Embolic protection device

• US 20060089663A1
• Filed: 03/08/2005
• Published: 04/27/2006
• Est. Priority Date: 11/07/1997
• Status: Active Grant

• Current Assignee: Salviac Ltd. (Abbott Laboratories)
• Original Assignee: Salviac Ltd. (Abbott Laboratories)
• Inventors: Brady, Eamon, Vale, David, Taylor, Charles, Maher, Padraig, Gilson, Paul
• Granted Patent: US 7,837,701 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/015 Stop means therefor
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped

Abstract

An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval. The filter element (105) may conveniently be mounted on a tubular sleeve (104) which is slidable and rotatable on the guidewire (101) between spaced-apart slops (106, 120) on the guidewire (101) which allows some manipulation of the guidewire independently of the filter when the filter is in use.

Claims

1-42. -42. (canceled)

43. A method for protecting a patient during an interventional procedure, comprising the steps of:

advancing a guidewire to a desired location within a vessel;

advancing a filter and delivery sheath along the guidewire, the filter carried by the delivery sheath;

removing the delivery sheath from the filter, thereby releasing the filter;

expanding the filter within the desired location;

removing the delivery sheath from the desired location;

advancing a catheter over the guidewire to the desired location;

performing an interventional procedure at the desired location, wherein released embolic material is captured by the filter;

removing the catheter from the desired location;

advancing a retrieval sheath over the guidewire;

engaging the filter with the retrieval sheath; and

removing the filter and retrieval sheath from the desired location.

44. A method for protecting a patient during an interventional procedure, comprising the steps of:

advancing a guidewire to a desired location within a vessel;

advancing a filter and delivery sheath along the guidewire, the filter carried by the delivery sheath;

removing the delivery sheath from the filter, thereby releasing the filter;

expanding the filter within the desired location;

removing the delivery sheath from the desired location;

advancing a catheter over the guidewire to the desired location; and

performing an interventional procedure at the desired location, wherein released embolic material is captured by the filter.

45. The method of claim 44, further comprising the steps of:

removing the catheter from the desired location;

advancing a retrieval sheath over the guidewire;

engaging the filter with the retrieval sheath; and

removing the filter and retrieval sheath from the desired location.

46. The method of claim 44, wherein the filter is placed on a proximal end of the guidewire after the step of advancing the guidewire to the desired location within the vessel.

47. The method of claim 44, wherein the step of expanding the filter within the desired location is performed after the step of removing the delivery sheath from the desired location.

48. The method of claim 44, wherein the filter is expanded downstream of the desired location.

49. The method of claim 44, wherein the delivery sheath frictionally engages the filter.

50. The method of claim 44, further comprising a sleeve disposed within the delivery sheath, and having a distal end operatively associated with the filter.

51. The method of claim 44, wherein the guidewire further comprises a distal stop.

52. The method of claim 51, wherein the guidewire further comprises a proximal stop, and wherein the filter is released by withdrawing the delivery sheath until the filter bears against the proximal stop.

53. The method of claim 45, further comprising the steps of:

advancing a second filter over the guidewire; and

expanding the second filter within the desired location.

54. The method of claim 44, wherein the filter further comprises a locking mechanism that is operable to engage the guidewire and is releasable to allow the filter to slide along the guidewire, and wherein the method further comprises the step of locking the filter.

55. The method of claim 44, wherein the vessel is a carotid artery.

56. The method of claim 44, wherein the vessel is a coronary artery.

57. The method of claim 44, wherein the catheter is an angioplasty catheter.

58. The method of claim 44, wherein the catheter is a stent deployment catheter.

59. The method of claim 44, wherein the catheter is an atherectomy catheter.

60. A medical device, comprising:

a guidewire having a proximal end, a distal end, and a stop mounted on the distal end;

a delivery sheath having a proximal end, a distal end, and a lumen therebetween, the delivery sheath slideably engaging the guidewire; and

a filter releasably carried within the lumen of the delivery sheath, the filter slideably engaging the guidewire and removable from the guidewire by sliding the filter proximal on the guidewire,

wherein, in use, the guidewire is positioned within a vessel of a patient, the filter and delivery sheath are advanced along the guidewire to a desired location within the vessel, and the delivery sheath is removed from the filter to release the filter.

61. The medical device of claim 60, further comprising an interventional therapeutic catheter.

62. The medical device of claim 61, wherein the interventional therapeutic catheter is an angioplasty catheter.