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 catheter segment. The first flexible catheter segment includes a...http://www.google.se/patents/US7892166?utm_source=gb-gplus-sharePatent US7892166 - Medical instrument including a catheter having a catheter stiffener and method for using
