Transcarotid neurovascular catheter

• US 9,492,637 B2
• Filed: 02/22/2016
• Issued: 11/15/2016
• Est. Priority Date: 12/23/2013
• Status: Active Grant

• Current Assignee: Silk Road Medical, Inc.
• Original Assignee: Silk Road Medical, Inc.
• Inventors: Garrison, Michi E., Wilson, Scott D.
• Primary Examiner(s): LANDRY II, GERALD ERNEST
• Application Number:
  US15/050,039
• Publication Number:
  US 20160166804A1
• Time in Patent Office: 267 Days
• Field of Search: 604/523, 604/525, 604/534
• US Class Current: 1/1
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/00991 Telescopic means
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22039 eccentric
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2017/22054 with two balloons
• CPC Class Codes: A61B 2017/22062 to be filled with liquid
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/22072 with an instrument channel, e.g. for replacing one instrument by the other in cannulas A61B17/3417
• CPC Class Codes: A61B 2017/22074 the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/22082 after introduction of a substance
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61B 2017/2217 : single wire changing shape to a gripping configuration
• CPC Class Codes: A61B 2017/320775 : Morcellators, impeller or propeller like means
• CPC Class Codes: A61B 2017/3484 : Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2017/3486 : Balloon
• CPC Class Codes: A61B 2090/062 : penetration depth
• 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: A61M 2025/0004 : having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0037 : characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0042 : Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0175 : having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 2025/0681 : Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2025/1052 : for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2210/12 : Blood circulatory system
• CPC Class Codes: A61M 25/0023 : by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0041 : pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• CPC Class Codes: A61M 25/0043 : characterised by structural features
• CPC Class Codes: A61M 25/0054 : with regions for increasing flexibility
• CPC Class Codes: A61M 25/0068 : Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/007 : Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/01 : Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/0662 : Guide tubes
• CPC Class Codes: A61M 29/00 : Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00

Abstract

An interventional catheter for treating an artery includes an elongated body sized and shaped to be transcervically introduced into a common carotid artery at an access location in the neck. The elongated body has an overall length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use.

Claims

1. A method of treating an artery, comprising:

introducing an interventional catheter formed of an elongated body into a common carotid artery via an access location in a neck, the elongated body sized and shaped to be introduced into the common carotid artery at the access location in the neck, wherein the elongated body includes an internal lumen forming a proximal opening in a proximal region of the elongated body and a distal opening in a distal region of the elongated body, and wherein the elongated body has a proximal most section and a distal most section wherein the proximal most section is a stiffest portion of the elongated body and wherein the elongated body has an overall length and a distal most section length such that the distal most section can be positioned in an intracranial artery and while simultaneously at least a portion of the proximal most section is positioned in the common carotid artery during use;

(a) wherein the distal most section of the catheter has an inner diameter of 0.035 to 0.062 inch;

(b) wherein the catheter can navigate around a 180°

bend with a radius of 0.100″

without kinking;

(c) wherein the catheter does not collapse when connected to a vacuum up to 25 inHg while navigating around a 180°

bend with a radius of 0.100″

;

navigating the elongated body distally to an intracranial artery through the common carotid artery.

2. A method as in claim 1, wherein the elongated body includes a first transition section between the proximal section and the distal most section, and wherein the transition section has a stiffness between a stiffness of the proximal most section and the distal most section.

3. A method as in claim 1, wherein the elongated body has a working length and wherein the distal most section is between 3% and 15% of the length of the working length of the elongated body.

4. A method as in claim 1, wherein the elongated body has a working length and wherein the distal most section is between 4% and 25% of the length of the working length of the elongated body.

5. A method as in claim 2, wherein the first transition section is between 7 and 35% of the length of the working length of the catheter.

6. A method as in claim 2, wherein the first transition section is between 6 and 20% of the length of the working length of the catheter.

7. A method as in claim 3, wherein the elongated body has an inner diameter of 0.068″

to 0.095″ and

a working length of 40-60 cm.

8. A method as in claim 3, wherein the elongated body has an inner diameter of 0.035″

to 0.062″ and

a working length of 50-70 cm.

9. A method as in claim 1, wherein the elongated body varies in stiffness moving along at least a portion of the length of catheter.

10. A method as in claim 9, wherein the variation in stiffness is represented by smooth change in flexibility without any sudden changes in flexibility.

11. A method as in claim 9, wherein the flexibility of the elongated body transitions gradually moving along its length without any discrete variations in flexibility from one section of the elongated body to an adjacent section of the elongated body.

12. A method as in claim 1, wherein the proximal most section has a stiffness in the range of 100 to 500 N-mm2.

13. A method as in claim 1, wherein the distal most section has a stiffness in the range of 3 to 10 N-mm2.

14. A method as in claim 1, wherein the distal most section is between 5 and 15 cm in length.

15. A method as in claim 1, wherein the distal most section is between 3 and 10 cm in length.

16. A method as in claim 2, wherein the first transition section is between 5 and 10 cm in length.

17. A method as in claim 2, wherein the first transition section is between 4 and 8 cm in length.

18. A method as in claim 1, wherein the elongated body has a working length of 40 cm and the proximal most section has a length of 10 to 30 cm.

19. A method as in claim 1, further comprising inserting an inner member inside the internal lumen of the elongated body, the inner member having a tapered leading edge.