Masimo Root® with Next Generation SedLine Brain Function Monitoring

A More Complete Picture Starts with More Complete Data

Root® with Next Generation SedLine Brain Function Monitoring, available for adult and paediatric patients (one year old and above), helps clinicians monitor the state of the brain under anaesthesia with bilateral data acquisition and processing of electroencephalogram (EEG) signals.

Improved Patient State Index (PSi)

Next Generation SedLine features an enhanced signal processing engine which provides an enhanced Patient State Index (PSi), a processed EEG parameter related to the effect of anaesthetic agents.

Reducing Electromyography (EMG) Susceptibility

EMG is a common confounding factor that can interfere with EEG signals used in brain function monitoring.2 Researchers have found that EMG interference existed in up to 38% of monitored patients.3 Next Generation SedLine utilises Masimo’s Parallel Signal Processing Engines to extract a clearer EEG signal and compute a processed EEG parameter (PSi) less influenced by EMG.

Improved PSi Performance in Low-Power EEG

Power across all frequency bands decreases with age.4 Low power can present a challenge for conventional brain function monitors.2

Improved PSi Performance in Low-Power EEG


When computing PSi, Next Generation SedLine uses adaptive signal processing with band-independent features to search for EEG features across many frequency bands and offer improved PSi performance in cases of low power EEG.

Multitaper Density Spectral Array (DSA)


Next Generation SedLine offers clinicians the flexibility of choosing to display either an enhanced Multitaper Density Spectral Array (DSA) or a standard Hanning DSA. The DSA contains left and right spectrograms representing the power of the EEG on both sides of the brain.

When using a Multitaper DSA, EEG data are transformed into the frequency domain, which may provide a better display of EEG features.

The Next Generation SedLine module easily plugs into the Root patient monitoring platform via Masimo Open Connect® (MOC-9®) ports. Root’s customisable, easily-interpretable display offers multiple views of brain monitoring information, expanding visibility in the operating theater and intensive care unit.

Next Generation SedLine can be used simultaneously with O3® Regional Oximetry on the Root platform for a more complete picture of the brain.

RD SedLine™ EEG Sensor



  • Four active EEG leads collect data in the frontal lobe
  • Soft foam pads for comfortable application on a patient’s forehead
  • Adhesive anchors ensure secure sensor placement for optimal signal quality
  • Pre-filled gel electrodes help streamline sensor application workflows
  • Application graphics for O3 regional oximetry sensor placement simplify simultaneous application of both monitoring technologies