Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface
Previous studies on computer modeling of RF ablation with cooledelectrodes modeled the internal cooling circuit by setting surfacetemperature at the coolant temperature (i.e., Dirichlet condition,DC). Our objective was to compare the temperature profilescomputed from different thermal boundary condi...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIMS Press
2009-05-01
|
| Series: | Mathematical Biosciences and Engineering |
| Subjects: | |
| Online Access: | https://www.aimspress.com/article/doi/10.3934/mbe.2009.6.611 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832590166922887168 |
|---|---|
| author | María J. Rivera Juan A. López Molina Macarena Trujillo Enrique J. Berjano |
| author_facet | María J. Rivera Juan A. López Molina Macarena Trujillo Enrique J. Berjano |
| author_sort | María J. Rivera |
| collection | DOAJ |
| description | Previous studies on computer modeling of RF ablation with cooledelectrodes modeled the internal cooling circuit by setting surfacetemperature at the coolant temperature (i.e., Dirichlet condition,DC). Our objective was to compare the temperature profilescomputed from different thermal boundary conditions at theelectrode-tissue interface. We built an analytical one-dimensionalmodel based on a spherical electrode. Four cases were considered:A) DC with uniform initial condition, B) DC with pre-coolingperiod, C) Boundary condition based on Newton's cooling law (NC)with uniform initial condition, and D) NC with a pre-coolingperiod. The results showed that for a long time ($120$ s), theprofiles obtained with (Cases B and D) and without (Cases A and C)considering pre-cooling are very similar. However, for shortertimes ($<30$ s), Cases A and C overestimated the temperature atpoints away from the electrode-tissue interface. In the NC cases,this overestimation was more evident for higher values of theconvective heat transfer coefficient ($h$). Finally, with NC, when$h$ was increased the temperature profiles became more similar tothose with DC. The results suggest that theoretical modeling of RFablation with cooled electrodes should consider: 1) the modelingof a pre-cooling period, especially if one is interested in thethermal profiles registered at the beginning of RF application;and 2) NC rather than DC, especially for low flow in the internalcircuit. |
| format | Article |
| id | doaj-art-14969779904a49d4bdd0bcc73282f481 |
| institution | Kabale University |
| issn | 1551-0018 |
| language | English |
| publishDate | 2009-05-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Mathematical Biosciences and Engineering |
| spelling | doaj-art-14969779904a49d4bdd0bcc73282f4812025-01-24T01:59:54ZengAIMS PressMathematical Biosciences and Engineering1551-00182009-05-016361162710.3934/mbe.2009.6.611Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interfaceMaría J. Rivera0Juan A. López Molina1Macarena Trujillo2Enrique J. Berjano3Instituto Universitario de Matemática Pura y Aplicada, Universidad Politécnica de Valencia, Camino de Vera s/n. 46022, ValenciaInstituto Universitario de Matemática Pura y Aplicada, Universidad Politécnica de Valencia, Camino de Vera s/n. 46022, ValenciaInstituto Universitario de Matemática Pura y Aplicada, Universidad Politécnica de Valencia, Camino de Vera s/n. 46022, ValenciaInstituto Universitario de Matemática Pura y Aplicada, Universidad Politécnica de Valencia, Camino de Vera s/n. 46022, ValenciaPrevious studies on computer modeling of RF ablation with cooledelectrodes modeled the internal cooling circuit by setting surfacetemperature at the coolant temperature (i.e., Dirichlet condition,DC). Our objective was to compare the temperature profilescomputed from different thermal boundary conditions at theelectrode-tissue interface. We built an analytical one-dimensionalmodel based on a spherical electrode. Four cases were considered:A) DC with uniform initial condition, B) DC with pre-coolingperiod, C) Boundary condition based on Newton's cooling law (NC)with uniform initial condition, and D) NC with a pre-coolingperiod. The results showed that for a long time ($120$ s), theprofiles obtained with (Cases B and D) and without (Cases A and C)considering pre-cooling are very similar. However, for shortertimes ($<30$ s), Cases A and C overestimated the temperature atpoints away from the electrode-tissue interface. In the NC cases,this overestimation was more evident for higher values of theconvective heat transfer coefficient ($h$). Finally, with NC, when$h$ was increased the temperature profiles became more similar tothose with DC. The results suggest that theoretical modeling of RFablation with cooled electrodes should consider: 1) the modelingof a pre-cooling period, especially if one is interested in thethermal profiles registered at the beginning of RF application;and 2) NC rather than DC, especially for low flow in the internalcircuit.https://www.aimspress.com/article/doi/10.3934/mbe.2009.6.611radiofrequency ablation.cardiac ablationcooled electrode |
| spellingShingle | María J. Rivera Juan A. López Molina Macarena Trujillo Enrique J. Berjano Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface Mathematical Biosciences and Engineering radiofrequency ablation. cardiac ablation cooled electrode |
| title | Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface |
| title_full | Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface |
| title_fullStr | Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface |
| title_full_unstemmed | Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface |
| title_short | Theoretical modeling of RF ablation with internally cooled electrodes:Comparative study of different thermal boundary conditions at theelectrode-tissue interface |
| title_sort | theoretical modeling of rf ablation with internally cooled electrodes comparative study of different thermal boundary conditions at theelectrode tissue interface |
| topic | radiofrequency ablation. cardiac ablation cooled electrode |
| url | https://www.aimspress.com/article/doi/10.3934/mbe.2009.6.611 |
| work_keys_str_mv | AT mariajrivera theoreticalmodelingofrfablationwithinternallycooledelectrodescomparativestudyofdifferentthermalboundaryconditionsattheelectrodetissueinterface AT juanalopezmolina theoreticalmodelingofrfablationwithinternallycooledelectrodescomparativestudyofdifferentthermalboundaryconditionsattheelectrodetissueinterface AT macarenatrujillo theoreticalmodelingofrfablationwithinternallycooledelectrodescomparativestudyofdifferentthermalboundaryconditionsattheelectrodetissueinterface AT enriquejberjano theoreticalmodelingofrfablationwithinternallycooledelectrodescomparativestudyofdifferentthermalboundaryconditionsattheelectrodetissueinterface |