Temporary intraluminal filter guidewire and methods of use
First Claim
1. A filter guidewire for capturing embolic material generated during treatment of a lesion in a vessel of a patient, the filter guidewire comprising:
- an elongate core wire having proximal and distal ends;
an elongate tubular shaft slidably disposed along the core wire, the shaft including an elongate proximal portion and a short distal portion, the distal portion being more flexible than the proximal portion;
a generally tubular filter mounted coaxially about the core wire, the filter having a distal end fixed to the core wire distal end and a proximal end fixed to the shaft distal portion, wherein relative displacement of the filter ends associated with longitudinal displacement between the tubular shaft and the core wire causes transformation of the filter between a collapsed configuration and a deployed configuration; and
a transition sleeve fixed about the core wire distal end, the sleeve being slidably disposed within the shaft distal portion and extending distally there from.
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Accused Products
Abstract
The present invention is a temporary intraluminal filter guidewire for use during interventional procedures, such as angioplasty or stent deployment. A braided filter is mounted near the distal end of a steerable guidewire, which guides a therapeutic catheter. An actuator rod slides over the guidewire and is removably connected to the filter. The rod controls relative displacement of the filter ends, causing transformation of the filter between a deployed configuration and a collapsed configuration. Wire having enhanced radiopacity is included in the filter to provide visualization under fluoroscopy.
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Citations
12 Claims
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1. A filter guidewire for capturing embolic material generated during treatment of a lesion in a vessel of a patient, the filter guidewire comprising:
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an elongate core wire having proximal and distal ends; an elongate tubular shaft slidably disposed along the core wire, the shaft including an elongate proximal portion and a short distal portion, the distal portion being more flexible than the proximal portion; a generally tubular filter mounted coaxially about the core wire, the filter having a distal end fixed to the core wire distal end and a proximal end fixed to the shaft distal portion, wherein relative displacement of the filter ends associated with longitudinal displacement between the tubular shaft and the core wire causes transformation of the filter between a collapsed configuration and a deployed configuration; and a transition sleeve fixed about the core wire distal end, the sleeve being slidably disposed within the shaft distal portion and extending distally there from. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A filter guidewire comprising:
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an elongate core wire having proximal and distal ends; an elongate tubular shaft slidably disposed about the core wire, the shaft including an elongate proximal portion and a relatively short distal portion, the distal portion being more flexible than the proximal portion; a generally tubular filter mounted coaxially about the core wire, the filter having a filter distal end fixed to the core wire distal end and a filter proximal end fixed to the shaft distal portion; and a transition sleeve fixed about the core wire and spanning a distal end of the shaft to provide a gradual transition in overall stiffness of the filter guidewire adjacent the distal end of the shaft. - View Dependent Claims (11, 12)
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Specification