Medical device guidewire with a position sensor

• US 10,028,705 B2
• Filed: 05/30/2014
• Issued: 07/24/2018
• Est. Priority Date: 12/29/2010
• Status: Active Grant

• Current Assignee: St. Jude Medical International Holding SARL (Abbott Laboratories Incorporated)
• Original Assignee: ST JUDE MEDICAL INTERNATIONAL HOLDING S. R.L.
• Inventors: Meller, Nimrod, Sela, Ran, Seter, Dan, Sobe, Lior
• Primary Examiner(s): DOUGHERTY, SEAN PATRICK
• Application Number:
  US14/292,088
• Publication Number:
  US 20140276226A1
• Time in Patent Office: 1,516 Days
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 5/062 using magnetic field
• CPC Class Codes: A61B 5/6851 Guide wires
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61M 2025/0166 Sensors, electrodes or the like for guiding the catheter to a target zone, e.g. image guided or magnetically guided
• CPC Class Codes: A61M 2025/09075 having a core without a coil possibly combined with a sheath
• CPC Class Codes: A61M 2025/09083 having a coil around a core
• CPC Class Codes: A61M 2025/09091 where a sheath surrounds the coil at the distal part
• CPC Class Codes: A61M 2025/09108 Methods for making a guide wire
• CPC Class Codes: A61M 2025/09166 having radio-opaque features
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

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.

Claims

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.