Comparison of two radiofrequency-based hemostatic devices : saline-linked bipolar vs. cooled-electrode monopolar
Moll, Xavier (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)
Fondevila, Dolors (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)
García Arnas, Félix (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)
Burdío, Fernando (Hospital del Mar)
Trujillo, Macarena (Universitat Politècnica de València)
Irastorza, Ramiro M. (Universidad Tecnológica Nacional (Argentina))
Berjano, Enrique (Universitat Politècnica de València)
Andaluz Martínez, Anna (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)

Data:	2022
Descripció:	11 pàg.
Resum:	Purpose: To characterize the coagulation zones created by two radiofrequency (RF)-based hemostatic devices: one comprised an internally cooled monopolar electrode and the other comprised externally irrigated bipolar electrodes (saline-linked). Materials and methods: RF-induced coagulation zones were created on ex vivo and in vivo porcine models. Computer modeling was used to determine the RF power distribution in the saline-linked device. Results: Both external (irrigation) and internal cooling effectively prevented tissue sticking. Under ex vivo conditions in 'painting' application mode, coagulation depth increased with the applied power: 2. 8 - 5. 6 mm with the 3-mm monopolar electrode, 1. 6 - 6. 0 mm with the 5-mm monopolar electrode and 0. 6 - 3. 2 mm with the saline-linked bipolar electrodes. Under in vivo conditions and using spot applications, the 3-mm monopolar electrode created coagulation zones of similar depth to the saline-linked bipolar electrodes (around 3 mm), while the 5-mm monopolar electrode created deeper coagulations (4. 5 - 6 mm) with less incidence of popping. The presence of saline around the saline-linked bipolar electrodes meant that a significant percentage of RF power (50 - 80%) was dissipated by heating in the saline layer. Coagulation zones were histologically similar for all the tested devices. Conclusions: Both external (irrigation) and internal cooling in hemostatic RF devices effectively prevent tissue sticking and create similar coagulation zones from a histological point of view. Overall, saline-linked bipolar electrodes tend to create shallower coagulations than those created with an internally cooled monopolar electrode.
Ajuts:	Agencia Estatal de Investigación RTI2018-094357-B-C21 Agencia Estatal de Investigación RTI2018-094357-B-C22
Nota:	Altres ajuts: Agencia Nacional de Promoción Científica y Tecnológica de Argentina PICT-2020-SERIEA-00457; for Dr. Irastorza a scholarship from the Programa de Becas Externas Postdoctorales para Jóvenes Investigadores del CONICET, Argentina.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Animals ; Catheter ablation ; Cooled electrode ; Hemostatic device ; Hemostatics ; Liver surgery ; Radiofrequency ; Thermal ablation ; Saline-linked
Publicat a:	International Journal of Hyperthermia, Vol. 39 Núm. 1 (2022) , p. 1397-1407, ISSN 1464-5157

DOI: 10.1080/02656736.2022.2140840
PMID: 36351216

12 p, 3.3 MB

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