A wireless power transfer system for leadless endovascular electrocorticography.
| Title: | A wireless power transfer system for leadless endovascular electrocorticography. |
|---|---|
| Authors: | Xu Z; School of Biomedical Engineering, The University of Sydney, Darlington, NSW, Australia.; Truong ND; School of Biomedical Engineering, The University of Sydney, Darlington, NSW, Australia.; BrainConnect Pty Ltd, Darlington, NSW, Australia.; Ahnood A; School of Engineering, RMIT University, Melbourne, VIC, Australia.; Nikpour A; School of Biomedical Engineering, The University of Sydney, Darlington, NSW, Australia.; Neurology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia.; Kavehei O; School of Biomedical Engineering, The University of Sydney, Darlington, NSW, Australia. omid.kavehei@sydney.edu.au.; BrainConnect Pty Ltd, Darlington, NSW, Australia. omid.kavehei@sydney.edu.au. |
| Source: | Communications engineering [Commun Eng] 2026 Mar 06; Vol. 5 (1). Date of Electronic Publication: 2026 Mar 06. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Springer Nature Country of Publication: England NLM ID: 9918523382506676 Publication Model: Electronic Cited Medium: Internet ISSN: 2731-3395 (Electronic) Linking ISSN: 27313395 NLM ISO Abbreviation: Commun Eng Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: [London] : Springer Nature, [2022]- |
| Abstract: | Wireless power transfer (WPT) for stent-based neuroprosthetic devices, such as endovascular electrocorticography (endoECoG) systems, is typically constrained by the need for long lead wires to subcutaneous chest implants. This study presents a method for delivering power directly to an unmodified medical stent. The proposed system employs a subcutaneous relay that converts inductive coupling to capacitive coupling, thereby improving power transfer efficiency, reducing invasiveness, and mitigating instability in skin-contact capacitance. Experimental validation using skin, bone, and vessel tissues, combined with finite element simulations, demonstrated over 45 mW of delivered power, sufficient for endoECoG and biosignal sensing. The proposed system achieved 7.26% DC-to-DC efficiency, the highest reported for stent-based implants without custom stents or auxiliary transceivers. Measured results closely matched simulations, validating the experiment results. Safety assessments, including specific absorption rate and thermal analysis, confirmed compliance with regulatory limits. While the experimental results indicate robust performance, further theoretical analysis is required to establish a complete mechanistic understanding of the underlying coupling processes. The proposed architecture enables efficient, safe, and fully wireless power delivery to endovascular implants without requiring close skin contact, supporting long-term implantation, enhancing patient comfort, and facilitating future clinical translation.; (© 2026. The Author(s).) |
| Competing Interests: | Competing interests: The authors declare no competing interests. |
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| Grant Information: | DP230100019 Department of Education and Training | Australian Research Council (ARC) |
| Entry Date(s): | Date Created: 20260306 Date Completed: 20260416 Latest Revision: 20260419 |
| Update Code: | 20260419 |
| PubMed Central ID: | PMC13087226 |
| DOI: | 10.1038/s44172-026-00617-4 |
| PMID: | 41792254 |
| Database: | MEDLINE |
Journal Article