Patents by Inventor Kazuaki Kanamoto
Kazuaki Kanamoto 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: 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
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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
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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
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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
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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
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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
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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
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Patent number: 11534188Abstract: A medical device and a treatment method are disclosed that can be applied to body lumina with a wide range of inside diameters and can enhance a property for suction of a substance from the inside of a body lumen by restricting flow within the body lumen. The medical device includes an elongated shaft section; an expanding section that is an elastically deformable tubular body provided with a plurality of openings; a flexibly deformable tubular cover section that is coupled to an end portion on a proximal side of the expanding section, surrounds an outer periphery of the expanding section on the proximal side, but does not surround, and externally exposes, an outer periphery of the expanding section on a distal side; and a sheath capable of accommodating the expanding section and the cover section in a diameter-reduced state.Type: GrantFiled: December 14, 2017Date of Patent: December 27, 2022Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Yuuki Masubuchi, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
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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
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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
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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
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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
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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
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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
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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
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Publication number: 20210186674Abstract: 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: ApplicationFiled: March 8, 2021Publication date: June 24, 2021Inventors: Masaomi IMAI, Kazuaki KANAMOTO, Takashi KITAOKA, Yuki MASUBUCHI
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Publication number: 20200405346Abstract: 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: ApplicationFiled: September 10, 2020Publication date: December 31, 2020Applicant: TERUMO KABUSHIKI KAISHAInventors: Masaomi IMAI, Takashi KITAOKA, Kazuaki KANAMOTO, Yuki MASUBUCHI
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Publication number: 20200222076Abstract: 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: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicant: TERUMO KABUSHIKI KAISHAInventors: Takashi KITAOKA, Masaomi IMAI, Kazuaki KANAMOTO, Yuki MASUBUCHI
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Patent number: 10653433Abstract: Provided is a medical device designed to be inserted into a lumen of a living body, the medical device including: a long shaft part; and a cylindrical hollow body. The shaft part has a center axis at position which differs from a center axis of the hollow body on a cross section perpendicular to the center axis of the shaft part. The hollow body has a housing part extending along the center axis of the hollow body, the hollow body being a groove depressed from an outer peripheral surface to an inner peripheral surface or a slit penetrating from an outer peripheral surface to an inner peripheral surface. The shaft part is positioned between inner surfaces facing from the outer peripheral surface to the inner peripheral surface in such a way that at least a portion of the shaft part constitutes the slit or the groove of the housing part.Type: GrantFiled: February 22, 2017Date of Patent: May 19, 2020Assignee: TERUMO KABUSHIKI KAISHAInventors: Yuuki Masubuchi, Masaomi Imai, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
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Patent number: 10517619Abstract: A medical device designed to be inserted into a lumen of a living body so as to block a flow of fluid in the lumen of the living body. The medical device includes: a long shaft part; an expandable part; and a covering part. The expandable part is an elastically deformable cylindrical body, and the cylindrical body having a proximal part connected to the shaft part. The covering part takes on a cylindrical shape and is flexible and deformable independently of the expandable part, and the cylindrical shape has a proximal part connected to a proximal part of the expandable part or connected to the shaft part located at a proximal side with respect to the expandable part. The covering part defines a space in the radial direction between a distal side end part of the cylindrical shape and the expandable part.Type: GrantFiled: February 22, 2017Date of Patent: December 31, 2019Assignee: TERUMO KABUSHIKI KAISHAInventors: Masaomi Imai, Yuuki Masubuchi, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto