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Engineering World Health: Aspirator

Engineering World Health: Aspirator. Client & Advisor: Dr. John Webster. Lucas Vitzthum - Team Leader Fan Wu - BSAC Nick Harrison - Communications Jonathan Meyer - BWIG. Outline. Problem Statement Background Design Specifications Previous Design Improvements Vacuum source

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Engineering World Health: Aspirator

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

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

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

  4. 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/g180.htm

  5. Current Devices • Problems • Expensive • Specialized • Not locally repairable http://www.mdsnq.com.au/products/212/140207130315.jpg

  6. Design Specifications • Locally available materials • <$100 • Autoclavable suction tips • Vacuum pressure: 0 – 550 mmHg • Flow rate: 0 – 30 Lpm • Sterile and safe

  7. Previous Design • 12v Battery • Fan Motor • String • Lab Glove Diaphragm • Collection Chamber • Autoclavable Tip

  8. Major Areas of Improvement • Vacuum source • Check valves • Hospital integration

  9. Piston Design • Transform the rotational kinetic energy to linear kinetic energy (½ I ω^2 to ½ mV^2) • Improvement from original prototype: rigid arm over string

  10. 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.jpg http://hydroclimes.co.uk/shop/images/10-485-005%2010cc%20Syringe.jpg

  11. Valve Design • Last semester’s valves • Sphignomonometer valve • One balloon valve • Problems • Cost • Efficiency • This semester Develop an efficient, inexpensive valve made from locally available materials

  12. Valve Design 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 Three design alternatives

  13. Valve Design Probable design: Single flap valve • Easiest to build • Can be constructed inside and outside a pipe

  14. Hospital Integration • Reduce size • Cover • Mobile • On/off switch • Pressure control http://25frames.org/media/screens/6617.jpg

  15. Future Work • Build and test prototype • EWH • Building instructions • Construction pictures • Testing instructions • Operating instructions

  16. References Aspirator suction machine., 2007, from http://www.medicalsupply4u.com/prodList.asp?idCategory=112&showFilter=0&idProduct=51 Electro surgery continuing education model. (2007). March 12, 2007, from http://www.valleylabeducation.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

  17. Any Questions?

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