Methods of protecting a patient from embolization during surgery

• US 20010041909A1
• Filed: 06/26/2001
• Published: 11/15/2001
• Est. Priority Date: 05/08/1997
• Status: Active Grant

• Current Assignee: Edwards Lifesciences Corporation
• Original Assignee: Embolx, Inc.
• Inventors: Tsugita, Ross S., Maahs, Tracy D., Jang, Yue-Teh
• Granted Patent: US 6,537,297 B2
• Time in Patent Office: Days
• 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 method for open surgery, comprising the steps of:

introducing a flexible elongate member into a peripheral artery, the flexible elongate member having a filter on a distal region thereof;

advancing the filter to a site within the aorta upstream of a branch vessel from the aorta;

deploying the filter;

manipulating the aorta by direct access; and

removing the filter from the aorta,

wherein embolic material is generated and filtered before the blood filter device is removed from the aorta.

2. The method of

claim 1

, wherein the filter is deployed at a region upstream of the site within the aorta.

3. The method of

claim 1

, wherein the branch vessel is the innominate artery.

4. The method of

claim 1

, further comprising the steps of introducing a blood bypass cannula into the aorta.

5. The method of

claim 4

, wherein the cannula is introduced upstream of the site where the filter is deployed.

6. The method of

claim 1

, wherein the step of manipulating the aorta comprises blocking the aorta.

7. The method of

claim 6

, wherein the step of blocking the aorta includes cross-clamping the aorta.

8. The method of

claim 1

, wherein the step of manipulating the aorta comprises unblocking the aorta while the blood filter device is deployed within the aorta.

9. The method of

claim 1

, wherein said elongate member is a catheter.

10. The method of

claim 1

, wherein said elongate member is a guidewire.

11. The method of

claim 10

, wherein said filter is releasably attached to the guidewire.

12. The method of

claim 1

, wherein the peripheral artery is selected from the group consisting of a subclavian artery and a femoral artery.