IMPLANT DELIVERY SYSTEM AND METHOD OF USE

• US 20180008440A1
• Filed: 09/18/2017
• Published: 01/11/2018
• Est. Priority Date: 04/08/2014
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker Corporation, Stryker European Holdings I, LLC (Stryker Corporation)
• Inventors: Khenansho, Michael
• Granted Patent: US 10,610,390 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61M 2025/1056 having guide wire lumens outside the main shaft, i.e. the guide wire lumen is within or on the surface of the balloon
• 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 implant delivery system including a catheter having a delivery lumen; a pusher member slidably disposed in the catheter delivery lumen; a retaining member coupled to a distal end portion of the pusher member, the retaining member configured to retain an expandable implant in a collapsed configuration on the pusher member for delivery of the implant through the catheter delivery lumen; and an expandable actuator coupled to the distal end portion of the pusher member and operatively associated with the retaining member, wherein expansion of the actuator causes the retaining member to disengage from an implant carried on the pusher member, to thereby allow the implant to expand from the collapsed configuration.

Claims

1. An implant delivery system, comprising:

a catheter having a delivery lumen;

a pusher member slidably disposed in the catheter delivery lumen;

a retaining member coupled to a distal end portion of the pusher member, the retaining member configured to retain an expandable implant in a collapsed configuration on the pusher member for delivery of the implant through the catheter delivery lumen; and

an expandable actuator coupled to the distal end portion of the pusher member and operatively associated with the retaining member, wherein expansion of the actuator causes the retaining member to disengage from an implant carried on the pusher member, to thereby allow the implant to expand from the collapsed configuration.

2. The system of claim 1, wherein the actuator comprises an inflatable membrane, and the pusher member comprises an inflation lumen in communication with an interior region defined by the membrane, wherein the retaining member is affixed to the membrane.

3. The system of claim 1, further comprising an expandable implant carried on the pusher member, the retaining member comprising a first end attached to the pusher member at a location distal to the implant, and a second end releasably engaging the implant to thereby retain the implant in the collapsed configuration on the pusher member, wherein the retaining member is biased to retain the implant in the collapsed configuration on the pusher member.

4. The system of claim 3, wherein the expandable implant comprises a tubular body.

5. An implant delivery system, comprising:

a catheter having a delivery lumen;

a pusher member slidably disposed in the catheter delivery lumen;

an expandable implant carried on a distal end portion of the pusher member;

a plurality of retention members, each having a first end attached to the pusher member at a location distal to the implant, and a second end releasably engaging the implant to thereby retain the implant in the collapsed configuration on the pusher member for delivery of the implant through the catheter delivery lumen; and

an inflatable membrane attached to the pusher member and having an exterior surface affixed to the respective retention members, the pusher member comprising an inflation lumen in communication with an interior region defined by the membrane, wherein inflation of the membrane causes the retaining members to disengage the implant and thereby allow the implant to expand from the collapsed configuration.

6. The system of claim 5, wherein the respective first ends of the retention members are pivotally attached to the pusher member.

7. The system of claim 5, wherein the retention members are biased to retain the implant in the collapsed configuration on the pusher member.

8. The system of claim 5, wherein the pusher member comprises a stop member proximally disposed to the expandable implant carried on the pusher member, wherein the stop member limits translation movement of the implant in its collapsed configuration.

9. The system of claim 8, wherein the stop member comprises an annular ring or a plurality of protrusions disposed on the pusher member.

10. The system of claim 5, further comprising a guidewire disposed within the inflation lumen of the pusher member, and a seal member disposed distally to the expandable actuator of the pusher member, wherein the seal member has an opening therethrough to allow passage of the guidewire.

11. A method of delivering an implant to a target site in a body lumen, the implant having a collapsed delivery configuration, and an expanded implanted configuration, the method comprising:

inserting a catheter into the body lumen, until an open distal end of the catheter is proximate the target site in the body lumen;

advancing a pusher member having the implant loaded thereon in the collapsed configuration through a delivery lumen of the catheter, until the implant is positioned adjacent the open distal end of the catheter, wherein the implant is releasably retained in the collapsed configuration on the pusher member by a retaining member coupled to the pusher member distal to the implant;

advancing the implant out the open distal end of the catheter and into the body lumen proximate the target site by one or both of withdrawing the catheter relative to the pusher member, or further advancing the pusher member relative to the catheter; and

expanding an actuator coupled to the distal end portion of the pusher member, wherein expansion of the actuator causes the retaining member to disengage the implant and thereby allow the implant to expand from the collapsed configuration to the expanded configuration.

13. The method of claim 12, the actuator comprising an inflatable membrane, and the pusher member comprising a lumen in communication with an interior region defined by the membrane, wherein expanding the actuator comprises supplying an inflation medium through the pusher member lumen to inflate the membrane, wherein the membrane is affixed to the retaining member, the method further comprising:

after inflating the membrane to disengage the retaining member from the implant and thereby allow the implant to expand from the collapsed configuration to the expanded configuration,

supplying a vacuum through the pusher member lumen to deflate the membrane, and thereby collapse the retaining member towards the pusher member, and

withdrawing the pusher member and retaining member into the catheter.

14. The method of claim 13, wherein the retention member is biased to retain the implant in the collapsed configuration on the pusher member.