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    Expandable sheath
    11.
    发明授权
    Expandable sheath 有权

    公开(公告)号：US10792471B2

    公开(公告)日：2020-10-06

    申请号：US14880109

    申请日：2015-10-09

    申请人： Edwards Lifesciences Corporation

    发明人： Pu Zhou ,  Erik Bulman ,  Timothy A. Geiser ,  Michael G. Valdez ,  Yidong M. Zhu ,  Baigui Bian ,  Sonny Tran ,  Richard D. White ,  Thanh Huy Le ,  Tung T. Le ,  Alpana Kiran Gowdar

    IPC分类号： A61M25/06 ,  A61F2/24 ,  A61F2/958 ,  A61M25/00 ,  A61F2/01

    摘要： A delivery sheath includes an elastic outer tubular layer and an inner tubular layer having a thick wall portion integrally connected to a thin wall portion. The inner tubular layer can have a compressed or folded condition wherein the thin wall portion folds onto an outer surface of the thick wall portion under urging of the elastic outer tubular layer. When an implant passes therethrough, the outer tubular layer stretches and the inner tubular layer unfolds into an expanded lumen diameter. Once the implant passes, the outer tubular layer again urges the inner tubular layer into the compressed condition with the sheath reassuming its smaller profile. The sheath may also include selectively placed longitudinal rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion and collapse, thereby reducing the push force needed to advance the implant through the sheath's lumen.

    EXPANDABLE SHEATH WITH ELASTOMERIC CROSS SECTIONAL PORTIONS
    13.
    发明申请
    EXPANDABLE SHEATH WITH ELASTOMERIC CROSS SECTIONAL PORTIONS 审中-公开
    具有弹性横截面部分的可膨胀的管道

    公开(公告)号：US20160296332A1

    公开(公告)日：2016-10-13

    申请号：US14880111

    申请日：2015-10-09

    申请人： Edwards Lifesciences Corporation

    发明人： Pu Zhou ,  Yong Gao ,  Erik Bulman ,  Baigui Bian ,  Yidong M. Zhu ,  David D. Williams

    IPC分类号： A61F2/24 ,  A61F2/966

    CPC分类号： A61F2/2427 ,  A61F2/97 ,  A61F2250/0018 ,  A61M25/0023 ,  A61M25/0052 ,  A61M25/0054 ,  A61M25/01 ,  A61M25/0662 ,  A61M25/0668 ,  A61M2025/0024 ,  A61M2025/0681

    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.

    摘要翻译： 用于植入物输送导管（例如用于输送假体心脏瓣膜的导管）通过的可扩张的导引鞘。 可扩张护套平衡护套中各种刚性和弹性结构的数量，形状和位置，以选择性地编程护套的可膨胀性和屈曲刚度。 可膨胀护套可以包括例如可膨胀管状层，其包括单个径向厚度的交替的刚性和弹性壁部分。 刚性和弹性壁部分的组合允许扭矩和推动强度推进可膨胀护套，同时容纳临时膨胀。 可膨胀护套还可以用编织纤维的管状层或用于附加强度的支架结构来增强。 其他实施例包括在刚性壁部分的远端选择性地使用槽或间隙以增强可扩展性和分布应变。

    EXPANDABLE SHEATH WITH EXTRUDED SEGMENTS
    14.
    发明申请
    EXPANDABLE SHEATH WITH EXTRUDED SEGMENTS 有权

    公开(公告)号：US20220401216A1

    公开(公告)日：2022-12-22

    申请号：US17895945

    申请日：2022-08-25

    申请人： Edwards Lifesciences Corporation

    发明人： Baigui Bian ,  Erik Bulman ,  Timothy A. Geiser

    IPC分类号： A61F2/24

    摘要： The expandable sheaths disclosed herein include an elastic outer tubular layer and a multisegmented inner tubular layer that includes at least two coextruded segments having different durometers and different coefficients of friction. The inner tubular layer further includes a thick wall portion integrally connected to a thin wall portion. The thin wall portion has a lower durometer than the thick wall portion. The thick wall portion has a first and second longitudinally extending end, and the thin wall portion extends between the first and second longitudinally extending ends. The elastic outer tubular layer and the inner tubular layer are radially movable between a non-expanded state, where the elastic outer tubular layer urges the first longitudinally extending end under the second longitudinally extending end, and an expanded state, where the first and second longitudinally extending ends of the inner tubular layer expand apart with the thin wall portion extending therebetween.

    EXPANDABLE SHEATH WITH LONGITUDINALLY EXTENDING REINFORCING MEMBERS
    15.
    发明申请
    EXPANDABLE SHEATH WITH LONGITUDINALLY EXTENDING REINFORCING MEMBERS 有权

    公开(公告)号：US20210023344A1

    公开(公告)日：2021-01-28

    申请号：US17068632

    申请日：2020-10-12

    申请人： Edwards Lifesciences Corporation

    发明人： Pu Zhou ,  Erik Bulman ,  Baigui Bian

    IPC分类号： A61M25/06 ,  A61M25/00 ,  A61F2/24

    摘要： An expandable delivery sheath includes an elastic outer tubular layer and an inner tubular layer. The inner tubular layer include a thick wall portion integrally connected to a thin wall portion. The thin wall portion can include longitudinal reinforcing members/rods that facilitate unfolding during the passage of the implant, thus decreasing the push force and increasing the consistency of the push force. The inner tubular layer can have a non-expanded or folded condition wherein the thin wall portion folds onto an outer surface of the thick wall portion under urging of the elastic outer tubular layer. When an implant passes therethrough, the outer tubular layer stretches and the inner tubular layer unfolds into an expanded lumen diameter. Once the implant passes, the outer tubular layer again urges the inner tubular layer into the non-expanded condition with the sheath reassuming its smaller profile.

    PERFUSION BALLOON DESIGN
    16.
    发明申请
    PERFUSION BALLOON DESIGN 审中-公开

    公开(公告)号：US20200179116A1

    公开(公告)日：2020-06-11

    申请号：US16791976

    申请日：2020-02-14

    申请人： Edwards Lifesciences Corporation

    发明人： Yidong M. Zhu ,  Erik Bulman ,  Baigui Bian ,  Sam Sok ,  Pu Zhou

    IPC分类号： A61F2/24 ,  A61M25/10

    摘要： Disclosed herein are designs for improved inflatable structures for use during minimally invasive cardiovascular procedures. These inflatable structures facilitate the perfusion of blood through an anatomical structure, such as a heart valve, during the cardiovascular procedure. The inflatable structures are formed of a plurality of balloons arranged radially around a central location. The plurality of balloons form a lumen through which blood flows. Each balloon of the plurality is shaped or configured to stabilize the adjacent balloons, limiting their movement relative to each other. For example, some embodiments can feature balloons with a keystone shape that limits movement of the balloons inward toward the lumen. Some implementations can also include a support coil running through the lumen. The support coil holds enables the lumen to be open to perfusion even in the early stages of balloon inflation.

    EXPANDABLE SHEATH WITH ELASTOMERIC CROSS SECTIONAL PORTIONS
    18.
    发明申请
    EXPANDABLE SHEATH WITH ELASTOMERIC CROSS SECTIONAL PORTIONS 审中-公开

    公开(公告)号：US20190321175A1

    公开(公告)日：2019-10-24

    申请号：US16407057

    申请日：2019-05-08

    申请人： Edwards Lifesciences Corporation

    发明人： Pu Zhou ,  Yong Gao ,  Erik Bulman ,  Baigui Bian ,  Yidong M. Zhu ,  David Delon Williams

    IPC分类号： A61F2/24 ,  A61M25/00 ,  A61M25/01 ,  A61M25/06

    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.