发明名称 |
Dual valve reinforced sheath and method |
摘要 |
A large-diameter expandable sheath for use in introducing a catheter or other medical instrument into a vessel in the body of a patient. The expandable sheath comprises an elongate sheath tube formed of a flexible material which has proximal and distal extremities and a passage extending therethrough of a maximum predetermined diameter. The distal extremity of the elongate sheath tube is folded longitudinally to a smaller folded diameter. 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. 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 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, and when closed form a hemostatic seal about the catheter. A sheath introducer is provided for guiding the distal end of the sheath tube into a vessel and is configured to be positioned within the backflow adapter. |
申请公布号 |
AU7634594(A) |
申请公布日期 |
1995.03.14 |
申请号 |
AU19940076345 |
申请日期 |
1994.08.18 |
申请人 |
ENDOVASCULAR TECHNOLOGIES, INC. |
发明人 |
DINAH B. QUIACHON;STEVE G. BAKER;DAVID C. DILLOW;RONALD G. WILLIAMS;WESLEY D. STERMAN |
分类号 |
A61B17/34;A61M25/00;A61M25/06;A61M39/06 |
主分类号 |
A61B17/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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