Olympus ESG-400 Electrosurgical Unit (ESU)

The Olympus ESG-400 Electrosurgical Unit is a high-performance universal HF generator designed for open, laparoscopic, and endoscopic surgical procedures. With advanced energy modes, instrument recognition, and a touchscreen interface, it delivers reliable cutting, coagulation, and bipolar performance in demanding OR settings.

Overview

The ESG-400 supports a wide variety of monopolar and bipolar procedures through intelligent tissue-adaptive output, saline-mode compatibility, and fast switching between energy types. Its compact, durable design integrates seamlessly into Olympus surgical platforms and provides access to future surgical tissue management technologies.

Key Features

• Universal HF generator supporting monopolar, bipolar, and saline modes
• Instrument recognition and plug-and-play connectivity via Olympus “UNIVERSAL” socket
• Touchscreen interface and quick memory function for efficient workflow
• “High Power Cut” mode for rapid plasma ignition and cutting start
• Saline detection and continuous plasma ignition for safe bipolar operation in conductive fluids
• Autostart / Autostop functionality and constant monitoring (current, impedance, voltage)
• Compatible with Olympus THUNDERBEAT, PK, ENDOALPHA, UHI, and advanced bipolar tools
• Automatic smoke evacuation availability when paired with compatible accessories

Product Specifications

• Power Supply: 100–120 V AC or 220–240 V AC, 50/60 Hz
• Maximum Input Power: 1,500 VA
• High-Frequency Output Frequency: ~430 kHz ± 20%
• Maximum HF Power: 320 W
• Duty Cycle: 25% in most modes; RFCoag modes support 100% duty cycle
• Sockets / Ports:
  • Monopolar: 2 × 3-pin (Ø 4 mm), 1 × 1-pin (Ø 8 mm), 1 × coaxial (5 mm / 9 mm)
  • Bipolar: 1 × 2-pin (Ø 4 mm, spacing 28.8 mm), 1 × coaxial (4 mm / 8 mm)
  • Universal 7-pin “Olympus standard” interface
  • Neutral electrode: 2-pin (single or split)
• Dimensions: 370 × 465 × 156 mm (W × D × H)
• Weight: ~12.5 kg
• Protection / Classification: Type CF, Class I (per IEC 60601-1) / Medical Device Class IIb (CE) / Complies with IEC 60601-1 and EMC standards
• Operating Conditions: 10–40 °C; 30–75% relative humidity, non-condensing; atmospheric pressure 70–106 kPa
• Storage / Transport Conditions: –25 °C to 60 °C; 10–85% humidity (non-condensing)
• Fuse: 10 A (FST-series) (IEC/EN 60127)
• Potential Equalization Terminal: Included

Ideal For

• Open, laparoscopic, and endoscopic surgeries
• Hospitals and surgical centers
• Gynecology, urology, ENT, general surgery specialties
• Settings requiring a single generator to support multiple energy modalities
• Facilities leveraging Olympus surgical platform interoperability