Stent for use following balloon angioplasty
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United States of America Patent
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-
Jan 3, 1989
Grant Date -
N/A
app pub date -
Jul 2, 1987
filing date -
Jul 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A stent for implanting in a blood vessel following balloon angioplasty to prevent restenosis. The stent is a helical coil of a shape memory alloy tape or wire. The coil has a diameter less than that of the blood vessel in which it is to be implanted. The tape or wire has previously been wound to form a helical coil having a diameter equal to or slightly greater than the inside diameter of said blood vessel, this coil is than heated to an elevated temperature for a time sufficient to fix the shape of the second mentioned coil in the memory of the tape or wire, cooled to ambient temperature and then rewound to form the first mentioned helical coil.
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