Non-buckling thin-walled sheath for the percutaneous insertion of intraluminal catheters
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United States of America Patent
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Jan 19, 1993
Grant Date -
N/A
app pub date -
May 1, 1990
filing date -
May 1, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An introducer sheath includes an extremely thin, flat wire metal coil that is surrounded only on its exterior surface with a plastic tube or coating. The flat wire coil optimizes the resistance of the sheath to buckling while minimizing the wall thickness of the sheath. The plastic covering being only on the outside of the metal coil optimizes the thinness of the introducer sheath wall while still providing a smooth outer surface for easy percutaneous insertion into an artery or other vessel of a living body. The higher density of the metal coil as compared to the plastic tubes of existing introducer sheaths, maximizes the radiopacity of the sheath for this thin-walled design. An alternative embodiment consists of two flat wire metal coils, one wound over the other, with a plastic covering the outer surface of the outer metal coil.
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