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Elucidating the mechanisms of microbubble formation in intracardiac pulsed field ablation [Elektronski vir]Mahnič-Kalamiza, Samo ...Delivery of electrical energy for sensing or therapeutic purposes often involves electrochemical phenomena at the electrode-electrolyte solution interface. Release of gaseous bubbles that accompanies ... delivery of pulsed electric fields to tissues in applications such as electrochemotherapy of tumours and irreversible electroporation or pulsed field ablation in cardiac electrophysiology needs to be understood and characterized. We present an in vitro study using pulsed field delivery into saline, employing multiple different treatment protocols, two electrode geometries (pair of needles and a modified RF catheter), and two imaging systems to elucidate the complex relationship between the electrical treatment protocol, temperature changes at and around the electrodes, and gas release due to pulse delivery. Our primary objective was to identify the key parameters responsible for bubble formation and to highlight the importance of the treatment parameters and their interplay – ranging from the temperature to appropriate choice of electrode geometry, and, most importantly, to the choice of the treatment protocol. We found that bubbles originating from electrochemical reactions are more prevalent in monophasic pulsing protocols, whereas in high frequency biphasic pulsing protocols the bubbles are mainly caused by boiling of the medium. Degassing of liquid due to lower solubility of gasses at elevated temperatures does seems to play a role, though a minor one. We also observed that bubbles caused by boiling collapse very rapidly, whereas electrochemically produced bubbles or those produced through degassing appear to have longer lifetimes. Therefore, the treatment protocols most suited to minimizing gas release are biphasic trains of short (▫$\mu$▫s) pulses with a significant inter-pulse delay (i.e. low duty cycle) to prevent excessive heating. Moreover, electrodes must be designed to avoid high local current densities. Our findings have broad implications extending from lab-on-achip cell electroporation devices to intracorporeal pulsed field applications in the cardiovascular system, particularly pulsed field ablation procedures.Vir: Electrochimica acta [Elektronski vir]. - ISSN 1873-3859 (Vol. 497, [article no.] 144550, 1 Sep. 2024, 12 str.)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2024Jezik - angleškiCOBISS.SI-ID - 200309251
Avtor
Mahnič-Kalamiza, Samo |
Miklavčič, Damijan |
Lombergar, Peter |
Mikuž, Blaž, fizika, 1983- |
Mattison, Lars M. |
Sigg, Daniel C. |
Kos, Bor
Teme
ablacija s pulznim električnim poljem |
sproščanje plina |
elektrokemija |
Joulovo segrevanje |
fazni prehod vode |
pulsed field ablation |
gas release |
electrochemistry |
Joule heating |
water phase transition
Avtor | Mahnič-Kalamiza, Samo ... |
Naslov | Elucidating the mechanisms of microbubble formation in intracardiac pulsed field ablation [Elektronski vir] |
Datum objave | 2024-06-01 |
COBISS.SI-ID | 200309251 |
Verzija objave v repozitoriju | Založnikova različica |
Licenca objave v repozitoriju | Creative Commons Priznanje avtorstva 4.0 Mednarodna |
Embargo | Ni določeno |
Projekti, iz katerih je bila financirana objava
Naziv | Akronim | Številka projekta | Financer |
---|---|---|---|
Elektroporacija v biologiji, biotehnologiji in medicini | P2-0249-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Reaktorska tehnika | P2-0026-2020 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
Datoteke, ki spadajo k objavi
Povezava |
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https://www.sciencedirect.com/science/article/pii/S0013468624007904 |
https://repozitorij.uni-lj.si/IzpisGradiva.php?id=159176 |
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Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Mahnič-Kalamiza, Samo | 34298 |
Miklavčič, Damijan | 10268 |
Lombergar, Peter | 54985 |
Mikuž, Blaž, fizika, 1983- | 34279 |
Mattison, Lars M. | |
Sigg, Daniel C. | |
Kos, Bor | 30687 |
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