Balloon catheter with dynamic vessel engaging member

• US 10,286,190 B2
• Filed: 12/10/2014
• Issued: 05/14/2019
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: William Cook Europe ApS (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Moelgaard-Nielsen, Arne, Aggerholm, Steen, Lysgaard, Thomas
• Primary Examiner(s): Schmidt, Emily L
• Application Number:
  US14/566,080
• Publication Number:
  US 20150157832A1
• Time in Patent Office: 1,616 Days
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• CPC Class Codes: A61M 2025/0092 Single injection needle protruding laterally from the distal tip
• CPC Class Codes: A61M 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• 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
• CPC Class Codes: A61M 2025/1093 having particular tip characteristics
• 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

The technical disclosure relates to catheters useful for engaging a vessel from within a lumen defined by the vessel. A catheter includes an elongate shaft, an inflatable balloon disposed on the distal end of the elongate shaft, a guide disposed on the external surface of the balloon, and an engaging member having a distal end releasably secured by the guide such that the guide maintains the engaging member distal end adjacent the outer surface of the balloon when the balloon is in an uninflated configuration but releases the engaging member distal end as the balloon moves from an uninflated configuration to an inflated configuration. The technical disclosure also relates to methods of using a catheter.

Claims

1. A catheter, comprising:

an elongate shaft having a proximal end, a distal end, a main body extending between the proximal end and the distal end, and a longitudinal axis, the main body defining an inflation lumen;

a balloon disposed on the distal end of the elongate shaft, the balloon having an external surface, a proximal balloon neck and a distal balloon neck, the balloon defining an interior chamber in fluid communication with the inflation lumen and adapted to move from an uninflated configuration to an inflated configuration as fluid moves from the inflation lumen into the interior chamber;

a guide disposed on the external surface of the balloon between the proximal balloon neck and the distal balloon neck with respect to the longitudinal axis of the elongate tubular member, the guide comprising a groove defined by the external surface of the balloon in both the inflated configuration and uninflated configuration; and

an engaging member having an engaging member proximal end and an engaging member distal end, the engaging member proximal end disposed proximal to the proximal balloon neck, the engaging member distal end releasably secured by the guide such that the guide maintains the engaging member distal end adjacent the external surface of the balloon when the balloon is in an uninflated configuration but releases the engaging member distal end as the balloon moves from an uninflated configuration to an inflated configuration;

wherein the engaging member comprises a cannula defining an engaging member passageway; and

wherein the groove extends from the external surface of the balloon toward the interior chamber.

2. The catheter of claim 1, wherein the engaging member distal end defines a cutting edge.

3. A catheter, comprising:

an elongate shaft having a proximal end, a distal end, a main body extending between the proximal end and the distal end, and a longitudinal axis, the main body defining an inflation lumen;

a balloon disposed on the distal end of the elongate shaft, the balloon having an external surface, a proximal balloon neck, a distal balloon neck, and an intermediate portion extending between the proximal balloon neck and the distal balloon neck, the balloon defining an interior chamber in fluid communication with the inflation lumen and adapted to move from an uninflated configuration to an inflated configuration as fluid moves from the inflation lumen into the interior chamber;

a guide disposed on the proximal balloon neck and extending into the intermediate portion of the balloon, the guide comprising a groove defined by the external surface of the balloon in both the inflated configuration and uninflated configuration and defining a guide passageway; and

an engaging member comprising a cannula defining an engaging member passageway, the engaging member having an engaging member proximal end, an engaging member distal end defining a cutting edge, and a portion disposed within the guide passageway, the engaging member proximal end disposed proximal to the proximal balloon neck;

wherein the groove extends from the external surface of the balloon toward the interior chamber.

4. The catheter of claim 3, wherein the engaging member distal end extends along a first engaging member axis that is substantially parallel to the longitudinal axis of the elongate shaft when the balloon is in the unexpanded configuration;

and

wherein the engaging member distal end extends along a second engaging member axis that is different from the first engaging member axis when the balloon is in the expanded configuration.

5. The catheter of claim 3, wherein the groove comprises an undulating wall defining a series of projections and depressions.

6. The catheter of claim 3, wherein the engaging member is fixedly attached to the elongate shaft such that the engaging member is not able to move axially relative to the elongate shaft.

7. The catheter of claim 3, wherein the engaging member is capable of axial movement relative to the elongate shaft.

8. The catheter of claim 3, wherein the guide has a proximal end having a first inner diameter and a distal end having a second inner diameter, the first inner diameter being less than the second inner diameter.

9. The catheter of claim 8, wherein the engaging member is friction fit with the proximal end of the guide.