Nox T3s polygraph with sleep state indicator| ResMed

Nox T3s

Polygraph with sleep state indicator

Like its predecessor, the Nox T3s is an easy-to-use, portable sleep recorder enabling the home-based diagnosis of sleep-related breathing disorders. Thanks to Nox BodySleep, a function which is an accurate sleep state indicator and to a modernised version of the Noxturnal software, including an intuitive results overview and visualisation of the sleep states, the Nox T3s ensure accurate1 diagnostics.

Discover Nox T3s

The Nox T3s is an intuitive Home Sleep Test device that allows users to easily understand its features. Updated design, a responsive user interface and ease-of-use help make patients’ and healthcare professionals’ lives simple. Watch this video to learn more.

Nox BodySleep: the first* sleep state indicator

Nox BodySleep is an Artificial Intelligence (AI) method that classifies each 30-second time frame as a state of REM sleep, NREM sleep or wakefulness. This approach was implemented, for the most part, by extracting information from the Nox RIP belts in the Nox A1 PSG studies2.

Noxturnal: patient data management software

Noxturnal-6-software-with-sleep-physician

Noxturnal has been modernised with an interface designed to better adapt to each clinician’s specific requirements and allow even more effective management of patient data.

  • Nox BodySleep analysis improving AHI accuracy2.
  • PLM analysis updated for more precise diagnostics2.
  • Recording results overview designed to provide workflow efficiency.
  • Report parameters calculations giving the physician more data depth and report customisation flexibility.

FAQ

The Nox T3s retains all the advantages of the latest Nox T3 device, with the addition of the following enhanced features:

  • The Nox BodySleep, an accurate sleep state indicator giving an estimation of the sleep states (REM sleep, NREM sleep and wakefulness).
  • Updated version of Noxturnal software offering advanced functionalities adapted to the device features.
  • Improved design for better cleaning and efficiency.

More intuitive with a modernised interface, the Noxturnal v6 offers a wide range of additional features:

  • Nox BodySleep analysis improving AHI accuracy.
  • PLM analysis updated for more precise diagnostics.
  • Recording results overview designed to provide workflow efficiency.
  • Report parameters calculations giving the physician more data depth and report customisation flexibility.

The Nox T3s can record the following signals:

  • Thorax and abdomen RIP
  • Nasal pressure/Mask pressure
  • Snore signal
  • Audio and snoring channel
  • 2 additional bipolar channels (PLM or EKG or EMG or EEG)
  • Position, Activity
  • Light
  • SpO2, Pulse, Plethysmography.

The Nox BodySleep algorithm in the Noxturnal software can derive sleep states (REM sleep, NREM sleep and wakefulness) from the Nox T3s signals.

Nox BodySleep is an advanced method for measuring the physiologic impact of brain state changes on the body. This sleep state indicator:

  • Estimates the states of REM sleep, NREM sleep and wakefulness.
  • Is based on extracting information from the Nox RIP belts in the Nox A1 PSG studies2.
  • Provides a more efficient analysis of Sleep Disordered Breathing for accurate diagnostics.

To evaluate the reliability of the Nox BodySleep algorithm, Nox Medical used an analysis1 of 77,940 epochs of 30s in length. The comparison between epochs scored by Nox BodySleep™ 1.0 and manual scored epochs is shown in the graph below. With a Cohen’s Kappa of 0.62, they obtain a result indicating a substantial agreement between the manual scoring and the Nox BodySleep™ 1.0.

Graph 6: Comparison of the number of scored epochs via Nox BodySleep™ 1.0 versus manual scoring of 128 sleep lab patients

No, Nox BodySleep is NOT considered as a method for directly measuring brain states associated with wake and sleep but is an advanced feature estimating the different states of sleep (REM, NREM sleep and wakefulness). It may not replace PSG hypnogram-based clinical decisions.

Warranty and services

Looking for service and warranty information on ResMed Nox T3s? Find the answers to your questions in our resource centre.

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Please refer to the user guide for relevant information related to any warnings and precautions to be considered before and during use of the product.

*The first sleep state indicator using RIP and Actigraphy

References

1. Sarah Dietz-Terjung, Amelie Ricarda Martin, Eysteinn Finnsson, Jón Skínir Ágústsson, Snorri Helgason,
Halla Helgadóttir, Matthias Welsner, Christian Taube, Gerhard Weinreich, Christoph Schöbel« Proof of principle study: diagnostic accuracy of a novel algorithm for the estimation of sleep stages and disease severity in patients with sleep-disordered breathing based on actigraphy and respiratory inductance plethysmography », Sleep & Breathing, 3 Feb 2021, https://doi.org/10.1007/s11325-021-02316-0

2. Hanna Ragnarsdóttir, Heiðar Már Þráinsson, Eysteinn Finnsson, Eysteinn Gunnlaugsson, Sigurður Ægir Jónsson, Jón Skírnir Ágústsson, Halla Helgadóttir “BodySleep: Estimating sleep states from respiration and body movements”, Poster Presented at World Sleep 2019, Vancouver.

3. S Dietz-Terjung, A Martin, C Schöbel,”A Novel Algorithm for the Estimation of Sleep States Based on Breathing and Movement”, Sleep, Volume 43, Issue Supplement_1, April 2020, Page A170, https://doi.org/10.1093/sleep/zsaa056.442.