Abstract: An implantable, extractable probe for attachment to a vessel or organ. The probe is made up of an elongate probe body having front and rear ends, and top and bottom sides, the elongate probe body terminating in a flexible tube. The probe has at least one biological sensor attached to the bottom side of the probe body with at least one lead wire connected to the biological sensor, and the lead wire extends through the flexible tube. The probe includes a suture attachment wire for attaching at least one suture to secure the probe body to a predetermined sensor site, the suture attachment wire being releasably connected to the front of the elongate probe body and extending through the flexible tube, at least a portion of the suture attachment wire extending between the front of the elongate probe body and the flexible tube such that it is spaced a predetermined distance from the probe body.