Endoprosthesis for controlled contraction and expansion
First Claim
1. An endoprosthesis, comprisinga generally tubular scaffolding body configured to have a compressed diameter and an expanded diameter,the body having a first subcomponent having a first geometry and defining a first bias when in a first range of diameter between the compressed and expanded diameters,the body having a second subcomponent having a second geometry different from the first geometry, the second subcomponent defining a second bias when in a second range of diameter between the first range and the expanded diameter, wherein the second bias is expansive and has a greater expansive magnitude than the first bias.
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Abstract
An endoprosthesis that has an interconnected series of struts, selected strut members connected to adjacent strut members at a longitudinal apex. Strut members include a first end portion, an intermediate portion hingedly connected to the first end portion, and a second end portion hingedly connected to the intermediate portion and extending to the apex. Some of the strut members can have a nesting feature configured for nestingly receiving another strut member when the endoprosthesis is in the delivery condition. A scaffolding body of the endoprosthesis can have an inner and outer component, each having a set of interconnected strut members which overlap those of the other to define a cooperating cell pattern. Also, the endoprosthesis can be configured to naturally tend to contract when the body is smaller than a predetermined diameter and expand when the body is larger than a predetermined diameter.
136 Citations
13 Claims
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1. An endoprosthesis, comprising
a generally tubular scaffolding body configured to have a compressed diameter and an expanded diameter, the body having a first subcomponent having a first geometry and defining a first bias when in a first range of diameter between the compressed and expanded diameters, the body having a second subcomponent having a second geometry different from the first geometry, the second subcomponent defining a second bias when in a second range of diameter between the first range and the expanded diameter, wherein the second bias is expansive and has a greater expansive magnitude than the first bias.
Specification