Dual valve, flexible expandable sheath and method
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United States of America Patent
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Aug 10, 1999
Issued Date -
N/A
app pub date -
Aug 1, 1997
filing date -
Dec 13, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A sheath assembly for use in introducing a catheter or other medical instrument into a vessel in the body of a patient. The sheath assembly includes an outer tubular member and an inner tubular member with a conically shaped cap at its distal end. A locking mechanism prevents advancement of the inner tubular member and associated cap in a distal direction of the vessel of the patient independent of the outer tubular member, but allows free movement of the inner tubular member in the proximal direction independent of the outer tubular member.
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