A multimodal optical catheter for diagnosing obstructive sleep apnea

A. J. Wall, John W. Arkwright, Karen Reynolds, Albert Ruiz-Vargas, Taher Omari, A. S. Carney, Peter Catcheside, Douglas McEvoy, Peter Eastwood

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


We present a multimodal catheter for characterizing airway collapse in obstructive sleep apnea (OSA) during in-vivo sleep studies. Traditionally, diagnosis focusses on identifying the presence of apnea rather than the underlying cause of obstruction, and current methods of detecting airway collapse are not able to identify a specific patient's contributing factors. It is considered that a simple method to establish the primary site and mechanism for upper airway collapse would improve the ability of clinicians to distinguish which patients would benefit from one of the variety of treatments currently available. By introducing a newly developed manometry catheter into in-vivo studies of known OSA sufferers we can provide the means to determine the location of the site(s) of collapse, the degree of occlusion that occurs, the severity of reduced air flow, the associated anatomical features, and mechanism of collapse. The device consists of 13 discrete pressure and temperature sensing elements and a micro-video camera that collectively enable simultaneous recording of pressure, temperature, and visualization of the point of collapse. The sensors use fiber Bragg gratings (FBGs) spaced on a 10mm pitch which is sufficient to provide an accurate interpolated image of both pressure and temperature along the upper airway (above the epiglottis), whilst the use of paired FBGs effectively removes the temperature artefact. We present results from recent in-vivo studies that demonstrate the viability of the device to identify and characterize occlusive events in the upper airway and the potential to better guide subsequent therapeutic interventions.

Original languageEnglish
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX
EditorsIsrael Gannot, Israel Gannot
ISBN (Electronic)9781510623866
Publication statusPublished - 2019
EventOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX 2019 -
Duration: 2 Feb 2019 → …

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX 2019
Period2/02/19 → …


  • Catheter
  • Fiber Bragg gratings
  • Fiber optic sensing
  • Obstructive sleep apnea
  • Optical design
  • Upper airway collapse


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