Atraumatic implantation and closure of reconstructive laac device for safety and efficacy

An implant assembly for left atrial appendage closure, comprising:

• a delivery sheath defining a lumen;
• a rotator sheath slidably disposed within the lumen of the delivery sheath;
• an actuation sheath disposed within a lumen of the rotator sheath;
• an implant releasably coupled to a distal end of the rotator sheath and the actuation sheath, the implant including:
• an expandable framework configured to expand from a collapsed delivery configuration to an expanded deployed configuration;
• a shaft slidably disposed within at least a portion of the expandable framework;
• a rod disposed within the shaft and coupled to the expandable framework and the actuation sheath;
• and
• a lock coupled to a proximal end of the shaft, the lock including an engagement member configured to move between a proximally facing constrained configuration and a distally facing radially expanded configuration.

A method of closing a left atrial appendage, comprising:

• coupling a delivery system to an implant, the implant including:
• an expandable framework having a proximal end coupled to a collar, the expandable framework configured to expand from a collapsed delivery configuration to an expanded deployed configuration, at least a portion of the expandable framework having a plurality of projections extending laterally therefrom;
• a shaft disposed within the collar and axially moveable relative to the collar;
• a lock coupled to the shaft, the lock including an engagement member configured to move between a proximally facing constrained configuration and a distally facing radially expanded configuration;
• wherein the expandable framework is in the collapsed delivery configuration and the engagement member is in the proximally facing constrained configuration within the delivery system;
• inserting the delivery system through a patient's vasculature until the expandable framework, in the collapsed delivery configuration, is positioned inside the left atrial appendage;
• withdrawing the delivery system from the expandable framework to allow the expandable framework to expand to the expanded deployed configuration;
• rotating at least a portion of the delivery system to rotate the expandable framework and engage the plurality of projections with an inner surface of the left atrial appendage and twist a neck of the left atrial appendage around the shaft;
• withdrawing the delivery system from the lock to allow the engagement member to move into the distally facing radially expanded configuration adjacent a proximal face of the twisted neck of the left atrial appendage;
• pulling the expandable framework proximally until the twisted neck of the left atrial appendage is pinched between the expandable framework and the engagement member;
• and
• disengaging the delivery system from the implant.