SOLID STATE ELECTROSURGICAL UNIT

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SOLID STATE ELECTROSURGICAL UNIT

• MAHMOUD M.ZIAD ABU-JBARA
• 200310411

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OUTLINE

• INTRODUCTION
• DESCRIPTION
• DEVICE DESCRIPTION
• MAINTENANCE
• MADICAL APPLICATION

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INTRODUCTION

• The electrosurgery machine produces high
  radiofrequency energy sufficient to induce
  cutting and/or coagulation in body tissues by an
  electrode during (electro) surgery
• Although RF Electrosurgery is reportedly used in
  over 70 of all medical procedures performed each
  year, it remains one of the least understood
  devices in the operating room

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DESCRIPTION

• This is multipurpose Electrosurgical unit,
  ideally suitable for cutting and coagulation with
  a high degree of Precision. It is a small,
  compact light weight unit and easy to handle. Our
  patient safety, the patient is protect by a
  sentry circuit that cuts off out put
  automatically also the patient output circuit is
  isolated from the power circuit.

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DEVICE Description

• An electrosurgical unit for producing a modulated
  oscillating signal for coagulation procedures and
  an unmodulated oscillating signal for cutting
  procedures. The unit includes a four arm bridge
  rectifier interconnected directly to the line
  voltage. A first pair of opposing diagonal
  terminals on the rectifier is connected directly
  to the line voltage.

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• A cutting signal is obtained from the other pair
  of diagonal terminals, and a coagulation signal
  is obtained across one arm of the bridge
  rectifier. An oscillator tank coil provides the
  necessary RF isolation output. A switch
  selectively interconnects either the coagulation
  signal output from the bridge rectifier, or the
  cutting signal output from the bridge rectifier,
  to the oscillator.

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• The output is taken across the tank circuit from
  the RF oscillator and applied to a patient
  through a handpiece. Through the use of high
  voltage transistors in the circuit, high
  efficiency is obtained by eliminating the input
  transformer of the prior art

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Maintenance

• Most maintenance on the electrosurgery power unit
  is generally performed by trained biomedical
  equipment technicians or biomedical engineers
  unless nursing staffers are adequately trained.
  The electrodes, however, must be cleansed and
  sterilized by the staff immediately following
  each surgery if they are not disposable.

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Medical Application

• ESUs are used for surgical cutting or to control
  bleeding by causing
• coagulation (hemostasis) at the surgical site.
  They deliver high-frequency
• electrical currents and voltages through an
  active electrode, causing desiccation,
• vaporization, or charring of the target tissue.
• ESUs are a useful tool in all aspects of the
  surgical arena from the most
• basic wart removal, spider veins, or hair removal
  in a doctors office to the

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• most intricate open heart, orthopedic, and
  transplant procedures.
• An ESU, by definition, is a generator capable of
  producing a cutting and/or
• coagulating clinical effect on tissue by the use
  of alternating current at a high frequency
• (RF - radio frequency, also known as radio
  surgery). Voltages and
• currents may vary depending on the desired
  clinical effect.

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• THANK YOU