Stent system

A stent system, comprising:

• a self-expanding endoprosthesis configured to shift from a radially collapsed configuration to a radially expanded configuration, wherein the self-expanding endoprosthesis is configured to exert a first radially outward force in the radially collapsed configuration;
• and
• a stent delivery system, comprising:
• an elongate shaft comprising an inflatable balloon disposed proximate a distal end of the elongate shaft, wherein the inflatable balloon is configured to shift between a deflated configuration and an inflated configuration;
• wherein the self-expanding endoprosthesis is configured to be disposed on the inflatable balloon in the radially collapsed configuration with the inflatable balloon in the deflated configuration;
• and
• an endoprosthesis retention element disposed around the self-expanding endoprosthesis in the radially collapsed configuration and the inflatable balloon in the deflated configuration;
• wherein the endoprosthesis retention element is configured to constrain the self-expanding endoprosthesis in the radially collapsed configuration;
• wherein the endoprosthesis retention element is configured to fracture when a second radially outward force greater than the first radially outward force is applied to an inner surface of the endoprosthesis retention element.

A stent system, comprising:

• a self-expanding endoprosthesis configured to shift from a radially collapsed configuration to a radially expanded configuration;
• and
• a stent delivery system, comprising:
• an elongate shaft comprising an inflatable balloon disposed proximate a distal end of the elongate shaft, wherein the inflatable balloon is configured to shift between a deflated configuration and an inflated configuration;
• wherein the self-expanding endoprosthesis is configured to be disposed on the inflatable balloon in the radially collapsed configuration with the inflatable balloon in the deflated configuration;
• and
• an endoprosthesis retention element comprising a tubular sleeve disposed radially outward of and in intimate contact with the self-expanding endoprosthesis, wherein the endoprosthesis retention element is configured to constrain the self-expanding endoprosthesis in the radially collapsed configuration on the inflatable balloon when the inflatable balloon is in the deflated configuration;
• wherein the tubular sleeve is configured to break apart when the inflatable balloon is shifted from the deflated configuration toward the inflated configuration.