Shaping improvements for Inferior Vena Cava filter and retrieval systems

• US 10,022,213 B2
• Filed: 12/12/2014
• Issued: 07/17/2018
• Est. Priority Date: 06/14/2013
• Status: Active Grant

• Current Assignee: Avantec Vascular Corporation (Nipro Corporation)
• Original Assignee: Avantec Vascular Corporation (Nipro Corporation)
• Inventors: Becking, Frank, DeBeer, Nicholas, Halden, Karl, Ruvalcaba, Teresa
• Primary Examiner(s): Templeton, Christopher L
• Application Number:
  US14/569,500
• Publication Number:
  US 20150105819A1
• Time in Patent Office: 1,313 Days
• 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 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• 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 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61M 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils

Abstract

Funnel-trap type devices are described that are made of shape-set (e.g., heatset) braid for delivery and/or retrieval of Inferior Vena Cava (IVC) filters or other medical devices. Delivery and/or retrieval devices, kits in which they are included, methods of use and methods of manufacture are all contemplated. Additional forming tooling, methods and device embodiment shapes are described herein.

Claims

1. An apparatus for delivery or retrieval of a vascular medical device, the apparatus comprising:

an elongate sleeve;

an elongate shaft having a longitudinal axis and received within the sleeve, the shaft having a flexible distal extension folded back at a first fold to form two layers, the two layers folded back inwardly at a second fold such that the first fold is a proximal opening of a funnel and the second fold is a distal opening of the funnel;

wherein the distal opening is configured to have a saddle shape cross section and to be set at an acute angle relative to the axis of the shaft upon deployment; and

wherein the proximal opening is sized to receive and pass an end portion of the medical device to situate and secure the end portion of the medical device within the flexible distal extension when the sleeve is advanced over the distal extension.

2. The apparatus of claim 1, wherein the distal extension comprises heatset Nitinol braid with between 72 and 288 end count.

3. The apparatus of claim 2, wherein the shaft includes the Nitinol braid.

4. The apparatus of claim 1, wherein the sleeve is a catheter.

5. The apparatus of claim 1, wherein the distal extension has an exterior conical shape.

6. The apparatus of claim 1, wherein the acute angle is between about 45 and about 60 degrees.

7. The apparatus of claim 1, wherein the distal opening is configured to close and trap the end portion of the medical device within the distal extension when the sleeve is advanced over the distal extension.

8. The apparatus of claim 7, wherein the proximal opening is configured to close and trap the end portion of the medical device within the distal extension when the sleeve is advanced over the distal extension.

9. An inferior vena cava filter system, comprising:

an inferior vena cava filter having an enlarged end;

a retrieval apparatus comprising an elongate sleeve and an elongate shaft having a

longitudinal axis, the elongate shaft being received within the sleeve, the shaft having a flexible distal extension folded back at a first fold to form two layers, the two layers folded back inwardly at a second fold such that the first fold is a proximal opening of a funnel and the second fold is a distal opening of the funnel; and

wherein the distal opening is configured to have a saddle shape cross section and to be set at an acute angle relative to the axis of the shaft upon deployment, wherein the proximal opening is sized to receive and pass the enlarged end of the filter therethrough and secure the end of the filter within the distal extension when the sleeve is advanced over the distal extension.

10. The system of claim 9, wherein the enlarged end is selected from a group consisting of a band and a hook.