INTRACARDIAC PRESSURE MONITORING METHOD

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 sit e in the heart. An opening is created in the tissue at the implantation site. A senso r comprising a housing, a membrane at one end of the housing wherein the membrane is deformable in response to the parameter, and a microchip positioned within t he housing and operatively communicating with the membrane for transmitting a signal indicative of the parameter is provided. The sensor is placed in the opening and the parameter is telemetrically measured from outside of the patient's body base d on the transmitted signal by the sensor. The sensor is also telemetrically powered from outside of the patient's body. A signal charging and reading device is place d outside of the patient's body for telemetric powering and signal reading with respec t to the sensor. In an alternative embodiment, the sensor has a tapered distal end an d a tissue piercing tip for direct implantation into tissue. Alternative embodiments of this sensor include helical threads on the tapered distal end for threading the sensor into tissue and a plurality of tissue barbs for direct and firm anchoring of the sensor in tissue.