Medical device guidewire with a position sensor
A guidewire for a medical device is disclosed. In one embodiment, the guidewire includes a corewire having a proximal end portion and a distal end portion, an elongate shroud disposed about the corewire, the shroud having a distal end, and a plug coupled with the distal end portion of the corewire and the distal end of the shroud, the plug having a distal, non-traumatic tip portion, an interior between the corewire and the shroud being configured to receive a sensor.
1. An elongate medical device comprising:
a corewire having a distal end portion and defining a longitudinal axis;
an elongate shroud disposed radially outward from said corewire, said shroud having a distal end portion;
a plug coupled with said distal end portion of said corewire and said distal end portion of said shroud;
a sensor disposed radially-outward of said corewire and radially-inward of said shroud, wherein said sensor comprises:
a core defining a lumen extending axially, said corewire extending through said lumen; and
a coil disposed about said core; and
an electrically-insulating layer disposed between said corewire and said sensor.
2. The elongate medical device of claim 1 , wherein said core comprises a magnetically-permeable material.
3. The elongate medical device of claim 1 , wherein said sensor is distal of a proximal end of said shroud.
4. The elongate medical device of claim 1 , wherein a distal end of said sensor is coupled to said plug.
5. The elongate medical device of claim 1 , wherein a distalmost portion of said sensor is distal of a distalmost portion of said shroud.
6. The elongate medical device of claim 1 , further comprising a sheath between said sensor and said shroud.
7. The elongate medical device of claim 6 , wherein said sheath comprises a polymer shrink tube, wherein said sensor is disposed within said polymer shrink tube.
8. An elongate medical device comprising:
a corewire having a distal end portion and defining a longitudinal axis;
a plug coupled with said distal end portion of said corewire, said plug having a distal, non-traumatic tip portion;
a sensor disposed radially outward of said corewire, wherein said sensor comprises:
a core having a lumen axially extending therethrough, said corewire extending through said lumen; and
a coil disposed about said core; and
an elongate protective structure disposed radially outward of said corewire and radially outward of said sensor, a distal end of said elongate protective structure coupled with said plug, a portion of said elongate protective structure disposed axially proximal of a proximalmost portion of said sensor;
wherein a distalmost portion of said sensor is distal of a distalmost portion of said elongate protective structure.
9. The elongate medical device of claim 8 , wherein said elongate protective structure is a spring.
10. The elongate medical device of claim 8 , wherein said elongate protective structure is a polymer coating.
11. The elongate medical device of claim 10 , further comprising a spring disposed radially-inward of said polymer coating.
12. The elongate medical device of claim 8 , wherein said elongate protective structure is the radially-outermost layer of at least a portion of the elongate medical device.
13. An elongate medical device comprising:
a corewire having a distal end portion and defining a longitudinal axis;
a plug coupled with said distal end portion of said corewire, said plug having a distal, non-traumatic tip portion;
a sensor disposed radially-outward of said corewire, wherein said sensor comprises a coil and defines a lumen extending axially, said corewire extending through said lumen;
an electrically-insulative layer disposed between said corewire and said sensor core so as to electrically insulate said corewire from said sensor.
14. The elongate medical device of claim 13 , wherein said electrically-insulative layer comprises polymer or adhesive.
15. The elongate medical device of claim 13 , further comprising a spring disposed radially outward from said corewire.
16. The elongate medical device of claim 15 , wherein said spring is disposed radially outward of said sensor.
17. The elongate medical device of claim 13 , at least one electrical wire connected to said sensor.
18. The elongate medical device of claim 13 , further comprising an elongate shroud disposed radially outward from said corewire and said sensor.