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Intra-tracheal multiplexed sensing of contact pressure and perfusion

Correia, Ricardo; Gadsby, Brett; Korposh, Sergiy; Norris, Andrew M.; Hayes-Gill, Barrie R.; Sinha, Rishie; Hardman, Jonathan G.; Gardner, David S.; Talbot, Simon; Harvey, Daniel; McGlashan, Julian; Morgan, Stephen P.

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Brett Gadsby

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Professor of Photonics Instrumentation

Andrew M. Norris

Professor of Electronic Systems and Medical Devices

Rishie Sinha

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Professor of Physiology

Simon Talbot

Daniel Harvey

Julian McGlashan


Incorrect endotracheal tube (ETT) cuff inflation pressure causes significant problems for intubated patients. The technical development and first in vivo use of a smart ETT for measurements at the cuff-trachea interface during mechanical ventilation are described. The intra-tracheal multiplexed sensing (iTraXS) ETT contains integrated optical fibre sensors to measure contact pressure and blood perfusion. The device is tested during mechanical ventilation in a porcine model (N=6). For contact pressure, signals were obtained in all 30 measurements. For perfusion, data could be obtained in all 33 measurements. In the 3 cases where the cuff was inflated to an artificially high-level, blood occlusion is observed.

Journal Article Type Article
Acceptance Date Oct 7, 2021
Online Publication Date Dec 3, 2021
Publication Date Jan 1, 2022
Deposit Date Oct 21, 2021
Publicly Available Date Dec 16, 2021
Journal Biomedical Optics Express
Electronic ISSN 2156-7085
Peer Reviewed Peer Reviewed
Volume 13
Issue 1
Pages 48-64
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