Rapid exchange emboli capture guidewire system and methods of use

Abstract

A catheterization system and method including a rapid exchange emboli capture guidewire system comprising a distal emboli protection device is disclosed. The protection device is delivered to an area of interest via a delivery sheath including a longitudinal exit configured to permit the sheath to be peeled away from the guidewire to speed its removal. A capture sheath having a side-port is used to capture and retrieve the filter after a catheterization treatment procedure in a time saving manner. A torque steering device is used to steer the device and is adapted to clamp onto the guidewire while leaving sheaths free to prevent inadvertent steering of the sheaths. Using the sheaths of the present invention also allows systems to use shorter guidewires than prior art systems, further speeding the catheterization procedures being performed.

Description

IV. BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is described with reference to the accompanying drawings. In the drawings, like reference numerals indicate identical or functionally similar elements.

FIG. 1 illustrates an exemplary guidewire filter system for use in connection with the present invention.

FIG. 2 illustrates an embodiment of a delivery sheath according to the invention.

FIG. 3 illustrates an embodiment of a delivery sheath loaded with a guidewire filter system for deployment according to the invention.

FIG. 4 is a cross-sectional view of FIG. 3 taken along lines A-A.

FIG. 5 is a cross-sectional view of FIG. 3 taken along lines B-B.

FIG. 6 illustrates an embodiment of a delivery sheath being removed from the corewire of a guidewire filter system after deployment of the filter.

FIG. 7 illustrates an embodiment of a capture sheath according to the invention.

FIG. 8 illustrates an embodiment of a capture sheath in the process of retrieving a deployed filter of a guidewire filter system.

FIG. 9 illustrates a torque device for steering a guidewire system according to the invention.

FIG. 10 illustrates alternative configurations of peelable sheath and torque clamping locations according to the invention.

Claims

1. A delivery sheath for use in catheterization processes comprising: a lumen having a distal end, a proximal end, and a sidewall defining an interior channel configured to allow a wire to longitudinally transverse through said lumen; wherein said sidewall further includes a longitudinal exit along a length of said lumen for allowing a portion of a wire disposed therein to pass laterally therethrough.

2. The delivery sheath of claim 1, further comprising a distal bulb defined by said distal end for housing a wire-guided device to be delivered.

3. The delivery sheath of claim 1, wherein said longitudinal exit extends from said proximal end into a portion of said distal end.

4. The delivery sheath of claim 3, wherein said longitudinal exit comprises a slit sized to retain a wire disposed therein while allowing said sheath to be peeled away from said wire.

5. The delivery sheath of claim 3, wherein said longitudinal exit comprises a series of perforations adapted to allow said sheath to be peeled away from a wire disposed in said channel for the length transversed by said perforations.

6. The delivery sheath of claim 3, wherein said longitudinal exit comprises a longitudinal scored area adapted to allow said sheath to be peeled away from a wire disposed in said channel for the length transversed by said scored area.

7. The delivery sheath of claim 3, wherein said exit comprises a channel having a frangible membrane adapted to retain said wire while allowing said sheath to be peeled away from a length of said wire adjacent said channel.

8. The delivery sheath of claim 1, further comprising a peel-initiator handle adapted to allow a user to initiate the removal of said sheath from an area of a wire disposed in said channel via said longitudinal exit.

9. The delivery sheath of claim 1, wherein said sheath includes a cut-away portion configured to allow a user to initiate the removal of said sheath from an area of a wire disposed in said channel via said longitudinal exit.

10. An emboli capture guidewire system comprising: a wire-guided distal protective device;a delivery sheath for delivering said distal protective device to a site of interest said delivery sheath including a longitudinal exit for said wire associated with said distal protection device; wherein said longitudinal exit allows said sheath to be peeled away from said wire.

11. The system of claim 10, wherein said distal protective device comprises an emboli filter.

12. The system of claim 10, further comprising a torque device for steering said wire-guide distal protective device.

13. The system of claim 12, further comprising a peel-initiator handle disposed on a proximal end of said delivery sheath for facilitating said peeling away process.

14. The system of claim 13, wherein said torque device clamps onto said wire without clamping onto said peel-initiator handle, thereby allowing said wire-guided device to be steered without steering of said delivery sheath.

15. The system of claim 12, wherein said delivery sheath includes a cut-away portion on a proximal end for facilitating said peeling away process.

16. The system of claim 15, wherein said torque device clamps onto said wire without clamping onto said sheath, thereby allowing said wire guided device to be steered without steering of said delivery sheath.

17. The system of claim 10, further comprising a capture sheath for retrieving said distal protection device; said capture sheath including a side-port that allows said capture sheath to be thread onto said wire in a manner that said wire passes into said capture sheath through a distal opening and exits said side-port.

18. The system of claim 17, wherein said capture sheath includes a distal bulb for collapsing and holding said distal protection device; and a rigid proximal portion that facilitates maneuvering said capture sheath.

19. A method of performing a catheterization procedure comprising: inserting a emboli capture guidewire system into a delivery sheath and delivering said emboli capture guidewire system to a downstream side of a lesion to be treated using a torque device clamped on a corewire of said system;removing said torque device and peeling away said delivery sheath from an area of said wire via a longitudinal exit spanning from a proximal end of said sheath to an area in said distal end of said sheath;proximally withdrawing the remainder of said delivery sheath from said corewire;inserting a treatment system over the corewire to the lesion and performing the treatment procedure;removing the treatment system;inserting a capture sheath and capturing said distal protection device; andremoving the capture sheath and corewire.

20. The method of clam 19, wherein said emboli capture system comprises an emboli filter and wherein said treatment system comprises a balloon catheter angioplasty system or a stenting system.