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Four-Electrode Radiofrequency Generator (G4)

Country/Region china
Company cosmanmedical company
Categories Tens Electrode
Telephone 34985793
ICP License Issued by the Chinese Ministry
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Four-Electrode Radiofrequency Generator (G4)

The Cosman G4 radiofrequency generator independently and automatically controls up to four electrodes at once, in monopolar or bipolar mode, with thermal RF or pulsed RF (PRF) output. Multiple independent supplies and patented multi-ouptut technology. With a 12-inch touch screen, wireless remote, patient and doctor presets, electronic record keeping, automatic stagger start, automatic stimulation, your choice of a graphing or one touch” interface, and large color-coded displays, the G4 is simply the most advanced RF generator ever built.

BrochureG4 Version 3 Brochure
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The New G4 Version 3

Cosman’s new G4 Version 3 RF generator is updated with superior control options, troubleshooting features, and advanced settings to make RF procedures faster and easier. New features include:

  • Individual electrode timers, individual select buttons, and individual safety cut-offs
  • Impedance graphing to verify heating and troubleshoot setup
  • CR electrode enhancements:
    • Automatic voltage control
    • Temperature-feedback via impedance graphing
  • Graphing interface enhancements:
    • On-screen start/stop button
    • Stimulation control using on-screen in/decrement buttons, knob, or both
  • One Touch interface enhancements:
    • Manual control of Thermal and Pulsed RF using control knob
    • Stimulation control using on-screen in/decrement buttons, knob, or both
  • Stimulation:
    • Separately selectable automatic ramp speeds for sensory and motor testing
    • Numeric display of marked sensory and motor stimulation levels to facilitate record keeping
    • Fewer button presses to switch between electrodes

The G4 Version 2

Cosman’s G4 Version 2 is still available and provides excellent performance and simplified controls.


Find out how the G4 system satisfies all your RF needs with superior power, efficiency, and ease of use. Click on each item for more information:

Treat Four Sites at Once
  • Automatic and independent control of up to four electrodes at once
  • Automatic Simultaneous or Stagger Start
  • Faster Procedures
  • Monopolar and Bipolar RF
  • Thermal RF and Pulsed RF
  • U.S. Patent No. 9,008,793

Multi-Bipolar RF: Create Larger Lesions Faster
  • Create up to two bipolar RF lesions at once.
  • Bipolar heat lesions can be larger than cooled RF lesions as used in pain management.1
  • SIJ Palisade: Produce a more complete lesion zone for the treatment of Sacroiliac Joint pain in less time using fewer electrode placements.1
  • Perform bipolar RF for a fraction of the cost of cooled RF:1 Bipolar RF consumes as few as two RF cannula per procedure when used with standard autoclavable RF electrodes.

1. Cosman and Gonzalez, 2011

Full Touch Screen Operability

The G4 is the only RF generator fully operable using a 12 inch touch screen.

  • Clearly labeled buttons and helpful troubleshooting messages
  • Large color-coded displays for each reading and electrode
  • Push-button temperature adjustment during lesioning
  • Viewable from a distance:
    • Upright screen with adjustable angle
    • Use with optional wireless hand controller
  • Usage of the front-panel knob and buttons is optional

Wireless Hand Controller

The G4 generator is the only RF generator that can be controlled using a wireless hand controller.

  • All output and touch-screen functions can be controlled remotely
  • Place in a sterile bag for use during the procedure

Automation Features: Stagger Start and More

Numerous automation features reduce treatment time and improve ease of use:

  • Automatic RF Simultaneous Start
    • Activate all electrodes at once
    • Proprietary algorithms maximize heating rate
  • Automatic RF Stagger Start
    • Staggering electrode activations quickly identifies problem electrodes
    • Unique to the Cosman G4
  • Automatic Stepped RF Temperature Programs
    • Use for IDET and intradiscal RF
    • Use to set a temperature ramp rate
    • Fully customizable
  • Automatic Stimulation Ramp
    • Instantaneous or gradual rise to set level
    • Set voltage or current target
    • Distinct settings for
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