Highly elastic, adjustable helical coil stent
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 22, 2000
Grant Date -
N/A
app pub date -
May 4, 1995
filing date -
May 4, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A highly elastic, adjustable helical coil stent (10) has a helical coil (20) which can be contracted around a small diameter catheter (12) for percutaneous insertion into a human body and then can be remotely expanded back to its original shape when positioned at the desired location within the human body. The helical coil is preferably formed of a metal alloy (25) with high elasticity, such as superelastic Nitinol, encased within an elastomer (26). The helical coil is affixed at its distal end to a catheter and affixed at its proximal end to a control tube (30). By rotating the control tube in one direction relative to the catheter (e.g., clockwise), the helical coil contracts and by rotating the control tube in the opposite direction (e.g., counterclockwise), the helical coil expands. The adjustable helical coil stent of the present invention is particularly useful for total or partial heart assist during heart bypass procedures. It can also be used, for example, as a stent for damaged blood vessels or other body conduits in either humans or animals.
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