Presentation on theme: "Douglas Christensen Department of Bioengineering University of Utah Salt Lake City, Utah 84121 Bringing an Integrative Modeling Experience to Freshman."— Presentation transcript:
Douglas Christensen Department of Bioengineering University of Utah Salt Lake City, Utah 84121 Bringing an Integrative Modeling Experience to Freshman Biomedical Engineering Courses
Univ of Utah Goals for our freshman courses Welcome students to the University and Department. Give students early exposure to exciting aspects of Biomedical Engineering. But …..
Univ of Utah But ….. Need to challenge students with realistic engineering tasks for them to accurately assess: their skill level their interest level. Goals for our freshman courses (cont)
Univ of Utah 1st Semester - Biomechanical and bioelectrical 2nd Semester - Biochemical, cellular and biosensors Two freshman courses
Univ of Utah 1st semester course structure Major lab project (modeling the human cardiovascular system) - entire semester. Lectures - “just-in-time” for project steps. Based on 15 units: Laws and Principles - most (80%) are needed for solution of major project.
Univ of Utah Laws and principles 1. Numbers, Units and Consistency Checks 2. Darcy’s Law (membranes) 3. Poiseuille’s Law (flow through tubes) 4. Hooke’s Law (elasticity and compliance) 5. Starling’s Law (cardiac adjustment ) 6. Euler’s Method (finite-difference solutions) 7. Muscle, Force and Leverage 8. Work, Energy and Power
Univ of Utah Laws and principles (cont) 8. Ohm’s Law (current, voltage, resistance) 9. Kirchhoff’s Laws (circuit analysis) 10. Operational Amplifiers (gain, feedback) 11. Coulomb’s Law (capacitors, fluid analog) 12. Thevenin Equiv (1 st -order time constants) 13. Nernst Potential (cell membrane) 14. Fourier Series
Univ of Utah Major lab project Modeling the human systemic cardiovascular system (pressures and flows) by: A.Matlab simulation (1 st half of semester) B. Electrical circuit analog (2 nd half of semester) Guyton & Hall
Univ of Utah Part B - electrical circuit analog Op amp (capacitance multiplier) for left ventricle. Resistances and capacitors for vessels. Diodes for valves. Students assemble circuit (teams of two). Measure voltages (for pressure) and current (for cardiac output).
Univ of Utah Oscilloscope recording from circuit
Univ of Utah Modeling some additional diseases 5. Atherosclerosis (increase R’s). 6. Aortic valve regurgitation (add R around diode).
Univ of Utah Conclusions Students learn by “doing”. Major lab project a mix of defined tasks and open-ended tasks. Close tie between lectures and lab project. Topics covered: modeling, computer programing, cardiovascular physiology, electricity & instrumentation. Supported in part by NSF EEC-0080452