Inner and outer telescoping catheter delivery system
First Claim
1. A catheter assembly for cannulating the coronary sinus of a patient'"'"'s heart from the right atrium, comprising:
- an outer catheter comprising an open lumen and a pre-formed distal end having a plurality of curved sections and a generally straight distal tip section, all of the curved sections in the pre-formed distal end being oriented so as to assume the same general direction of curvature, the generally straight distal tip section extending from a distal-most curved section in a direction defined by the curvature of the distal-most curved section;
an inner catheter comprising an open lumen and a pre-formed distal end having an open distal tip, the pre-formed distal end including at least two adjacent longitudinal sections of varying stiffness and a stiffness transition region between the at least two adjacent longitudinal sections of varying stiffness, at least a portion of the inner catheter including a braid covered by an exterior jacket, the inner catheter movably disposed within the open lumen of the outer catheter, the pre-formed distal end of the inner catheter being more flexible than the pre-formed distal end of the outer catheter, and the pre-formed distal end of the inner catheter extendable beyond the preformed distal end of the outer catheter; and
a proximal mechanism for axially rotating the outer catheter relative to the inner catheter and longitudinally translating the inner catheter relative to the outer catheter, an orientation of the pre-formed distal end of the outer catheter relative to the pre-formed distal end of the inner catheter modified by relative axial rotation and relative longitudinal translation between the outer and inner catheters such that one or both of a bend radius and a bend angle of the pre-formed distal end of the outer catheter is modified and a distal end of the catheter assembly can assume a selectable plurality of multidimensional shapes appropriate for accessing the coronary sinus.
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Accused Products
Abstract
A catheter assembly employs an outer catheter with a pre-formed distal end and an open lumen. An inner catheter having an open lumen and a pre-formed distal end is movably disposed within the outer catheter. Relative rotation and extension of the inner and outer catheters provides the distal end of the catheter assembly with an adjustable range of two- and three-dimensional shapes. The inner catheter can include sections of varying stiffness, such that extension of the inner catheter within the outer catheter modifies the shape of the outer catheter'"'"'s pre-formed distal end. The adjustable shaping of the catheter assembly'"'"'s distal tip provides an improved system for locating and cannulating cardiac venous structures, particularly the coronary sinus via the right atrium.
245 Citations
26 Claims
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1. A catheter assembly for cannulating the coronary sinus of a patient'"'"'s heart from the right atrium, comprising:
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an outer catheter comprising an open lumen and a pre-formed distal end having a plurality of curved sections and a generally straight distal tip section, all of the curved sections in the pre-formed distal end being oriented so as to assume the same general direction of curvature, the generally straight distal tip section extending from a distal-most curved section in a direction defined by the curvature of the distal-most curved section; an inner catheter comprising an open lumen and a pre-formed distal end having an open distal tip, the pre-formed distal end including at least two adjacent longitudinal sections of varying stiffness and a stiffness transition region between the at least two adjacent longitudinal sections of varying stiffness, at least a portion of the inner catheter including a braid covered by an exterior jacket, the inner catheter movably disposed within the open lumen of the outer catheter, the pre-formed distal end of the inner catheter being more flexible than the pre-formed distal end of the outer catheter, and the pre-formed distal end of the inner catheter extendable beyond the preformed distal end of the outer catheter; and a proximal mechanism for axially rotating the outer catheter relative to the inner catheter and longitudinally translating the inner catheter relative to the outer catheter, an orientation of the pre-formed distal end of the outer catheter relative to the pre-formed distal end of the inner catheter modified by relative axial rotation and relative longitudinal translation between the outer and inner catheters such that one or both of a bend radius and a bend angle of the pre-formed distal end of the outer catheter is modified and a distal end of the catheter assembly can assume a selectable plurality of multidimensional shapes appropriate for accessing the coronary sinus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A catheter assembly, comprising:
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an outer catheter comprising an open lumen and a pre-formed distal end having a plurality of curved sections and a generally straight distal tip section, all of the curved sections in the pre-formed distal end being oriented so as to assume the same general direction of curvature, the generally straight distal tip section extending from a distal-most curved section in a direction defined by the curvature of the distal-most curved section; an inner catheter having an open lumen, a pre-formed distal end having an open distal tip, at least two adjacent longitudinal sections of varying stiffness, and a stiffness transition region between the at least two adjacent longitudinal sections of varying stiffness, at least a portion of the inner catheter including a braid covered by an exterior jacket, the inner catheter movably disposed within the open lumen of the outer catheter, the pre-formed distal end of the inner catheter being more flexible than the pre-formed distal end of the outer catheter, and the pre-formed distal end of the inner catheter extendable beyond the preformed distal end of the outer catheter; and a proximal mechanism for axially rotating the outer catheter relative to the inner catheter and longitudinally translating the inner catheter relative to the outer catheter, an orientation of the pre-formed distal end of the outer catheter relative to the pre-formed distal end of the inner catheter modified by relative axial rotation and relative longitudinal translation between the outer and inner catheters and a shape of the pre-formed distal end of the outer catheter changed by relative longitudinal translation between the outer and inner catheters thereby changing orientation of the sections of varying stiffness of the inner catheter relative to the pre-formed distal end of the outer catheter, such that a distal end of the catheter assembly can assume a selectable plurality of multidimensional shapes. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification