| 摘要 |
<p>A body implantable lead affixed with a pin or pins at its proximal end adapted to be connected to a pulse generator or signal detector with an electrode or electrodes at its distal end adapted to be placed within a body cavity or in contact with body tissue. One or more electrical conductors encased within nonconductive body compatible material electrically connects the electrode with a pin and comprises a length of resilient, single filar or multifilar coil conductor wherein the conductor is non-circular in cross section. The non-circular cross section is preferably elliptic, oval, rectangular or trapezoidal with a major dimension generally perpendicular to the longitudinal axis of the length of coiled conductor and its minor dimension generally parallel to that axis, whereby a specific ratio of torque to bending stiffness is effected. Preferably, the body implantable lead is a unipolar or a bipolar transvenous screw-in lead possessing a spiral shaped screw fixation mechanism at the distal end of the lead which is at least mechanically connected to said length of conductor. The proximal end of said length of conductor is electrically and mechanically connected to the connector pin. Rotation of the connector pin effects the rotation of the spiral attachment mechanism into body tissue.</p> |
