Implantable device with optical lead connector
An implantable active medical device includes a housing defining a hermetic cavity, a lead connector receptacle extending into the implantable active medical device, and a solid state light source disposed within the hermetic cavity and optically coupled to the lead connector receptacle.
1. An implantable active medical device comprising a hermetic cavity defined by a hermetic enclosure, the medical device comprising:
a housing defining a housing cavity and forming a first portion of the hermetic enclosure defining the hermetic cavity;
a lead connector receptacle configured to mate with a lead and defining a length extending into the housing cavity, the lead connector receptacle comprising contact rings separated by insulating rings in axial alignment defining a hermetic tube forming a second portion of the hermetic enclosure even when a lead is not mated to the lead connector receptacle;
an optical feedthrough disposed in the housing cavity and hermetically bonded to the lead connector receptacle to form a closed end portion of the hermetic tube and forming a third portion of the hermetic enclosure, the optical feedthrough configured to transmit light through the hermetic enclosure; and
a solid state light source disposed within the hermetic cavity and optically coupled to the optical feedthrough of the lead connector receptacle.
2. The implantable active medical device according to claim 1 wherein the lead connector receptacle comprises an electrical contact configured to mate with an electrical contact element on a lead connector engaged in the lead connector receptacle.
3. The implantable active medical device according to claim 1 wherein the optical feedthrough defines a closed end surface of the lead connector receptacle.
4. The implantable active medical device according to claim 3 wherein the lead connector receptacle extends between an open end and the optical feedthrough closed end and wherein an electrical contact, configured to mate with an electrical contact element on a lead connector engaged in the lead connector receptacle, forms a portion of the lead connector receptacle between the open end and the optical feedthrough closed end.
5. The implantable active medical device according to claim 1 wherein a light guide optically couples the optical feedthrough to the lead connector receptacle.
6. The implantable active medical device according to claim 1 wherein the lead connector receptacle comprises an optical coupling element contacting the optical feedthrough and within the lead connector receptacle, the optical coupling element having a matching index of refraction with the optical feedthrough.
7. An implantable active medical device system comprising a hermetic cavity defined by a hermetic enclosure, the medical device system comprising:
an implantable active medical device comprising:
a housing defining a housing cavity and forming a first portion of the hermetic enclosure defining the hermetic cavity;
a lead connector receptacle configured to mate with a lead and defining a length extending into the housing cavity, the lead connector receptacle comprising contact rings separated by insulating rings in axial alignment defining a hermetic tube forming a second portion of the hermetic enclosure even when a lead is not mated to the lead connector receptacle;
an optical feedthrough disposed in the housing cavity and hermetically bonded to the lead connector receptacle to form a closed end portion of the hermetic tube and forming a third portion of the hermetic enclosure, the optical feedthrough configured to transmit light through the hermetic enclosure;
a solid state light source disposed within the hermetic cavity and optically coupled to the optical feedthrough of the lead connector receptacle; and
a lead extending between a proximal end and a distal end, a lead connector portion disposed at the proximal end and configured to mate with the lead connector receptacle.
8. The implantable active medical device system according to claim 7 , wherein the lead comprises an optical fiber and an electrical conductor extending along a length of the lead.
9. The implantable active medical device system according to claim 7 , wherein the lead extends between a proximal end portion and a distal end portion and a lead connector is disposed at the proximal end portion and the lead connector is both electrically and optically coupled to the lead connector receptacle.
10. The implantable active medical device system according to claim 9 , wherein the distal end portion comprises an electrode that is electrically coupled to the lead connector receptacle and an optical window that is optically coupled to the lead connector receptacle.
11. The implantable active medical device system according to claim 10 , wherein the distal end portion comprises a plurality of optical windows spaced apart along a length of the distal end portion of the lead.
12. The implantable active medical device system according to claim 7 further comprising an optical coupling element within the lead connector receptacle and contacting both the lead connector receptacle and the lead, the optical coupling element having a matching index of refraction with the optical feedthrough.
13. The implantable active medical device system according to claim 7 wherein the optical feedthrough defines a closed end surface of the lead connector receptacle.
14. The implantable active medical device system according to claim 13 , wherein the lead connector receptacle extends between an open end and the optical feedthrough closed end and wherein an electrical contact, configured to mate with an electrical contact element on a lead connector engaged in the lead connector receptacle, forms a portion of the lead connector receptacle between the open end and the optical feedthrough closed end.