Patents by Inventor Masaomi Imai

Masaomi Imai 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: 20200405346
    Abstract: 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: Application
    Filed: September 10, 2020
    Publication date: December 31, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi IMAI, Takashi KITAOKA, Kazuaki KANAMOTO, Yuki MASUBUCHI
  • Publication number: 20200222076
    Abstract: 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: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takashi KITAOKA, Masaomi IMAI, Kazuaki KANAMOTO, Yuki MASUBUCHI
  • Patent number: 10653433
    Abstract: 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: Grant
    Filed: February 22, 2017
    Date of Patent: May 19, 2020
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Yuuki Masubuchi, Masaomi Imai, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
  • Patent number: 10517619
    Abstract: 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: Grant
    Filed: February 22, 2017
    Date of Patent: December 31, 2019
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Yuuki Masubuchi, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
  • Patent number: 10517618
    Abstract: A medical device to be inserted into a body lumen to obstruct flow in the body lumen includes a shaft unit; a proximal slider and a distal slider that are slidable along the shaft unit; a first expanding member including a distal portion coupled to the proximal slider and a proximal portion coupled to the shaft unit; a second expanding member including a distal portion coupled to the distal slider and a proximal portion coupled to the proximal slider; and a cover that surrounds an outer periphery of the first expanding member and coupled to the proximal portion of the first expanding member, the cover being tubular and flexibly deformable independently of the first expanding member.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: December 31, 2019
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Yuuki Masubuchi, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
  • Patent number: 10485929
    Abstract: A liquid administration device includes: a structure that includes: a cylindrical body including a bottom part in a distal portion and an opening in a proximal portion, a needle tube positioned in the distal portion of the cylindrical body, the needle tube having a sharp needle tip at a distal end, wherein a proximal end of the needle tube is communicable with an inside of the cylindrical body, and a gasket installed in the cylindrical body, the gasket being slidable in an axial direction of the cylindrical body; an operation member configured to perform a pressing operation by pressing the gasket such that a liquid is discharged from the needle tube; a pressing mechanism configured to generate a pressing force for pressing the gasket; and a pressing force transmission inhibiting mechanism configured to inhibit transmission of the pressing force to the gasket during the pressing operation.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: November 26, 2019
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Shigeaki Fuke, Masaomi Imai, Manabu Arinobe
  • Publication number: 20190192175
    Abstract: 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: Application
    Filed: February 28, 2019
    Publication date: June 27, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takahiro CHIDA, Masaomi IMAI, Yuki MASUBUCHI, Takashi KITAOKA, Kazuaki KANAMOTO
  • Publication number: 20190183519
    Abstract: 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: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Takahiro Chida, Yuki Masubuchi, Takashi Kitaoka, Kazuaki Kanamoto
  • Publication number: 20190175212
    Abstract: 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: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takashi KITAOKA, Masaomi Imai, Yuki Masubuchi, Takahiro Chida, Kazuaki Kanamoto, Hideki Fujimagari
  • Patent number: 10238815
    Abstract: A puncture assisting device includes a pair of plate-like pinching portions that face each other, and that are attached to each other so as to be openable and closeable; a biasing portion that biases the pair of pinching portions to be in a closed position; a pair of gripping portions configured to operate the pair of pinching portions to be in an open position; and a rod insertion portion that is disposed between the pair of pinching portions, the rod insertion portion being configured such that a rod portion of a syringe is insertable into the rod insertion portion to widen a gap between the pair of pinching portions.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: March 26, 2019
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Ruriko Iibuchi, Manabu Arinobe
  • Publication number: 20190000500
    Abstract: 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: Application
    Filed: September 7, 2018
    Publication date: January 3, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yuki Masubuchi, Masaomi Imai, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto, Yukitoshi Kato
  • Patent number: 10085760
    Abstract: The medical device disclosed here is configured to remove a plurality of objects at a time from an interior of a living body by restricting the objects from dropping out from an interior of a basket and is capable of treating objects in a body tissues having different structures efficiently with the same device. A treatment portion of a medical device includes an outer basket and an inner basket. A plurality of outer leg portions of the outer basket and a plurality of inner leg portions of the inner basket are arranged so as to be staggered in a circumferential direction. The medical device may be used by being switched between a mode of using only the outer basket and a mode of using both of the outer basket and the inner basket.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: October 2, 2018
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Yasuyuki Honma
  • Patent number: 10086152
    Abstract: A liquid administration device includes an operation unit; a structure that includes an accommodation body configured to accommodate the liquid therein and a needle tube communicatable with the inside of the accommodation body; a cover member that is movable between a protection position and an exposure position; a biasing member that biases the cover member in a distal direction; an exposure restriction unit configured to restrict movement of the cover member to the exposure position when a movement amount of the cover member with respect to the structure reaches a predetermined exposure restriction operation amount; and a movement amount restriction unit.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: October 2, 2018
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Masaomi Imai, Ruriko Iibuchi, Manabu Arinobe
  • Patent number: 9950124
    Abstract: A liquid administration device includes a structure that includes an accommodation body configured to accommodate liquid therein and a needle configured to communicate with an inside of the accommodation body; an operation unit configured to discharge the liquid inside the accommodation body from the needle by moving toward the structure in a distal direction; a cover member that is movable between a protection position at which the needle is covered and an exposure position at which the needle is exposed; a first biasing member that biases the operation unit toward the structure in the distal direction; and a second biasing member that biases the cover member in the distal direction. The operation unit has a first contact portion and the structure has a second contact portion, the contact portions being configured to come into contact with each other when the operation unit moves toward the structure in the distal direction.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: April 24, 2018
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Ruriko Iibuchi, Manabu Arinobe
  • Publication number: 20180103971
    Abstract: 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: Application
    Filed: December 14, 2017
    Publication date: April 19, 2018
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Yuuki Masubuchi, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto
  • Patent number: 9919107
    Abstract: A liquid administration device includes an inner structure that includes a cylindrical body that has a bottom part in a distal portion thereof and an opening portion in a proximal portion thereof, a needle tube that is mounted in the distal portion of the cylindrical body and has a sharp needle tip at a distal end and a proximal end of which is communicatable with an inside of the cylindrical body, and a gasket that is located in the cylindrical body; an operation member that includes a plunger, the operation member being configured to perform a pressing operation in which the plunger is moved relative to the cylindrical body in a distal direction while being pressed; an engagement portion that includes: a first engagement portion and a second engagement portion.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: March 20, 2018
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Shigeaki Fuke, Manabu Arinobe, Kenji Handa
  • Patent number: 9919109
    Abstract: A liquid administration tool includes a structure including a tubular body in which liquid is fillable, the tubular body having a bottom portion at a distal end and, an opening portion at a proximal end, and a needle tube positioned at a distal portion of the tubular body, the needle tube having a needle tip at a distal end thereof, and the needle tube being communicable at a proximal end thereof with an inside of the tubular body; an operation member having a pusher; a cover member; a biasing member configured to bias the cover member in the distal direction; a locking unit configured to restrict the movement of the cover member; and a movement amount restriction unit configured to restrict the movement amount of the cover member.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: March 20, 2018
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Manabu Arinobe, Masaomi Imai
  • Publication number: 20170238948
    Abstract: 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: Application
    Filed: February 22, 2017
    Publication date: August 24, 2017
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yuuki MASUBUCHI, Masaomi IMAI, Takashi KITAOKA, Takahiro CHIDA, Kazuaki KANAMOTO
  • Publication number: 20170238949
    Abstract: 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: Application
    Filed: February 22, 2017
    Publication date: August 24, 2017
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi IMAI, Yuuki MASUBUCHI, Takashi KITAOKA, Takahiro CHIDA, Kazuaki KANAMOTO
  • Publication number: 20170224364
    Abstract: A medical device to be inserted into a body lumen to obstruct flow in the body lumen includes a shaft unit; a proximal slider and a distal slider that are slidable along the shaft unit; a first expanding member including a distal portion coupled to the proximal slider and a proximal portion coupled to the shaft unit; a second expanding member including a distal portion coupled to the distal slider and a proximal portion coupled to the proximal slider; and a cover that surrounds an outer periphery of the first expanding member and coupled to the proximal portion of the first expanding member, the cover being tubular and flexibly deformable independently of the first expanding member.
    Type: Application
    Filed: February 9, 2017
    Publication date: August 10, 2017
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi IMAI, Yuuki MASUBUCHI, Takashi KITAOKA, Takahiro CHIDA, Kazuaki KANAMOTO