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公开(公告)号：US11458015B2
公开(公告)日：2022-10-04
申请号：US16791976
申请日：2020-02-14
发明人： Yidong M. Zhu , Erik Bulman , Baigui Bian , Sam Sok , Pu Zhou
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.
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公开(公告)号：US20200375736A1
公开(公告)日：2020-12-03
申请号：US16996776
申请日：2020-08-18
发明人： Yidong M. Zhu , Pu Zhou , Erik Bulman , Baigui Bian
摘要： The methods and devices disclosed herein promote temporal control of balloon inflation patterns. The devices include a covering for a portion of the balloon that compresses the balloon portion during the inflation process. This enables the distal portion of a balloon to be inflated prior to the proximal portion of a balloon, creating a tapered shape at lower inflation pressures. This is especially useful during transvascular implantation procedures, as it prevents dislodgement of an implant mounted on the balloon. As inflation continues, pressure exerted on the balloon by the covering is overcome such that the proximal region of the balloon inflates, forming a shape with generally straighter sides than the tapered shape, thereby expanding the cardiovascular device.
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公开(公告)号：US10799685B2
公开(公告)日：2020-10-13
申请号：US15914748
申请日：2018-03-07
发明人： Pu Zhou , Erik Bulman , Baigui Bian
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.
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公开(公告)号：US10751176B2
公开(公告)日：2020-08-25
申请号：US15248517
申请日：2016-08-26
发明人： Yidong M. Zhu , PU Zhou , Erik Bulman , Baigui Bian
摘要： The methods and devices disclosed herein promote temporal control of balloon inflation patterns. The devices include a covering for a portion of the balloon that compresses the balloon portion during the inflation process. This enables the distal portion of a balloon to be inflated prior to the proximal portion of a balloon, creating a tapered shape at lower inflation pressures. This is especially useful during transvascular implantation procedures, as it prevents dislodgement of an implant mounted on the balloon. As inflation continues, pressure exerted on the balloon by the covering is overcome such that the proximal region of the balloon inflates, forming a shape with generally straighter sides than the tapered shape, thereby expanding the cardiovascular device.
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公开(公告)号：US10391281B2
公开(公告)日：2019-08-27
申请号：US16149671
申请日：2018-10-02
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 K. Gowdar , Yong Gao , David D. Williams
摘要： A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.
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公开(公告)号：US10391280B2
公开(公告)日：2019-08-27
申请号：US16149650
申请日：2018-10-02
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 K. Gowdar , Yong Gao , David D. Williams
摘要： A delivery sheath includes an outer tubular layer and an initially folded inner tubular layer. When an implant passes therethrough, the outer tubular layer expands and the inner tubular layer unfolds into an expanded lumen diameter. The sheath may also include selectively placed longitudinal support rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion, thereby reducing the push force needed to advance the implant through the sheath's lumen.
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公开(公告)号：US20180256858A1
公开(公告)日：2018-09-13
申请号：US15914748
申请日：2018-03-07
发明人： Pu Zhou , Erik Bulman , Baigui Bian
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.
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