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 device for creating or enlarging a passageway in occlusive material in a body lumen, comprising:
a flexible hollow guidewire having a proximal end, a distal end, and a lumen extending therethrough;
a drive shaft extending through the lumen of the hollow guidewire, the drive shaft rotatable relative to the hollow guidewire;
a distal tip located at a distal end of the drive shaft and rotatable with the drive shaft, the distal tip configured to remove occlusive material from the body lumen;
a housing coupled to the proximal end of the flexible hollow guidewire;
a motor arranged in the housing, the motor coupled to the drive shaft to provide rotational motion to the drive shaft; and
a control system located proximal of the housing with a wire extending between a proximal end of the housing and a distal end of the control system to power the motor.
2. The device of claim 1 , wherein the wire electrically couples the motor to a power supply.
3. The device of claim 2 , wherein the power supply is located proximal of the proximal end of the housing.
4. The device of claim 1 , wherein the hollow guidewire includes a radiopaque section proximate the distal end of the hollow guidewire.
5. The device of claim 4 , wherein the radiopaque section includes a coil member.
6. The device of claim 5 , wherein the coil member is secured to a proximal tube of the hollow guidewire.
7. The device of claim 6 , wherein the proximal tube extends proximal of a proximal end of the coil member.
8. The device of claim 6 , wherein the proximal tube extends to the housing.
9. The device of claim 6 , wherein the coil member surrounds a portion of the proximal tube.
10. The device of claim 1 , wherein the hollow guidewire has an outer diameter of between 0.009 inches and 0.040 inches.
11. The device of claim 1 , wherein the housing and motor are removably coupled to the hollow guidewire and the drive shaft, respectively.
12. The device of claim 1 , wherein the distal tip is positioned distal of the distal end of the hollow guidewire.
13. The device of claim 12 , wherein the distal tip has an outer diameter greater than an outer diameter of the drive shaft.
14. A device for creating or enlarging a passageway in occlusive material in a body lumen, comprising:
a flexible hollow guidewire having a proximal end, a distal end, and a lumen extending therethrough, the hollow guidewire including a proximal tube and a coil member secured to a distal portion of the proximal tube;
a drive shaft extending through the lumen of the hollow guidewire, the drive shaft rotatable relative to the hollow guidewire;
a distal tip located at a distal end of the drive shaft and rotatable with the drive shaft, the distal tip configured to remove occlusive material from the body lumen;
a housing coupled to the proximal tube at the proximal end of the flexible hollow guidewire;
a motor arranged in the housing, the motor coupled to the drive shaft to provide rotational motion to the drive shaft; and
a control system located proximal of the housing with a wire extending between a proximal end of the housing and a distal end of the control system;
wherein the wire electrically couples the motor to a power supply located proximal of the proximal end of the housing to power the motor.
15. The device of claim 14 , wherein the distal tip is positioned distal of the distal end of the hollow guidewire.
16. The device of claim 14 , wherein the distal tip has an outer diameter greater than an outer diameter of the drive shaft.
17. The device of claim 16 , wherein the distal tip has an outer diameter greater than or equal to an outer diameter of the hollow guidewire.
18. The device of claim 14 , wherein the coil member surrounds a portion of the proximal tube.
19. The device of claim 14 , wherein the hollow guidewire has an outer diameter of between 0.009 inches and 0.040 inches.
20. The device of claim 14 , wherein the housing and motor are removably coupled to the hollow guidewire and the drive shaft, respectively.