#$%^&*AU2007202209B220120726.pdf#####5 ABSTRACT A medical instrument including a medical catheter having a distal end insertable within a body lumen of a patient, having a first flexible catheter segment, and having a second flexible catheter segment located distal the first flexible 10 catheter segment. The first flexible catheter segment includes a first loop sensor and includes an active first catheter stiffener adapted to stiffen and un-stiffen substantially only the first flexible catheter segment. The second flexible catheter segment includes a second loop sensor and includes an active second catheter stiffener adapted to stiffen and un-stiffen substantially only the second 15 flexible catheter segment. A method for using the medical instrument is also presented.3/7 22 18 5 52 5 FIG. 4 281 22 46o 12 30 525 3b- _14 46 4 FIG. 6 FIG. 5
