Introducer sheath with irregular outer surface
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United States of America Patent
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-
Jun 13, 1995
Grant Date -
N/A
app pub date -
May 17, 1994
filing date -
May 17, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An introducer sheath for insertion into a patient's vascular system is provided having an irregular, undulating outer surface to interface with the irregular surface formed by the invasive procedure of inserting the sheath into a blood vessel. The sheath includes a helical coil member formed of continuous turns of spiral wound flat wire and a plastic sleeve surrounding the coil. Each turn of the coil is spaced apart from a next adjacent turn sufficiently to define therebetween an interstice wide enough to allow the plastic sleeve to be constricted into the interstices between the turns. A corresponding undulating outer surface is thereby formed to interface with a wall of blood vessel to minimize blood leakage therefrom. In the preferred embodiment, a lubricated inner plastic tube is proved, and a distal portion of the sheath surface has a smooth configuration.
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