Engineering World Health: Aspirator

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Engineering World Health Aspirator
Client Advisor Dr. John Webster
Lucas Vitzthum - Team Leader Fan Wu - BSAC Nick
Harrison - Communications Jonathan Meyer - BWIG
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Outline

• Problem Statement
• Background
• Design Specifications
• Previous Design
• Improvements
• Vacuum source
• Check valves
• Hospital integration
• Future Work

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Problem Statement

• Medical Aspirator
• 3rd World Application
• Limited power
• Locally available parts/expertise
• Inexpensive
• Clear Instructions

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Background Information

• Remove mucus and other bodily fluids
• Wide range of uses
• Liposuction
• Nasal
• Gastric
• Dental
• Endocervical
• Pediatrics
• Portable
• Battery or AC

http//www.usemc.com/Allied-Gomco-OptiVac-G180-p/g
180.htm
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Current Devices

• Problems
• Expensive
• Specialized
• Not locally repairable

http//www.mdsnq.com.au/products/212/140207130315.
jpg
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Design Specifications

• Locally available materials
• lt100
• Autoclavable suction tips
• Vacuum pressure 0 550 mmHg
• Flow rate 0 30 Lpm
• Sterile and safe

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Previous Design

• 12v Battery
• Fan Motor
• String
• Lab Glove Diaphragm
• Collection Chamber
• Autoclavable Tip

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Major Areas of Improvement

• Vacuum source
• Check valves
• Hospital integration

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Piston Design

• Transform the rotational kinetic energy to linear
  kinetic energy
• (½ I ?2 to ½ mV2)
• Improvement from original prototype rigid arm
  over string

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Vacuum Source Design

• Rubber diaphragm
• Inner tube
• Thicker, therefore more stable and durable
• Syringe
• Adjustable and consistent vacuum
• Can be hard to push by the piston

http//img.alibaba.com/photo/51785400/Inner_Tube.j
pg
http//hydroclimes.co.uk/shop/images/10-485-00520
10cc20Syringe.jpg
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Valve Design

• Last semesters valves
• Sphignomonometer valve
• One balloon valve
• Problems
• Cost
• Efficiency
• This semester
• Develop an efficient, inexpensive valve made from
  locally available materials

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Valve Design

• Three design alternatives

Ball Valve
Single Flap Valve
Double Flap Valve
Made from a funneland a marble
Made from a can lid and rubber from a bicycle
inner tube
Made from a can lid and rubber from a bicycle
inner tube
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Valve Design

• Probable design Single flap valve
• Easiest to build
• Can be constructed inside and outside a pipe

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Hospital Integration

• Reduce size
• Cover
• Mobile
• On/off switch
• Pressure control

http//25frames.org/media/screens/6617.jpg
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Future Work

• Build and test prototype
• EWH
• Building instructions
• Construction pictures
• Testing instructions
• Operating instructions

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References

• Aspirator suction machine., 2007, from
  http//www.medicalsupply4u.com/prodList.asp?idCate
  gory112showFilter0idProduct51
• Electro surgery continuing education model.
  (2007). March 12, 2007, from http//www.valleylabe
  ducation.org/esself/Pages/esself23.html
• Hill, D. (2005). Duke engineering program
  improves hospital conditions in developing
  countries. Retrieved 4/12, 2007, from
  http//www.dukenews.duke.edu/2005/09/DEWH.html

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Any Questions?