Guidewire for crossing occlusions or stenoses
Systems and methods for crossing stenosis, partial occlusions, or complete occlusions within a body lumen. The systems generally include an elongate member such as a hollow guidewire that houses a rotatable and translatable drive shaft. The drive shaft typically has a distal portion that is advanced to create a path in the occlusive material that is large enough to allow the hollow guidewire to cross the occlusive material.
1. A guidewire system for passing through a stenosis in a blood vessel, said guidewire comprising:
a hollow body including a coil and having a proximal end, a distal end, and an axial lumen therethrough from the proximal end of the hollow body to a distal opening at the distal end of the hollow body;
a reinforcing wire connected to an axial inner surface of the coil, wherein the reinforcing wire is reshapeable allowing a user to deflect the distal end without impeding the lumen through the hollow body; and
a rotatable drive shaft within the axial lumen of the hollow body and exiting through the distal opening at the distal end of the hollow body to a distal tip sized to create a path radius at least as large as a radius of the distal end of the hollow body.
2. A guidewire system as in claim 1 , wherein the reinforcing wire is a flattened strip of stainless steel.
3. A guidewire system as in claim 1 , wherein the reinforcing wire is soldered to the coil.
4. A guidewire system, as in claim 3 , wherein the reinforcing wire is soldered to a distal end of the coil.
5. A guidewire system, as in claim 1 , wherein the coil extends the entire length of the hollow body.
6. A guidewire system as in claim 5 , wherein the coil is a first coil and the hollow body comprises a second coil proximal of the first coil.