Patents by Inventor Jianlu Ma

Jianlu Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160038153
    Abstract: An intraluminal device may be used at a bifurcation to anchor in an afferent vessel, allow perfusion to efferent vessels, and act as scaffolding to inhibit herniation of objects out of a neck of a bifurcation aneurysm. An intraluminal device may include a first side; a second side opposite the first side across a longitudinal axis of the intraluminal device; a proximal section configured to anchor in an afferent vessel; a distal section comprising a first wing and a second wing wherein, in an expanded state, the first wing extends from the first side to the second side and the second wing extends from the second side, through an opening of the first wing, and to the first side.
    Type: Application
    Filed: October 21, 2015
    Publication date: February 11, 2016
    Inventors: Michael Losordo, Jianlu Ma
  • Patent number: 9192388
    Abstract: A vascular remodeling device and methods for its use are provided. The device can be positionable at a junction of a bifurcation having an aneurysm and that defines afferent and efferent vessels. Ends of the device can be at least partially inserted into the aneurysm or can anchor the device by being at least partially inserted into efferent vessels. The device can act as a scaffolding to inhibit dislodging of objects out of the aneurysm. The device can permit perfusion to the efferent vessels. Embolic material can be inserted in the aneurysm before, during, and/or after positioning the device.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: November 24, 2015
    Assignee: Covidien LP
    Inventors: Anh Cam, Michael Louis Losordo, Jianlu Ma, Victoria Schuman, Xiaoling Zhao
  • Patent number: 9186267
    Abstract: An intraluminal device may be used at a bifurcation to anchor in an afferent vessel, allow perfusion to efferent vessels, and act as scaffolding to inhibit herniation of objects out of a neck of a bifurcation aneurysm. An intraluminal device may include a first side; a second side opposite the first side across a longitudinal axis of the intraluminal device; a proximal section configured to anchor in an afferent vessel; a distal section comprising a first wing and a second wing wherein, in an expanded state, the first wing extends from the first side to the second side and the second wing extends from the second side, through an opening of the first wing, and to the first side.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: November 17, 2015
    Assignee: Covidien LP
    Inventors: Michael Louis Losordo, Jianlu Ma
  • Publication number: 20150290005
    Abstract: A medical device is provided. The medical device includes a vessel-engaging member attached to a distal end of a delivery wire via a connection mechanism. The vessel-engaging member includes a plurality of rows and a plurality of bridges positioned between each adjacent row, each of the bridges connecting a vertex of a first row with a corresponding vertex of a second row. The vessel-engaging member further includes first and second tapered sections coupled to the connection mechanism, each of the tapered sections projecting from a proximal row and tapering in a direction from the proximal row toward the connection mechanism, each of the tapered sections having a length measured along a longitudinal axis, wherein the length of the first tapered section is less than the length of the second tapered section.
    Type: Application
    Filed: April 23, 2015
    Publication date: October 15, 2015
    Inventors: John Wainwright, Jianlu Ma, Michael Losordo
  • Patent number: 9155647
    Abstract: A stent delivery device includes a first retaining polymer disposed about and retaining a self-expanding stent at a proximal end portion, a second retaining polymer disposed about and retaining the self-expanding stent at a distal end portion, a first resistance member in thermal communication with the first retaining polymer, and a second resistance member in thermal communication with the second retaining polymer. The second retaining polymer and second resistance member are configured to allow release and expansion of the distal end portion of the self-expanding stent without expansion of the proximal end portion of the self-expanding stent.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: October 13, 2015
    Assignee: Covidien LP
    Inventors: Jessica Liang, Jianlu Ma
  • Publication number: 20150265443
    Abstract: An implant delivery system has one or more interlock assemblies which connect the implant delivery catheter to the implant, an improved inner tubular member and an outer tubular member. The interlock assemblies, improved inner tubular member and outer tubular member cooperate to place the implant in tension during deployment, thereby reducing implant deployment force.
    Type: Application
    Filed: June 1, 2015
    Publication date: September 24, 2015
    Inventors: Lixiao Wang, Jianlu Ma, Joe Tatalovich, Peggy Waltz, Keith Smythe, Richard Kusleika
  • Publication number: 20150230952
    Abstract: The invention provides for intra-luminal stents, especially stent having controlled fracture connection, as well as, methods of making and using the same. In one embodiment, a stent for implantation into a vessel has a plurality of annular segments collectively forming tubular shape, characterized by at least first and second adjacent annular segments each defined by a plurality of struts and at least one joint interconnecting respective struts of the first and second segments on a non-permanent basis.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 20, 2015
    Inventors: Jianlu Ma, Ott Khouengboua, Alex Grafov
  • Publication number: 20150209133
    Abstract: Described herein are flexible implantable devices or stents that can conform to the shape of vessels of the neurovasculature. In some embodiments, the devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. In some embodiments, a vascular remodeling device includes a first section and a protruding section. During deployment, the device expands from a compressed configuration to an expanded configuration. The first section anchors the device in an afferent vessel and/or in an efferent vessel of a bifurcation and the protruding section is positioned in the junction of the bifurcation having an aneurysm and across the neck of the aneurysm or at least partially within the aneurysm.
    Type: Application
    Filed: February 2, 2015
    Publication date: July 30, 2015
    Inventors: Anh CAM, Michael LOSORDO, Jianlu MA, Xiaoling ZHAO
  • Publication number: 20150196390
    Abstract: A mitral valve replacement device is adapted to be deployed at a mitral valve position in a human heart. The device has an atrial flange defining an atrial end of the device, a valve body defining a ventricular end of the device, and an annulus support that connects the atrial flange and the valve body, the annulus support including a ring of tabs extending radially therefrom and adapted to engage the native mitral annulus and/or the native leaflet(s) of the human heart.
    Type: Application
    Filed: May 16, 2014
    Publication date: July 16, 2015
    Inventors: Jianlu Ma, Yong Huo
  • Publication number: 20150164665
    Abstract: Vascular remodeling devices can include a proximal section, an intermediate section, and a distal section. During deployment, the proximal section can expand from a compressed delivery state to an expanded state and anchor the device in an afferent vessel of a bifurcation. The distal section expands from the compressed delivery state to an expanded state that may be substantially planar, approximately semi-spherical, umbrella shaped, or reverse umbrella shaped. The distal section is positioned in a bifurcation junction across the neck of an aneurysm or within an aneurysm. The intermediate section allows perfusion to efferent vessels. Before or after the device is in position, embolic material may be used to treat the aneurysm. The distal section can act as a scaffolding to prevent herniation of the embolic material. The device can be used for clot retrieval with integral distal embolic protection.
    Type: Application
    Filed: December 22, 2014
    Publication date: June 18, 2015
    Inventors: Anh CAM, Michael LOSORDO, Jianlu MA, Luong NGUYEN, Sanjay SHRIVASTAVA, John WAINWRIGHT, Xiaoling ZHAO
  • Publication number: 20150150672
    Abstract: The present invention provides devices for removing an embolus or thrombus. The device includes an elongate member configured for insertion into the vasculature, an expandable member that extends from the distal end of the elongate member, and a flow restrictor associated with a proximal portion of the expandable member. The expandable member is configured to transition from a compacted state to an expanded state, in which the expandable portion engages with the embolus. The flow restrictor is configured to restrict blood flow and generate a low pressure zone at a location in the vasculature that is distal to the flow restrictor.
    Type: Application
    Filed: January 16, 2015
    Publication date: June 4, 2015
    Inventor: Jianlu Ma
  • Patent number: 9044351
    Abstract: An implant delivery system has one or more interlock assemblies which connect the implant delivery catheter to the implant, an improved inner tubular member and an outer tubular member. The interlock assemblies, improved inner tubular member and outer tubular member cooperate to place the implant in tension during deployment, thereby reducing implant deployment force.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: June 2, 2015
    Assignee: Covidien LP
    Inventors: Lixiao Wang, Jianlu Ma, Joe Tatalovich, Peggy Waltz, Keith Smythe, Rich Kusleika
  • Patent number: 9028540
    Abstract: A medical device is provided. The medical device includes a vessel-engaging member attached to a distal end of a delivery wire via a connection mechanism. The vessel-engaging member includes a plurality of rows and a plurality of bridges positioned between each adjacent row, each of the bridges connecting a vertex of a first row with a corresponding vertex of a second row. The vessel-engaging member further includes first and second tapered sections coupled to the connection mechanism, each of the tapered sections projecting from a proximal row and tapering in a direction from the proximal row toward the connection mechanism, each of the tapered sections having a length measured along a longitudinal axis, wherein the length of the first tapered section is less than the length of the second tapered section.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 12, 2015
    Assignee: Covidien LP
    Inventors: John Wainwright, Jianlu Ma, Michael Louis Losordo
  • Publication number: 20150066073
    Abstract: The present invention relates to detachment mechanisms for delivering and releasing implantable devices into a body lumen. According to certain aspects, systems of the invention include a junction that couples an implantable device to a delivery member. The junction includes an anodic portion and a cathodic portion galvanically coupled to the anodic portion such that the anodic portion corrodes when exposed to an electrolytic fluid, thereby detaching the implantable device from the delivery member without application of energy from an external power source.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 5, 2015
    Inventor: Jianlu Ma
  • Patent number: 8961585
    Abstract: The invention provides for intra-luminal stents, especially stent having controlled fracture connection, as well as, methods of making and using the same. In one embodiment, a stent for implantation into a vessel has a plurality of annular segments collectively forming tubular shape, characterized by at least first and second adjacent annular segments each defined by a plurality of struts and at least one joint interconnecting respective struts of the first and second segments on a non-permanent basis.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: February 24, 2015
    Assignee: Covidien LP
    Inventors: Jianlu Ma, Ott Khouengboua, Alex Grafov
  • Patent number: 8956399
    Abstract: Described herein are flexible implantable devices or stents that can conform to the shape of vessels of the neurovasculature. In some embodiments, the devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. In some embodiments, a vascular remodeling device includes a first section and a protruding section. During deployment, the device expands from a compressed configuration to an expanded configuration. The first section anchors the device in an afferent vessel and/or in an efferent vessel of a bifurcation and the protruding section is positioned in the junction of the bifurcation having an aneurysm and across the neck of the aneurysm or at least partially within the aneurysm.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: February 17, 2015
    Assignee: Covidien LP
    Inventors: Anh Cam, Michael Louis Losordo, Jianlu Ma, Xiaoling Zhao
  • Patent number: 8915950
    Abstract: Described herein are vascular remodeling devices that include a proximal section, an intermediate section, and a distal section. During deployment, the proximal section can expand from a compressed delivery state to an expanded state and anchors the device in an afferent vessel of a bifurcation. The distal section expands from the compressed delivery state to an expanded state that may be substantially planar, approximately semi-spherical, umbrella shaped, or reverse umbrella shaped. The distal section is positioned in a bifurcation junction across the neck of an aneurysm or within an aneurysm. The intermediate section allows perfusion to efferent vessels. Before or after the device is in position, embolic material may be used to treat the aneurysm. The distal section can act as a scaffolding to prevent herniation of the embolic material. The device can be used for clot retrieval with integral distal embolic protection.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: December 23, 2014
    Assignee: Covidien LP
    Inventors: Anh Cam, Michael Louis Losordo, Jianlu Ma, Luong Nguyen, Sanjay Shrivastava, John Wainwright, Xiaoling Zhao
  • Publication number: 20140243882
    Abstract: A mechanical thrombectomy device system is disclosed that is made from a single piece of biocompatible material, including a proximal flow block portion/feature, and/or, a flow block feature in the device body portion, a guidewire like delivery portion and an expandable, treatment portion. The construction of the device from a single piece allows for a seamless transition from the delivery portion to the treatment portion, thus removing any joints or bonding of the two portions together as separate pieces. This improves the strength of the system as a whole and greatly reduces the possibility of the two parts unintentionally detaching from each other.
    Type: Application
    Filed: November 15, 2013
    Publication date: August 28, 2014
    Inventor: Jianlu Ma
  • Patent number: 8814929
    Abstract: An implant including a first tubular medical device and a second tubular medical device coaxially disposed within the first tubular medical device. Each of the first and second tubular medical devices including a tubular body having a plurality of slits extending through a sidewall to form a plurality of first and second sidewall segments respectively. The radial expansion of the first tubular medical device forms an alternating pattern of flared first side wall segments and slits disposed adjacent to a body vessel wall. The radial expansion of the second tubular medical device forms an alternating pattern of flared second sidewall segments and slits. The second tubular medical device is rotationally aligned with the first tubular medical device such that the flared second sidewall segments at least partially cover the slits disposed adjacent the body vessel wall of the first tubular medical device.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: August 26, 2014
    Assignee: Covidien LP
    Inventors: Jianlu Ma, Joe Tatalovich
  • Publication number: 20140180382
    Abstract: According to one aspect of the present invention, a fatigue resistant stent comprises a flexible tubular structure having an inside diameter, an outside diameter, and a sidewall therebetween and having apertures extending through the sidewall. According to other aspects of the invention, processes for making a fatigue resistant stent are disclosed. According to further aspects of the invention, delivery systems for a fatigue resistant stent and methods of use are provided.
    Type: Application
    Filed: October 11, 2013
    Publication date: June 26, 2014
    Applicant: Covidien LP
    Inventors: Jianlu Ma, Joe Tatalovich, Lixiao Wang, Xiaoling Zhao, Dan Ranum