Dual valve, flexible sheath and method
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United States of America Patent
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Nov 25, 2003
Issued Date -
N/A
app pub date -
Jul 23, 2001
filing date -
Dec 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A large-diameter sheath and assembly for use in introducing a catheter or other medical device into a vessel of the body of a patient. The sheath comprises an elongate sheath tube formed of a flexible material which has proximal and distal extremities and a passage extending therethrough of a predetermined maximum diameter. The sheath tube may either be expandable, with the distal extremity folded longitudinally to a smaller folded diameter, or of a constant diameter. If expandable, the sheath tube may be self-expanding or may be reinforced with a self-expanding wire or expandable stents. A backflow adapter is secured to the proximal extremity of the elongate sheath tube.
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