Uniaxial multifilar vaso-occlusive device with high stretch resistance and low buckling strength
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United States of America Patent
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Issued Date -
Jan 8, 2004
app pub date -
Jul 2, 2002
filing date -
Jul 2, 2002
priority date (Note) -
Abandoned
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Abstract
A multifilar vaso-occlusive implant device includes a plurality of elongate filars conjointly wound into helical coils having respective windings arranged in an alternating, uniaxial adjacency with each other. The respective windings of the coils may have the same or different mean diameters and pitches, and the materials, cross-sectional shapes and areas of the respective filars of the coils may be the same or variegated to achieve a desirable increase in the axial stretch resistance, and reductions in the respective axial bending and buckling resistances of the device. A rounded obturator tip may advantageously be attached at the distal end of the device, and a coupling element for releasably coupling the device to a delivery mechanism may advantageously be attached to the proximal end of the device. A flexible tube or porous sponge may be disposed in the axial lumen of the device and loaded with a bio-active agent for delivery to a patient via implantation of the device in the patient.
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