Patent ID: 6863668
Filing Date: 2005-03-08
Classification: A61B,A61M

Abstract:
1. A flexible articulation device having a generally even bend radius, wherein the device is adapted for attachment to a medical insertion instrument, the device comprising: a first elongated tubular member having a proximal end and a distal end and a middle portion along its length therebetween, the first elongated tubular member also having, a plurality of ribs extending radially outward therefrom, adjacent ribs defining bending segments therebetween that are not all equal, wherein at least one of the bending segments adjacent the proximal end has a moment of inertia that is greater than the moments of inertia of the bending segments in the middle portion to restrict the magnitude of deflection of the proximal end of the articulation device relative to the middle portion; a second elongated tubular member axially disposed within the first tubular member and extending along the length thereof; and a flexible push/pull member extending along and joined to the articulation device near the distal end of the first tubular member such that the articulation device is selectively deflectable along the first and second elongated tubular members into a plurality of stationary, predetermined positions within the human body.