Temporary intraluminal filter guidewire
First Claim
1. A temporary filter device comprising:
- an elongate proximal guidewire shaft having a distal end;
a relatively short distal guidewire shaft having a proximal end and being disposed distal to and coaxially aligned with the proximal shaft;
a generally tubular filter mounted coaxially about the proximal and distal guidewire shafts, the filter having a tapered distal end fixed adjacent the proximal end of the distal shaft and a tapered proximal end fixed adjacent the distal end of the proximal shaft, wherein relative longitudinal movement between the distal and proximal ends of the filter accompanies a transformation of the filter between a collapsed configuration and an open configuration;
an actuator slidably disposed along the proximal guidewire shaft; and
at least one link slidably disposed through at least one opening near the filter proximal end and connecting the actuator to the distal end of the filter.
1 Assignment
0 Petitions
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. In several embodiments, the guidewire distal to the filter has a fixed tip length. Other embodiments of the invention include a mechanism for damping longitudinal movement between the distal and proximal ends of the filter.
-
Citations
22 Claims
-
1. A temporary filter device comprising:
-
an elongate proximal guidewire shaft having a distal end;
a relatively short distal guidewire shaft having a proximal end and being disposed distal to and coaxially aligned with the proximal shaft;
a generally tubular filter mounted coaxially about the proximal and distal guidewire shafts, the filter having a tapered distal end fixed adjacent the proximal end of the distal shaft and a tapered proximal end fixed adjacent the distal end of the proximal shaft, wherein relative longitudinal movement between the distal and proximal ends of the filter accompanies a transformation of the filter between a collapsed configuration and an open configuration;
an actuator slidably disposed along the proximal guidewire shaft; and
at least one link slidably disposed through at least one opening near the filter proximal end and connecting the actuator to the distal end of the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A temporary filter device comprising:
-
an elongate proximal core wire having a distal end;
a distal core wire having a proximal portion, the distal core wire being disposed distal to and coaxially aligned with the proximal core wire;
a tubular segment having a distal end, the tubular segment being fixedly disposed about the distal end of the proximal core wire and extending distally there from to slidably engage the proximal portion of the distal core wire;
a generally tubular filter mounted about the distal core wire and the tubular segment, the filter having a tapered distal end fixed to the distal core wire and a tapered proximal end fixed to the tubular segment, wherein relative longitudinal movement between the distal and proximal ends of the filter accompanies a transformation of the filter between a collapsed configuration and an open configuration;
an actuator slidably disposed along the proximal core wire proximally of the filter; and
a link slidably disposed through an opening near the filter proximal end and connecting the actuator to the distal end of the filter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22)
-
-
18. A device for temporarily filtering bodily fluid, the device comprising:
-
an elongate flexible guidewire having a proximal end and distal region having a flexible tubular element fixed there about;
a generally tubular, self-expanding filter mounted coaxially about the guidewire, the filter having distal and proximal tapered ends slidingly disposed about the guidewire, wherein relative longitudinal movement between the distal and proximal ends of the filter accompanies a transformation of the filter between a closed configuration and an open configuration;
a stop element fixed to the guidewire distal region, the stop element being disposed between and limiting longitudinal movement of the distal and proximal ends of the filter;
an actuator fixed to the proximal end of the filter, the actuator forming an annular space around the guidewire and being slidably disposed there along;
an elongate hollow rod having a lumen and a distal end releasably engageable with the actuator, the hollow rod being slidably disposed about the guidewire and being operable, when the distal end of the rod is engaged with the actuator, to draw the proximal end of the filter in a proximal direction; and
a mechanism for damping the relative longitudinal movement between the distal and proximal ends of the filter.
-
Specification