Patents by Inventor Youngjae Chun
Youngjae Chun 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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Publication number: 20230338034Abstract: A medical assembly includes a perfusion device that has a self-expandable stent. The stent has a proximal end portion and a distal end portion. The proximal end portion tapers from the distal end to a proximal end thereof. A blood-impermeable cover extends at least partially over the distal end portion and the proximal end portion of the stent. The perfusion device further includes an elongated shaft having a proximal end a distal end, wherein the distal end is fixedly secured to the proximal end of the proximal end portion of the stent. The assembly further includes a sheath configured to retain the stent and the cover is a radially collapsed state for insertion into a vessel of a patient, wherein the stent and the cover are expandable from the radially collapsed state to a radially expanded, deployed state within the vessel when deployed from the sheath.Type: ApplicationFiled: June 30, 2023Publication date: October 26, 2023Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, William W. Clark, Sung Kwon Cho, Youngjae Chun
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Patent number: 11793961Abstract: A temporary esophagus occlusion device for providing temporary occlusion of the esophagus during intubation of a in patient includes a frame configured to transition between a contracted state, in which it can be swallowed by the patient, and an expanded state, wherein in the expanded state, the frame has a maximum outer diameter sufficient to span an inner diameter of the esophagus of the patient. The device also includes a flexible cover connected to and extending over at least a portion of the frame when the frame is in the expanded state to at least partially block flow of fluid and/or solid materials through the esophagus and a guidewire attached to the frame, sized to be swallowed by the patient along with the frame and having a proximal end portion configured to remain external to the patient's body and a distal end connected to the frame.Type: GrantFiled: October 18, 2017Date of Patent: October 24, 2023Assignees: University of Pittsburgh—Of the Commonwealth System of Higher Education, UPMCInventors: Youngjae Chun, Philip Charles Carullo
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Patent number: 11737760Abstract: The present disclosure concerns embodiments of an implantable perfusion device that can be implanted in an injured blood vessel to control bleeding without occluding the vessel. In one specific implementation, the perfusion device can be implanted percutaneously into a patient's descending aorta to control bleeding at the site of a ruptured portion of the aorta (known as torso hemorrhage) while still allowing for the antegrade flow of blood from a location upstream of the ruptured portion of the aorta to a location downstream of the ruptured portion of the aorta. The perfusion device can be left inside the patient as the patient is transported to a medical facility where the injury can be repaired. Following repair of the vessel, the perfusion device can be withdrawn from the patient.Type: GrantFiled: August 6, 2019Date of Patent: August 29, 2023Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, William W. Clark, Sung Kwon Cho, Youngjae Chun
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Publication number: 20230157275Abstract: In one representative embodiment, a method of perfusing organs in a patient's body is provided. The method comprises isolating the visceral arteries and the visceral veins from blood circulating through the patient's heart and perfusing the visceral arteries, the visceral veins, and the abdominal organs with a perfusion fluid that is fluidly separated from the blood circulating through the patient's heart. While the visceral arteries and the visceral veins are isolated, and the visceral arteries, the visceral veins, and the abdominal organs are being perfused, the patient's blood is allowed to continue to circulate through the heart.Type: ApplicationFiled: January 9, 2023Publication date: May 25, 2023Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Amit D. Tevar, Youngjae Chun
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Publication number: 20230059358Abstract: A multi-lumen implantable device configured to deliver a therapeutic agent to a selected portion of a blood vessel is disclosed. As one example, an implantable device includes a first lumen configured to flow blood from an upstream end to a downstream end of the device when implanted in a blood vessel; a second lumen fluidly separated from the first lumen and configured for introducing a therapeutic agent to a selected, first portion of a wall of the blood vessel, between the upstream end and the downstream end of the device; and at least one sealing member configured to block the therapeutic agent from entering a second portion of the wall of the blood vessel, between the upstream end and the downstream end of the device.Type: ApplicationFiled: January 22, 2021Publication date: February 23, 2023Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Youngjae Chun
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Patent number: 11559055Abstract: In one representative embodiment, a method of perfusing organs in a patient's body is provided. The method comprises isolating the visceral arteries and the visceral veins from blood circulating through the patient's heart and perfusing the visceral arteries, the visceral veins, and the abdominal organs with a perfusion fluid that is fluidly separated from the blood circulating through the patient's heart. While the visceral arteries and the visceral veins are isolated, and the visceral arteries, the visceral veins, and the abdominal organs are being perfused, the patient's blood is allowed to continue to circulate through the heart.Type: GrantFiled: April 29, 2019Date of Patent: January 24, 2023Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Amit D. Tevar, Youngjae Chun
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Publication number: 20220160526Abstract: The invention relates to endovascular medical implant devices and materials of composition for forming these devices to provide improved mechanical properties and biodegradability. The devices include a combination or integration of superelastic material, biodegradable metal and, thin film nitinol and/or biodegradable polymer. A structural frame is formed of individual elongated pieces composed of biodegradable metal. These pieces are joined together by connector pieces composed of superelastic material. At least a portion of the structural frame has deposited thereon the thin film nitinol and/or biodegradable polymer. The structural frame of the device is collapsible for insertion in a delivery tube and, recoverable for deployment and placement in a vascular location of a patient body.Type: ApplicationFiled: December 2, 2020Publication date: May 26, 2022Applicant: UNIVERSITY OF PITTSBURGH - OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATIONInventors: YOUNGJAE CHUN, WILLIAM R. WAGNER, XINZHU GU, PETER DREW WEARDEN, TOMO YOSHIZUMI
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Publication number: 20210052363Abstract: Disclosed are implantable tubular devices having a fenestration in a wall of the tubular device and a conductive coil positioned around the fenestration, such that the coil is operable to generate a magnetic field when electrical current flows through the coil. The magnetic field can be used to draw a ferrous or magnetically tipped guidewire or other device to and through the fenestration. In the example of a fenestrated endovascular graft, the coil can be used to draw a guidewire out through a fenestration into a branch blood vessel, such that the guidewire can be used to deliver a branch of the graft through the fenestration into the branch vessel. A power source can be contained in a nosecone.Type: ApplicationFiled: January 8, 2019Publication date: February 25, 2021Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Catherine C. Go, Youngjae Chun
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Patent number: 10888442Abstract: The invention relates to endovascular medical implant devices and materials of composition for forming these devices to provide improved mechanical properties and biodegradability. The devices include a combination or integration of superelastic material, biodegradable metal and, thin film nitinol and/or biodegradable polymer. A structural frame is formed of individual elongated pieces composed of biodegradable metal. These pieces are joined together by connector pieces composed of superelastic material. At least a portion of the structural frame has deposited thereon the thin film nitinol and/or biodegradable polymer. The structural frame of the device is collapsible for insertion in a delivery tube and, recoverable for deployment and placement in a vascular location of a patient body.Type: GrantFiled: November 11, 2015Date of Patent: January 12, 2021Assignee: UNIVERSITY OF PITTSBURGH—OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATIONInventors: Youngjae Chun, William R. Wagner, Xinzhu Gu, Peter Drew Wearden, Tomo Yoshizumi
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Publication number: 20200179630Abstract: A temporary esophagus occlusion device for providing temporary occlusion of the esophagus during intubation of a in patient includes a frame configured to transition between a contracted state, in which it can be swallowed by the patient, and an expanded state, wherein in the expanded state, the frame has a maximum outer diameter sufficient to span an inner diameter of the esophagus of the patient. The device also includes a flexible cover connected to and extending over at least a portion of the frame when the frame is in the expanded state to at least partially block flow of fluid and/or solid materials through the esophagus and a guidewire attached to the frame, sized to be swallowed by the patient along with the frame and having a proximal end portion configured to remain external to the patient's body and a distal end connected to the frame.Type: ApplicationFiled: October 18, 2017Publication date: June 11, 2020Inventors: Youngjae Chun, Philip Charles Carullo
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Patent number: 10582995Abstract: Described herein are intra-oral prostheses that can help replace or augment the function of the native tongue, such as to assist with swallowing. Disclosed prostheses can provide mechanical force, based on the power of mastication, to propel a food bolus into the pharyngeal phase of swallowing. Disclosed prostheses can be used to enhance swallowing rehabilitation as a temporary aid and/or can be used to permanently replace lost tongue functionality. Also disclosed are other anatomical prostheses, such as to provide power for the articulation of dysfunctional extremities, by transforming mechanical force from another nearby functioning muscle group.Type: GrantFiled: February 26, 2015Date of Patent: March 10, 2020Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Neil Gildener-Leapman, Youngjae Chun
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Publication number: 20190374226Abstract: The present disclosure concerns embodiments of an implantable perfusion device that can be implanted in an injured blood vessel to control bleeding without occluding the vessel. In one specific implementation, the perfusion device can be implanted percutaneously into a patient's descending aorta to control bleeding at the site of a ruptured portion of the aorta (known as torso hemorrhage) while still allowing for the antegrade flow of blood from a location upstream of the ruptured portion of the aorta to a location downstream of the ruptured portion of the aorta. The perfusion device can be left inside the patient as the patient is transported to a medical facility where the injury can be repaired. Following repair of the vessel, the perfusion device can be withdrawn from the patient.Type: ApplicationFiled: August 6, 2019Publication date: December 12, 2019Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, William W. Clark, Sung Kwon Cho, Youngjae Chun
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Patent number: 10413301Abstract: The present disclosure concerns embodiments of an implantable perfusion device that can be implanted in an injured blood vessel to control bleeding without occluding the vessel. In one specific implementation, the perfusion device can be implanted percutaneously into a patient's descending aorta to control bleeding at the site of a ruptured portion of the aorta (known as torso hemorrhage) while still allowing for the antegrade flow of blood from a location upstream of the ruptured portion of the aorta to a location downstream of the ruptured portion of the aorta. The perfusion device can be left inside the patient as the patient is transported to a medical facility where the injury can be repaired. Following repair of the vessel, the perfusion device can be withdrawn from the patient.Type: GrantFiled: July 10, 2014Date of Patent: September 17, 2019Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, William W. Clark, Sung Kwon Cho, Youngjae Chun
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Publication number: 20190246631Abstract: In one representative embodiment, a method of perfusing organs in a patient's body is provided. The method comprises isolating the visceral arteries and the visceral veins from blood circulating through the patient's heart and perfusing the visceral arteries, the visceral veins, and the abdominal organs with a perfusion fluid that is fluidly separated from the blood circulating through the patient's heart. While the visceral arteries and the visceral veins are isolated, and the visceral arteries, the visceral veins, and the abdominal organs are being perfused, the patient's blood is allowed to continue to circulate through the heart.Type: ApplicationFiled: April 29, 2019Publication date: August 15, 2019Applicant: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Amit D. Tevar, Youngjae Chun
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Patent number: 10278384Abstract: In one representative embodiment, a method of perfusing organs in a patient's body is provided. The method comprises isolating the visceral arteries and the visceral veins from blood circulating through the patient's heart and perfusing the visceral arteries, the visceral veins, and the abdominal organs with a perfusion fluid that is fluidly separated from the blood circulating through the patient's heart. While the visceral arteries and the visceral veins are isolated, and the visceral arteries, the visceral veins, and the abdominal organs are being perfused, the patient's blood is allowed to continue to circulate through the heart.Type: GrantFiled: December 2, 2014Date of Patent: May 7, 2019Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Bryan W. Tillman, Amit D. Tevar, Youngjae Chun
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Patent number: 9833309Abstract: A vascular implant, comprising a sheet comprising thin film nickel titanium (NiTi), wherein the sheet has at least one super-hydrophilic surface having a water contact angle of less than approximately 5 degrees. The sheet is configured to have a compacted form having a first internal diameter and a deployed form having a second internal diameter larger than the first internal diameter. The sheet may be delivered into a blood vessel in the compacted form and expanded to its deployed form at a treatment location within the blood vessel, wherein the stent is configured to expand onto an internal surface of the blood vessel and exert a radial force on said internal surface.Type: GrantFiled: September 1, 2011Date of Patent: December 5, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Daniel S. Levi, Gregory P. Carman, Youngjae Chun, Fernando Vinuela
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Publication number: 20170340463Abstract: The invention relates to endovascular medical implant devices and materials of composition for forming these devices to provide improved mechanical properties and biodegradability. The devices include a combination or integration of superelastic material, biodegradable metal and, thin film nitinol and/or biodegradable polymer. A structural frame is formed of individual elongated pieces composed of biodegradable metal. These pieces are joined together by connector pieces composed of superelastic material. At least a portion of the structural frame has deposited thereon the thin film nitinol and/or biodegradable polymer. The structural frame of the device is collapsible for insertion in a delivery tube and, recoverable for deployment and placement in a vascular location of a patient body.Type: ApplicationFiled: November 11, 2015Publication date: November 30, 2017Applicant: UNIVERSITY OF PITTSBURGH-OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATIONInventors: YOUNGJAE CHUN, WILLIAM R. WAGNER, XINZHU GU, PETER DREW WEARDEN, TOMO YOSHIZUMI
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Patent number: 9730783Abstract: A flow diverter is described and fabricated using ultra-thin porous thin-film Nitinol, and is configured for implantation to a treatment site within a vessel for significant reduction in an intra-aneurismal flow velocity and vorticity. Using small size pores in a coverage area of only 10%, a 90% reduction in flow velocity into a pseudo-aneurysm can be achieved, with an almost immediate cessation of flow into an anatomical feature such as aneurysm sac in vivo. The size of the holes can be tailored to be any shape and range in size from 1-400 ?m using photolithography and from 5-1000 nm using ebeam lithography.Type: GrantFiled: November 3, 2012Date of Patent: August 15, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Gregory P. Carman, Daniel S. Levi, Youngjae Chun, Fernando Vinuela
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Publication number: 20170164605Abstract: In one representative embodiment, a method of perfusing organs in a patient's body is provided. The method comprises isolating the visceral arteries and the visceral veins from blood circulating through the patient's heart and perfusing the visceral arteries, the visceral veins, and the abdominal organs with a perfusion fluid that is fluidly separated from the blood circulating through the patient's heart. While the visceral arteries and the visceral veins are isolated, and the visceral arteries, the visceral veins, and the abdominal organs are being perfused, the patient's blood is allowed to continue to circulate through the heart.Type: ApplicationFiled: December 2, 2014Publication date: June 15, 2017Applicant: University of Pittsburgh - Of the Commonwealth Sys tem of Higher EducationInventors: Bryan W. Tillman, Amit D. Tevar, Youngjae Chun
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Publication number: 20170165048Abstract: The present invention relates to a device for changing a course of a vessel, a method of introducing the device, a method of changing a course of a vessel using the device, and a treatment method of brain-nervous system diseases, such as neurovascular compression syndrome, using the device. In treating a neurovascular compression syndrome, the present invention can reduce risks and side effects of the microsurgery (MVD), such as hearing loss or facial paralysis that may occur due to the microsurgery. Further, since an area of a metal surface is small, a risk of in-stent stenosis or thrombus generation is low even in a vessel of the brain having a small diameter, and a degree of vascular compression by its radial force is low, thereby making it possible to minimize intimal hyperplasia.Type: ApplicationFiled: December 7, 2016Publication date: June 15, 2017Inventors: Joonho Chung, Youngjae Chun