LEAD ENGAGEMENT DEVICES AND METHODS FOR ELECTRICAL STIMULATION AND/OR MONITORING SYSTEMS

According to aspects of the present disclosure, an implantable pulse generator includes a housing, a header, and a retainer device. The housing includes circuitry and a battery. The header is coupled to the housing and includes a bore configured to receive an end of a lead, and a passage disposed transverse to the bore and extending between an exterior surface of the header and an anchor cavity that extends into the header from the bore. The header supports at least one electrical contact within the bore coupled to the circuitry. The retainer device includes a looped member arranged within the bore, a proximal end extending at least partially into the passage, and anchored at a distal end by the anchor cavity. The looped member has a first position defining a first loop diameter that permits egress of the lead into the bore and a second position defining a second loop diameter that occludes at least a portion of the bore and is configured to engage at least two opposing sides of the lead sufficiently to prevent egress of the lead from the bore. The first loop diameter is greater than the second loop diameter.