ValleyLab Force EZ Electrosurgical Generator

Instant Response™ Technology
Instant Response™ technology provides surgeons with improved performance at lower power settings, minimizing the risk of tissue damage and neuromuscular stimulation, and decreasing the need to “turn up the generator.”

A Smoother Cut Through All Tissue Types
The Force EZ generator adjusts automatically, responding to tissue changes, maintaining power delivery, and minimizing drag.

Added Safety and Reliability Minimizes Electrosurgical Risks
Capacitive coupling is reduced by 30-50% when using Instant Response™ technology. This reduction is achieved by limiting the RMS voltage and the high frequency harmonics. Lower voltage means less neuromuscular stimulation and more precise delivery of energy to reduce collateral damage.

What is Instant Response™ Technology?
Instant Response™ technology features an advanced feedback system that recognizes changes in tissue 200 times per second, and adjusts voltage and current accordingly to maintain appropriate power. This unique capability differentiates Instant Response™ generators from any other, as shown by their high power efficiency rating (PER). That’s smart™ generator technology.

PER indicates the ability of a generator to accurately deliver the selected power into a wide range of tissue types. With a PER of 98, the Force EZ generator provides a consistent surgical effect.

Instant Response™ Technology provides consistent power through different tissue types.
The Force EZ generator provides surgeons with the advantage of accurately delivering the selected power setting, even through resistant tissue. The power curve below illustrates the Force EZ generator’s consistent output.

When a conventional generator encounters tissue changes, both power delivery and cutting efficiency are reduced. This means that higher power settings are required in order to cut through all types of tissue. With higher pwer setting, more energy is delivered and tissue damaging increases.

FEATURES

• Instant Response™ technology ensures that the power delivered remains virtually constant, regardless of the tissue type
• Improved performance at lower power settings minimizes the risk of tissue damage and neuromuscular stimulation
• Three internal microcontrollers reduce system reaction time and increase the system’s processing speed
• Easy to use, cost effective system when performance is required and price is of equal concern
• A Power Efficiency Rating (PER) of approximately 98 for accurate and consistent cut performance
• Two cut modes, both controlled by Instant Response technology, offer surgeons a variety of choices
  - Pure Cut for a clean, precise cut
  - Blend for cutting with hemostatsis
• Two primary coag modes
  - Low for lower voltage contact coagulation suitable in laparoscopic and delicate tissue work
  - High for efficient noncontact coagulation in most applications
• Standard bipolar mode
  - Standard mode is controlled by Instant Response technology and utilizes low voltage to prevent sparking
• Versatile system that is uniquely compatible with other devices, including:
  - Force Argon™ II and Force GSU™ argon coagulation system
  - OptiMumm™ smoke evacuator, through a direct cable link
• Separate monopolar and bipolar footswitch connectors on rear panel for easy set up
• Convenient design for boom applications
  - Additional front mounted footswitch connector is switchable, allowing monopolar or bipolar activation from a monopolar footswitch

* Trademark of Smith & Nephew

TECHNICAL SPECIFICATIONS (110-120V)

Output Waveforms

Bipolar: 470 kHz sinusoid

Monopolar Cut
Pure: 393 kHz sinusoid
Blend: 393 kHz bursts of sinusoid, recurring at 27 kHz intervals. 50% duty cycle envelope.

Monopolar Coag
Desiccate:

• Low 1: 240 +/- 40 kHz sinusoid recurring at 39 kHz. 8% duty cycle
• Low 2: 393 kHz sinusoid
• Low 3: 393 kHz sinusoid

Fulgurate:

• High 1: 470 +/- 40 kHz damped sinusoidal bursts with a repetition frequency of 57 kHz
• High 2: 470 +/- 40 kHz damped sinusoidal bursts with a repetition frequency of 30 kHz

Output power changes by less than 15% or 5 watts, whichever is greater, as the line voltage varies from 90-135 volts (into a 300 ohm load).

Low Frequency Leakage (50-60 Hz)
Source current, patient leads, all outputs tied together

• Normal polarity, intact chassis ground: <10 µA
• Normal polarity, ground open: < 50 µA
• Reverse polarity, ground open: < 50 µA
• Sink current, 140V applied, all inputs: < 50 µA

Power Readouts

Agree with actual power into rated load to within +/- 15% or 5 watts, whichever is greater. Dosage error monitor

PER = 97

PER (Power Efficiency Rating) is the measure of an electrosurgical generator’s ability to accurately deliver the selected power into a wide range of tissue types.

Weight and Dimensions

• Height: 12.7 cm (5 in.)
• Width: 40.6 cm (16 in.)
• Length: 39.5 cm (15.6 in.)
• Weight: < 6.8 kg (15 lbs)

Input Power Requirements

110-120Vac:

• Operating Range: 85-140Vac
• Max Current Cut: 8A
• Max Current Coag: 4.2

220-240Vac:

• Operating Range: 170-280Vac
• Max Current Cut: 4A
• Max Current Coag: 2.1A

High Frequency Leakage

• Bipolar: Less than 60 mA (rms)
• Monopolar: Less than 150 mA (rms)

REM™ Contact Quality Monitoring System

Measurement Frequency: 80 kHz ± 10 kHz

Measurement Current: Less than 10 µA

Acceptable Resistance Ranges:

• REM™ pad – 5-135 ohms
• Non-REM™ pad – less than 20 ohms
• Acceptance range is 5-135 ohms after REM PolyHesive II return electrode is applied

Acceptance range is 5-135 ohms after REM PolyHesive II return electrode is applied.

Adaptive REM™

REM™ trip is baseline impedance plus 40%. For example, if the baseline impedance is 30 ohms, the upper level trip approximately 42 ohms. If the pad-patient impedance falls below the baseline impedance, a new baseline is established.

OUTPUT CHARACTERISTICS

Bipolar - Standard Mode:
Maximum P-P Voltage: 300
Rated Load (OHMS): 100
Maximum Power (Watts): 70
Crest Factor* (Typical): 1.5

Monopolar Cut - Pure Mode:
Maximum P-P Voltage: 2000
Rated Load (OHMS): 300
Maximum Power (Watts): 300
Crest Factor* (Typical): 2.1

Monopolar Cut - Blend Mode:
Maximum P-P Voltage: 3400
Rated Load (OHMS): 300
Maximum Power (Watts): 200
Crest Factor* (Typical): 2.1

Monopolar Coag - Desiccate Low 1 Mode:
Maximum P-P Voltage: 3500
Rated Load (OHMS): 500
Maximum Power (Watts): 120
Crest Factor* (Typical): 5.0

Monopolar Coag - Desiccate Low 2 Mode:
Maximum P-P Voltage: 660
Rated Load (OHMS): 300
Maximum Power (Watts): 120
Crest Factor* (Typical): 1.5

Monopolar Coag - Desiccate Low 3 Mode:
Maximum P-P Voltage: 1100
Rated Load (OHMS): 300
Maximum Power (Watts): 120
Crest Factor* (Typical): 1.5

Monopolar Coag - Fulgurate High 1 Mode:
Maximum P-P Voltage: 6200
Rated Load (OHMS): 500
Maximum Power (Watts): 120
Crest Factor* (Typical): 5.0

Monopolar Coag - Fulgurate High 2 Mode:
Maximum P-P Voltage: 8500
Rated Load (OHMS): 500
Maximum Power (Watts): 120
Crest Factor* (Typical): 7.0