Distal protection device and method

• US 6,371,969 B1
• Filed: 12/03/1999
• Issued: 04/16/2002
• Est. Priority Date: 05/08/1997
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Tsugita, Ross S., Maahs, Tracy D., Jang, Yue-Teh
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/453,659
• Time in Patent Office: 865 Days
• Field of Search: 606/200, 606/191, 606/159, 606/195, 606/198, 606/109, 606/113, 606/114, 606/127
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/320716 comprising means for preventing embolism by dislodged material
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• 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 2/014 Retrograde blood flow filters, i.e. device inserted against the blood flow direction
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas

Abstract

The invention provides a nested tubing cannula which comprises outer and inner elongate tubular members, both having a proximal end, a distal end, and a lumen therebetween. The inner tubular member is sealed at its distal end and is nested substantially coaxially within the lumen of the outer tubular member, so that the gap between the inner and the outer tubular member defines a second lumen whereas the first lumen is the lumen of the inner tubular member. A tubular sleeve is disposed coaxially between the inner and outer tubular members. A balloon is mounted on a distal region of the outer tubular member and is in communication with the first lumen. The cannula further comprises a port proximal or distal the balloon occluder and is in communication with the second lumen. Methods for making the devices herein are disclosed.

Claims

1. A device adapted for deployment in a body vessel, comprising:

a filter having a plurality of openings for fluid flow therethrough, and a proximally located mouth;

a proximally-tapered collapsible frame coupled to the filter and adapted to operate between an expandable profile and a collapsed profile, said frame comprising outwardly sloping longitudinal ribs having opposed proximal and distal ends, said proximal ends being coupled to a guidewire, and said distal ends being coupled to the mouth; and

a sheath formed of a tubular member sized for placement over the ribs to collapse the filter, the proximal ends of the ribs are movable relative to the sheath between a first position wherein at least a portion of the ribs are located within and engage by the sheath and a second position wherein the ribs are expanded relative to the first position and the ribs located substantially distal of the sheath.

2. The device of claim 1, wherein the mouth is normally biased in the expanded profile.

3. The device of claim 2, wherein the mouth is formed of a resilient wire material.

4. The device of claim 1, wherein the mouth and ribs are integrally formed from a mesh sheet material.

5. The device of claim 1, wherein the filter is generally cone-shaped.

6. The device of claim 1, wherein the mouth is formed of a pleated ring.

7. The device of claim 6, wherein the pleated ring includes at least four folds.

8. The device of claim 1, wherein ribs are fixedly secured to the guidewire.

9. The device of claim 1, further comprising a collar slideably disposed over the guidewire and wherein the ribs are coupled to the collar, the guidewire extending through the mouth and along a length of the filter.

10. The device of claim 1, wherein the frame includes at least four ribs.

11. The device of claim 1, wherein the mouth and ribs are integrally formed.