Shape memory effect surgical needles
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United States of America Patent
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Jun 15, 1993
Grant Date -
N/A
app pub date -
Aug 29, 1991
filing date -
Aug 29, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Surgical needles are fabricated from a shape memory alloy. The alloy has a low temperature state, in which the needle is formable into an elongated shape to pass through an elongated tube, and a high temperature state, in which the needle forms an arc. The needle is particularly adapted for use in endoscopic surgery. A needle that has a remembered curved shape is straightened and passed to a surgical site through a cannula. It is then returned to its curved shape by heating it at the surgical site. After use, it is withdrawn through the cannula.
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