Dual valve, flexible expandable sheath and method
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United States of America Patent
Stats
-
Oct 26, 2004
Issued Date -
N/A
app pub date -
Mar 1, 2001
filing date -
Dec 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sheath for use in introducing a catheter or other medical instrument into a vessel in the body of a patient. The sheath includes an elongate sheath tube formed of a flexible material which has proximal and distal extremities and a passage extending therethrough A backflow adapter is secured to the proximal extremity of the elongate sheath tube. The backflow adapter has a central opening therein in registration with the passage in the sheath tube. A normally closed primary valve is disposed in the central opening of the backflow adapter and is movable le to an open position. A normally open secondary valve, movable to a closed position, may be configured in the backflow adapter proximal the sheath tube and distal the primary valve. The primary and secondary valves when open permit a catheter or other medical instrument to be inserted into the sheath.
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