System and method for delivering a left atrial appendage containment device
A method of delivering and deploying the device for containing the emboli during a surgical procedure proximate to the heart. Access is gained to the heart and the left atrium such that a distal end of the delivery sheath can be located near the left atrial appendage. A distal end of a delivery catheter can be loaded with the device in a collapsed position and passed through the delivery sheath thereby delivering the device within the left atrial appendage. The device is expanded to contain emboli in the left atrium appendage.
1. A system for deploying a medical implant, comprising:
a delivery catheter having a lumen extending therethrough;
an elongate shaft slidably disposed within the lumen of the delivery catheter; and
an expandable implant including a proximal tubular portion and a distal tubular portion discontinuous with the proximal tubular portion;
wherein the distal tubular portion extends at least partially within an interior of the implant,
wherein the distal tubular portion includes a slot forming an opening extending from an interior surface of the distal tubular portion through a wall thereof to an exterior surface of the distal tubular portion.
2. The system of claim 1 , wherein the implant is actuatable from a collapsed delivery configuration to an expanded operational configuration.
3. The system of claim 2 , wherein a distal end of the elongate shaft extends through the proximal tubular portion and into the distal tubular portion in the collapsed delivery configuration.
4. The system of claim 3 , further including a coupling mechanism configured to releasably couple the implant to the elongate shaft.
5. The system of claim 4 , wherein the implant is non-rotatably coupled to the elongate shaft.
6. The system of claim 3 , further including a pull wire disposed within the lumen of the delivery sheath alongside the elongate shaft, the pull wire releasably connected to the proximal tubular portion by a releasable lock including a pin oriented laterally through the proximal tubular portion.
7. The system of claim 6 , wherein the pull wire includes first and second ends disposed adjacent a proximal end of the delivery sheath, and a portion of the pull wire extends over the pin to form a loop portion, the elongate shaft extending through the loop portion.
8. The system of claim 7 , wherein proximal tension on the pull wire with the elongate shaft disposed within the distal tubular portion maintains the implant in the collapsed delivery configuration.
9. The system of claim 8 , wherein axial withdrawal of the distal end of the elongate shaft through the loop portion releases the pull wire from the proximal tubular portion.
10. The system of claim 3 , wherein the implant is self-biased toward the expanded operational configuration.
11. The system of claim 10 , wherein the elongate shaft has a column strength that exceeds an axial force exerted on the distal end of the elongate shaft by a distal end of the implant in the collapsed delivery configuration.
12. The system of claim 1 , wherein the elongate shaft includes a lumen extending longitudinally therethrough; and
wherein the coupling mechanism includes a side port disposed in a wall of the elongate shaft, a bending plug disposed within the elongate shaft adjacent the side port, and a locking member slidably disposed within the lumen of the elongate shaft.
13. The system of claim 12 , wherein the locking member extends axially within the lumen of the elongate shaft, through the side port, and through the slot, thereby coupling the implant to the elongate sheath.
14. The system of claim 13 , wherein axial retraction of the locking member through the slot and the side port releases the implant from the elongate shaft without relative rotation between the implant and the elongate shaft.
15. The system of claim 1 , further including a handle disposed on a proximal end of the delivery catheter.
16. The system of claim 15 , wherein a proximal end of the elongate shaft is attached to a control element on the handle.