Patents by Inventor Mark Chau
Mark Chau 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: 10555810Abstract: A quick-connect heart valve prosthesis that can be quickly and easily implanted is provided. The heart valve includes a substantially non-expandable, non-compressible prosthetic valve and a plastically-expandable coupling stent, thereby enabling attachment to the annulus without sutures. A small number of guide sutures may be provided for aortic valve orientation. The prosthetic valve may be a commercially available valve with a sewing ring with the coupling stent attached thereto. The coupling stent may expand from a conical deployment shape to a conical expanded shape, and may include web-like struts connected between axially-extending posts. A system and method for deployment includes a hollow two-piece handle through which a balloon catheter passes. A valve holder is stored with the heart valve and the handle easily attaches thereto to improve valve preparation steps.Type: GrantFiled: February 26, 2018Date of Patent: February 11, 2020Assignee: Edwards Lifesciences CorporationInventors: Rafael Pintor, Mark Chau, Travis Zenyo Oba, August R. Yambao, Louis A. Campbell, Tammy Huntley, Qinggang Zeng, Carey L. Cristea, Faisal Kalam
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Patent number: 10517726Abstract: In one representative embodiment, an implantable prosthetic device comprises a spacer body portion configured to be disposed between native leaflets of a heart, and an anchor portion configured to secure the native leaflets against the spacer body portion, wherein the prosthetic device is movable between a compressed configuration, in which the spacer body portion is radially compressed and is axially spaced relative to the anchor portion, and an expanded configuration, in which the spacer body portion expands radially outwardly relative to the compressed configuration and overlaps at least a portion of the anchor portion.Type: GrantFiled: May 13, 2016Date of Patent: December 31, 2019Assignee: Edwards Lifesciences CorporationInventors: Mark Chau, David M. Taylor, Alexander J. Siegel, Christopher J. Olson, Sergio Delgado, Alexander H. Cooper, Lauren R. Freschauf, Asher L. Metchik, Matthew T. Winston, Cristobal R. Hernandez, Emil Karapetian, Bao Khuu, Eric Dixon
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Patent number: 10507102Abstract: A prosthetic apparatus for implantation in a native mitral valve includes a main body for placement within the native mitral annulus. The main body is compressible to a radially compressed state for delivery into the heart and is self-expandable from the compressed state to a radially expanded state for implantation. A valve structure is mounted within a lumen of the main body and preferably forms three leaflets made of pericardium. An atrial sealing member is disposed along an atrial portion of the main body and ventricular anchors are coupled to a ventricular portion of the main body. The atrial sealing member impedes the flow of blood between the main body and the native annulus. The ventricular anchors are positioned outside the main body for capturing native mitral valve leaflets between the main body and the ventricular anchors.Type: GrantFiled: April 5, 2018Date of Patent: December 17, 2019Assignee: Edwards Lifesciences CorporationInventors: Mark Chau, Marlowe E. Patterson, Seung-Beom Yi, Stephen C. Geist, Travis Zenyo Oba
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Publication number: 20190343623Abstract: In one representative embodiment, an implantable prosthetic device comprises a spacer body portion configured to be disposed between native leaflets of a heart, and an anchor portion configured to secure the native leaflets against the spacer body portion. The prosthetic device can be movable between multiple configurations. The spacer body can be made from braided, self-expandable metallic thread. A delivery apparatus can have a first shaft and a second shaft, wherein movement of the first shaft relative to the second shaft moves the anchor portion relative to the spacer body.Type: ApplicationFiled: July 25, 2019Publication date: November 14, 2019Inventors: Mark Chau, David M. Taylor, Alexander J. Siegel, Christopher J. Olson, Sergio Delgado, Alexander H. Cooper, Lauren R. Freschauf, Asher L. Metchik, Matthew T. Winston, Cristobal R. Hernandez, Emil Karapetian, Bao Khuu, Eric Robert Dixon
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Publication number: 20190343624Abstract: In one representative embodiment, an implantable prosthetic device comprises a spacer body portion configured to be disposed between native leaflets of a heart, and an anchor portion configured to secure the native leaflets against the spacer body portion. The prosthetic device can be movable between multiple configurations. The spacer body can be configured to extend radially outwardly as the spacer body extends away from the distal end toward the proximal end. A delivery apparatus can have a first shaft and a second shaft, wherein movement of the first shaft relative to the second shaft moves the anchor portion relative to the spacer body.Type: ApplicationFiled: July 25, 2019Publication date: November 14, 2019Applicant: Edwards Lifesciences CorporationInventors: Mark Chau, David M. Taylor, Alexander J. Siegel, Christopher J. Olson, Sergio Delgado, Alexander H. Cooper, Lauren R. Freschauf, Asher L. Metchik, Matthew T. Winston, Cristobal R. Hernandez, Emil Karapetian, Bao Khuu, Eric Robert Dixon
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Patent number: 10463481Abstract: A prosthetic heart valve includes a collapsible and expandable frame having a main body, an atrial portion, and at least one ventricular anchor. The atrial portion extends radially outwardly relative to the main body and the ventricular anchor extends from a ventricular end of the main body. The main body and the atrial portion are preferably separate metal components that are coupled together via sutures or a fabric member. The prosthetic heart valve also includes a valve structure that is supported in the main body of the frame. The valve structure has a plurality of leaflets for regulating the flow of blood in one direction.Type: GrantFiled: September 8, 2016Date of Patent: November 5, 2019Assignee: Edwards Lifesciences CorporationInventors: Stephen C. Geist, Robert C. Taft, Travis Zenyo Oba, Sam Sok, Matthew A. Peterson, Kevin M. Golemo, Mark Chau, Seung-Beom Yi
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Publication number: 20190167420Abstract: Methods for replacing a native heart valve. An anchor comprises coils adapted to support a heart valve prosthesis. The anchor is positioned at a native heart valve. An expansible heart valve prosthesis is delivered into the anchor and expanded inside the coils. This moves at least one coil from a first diameter to a second, larger diameter while securing the anchor and the heart valve prosthesis relative to each other. The heart valve prosthesis comprises a seal on the expansible heart valve prosthesis. Additional apparatus and methods are disclosed.Type: ApplicationFiled: February 5, 2019Publication date: June 6, 2019Inventors: Paul A. Spence, Landon H. Tompkins, Mark Chau, Alexander J. Siegel
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Publication number: 20190167418Abstract: Systems and methods for replacing a native heart valve. An anchor comprises multiple coils adapted to support a heart valve prosthesis. At least one of the coils is normally at a first diameter, and is expandable to a second, larger diameter upon application of radial outward force from within the anchor. An expansible heart valve prosthesis is provided and is configured to be delivered into the anchor and expanded inside the multiple coils. This moves at least one coil from the first diameter to the second diameter while securing the anchor and the heart valve prosthesis relative to each other. The system further includes a seal on the anchor that can prevent at least some blood leakage after implantation of the heart valve prosthesis in the helical anchor. Additional apparatus and methods are disclosed.Type: ApplicationFiled: February 5, 2019Publication date: June 6, 2019Inventors: Paul A. Spence, Landon H. Tompkins, Mark Chau, Alexander J. Siegel
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Publication number: 20190167421Abstract: Embodiments of prosthetic valves for implantation within a native mitral valve are provided. A preferred embodiment of a prosthetic valve includes a radially compressible main body and a one-way valve portion. The prosthetic valve further comprises at least one ventricular anchor coupled to the main body and disposed outside of the main body. A space is provided between an outer surface of the main body and the ventricular anchor for receiving a native mitral valve leaflet. The prosthetic valve preferably includes an atrial sealing member adapted for placement above the annulus of the mitral valve. Methods and devices for delivering and implanting the prosthetic valve are also described.Type: ApplicationFiled: February 6, 2019Publication date: June 6, 2019Inventors: Mark Chau, Marlowe Patterson, Seung Yi, Travis Oba, Steve Geist, Lucian Lozonschi, Georg Lutter
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Publication number: 20190151084Abstract: A heart valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve has a base stent that is deployed at a treatment site, and a valve component configured to quickly connect to the base stent. The base stent may take the form of a self- or balloon-expandable stent that expands outward against the native valve with or without leaflet excision. The valve component has a non-expandable prosthetic valve and a self- or balloon-expandable coupling stent for attachment to the base stent, thereby fixing the position of the valve component relative to the base stent. The prosthetic valve may be a commercially available to valve with a sewing ring and the coupling stent attaches to the sewing ring. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment. A catheter-based system and method for deployment is provided.Type: ApplicationFiled: January 15, 2019Publication date: May 23, 2019Applicant: Edwards Lifesciences CorporationInventors: Rafael Pintor, Mark Chau, Travis Zenyo Oba, August R. Yambao, Louis A. Campbell, Tammy Huntley, Quinggang Zeng, Carey L. Cristea, Faisal Kalam
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Publication number: 20190133761Abstract: A deficient native mitral valve is treated by implanting a prosthetic mitral valve assembly valve in a patient's heart. The prosthetic mitral valve assembly includes a stent having a flared upper portion, an intermediate portion, and a lower portion. The diameter at the inflow end of the stent is larger than at the outflow end. The prosthetic mitral valve assembly also includes a valve portion formed with pericardial tissue leaflets. A tether has a first end attached to the stent and a second end attached to an anchor. The tether extends through a wall of the left ventricle and the tissue anchor is placed outside the left ventricle. After implantation, the flared upper portion resists movement in the downstream direction and the tether resists movement in the upstream direction for securing the prosthetic mitral valve assembly in the native mitral valve.Type: ApplicationFiled: January 2, 2019Publication date: May 9, 2019Inventors: Stanton J. Rowe, Mark Chau, Son V. Nguyen
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Patent number: 10226330Abstract: Systems and methods for replacing a heart valve. An expansible helical anchor is formed as multiple coils to support a valve prosthesis. At least one of the coils is expandable to a second, larger diameter upon application force from within the anchor. A gap is defined between adjacent coils sufficient to prevent engagement by at least one of the adjacent coils with the native heart valve. An expansible heart valve prosthesis is provided and is configured to be delivered into the anchor and expanded inside the coils into engagement. This moves the coil from the first diameter to the second diameter while securing the anchor and prosthesis together. The system further includes a seal on the expansible heart valve prosthesis configured to engage the helical anchor and prevent blood leakage past the heart valve prosthesis after implantation of the heart valve prosthesis in the helical anchor.Type: GrantFiled: August 14, 2014Date of Patent: March 12, 2019Assignee: Mitral Valve Technologies SarlInventors: Paul A. Spence, Landon H. Tompkins, Mark Chau, Alexander J. Siegel
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Patent number: 10226334Abstract: A method of implanting a prosthetic mitral valve assembly using a transapical procedure is disclosed. An incision is formed in the chest in the apex of the patient's heart. A delivery catheter containing the prosthetic mitral valve assembly is advanced over a guidewire into the patient's heart. The prosthetic mitral valve assembly is deployed from the delivery catheter into the native mitral valve. The prosthetic mitral valve assembly comprises a stent having a lower portion for placement between the leaflets of a native mitral valve and an upper portion having a flared end for placement above the annulus. The prosthetic mitral valve includes a valve portion having leaflets formed of pericardial tissue. A plurality of upwardly bent prongs are provided along an outer surface of the stent for preventing upward migration of the prosthetic mitral valve assembly after deployment.Type: GrantFiled: December 29, 2014Date of Patent: March 12, 2019Assignee: Edwards Lifesciences CorporationInventors: Stanton J. Rowe, Mark Chau, Son V. Nguyen
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Publication number: 20190060060Abstract: A prosthetic mitral valve can include an outer frame, an inner frame, a valve structure, and a sealing member. The outer frame comprises a plurality of first struts arranged in a lattice pattern and defining a first lumen. The outer frame is self-expandable from a compressed state to an expanded state. The inner frame comprises a plurality of second struts arranged in a lattice pattern and defining a second lumen. The inner frame is disposed within the first lumen of the outer frame, is self-expandable from a compressed state to an expanded state. The valve structure comprises three leaflets made from pericardium and is mounted within the second lumen of the inner frame. The sealing member is coupled to and extends radially outwardly from an atrial end of the outer frame and is configured to engage native tissue of the heart on an atrial side of the native mitral valve.Type: ApplicationFiled: October 25, 2018Publication date: February 28, 2019Applicant: Edwards Lifesciences CorporationInventors: Mark Chau, Marlowe E. Patterson, Seung-Beom Yi, Stephen C. Geist, Travis Zenyo Oba
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Publication number: 20190059876Abstract: Devices and methods for securing a tissue anchor in tissue of a patient, in particular to ensure proper deployment of a cardiac tissue anchor by regulating the force or pressure of a deployment tool against the tissue. One way to ensure proper deployment force is to visualize the distal end of the tissue anchoring catheter from outside the body using a display for an imaging sensor, where the distal end of the catheter changes configuration when it is pressed against the tissue. Another method involves automatically regulating the pressure applied to the tissue prior to deployment of the tissue anchor, which may also be used in conjunction with visualization. Several safety locks to prevent deployment of the tissue anchor prior to establishment of the proper pressure are disclosed, which again may be used with visualization and/or an automated pressure regulator.Type: ApplicationFiled: August 21, 2018Publication date: February 28, 2019Inventors: Steven Eric Decker, Matthew Michael Becerra, Nancy Hoang Khuu, Timothy Allen Dalton, Sue-Lynn Wu, Mark Chau, Omar Fawzi Azanki, Robert C. Taft, Emil Karapetian, Praveen De Silva, Hien T. Nguyen
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Patent number: 10182909Abstract: A heart valve prosthesis that can be quickly and easily implanted during a surgical procedure is provided. The prosthetic valve has a base stent that is deployed at a treatment site, and a valve component configured to quickly connect to the base stent. The base stent may take the form of a self- or balloon-expandable stent that expands outward against the native valve with or without leaflet excision. The valve component has a non-expandable prosthetic valve and a self- or balloon-expandable coupling stent for attachment to the base stent, thereby fixing the position of the valve component relative to the base stent. The prosthetic valve may be a commercially available to valve with a sewing ring and the coupling stent attaches to the sewing ring. The system is particularly suited for rapid deployment of heart valves in a conventional open-heart surgical environment. A catheter-based system and method for deployment is provided.Type: GrantFiled: February 2, 2017Date of Patent: January 22, 2019Assignee: Edwards Lifesciences CorporationInventors: Rafael Pintor, Mark Chau, Travis Zenyo Oba, August R. Yambao, Louis A. Campbell, Tammy Huntley, Qinggang Zeng, Carey L. Cristea, Faisal Kalam
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Patent number: 10111748Abstract: A prosthetic apparatus for implantation in a native mitral valve includes a main body for placement within the native mitral annulus. The main body is compressible to a radially compressed state for delivery into the heart and is self-expandable from the compressed state to a radially expanded state for implantation. A valve structure is mounted within a lumen of the main body and preferably forms three leaflets made of pericardium. An atrial sealing member is disposed along an atrial portion of the main body and ventricular anchors are coupled to a ventricular portion of the main body. The atrial sealing member impedes the flow of blood between the main body and the native annulus. The ventricular anchors are positioned outside the main body for capturing native mitral valve leaflets between the main body and the ventricular anchors.Type: GrantFiled: March 10, 2017Date of Patent: October 30, 2018Assignee: Edwards Lifesciences CorporationInventors: Mark Chau, Marlowe E. Patterson, Seung-Beom Yi, Stephen C. Geist, Travis Zenyo Oba
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Publication number: 20180271648Abstract: An exemplary two-stage prosthetic heart valve system has a radially expandable base stent implanted within a native valve annulus. The base stent desirably has three position markers projecting in the axial direction from the outflow end of the base stent to assist in aligning the stent with respect to the commissures of the native valve. The two-stage heart valve system also has a valve component that is delivered to and mounted within the base stent in a separate or sequential operation after the base stent has been anchored within the annulus. The valve component in certain embodiments comprises a hybrid valve component that includes a conventional, non-expandable surgical valve that is modified to include an expandable coupling stent that can be expanded to engage the inner surface of the base stent, thereby anchoring the valve component to the base stent.Type: ApplicationFiled: May 26, 2018Publication date: September 27, 2018Inventors: Mark Chau, Qinggang Zeng
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Publication number: 20180263767Abstract: A prosthetic apparatus for implantation in a native mitral valve includes a main body for placement within the native mitral annulus. The main body is compressible to a radially compressed state for delivery into the heart and is self-expandable from the compressed state to a radially expanded state for implantation. A valve structure is mounted within a lumen of the main body and preferably forms three leaflets made of pericardium. An atrial sealing member is disposed along an atrial portion of the main body and ventricular anchors are coupled to a ventricular portion of the main body. The atrial sealing member impedes the flow of blood between the main body and the native annulus. The ventricular anchors are positioned outside the main body for capturing native mitral valve leaflets between the main body and the ventricular anchors.Type: ApplicationFiled: April 5, 2018Publication date: September 20, 2018Inventors: Mark Chau, Marlowe E. Patterson, Seung-Beom Yi, Stephen C. Geist, Travis Zenyo Oba
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Patent number: 10052198Abstract: A coiled anchor for docking a mitral valve prosthesis at a native mitral valve of a heart has a first end, a second end, and a central axis extending between the first and second ends, and defines an inner space coaxial with the central axis. The coiled anchor includes a coiled core including a bio-compatible metal or metal alloy and having a plurality of turns extending around the central axis in a first position, and a cover layer around the core, the cover layer including a bio-compatible material that is less rigid than the metal or metal alloy of the coiled core.Type: GrantFiled: February 20, 2015Date of Patent: August 21, 2018Assignee: Mitral Valve Technologies SarlInventors: Mark Chau, Alexander J. Siegel, Paul A. Spence, Landon H. Tompkins