OPENING MECHANISM FOR UMBRELLA-LIKE INTRAVASCULAR SHUNT DEFECT CLOSURE DEVICE

摘要

OPENING MECHANISM FOR UMBRELLA-LIKE INTRAVASCULAR SHUNT DEFECT CLOSURE DEVICE The pivotable struts of an umbrella-like shunt defect closure device are resiliently biased from a collapsed position to an expanded position by resilient and foldable flat ring sections which extend between the struts when the struts are in their expanded positions but which are folded between the struts when the struts are in their collapsed positions.