Engineering World Health Aspirator Client Advisor Dr John

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 § Check valves § Hospital integration § Future Work

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

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-Opti. Vac-G 180 -p/g 180. htm

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

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

Previous Design § § 12 v Battery Fan Motor String Lab Glove Diaphragm § Collection Chamber § Autoclavable Tip

Major Areas of Improvement § Vacuum source § Check valves § Hospital integration

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

Vacuum Source Design § Rubber diaphragm § Inner tube § Thicker, therefore more stable and durable http: //img. alibaba. com/photo/5178540 0/Inner_Tube. jpg § Syringe § Adjustable and consistent vacuum § Can be hard to push by the piston http: //hydroclimes. co. uk/shop/images/10485 -005%2010 cc%20 Syringe. jpg

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

Valve Design Three design alternatives Ball Valve Made from a funnel and a marble Single Flap Valve Made from a can lid and rubber from a bicycle inner tube Double Flap Valve Made from a can lid and rubber from a bicycle inner tube

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

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

Future Work § Build and test prototype § EWH § Building instructions § Construction pictures § Testing instructions § Operating instructions

References § Aspirator suction machine. , 2007, from http: //www. medicalsupply 4 u. com/prod. List. asp? id. Categ ory=112&show. Filter=0&id. Product=51 § Electro surgery continuing education model. (2007). March 12, 2007, from http: //www. valleylabeducation. org/esself/Pages/esself 2 3. 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

Any Questions?