Body implantable lead

Details Body implantable lead Body implantable lead

1981-05-08

1983-09-06

Kamm, William E.

Surgery

Truss

Pad

128419P, A61N 104

Patent

active

044023308

ABSTRACT:
A lead for a body implantable electrical stimulation system including at least one electrical conductor and electrical insulation which together define a flexible lead body. A stiffening system, in the form of a member coiled about a portion of the lead body, is provided to enhance the ability of that lead body portion to maintain its orientation in the presence of external forces, including forces imparted to the lead by movement of the body as well as gravity. Preferably, the coiled member is a multifilar member and, in a preferred embodiment, is a close wound trifilar member. The desired lead body orientation may be a straight or curved configuration and, in the latter instance, the lead body may be provided with a lumen such that the curve is extended or straightened on insertion of a stylet of sufficient stiffness. A body compatible material may overlie the coiled member to provide a smooth exterior surface at the stiffened lead body portion and, in a preferred embodiment, extends beyond the lead body portion to provide a stiffness transition region adjacent the coiled member.

REFERENCES:
patent: 3087486 (1963-04-01), Kirkpatrick
patent: 3222755 (1965-12-01), Grass
patent: 3516412 (1970-06-01), Ackerman
patent: 3890977 (1975-06-01), Wilson
patent: 4020829 (1977-05-01), Wilson et al.

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