Patent ID: 9155882
Filing Date: 2015-10-13
Classification: A61N

Abstract:
1. An implantable medical device comprising a hermetically sealed housing and a tissue-penetrating fixation component, the housing defining a longitudinal axis of the device, and the fixation component comprising a base portion fixedly attached to the housing and at least one tine portion extending therefrom, the at least one tine portion comprising a hook segment and a distal segment, the hook segment being pre-set to extend along a curvature that encloses an angle of between 135 degrees and 270 degrees, from a proximal end thereof, in proximity to the base portion, to a distal end thereof, the distal segment being pre-set to extend along a straight line that is tangent to the distal end of the hook segment, and the hook segment being elastically deformable from the pre-set curvature to an open position; and wherein: the distal segment of the at least one tine portion of the fixation component comprises a tooth and an end that surrounds the tooth; the tooth includes a foot and a tissue-piercing tip, a length of the tooth being defined from the foot to the tip; the end includes a pair of legs and a distal arch, the legs extending along the length of the tooth, on opposing sides thereof, the distal arch extending between the legs and distal to the tip, the legs being configured to bend in elastic deformation, when the hook segment of the at least one tine portion of the fixation component is elastically deformed to the open position and a force is applied, along the longitudinal axis, to push the distal arch of the distal segment against tissue, for initial tissue penetration, and the bending of the legs exposing the tip of the tooth of the distal segment to the tissue; and the tooth of the distal segment is configured to resist bending when the force is applied.