TEC2011-27133-C02-01.
dc.language Inglés es_ES
dc.publisher Cosmos Scholars Publishing House es_ES
dc.relation MICINN/TEC2011-27133-C02-01 es_ES
dc.relation.ispartof Journal of Advances in Biomedical Engineering and Technology es_ES
dc.rights Reconocimiento - No comercial (by-nc) es_ES
dc.subject Enthalpy method es_ES
dc.subject Mathematical modeling es_ES
dc.subject Radiofrequency ablation es_ES
dc.subject Tissue dehydration es_ES
dc.subject Water vaporization es_ES
dc.subject.classification MATEMATICA APLICADA es_ES
dc.subject.classification TECNOLOGIA ELECTRONICA es_ES
dc.title Comparison of enthalpy method and water fraction method to mathematically model water vaporization during RF ablation es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.15379/2409-3394.2014.01.01.2
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario de Matemática Pura y Aplicada - Institut Universitari de Matemàtica Pura i Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada es_ES
dc.description.bibliographicCitation Fatieieva, Y.; Almendárez, P.; Romero-Méndez, R.; Berjano, E.; Trujillo Guillen, M. (2014). Comparison of enthalpy method and water fraction method to mathematically model water vaporization during RF ablation. Journal of Advances in Biomedical Engineering and Technology. 1(1):8-14. doi:10.15379/2409-3394.2014.01.01.2 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.15379/2409-3394.2014.01.01.2 es_ES
dc.description.upvformatpinicio 8 es_ES
dc.description.upvformatpfin 14 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 1 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 276474 es_ES
dc.contributor.funder Ministerio de Ciencia e Innovación (MICINN)


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