Method of manufacture of a heart valve support frame
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United States of America Patent
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Jan 15, 2008
Grant Date -
Jul 14, 2005
app pub date -
Jan 3, 2005
filing date -
Sep 20, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods for forming a support frame for flexible leaflet heart valves from a starting blank include converting a two-dimensional starting blank into the three-dimensional support frame. The material may be superelastic, such as NITINOL, and the method may include bending the 2-D blank into the 3-D form and shape setting it. A merely elastic material such as ELGILOY may be used and plastically deformed in stages, possibly accompanied by annealing, to obtain the 3-D shape. Alternatively, a tubular blank could be formed to define a non-tubular shape, typically conical. A method for calculating the precise 2-D blank shape is also disclosed. A mandrel assembly includes a mandrel and ring elements for pressing the blank against the external surface of the mandrel prior to shape setting.
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