Distal Protection Filter Fault Tree Diagram Mechanical function Filter not closing Operator error Turbulence Filter releasing contents before closing Pressure change Filter bursting/hole Too many emboli (filter too full) Filter detaching Patient Hazards Production malfunction Failure to cross lesion Improper design Weak material Pores too large Failure to capture all emboli Embolization during retrieval Tortuous vessel Vessel irritation Stroke Chenara Sandeep Daphne Perry 17.11.04 Change in stiffness

Distal Protection Filter Fault Tree Diagram Rev #1 Mechanical function Filter not closing User error Turbulence Filter releasing contents before closing Pressure change Filter bursting/hole Too many emboli (filter too full) Filter detaching Patient Hazards Production malfunction Failure to cross lesion Improper design Weak material Pores too large Failure to capture all emboli Embolization during retrieval Tortuous vessel Vessel irritation Stroke Change in stiffness