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 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;
• and
• a distal first retention bumper secured to the inner shaft, the distal first retention bumper including a spoked first portion including a first hub and first spokes defining first flow passages therebetween and a first tapered portion including first tapered spokes aligning with the first spokes.

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

• securing a distal retention bumper to an inner shaft defining a guidewire lumen;
• positioning a balloon over the distal retention bumper by inserting the distal retention bumper and inner shaft into a balloon opening;
• securing an outer shaft to surround the inner shaft and define an inflation lumen between the outer shaft and the inner shaft;
• securing the balloon opening to the outer shaft such that fluid delivered to the balloon via the inflation lumen causes the balloon to inflate;
• and
• securing a crimped prosthetic heart valve over the balloon.