- 专利标题: Expandable sheath with elastomeric cross sectional portions
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申请号: US16149947申请日: 2018-10-02
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公开(公告)号: US10537431B2公开(公告)日: 2020-01-21
- 发明人: Pu Zhou , Yong Gao , Erik Bulman , Baigui Bian , Yidong M. Zhu , David D. Williams , Timothy A. Geiser , Michael G. Valdez , Sonny Tran , Richard D. White , Thanh Huy Le , Tung T. Le , Alpana K. Gowdar
- 申请人: EDWARDS LIFESCIENCES CORPORATION
- 申请人地址: US CA Irvine
- 专利权人: Edwards Lifesciences Corporation
- 当前专利权人: Edwards Lifesciences Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Meunier Carlin & Curfman LLC
- 代理商 Joel B. German
- 主分类号: A61F2/24
- IPC分类号: A61F2/24 ; A61M25/06 ; A61M25/00 ; A61M25/01 ; A61F2/97
摘要:
An expandable introducer sheath for passage of implant delivery catheters, such as catheters for delivery of prosthetic heart valves. The expandable sheath balances the amounts, shapes and positions of various stiff and elastic structures in the sheath to selectively program the expandability and buckling stiffness of the sheath. The expandable sheath can include, for example, an expandable tubular layer that includes alternating stiff and elastic wall portions of a single radial thickness. The combination of stiff and elastic wall portions allow for torque and push strength to advance the expandable sheath while at the same time accommodating temporary expansion. The expandable sheath can also be reinforced with a tubular layer of braided fibers or a stent structure for additional strength. Other embodiments include selective use of slots or gaps at the distal end of a stiff wall portion to enhance expandability and distribute strain.
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