Patent ID: 8870908

Claim:
A primary wind coil, comprising: a flexible metal wire coiled about a primary wind coil longitudinal axis to form a primary wind coil having an inner lumen, said primary wind coil being elongated along said primary wind coil longitudinal axis, said primary wind coil having an exterior non-circular primary wind coil cross-sectional shape and a corresponding interior non-circular primary wind coil cross-sectional shape, said exterior and corresponding interior non-circular primary wind coil cross-sectional shapes being elongated along a first transverse axis that is transverse to said primary wind coil longitudinal axis, said first transverse axis of said non circular primary wind coil cross sectional shape and said interior non-circular primary wind coil cross-sectional shape precessing along said primary wind coil longitudinal axis to form a repeating twisted coil pattern, said primary wind coil having a first plane of minimum bending force that correspondingly precesses together with said first transverse axis and said interior non-circular primary wind coil cross-sectional shape along said primary wind coil longitudinal axis, wherein said primary wind coil is sized to fit within an aneurysm, fistula or vascular cavity.