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Listar por palabra clave "Radiofrequency ablation"

Mostrando ítems 1-20 de 47

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A clinically-oriented computer model for radiofrequency ablation of hepatic tissue with internally cooled wet electrode

Ewertowska, Elzbieta; Quesada-Diez, Rita; Radosevic, A.; Andaluz, Anna; Moll, Xavier; García Arnás, F.; Berjano, Enrique; Burdío Pinilla, Fernando; Trujillo Guillen, Macarena (Taylor & Francis, 2019)

[EN] Purpose: To improve the computer modelling of radiofrequency ablation (RFA) by internally cooled wet (ICW) electrodes with added clinically oriented features. Methods: An improved RFA computer model by ICW electrode ...
A new single-instrument technique for parenchyma division and hemostasis in liver resection: a clinical feasibility study

Burdío, Fernando; Grande, Luis; Berjano, Enrique; Martinez-Serrano, Maria; Poves, Ignasi; Burdío, José M.; Navarro, Ana; Güemes, Antonio (Elsevier, 2010-12)

[EN] The objective of this study was to evaluate the clinical feasibility of a new technique for liver resection based on a radiofrequency-assisted (485 kHz) device that has shown high performance in the animal setting ...
Analytical Model Based on a Cylindrical Geometry to Study RF Ablation with Needle-Like Internally Cooled Electrode

López Molina, Juan Antonio; Rivera Ortun, María José; Berjano Zanón, Enrique (Hindawi Publishing Corporation, 2012)

Radiofrequency (RF) ablation with internally cooled needle-like electrodes is widely used in medical techniques such as tumor ablation. The device consists of a metallic electrode with an internal liquid cooling system ...
Analytical transient-time solution for temperature in non perfused tissue during radiofrequency ablation

López Molina, Juan Antonio; Rivera Ortun, María José; Berjano Zanón, Enrique (Elsevier, 2016-10-26)

[EN] Radiofrequency ablation (RFA) with internally cooled needle-like electrodes is a technique widely used to destroy cancer cells. In a previous study we obtained the analytical solution of the biological heat equation ...
Black-box modeling to estimate tissue temperature during radiofrequency catheter cardiac ablation: feasibility study on an agar phantom model

Blasco-Giménez, Ramón; Lequerica, Juan L.; Herrero, María; Hornero, Fernando; Berjano, Enrique (IOP Publishing, 2010-04)

[EN] The aim of this work was to study linear deterministic models to predict tissue temperature during radiofrequency cardiac ablation (RFCA) by measuring magnitudes such as electrode temperature, power and impedance ...
Can electroporation previous to radiofrequency hepatic ablation enlarge thermal lesion size? A feasibility study based on theoretical modelling and in vivo experiments

Trujillo Guillen, Macarena; Castellvi, Quim; Burdío, Fernando; Sánchez Velázquez, Patricia; Ivorra, Antoni; Andaluz, Anna; Berjano, Enrique (Informa Healthcare, 2013-05)

Purpose: The aim of this study was to assess the feasibility of a hybrid ablative technique based on applying electroporation (EP) pulses just before conducting radiofrequency ablation (RFA). The rationale was that the ...
Comparison of enthalpy method and water fraction method to mathematically model water vaporization during RF ablation

Fatieieva, Yuliia; Almendárez, Pedro; Romero-Méndez, Ricardo; Berjano, Enrique; Trujillo Guillen, Macarena (Cosmos Scholars Publishing House, 2014-09)

[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 ...
Computational modeling of internally cooled wet (ICW) electrodes for radiofrequency ablation: Impact of rehydration, thermal convection and electrical conductivity

Trujillo Guillen, Macarena; Bon Corbín, José; Berjano, Enrique (Taylor & Francis, 2017)

[EN] Purpose: (1) To analyse rehydration, thermal convection and increased electrical conductivity as the three phenomena which distinguish the performance of internally cooled electrodes (IC) and internally cooled wet ...
Computational modelling of the human heart and multiscale simulation of its electrophysiological activity aimed at the treatment of cardiac arrhythmias related to ischaemia and Infarction

López Pérez, Alejandro Daniel (Universitat Politècnica de València, 2019-09-02)

[ES] Las enfermedades cardiovasculares constituyen la principal causa de morbilidad y mortalidad a nivel mundial, causando en torno a 18 millones de muertes cada año. De entre ellas, la más común es la enfermedad isquémica ...
Computational Models and Experimentation for Radiofrequency-based Ablative Techniques

González Suárez, Ana (Universitat Politècnica de València, 2014-03-14)

Las técnicas ablativas basadas en energía por radiofrecuencia (RF) se emplean con el fin de lograr un calentamiento seguro y localizado en el tejido biológico. En los últimos años ha habido un rápido crecimiento en el ...
Computer modeling and ex vivo experiments with a (saline-linked) irrigated electrode for RF-assisted heating

Arenas Puig, Francisco Javier; Pérez Martínez, Juan José; Trujillo Guillen, Macarena; Berjano Zanón, Enrique (BioMed Central, 2014-12-12)

Background Externally irrigated radiofrequency (RF) electrodes have been widely used to thermally ablate tumors in surface tissue and to thermally coagulate the transection plane during a surgical resection. As far as ...
Computer modeling and experimentation in radiofrequiency-based minimally invasive therapies

Ewertowska, Elzbieta (Universitat Politècnica de València, 2020-01-07)

[ES] La ablación por radiofrecuencia (RF) se ha convertido en una técnica ablativa importante, ampliamente utilizada en el área de las terapias mínimamente invasivas de la medicina moderna. El avance en el campo de las ...
Computer modeling for radiofrequency bipolar ablation inside ducts and vessels: Relation between pullback speed and impedance progress

Pérez, Juan J; Ewertowska, Elzbieta; Berjano, Enrique (John Wiley & Sons, 2020-11)

[EN] Background and Objectives Radiofrequency (RF)-induced ablation can be carried out inside ducts and vessels by simultaneously dragging a bipolar catheter while applying RF power. Our objective was to characterize the ...
Computer modeling of an impedance-controlled pulsing protocol for RF tumor ablation with a cooled electrode

Trujillo Guillen, Macarena; Bon Corbín, José; Rivera Ortun, María José; Burdio, Fernando; Berjano, Enrique (Taylor & Francis, 2016)

[EN] Purpose: To develop computer models to mimic the impedance-controlled pulsing protocol implemented in radiofrequency (RF) generators used for clinical practice of radiofrequency ablation (RFA), and to assess the ...
Computer modeling of radiofrequency cardiac ablation including heartbeat-induced electrode displacement

Pérez, Juan J; Nadal, Enrique; Berjano, Enrique; González Suárez, Ana (Elsevier, 2022-05)

[EN] Background: The state of the art in computer modeling of radiofrequency catheter ablation (RFCA) only considers a static situation, i.e. it ignores ablation electrode displacements induced by tissue movement due to ...
Computer modeling of radiofrequency cardiac ablation: 30 years of bioengineering research

González-Suárez, Ana; Pérez, Juan J; Irastorza, Ramiro M.; D Avila, Andre; Berjano, Enrique (Elsevier, 2022-02)

[EN] This review begins with a rationale of the importance of theoretical, mathematical and computational models for radiofrequency (RF) catheter ablation (RFCA). We then describe the historical context in which each model ...
Computer modelling of RF ablation in cortical osteoid osteoma: Assessment of the insulating effect of the reactive zone

Irastorza, Ramiro M.; Trujillo Guillen, Macarena; Martel Villagran, Jose; Berjano, Enrique (Taylor & Francis, 2016-02-10)

Purpose: The aim was to study by computer simulations the insulating role of the reactive zone surrounding a cortical osteoid osteoma (OO) in terms of electrical and thermal performance during radiofrequency ablation ...
Could it be advantageous to tune the temperature controller during radiofrequency ablation? A feasibility study using theoretical models

Alba Martínez, José; Trujillo Guillen, Macarena; Blasco Giménez, Ramón Manuel; Berjano Zanón, Enrique (Informa Healthcare, 2011-09)

Purpose: To assess whether tailoring the Kp and Ki values of a proportional-integral (PI) controller during radiofrequency (RF) cardiac ablation could be advantageous from the point of view of the dynamic behaviour of the ...
CT mapping of saline distribution after infusion of saline into the liver in an ex vivo animal model. How much tissue is actually infused in an image-guided procedure?

Burdio, Fernando; Berjano, Enrique; Milian, Olga; Grande, Luis; Poves, Ignasi; Silva, Claudio; De la Fuente, Maria Dolors; Mojal, Sergi (Elsevier, 2013)

[EN] Purpose: To track the saline during infusion with a 15 G needle into healthy pig livers at high and low infusion rates for 300 s. Methods: In each experiment, the needle was inserted into a single lobe of the liver ...
Disturbing Effect of Intra-Tissue Temperature Sensors in Pre-Clinical Experimental Studies of Radiofrequency Cardiac Ablation: A Computer-Based Modeling Study

Cuenca-Dacal, Luis; Berjano, Enrique; González-Suárez, Ana; Pérez, Juan J (MDPI AG, 2023-04-11)

[EN] Background: Preclinical studies on radiofrequency (RF) cardiac ablation (RFCA) use very small temperature sensors in specific positions in the tissue subjected to RF heating. Despite the sensors' small size, the ...