A medical device shaft for connection with a handle and for insertion within a body includes an elongated, deflectable shaft having a proximal shaft portion, an intermediate shaft portion, and a distal shaft portion. The elongated, deflectable shaft includes a transition in stiffness from the proximal...http://www.google.ca/patents/US20040176741?utm_source=gb-gplus-sharePatent US20040176741 - Torqueable and deflectable medical device shaft
