Midpoint Project Review P10454 VAD Test Loop Alex Moulton Mechanical Engineer BS/ME

Project Information Project Name: -----------VAD Test Loop Project Number: --------P10454 Project Family: ----------P09454, P09021 Start Term: ---------------Fall 20091 End Term: ----------------Winter 20092 Track: ----------------------Assistive Devices and Bioengineering Faculty Guide: ----------Dr. Steven Day Technical Advisor: ----Ed Hanzlik Primary Customer: ----Dresser-Rand Secondary Customer: Dr. Day, SD 20093 teams

Planning Mission Statement Overview: Left Ventricular Assistant Device (LVAD) is designed for people in the future to have mobility while waiting for a heart transplant. The test loop is a model of the human body so we can identify and model the pump characterization curves and to test the damage caused by the LVAD to the blood. Family Goals: Create a more effective/efficient blood circulation loop My Goals: Fit & Finish, decrease it’s size and take care of the flaws/problems the previous teams have been suffering. Future Goals: LVAD eventually be placed in the human body Primary Market: Patients on the heart transplant waiting list, healthy enough for day to day living Stakeholders: Staff and Teachers affiliated with this project, students in present and upcoming senior design teams, and future patients.

Concept Development Customer/Interview/Minutes Interviewed Check List Dr. Day (FG), Ed Hanzlik (TA), Christine Lowry (SD Design Engineer), Jon Klien (SD Project Lead) Compressed Minutes Heating/Cooling, Connection/Leaks, Blood Damage/Coagulation, Sensor Accuracy, Overall Size

Merging of Projects 09021 and 09454 have very similar needs. 454 is researching impellers and diffusers 021’s pump is heating the blood excessively and causing blood damage If 454 can create an impeller that is more efficient and generates less heat 021 will not have nearly the same blood damage that they expect to have with the current impeller.

Concept Development Customers Needs Reason for investment: The current available LVAD is to large and is not portable. Test Loop System will help with the design of the LVAD Produce an LVAD that is small enough to be implanted in the abdomen or be able to attach to ones belt. Direct correlation to the patients quality of life. A new technology that has to be explored.

Assumptions and Constraints Blood is Newtonian No blood damage Drain and fill times must be fast (minutes) Cost must be within budget Continuous use Pressure must be low enough for quick connect usage Temperature must be held constant +/- Data processing must be completed in seconds Flow rate must be around 5 liters/min

Affinity Diagram Maintainability Complexity Compatibility Time Resources LVAD’s continuous use Only a few people know how to use programs Interfaces not hooking up Insufficient Time for completion Conflicting Priorities Cleaning clogs out How to model circulatory system Parts not connecting properly Unrealistic Schedules Changing requirements/needs Keep sensors working Biocompatible Computer programs not working Parts not coming in Bottlenecking Leak Prevention LVAD not much info about People not working well together Overworked Not knowing answers or needs

Voice of the Engineer

Objective Tree

Function of the Project (Test Loop)

House of Quality VOC to VOE Data Processing Portability Protect Blood Pump Blood Size 1 Ease of use 9 Dependability 3 Comfort

Future Plans Quarter Plans Produce an LVAD Test Loop that would Be smaller, more efficient, more effective, and have greater sensor capabilities in each model made. I would like to visit the current 021 team in their review sessions and get more feed back from their design problems. For the final presentation have a conclusion on what needs to be fixed for next year

Latest Meeting Info No Leaks and quick connects have about 3 drops when they are disconnected Draining system works great. Complete drainage in 20 seconds Heater is assembled but not active Pump works great for circulation of the water tank Water tank is used for the heating and cooling of the blood (indirect and slow) Epoxy or grease is needed to seal the o-ring for the glycerin (blood substitute) lid

Sources Edge website 09021 Edge website 09454

Questions?