Next Generation SedLine® Brain Function Monitor

A More Complete Picture Starts with More Complete Data

Root® with Next Generation SedLine Brain Function Monitoring helps clinicians monitor the state of the brain under anesthesia with bilateral data acquisition and processing of electroencephalogram (EEG) signals.

Next Generation SedLine Features:

  • Four simultaneous channels of frontal EEG waveforms
  • An enhanced Patient State Index (PSi), a processed EEG parameter related to the effect of anesthetic agents
  • A Density Spectral Array (DSA) display, which contains left and right spectrograms representing the power of the EEG on both sides of the brain
  • An optional Multitaper DSA, which may enhance visibility of EEG features

Improved Patient State Index (PSi)


Improved PSi Performace

Masimo - Improved PSi Performance Graph

Experts found an overall 17% improvement in Next Generation PSi performance.

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

EEG experts scored the improvement in PSi performance between SedLine PSi and Next Generation SedLine PSi.1

Parallel Signal Processing Engines


EMG is a common confounding factor that can interfere with EEG signals used in brain function monitoring.2 Next Generation SedLine utilizes Masimo’s Parallel Signal Processing Engines to extract a clearer EEG signal for computing PSi.

Masimo - Parallel Signal Processing Engines

This image captures a moment when Next Generation SedLine detects EMG in the two engines depicted.

Adaptive Signal Processing with Band-Independent Features


Power across all frequency bands decreases with age.3 When computing PSi, Next Generation SedLine uses adaptive signal processing with band-independent features to search for EEG features across many frequency bands.

Masimo - Adaptive Signal Processing with Band-Independent Features

Multitaper Density Spectral Array (DSA)

Masimo - 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.

Next Generation SedLine on the Root Platform


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

Masimo - Next Generation SedLine on the Root Platform Screens

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

Masimo - OR Philips Root

RD SedLine™ EEG Sensor

Masimo - ICU SedLine Root
  • Four active EEG leads collect data in the frontal lobe
  • Soft foam pads improve patient comfort
  • Allows simultaneous application of SedLine and O3 Regional Oximetry sensors

Next Generation SedLine Solutions


Explore the Root Platform and Brain Monitoring Sensors & Cables


  1. 1.

    Retrospective analysis of clinical data on file. 

  2. 2.

    Purdon P et al. Brit J of Anaesth. 10.1093 46-57. 

  3. 3.

    Lobo, Francisco A., and Stefan Schraag. Limitations of anaesthesia depth monitoring. Current Opinion in Anesthesiology. 24, no. 6 (2011): 657-664.



Masimo - Brochure, Next Generation SedLine


Masimo - Product Information, Root with SedLine Brain Function Monitoring

Product Information

Masimo - Brochure Perioperative Care Solutions
Masimo - Product Information RD SedLine Sensor

Product Information

Masimo - Quick Reference Guide SedLine

Quick Reference

Masimo - SedLine Dr. Mathews video


Caution: Federal (USA) law restricts this device to sale by or on the order of a physician. See instructions for use for full prescribing information, including indications, contraindications, warnings, and precautions.