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.
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Citations
17 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. - 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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17. A method of manufacturing a header for an implantable medical device, comprising:
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providing a plurality of header components including preformed wire conductors, contact blocks, contact rings, and a female threaded anchor for construction of a header housing assembly; welding ends of the preformed wire conductors to contact blocks and contact rings using resistance or laser welding to form sub-assemblies; positioning the contact blocks and the contact rings of the welded sub-assemblies onto core pins; placing distal ends of the wire conductors in shut off regions adjacent a mold cavity; coupling the female threaded anchor with a core pin; placing the component and core pins of the header housing assembly into a mold cavity; overmolding the components and core pins of the header housing assembly with a polymer; extracting the core pins from the mold cavity; ejecting the header housing assembly from the mold cavity; testing the header housing assembly electrically; and attaching the lead lock member to the header housing assembly.
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Specification