Devices and methods for delivery and deployment of balloon expandable transcatheter valves

A balloon catheter for deploying a prosthetic heart valve through balloon inflation, comprising:

• an inner shaft defining a guidewire lumen;
• an outer shaft surrounding the inner shaft defining an inflation lumen between the outer shaft and the inner shaft;
• a distal portion at a distal end of the outer shaft;
• a balloon disposed at the distal portion such that fluid delivered to the balloon via the inflation lumen causes the balloon to inflate;
• a proximal multipart retention bumper secured to the inner shaft inside the balloon and configurable in an interlocked configuration and a non-interlocked configuration, the proximal multipart retention bumper including a proximal inner wedge and a proximal outer bumper;
• and
• a distal multipart retention bumper secured to the inner shaft inside the balloon and configurable in an interlocked configuration and a non-interlocked configuration, the distal multipart retention bumper including a distal inner wedge and a distal outer bumper.

A method of assembling a balloon catheter adapted for deploying a prosthetic heart valve through balloon inflation, the method comprising:

• disposing a proximal inner wedge and a distal inner wedge over an inner shaft of the balloon catheter at a distal portion of the inner shaft;
• securing a proximal outer bumper and a distal outer bumper to the inner shaft of the balloon catheter at the distal portion of the inner shaft;
• securing a proximal opening of a balloon to a distal end of an outer shaft of the balloon catheter;
• positioning a balloon of the balloon catheter over the proximal inner wedge and the proximal outer bumper by passing the proximal inner wedge and the proximal outer bumper into the balloon via a distal opening of the balloon;
• interlocking the proximal inner wedge and the proximal outer bumper to form a proximal multipart retention bumper;
• positioning that balloon over the distal inner wedge and the distal outer bumper by passing the distal inner wedge and the distal outer bumper into the balloon via a distal opening of the balloon;
• interlocking the distal inner wedge and the distal outer bumper to form a distal multipart retention bumper;
• and
• securing the balloon to a distal tip of the balloon catheter.