Methods and apparatus for true lumen re-entry
AssigneeTruVue, Inc.
InventorsKhaldoon ALASWAD, Tim A. FISCHELL
Life of this patent
Estimating the term…
Abstract
A catheter for facilitating re-entry of a re-entry wire into a true lumen or into any desired region of a blood vessel may have an elongate shaft with a first lumen. A distal port and a first proximal port are fluidly coupled with the first lumen. A wire re-entry port is adjacent the distal end of the elongate shaft. The wire re-entry port has a re-entry axis. An ultrasound transducer on the catheter is configured to produce an image the blood vessel, and has a central axis that allows visualization of the re-entry wire as it exits the re-entry port and re-enters the true lumen. This allows the operator to ensure that the re-entry wire re-enters the true lumen in a desired location and does not damage the vessel.
Claims21
-34. (canceled)
A method for delivering a re-entry wire into a true lumen of an occluded blood vessel, the method comprising:
- passing a guidewire through the true lumen of the blood vessel and into a subintimal space that is adjacent or distal to an obstructive plaque within the blood vessel;
- advancing a re-entry catheter distally over the guidewire so that the re-entry catheter enters the subintimal space and passes under the obstructive plaque;
- imaging laterally from the re-entry catheter to confirm that the re-entry catheter has advanced distal to the obstructive plaque to select a re-entry position;
- extending a re-entry wire through the re-entry catheter, laterally out of the re-entry catheter and into the true lumen of the occluded blood vessel distal to the obstructive plaque;
- and
- removing the re-entry catheter proximally, leaving the re-entry wire in position.
A method for delivering a re-entry wire into a true lumen of an occluded blood vessel, the method comprising:
- passing a guidewire through the true lumen of the blood vessel and into a subintimal space that is adjacent or distal to an obstructive plaque within the blood vessel;
- advancing a re-entry catheter distally over the guidewire so that the re-entry catheter enters the subintimal space and passes under the obstructive plaque;
- imaging laterally from the re-entry catheter using an ultrasound transducer on the re-entry catheter to confirm that the re-entry catheter has advanced distal to the obstructive plaque to select a re-entry position;
- extending a re-entry wire through the re-entry catheter, laterally out of the re-entry catheter and into the true lumen of the occluded blood vessel distal to the obstructive plaque while imaging laterally from the re-entry catheter;
- and
- removing the re-entry catheter proximally, leaving the re-entry wire in position.
A method for delivering a re-entry wire into a true lumen of an occluded blood vessel, the method comprising:
- passing a guidewire through the true lumen of the blood vessel and into a subintimal space that is adjacent or distal to an obstructive plaque within the blood vessel;
- advancing a re-entry catheter distally over the guidewire so that the re-entry catheter enters the subintimal space and passes under the obstructive plaque;
- imaging laterally from the re-entry catheter using an ultrasound transducer on the re-entry catheter to confirm that the re-entry catheter has advanced distal to the obstructive plaque to select a re-entry position;
- extending a re-entry wire through the re-entry catheter, laterally out of the re-entry catheter and into the true lumen of the occluded blood vessel distal to the obstructive plaque while imaging laterally from the re-entry catheter;
- removing the re-entry catheter proximally;
- positioning an angioplasty catheter comprising a balloon over the re-entry wire so that the balloon extend at least partially into the subintimal pocket, and expanding the balloon to re-center the angioplasty catheter in the true lumen;
- and
- deploying a stent to support the vessel wall.
Dependencies are inferred from the claim text.