Evaluation: Nox T3 Home Sleep Testing Kit

March 27, 2019 | Evaluations & Guidance


  • The T3 is an ambulatory device used to record physiologic signals during sleep. The data is downloaded to a computer, where it is analyzed to determine whether the patient has sleep apnea.
  • System components: a) Body-worn ambulatory sleep recorder
    • Memory: 1 GB of internal memory, which can store up to 24 hours of data
    • Size: 7.9 × 6.3 × 2.1 cm (3.1 × 2.5 × 0.8 in)
    • Weight: 112 g (3.95 oz) with battery
    • Internal sensors:
      • Microphone for monitoring snoring
      • Accelerometer for monitoring patient position and for actigraphy
      • Light sensor for measuring ambient light
    • Input channels:
      • Pressure channel for recording pressure via nasal cannula (flow is derived)
      • Two respiratory effort channels for recording thoracic and abdominal effort via RIP belts (flow can also be derived from these channels)
      • Bluetooth module to wirelessly connect to pulse oximeter assembly
      • Two bipolar channels for recording of electrocardiography (ECG), electromyography (EMG), electroencephalography (EEG), or electrooculography (EOG)
    • Mini USB connector for connecting to a PC for configuring the recorder and downloading recorded data
    • One AA battery
    • LCD to provide limited instructions to the patient, as well as several indicators, including recording status, recording time, battery level, and status of sensors (if configured to display sensor status)
    • LED to indicate recorder status:
      • Blinking green indicates that a recording is in progress and the device is functioning normally.
      • Blinking orange indicates a low battery.
    • Buttons
      • Forward and back buttons for navigating screens on the display
      • Power button to turn the recorder on, wake up the display during a study, and manually start and stop recording

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