Temporary intraluminal filter guidewire and methods of use
First Claim
Patent Images
1. A temporary filter device comprising:
- an elongate flexible guidewire having a proximal end and a flexible tubular element fixed about a guidewire distal region;
a generally tubular filter mounted coaxially about the guidewire, the filter having a tapered distal end slidingly disposed about the guidewire distal region and a tapered proximal end fixed about the guidewire, the filter including an opening near the filter proximal end, wherein relative longitudinal movement between the filter ends accompanies transformation of the filter between a collapsed configuration and a deployed configuration;
a tubular actuator slidably disposed along the guidewire, the actuator including a proximal end and a distal end disposed proximally of the filter; and
a link slidably disposed through the opening and connecting the actuator distal end to the filter distal end.
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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
18 Claims
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1. A temporary filter device comprising:
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an elongate flexible guidewire having a proximal end and a flexible tubular element fixed about a guidewire distal region;
a generally tubular filter mounted coaxially about the guidewire, the filter having a tapered distal end slidingly disposed about the guidewire distal region and a tapered proximal end fixed about the guidewire, the filter including an opening near the filter proximal end, wherein relative longitudinal movement between the filter ends accompanies transformation of the filter between a collapsed configuration and a deployed configuration;
a tubular actuator slidably disposed along the guidewire, the actuator including a proximal end and a distal end disposed proximally of the filter; and
a link slidably disposed through the opening and connecting the actuator distal end to the filter distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A temporary filter device comprising:
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an elongate flexible guidewire having a proximal end and a flexible tubular element fixed about a guidewire distal region;
a braided tubular filter mounted coaxially about the guidewire, the filter having a tapered distal end slidingly disposed about the guidewire distal region and a tapered proximal end fixed about the guidewire, the filter including an opening near the filter proximal end, wherein relative longitudinal movement between the filter ends accompanies transformation of the filter between a collapsed configuration and a deployed configuration;
a tubular actuator slidably disposed along the guidewire, the actuator including a proximal end and a distal end disposed proximally of the filter; and
a link slidably disposed through the opening and connecting the actuator distal end to the filter distal end. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A temporary filter device comprising:
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an elongate flexible guidewire having a proximal end, a distal end, and a flexible tubular element fixed about a guidewire distal region;
a generally tubular filter mounted coaxially about the guidewire, the filter having a tapered distal end slidingly disposed near the distal end of the guidewire and a tapered proximal end fixed to the guidewire, the filter including an opening adjacent the filter proximal end;
an actuator mechanism slidably disposed about the guidewire and extending slidably through the opening to connect with the filter distal end, wherein proximal displacement of the guidewire relative to the actuator mechanism separates the filter proximal and distal ends, causing transformation of the filter from a deployed configuration to a collapsed configuration.
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18. A method of capturing embolic material generated during a vascular intervention at a treatment site within a patient, the method including the steps of:
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providing a filter guidewire including a guidewire and a self-expanding filter assembly having a tapered filter distal end slidingly disposed adjacent a guidewire distal end and a tapered filter proximal end fixed to the guidewire, the filter guidewire further including an actuator mechanism slidably disposed along the guidewire proximal to the filter and connected to the filter distal end;
collapsing the filter assembly by advancing a hollow rod distally along the guidewire until the rod engages with and distally displaces the actuator mechanism;
introducing the filter guidewire into and through the patient'"'"'s vasculature until the filter assembly is located downstream of the treatment site;
allowing the filter assembly to expand by withdrawing the rod from engagement with the actuator mechanism and removing the rod from the patient;
advancing a treatment catheter over the guidewire to position the catheter within the treatment site;
performing the vascular intervention with the treatment catheter and capturing embolic material that may be generated thereby;
collapsing the filter assembly by advancing the treatment catheter distally along the filter guidewire until the catheter engages with and distally displaces the actuator mechanism;
withdrawing the filter guidewire and the catheter together while maintaining distal displacement of the actuator mechanism.
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Specification