Removing obstructive material from body lumens

• US 9,855,067 B2
• Filed: 01/08/2015
• Issued: 01/02/2018
• Est. Priority Date: 06/08/2008
• Status: Active Grant

• Current Assignee: Teleflex Life Sciences LLC (Teleflex Incorporated)
• Original Assignee: Hotspur Technologies, Inc. (Teleflex Incorporated)
• Inventors: Krolik, Jeffrey A., Mirzaee, Daryush, Dreher, James H., Domingo, Juan, Watanabe, Gwendoln
• Primary Examiner(s): HOLWERDA, KATHLEEN SONNETT
• Application Number:
  US14/592,888
• Publication Number:
  US 20150119896A1
• Time in Patent Office: 1,090 Days
• Field of Search: 606127, 606159, 606200
• 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 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/2217 single wire changing shape to a gripping configuration
• CPC Class Codes: A61B 2017/320064 with tissue or sample retaining means
• CPC Class Codes: A61B 2017/320775 Morcellators, impeller or propeller like means
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61M 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• 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 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

Abstract

An apparatus is provided for removing material within a body lumen that includes a catheter including a proximal end, a distal end for introduction into a body lumen, and an aspiration lumen extending therebetween; a guide member extending from the distal end and terminating in a distal tip, the guide member comprising a track adjacent a track lumen extending from the distal tip into the aspiration lumen; and an obstruction clearing device deployable from the guide member and retractable along the track. In addition or alternatively, the apparatus includes a cutting head reciprocable within the aspiration lumen adjacent the distal end for macerating material being aspirated into the aspiration lumen.

Claims

1. An apparatus for removing material within a body lumen, the apparatus comprising:

an elongate tubular member including a proximal end, a distal end sized for introduction into a body lumen, and an aspiration lumen extending between the proximal and distal ends;

a guide member including an orifice within the aspiration lumen at a proximal end of the guide member, a tapered distal tip distally extending from the distal end of the elongate tubular member at a distal end of the guide member, and a track lumen from the tapered distal tip through the orifice within the aspiration lumen, the guide member defining a track from the tapered distal tip to a distal end of the orifice; and

an obstruction clearing device comprising a core wire slidable within the track lumen and one or more lumen clearing elements deployable from the tapered distal tip of the guide member when the core wire is advanced relative to the guide member,

the lumen clearing elements comprising an expandable structure that is expanded from a contracted condition within the guide member to an expanded condition when deployed from the guide member for engaging material within a body lumen,

the expandable structure directable proximally along the track in the expanded condition when the core wire is subsequently retracted relative to the guide member for compressing the one or more lumen clearing elements when the one or more lumen clearing elements contact the orifice and drawing the one or more lumen clearing elements and any captured material into the aspiration lumen of the elongate tubular member.

2. The apparatus of claim 1, wherein the one or more lumen clearing elements are oriented substantially axially within the track lumen when the one or more lumen clearing elements are drawn through the orifice into the track lumen such that, when the core wire is advanced relative to the guide member, the one or more lumen clearing elements are directed through the track lumen in the contracted condition until the one or more lumen clearing elements are redeployed from the tapered distal tip of the guide member.

3. The apparatus of claim 1, wherein the one or more lumen clearing elements comprise a flexible arm coupled to the expandable structure.

4. The apparatus of claim 3, wherein the flexible arm slides within the track of the guide member.

5. The apparatus of claim 3, wherein the flexible arm has a length relatively smaller than a length of the expandable structure.

6. The apparatus of claim 1, wherein the expandable structure comprises an enclosed hoop.

7. The apparatus of claim 6, wherein the enclosed hoop has a circular or elliptical shape.

8. The apparatus of claim 1, wherein the expandable structure comprises a plurality of loops spaced apart axially along the core wire such that the plurality of loops are deployed successively from the tapered distal tip of the guide member.

9. The apparatus of claim 1, wherein the expandable structure comprises one or more cutting edges.

10. The apparatus of claim 1, wherein the track comprises a longitudinal slit defined by the guide member.

11. The apparatus of claim 1, wherein the one or more lumen clearing elements comprise a plurality of expandable structures spaced apart axially along the core wire such that the expandable structures are deployed successively from the tapered distal tip of the guide member.

12. The apparatus of claim 1, further comprising a handle on the proximal end of the elongate tubular member and an actuator on the handle coupled to the core wire for directing the core wire axially relative to the guide member for deploying and retracting the one or lumen clearing elements.

13. The apparatus of claim 1, wherein the one or more lumen clearing elements are biased to extend transversely relative to the core wire when deployed from the tapered distal tip the guide member.

14. The apparatus of claim 13, wherein the one or more lumen clearing elements are biased to extend transversely on one side of the core wire.

15. The apparatus of claim 1, wherein the one or more lumen clearing elements comprise a plurality of lumen clearing elements.

16. The apparatus of claim 15, wherein the plurality of lumen clearing elements are deployed successively from the tapered distal tip of the guide member.

17. The apparatus of claim 1, wherein a distal tip of the core wire is rounded.

18. The apparatus of claim 1, wherein the elongate tubular member further comprises a guidewire lumen adjacent to the aspiration lumen, the guidewire lumen extending between the proximal and distal ends of the elongate tubular member.

19. The apparatus of claim 1, wherein the aspiration lumen is coupled to a source of a vacuum.

20. The apparatus of claim 19, wherein the source of the vacuum is a syringe.