4.6 Article

Intra-tracheal multiplexed sensing of contact pressure and perfusion

Journal

BIOMEDICAL OPTICS EXPRESS
Volume 13, Issue 1, Pages 48-64

Publisher

OPTICAL SOC AMER
DOI: 10.1364/BOE.442165

Keywords

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Funding

  1. National Institute for Health Research [II-LA-0813-20008]
  2. Medical Research Council [MR/T025638/1]
  3. University of Nottingham
  4. National Institutes of Health Research (NIHR) [II-LA-0813-20008] Funding Source: National Institutes of Health Research (NIHR)
  5. MRC [MR/T025638/1] Funding Source: UKRI

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This study describes the development of a smart endotracheal tube (ETT) that can measure contact pressure and blood perfusion at the cuff-trachea interface. Testing on a porcine model during mechanical ventilation shows that the device can accurately obtain relevant data, and blood occlusion caused by over-inflation of the cuff can be observed.
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. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

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