Guidewire apparatus for temporary distal embolic protection
First Claim
Patent Images
1. A guidewire apparatus comprising:
- an elongate hollow shaft having an inner wall and proximal and distal ends;
a core wire movably disposed within the shaft and having a distal end extending there from;
a generally tubular protection element having a distal end fixed adjacent the core wire distal end and a proximal end fixed adjacent the shaft distal end, wherein relative longitudinal movement between the distal and proximal ends of the protection element accompanies a transformation of the protection element between a collapsed configuration and an expanded configuration; and
a liner interfitted between the core wire and the shaft inner wall, the liner having an inner surface and an outer surface, wherein at least one of the surfaces has a low coefficient of friction.
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Accused Products
Abstract
A guidewire apparatus for use during percutaneous catheter interventions, such as angioplasty or stent deployment. A protection element comprising a filter or an occluder is mounted near the distal end of a steerable guidewire, which guides a therapeutic catheter. The guidewire apparatus comprises a hollow shaft movably disposed about a core wire and, optionally, a slippery liner interfitted there between. The shaft and core wire control relative displacement of the ends of the protection element, causing transformation of the protection element between a deployed configuration and a collapsed configuration.
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Citations
46 Claims
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1. A guidewire apparatus comprising:
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an elongate hollow shaft having an inner wall and proximal and distal ends;
a core wire movably disposed within the shaft and having a distal end extending there from;
a generally tubular protection element having a distal end fixed adjacent the core wire distal end and a proximal end fixed adjacent the shaft distal end, wherein relative longitudinal movement between the distal and proximal ends of the protection element accompanies a transformation of the protection element between a collapsed configuration and an expanded configuration; and
a liner interfitted between the core wire and the shaft inner wall, the liner having an inner surface and an outer surface, wherein at least one of the surfaces has a low coefficient of friction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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17. A guidewire apparatus comprising:
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an elongate hollow shaft having an inner wall and a distal portion having a distal end;
a core wire movably disposed within the shaft and having a distal end extending there from and a flexible tip member fixed about the core wire distal end;
a transition sleeve having a distal end and being slidably disposed about the shaft distal portion and extending distally there from to surround a proximal portion of the tip member;
a generally tubular protection element having a distal end fixed about the transition sleeve and a proximal end fixed to the shaft proximally of the shaft distal portion, wherein relative longitudinal movement between the distal and proximal ends of the protection element accompanies a transformation of the protection element between a collapsed configuration and an expanded configuration; and
a liner interfitted between the core wire and the hollow shaft, the liner having inner and outer surfaces, wherein at least one of the surfaces has a low coefficient of friction.
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32. A guidewire apparatus comprising:
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an elongate hollow shaft having a length, an inner wall and a distal portion;
a liner disposed within substantially the length of the hollow shaft and having inner and outer surfaces, wherein at least one of the surfaces has a low coefficient of friction;
a core wire having separate distal and proximal sections slidably disposed within the liner, the core wire proximal section being adapted to abut and push the core wire distal section distally within the liner, the distal core wire section having a distal end extending from the shaft distal portion and having a flexible tip member fixed there about;
a transition sleeve being slidably disposed about and extending from the shaft distal portion, the sleeve having a distal end coupled about the tip member; and
a generally tubular, self-expanding protection element having a distal end coupled about the transition sleeve and a proximal end coupled to the shaft proximally of the shaft distal portion, wherein relative longitudinal movement between the distal and proximal ends of the protection element accompanies a transformation of the protection element between a collapsed configuration and an expanded configuration. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A guidewire apparatus comprising:
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an elongate hollow shaft having an inner wall and proximal and distal ends;
a core wire having a portion movably disposed within the hollow shaft and having a distal end extending there from, the portion of the core wire within the hollow shaft having a distal segment and a first proximal segment, the diameter of the first proximal segment being larger than the diameter of the core wire distal segment; and
a generally tubular protection element having a distal end fixed adjacent the core wire distal end and a proximal end fixed adjacent the shaft distal end, wherein relative longitudinal movement between the distal and proximal ends of the protection element accompanies a transformation of the protection element between a collapsed configuration and an expanded configuration. - View Dependent Claims (43, 44, 45, 46)
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Specification