Patents by Inventor Hung L. Lam
Hung L. Lam 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).
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Patent number: 10342661Abstract: A prosthetic mitral valve with a compressible and expandable base structure that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the base structure comprise a primary member and a secondary member surrounding the primary member and coupled thereto. Three flexible leaflets are attached to commissure sections of the primary member in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: GrantFiled: October 1, 2018Date of Patent: July 9, 2019Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Publication number: 20190029828Abstract: A prosthetic mitral valve with a compressible and expandable base structure that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the base structure comprise a primary member and a secondary member surrounding the primary member and coupled thereto. Three flexible leaflets are attached to commissure sections of the primary member in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: ApplicationFiled: October 1, 2018Publication date: January 31, 2019Inventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Patent number: 10085836Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure regions disposed towards an outflow end and three curved cusp regions between adjacent commissure regions. Three flexible leaflets are attached to the commissure regions in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: GrantFiled: August 10, 2017Date of Patent: October 2, 2018Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Publication number: 20170333188Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure regions disposed towards an outflow end and three curved cusp regions between adjacent commissure regions. Three flexible leaflets are attached to the commissure regions in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: ApplicationFiled: August 10, 2017Publication date: November 23, 2017Inventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Patent number: 9730794Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure posts disposed towards an outflow end and three curved cusp regions between adjacent commissure posts. Three flexible leaflets are attached to the commissure posts in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: GrantFiled: October 12, 2015Date of Patent: August 15, 2017Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Publication number: 20160158013Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure posts disposed towards an outflow end and three curved cusp regions between adjacent commissure posts. Three flexible leaflets are attached to the commissure posts in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: ApplicationFiled: October 12, 2015Publication date: June 9, 2016Inventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Patent number: 9155617Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure posts disposed towards an outflow end and three curved cusp regions between adjacent commissure posts. Three flexible leaflets are attached to the commissure posts in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: GrantFiled: April 18, 2014Date of Patent: October 13, 2015Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Publication number: 20140222141Abstract: A prosthetic mitral valve with a compressible and expandable stent that, when expanded, is circumferentially oval, elliptical, or D-shaped, with a major axis and a minor axis ratio of from about 3:4 to about 4:5. Embodiments of the stent comprise three commissure posts disposed towards an outflow end and three curved cusp regions between adjacent commissure posts. Three flexible leaflets are attached to the commissure posts in a tri-foil configuration. Embodiments of the prosthetic mitral valve include an atrial ring disposed at the inflow end of the stent.Type: ApplicationFiled: April 18, 2014Publication date: August 7, 2014Applicant: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Patent number: 8721716Abstract: An anatomically approximate prosthetic heart valve includes dissimilar flexible leaflets, dissimilar commissures and/or a non-circular flow orifice. The heart valve may be implanted in the mitral position and have one larger leaflet oriented along the anterior aspect so as to mimic the natural anterior leaflet. Two other smaller leaflets extend around the posterior aspect of the valve. A basic structure providing peripheral support for the leaflets includes two taller commissures on both sides of the larger leaflet, with a third, smaller commissure between the other two leaflets. The larger leaflet may be thicker and/or stronger than the other two leaflets. The base structure defines a flow orifice intended to simulate the shape of the mitral annulus during the systolic phase.Type: GrantFiled: September 9, 2011Date of Patent: May 13, 2014Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues Lafrance
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Publication number: 20120123530Abstract: An anatomically approximate prosthetic heart valve includes dissimilar flexible leaflets, dissimilar commissures and/or a non-circular flow orifice. The heart valve may be implanted in the mitral position and have one larger leaflet oriented along the anterior aspect so as to mimic the natural anterior leaflet. Two other smaller leaflets extend around the posterior aspect of the valve. A basic structure providing peripheral support for the leaflets includes two taller commissures on both sides of the larger leaflet, with a third, smaller commissure between the other two leaflets. The larger leaflet may be thicker and/or stronger than the other two leaflets. The base structure defines a flow orifice intended to simulate the shape of the mitral annulus during the systolic phase.Type: ApplicationFiled: September 9, 2011Publication date: May 17, 2012Applicant: EDWARDS LIFESCIENCES CORPORATIONInventors: Alain F. Carpentier, Hung L. Lam, Hugues La France
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Patent number: 8034104Abstract: An anatomically approximate prosthetic heart valve includes dissimilar flexible leaflets, dissimilar commissures and/or a non-circular flow orifice. The heart valve may be implanted in the mitral position and have one larger leaflet oriented along the anterior aspect so as to mimic the natural anterior leaflet. Two other smaller leaflets extend around the posterior aspect of the valve. A basic structure providing peripheral support for the leaflets includes two taller commissures on both sides of the larger leaflet, with a third, smaller commissure between the other two leaflets. The larger leaflet may be thicker and/or stronger than the other two leaflets. The base structure defines a flow orifice intended to simulate the shape of the mitral annulus during the systolic phase. For example, the flow orifice may be elliptical.Type: GrantFiled: September 23, 2010Date of Patent: October 11, 2011Assignee: Edwards Lifesciences CorporationInventors: Alain Carpentier, Hung L. Lam
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Publication number: 20110015731Abstract: An anatomically approximate prosthetic heart valve includes dissimilar flexible leaflets, dissimilar commissures and/or a non-circular flow orifice. The heart valve may be implanted in the mitral position and have one larger leaflet oriented along the anterior aspect so as to mimic the natural anterior leaflet. Two other smaller leaflets extend around the posterior aspect of the valve. A basic structure providing peripheral support for the leaflets includes two taller commissures on both sides of the larger leaflet, with a third, smaller commissure between the other two leaflets. The larger leaflet may be thicker and/or stronger than the other two leaflets. The base structure defines a flow orifice intended to simulate the shape of the mitral annulus during the systolic phase. For example, the flow orifice may be elliptical.Type: ApplicationFiled: September 23, 2010Publication date: January 20, 2011Applicant: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam
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Patent number: 7871435Abstract: An anatomically approximate prosthetic heart valve includes dissimilar flexible leaflets, dissimilar commissures and/or a non-circular flow orifice. The heart valve may be implanted in the mitral position and have one larger leaflet oriented along the anterior aspect so as to mimic the natural anterior leaflet. Two other smaller leaflets extend around the posterior aspect of the valve. A basic structure providing peripheral support for the leaflets includes two taller commissures on both sides of the larger leaflet, with a third, smaller commissure between the other two leaflets. The larger leaflet may be thicker and/or stronger than the other two leaflets. The base structure defines a flow orifice intended to simulate the shape of the mitral annulus during the systolic phase. For example, the flow orifice may be elliptical.Type: GrantFiled: January 19, 2005Date of Patent: January 18, 2011Assignee: Edwards Lifesciences CorporationInventors: Alain F. Carpentier, Hung L. Lam, Hugues La France
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Patent number: 5104407Abstract: An annuloplasty ring prosthesis which is formed from a selectively flexible body element having at least one defined length about its circumference which is substantially rigid. The remainder of the body element gradually increases in flexibility. The body element is a substantially annular shaped body element which is designed to be sutured to the annulus of a heart valve. The body element is formed from a non-corrosive, anti-magnetic material, and is wrapped in a material through which sutures can be drawn to suture the prosthesis to the heart valve annulus.Type: GrantFiled: September 20, 1990Date of Patent: April 14, 1992Assignee: Baxter International Inc.Inventors: Hung L. Lam, Than Nguyen, Alain Carpentier
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Patent number: 5035709Abstract: A mechanical heart valve having one or more leaflets pivotally fitted in a substantially cylindrical shaped valve body formed from a resiliently deformable material. A stiffening member formed from substantially nonresilient material fit about the valve body exterior wall to provide structural integrity to the valve body. Stresses which are normally applied to the heart valve body during the opening and closing of the valve are absorbed or cushioned by the incorporation of a rubber-like body between the stiffening member and the retainer member. Further cushioning is provided by incorporating another rubber-like body in the sewing ring. This second body extends out from the exterior surface of the valve body. Finally, a length of fabric is positioned about the retainer and shock absorbing bodies. This design provides a precisely calibrated rotational torque which allows for optimum orientation of the leaflets by the implanting surgeon.Type: GrantFiled: March 29, 1990Date of Patent: July 30, 1991Assignee: Baxter International Inc.Inventors: David W. Wieting, Than Nguyen, Robert Stobie, Hung L. Lam, Ralph Kafesjian
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Patent number: 4917698Abstract: A ring prosthesis which provides different flexibilities at various points about the circumference of an associated heart valve. Specifically, the annuloplasty ring prosthesis of the invention includes a segmented body formed by two or more segments. The individual segments form a body which is substantially circular and shaped proportional to fit about the annulus of the associated heart valve. The individual segments are held in position with respect to each by a flexible joint. This flexible joint is formed by covering the segments with a flexible material which fits snugly about the segments. The cover is tied off between the adjacent segments to further restrain movement of the segments with respect to each other.Type: GrantFiled: December 22, 1988Date of Patent: April 17, 1990Assignee: Baxter International Inc.Inventors: Alain Carpentier, Hung L. Lam, Than Nguyen
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Patent number: 4725274Abstract: A prosthetic heart valve comprising a frame which includes outer and inner bands and a plurality of wire-like members interlocked with the bands and forming the tip portions of commissure supports. The bands are covered with outer and inner jackets, and valve leaflets are attached to the frame and extend over a distal edge of the bands. The ends of the jackets form flexible, resilient fingers which extend between the distal edge and the valve leaflets to shield the valve leaflets from the distal edge.Type: GrantFiled: October 24, 1986Date of Patent: February 16, 1988Assignee: Baxter Travenol Laboratories, Inc.Inventors: Ernest Lane, Hung L. Lam