Patents by Inventor Yuki MASUBUCHI
Yuki MASUBUCHI 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).
-
Publication number: 20240058030Abstract: A medical device is disclosed that can effectively destroy an object in a biological lumen, a method for controlling rotation of the medical device, and a rotation controller. The medical device to be inserted into a biological lumen to destroy a thrombus in the biological lumen includes an elongated shaft portion that is rotationally driven, a drive unit that rotates the shaft portion, a breaking member that is provided at a distal portion of the shaft portion and is rotatable, and a control unit that controls the rotation of the drive unit, in which the control unit controls the drive unit to repeat the rotation while interposing a stop of the rotation between rotations of the drive unit.Type: ApplicationFiled: November 2, 2023Publication date: February 22, 2024Applicant: TERUMO KABUSHIKI KAISHAInventors: Takashi KITAOKA, Masaomi IMAI, Kazuaki KANAMOTO, Yuki MASUBUCHI
-
Publication number: 20240016514Abstract: A medical device for removing an object from a biological lumen, includes a rotatable structure for removing the object, a rotatable shaft to which the rotatable structure is connected at a distal portion of the shaft, a motor connected to the shaft and configured to generate a rotational force that is applied to the shaft, a motor drive circuit connectable to a power supply and configured to supply a current to the motor in a first direction to cause the motor to generate a rotational force in a first rotational direction and in a second direction that is opposite to the first direction to cause the motor to generate a rotational force in a second rotational direction that is opposite to the first rotational direction.Type: ApplicationFiled: September 27, 2023Publication date: January 18, 2024Inventors: Yuki MASUBUCHI, Takashi KITAOKA, Julia WERNING, Ed SOLOMON
-
Publication number: 20240000479Abstract: A medical device includes an expansion portion that rotates to break-up an object and that is prevented from receiving excessive force. The expansion portion is at a distal part of a shaft portion, a connection portion is fixed to a proximal part of the expansion portion, and an outer tube accommodates the shaft portion. The outer tube includes distal and proximal contact portions. The connection portion includes a first restricting portion distal to the distal contact portion and a second restricting portion proximal to the distal contact portion. An operation unit of the medical device includes a housing, a lever member fixed to the outer tube, and an elastic member that applies a force moving the outer tube in a distal direction to the outer tube. When the elastic member pushes the proximal contact portion in the distal direction, the distal contact portion is proximal to the first restricting portion.Type: ApplicationFiled: September 19, 2023Publication date: January 4, 2024Applicant: TERUMO KABUSHIKI KAISHAInventors: Takashi KITAOKA, Yuki MASUBUCHI
-
Patent number: 11826072Abstract: A medical device is disclosed that can effectively destroy an object in a biological lumen, a method for controlling rotation of the medical device, and a rotation controller. The medical device to be inserted into a biological lumen to destroy a thrombus in the biological lumen includes a long shaft portion that is rotationally driven, a drive unit that rotates the shaft portion, a breaking member that is provided at a distal portion of the shaft portion and is rotatable, and a control unit that controls the rotation of the drive unit, in which the control unit controls the drive unit to repeat the rotation while interposing a stop of the rotation between rotations of the drive unit.Type: GrantFiled: March 26, 2020Date of Patent: November 28, 2023Assignee: TERUMO KABUSHIKI KAISHAInventors: Takashi Kitaoka, Masaomi Imai, Kazuaki Kanamoto, Yuki Masubuchi
-
Publication number: 20230329735Abstract: A medical device insertable into a blood vessel for effectively removing an object flowing in a biological lumen while reducing the burden on the living body includes an elongated shaft portion, and an expansion portion which is an elastically deformable cylindrical body having a plurality of gaps and in which a proximal portion or a distal portion of the cylindrical body is interlocked with the shaft portion. The expansion portion has a ring-shaped or annular bent portion which protrudes toward a proximal side position radially outside the expansion portion in a bent state of being bent along an axial direction, and an axial length of a second portion from the bent portion to a proximal end of the expansion portion is shorter than an axial length of a first portion from the bent portion to the distal end of the expansion portion.Type: ApplicationFiled: June 19, 2023Publication date: October 19, 2023Applicant: TERUMO KABUSHIKI KAISHAInventors: Masaomi IMAI, Takahiro CHIDA, Yuki MASUBUCHI, Takashi KITAOKA, Kazuaki KANAMOTO
-
Publication number: 20230255659Abstract: A removal device and a removal system are configured to effectively remove an object in a body lumen while suppressing damage to another device. The removal device includes an elongated shaft part, and a cutting part fixed to a distal portion of the shaft part. The proximal portion of the cutting part includes a ringshaped cutting blade, and a surface of the cutting part on which the cutting blade is positioned is inclined relative to center axis of the shaft part at an angle greater than 0 degrees and less than 90 degrees.Type: ApplicationFiled: April 3, 2023Publication date: August 17, 2023Applicant: TERUMO KABUSHIKI KAISHAInventors: Masaomi IMAI, Takashi KITAOKA, Kazuaki KANAMOTO, Yuki MASUBUCHI
-
Patent number: 11690638Abstract: A medical device to be inserted into a blood vessel for effectively removing an object flowing in a biological lumen while reducing the burden on the living body includes an elongated shaft portion, and an expansion portion which is an elastically deformable cylindrical body having a plurality of gaps and in which a proximal portion or a distal portion of the cylindrical body is interlocked with the shaft portion. The expansion portion has a ring-shaped or annular bent portion which protrudes toward a proximal side position radially outside the expansion portion in a bent state of being bent along an axial direction, and an axial length of a second portion from the bent portion to a proximal end of the expansion portion is shorter than an axial length of a first portion from the bent portion to the distal end of the expansion portion.Type: GrantFiled: July 22, 2021Date of Patent: July 4, 2023Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Takahiro Chida, Yuki Masubuchi, Takashi Kitaoka, Kazuaki Kanamoto
-
Patent number: 11672642Abstract: A filter device insertable into a biological lumen includes a shaft portion and an elastically deformable portion interlocked with the shaft portion, the deformable portion having a plurality of wires braided in a mesh shape. The wires include wires of a first type, each having a diameter d. A sum of d3 of all of the wires is 0.08 to 0.25 mm3.Type: GrantFiled: March 8, 2021Date of Patent: June 13, 2023Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Kazuaki Kanamoto, Takashi Kitaoka, Yuki Masubuchi
-
Patent number: 11642151Abstract: A removal device and a removal system are configured to effectively remove an object in a body lumen while suppressing damage to another device. The removal device includes an elongated shaft part, and a cutting part fixed to a distal portion of the shaft part. The proximal portion of the cutting part includes a ring-shaped cutting blade, and a surface of the cutting part on which the cutting blade is positioned is inclined relative to center axis of the shaft part at an angle greater than 0 degrees and less than 90 degrees.Type: GrantFiled: September 10, 2020Date of Patent: May 9, 2023Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Takashi Kitaoka, Kazuaki Kanamoto, Yuki Masubuchi
-
Patent number: 11627982Abstract: A method and device handle having a slide assembly for controlling rotational speed of a catheter assembly under various rotational loads. The method includes setting a first current limit in a processor, activating the catheter assembly to rotate, calculating a current value in rotational period of a first current limit, updating a second current limit from the first current limit, and wherein the second current limit is lower than the first current limit.Type: GrantFiled: March 15, 2019Date of Patent: April 18, 2023Assignee: TERUMO KABUSHIKI KAISHAInventors: Yuki Masubuchi, Steve Woodard, Mansour Saleki
-
Publication number: 20220273333Abstract: A medical device and a treatment method are disclosed capable of breaking an object in a body lumen efficiently with a lower burden on body lumen tissues. A medical device is disclosed that is inserted into the body lumen so as to crush an object in the body lumen, the medical device including: an elongated shaft that is to be rotatably driven, and a deformable breaking member that is connected to the shaft so as to be rotatable and extends along the shaft. The breaking member has a first contact portion and a second contact portion. The first contact portion is located most outward in the radial direction of the breaking member in a state in which the breaking member is expanded radially outward. The second contact portion is located more outward in the radial direction of the breaking member than the first contact portion in a contracted state.Type: ApplicationFiled: May 17, 2022Publication date: September 1, 2022Applicant: TERUMO KABUSHIKI KAISHAInventors: Takashi KITAOKA, Masaomi IMAI, Yuki MASUBUCHI, Takahiro CHIDA, Kazuaki KANAMOTO, Hideki FUJIMAGARI
-
Publication number: 20220233212Abstract: A medical device for crushing an object in a body lumen, the medical device including: an elongated shaft portion rotatably driven; a crushing unit provided with bendable wire rods and rotatable together with the shaft portion; and a sliding unit fixed to each of end portion of the wire rods on at least one of a distal side of and a proximal side of the wire rods and is interlocked with the shaft portion so as to be slidable in an axial direction of the shaft portion. The shaft portion is provided with contact portions that come into contact with the sliding unit during rotation and limit relative rotation of the shaft portion and the sliding unit. After the sliding unit is attached to the contact portions, the sliding unit rotates in the same direction as the shaft portion along with the rotation of the shaft portion.Type: ApplicationFiled: February 24, 2022Publication date: July 28, 2022Applicant: TERUMO KABUSHIKI KAISHAInventors: Yuki MASUBUCHI, Masaomi IMAI, Takashi KITAOKA, Takahiro CHIDA, Kazuaki KANAMOTO, Yukitoshi KATO
-
Patent number: 11382651Abstract: A medical device and a treatment method are disclosed capable of breaking an object in a body lumen efficiently with a lower burden on body lumen tissues. A medical device is disclosed that is inserted into the body lumen so as to crush an object in the body lumen, the medical device including: an elongated shaft that is to be rotatably driven, and a deformable breaking member that is connected to the shaft so as to be rotatable and extends along the shaft. The breaking member has a first contact portion and a second contact portion. The first contact portion is located most outward in the radial direction of the breaking member in a state in which the breaking member is expanded radially outward. The second contact portion is located more outward in the radial direction of the breaking member than the first contact portion in a contracted state.Type: GrantFiled: February 13, 2019Date of Patent: July 12, 2022Assignee: TERUMO KABUSHIKI KAISHAInventors: Takashi Kitaoka, Masaomi Imai, Yuki Masubuchi, Takahiro Chida, Kazuaki Kanamoto, Hideki Fujimagari
-
Patent number: 11337724Abstract: A method and device handle having a slide assembly are disclosed for controlling rotational speed of a catheter assembly under various rotational loads. The method includes: driving a catheter assembly at a target rotational speed in a first direction; detecting an actual rotational speed of the catheter assembly in the first direction; comparing the target rotational speed and the actual rotational speed of the catheter assembly in the first direction; and stopping the driving of the catheter assembly in the first direction before a completion of predetermined number of rotations in the first direction when the actual rotational speed decreases a predetermined value over a predetermined time frame.Type: GrantFiled: March 15, 2019Date of Patent: May 24, 2022Assignee: TERUMO KABUSHIKI KAISHAInventors: Yuki Masubuchi, Steve Woodard, Mansour Saleki
-
Patent number: 11291467Abstract: A medical device for crushing an object in a body lumen, the medical device including: an elongated shaft portion rotatably driven; a crushing unit provided with bendable wire rods and rotatable together with the shaft portion; and a sliding unit fixed to each of end portion of the wire rods on at least one of a distal side of and a proximal side of the wire rods and is interlocked with the shaft portion so as to be slidable in an axial direction of the shaft portion. The shaft portion is provided with contact portions that come into contact with the sliding unit during rotation and limit relative rotation of the shaft portion and the sliding unit. After the sliding unit is attached to the contact portions, the sliding unit rotates in the same direction as the shaft portion along with the rotation of the shaft portion.Type: GrantFiled: September 7, 2018Date of Patent: April 5, 2022Assignee: TERUMO KABUSHIKI KAISHAInventors: Yuki Masubuchi, Masaomi Imai, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto, Yukitoshi Kato
-
Publication number: 20220039824Abstract: A device handle is disclosed for cutting substances inside a body lumen, the device handle includes a motor configured to impart a rotational force to a drive shaft assembly and a processor, wherein the processor is configured to: control a driving of the drive shaft at a target rotational speed in a first direction; detect an actual rotational speed of the drive shaft assembly in the first direction; compare the target rotational speed and the actual rotational speed of the drive shaft assembly in the first direction; and stop the driving of the drive shaft assembly in the first direction before a completion of predetermined number of rotations in the first direction when the actual rotational speed decreases a predetermined percentage over a predetermined time frame.Type: ApplicationFiled: October 22, 2021Publication date: February 10, 2022Applicant: TERUMO KABUSHIKI KAISHAInventors: Yuki MASUBUCHI, Steve Woodard, Mansour Saleki
-
Publication number: 20210401448Abstract: A method and device handle having a slide assembly are disclosed for controlling rotational speed of a catheter assembly under various rotational loads. The method includes setting a first current limit in a processor, activating the catheter assembly to rotate, calculating a current value in rotational period of a first current limit, updating a second current limit from the first current limit, and wherein the second current limit is lower than the first current limit.Type: ApplicationFiled: September 14, 2021Publication date: December 30, 2021Applicant: TERUMO KABUSHIKI KAISHAInventors: Yuki MASUBUCHI, Steve WOODARD, Mansour SALEKI
-
Publication number: 20210346041Abstract: A medical device to be inserted into a blood vessel for effectively removing an object flowing in a biological lumen while reducing the burden on the living body includes an elongated shaft portion, and an expansion portion which is an elastically deformable cylindrical body having a plurality of gaps and in which a proximal portion or a distal portion of the cylindrical body is interlocked with the shaft portion. The expansion portion has a ring-shaped or annular bent portion which protrudes toward a proximal side position radially outside the expansion portion in a bent state of being bent along an axial direction, and an axial length of a second portion from the bent portion to a proximal end of the expansion portion is shorter than an axial length of a first portion from the bent portion to the distal end of the expansion portion.Type: ApplicationFiled: July 22, 2021Publication date: November 11, 2021Applicant: TERUMO KABUSHIKI KAISHAInventors: Masaomi IMAI, Takahiro CHIDA, Yuki MASUBUCHI, Takashi KITAOKA, Kazuaki KANAMOTO
-
Patent number: 11096705Abstract: A medical device to be inserted into a blood vessel for effectively removing an object flowing in a biological lumen while reducing the burden on the living body includes an elongated shaft portion, and an expansion portion which is an elastically deformable cylindrical body having a plurality of gaps and in which a proximal portion or a distal portion of the cylindrical body is interlocked with the shaft portion. The expansion portion has a ring-shaped or annular bent portion which protrudes toward a proximal side position radially outside the expansion portion in a bent state of being bent along an axial direction, and an axial length of a second portion from the bent portion to a proximal end of the expansion portion is shorter than an axial length of a first portion from the bent portion to the distal end of the expansion portion.Type: GrantFiled: February 22, 2019Date of Patent: August 24, 2021Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Takahiro Chida, Yuki Masubuchi, Takashi Kitaoka, Kazuaki Kanamoto
-
Patent number: 11065020Abstract: A method for suctioning an object in a blood vessel, the method comprising: inserting an expansion portion connected to a shaft portion on a distal portion of the shaft portion into the blood vessel; expanding the expansion portion in the blood vessel; inserting a suction catheter along the shaft portion into the blood vessel; reciprocating at least the expansion portion or the suction catheter relative to each other along an axial axis of the shaft portion; and suctioning the object with the suction catheter.Type: GrantFiled: February 28, 2019Date of Patent: July 20, 2021Assignee: TERUMO KABUSHIKI KAISHAInventors: Takahiro Chida, Masaomi Imai, Yuki Masubuchi, Takashi Kitaoka, Kazuaki Kanamoto