Avery, J orcid.org/0000-0002-4015-1802, Runciman, M, Fiani, C et al. (5 more authors) (2022) Lumen Shape Reconstruction using a Soft Robotic Balloon Catheter and Electrical Impedance Tomography. In: 2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). 2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 23-27 Oct 2022, Kyoto, Japan. IEEE , pp. 3414-3421. ISBN 978-1-6654-7928-8
Abstract
Incorrectly sized balloon catheters can lead to increased post-surgical complications, yet even with preoperative imaging, correct selection remains a challenge. With limited feedback during surgery, it is difficult to verify correct deployment. We propose the use of integrated impedance measurements and Electrical Impedance Tomography (EIT) imaging to assess the deformation of the balloon and determine the size and shape of the surrounding lumen. Previous work using single impedance measurements, or pressure data and analytical models, whilst demonstrating high sizing accuracy, have assumed a circular cross section. Here we extend these methods by adding a multitude of electrodes to detect elliptical and occluded lumen and obtain EIT images to localise deformations. Using a 14 Fr (5.3 mm) catheter as an example, numerical simulations were performed to find the optimal electrode configuration of two rings of 8 electrodes spaced 10 mm apart. The simulations predicted that the maximum detectable aspect ratio decreased from 0.9 for a 14mm balloon to 0.5 at 30mm. The sizing and ellipticity detection results were verified experimentally. A prototype robotic balloon catheter was constructed to automatically inflate a compliant balloon while simultaneously recording EIT and pressure data. Data were collected in experiments replicating stenotic vessels with an elliptical and asymmetrical profile, and the widening of a lumen during angioplasty. After calibration, the system was able to correctly localise the occlusion and detect aspect ratios of 0.75. EIT images further localised the occlusion and visualised the dilation of the lumen during balloon inflation.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Robotics, Autonomous Systems & Sensing (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Mar 2024 15:03 |
Last Modified: | 15 Mar 2024 16:52 |
Published Version: | https://ieeexplore.ieee.org/document/9981150 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/iros47612.2022.9981150 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:210317 |