Polymeric fiber sensors for insertion forces and trajectory determination of cochlear implants in hearing preservation

Gunawardena, Dinusha Serandi; Cui, Jingxian; Cheng, Xin; Vadivelu, Arvind N; Mohammadi, Alireza; Edbert, Geraldi; Liu, Zhengyong; Chen, Bernard; Oetomo, Denny; O’Leary, Stephen; Tam, Hwa Yaw

doi:10.1016/j.bios.2022.114866

Cited by 5 publications

(4 citation statements)

References 54 publications

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“…Custom EAs have also been designed that incorporate strain gauges, 10 scanning electrochemical microscopy, 11 a fibre‐optic imaging probe, 12 or an electromagnetic sensor 13 for position sensing. Polymer optical fibre Bragg gratings have also recently been integrated into an experimental EA to detect forces and insertion trajectories 14 . Other promising shape sensing technologies could be integrated into an EA in the future such as ref.…”

Section: Introductionmentioning

confidence: 99%

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Towards inferring positioning of straight cochlear‐implant electrode arrays during insertion using real‐time impedance sensing

Riojas,

Bruns,

Granna

et al. 2024

Robotics Computer Surgery

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BackgroundCochlear‐implant electrode arrays (EAs) are currently inserted with limited feedback, and impedance sensing has recently shown promise for EA localisation.MethodsWe investigate the use of impedance sensing to infer the progression of an EA during insertion.ResultsWe show that the access resistance component of bipolar impedance sensing can detect when a straight EA reaches key anatomical locations in a plastic cochlea and when each electrode contact enters/exits the cochlea. We also demonstrate that dual‐sided electrode contacts can provide useful proximity information and show the real‐time relationship between impedance and wall proximity in a cadaveric cochlea for the first time.ConclusionThe access resistance component of bipolar impedance sensing has high potential for estimating positioning information of EAs relative to anatomy during insertion. Main limitations of this work include using saline as a surrogate for human perilymph in ex vivo models and using only one type of EA.

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Section: Introductionmentioning

confidence: 99%

“…Polymer optical fibre Bragg gratings have also recently been integrated into an experimental EA to detect forces and insertion trajectories. 14 Other promising shape sensing technologies could be integrated into an EA in the future such as ref. [15].…”

mentioning

confidence: 99%

Towards inferring positioning of straight cochlear‐implant electrode arrays during insertion using real‐time impedance sensing

Riojas,

Bruns,

Granna

et al. 2024

Robotics Computer Surgery

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“…However, the cause of cochlear injury and the precise placement of the EA in the cochlea remain the two major challenges for surgeons during EA implantation. The current procedure for cochlear implantation does not provide feedback on the contact force between the EA and the delicate wall of the cochlea nor does it provide information on the position of the EA during insertion [4]. This study incorporates the optical frequency domain reflectometry (OFDR) sensing technology in EA insertion procedure to facilitate accurate demonstration of EA location, thereby enhance the acquisition of crucial information regarding the EA's interaction with the cochlear environment.…”

Section: Introductionmentioning

confidence: 99%

OFDR-based navigation system for minimally invasive cochlear implantation

Cui,

Leong,

et al. 2024

Specialty Optical Fibres VIII

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Cochlear implantation surgery is the only available treatment to restore hearing for individuals afflicted with severe to profound sensorineural hearing impairment. This procedure involves the precise insertion of a cochlear electrode array (EA), within constrained anatomical spaces with bending radii as minimal as 2 mm. During the insertion of EAs, surgeons primarily face two challenges: the potential for cochlear damage and the ideal positioning of the EA within the cochlear pathway. Although the use of EAs fitted with fiber Bragg grating sensors has shown successful real-time force monitoring, its effectiveness for precise placement is hindered by its low spatial resolution, making accurate EA positioning acquisition difficult. This study investigates the use of an optical frequency domain reflectometry (OFDR) sensing system, which has a spatial resolution of 0.65 mm to aid in the precise positioning of EAs during insertion. We demonstrate that by using OFDR sensing technology, a bare single-mode silica optical fiber with cladding and coating diameters of 50 µm and 105 µm , respectively, could be used to pinpoint the exact location of an EA. The frequency shift response along the fiber length correlates with the bending radius of the CI model, underscoring the potential of OFDR sensing technology to assist in EA positioning during cochlear implantation surgery.

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“…Axial force measurements and control are of great importance in numerous industrial fields, nanoparticle interactions and human health monitoring [1][2][3][4]. A variety of axial force sensors have been proposed recently and can be divided into two categories: forcemeasuring platforms and installed miniature force sensors [5,6].…”

Section: Introductionmentioning

confidence: 99%

An Axial Force Sensor Based on a Long-Period Fiber Grating with Dual-Peak Resonance

Luo,

Wang,

Ling

et al. 2023

Photonics

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A high-sensitivity axial force sensor with a large measurement range based on a dual-peak long-period fiber grating (LPFG) is proposed and experimentally demonstrated. Previously, the relationship between the grating period and the dual-peak wavelengths has been investigated based on the coupled-mode theory. In our experiment, the LPFG was fabricated in our laboratory by illuminating the fiber core with the aid of a 213 nm UV laser. The sensitivity of the proposed axial force sensor can reach −14.047 nm/N in the force range from 0.490 N to 4.508 N. Taking the advantages of a compact size, low cost, and large measurement range, our force sensor has more applicable abilities in harsh environments.

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Polymeric fiber sensors for insertion forces and trajectory determination of cochlear implants in hearing preservation

Cited by 5 publications

References 54 publications

Towards inferring positioning of straight cochlear‐implant electrode arrays during insertion using real‐time impedance sensing

Towards inferring positioning of straight cochlear‐implant electrode arrays during insertion using real‐time impedance sensing

OFDR-based navigation system for minimally invasive cochlear implantation

An Axial Force Sensor Based on a Long-Period Fiber Grating with Dual-Peak Resonance

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