New and Unique Features of the MECTA Σigma ECT Device

The MECTA Σigma is the fifth generation ECT device produced by the MECTA Corporation. The MECTA Σigma incorporates a host of novel features that enhance the delivery and safety of ECT. It also retains a set of features from the previous MECTA spECTrum model that are unique among ECT devices. These features make the MECTA Σigma device remarkably simple to use. The interface for controlling the MECTA Σigma is completely new and aids in simplifying device usage.

Download the MECTA Σigma Overview Brochure

  • Stimulus Delivery
  • Physiological Monitoring
  • Display, Recording and Documentation
  • New Safety Features

New and Intuitive Interface

All interactions with the MECTA Σigma use a new high resolution, color LCD Touchscreen (7 inch diagonal; 384,000 pixels). Brightness can be easily adjusted. The LCD Touchscreen can display up to seven physiological traces, as well as graphical and numerical assessment of static impedance, stimulus parameter set and knob mode, and stimulus parameter settings.

A novel and intuitive interface makes parameter selection and device configuration fast and simple, without confusing and buried menus. The Menu Screen is the hub of the device, as any of nine menus can be accessed via the Menu Screen, as shown below. The MECTA Σigma also incorporates intuitive short-cuts for accessing specific Menu Screens.


is the center of operations and provides the interface for administering the treatment. This screen displays treatment parameter settings, patient impedance, and up to seven physiological monitoring traces.


affords ready access to the full set of parameter options and allows selection of four different parameter ranges and either One or Four Knob Mode.


selects and configures up to seven continuous physiological monitoring traces for display on the Home screen. Trace configurations include two to four EEG, one ECG, one EMG, and one Optical Motion Sensor (OMS) channel.


configures up to four physiological monitoring traces for printing, and turns the Chart Recorder On or Off.


activates impedance testing of all monitoring leads, continuously updating the values on the screen. Used to ensure adequate patient conductivity for each lead to avoid data loss.


retains trace data and treatment results from the last successful and earlier problematic stimulations so that data can be preserved and reprinted.


presents selectable choices for setting device defaults, customizing user interface controls, and printing reports.


allows the user to set the date and time, with multiple options for the date format.


offers the user basic information about the MECTA Σigma and how to contact MECTA.

Dosing and Treatment Options, 100 Joule and 200 Joule

The MECTA Σigma offers two modes for parameter selection. In One Knob Mode, the Intensity of the stimulus is algorithmically increased by changing any knob, with automatic adjustment of the individual parameters. In Four Knob Mode, the practitioner can adjust each of the four parameters (Pulse Width, Frequency, Duration and Current) independently. The choice of mode involves simply touching an icon on the Parameters Settings Screen. Within each Mode, 4 different parameter sets can be selected: Ultrabrief, Near Ultrabrief, Brief Pulse, and Full Range.

The MECTA Σigma comes configured as either a 100 Joule or 200 Joule device. The maximal output of the 100 Joule device is 576 mC (at 800 mA). The maximal output of the 200 Joules device is 1,152 mC (at 800 mA).

Download the MECTA Σigma Stimulus Dosing Data Sheet (100 Joule) OR the MECTA Σigma Stimulus Dosing Data Sheet (200 Joule) to learn more about your respective device.

Comparison of the MECTA Σigma and other ECT Devices

The MECTA Σigma replaces the earlier MECTA spECTrum ECT devices which have been used by thousands of practitioners world-wide. Whereas the spECTrum devices offered either One Knob operation (4000M, 5000M) or Four Knob operation (4000Q, 5000Q), the MECTA Σigma offers both modes in one device. The MECTA Σigma has more advanced safety features and physiological monitoring capabilities compared to the spECTrum devices. The MECTA Σigma has new high resolution LCD Touchscreen and Chart Recorder, with a new intuitive user interface, making device operation more streamlined.

Download the MECTA Σigma Comparative Data Sheet

spECTrum device info