Intracardiac pressure monitoring device

摘要

A method for telemetrically measuring a parameter in a patient's heart comprises the steps of imaging the heart and identifying an implantation site in the heart. An opening is created in the tissue at the implantation site. A sensor (50) comprising a housing (52), a membrane (56) at one end of the housing (52) wherein the membrane (56) is deformable in response to the parameter, and a microchip (90) positioned within the housing (52) and operatively communicating with the membrane (56) for transmitting a signal indicative of the parameter is provided. The sensor (50) is placed in the opening and the parameter is telemetrically measured from outside of the patient's body based on the transmitted signal by the sensor. The sensor (50) is also telemetrically powered from outside of the patient's body. A signal charging and reading device (140) is placed outside of the patient's body for telemetric powering and signal reading with respect to the sensor (50). In an alternative embodiment, the sensor (50) has a tapered distal end (54) and a tissue piercing tip (55) for direct implantation into tissue. Alternative embodiments of this sensor include helical threads (57) on the tapered distal end (54) for threading the sensor into tissue and a plurality of tissue barbs (59) for direct and firm anchoring of the sensor (50) in tissue. <IMAGE>