Coaxial balloon delivery device and method of delivering a transseptal cannula to a heart

• US 9,028,393 B2
• Filed: 05/07/2013
• Issued: 05/12/2015
• Est. Priority Date: 03/27/2009
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Farnan, Robert C.
• Primary Examiner(s): Bertram, Eric D.
• Application Number:
  US13/888,641
• Publication Number:
  US 20130231521A1
• Time in Patent Office: 735 Days
• Field of Search: 600/16
• US Class Current: 600/16
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2025/1061 having separate inflations tubes, e.g. coaxial tubes or tubes otherwise arranged apart from the catheter tube
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• 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 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/0194 Tunnelling catheters
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/1006 Balloons formed between concentric tubes
• CPC Class Codes: A61M 25/10182 Injector syringes
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices

Abstract

A transseptal cannula having a flexible cannula body, a left atrial anchor coupled to the distal end of the flexible cannula body, and a right atrial anchor operable to be attached to the left atrial anchor in vivo. The left and right atrial anchors are implanted and deployed separately. Delivery of the transseptal cannula to a heart tissue can include a low profile coaxial balloon catheter comprising a tube body including an inner member and an outer member surrounding the inner member and thereby creating an inflation channel between the inner and outer members, a hub coupled to the proximal portion of the tube body and including a fluid space in fluid communication with the inflation channel; and a balloon coupled to the distal portion of the tube body, wherein the balloon is in fluid communication with the inflation channel. The hub of the coaxial balloon catheter is constructed with a low profile so that other surgical devices can be directed over the coaxial hub without deflating and removing the balloon.

Claims

1. A coaxial balloon catheter comprising:

a tube body including an inner member and an outer member surrounding the inner member and thereby creating an inflation channel between the inner and outer members;

a coaxial hub coupled to a proximal portion of the tube body and including a fluid space in fluid communication with the inflation channel and further including a guidewire lumen, the coaxial hub having a low profile so that a surgical device can be loaded over the coaxial hub, the hub further including an annular grommet surrounding the guidewire lumen, and with a central aperture of the annular grommet aligned with the guidewire lumen, the grommet providing a fluidtight seal for the inflation channel and being puncturable to permit an inflation needle to pass therethrough for communication with the fluid space; and

a balloon coupled to a distal portion of the tube body, wherein a distal portion of the inner member extends through the balloon thereby creating an annular cavity between a wall of the balloon and the inner member.

2. The coaxial balloon catheter of claim 1, wherein the inner member within the balloon further includes a radiopaque marker.

3. The coaxial balloon catheter of claim 1, wherein the balloon further includes a distal cone structure operable to dilate an opening within a heart tissue.

4. The coaxial balloon catheter of claim 1, wherein the coaxial hub further includes a hub-body coupled to a hub-cap and enclosing the grommet.

5. The coaxial balloon catheter of claim 4, wherein the coaxial hub further includes a plurality of spokes positioned adjacent the grommet.

6. The coaxial balloon catheter of claim 5, wherein the plurality of spokes is operable to couple the inner member to the coaxial hub.

7. The coaxial balloon catheter of claim 5, wherein the plurality of spokes is operable to provide a positive stop for the grommet.

8. The coaxial balloon catheter of claim 4, wherein the hub-cap further includes a grommet retention feature operable to prevent migration of the grommet.