1. Engineering World Health: Aspirator
Client: Dr. John Webster
Advisor: Paul Thompson
Team
Lucas Vitzthum - Team Leader
Fan Wu - BWIG
Nick Harrison - Communications
Tyler Lark - BSAC

2. Outline Problem Statement Background Existing Devices
Design Specifications
Design Ideas
Design Matrix
Future Work

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

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

5. Current Devices Brands Problems Gomco (Allied Medical) Res-Q-Vac Apria
Many!
Problems
Expensive
Specialized
Not locally repairable

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

7. General Setup
Autoclavable tip
Collection chamber
Vacuum source

8. Water Hourglass Water flow from top to bottom Venturi effect
360 degree rotation

9. Pros and Cons Pros Cons Simple setup Parts easily obtainable
Water available in 3rd world hospitals
Inexpensive
Cons
Weak vacuum
Obstructs operating room environment

10. Foot Pump Mechanical Human powered Pair of one-way valves
Two-stage system
Compression
Restitution

11. Foot Pump Advantages: Disadvantages: Inexpensive
Man-powered (Independent of electricity)
Easily replaceable
Disadvantages:
Weak vacuum
Inconsistent airflow
Physically demanding

12. Electric Vacuum Pump Design
Salvaged Electric Motor
Conversion to linear ossilations
Contractions of Diaphram
One way valves
12V car battery

13. Vacuum Pump (cont.) Pros Cons Reliable, continuous vacuum Versatile
Complicated design
Difficult to build
Reads multiple Pressures,,, more versitile
cons
can’t use spring

14. Design Matrix Foot Pump Water Hourglass Electric Pump 7 8 4 9 5 2 1 3
Power Availability (10) 7 8 4
Construction Resources (10) 9 5
Pressure (10) 2
Hospital integration (5)
Reliability/ Safety (10) 1
Cost (5) 3
Total 28 30 33

15. Future Work Design an airflow control Finalized design
Acquire materials for a prototype
Build
Test

16. Any Questions?