Method and apparatus for direct laser cutting of metal stents
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United States of America Patent
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Apr 9, 2002
Issued Date -
N/A
app pub date -
Oct 13, 2000
filing date -
Nov 28, 1994
priority date (Note) -
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Abstract
An improved expandable stent for implantation in a body lumen, such as an artery, and an improved method for making it from a single length of tubing. The stent consists of a plurality of radially expandable cut cylindrical elements generally aligned on a common axis and interconnected by one or more interconnective elements, the elements having a rectangular cross-section from cut-to-cut. The individual radially expandable cylindrical elements are disposed in an undulating pattern. The stent is manufactured by direct laser cutting from a single metal tube using a finely focused laser beam passing through a coaxial gas jet structure to impinge on the working surface of the tube as the linear and rotary velocity of the tube is precisely controlled.
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