An intraluminal catheter which provides access to distal locations within a patient's body lumen and which is provided with a flexible distal section having an inner lining, an outer jacket or coating and a helical coil between the lining and jacket. The distal section of the catheter is quite flexible...http://www.google.com.au/patents/US6059770?utm_source=gb-gplus-sharePatent US6059770 - Catheter providing intraluminal access
