| 摘要 |
An articulation system for catheter steering and selective positioning of the catheter distal tip includes an articulation segment having a cylindrically shaped wall that is attached between a tip member and a catheter tube. The cylindrically shaped wall defines a longitudinal axis and surrounds a centra l lumen. The wall of the articulation segment is formed with a first section made of a first material having flexure! modulus, M1, -and a second section made of a second material having flexural modules, M2, with M2 being larger than M1 (M2 > M1). One end of a control wire is attached to the tip membe r, while the control wire itself extends from the tip member, through the lumen of the articulation segment and through the catheter tube. The sections are arranged to cause the tip member to deflect in a pre-selected plane in response to axial movements of the control wire.
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