GUIDEWIRE TIP CONSTRUCTION

• US 20060235337A1
• Filed: 06/26/2006
• Published: 10/19/2006
• Est. Priority Date: 12/23/2002
• Status: Active Grant

• Current Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Reynolds, Brian R., Shireman, Brice, Vrba, Anthony
• Granted Patent: US 7,998,088 B2
• Time in Patent Office: Days
• US Class Current: 600/585
• CPC Class Codes: A61M 2025/09083 having a coil around a core
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

Guidewire with an improved distal end. A guidewire with an improved distal end may include a core wire, a solder tip disposed at a distal end of the core wire, a radiopaque inner coil coupled to the distal end of the core wire, an outer coil disposed along the length of the core wire, and a distal hub coupled to the core wire and disposed proximate a distal end of the inner coil.

Claims

1-41. -41. (canceled)

42. A guidewire comprising:

an elongate shaft having a proximal end and a distal end;

an atraumatic tip disposed at the distal end of the shaft;

a distal stop disposed on the elongate shaft proximal of the atraumatic tip;

a proximal stop disposed on the elongate shaft proximal of the distal stop;

an inner coil disposed about the elongate shaft between the proximal stop and the distal stop; and

an outer coil disposed about the elongate shaft and about the inner coil.

43. The guidewire of claim 42, wherein the inner coil is not secured to the elongate shaft.

44. The guidewire of claim 42, wherein the inner coil comprises a distal end disposed adjacent the distal stop and a proximal end disposed adjacent the proximal stop.

45. The guidewire of claim 42, wherein the elongate shaft comprises stainless steel, a nickel-titanium alloy or a composite of both.

46. The guidewire of claim 42, wherein the inner coil is radiopaque.

47. The guidewire of claim 42, wherein the inner coil comprises one of platinum, gold or tungsten alloy.

48. The guidewire of claim 42, wherein the outer coil comprises stainless steel or nickel-titanium alloy.

49. The guidewire of claim 42, wherein the outer coil comprises a distal end and a proximal end.

50. The guidewire of claim 49, wherein the outer coil distal end is coupled to the atraumatic tip.

51. The guidewire of claim 49, wherein the outer coil proximal end is coupled to the elongate shaft.

52. The guidewire of claim 42, wherein the distal stop comprises polytetrafluoroethylene.

53. The guidewire of claim 42, wherein the proximal stop comprises polytetrafluoroethylene.

54. A guidewire comprising:

an elongate shaft having a proximal end and a distal end;

an atraumatic tip disposed at the distal end of the shaft;

a distal stop disposed on the elongate shaft proximal of the atraumatic tip;

an inner coil disposed about the elongate shaft, the inner coil extending proximally from the distal stop, the inner coil having a distal end and a proximal end;

an outer coil disposed about the elongate shaft and about the inner coil; and

a solder band disposed adjacent the proximal end of the inner coil, the solder band securing together the inner coil, the outer coil and the elongate shaft.

55. The guidewire of claim 54, wherein the outer coil comprises a first increased pitch region and a second increased pitch region, and the solder band is disposed between the first increased pitch region and the second increased pitch region.

56. The guidewire of claim 55, wherein the inner coil comprises an increased pitch region disposed adjacent either the first increased pitch region or the second increased pitch region of the outer coil.

57. The guidewire of claim 54, wherein the outer coil is wound about the elongate shaft in a first direction and the inner coil is wound about the elongate shaft in an opposing second direction.

58. The guidewire of claim 54, wherein the inner coil is radiopaque.

59. The guidewire of claim 54, wherein the distal stop comprises polytetrafluoroethylene.

60. The guidewire of claim 54, wherein the distal end of the elongate shaft comprises a ribbon.

61. The guidewire of claim 60, wherein the distal stop is secured to the ribbon.