Abstract: An in-situ fenestration device. The device includes a sheath, a sonic catheter extending with the sheath and having a cutting tool at a distal section thereof, and a balloon catheter extending within the sonic catheter. The cutting tool of the sonic catheter is configured to cut a fenestration in a graft material at a fenestration site of a stent graft upon being energized with ultrasonic energy at a cutting frequency.

Abstract: Aspects of the disclosure include delivery devices for transcatheter delivery of a cardiac implant. Delivery devices can include a handle assembly as well as a piston mount connected to the handle assembly and having a distal portion terminating at a nose cap. The distal portion includes a stop extending radially from and fixed to the distal portion. The delivery device further includes a capsule assembly including a biasing element for selectively sheathing the implant and a plurality of retraction members secured about a distal end of the biasing element to control deployment of the implant. In various examples, the biasing element is a helical compression spring and the implant is a prosthetic tricuspid heart valve. Methods of loading a delivery device and delivering an implant are also disclosed.