Heart Phantom Lacey Halfen, Jessica Hause, Erin Main, Peter Strohm and Fan Wu Client: Orhan Unal Advisor: Willis Tompkins.

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Presentation transcript:

Heart Phantom Lacey Halfen, Jessica Hause, Erin Main, Peter Strohm and Fan Wu Client: Orhan Unal Advisor: Willis Tompkins

Outline Physiology of the Heart Atrial Fibrillation ▫Symptoms and complications ▫Treatment procedure Client’s Research Design Specifications Final Design ▫Casing ▫Heart chamber ▫Tubing connections ▫High definition block Future Testing

Heart Physiology

Atrial Fibrillation Characterized by ▫Irregular atrial beating ▫Disordered electrical signals ▫Poor blood flow ▫Increased blood clot risk Complications ▫Stroke (blood clots) ▫Heart Failure

Atrial Fibrillation Treatment Pulmonary Vein Isolation ▫Catheter Pathway  Enters at femoral vein  Travels through inferior vena cava into right atrium  Puncture through to left atrium ▫Tissue Ablation  Irregular impulses originate from pulmonary veins  Scaring of heart tissue to isolate irregular signals

Client’s Research Treatment of atrial fibrillation under MRI guidance ▫Solenoid-tipped catheter ▫Awaiting FDA approval  Animal/phantom testing  Human testing

Design Specifications Size ▫Diameter 13’’ ▫Length 13’’ Vasculature ▫Pulmonary Veins: inlets  10 – 20 mm (diameter) ▫Superior Vena Cava: outlet  20 – 30 mm (diameter) ▫Inferior Vena Cava: catheter entry point  20 – 30 mm (diameter) Heart chamber division ▫Permeable foam membrane ▫Thin disposable membrane MRI compatible (no ferrous materials) Transparent and leak proof

Final Design - Casing Pulmonary Veins Superior Vena Cava Inferior Vena Cava Drain Outlet to system Inlets to system Pump connection Catheter entry point with sheath

Final Design – Heart Chamber Disposable Septum Inferior Vena Cava Superior Vena Cava Pulmonary Veins Screws & Bolts O-rings Permeable Foam Membrane Allow fluid flow from left to right atrium Catheter entry point Seal heart chamber Catheter puncture from right to left atrium Seal heart chamber Outlet Inlets

Final Design – Heart Chamber Cont. Catheter PathwayFlow Pathway

Final Design – Tubing Connections Snap Grip Polycarbonate Tubing Acrylic Wall Tygon Tubing Tapered to prevent catheter from catching

Final Design – High Resolution Block Visualization of catheter and surrounding vasculature on MRI Central hole ▫Inferior vena cava Small holes ▫Surrounding vasculature

Future Testing Leak Testing ▫Static and dynamic Flow Testing ▫No air in tubing ▫Laminar flow MRI Testing ▫Visualization of catheter ▫High resolution block Septum Testing ▫Determine permeability and ease of replacement

Questions?

References Mayo Clinic Staff (2007) Heart Disease: Atrial Fibrillation. Retrieved February, 2009, from