Sensor assemblies for implantable medical electrical leads

An implantable sensor assembly comprising:

• an insulative body formed from a biocompatible plastic, the body including a proximal portion and a mounting surface, the mounting surface extending distally from the proximal portion;
• a first conductive insert extending within and being surrounded by the proximal portion of the insulative body, the first insert including a first, conductor-coupling end extending proximally from the insulative body and a second, sensor-coupling end extending distally from the proximal portion of the insulative body;
• a second conductive insert extending within and being surrounded by the proximal portion of the insulative body, and further being spaced apart and electrically isolated from the first conductive insert, the second conductive insert including a sensor-coupling end extending distally from the proximal portion of the insulative body;
• and
• a sensor mounted on the mounting surface of the insulative body and being coupled to the sensor-coupling ends of the first and second conductive inserts, the sensor including an active surface facing away from the mounting surface of the insulative body.

A medical electrical lead comprising:

• an insulative lead body;
• a plurality of elongate conductors electrically isolated from one another and extending within the lead body;
• and
• a sensor assembly attached to the lead body, the sensor assembly comprising:
• an insulative body formed from a biocompatible plastic, the body including a proximal portion attached to the lead body and a mounting surface extending distally from the proximal portion;
• a first conductive insert extending within and being surrounded by the proximal portion of the insulative body, the first insert including a first end extending proximally from the insulative body and being coupled to a first conductor of the plurality of elongate conductors;
• a second conductive insert extending within and being surrounded by the proximal portion of the insulative body, and further being spaced apart and electrically isolated from the first conductive insert, the second conductive insert being coupled to a second conductor of the plurality of elongate conductors;
• a sensor mounted on the mounting surface of the insulative body and being coupled to the first and second conductive inserts, the sensor including an active surface facing away from the mounting surface of the insulative body;
• an electrode extending around the sensor and the insulative body, the electrode including an aperture positioned to expose the active surface of the sensor therethrough;
• and
• an insulative sealing material extending at least about a perimeter of the aperture of the electrode and within the electrode.