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US 8,739,384 B2Granted
Method for stent retention on a balloon catheter
AssigneeAbbott Cardiovascular Systems Inc.
InventorsYunbing Wang, Gregory Kilinski, Luis Vazquez
Life of this patent
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Abstract
A balloon is inflated from a collapsed configuration, then deflated. A polymeric stent is then disposed over the deflated balloon and the stent crimped to the balloon.
Claims13
A method of crimping a stent to a balloon, the balloon having pre-arranged folds when configured in a collapsed configuration, comprising:
- heating a polymer stent to a temperature of between 25 and 100 degrees Celsius, wherein a polymer of the stent has a glass transition temperature between 40 and 60 degrees Celsius;
- inflating the balloon a first time, then deflating the balloon such that the balloon forms a relaxed state wherein at least a portion of the pre-arranged folds are removed;
- partially crimping the heated stent to the balloon, followed by inflating the balloon a second time;
- and
- fully crimping the heated stent to the balloon.
2 more elements
A method of crimping a polymer stent to a balloon, the balloon having a shape memory including pre-arranged folds when configured in a collapsed configuration, comprising:
- working out the shape memory in the balloon including inflating and deflating the balloon, whereupon at least a portion of the pre-arranged folds are removed;
- and
- fully crimping the polymer stent to the deflated balloon, so that the polymer stent is crimped to the balloon when the balloon has the at least a portion of its pre-arranged folds removed.
A method of making a medical device, comprising the steps of:
- providing a balloon having pre-arranged folds;
- providing a stent made from poly(L-lactide);
- inflating the balloon, then deflating the balloon such that the balloon forms a relaxed state wherein at least a portion of the pre-arranged folds are removed;
- and
- using an iris or collet-type of crimping mechanism, crimping the stent to the balloon including the steps of crimping the stent to the balloon while the stent has a temperature of between 30 and 50 degrees Celsius;
- wherein the stent is crimped to the balloon while the balloon has the at least a portion of its pre-arranged folds removed.
3 more elements
Dependencies are inferred from the claim text.