Magnetic guidewire for lesion crossing
AssigneeStereotaxis, Inc.
InventorRaju Viswanathan
Life of this patent
Estimating the term…
Abstract
The invented guidewire relates to improvements in a magnetically navigable medical guidewire to enable passage through an occluded or partially occluded vessel. The guidewire comprises an elongate wire having a proximal end and a distal end, wherein the distal end further comprises a magnetically responsive element and a helical thread formed on the tip. The distal end of the guidewire may be preferably aligned substantially in the direction of an applied magnetic field, after which the proximal end of the guidewire may be torqued to rotate the threaded tip while remaining aligned with the applied magnetic field and cause the tip to screw through the blockage in the occluded vessel.
Claims39
An improved magnetically navigable medical guidewire having a proximal end and a distal end, and incorporating at least one magnetically responsive element, the improvement comprising:
- a threaded tip section at the distal tip of the guidewire, wherein the threaded tip comprises at least one complete thread turn over a predetermined thread length.
A magnetically navigable medical guidewire, comprising:
- an elongate wire having a proximal end, and a distal end;
- a hollow cylindrical member disposed on the distal end of the elongate wire;
- a magnetically responsive element disposed within said hollow cylinder;
- and
- a helical-threaded end distally placed at the distal end of the cylinder so as to seal the magnetically responsive element inside the hollow cylinder, wherein the helical thread comprises at least one complete thread turn over a predetermined thread length.
A magnetically navigable medical guidewire, comprising:
- an elongate wire having a proximal end, and a distal end;
- a cylindrical member disposed on the distal end of the elongate wire, wherein the cylindrical member has a hollow section and a threaded end comprising at least one complete thread turn over a predetermined thread length;
- and
- a magnetically responsive element disposed within the hollow section of the cylindrical member.
A magnetically navigable medical guidewire, comprising:
- an elongate wire having a proximal end, and a distal end;
- at least one magnetically responsive element disposed on the distal end of the elongate wire;
- and
- a threaded tip section located at the distal end of the guidewire, wherein the threaded tip comprises at least one complete thread turn over a predetermined thread length.
A method of navigating a guidewire past an obstruction in a body lumen the method comprising:
- positioning the distal end of a guidewire having a threaded distal tip and at least one magnetically responsive element adjacent the distal end proximal to the obstruction;
- apply a magnetic field to orient and rotationally stabilize the distal tip;
- rotating the proximal end of the guidewire to screw the threaded tip through the obstruction.
Dependencies are inferred from the claim text.