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Valleylab LigaSure Vessel Sealing System (Diathermy)

Valleylab Ligasure Features

The Valleylab LigaSure vessel sealing system gives you something no other electrosurgical tool can, permanent vessel occlusion. The Valleylab LigaSure system’s revolutionary technology replaces almost all other hemostatic tools because it doesn’t just ligate vessels, it actually fuses vessel walls to create a permanent seal.

  • Provides a combination of pressure and energy to create vessel fusion
  • Permanently fuses vessels up to and including 7 mm in diameter and tissue bundles without dissection or isolation
  • Average seal cycle is 2 to 4 seconds
  • Seals withstand 3 times normal systolic blood pressure
  • Feedback-controlled response system automatically discontinues energy delivery when the seal cycle is complete, eliminating the guesswork

Valleylab Ligasure Specifications


  • Height: 5” (12.7 cm)
  • Width: 15.2” (38.6 cm)
  • Depth: 16” (40.6 cm)
  • Weight: 13 lbs (5.9 kg)


  • Output Configuration: Isolated output
  • Cooling: Natural convection
  • Display: Two (2) digital seven-segment displays: 1.9 cm (0.75 in.) each
  • Mounting: A Valleylab cart (UC8009) or a stable flat surface

Operating Parameters

  • Ambient Temperature Range: 10° to 40° C (50° to 104° F)
  • Relative Humidity: 15% to 90%, noncondensing
  • Atmospheric pressure: 700 to 1060 millibars
  • Warm-up Time: If transported or stored at temperatures outside the operating temperature range, allow one hour for the generator to reach room temperature before using

Audio Volume

The stated audio level is for the activation tone and alarm tone at a distance of one meter. Alarm tones meet the requirements of IEC 60601-2-2

Activation Tone

  • Volume (adjustable): 45 dB minimum
  • Frequency (nominal): Seal Mode – 440 Hz; Macrobipolar Mode – 520 Hz; Bipolar Mode – 660 Hz
  • Duration Continuous while the generator is activated; changes to one short tone when seal cycle is complete

Alarm Tone

  • Volume (not adjustable): 65 dB minimum
  • Frequency: 985 Hz to 780 Hz; 985 Hz nominal

Output Waveform

  • Macrobipolar/Bipolar: 473 kHz sinusoid, 100% duty cycle
  • Seal: 473 kHz sinusoid, pulsed

Frequency Leakage

Low Frequency (50-60 Hz)

Source current, patient leads, all outputs

  • Normal polarity, intact ground: < 10 μA
  • Normal polarity, ground open: < 50 μA
  • Reverse polarity, ground open: < 50 μA
  • Sink current at high line, all inputs: < 20 μA

High Frequency (RF)

  • Bipolar: < 69 mArms

Service Manual


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