ESU Tester

1
ESU Tester

• BME Design 201
• Spring 2005

2
Project Team

• Group Members
• Ashley Anderson
• Chris Wegener
• Yik Ning Wong
• Sara Worzella

• Client
• John G. Webster
• Advisor
• John G. Webster

3
Electrosurgery Background

• Function
• passes a high frequency current through target
  tissue
• Components
• Power unit
• Active electrode
• Dispersive electrode

Source http//www.valleylab.com/education/poes/po
es_03.html
4
Electrosurgery Background

• Waveforms
• Cutting
• Coagulation
• Blended current
• Types
• Bipolar
• Monopolar

Source Pearce, JA. 1986. Electrosurgery. John
Wiley Sons, New York.
Source http//www.valleylab.com/education/poes/po
es_10.html
5
Problem Statement

• To design a ESU Tester, a device for determining
  the power output of an electrosurgery device.

6
Specifications
7
Special Concerns

• Due to operating environment, the device needs to
  be easily sterilized.
• Burning of patients with is a major safety issue
  to patients

8
Competitions

• No competition have been found.
• More expensive units range from 2000-8000
• eg,

Valleylab ForceFX electrosurgerical generator
9
Design Solutions - Loads

• Power Resistors
• Known resistance and power rating
• Expensive
• Water Heater
• High power rating
• Low cost
• Unknown resistance
• Needs water
• Light Bulbs
• High, known power rating
• Very low cost
• Fragile, bulky

http//www.arcol.co.uk/
http//www.kitchenfantasy.com/
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Design Solutions Circuit
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Design Solutions External

• Dimensions 1 x 1 x 5
• Easy to grip Ergonomic design
• Insulated
• Electricity
• Heat
• Inputs Must withstand current
• Alligator clips
• Terminals to fit ESU plug
• Conductive pads

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Future Work Final Design

• Conduct Tests
• Loads
• Heat dissipation
• Resistance
• Cost
• Post-load circuits
• Effectiveness
• Output readability
• Cost
• Research
• Alternative loads and post-load circuits
• Contact users (hospital staff)
• Ergonomics
• Appearance
• Features