Method for producing tubing useful as a tapered vascular graft prosthesis
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United States of America Patent
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Sep 18, 1990
Grant Date -
N/A
app pub date -
Apr 6, 1989
filing date -
Apr 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
PTFE vascular tubing is guided on to a tapered ultrasonic horn as the horn is oscillating at a high frequency. This action causes the end of the tubing moved onto the horn to expand. The expanded tubing is then positioned on a mandrel having a desired shape, such as tapered, and resintered. The finished tubing with an expanded diameter on one end and a non-expanded diameter on the other end is then removed from the mandrel, and is ready for use. Untapered tubing can also be radially expanded by this method to provide a thinner wall.
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