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    • 4. 发明授权
    • Heart valve delivery system with valve catheter
    • 带阀导管的心脏瓣膜输送系统
    • US08167932B2
    • 2012-05-01
    • US11252657
    • 2005-10-18
    • Henry BourangThanh Huy LeDavid M. TaylorSam SokMario IobbiRajesh KhannaDave J. Evans
    • Henry BourangThanh Huy LeDavid M. TaylorSam SokMario IobbiRajesh KhannaDave J. Evans
    • A61F2/24A61F2/06
    • A61F2/243A61F2/2418A61F2/2433A61F2/2436A61F2/2439A61F2002/9583
    • A heart valve delivery system is provided wherein a prosthetic valve is carried on a valve catheter inside a delivery sleeve. A step balloon protrudes from the delivery sleeve and provides a tapered surface for facilitating advancement through a body vessel. The step balloon also aids in crossing the leaflets of a native valve. After the prosthetic valve is positioned within the native valve, the delivery sleeve is retracted to expose the prosthetic valve. In one embodiment, the delivery sleeve is retracted by the use of a lead screw, which effectuates relative movement between the valve catheter and delivery sleeve. The prosthetic valve is preferably self-expandable. If necessary, the step balloon may be expanded to securely seat the prosthetic valve at the site of the native valve. The prosthetic valve is preferably coupled to the valve catheter by a plurality of flexible extension arms which allow the prosthetic valve to be collapsed after initial deployment such that the prosthetic valve may be repositioned if necessary.
    • 提供心脏瓣膜输送系统,其中人造瓣膜被携带在输送套筒内的阀导管上。 步进气球从输送套筒突出并提供锥形表面,以便于通过身体血管进入。 阶梯气球还有助于穿过天然瓣膜的小叶。 在人工瓣膜定位在天然瓣膜内之后,输送套筒缩回以露出假体瓣膜。 在一个实施例中,输送套筒通过使用导螺杆缩回,其实现了阀导管和输送套筒之间的相对运动。 假体瓣膜优选是可自膨胀的。 如果需要,可以扩展踏板气囊以将人工瓣膜牢固地安置在天然瓣膜的位置。 假体瓣膜优选地通过多个柔性延伸臂联接到瓣膜导管,所述多个柔性延伸臂允许假肢瓣膜在初始部署之后被折叠,使得如果必要,可以重新定位假体瓣膜。
    • 6. 发明申请
    • System for percutaneous delivery and removal of a prosthetic valve
    • 用于经皮输送和移除假体瓣膜的系统
    • US20070239254A1
    • 2007-10-11
    • US11400063
    • 2006-04-07
    • Chris ChiaRajesh KhannaPhilippe MarchandDavid Taylor
    • Chris ChiaRajesh KhannaPhilippe MarchandDavid Taylor
    • A61F2/06
    • A61F2/2436A61B2017/22035A61B2017/2215A61F2002/9528
    • A valve-retrieval device permits a non-deployed valve mounted on a balloon catheter to be retracted back into an introducer sheath for removal from a patient's body. In particular embodiments, the valve-retrieval device is adapted to be placed on a balloon catheter shaft and then advanced over the shaft into the blood vessel via the introducer sheath. The valve-retrieval device has an expandable distal end portion that assumes an expanded shape when advanced out of the introducer sheath. The valve is positioned within or adjacent the distal end portion of the retrieval device, and the retrieval device and the balloon catheter are retracted together back into the introducer sheath. The distal end portion of the retrieval device, rather than the outer surface portion of the valve covered thereby, contacts the distal end and inner surface of the introducer sheath to facilitate retraction of the valve into the introducer sheath.
    • 瓣膜取出装置允许安装在气囊导管上的未展开的瓣膜回缩到导引器护套中以从患者身体移除。 在具体实施例中,瓣膜取出装置适于放置在球囊导管轴上,然后通过导引器鞘在轴上方进入血管。 瓣膜取出装置具有可伸展的远端部分,当伸出引导器护套时,该顶端部呈展开形状。 所述阀位于所述取出装置的远端部分内或邻近所述取出装置的远端部分,并且所述取出装置和所述气囊导管一起缩回到所述导引器鞘中。 取出装置的远端部分而不是由其覆盖的阀的外表面部分接触引导器护套的远端和内表面,以便于将瓣膜收回到引导器护套中。
    • 7. 发明申请
    • Heart valve delivery system with valve catheter
    • 带阀导管的心脏瓣膜输送系统
    • US20070088431A1
    • 2007-04-19
    • US11252657
    • 2005-10-18
    • Henry BourangThanh LeDavid TaylorSam SokMario IobbiRajesh KhannaDave Evans
    • Henry BourangThanh LeDavid TaylorSam SokMario IobbiRajesh KhannaDave Evans
    • A61F2/24
    • A61F2/243A61F2/2418A61F2/2433A61F2/2436A61F2/2439A61F2002/9583
    • A heart valve delivery system is provided wherein a prosthetic valve is carried on a valve catheter inside a delivery sleeve. A step balloon protrudes from the delivery sleeve and provides a tapered surface for facilitating advancement through a body vessel. The step balloon also aids in crossing the leaflets of a native valve. After the prosthetic valve is positioned within the native valve, the delivery sleeve is retracted to expose the prosthetic valve. In one embodiment, the delivery sleeve is retracted by the use of a lead screw, which effectuates relative movement between the valve catheter and delivery sleeve. The prosthetic valve is preferably self-expandable. If necessary, the step balloon may be expanded to securely seat the prosthetic valve at the site of the native valve. The prosthetic valve is preferably coupled to the valve catheter by a plurality of flexible extension arms which allow the prosthetic valve to be collapsed after initial deployment such that the prosthetic valve may be repositioned if necessary.
    • 提供心脏瓣膜输送系统,其中人造瓣膜被携带在输送套筒内的阀导管上。 步进气球从输送套筒突出并提供锥形表面,以便于通过身体血管进入。 阶梯气球还有助于穿过天然瓣膜的小叶。 在人工瓣膜定位在天然瓣膜内之后,输送套筒缩回以露出假体瓣膜。 在一个实施例中,输送套筒通过使用导螺杆缩回,其实现了阀导管和输送套筒之间的相对运动。 假体瓣膜优选是可自膨胀的。 如果需要,可以扩展踏板气囊以将人工瓣膜牢固地安置在天然瓣膜的位置。 假体瓣膜优选地通过多个柔性延伸臂联接到瓣膜导管,所述多个柔性延伸臂允许假肢瓣膜在初始部署之后被折叠,使得如果必要,可以重新定位假体瓣膜。
    • 8. 发明授权
    • Dynamic NOR gates for NAND decode
    • 用于NAND解码的动态NOR门
    • US6081136A
    • 2000-06-27
    • US993335
    • 1997-12-19
    • Rajesh KhannaHamid Partovi
    • Rajesh KhannaHamid Partovi
    • H03K19/096H03K19/003
    • H03K19/0963
    • A NOR gate pair includes a first and second NOR gate, each with a plurality of inputs and an output. A first NAND gate has a first input coupled to the output of the first NOR gate, a second input coupled to the output of the second NOR gate through a first input inverter, and an output. A second NAND gate has a first input coupled to the output of the second NOR gate, a second input coupled to the output of the first NOR gate through a second input inverter, and an output. A first output inverter is coupled to the output of the first NAND gate and a second output inverter is coupled to the output of the second NAND gate. This configuration assures that NOR gates used in a one-hot-decode decoder will all have logic-low outputs during a precharge phase.
    • NOR门对包括第一和第二NOR门,每个具有多个输入和输出。 第一NAND门具有耦合到第一或非门的输出的第一输入端,通过第一输入反相器耦合到第二或非门的输出的第二输入和输出。 第二与非门具有耦合到第二或非门的输出的第一输入,通过第二输入反相器耦合到第一或非门的输出的第二输入和输出。 第一输出反相器耦合到第一NAND门的输出,第二输出反相器耦合到第二NAND门的输出。 该配置确保在一个热解码解码器中使用的或非门将在预充电阶段期间都具有逻辑低输出。