公开(公告)号：US06875197B1

公开(公告)日：2005-04-05

申请号：US09713384

申请日：2000-11-14

Applicant: Murthy V. Simhambhatla ,  Robert P. Saltman

Inventor： Murthy V. Simhambhatla ,  Robert P. Saltman

IPC: A61F2/958 ,  A61M25/00 ,  A61M29/00 ,  A61M29/02 ,  A61M31/00 ,  A61M37/00

CPC classification number: A61L29/06 ,  A61M25/1006 ,  A61M25/1029 ,  A61M25/104 ,  A61M2025/1086 ,  A61M2025/1088

Abstract: A dimensionally stable and growth controlled inflatable member formed by adding a multifunctional agent to a soft polymer to form a compound, extruding an inflatable member from the compound, and crosslinking the compound. The inflatable member is configured to be formed-in-place with a body lumen. Preferably, the inflatable member is blown to a working diameter prior to use and then heated to the glass transition temperature of the polymer to shrink the diameter of the blown inflatable member back to about the nominal diameter of the tubing. In another embodiment, the invention is a dimensionally stable and growth controlled inflatable member comprising longitudinal zones of crosslinked material symmetrically spaced about the circumference of the inflatable member and a uniform working diameter. Preferably, there are three or more longitudinal zones that run the working length of the inflatable member. The selectively irradiated inflatable members are formed in a mold having symmetrically spaced longitudinal windows.

Abstract translation: 通过向软质聚合物中添加多官能剂以形成化合物，从化合物挤出可膨胀构件，并使化合物交联而形成尺寸稳定和生长控制的可膨胀构件。 可膨胀构件构造成与体腔成形就位。 优选地，可充气构件在使用之前被吹送到工作直径，然后被加热到聚合物的玻璃化转变温度，以将吹制的可充气构件的直径收缩回到管道的公称直径。 在另一个实施方案中，本发明是尺寸稳定和生长控制的可膨胀构件，其包括围绕可膨胀构件的圆周对称地间隔的交联材料的纵向区域和均匀的加工直径。 优选地，存在延伸可膨胀构件的工作长度的三个或更多个纵向区域。 选择性照射的充气构件形成在具有对称间隔的纵向窗口的模具中。

公开(公告)号：US06620128B1

公开(公告)日：2003-09-16

申请号：US09693063

申请日：2000-10-20

Applicant: Murthy V. Simhambhatla

Inventor： Murthy V. Simhambhatla

IPC: A61M2900

CPC classification number: A61M25/1029 ,  B29C2049/4655

Abstract: A balloon for a balloon catheter and a method of manufacture The method entails providing a polymeric tubular member having an inner lumen and a longitudinal axis. An incompressible fluid is introduced into the inner lumen at a predetermined volumetric flow rate, expanding the polymeric tubular member to a desired outer diameter. The volumetric flow rate of fluid may be predetermined to not over-inflate the balloon. The balloon is blown slower because no initial pressure need be exceeded, so higher blow up ratios may be achieved without sacrificing any strength of the balloon. The balloons embodying features of the invention have thinner walls, yet maintain the same physical and mechanical properties of a thicker walled balloon manufactured in today's methods. Therefore, the process of the invention will lead to lower profile balloon catheters for balloon catheters with the same outer diameter balloon on them. Alternatively, a balloon with the same wall thickness as a balloon made from standard techniques will yield a much stronger balloon.

Abstract translation: 用于气囊导管的球囊和制造方法该方法需要提供具有内腔和纵向轴线的聚合物管状构件。 将不可压缩的流体以预定的体积流速引入内腔，将聚合物管状构件膨胀到期望的外径。 流体的体积流量可以被预先确定，以使气囊不会过度膨胀。 气球被吹得较慢，因为不需要超过初始压力，因此可以在不牺牲球囊的任何强度的情况下实现更高的吹胀比。 体现本发明特征的气球具有更薄的壁，但是在当今的方法中制造的较厚壁球囊保持相同的物理和机械性能。 因此，本发明的方法将导致用于具有相同外径球囊的球囊导管的下部轮廓导管。 或者，具有与由标准技术制成的球囊相同的壁厚的气球将产生更强的气球。

公开(公告)号：US08034361B2

公开(公告)日：2011-10-11

申请号：US11644771

申请日：2006-12-21

Applicant: Syed F. A. Hossainy ,  Murthy V. Simhambhatla

Inventor： Syed F. A. Hossainy ,  Murthy V. Simhambhatla

IPC: A61F13/00 ,  A61F2/00

CPC classification number: A61L31/16 ,  A61L31/10 ,  A61L2300/606 ,  A61L2300/62 ,  A61L2400/12

Abstract: Coatings for implantable medical devices including nanoparticles incorporating an active agent, and methods for fabricating the coatings.

Abstract translation: 用于可植入医疗装置的涂层，包括掺入活性剂的纳米颗粒，以及制造涂层的方法。

公开(公告)号：US07553292B2

公开(公告)日：2009-06-30

申请号：US11140240

申请日：2005-05-26

Applicant: Deborah L. Kilpatrick ,  Robert D. Ainsworth ,  Murthy V. Simhambhatla ,  Jeong S. Lee

Inventor： Deborah L. Kilpatrick ,  Robert D. Ainsworth ,  Murthy V. Simhambhatla ,  Jeong S. Lee

IPC: A61M29/00

CPC classification number: A61F2/958 ,  A61B2017/22081

Abstract: A method of treating vulnerable plaque comprising intentionally damaging or rupturing the vulnerable plaque using a wingless balloon which is inflated from a wingless unexpanded diameter to a limited expanded diameter. This process produces significant increase in ECM synthesis at the site of the damage or rupture. As a result, the method strengthens the vulnerable plaque while minimizing or avoiding damage to the surrounding wall of the body lumen or damaging a stable plaque mistakenly believed to be a vulnerable plaque. The method of the invention is particularly useful in treating a fibroatheroma type of vulnerable plaque. In one embodiment, the balloon is self-limiting such that it expands compliantly at initial inflation pressures, and above nominal pressure it expands noncompliantly. In an alternative embodiment, the balloon is inflated using a diameter-limiting device, such as a device which limits the inflation pressure or the volume of inflation fluid in the balloon.

Abstract translation: 一种治疗易损斑块的方法，包括使用从无翅未膨胀直径膨胀至有限扩张直径的无翼气球故意破坏或破裂易损斑块。 该过程在损伤或破裂部位产生ECM合成的显着增加。 因此，该方法可加强易损斑块，同时最大限度地减少或避免对体腔周围壁的损害或损坏被认为是易损斑块的稳定斑块。 本发明的方法特别可用于治疗纤维腺瘤型易损斑块。 在一个实施例中，气囊是自限制性的，使得其在初始充气压力下顺应地膨胀，并且在额定压力之上，其膨胀不顺利。 在替代实施例中，使用直径限制装​​置（例如限制气囊中的充气压力或膨胀流体的体积的装置）使球囊膨胀。

公开(公告)号：US06890395B2

公开(公告)日：2005-05-10

申请号：US10438525

申请日：2003-05-15

Applicant: Murthy V. Simhambhatla

Inventor： Murthy V. Simhambhatla

IPC: A61F2/82 ,  A61L27/00 ,  A61L27/16 ,  A61L29/00 ,  A61L29/04 ,  A61M25/00 ,  B29C47/88 ,  B29C53/40 ,  B29C53/42

CPC classification number: A61L27/16 ,  A61L29/041 ,  C08L23/06 ,  C08L2207/068 ,  Y10T156/1038 ,  Y10T428/1352 ,  Y10T428/139

Abstract: Medical devices having at least a component, such as a catheter balloon, stent cover and vascular graft, formed of ultrahigh molecular weight polyolefin, such as ultrahigh molecular weight polyethylene. The device component is formed from ultrahigh molecular weight polyethylene that has been processed so that it is microporous and has an oriented node and fibril structure. The device component expands compliantly at low strains and are substantially less compliant at higher strains. The invention also comprises methods for making such medical devices, including the steps of compacting a polyethylene powder and deforming it to impart the oriented structure.

Abstract translation: 至少具有由超高分子量聚烯烃（例如超高分子量聚乙烯）形成的至少一种成分的医疗装置，例如导管球囊，支架盖和血管移植物。 该器件组件由超高分子量聚乙烯形成，该聚乙烯已被加工成微孔并具有取向的节点和原纤维结构。 器件部件在低应变下易于扩展，并且在较高应变下基本不太顺应。 本发明还包括制造这种医疗装置的方法，包括压制聚乙烯粉末并变形以赋予定向结构的步骤。

公开(公告)号：US06761786B2

公开(公告)日：2004-07-13

申请号：US10165916

申请日：2002-06-10

Applicant: Murthy V. Simhambhatla ,  Robert D. Ainsworth ,  Robert P. Saltman

Inventor： Murthy V. Simhambhatla ,  Robert D. Ainsworth ,  Robert P. Saltman

IPC: B29C4788

CPC classification number: A61L27/16 ,  A61L29/041 ,  C08L23/06 ,  C08L2207/068 ,  Y10T156/1038 ,  Y10T428/139

Abstract: Medical devices such as catheter balloons, stent covers and vascular grafts formed of ultrahigh molecular weight polyethylene. The devices are formed from polyethylene that has been processed so that it is microporous and has an oriented node and fibril structure. The balloons expand compliantly at low strains and are substantially less compliant at higher strains. The invention also comprises methods for making such balloons, including the steps of compacting a polyethylene powder and deforming it to impart the oriented structure.

Abstract translation: 诸如导管球囊，支架盖和由超高分子量聚乙烯形成的血管移植物的医疗装置。 这些装置由聚乙烯形成，其已经被处理以使其是微孔的并且具有定向的节点和原纤维结构。 气球在低应变下柔顺扩张，并且在较高应变下基本上较不顺应。 本发明还包括制造这种气球的方法，包括压制聚乙烯粉末并变形以赋予定向结构的步骤。

公开(公告)号：US06447521B1

公开(公告)日：2002-09-10

申请号：US09662551

申请日：2000-09-15

Applicant: Steven L. Mouw ,  Murthy V. Simhambhatla ,  Chicheng Wang

Inventor： Steven L. Mouw ,  Murthy V. Simhambhatla ,  Chicheng Wang

IPC: A61F1100

CPC classification number: A61F2/958 ,  A61F2002/9583

Abstract: A catheter system for removably securing a stent which generally includes an inner tubular member and an outer tubular member with an expandable member disposed about the inner tubular member. A foamed cover is disposed between the expandable member and the inner tubular member. An expandable stent is crimped onto the expandable member and is retained in place by compressing the foamed cover. Used with a stent delivery system, the catheter system is inserted into a body lumen such as an artery. The stent is secured in place while advancing the system through tortuous body lumen passages. The stent is advanced to the desired location in the body lumen and implanted by inflating the expandable member and thereby expanding the stent into the body lumen. The stent is released from the system by deflating the expandable member and withdrawing the catheter system from the body.

Abstract translation: 一种用于可拆卸地固定支架的导管系统，其通常包括内部管状构件和具有围绕内部管状构件设置的可扩张构件的外部管状构件。 泡沫盖布置在可膨胀构件和内管状构件之间。 可扩张支架被卷曲到可膨胀构件上并通过压缩发泡盖保持在适当的位置。 与支架输送系统一起使用时，将导管系统插入诸如动脉的体腔内。 支架固定在适当的位置，同时使系统通过曲折的体腔通道。 支架前进到体腔内的所需位置，并且通过使可膨胀构件膨胀并从而将支架扩张到体腔中而植入。 支架通过使可膨胀构件放气并将导管系统从身体上取出而从系统释放。

公开(公告)号：US06428506B1

公开(公告)日：2002-08-06

申请号：US09470056

申请日：1999-12-22

Applicant: Murthy V. Simhambhatla ,  Robert D. Ainsworth ,  Robert P. Saltman

Inventor： Murthy V. Simhambhatla ,  Robert D. Ainsworth ,  Robert P. Saltman

IPC: A61M2900

CPC classification number: A61L27/16 ,  A61L29/041 ,  C08L23/06 ,  C08L2207/068 ,  Y10T156/1038 ,  Y10T428/139

Abstract: Medical devices such as catheter balloons, stent covers and vascular grafts formed of ultrahigh molecular weight polyethylene. The devices are formed from polyethylene that has been processed so that it is microporous and has an oriented node and fibril structure. The balloons expand compliantly at low strains and are substantially less compliant at higher strains. The invention also comprises methods for making such balloons, including the steps of compacting a polyethylene powder and deforming it to impart the oriented structure.

公开(公告)号：US06270522B1

公开(公告)日：2001-08-07

申请号：US09469728

申请日：1999-12-21

Applicant: Murthy V. Simhambhatla ,  Venu Ghanta ,  Timoteo Tomas

Inventor： Murthy V. Simhambhatla ,  Venu Ghanta ,  Timoteo Tomas

IPC: A61F206

CPC classification number: B29C49/18 ,  A61L29/06 ,  A61L29/14 ,  A61M25/1029 ,  B29C49/6481 ,  B29C2049/0089 ,  B29K2105/258 ,  B29L2022/022 ,  B29L2031/7542 ,  C08L67/02

Abstract: A balloon formed of a single layer of polybutylene terephthalate and polytetramethylene ether glycol terephthalate copolymer in a substantially unblended form. The copolymer has a flexural modulus of greater than about 150,000 psi. The presently preferred copolymer is Hytrel® 8238 by DuPont. The balloon would be substantially unblended, defined as greater than about 60% by weight to about 100% by weight of the copolymer. The balloon is formed in a series of molds. The balloon exhibits high rupture pressure and low compliance coupled with good lesion cross and recross ability.

Abstract translation: 由单层聚对苯二甲酸丁二醇酯和聚四亚甲基醚二醇对苯二甲酸乙二醇酯共聚物形成的气囊，基本上是非混合形式。 共聚物的挠曲模量大于约150,000psi。 目前优选的共聚物是DuPont的Hytrel 8238。 气囊将基本上未共混，定义为大于约60重量％至约100重量％的共聚物。 气球形成一系列模具。 气球表现出高的破裂压力和低顺应性，并具有良好的病变交叉和交叉能力。