Percutaneous catheter and guidewire having filter and medical device deployment capabilities

• US 20030187475A1
• Filed: 03/26/2003
• Published: 10/02/2003
• Est. Priority Date: 05/08/1997
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Tsugita, Ross S., Maahs, Tracy D., Jang, Yue-Teh
• Granted Patent: US 6,964,673 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/320716 comprising means for preventing embolism by dislodged material
• 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 2/82 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 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 guidewire filter device, comprising:

a sheath with a proximal end and a distal end, the sheath having an inside surface and an outside and defining a lumen formed therethrough, the sheath having a plurality of slits formed near the distal end, the plurality of slits defining a plurality of struts;

a guidewire with a proximal end and a distal end, the guidewire distal end affixed to a point inside of the sheath that is distal to the struts; and

filter material positioned within the lumen in the sheath with the filter material being affixed to portions of struts;

whereby by pulling the proximal end of the guidewire relative to the sheath, the struts will expand outvardly and open up the filter material in the form of a filter basket.

2. The guidewire filter device of claim 1, wherein the slits and struts are formed longitudinally in the sheath.

3. The guidewire filter device of claim 1, wherein the filter material is folded and is positioned in the lumen.

4. The guidewire filter device of claim 1, further comprising a handle on the proximal end of the guidewire, the handle comprising a means for pulling of the guidewire relative to the sheath so that the filter basket can be opened in an incremental fashion.

5. The guidewire filter device of claim 1, wherein the filter material is sized and positioned such that it is affixed to about the distal most half of the struts.

6. The guidewire filter device of claim 1, wherein the filter material is affixed to the struts with adhesive.

7. The guidewire filter device of claim 1, wherein the filter material comprises stretchable and resilient material.

8. The guidewire filter device of claim 1, further comprising a floppy atraumatic guidewire tip.

9. The guidewire filter device of claim 1, wherein the slits and struts are formed in a spiral orientation in the sheath.

10. The guidewire filter device of claim 1, wherein the sheath has an outer diameter that is 0.13 cm or smaller.

11. The guidewire filter device of claim 1, wherein the filter material is affixed to an outside surface of the struts.

12. The guidewire filter device of claim 6, further comprising an outer section of filter material that is affixed to outside surfaces of the struts.

13. The guidewire filter device of claim 1, further comprising a catheter through which the guidewire filter device is slideably positionable.

14. The guidewire filter device of claim 1, wherein at least in the area of the struts, the sheath comprises memory material which will tend to cause the struts to preferentially return to a straight and unexpanded shape.