Balloon release mechanism for TAVI implant

• US 10,034,751 B2
• Filed: 05/12/2016
• Issued: 07/31/2018
• Est. Priority Date: 03/07/2013
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Glazier, Valerie J., Wang, Huisun, Grafov, Alex
• Primary Examiner(s): Templeton, Christopher L
• Application Number:
  US15/152,745
• Publication Number:
  US 20160256273A1
• Time in Patent Office: 810 Days
• CPC Class Codes: A61F 2/2433 using balloon catheter
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A delivery system for an implantable medical device having at least one retention member at an end thereof includes a shaft extending in a longitudinal direction. An elongated sheath surrounds the shaft. The sheath is slidable relative to the shaft in the longitudinal direction. A space is defined inside of the sheath and is adapted to receive the medical device in an assembled or collapsed condition. A retainer is positioned at a first end of the space. At least one recess is provided in the retainer and is adapted to receive the retention member of the medical device in the assembled condition. A selectively activable member is disposed in the compartment between the longitudinal shaft and the medical device. When in an activated state, the member expands radially relative to the shaft, thereby urging the retention member to disengage from the recess.

Claims

1. A method for delivering an implantable medical device having a retention member coupled to a stent thereof, the method comprising:

positioning a delivery device comprising a retainer, the implantable medical device, and a balloon element disposed underneath at least the stent at a predetermined location in a heart, the implantable medical device being in a collapsed state thereof with the retention member engaged with a corresponding recess in the retainer;

unsheathing a receiving space to expose at least a stent portion of the implantable medical device, whereupon the stent portion of the implantable medical device expands;

determining that the retention member has not disengaged from the corresponding recess in the retainer; and

disengaging the retention member from the corresponding recess in the retainer, by causing the balloon element to expand wherein the determining step includes using a sensor to sense the retention member engaged with the corresponding recess.

2. The method of claim 1, further comprising introducing an inflation medium into the balloon element to cause the balloon element to expand.

3. The method of claim 1, further comprising generating a sensor signal indicative of the engagement of the retention member with the corresponding recess.