A new catheter design for combined radiofrequency ablation and optoacoustic treatment monitoring using copper-coated light-guides

Johannes Rebling; Francisco Javier Oyaga Landa; Xosé Luis Deán-Ben; Daniel Razansky

doi:10.1117/12.2287390

13 February 2018 A new catheter design for combined radiofrequency ablation and optoacoustic treatment monitoring using copper-coated light-guides

Johannes Rebling, Francisco Javier Oyaga Landa, Xosé Luis Deán-Ben, Daniel Razansky

Author Affiliations +

Proceedings Volume 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII; 1048805 (2018) https://doi.org/10.1117/12.2287390
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Electrosurgery, i.e. the application of radiofrequency current for tissue ablation, is a frequently used treatment for many cardiac arrhythmias. Electrophysiological and anatomic mapping, as well as careful radiofrequency power control typically guide the radiofrequency ablation procedure. Despite its widespread application, accurate monitoring of the lesion formation with sufficient spatio-temporal resolution remains challenging with the existing imaging techniques. We present a novel integrated catheter for simultaneous radiofrequency ablation and optoacoustic monitoring of the lesion formation in real time and 3D. The design combines the delivery of both electric current and optoacoustic excitation beam in a single catheter consisting of copper-coated multimode light-guides and its manufacturing is described in detail. The electrical current causes coagulation and desiccation while the excitation light is locally absorbed, generating OA responses from the entire treated volume. The combined ablation-monitoring capabilities were verified using ex-vivo bovine tissue. The formed ablation lesions showed a homogenous coagulation while the ablation was monitored in realtime with a volumetric frame rate of 10 Hz over 150 seconds.

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Citation Download Citation

Johannes Rebling, Francisco Javier Oyaga Landa, Xosé Luis Deán-Ben, and Daniel Razansky "A new catheter design for combined radiofrequency ablation and optoacoustic treatment monitoring using copper-coated light-guides", Proc. SPIE 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII, 1048805 (13 February 2018); https://doi.org/10.1117/12.2287390

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