Micromachined composite guidewire structure with anisotropic bending properties
First Claim
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1. A medical device, comprising:
- an elongate core member having a proximal portion and a distal portion;
wherein the distal portion includes a distal end and a flattened region disposed proximally of the distal end, the flattened region having a height and a width, the width being twice or more as large as the height;
a tubular member disposed over the distal portion, the tubular member having a plurality of slots formed therein; and
wherein the flattened region of the core member individually has anisotropic bending properties and includes at least one preferred bending direction, wherein the tubular member individually has anisotropic bending properties and includes at least one preferred bending direction, and wherein the tubular member is disposed over the distal portion such that the preferred bending direction of the flattened region of the core member is aligned with the preferred bending direction of the tubular member.
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Abstract
Medical devices and methods for making and using the same. An example medical device may include an elongate core member having a proximal portion and a distal portion. The distal portion may include a distal end and a flattened region. The flattened region may be disposed proximally of the distal end. The flattened region may have a height and a width. The width may be twice or more as large as the height. A tubular member may be disposed over the distal portion. The tubular member may have a plurality of slots formed therein.
402 Citations
14 Claims
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1. A medical device, comprising:
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an elongate core member having a proximal portion and a distal portion; wherein the distal portion includes a distal end and a flattened region disposed proximally of the distal end, the flattened region having a height and a width, the width being twice or more as large as the height; a tubular member disposed over the distal portion, the tubular member having a plurality of slots formed therein; and wherein the flattened region of the core member individually has anisotropic bending properties and includes at least one preferred bending direction, wherein the tubular member individually has anisotropic bending properties and includes at least one preferred bending direction, and wherein the tubular member is disposed over the distal portion such that the preferred bending direction of the flattened region of the core member is aligned with the preferred bending direction of the tubular member. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A guidewire, comprising:
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an elongate shaft having a preferred bending direction, the shaft including a core member and a tubular member having a plurality of slots formed therein; wherein the core member includes a hinge region disposed proximally from a distal end of the core member and a distal region extending between the hinge region and the distal end of the core member, the hinge region having a height and a width, the width being larger than the height; wherein the distal region of the core member has a substantially circular cross-sectional shape; a tip member attached to the distal end of the core member; and wherein the preferred bending direction extends through the height of the hinge region. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for manufacturing a medical device, the method comprising:
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providing an elongate core member having a proximal portion and a distal portion; flattening a region of the distal portion to define a flattened region, the flattened region having a height and a width, the width being twice or more as large as the height; wherein the distal portion of the core member has a distal end and wherein the flattened region is disposed proximally of the distal end and between the flattened region and the distal end the core member has a substantially circular cross-sectional shape; disposing a tubular member over the distal portion, the tubular member having a plurality of slots formed therein; and attaching a tip member to the distal end of the distal portion of the core member.
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Specification