Core body temperature device and system

A temperature device, comprising:

• a substrate, comprising:
• a center section;
• and
• a tail;
• a heater on the center section having an outer perimeter and an inner perimeter, wherein the inner perimeter defines a zone on the center section;
• a first thermal sensor disposed in the zone;
• a second thermal sensor disposed on the tail;
• a first insulator confronting a first side of the substrate, wherein the first insulator is to contact skin of a patient;
• and
• a second insulator confronting a second side of the substrate, the second insulator comprising:
• a first region with a first thermal resistance, the first region comprising:
• a first surface confronting the heater;
• and
• a second surface facing away from the heater, wherein the first and second surfaces define a first thickness of the first region;
• and
• a second region with a second thermal resistance less than the first thermal resistance, the second region comprising:
• a third surface confronting the first thermal sensor and stepped down relative to the first surface such that the first and third surfaces are not flush;
• and
• a fourth surface facing away from the first thermal sensor and stepped down relative to the second surface such that the second and fourth surfaces are not flush.

A temperature device, comprising:

• a flexible substrate, comprising:
• a center section;
• and
• a tail;
• a heater on the center section having an outer perimeter and an inner perimeter, wherein the inner perimeter defines a zone on the center section;
• a first thermal sensor disposed in the zone;
• a second thermal sensor disposed on the tail;
• a first insulator to confront a first side of the flexible substrate and to contact skin of a patient;
• and
• a second insulator to confront a second side of the flexible substrate, wherein the second insulator comprises:
• a first region with a first thermal resistance located over the heater;
• and
• a second region with a second thermal resistance less than the first thermal resistance, adjacent to the first region, defined by a hole therethrough that is alignable with the first thermal sensor to allow a portion of heat generated by the heater to escape and reduce thermal interference with the first thermal sensor.