Set screw-less pacemaker header with lead lock system
First Claim
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1. A header for an implantable medical device, comprising:
- a molded polymer housing for encapsulating a plurality of conductive components to insulate the components from unwanted contact with one another and surrounding body materials, the housing including a recessed portion, a plurality of bores sized to receive leads and provide lead access to one or more of the conductive components, and an internally-threaded anchor member; and
a lead lock member located in the recessed portion of the housing including a plurality of apertures including inwardly-tapering collet members disposed about the apertures, and a lock screw engageable within the anchor member to cause axial constriction of the collet members within the bores to lock in place leads inserted into the bores.
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Accused Products
Abstract
A header for an implantable medical device such as a pacemaker which contains an advantageous molded design with encapsulated wires and conductive features. The header including a specifically formed lead lock member in which a plurality of collets residing in bores in the molded housing are used to retain and lock implantable leads in place without the use of set screws.
40 Citations
16 Claims
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1. A header for an implantable medical device, comprising:
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a molded polymer housing for encapsulating a plurality of conductive components to insulate the components from unwanted contact with one another and surrounding body materials, the housing including a recessed portion, a plurality of bores sized to receive leads and provide lead access to one or more of the conductive components, and an internally-threaded anchor member; and a lead lock member located in the recessed portion of the housing including a plurality of apertures including inwardly-tapering collet members disposed about the apertures, and a lock screw engageable within the anchor member to cause axial constriction of the collet members within the bores to lock in place leads inserted into the bores. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A header for an implantable medical device, comprising:
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a polymer housing defining a plurality of lead bores molded within the header for receiving leads and an internally-threaded anchor member, wherein each of said lead bores includes an electrical contact at the bore perimeter coupled to a wire; and a lead lock member defining a plurality of apertures surrounded by collet member protrusions for alignment with said plurality of lead bores, and a fastener that engages the anchor member and is adjustable to cause constriction of the lead lock member upon engagement of the fastener; wherein the axes of the apertures are offset from the axis of the fastener. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A header for an implantable medical device, comprising:
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a molded polymer housing for encapsulating a plurality of conductive components for insulation from unwanted contact with one another and surrounding body materials, the housing including a plurality of bores sized to receive leads and provide lead access to one or more of the conductive components, a two-tiered recessed region having an inner recess and an outer recess, a plurality of threaded features, and an internally threaded anchor; a lock wing located within the inner recess of the housing containing a plurality of outwardly projecting features on at least two locations for interfering with leads received in the bores;
a lock wing retention plate secured within the outer recess of the housing, the lock wing retention plate having a recess region shaped to accommodate rotational movement of the lock wing between a locked position and an unlocked position, and a plurality of apertures aligned with the bore leads, and threaded features of the housing;a plurality of threaded locking fasteners to secure the lock wing retention plate to the housing; and a locking screw for rotating the lock wing between the locked position and the unlocked position.
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Specification