Patent ID: 8578795

Claim:
An implantable active pressure transducer comprising: a pressure sensing element; sensor circuitry for operating the pressure sensing element, the sensor circuitry electrically connected to the pressure sensing element; an innermost packaging enclosing the pressure sensing element and the sensor circuitry; the innermost packaging having an opening defined therein; the pressure sensing element being bonded to the innermost packaging substantially aligned with the opening defined therein; an outermost packaging made of a metal forming an interior cavity divided into first and second chambers; the innermost packaging being disposed within the first chamber without being fixed to the outermost packaging; the outermost packaging having an inlet and an outlet both in fluid communication with the first chamber for allowing a flow of a pressure transmitting fluid into the outermost packaging and through the opening defined in the innermost packaging so as to be in contact with the pressure sensing element; communication circuitry disposed within the second chamber; and a battery disposed within the second chamber and electrically connected to power the communication circuitry, the communication circuitry and battery being hermetically isolated from the pressure transmitting fluid in the first chamber.