Patents by Inventor Chetan Pasrija
Chetan Pasrija 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: 20240033082Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: ApplicationFiled: July 29, 2022Publication date: February 1, 2024Inventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Patent number: 11872133Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: GrantFiled: July 29, 2022Date of Patent: January 16, 2024Assignee: University of Maryland, Baltimore; University of Maryland Medical System LLCInventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Publication number: 20230248939Abstract: A modular cannula for drainage and return of fluids from and to a body, such as the body of a patient, is adjustable to enable an operator to achieve desired flow characteristics during such fluid drainage and return procedures. The modular, dual-lumen cannula system has an outer drainage cannula and an inner return cannula that is moveable with respect to the outer drainage cannula. By enabling movement of the inner return cannula with respect to the outer drainage cannula, a distance between return outlet ports at the distal end of the return cannula and drainage ports at the distal end of the drainage cannula may be manually adjusted. Such adjustable distance allows for optimal positioning of both the drainage and return ports that are particularly adapted to an individual patient’s physiology, in turn enabling optimal fluid flow characteristics to be achieved regardless of that patient physiology.Type: ApplicationFiled: February 10, 2023Publication date: August 10, 2023Inventors: Bartley P. Griffith, Zhongjun Wu, Chetan Pasrija, Aakash Yogesh Shah, Zachary Kon
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Publication number: 20220395371Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: ApplicationFiled: January 25, 2022Publication date: December 15, 2022Inventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Patent number: 11523808Abstract: The present invention provides transseptal puncture devices configured to access structures on the left side of the heart from the right side of the heart without requiring open-heart surgery. The devices have adjustable stiffness to enter the vasculature in a flexible, atraumatic fashion, then become rigid once in place to provide a stable platform for penetration of the fossa ovalis. The devices are further configured to controllably and stably extend a needle to puncture the FO. The devices include an indwelling blunt stylus that can extend perpendicularly from the device to increase the accuracy of placement near the fossa ovalis.Type: GrantFiled: September 20, 2019Date of Patent: December 13, 2022Assignees: University of Maryland, Baltimore, University of Maryland Medical Center, LLCInventors: James S. Gammie, Rachael Quinn, Chetan Pasrija
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Publication number: 20220313888Abstract: Disclosed herein is a bidirectional intravascular cannula, or catheter, that is configured to provide and return blood in a patient bidirectionally. The bidirectional intravascular cannula is configured to reduce or obviate the need for a second cannula, such as currently available unidirectional cannulae, to be placed in a second or opposite direction of flow. Users would include cardiac surgeons, intensivists, vascular surgeons, ER doctors, IR doctors and cardiologist who use peripheral cannulation for ECLS or cardiopulmonary bypass. The cannula allows continued flow to a patient's limb even with the cannula proximally in the vessel. The cannula further allows larger size cannula to be placed without the need for additional distal catheter placement.Type: ApplicationFiled: June 21, 2022Publication date: October 6, 2022Inventors: Zachary KON, Mehrdad GHOREISHI, Chetan PASRIJA, Bartley GRIFFITH, Gregory BITTLE
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Publication number: 20220273431Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: ApplicationFiled: January 25, 2022Publication date: September 1, 2022Inventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Publication number: 20220249126Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: ApplicationFiled: November 15, 2021Publication date: August 11, 2022Applicants: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. GAMMIE, Philip J. HAARSTAD, David BLAESER, Ryan BAUER, Stephen ROLLER, Rachael QUINN, Chetan PASRIJA, Edwin HLAVKA
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Patent number: 11364333Abstract: Disclosed herein is a bidirectional intravascular cannula, or catheter, that is configured to provide and return blood in a patient bidirectionally. The bidirectional intravascular cannula is configured to reduce or obviate the need for a second cannula, such as currently available unidirectional cannulae, to be placed in a second or opposite direction of flow. Users would include cardiac surgeons, intensivists, vascular surgeons, ER doctors, IR doctors and cardiologist who use peripheral cannulation for ECLS or cardiopulmonary bypass. The cannula allows continued flow to a patient's limb even with the cannula proximally in the vessel. The cannula further allows larger size cannula to be placed without the need for additional distal catheter placement.Type: GrantFiled: October 10, 2018Date of Patent: June 21, 2022Assignees: UNIVERSITY OF MARYLAND, BALTIMORE, UNIVERSITY OF MARYLAND MEDICAL CENTER, LLCInventors: Zachary Kon, Mehrdad Ghoreishi, Chetan Pasrija, Bartley Griffith, Gregory Bittle
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Patent number: 11259925Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: GrantFiled: May 29, 2020Date of Patent: March 1, 2022Assignees: University of Maryland, Baltimore, University of Maryland Medical System LLCInventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Patent number: 11172960Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: GrantFiled: March 4, 2021Date of Patent: November 16, 2021Assignees: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. Gammie, Philip J. Haarstad, David Blaeser, Ryan Bauer, Stephen Roller, Rachael Quinn, Chetan Pasrija, Edwin Hlavka
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Patent number: 11154325Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: GrantFiled: May 10, 2021Date of Patent: October 26, 2021Assignees: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. Gammie, Philip J. Haarstad, David Blaeser, Ryan Bauer, Stephen Roller, Rachael Quinn, Chetan Pasrija, Edwin Hlavka
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Publication number: 20210259738Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: ApplicationFiled: May 10, 2021Publication date: August 26, 2021Applicants: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. GAMMIE, Philip J. HAARSTAD, David BLAESER, Ryan BAUER, Stephen ROLLER, Rachael QUINN, Chetan PASRIJA, Edwin HLAVKA
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Publication number: 20210196320Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: ApplicationFiled: March 4, 2021Publication date: July 1, 2021Applicants: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. GAMMIE, Philip J. HAARSTAD, David BLAESER, Ryan BAUER, Stephen ROLLER, Rachael QUINN, Chetan PASRIJA, Edwin HLAVKA
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Patent number: 11045224Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: GrantFiled: April 24, 2020Date of Patent: June 29, 2021Assignees: University of Maryland, Baltimore, University of Maryland Medical System LLC, Protaryx Medical Inc.Inventors: James S. Gammie, Philip J. Haarstad, David Blaeser, Ryan Bauer, Stephen Roller, Rachael Quinn, Chetan Pasrija, Edwin Hlavka
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Publication number: 20200345495Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treat mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: ApplicationFiled: May 29, 2020Publication date: November 5, 2020Inventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Publication number: 20200306440Abstract: Disclosed herein is a bidirectional intravascular cannula, or catheter, that is configured to provide and return blood in a patient bidirectionally. The bidirectional intravascular cannula is configured to reduce or obviate the need for a second cannula, such as currently available unidirectional cannulae, to be placed in a second or opposite direction of flow. Users would include cardiac surgeons, intensivists, vascular surgeons, ER doctors, IR doctors and cardiologist who use peripheral cannulation for ECLS or cardiopulmonary bypass. The cannula allows continued flow to a patient's limb even with the cannula proximally in the vessel. The cannula further allows larger size cannula to be placed without the need for additional distal catheter placement.Type: ApplicationFiled: October 10, 2018Publication date: October 1, 2020Inventors: Zachary KON, Mehrdad GHOREISHI, Chetan PASRIJA, Bartley GRIFFITH, Gregory BITTLE
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Publication number: 20200306043Abstract: The present invention provides devices for treating functional mitral regurgitation and methods of use thereof. The devices translocate a subject's mitral valve in an apical direction. The devices thereby treats mitral regurgitation while preserving a subject's original mitral valve and chordae tendinae.Type: ApplicationFiled: November 5, 2018Publication date: October 1, 2020Inventors: James Gammie, Rachael Quinn, Chetan Pasrija
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Publication number: 20200246046Abstract: In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.Type: ApplicationFiled: April 24, 2020Publication date: August 6, 2020Inventors: James S. GAMMIE, Philip J. HAARSTAD, David BLAESER, Ryan BAUER, Stephen ROLLER, Rachael QUINN, Chetan PASRIJA, Edwin HLAVKA
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Publication number: 20200229805Abstract: The present invention provides transseptal puncture devices configured to access structures on the left side of the heart from the right side of the heart without requiring open-heart surgery. The devices have adjustable stiffness to enter the vasculature in a flexible, atraumatic fashion, then become rigid once in place to provide a stable platform for penetration of the fossa ovalis. The devices are further configured to controllably and stably extend a needle to puncture the FO. The devices include an indwelling blunt stylus that can extend perpendicularly from the device to increase the accuracy of placement near the fossa ovalis.Type: ApplicationFiled: February 11, 2020Publication date: July 23, 2020Applicants: University of Maryland, Baltimore, University of Maryland Medical System, LLCInventors: James S. GAMMIE, Rachael QUINN, Chetan PASRIJA