Implantable device header with embedded sensor and antenna
A device and method for manufacturing an implantable cardiac monitor device are provided. The method joins a feed-through assembly to a device housing having electronic components therein. The feed-through assembly includes conductors having distal ends connected to the electronic components and has proximal ends projecting from the feed-through assembly. The method assembles a header having a sensing electrode and an antenna embedded within a non-conductive header body. The electrode and antenna includes corresponding interconnection plates. The header body includes a housing mounting surface that includes at least one passage aligned with an interconnect cavity that includes the interconnection plates. The header body further includes a window exposing the interconnect cavity and interconnect regions. The method further directs the proximal ends of the conductors through the passage to align with the interconnect regions and secures the proximal ends and the interconnect regions to one another through the window.
1. An implantable cardiac device, comprising:
a device housing having electronic components therein;
a feed-through assembly joined to the device housing, the feed-through assembly including conductors having distal ends connected to the electronic components and having proximal ends projecting from the feed-through assembly;
a header having a header body formed from a biocompatible material that encapsulates a sensing electrode and an antenna in the material forming the header body, the electrode and antenna including corresponding interconnect regions, the header body including a housing mounting surface that includes at least one passage aligned with the interconnection regions, the header body further including a window opening laterally onto a side of the header body, the window exposing the interconnect regions;
the proximal ends of the conductors extending through the passage and aligning with the interconnection regions; and
the window configured to provide access to the proximal ends and the interconnection regions.
2. The device of claim 1 , wherein the header body is formed of an injection molded flowable material that embeds the electrode and antenna therein.
3. The device of claim 1 , wherein the header body includes a recessed chamber formed in the housing mounting surface, the header body further comprising a band provided about a perimeter of the recessed chamber.
4. The device of claim 3 , wherein the band includes one or more tabs that are bent to extend inward above the recessed chamber to provide mechanical anchoring points between the header and the device housing.
5. The system of claim 1 , wherein the electronic components are configured to record cardiac signals sensed by the sensing electrode.
6. The system of claim 1 , wherein the header includes opposite sides that are elongated to extend along a longitudinal axis and the electrode includes a sensor body portion, the sensor body portion being positioned to face laterally proximate to one of the sides of the header, the sensor body portion being oriented along a plane that extends at a select angle relative to the longitudinal axis.
7. The system of claim 1 , wherein the passage extends in a first direction from the mounting surface through the header and the window opens laterally in a second direction onto the side of the header.
8. The system of claim 1 , wherein the header body includes an interconnect cavity joined to the at least one passage extending from the mounting surface, the proximal ends and the interconnection regions located in the interconnect cavity.