1. Spring 2015 Senior Design College of Engineering The University of Georgia DEVELOPMENT OF AN EMBEDDED SYSTEM FOR ASSESSING EXTREMITY BLOOD VOLUMES BASED ON ELECTROCARDIOGRAPHY Faculty Mentor: Zion Tsz Ho Tse Graduate Mentor: T. Stan Gregory Driftmier Annex, Room 120

2. MIDTERM GRADES Discuss Interim Report 1 st

3. REVIEW FROM ORAL PRESENTATION I Tasks to accomplish  How???? Quantify accuracy. 10 bit adc with set gain. What is resolution? Difference in finger vs chest lead placement Record data using device and real 12 lead at same time. Compare signals. How does effect scale between 3t and 0.4t? Compare induced mhd. BE ABLE TO ANSWER THESE QUESTIONS NEXT MONDAY!!! Illustrate design process a bit more QFD Pugh

4. NEXT STEPS Learn to use 12-lead ECG recorder MHD Bench-Top Experiments MRI Scanner Time Trying to get team access to scanner room Who needs safety training? Record MHD voltages with lead placements similar to use in your stand-alone device Prelim/Design data for your report Upgrade your device to record MHD voltages

5. MHD REVIEW

6. ELECTROCARDIOGRAM (ECG)

7. MHD EFFECT REVIEW MHD Voltages (VMHD) Induced in ECG due to interaction between B 0 & ionic blood flow Dominant during early systole Blood rapidly ejected from left ventricle to aorta Equation B = magnetic field L = distance u = blood velocity V = Blu (constant B and u)