Aortic occluder with associated filter and methods of use during cardiac surgery

• US 6,589,264 B1
• Filed: 01/07/2000
• Issued: 07/08/2003
• Est. Priority Date: 05/14/1996
• Status: Expired due to Term

• Current Assignee: Edwards Lifesciences Corporation
• Original Assignee: Edwards Lifesciences Corporation
• Inventors: Tsugita, Ross S., Maahs, Tracy D., Barbut, Denise, Pastrone, Giovanni
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Thanh, LoAn H.
• Application Number:
  US09/478,818
• Time in Patent Office: 1,278 Days
• Field of Search: 604/96.01, 604/104, 604/915, 604/101.04, 606/108, 606/113-114, 606/127, 606/128, 606/191, 606/192-194, 606/200, 606/159, 600/462, 600/468-470
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/00243 cardiac
• 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 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/018 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 2230/0065 toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61M 2025/0073 Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow general flow characteristics A61M2206/10
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2210/127 Aorta

Abstract

A balloon arterial cannula and methods for filtering blood. The devices generally include a mesh for filtering blood flowing within a blood vessel, particularly within an artery such as the aorta, a structure adapted to open and close the mesh within the blood vessel, a means to actuate the structure, and a balloon occluder which typically includes a flexible material enclosing a chamber. The methods generally include the steps of introducing a mesh into a blood vessel to capture embolic material, adjusting the mesh, if necessary, during the course of filtration, inflating the balloon occluder to occlude the vessel upstream of the mesh, and thereafter deflating the balloon occluder and removing the mesh and the captured foreign matter from the blood vessel. Additionally, visualization techniques are used to ensure effective filtration.

Claims

1. A cannula, comprising:

an elongate tubular member having a proximal end, a distal end, and a lumen therebetween;

a filter separately insertable through the elongate tubular member; and

an expandable occluder deployable from the distal region of the cannula.

2. The cannula of claim 1, further comprising a separate channel within the tubular member.

3. The cannula of claim 2, wherein the filter is insertable through the separate channel.

4. The cannula of claim 1, wherein the expandable occluder is a balloon occluder.

5. The cannula of claim 4, wherein the balloon communicates with an inflation lumen connectable to an external fluid source near a proximal end of the inflation lumen.

6. The cannula of claim 1, wherein the cannula is a blood cannula adapted to pass oxygenated blood for cardiopulmonary bypass procedures.

7. The cannula of claim 1, wherein the occluder is mounted on the distal end of the cannula.

8. The cannula of claim 1, wherein the distal end of the cannula is straight.

9. The cannula of claim 1, wherein the distal end of the cannula is curved.

10. The cannula of claim 1, further comprising a windsock that diverts blood flow.

11. A method for cannulation, comprising the steps of:

inserting a distal end of a cannula into a patient;

inserting a filter through a lumen of the cannula into the patient;

deploying the filter; and

expanding an occluder associated with the distal end of the cannula.

12. The method of claim 11, wherein the cannula is inserted into a vessel.

13. The method of claim 12, wherein the vessel is an aorta.

14. The method of claim 11, wherein the cannula is inserted into cardiac tissue.

15. The method of claim 11, further comprising the step of making an incision in the patient.

16. The method of claim 11, wherein the occluder is a balloon occluder.

17. The method of claim 11, wherein the step of deploying the filter comprises inflating an inflation seal comprising a toroidal balloon communicating with an inflation lumen.