Patents by Inventor Alexandre Ioan Romoscanu
Alexandre Ioan Romoscanu 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: 11918762Abstract: A uni-directional, plunger-type electrophysiology catheter handle is designed to reduce the input force a user must apply to deflect the distal end of the catheter. A force amplifier is operatively coupled to a deflection actuator of the handle. The force amplifier can be a pulley or a system of gears. The force amplifier can increase the output force of deflection actuator by the same factor as that by which the user input force is reduced. A variable-friction autolocking system can also be used to reduce the input force a user must apply during initial deflection as compared to later deflection of the catheter.Type: GrantFiled: October 2, 2019Date of Patent: March 5, 2024Assignee: St. Jude Medical, Cardiology Division, Inc.Inventors: Varun D. Bansal, Michael S. Bowers, Alexandre Ioan Romoscanu
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Publication number: 20240058145Abstract: A method for retracting a sheath from over an expandable medical device. The method includes rotating a lever, which protrudes from a shell of a handle, proximally, such that the lever proximally moves, by a first distance, a carriage disposed within the shell and coupled to the sheath. Subsequently to rotating the lever, the lever slides proximally such that the lever moves the carriage proximally by a second distance.Type: ApplicationFiled: October 30, 2023Publication date: February 22, 2024Inventors: Juan Rigla, Shmuel Vered, Itshak Cohen, Ryan Vincent Tien Sing Young, Alexandre Ioan Romoscanu
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Patent number: 11839561Abstract: An apparatus for retracting a sheath from over an expandable medical device includes a shell, configured to couple to a longitudinal element, a carriage disposed within the shell and configured to couple to the sheath, and a lever protruding from the shell. The lever is configured to retract the sheath while a distal end of the longitudinal element contacts the expandable medical device, by rotating proximally so as to move the carriage proximally by a first distance, and, subsequently to rotating proximally, sliding proximally so as to move the carriage proximally by a second distance. Other embodiments are also described.Type: GrantFiled: January 21, 2021Date of Patent: December 12, 2023Assignee: INSPIRE M.D LTD.Inventors: Juan Rigla, Shmuel Vered, Itshak Cohen, Ryan Vincent Tien Sing Young, Alexandre Ioan Romoscanu
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Publication number: 20230165655Abstract: A force sensor assembly for use in the field of cardiac ablation, for the ablation-based treatment of atrial fibrillation and other cardiac arrhythmias. Various embodiments of the disclosure are directed to a catheter distal force sensor for measuring catheter tip-to-endocardial wall force by measuring displacement of irradiation patterns sensed with a two-dimensional imaging sensor. The disclosed devices sense an array of irradiation pattern characteristics, including changes in size and location of irradiation shapes of the irradiation pattern. In some embodiments, multiple irradiation spots are tracked with the two-dimensional imaging sensor to infer the components of a reaction force vector acting the force sensor assembly. The disclosed force is designed to accommodate typical catheter tip dimensions, the outer diameter of these usually being less than or equal to 9 French (3 mm).Type: ApplicationFiled: April 8, 2021Publication date: June 1, 2023Inventors: Alexandre Ioan Romoscanu, Norbert Sylvain Giraud, Ryan Vincent Tien Sing Young, Nicolas Paul Gabriel Guinamard
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Publication number: 20220226135Abstract: An apparatus for retracting a sheath from over an expandable medical device includes a shell, configured to couple to a longitudinal element, a carriage disposed within the shell and configured to couple to the sheath, and a lever protruding from the shell. The lever is configured to retract the sheath while a distal end of the longitudinal element contacts the expandable medical device, by rotating proximally so as to move the carriage proximally by a first distance, and, subsequently to rotating proximally, sliding proximally so as to move the carriage proximally by a second distance. Other embodiments are also described.Type: ApplicationFiled: January 21, 2021Publication date: July 21, 2022Inventors: Juan Rigla, Shmuel Vered, Itshak Cohen, Ryan Vincent Tien Sing Young, Alexandre Ioan Romoscanu
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Patent number: 10632287Abstract: A steering handle for a catheter. The steering handle includes a thumb knob arrangement for driving a cam assembly that in turn actuates a pull wire or pull wires. In some embodiments, the cam assembly includes a set of dual pins that actuate the pull wire in a quasi-linear relationship between cam rotation and axial displacement of the wire. In certain embodiments, the second set of dual pins imparts a reverse action on a second pull wire, also in quasi-linear fashion. That is, when one wire is released by the cam assembly, the other wire is taken in by the cam assembly. In various embodiments, the quasi-linear action can cause release of more pull wire than is taken in, thereby helping prevent the released pull wire to act as an unwanted counter force to the actuated pull wire.Type: GrantFiled: May 30, 2017Date of Patent: April 28, 2020Assignee: St. Jude Medical International Holding S.à r.l.Inventors: Alexandre Ioan Romoscanu, Timothy J. Wood
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Patent number: 10010700Abstract: A plunger-type control handle for controlling the deflection of a distal tip of a catheter. The control handle includes a spool driven by a gear, the spool being connected to the proximal end of at least one pull wire. For bi-directional deflection, a second proximal end of a pull wire is connected to the spool such that when one of the proximal ends is collected by the spool, the other of the proximal ends is released in an equal amount. The gear is operatively coupled to the plunger and engages a gear rack disposed on the control handle housing, such that when there is relative movement between the housing and the plunger, the gear and spool are rotated. In one embodiment, a switching mechanism is provided that reverses the rotation direction of the gear and spool, thereby providing full stroke resolution of the plunger in each of the bi-directional directions.Type: GrantFiled: July 15, 2015Date of Patent: July 3, 2018Assignee: ST JUDE MEDICAL INTERNATIONAL HOLDING S.À FInventor: Alexandre Ioan Romoscanu
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Patent number: 9855404Abstract: A bi-directional steerable catheter that, for a given tip deflection angle, generates a first articulation radius in a first lateral direction and a second articulation radius in a second lateral direction, the second articulation radius being different than the first articulation radius. The catheter includes two pull wire portions that can be individually and selectively put under tension to cause deflection of the tip in a corresponding lateral direction. Actuation of a first of the pull wire portions causes a shift in the neutral axis of the catheter over a portion of the steering section, resulting in articulation over a shorter length of the steering section and thus a smaller bend radius. Actuation of a second of the pull wire portions does not result in a neutral axis shift, so that articulation is over substantially the entire length of the steering section, resulting in a larger bend radius.Type: GrantFiled: August 27, 2013Date of Patent: January 2, 2018Assignee: St. Jude Medical International Holding S.à r.l.Inventor: Alexandre Ioan Romoscanu
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Publication number: 20170326337Abstract: A steering handle for a catheter. The steering handle includes a thumb knob arrangement for driving a cam assembly that in turn actuates a pull wire or pull wires. In some embodiments, the cam assembly includes a set of dual pins that actuate the pull wire in a quasi-linear relationship between cam rotation and axial displacement of the wire. In certain embodiments, the second set of dual pins imparts a reverse action on a second pull wire, also in quasi-linear fashion. That is, when one wire is released by the cam assembly, the other wire is taken in by the cam assembly. In various embodiments, the quasi-linear action can cause release of more pull wire than is taken in, thereby helping prevent the released pull wire to act as an unwanted counter force to the actuated pull wire.Type: ApplicationFiled: May 30, 2017Publication date: November 16, 2017Inventors: Alexandre Ioan Romoscanu, Timothy J. Wood
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Patent number: 9687631Abstract: A steering handle for a catheter. The steering handle includes a thumb knob arrangement for driving a cam assembly that in turn actuates a pull wire or pull wires. In some embodiments, the cam assembly includes a set of dual pins that actuate the pull wire in a quasi-linear relationship between cam rotation and axial displacement of the wire. In certain embodiments, the second set of dual pins imparts a reverse action on a second pull wire, also in quasi-linear fashion. That is, when one wire is released by the cam assembly, the other wire is taken in by the cam assembly. In various embodiments, the quasi-linear action can cause release of more pull wire than is taken in, thereby helping prevent the released pull wire to act as an unwanted counter force to the actuated pull wire.Type: GrantFiled: October 30, 2015Date of Patent: June 27, 2017Assignee: St Jude Medical International Holding S.àr.l.Inventors: Alexandre Ioan Romoscanu, Timothy J. Wood
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Publication number: 20160158496Abstract: A steering handle for a catheter. The steering handle includes a thumb knob arrangement for driving a cam assembly that in turn actuates a pull wire or pull wires. In some embodiments, the cam assembly includes a set of dual pins that actuate the pull wire in a quasi-linear relationship between cam rotation and axial displacement of the wire. In certain embodiments, the second set of dual pins imparts a reverse action on a second pull wire, also in quasi-linear fashion. That is, when one wire is released by the cam assembly, the other wire is taken in by the cam assembly. In various embodiments, the quasi-linear action can cause release of more pull wire than is taken in, thereby helping prevent the released pull wire to act as an unwanted counter force to the actuated pull wire.Type: ApplicationFiled: October 30, 2015Publication date: June 9, 2016Inventors: Alexandre Ioan Romoscanu, Timothy J. Wood
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Patent number: 9174024Abstract: A steering handle for a catheter. The steering handle includes a thumb knob arrangement for driving a cam assembly that in turn actuates a pull wire or pull wires. In some embodiments, the cam assembly includes a set of dual pins that actuate the pull wire in a quasi-linear relationship between cam rotation and axial displacement of the wire. In certain embodiments, the second set of dual pins imparts a reverse action on a second pull wire, also in quasi-linear fashion. That is, when one wire is released by the cam assembly, the other wire is taken in by the cam assembly. In various embodiments, the quasi-linear action can cause release of more pull wire than is taken in, thereby helping prevent the released pull wire to act as an unwanted counter force to the actuated pull wire.Type: GrantFiled: March 15, 2013Date of Patent: November 3, 2015Assignee: ST. JUDE MEDICAL LUXEMBOURG HOLDINGS S.À.R.L.Inventors: Alexandre Ioan Romoscanu, Timothy J. Wood
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Patent number: 9095682Abstract: A plunger-type control handle for controlling the deflection of a distal tip of a catheter. The control handle includes a spool driven by a gear, the spool being connected to the proximal end of at least one pull wire. For bi-directional deflection, a second proximal end of a pull wire is connected to the spool such that when one of the proximal ends is collected by the spool, the other of the proximal ends is released in an equal amount. The gear is operatively coupled to the plunger and engages a gear rack disposed on the control handle housing, such that when there is relative movement between the housing and the plunger, the gear and spool are rotated. In one embodiment, a switching mechanism is provided that reverses the rotation direction of the gear and spool, thereby providing full stroke resolution of the plunger in each of the bi-directional directions.Type: GrantFiled: June 28, 2013Date of Patent: August 4, 2015Assignee: St. Jude Medical Luxembourg Holding S.à.r.l.Inventor: Alexandre Ioan Romoscanu
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Publication number: 20140330251Abstract: A bi-directional steerable catheter that, for a given tip deflection angle, generates a first articulation radius in a first lateral direction and a second articulation radius in a second lateral direction, the second articulation radius being different than the first articulation radius. The catheter includes two pull wire portions that can be individually and selectively put under tension to cause deflection of the tip in a corresponding lateral direction. Actuation of a first of the pull wire portions causes a shift in the neutral axis of the catheter over a portion of the steering section, resulting in articulation over a shorter length of the steering section and thus a smaller bend radius. Actuation of a second of the pull wire portions does not result in a neutral axis shift, so that articulation is over substantially the entire length of the steering section, resulting in a larger bend radius.Type: ApplicationFiled: August 27, 2013Publication date: November 6, 2014Inventor: Alexandre Ioan Romoscanu
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Publication number: 20140324015Abstract: A plunger-type control handle for controlling the deflection of a distal tip of a catheter. The control handle includes a spool driven by a gear, the spool being connected to the proximal end of at least one pull wire. For bi-directional deflection, a second proximal end of a pull wire is connected to the spool such that when one of the proximal ends is collected by the spool, the other of the proximal ends is released in an equal amount. The gear is operatively coupled to the plunger and engages a gear rack disposed on the control handle housing, such that when there is relative movement between the housing and the plunger, the gear and spool are rotated. In one embodiment, a switching mechanism is provided that reverses the rotation direction of the gear and spool, thereby providing full stroke resolution of the plunger in each of the bi-directional directions.Type: ApplicationFiled: June 28, 2013Publication date: October 30, 2014Applicant: Endosense SAInventor: Alexandre Ioan Romoscanu
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Patent number: 8668946Abstract: The present invention concerns a solid product comprising oil-droplets having a diameter in the range of 0.1 to 100 microns, cross-linked proteins at the interface of said droplets and any polar, low molecular compound in between the cross-linked protein interfaces.Type: GrantFiled: March 30, 2012Date of Patent: March 11, 2014Assignee: Nestec S.A.Inventors: Alexandre Ioan Romoscanu, Raffaele Mezzenga
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Patent number: 8147896Abstract: The present invention concerns a solid product comprising oil-droplets having a diameter in the range of 0.1 to 100 microns, cross-linked proteins at the interface of said droplets and any polar, low molecular compound in between the cross-linked protein interfaces.Type: GrantFiled: March 14, 2007Date of Patent: April 3, 2012Assignee: Nestec S.A.Inventors: Alexandre Ioan Romoscanu, Raffaele Mezzenga
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Publication number: 20090304896Abstract: The present invention concerns a solid product comprising oil-droplets having a diameter in the range of 0.1 to 100 microns, cross-linked proteins at the interface of said droplets and any polar, low molecular compound in between the cross-linked protein interfaces.Type: ApplicationFiled: March 14, 2007Publication date: December 10, 2009Applicant: NESTEC S.A.Inventors: Alexandre Ioan Romoscanu, Raffaele Mezzenga