Is cellular energy monitoring more responsive to hypoxia than pulse oximetry?

Journal Article (Journal Article)

PURPOSE: Pulse oximetry is the current standard for detecting drops in arterial blood oxygen saturation (SpO2) associated with obstructive sleep apnea and hypopnea events in polysomnographic (PSG) testing. However, cellular energy monitoring (CE monitoring), a measure related to cellular hypoxia in the skin, is likely to be more responsive to inadequate breathing during sleep because during hypoxic challenge, such as occurs during apneic events, regulatory mechanisms restrict blood flow to the skin to preferentially maintain SpO2 for more vital organs. We carried out initial proof of concept testing to determine if CE monitoring has promise for being more responsive to hypoxic challenge occurring during sleep-disordered breathing (SDB) than pulse oximetry. METHODS: We assessed both CE monitoring and pulse oximetry in a series of conditions which affect oxygen supply: (1) breathing nitrogen or 100% oxygen, (2) physical exertion, and (3) studying a night of sleep in an individual known to be a loud snorer. We also present the results of a preliminary study comparing CE monitoring to pulse oximetry in eight individuals undergoing standard clinical overnight polysomnography for suspected SDB. RESULTS: CE monitoring is responsive to changes in cellular oxygen supply to the skin and detects hypoxia during SDB events that is not detected by pulse oximetry. CONCLUSION: CE monitoring is a promising tool for identifying pathology at the mild end of the SDB spectrum.

Full Text

Duke Authors

Cited Authors

  • Hatch, GM; Ashbrook, L; Prather, AA; Krystal, AD

Published Date

  • December 2020

Published In

Volume / Issue

  • 24 / 4

Start / End Page

  • 1633 - 1643

PubMed ID

  • 32458375

Pubmed Central ID

  • PMC7679291

Electronic International Standard Serial Number (EISSN)

  • 1522-1709

Digital Object Identifier (DOI)

  • 10.1007/s11325-020-02104-2


  • eng

Conference Location

  • Germany