Vascular device for emboli and thrombi removal and methods of use

• US 7,306,618 B2
• Filed: 03/21/2002
• Issued: 12/11/2007
• Est. Priority Date: 07/30/1999
• Status: Expired due to Term

• Current Assignee: Incept LLC
• Original Assignee: Incept LLC
• Inventors: Khosravi, Farhad, Renati, Richard J., Demond, Jackson F., Ramee, Stephen, Salahieh, Amr, Young, Kirk Hsueh-kai, Krolik, Jeff A.
• Primary Examiner(s): Hayes; Michael J.
• Assistant Examiner(s): NGUYEN, VI X
• Application Number:
  US10/103,022
• Publication Number:
  US 20020161393A1
• Time in Patent Office: 2,091 Days
• Field of Search: 606/159, 606/191, 606/194, 606/200, 606/198, 604/160, 604/161, 604/164.05
• US Class Current: 606/200
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/012 Multiple filtering units
• 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 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2025/109 having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow

Abstract

Apparatus and methods are provided for use in filtering emboli from a vessel and/or performing thrombectomy and embolectomy, wherein a vascular device disposed on a guidewire comprises a support hoop disposed from a suspension strut. Alternately, a support hoop having an articulation region may be directly connected to a region proximate the distal end of the guidewire. A blood permeable sac is affixed to the support hoop to form a mouth of the blood permeable sac. The support hoop is disposed obliquely relative to the longitudinal axis of the guidewire and is capable of being properly used in a wide range of vessel diameters. The vascular device collapses during removal to prevent material from escaping from the sac. A delivery sheath and introducer sheath for use with the vascular device of the present invention are also provided.

Claims

1. Apparatus suitable for filtering emboli comprising:

an elongated member having a distal region having a longitudinal axis;

a vascular filter including;

i) a support hoop;

ii) a suspension strut coupling the support hoop to the distal region so that the support hoop may be eccentrically laterally displaced relative to the longitudinal axis; and

iii) a blood permeable sac affixed to the support hoop so that the support hoop forms a mouth of the blood permeable sac; and

a delivery sheath having a lumen and a longitudinal perforation, the delivery sheath retaining the vascular filter in a contracted delivery state within the lumen of the delivery sheath.

2. The apparatus of claim 1, wherein the blood permeable sac comprises a biocompatible material.

3. The apparatus of claim 2, wherein the biocompatible material comprises a material chosen from a group consisting of polyethylene, polypropylene, polyurethane, polyester, polyethylene tetraphlalate, nylon and polytetrafluoroethylene.

4. The apparatus of claim 1, wherein the blood permeable sac comprises a woven material having a plurality of pores, the pores having a size determined by a weave pattern of the woven material.

5. The apparatus of claim 4, wherein each one of the plurality of pores has a diameter in a range of 20 to 400 microns.

6. The apparatus of claim 1, wherein the support hoop comprises a super-elastic material.

7. The apparatus of claim 1, wherein the support hoop comprises stainless steel.

8. The apparatus of claim 1, wherein the apparatus has a deployed state, wherein the support hoop engages an interior wall of a patient'"'"'s vessel, and a delivery state, wherein the apparatus has a contracted configuration to permit insertion within a delivery sheath.

9. The apparatus of claim 8, wherein the mouth of the blood permeable sac is closed when the apparatus is in the contracted configuration to prevent emboli from escaping from the blood permeable sac.

10. The apparatus of claim 9, wherein opposite sides of the support hoop close towards one another when the apparatus is contracted to its contracted configuration.

11. The apparatus of claim 1, further comprising a single-use delivery sheath.

12. The apparatus of claim 1, wherein the support hoop comprises a radiopaque feature.

13. The apparatus of claim 1, further comprising a tube disposed in the distal region, and the suspension strut and blood permeable sac are affixed to the tube.

14. The apparatus of claim 13, wherein the distal region has a reduced diameter to accept the tube.

15. The apparatus of claim 13, further comprising a nose cone disposed on the tube.

16. the apparatus of claim 1, wherein the suspension strut further includes one or more side turns to stabilize and orient the apparatus in the deployed state.

17. The apparatus of claim 1, wherein the elongated member is a guide wire.

18. The apparatus of claim 1, wherein the blood permeable sac has a length and a diameter that tapers along the length.

19. The apparatus of claim 1, wherein the blood permeable sac comprises a plurality of pores formed by laser drilling.

20. The apparatus of claim 1, further comprising an introducer sheath having a longitudinal slit, the introducer sheath facilitating insertion of the vascular filter into a guide catheter.