Patents by Inventor Taiga Nakano

Taiga Nakano 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: 20220401123
    Abstract: A medical device capable of safely cutting a lesion area with relatively high accuracy while supplying a liquid into a body and discharging a cut object. The medical device that removes an object in a body lumen includes: a rotatable drive shaft; a cutting portion fixed to a distal portion of the drive shaft and configured to cut the object; an outer tubular shaft configured to rotatably accommodate the drive shaft; and a handle, in which the outer tubular shaft includes a tubular inner layer and a tubular outer layer fixed to the inner layer and surrounding the inner layer, a first lumen is formed between the outer layer and the inner layer, a second lumen is formed between the inner layer and the drive shaft, and the outer tubular shaft is rotatable with respect to the handle.
    Type: Application
    Filed: August 23, 2022
    Publication date: December 22, 2022
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga NAKANO, Cang LAM, Kosuke NISHIO
  • Publication number: 20220323100
    Abstract: A medical device includes: a drive shaft that is rotatable; a drive unit that is connected to a proximal portion of the drive shaft and rotates the drive shaft; a housing that accommodates the proximal portion of the drive shaft; and a handle portion that accommodates the drive unit and the housing, in which the housing includes an accommodation portion that is provided therein, a shaft support that is disposed in the accommodation portion and has a lumen through which the proximal portion of the drive shaft is inserted, and an elastic body that is disposed between an outer peripheral surface of the shaft support and an inner peripheral surface of the accommodation portion, and since an outer diameter of the shaft support is smaller than an inner diameter of the accommodation portion, the shaft support is movable in the accommodation portion.
    Type: Application
    Filed: June 28, 2022
    Publication date: October 13, 2022
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga NAKANO, Kosuke NISHIO
  • Publication number: 20220313291
    Abstract: A priming instrument for a medical device, a medical device system, and a method for priming a medical device, which are capable of priming the medical device having a plurality of lumens that open in a living body. The medical device includes a liquid delivering lumen having a first opening portion and a discharge lumen having a second opening portion. The priming instrument includes an instrument body having a hollow portion that covers the first opening portion and the second opening portion of the medical device, the hollow portion includes a distal portion and a proximal portion, the distal portion of the hollow portion is closed, the proximal portion of the hollow portion has an insertion port into which the medical device is insertable, and the insertion port includes a sealing portion that seals an inside of the hollow portion when the medical device is inserted into the hollow portion.
    Type: Application
    Filed: June 17, 2022
    Publication date: October 6, 2022
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga NAKANO, Bao DAN
  • Publication number: 20220304722
    Abstract: A medical device that cuts an object in a body lumen includes: a drive shaft; a shaft portion connected to the drive shaft; a cutting portion connected to the shaft portion; and first and second bearings that rotatably support the shaft portion. The first bearing has a ring shape, the second bearing has a ring shape and is spaced from a proximal side of the first bearing. The shaft portion includes a first sliding portion slidably supported by the first bearing, a second sliding portion slidably supported by the second bearing, and an intermediate portion between the first and second sliding portions. The intermediate portion has a protruding portion protruding radially outward, the protruding portion is disposed between the first bearing (81) and the second bearing in an axial direction, and the shaft portion has a passage that communicates from the first sliding portion to the second sliding portion).
    Type: Application
    Filed: June 15, 2022
    Publication date: September 29, 2022
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga NAKANO, Kosuke NISHIO, Vivian TRAN, Dan BAO, Lam CANG
  • Patent number: 11419629
    Abstract: A medical device is disclosed for cutting substances inside a body lumen. The medical device includes: a drive shaft that is rotatable; at least one strut that is rotatably connected to a distal side of the drive shaft, the at least one strut extending along a rotation axis, and wherein a central portion of the at least one strut is bent so as to be expandable radially outwardly; and a support portion that is rotatably connected to the distal side of the drive shaft, and wherein the support portion is formed in a mesh shape and a tubular shape while including multiple gaps, at least a portion of which is positioned on a radially inside of the at least one strut, and which is expandable radially outwardly by a central portion in a direction extending along the rotation axis being bent.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 23, 2022
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Tomonori Hatta, Junichi Kobayashi, Taiga Nakano
  • Patent number: 11389191
    Abstract: A method is disclosed comprising: introducing a treatment member into a living body and positioning the treatment member adjacent substance in the living body to be ground; moving the treatment member in at least a clockwise direction or a counterclockwise direction about a central axis, which is different from an axis of rotation of the treatment member while the treatment member is positioned adjacent the substance to be ground in the living body to grind the substance; and shearing debris resulting from the grinding of the substance to reduce a size of the debris.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: July 19, 2022
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga Nakano, Junichi Kobayashi, Tomonori Hatta, Kosuke Nishio
  • Publication number: 20210322051
    Abstract: A treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device for cutting substances inside a body lumen including a rotatable tubular drive shaft; an expanding part connected to a distal side of the tubular drive shaft; a cutting part covering the expanding part; and an elongated tube extending through the tubular drive shaft and connected to the expanding part, wherein a distal end of the expanding part is placed distal to a distal end of the cutting part.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Tomonori HATTA, Junichi KOBAYASHI, Taiga NAKANO
  • Publication number: 20210322053
    Abstract: A treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device includes a drive shaft that is rotatable; a cutting unit configured to be rotatably connected to a distal side of the drive shaft; a filter device configured to be inserted in a contracted state, the filter device having an elongated shaft, which interlocks with a filter portion of the filter device; a distal tube, the distal tube being on a distal side of the cutting unit and configured to receive the elongated shaft of the filter device; and a housing on a proximal portion of the drive shaft, the housing including a first drive gear connected to the drive shaft, a second drive gear connected to a motor and meshing with the first drive gear, and a first partition wall arranged between the motor and the second drive gear.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Junichi KOBAYASHI, Tomonori HATTA, Taiga NAKANO
  • Publication number: 20210275210
    Abstract: A medical device for cutting an object in a body lumen includes: a tubular drive shaft; a cutting unit fixed to a distal portion of the drive shaft; a protective tubular main body accommodated in the drive shaft and the cutting unit and rotatable relative to the drive shaft; and a protective-side stopper disposed on an outer peripheral surface of a distal portion of the protective tubular main body. The distal portion of the drive shaft or the cutting unit has a drive-side stopper contactable with the protective-side stopper. By the protective-side stopper coming into contact with the drive-side stopper, the protective tubular main body is restrained from moving axially with respect to the drive shaft without being restrained from rotating relative to the drive shaft.
    Type: Application
    Filed: May 21, 2021
    Publication date: September 9, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kosuke NISHIO, Tomonori HATTA, Taiga NAKANO
  • Patent number: 11096715
    Abstract: A treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device for cutting substances inside a body lumen including a rotatable tubular drive shaft; an expanding part connected to a distal side of the drive shaft; a cutting part covering the expanding part; and an elongated tube extending through the drive shaft and connected to the expanding part, wherein a distal end of the expanding part is placed distal to a distal end of the cutting part.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: August 24, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Tomonori Hatta, Junichi Kobayashi, Taiga Nakano
  • Patent number: 11083559
    Abstract: A method is disclosed for collecting substances inside a living body lumen using a medical device having an elongated shaft, a filter portion, and a support portion. The method includes inserting the medical device into the living body lumen; inserting an atherectomy device through the elongated shaft of the medical device; scraping a substance with the atherectomy device; collecting the substance using the filter portion of the medical device; and aspirating the substance by an aspiration catheter while the aspiration catheter is moved forward and rearward relative to the filter portion inside the filter portion.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: August 10, 2021
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Junichi Kobayashi, Tomonori Hatta, Taiga Nakano
  • Patent number: 11083485
    Abstract: A treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device includes a drive shaft that is rotatable; a strut that is rotatably connected to a distal side of the drive shaft, that extends along a rotation axis, and whose central portion is expandable radially outward; and a support portion that is rotatably connected to the distal side of the drive shaft, that is formed in a mesh shape and a tubular shape while including multiple gaps, at least a portion of which is positioned on a radially inner side of the strut, and that is expandable radially outward by a central portion in a direction extending along the rotation axis being bent.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 10, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Junichi Kobayashi, Tomonori Hatta, Taiga Nakano
  • Publication number: 20210100580
    Abstract: A medical device is disclosed for cutting substances inside a body lumen. The medical device includes: a rotatable tubular drive shaft; a treatment member arranged on a distal side of the drive shaft; a device handle configured to locate the drive shaft; a guide cover located in the device handle and disposed to cover the drive shaft; an outer sheath disposed to cover the guide cover and located in a housing of the device handle; a first sealing member located proximal to a proximal end of the outer sheath and proximal to a fluid connection, the fluid connection configured to supply a saline solution into the outer sheath on the guide cover; and a drainage tube located proximal to the outer sheath and the first sealing member, the drainage tube being located in the housing of the device handle, and the drainage tube is fixed with respect to the housing.
    Type: Application
    Filed: December 17, 2020
    Publication date: April 8, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Taiga NAKANO
  • Patent number: 10966749
    Abstract: A treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device for cutting substances inside a body lumen, the medical device including a rotatable tubular drive shaft; a treatment member connected to a distal side of the drive shaft; an elongated tube extending through the drive shaft; and a bearing member connecting a distal side of the treatment member and the elongated tube.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: April 6, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Tomonori Hatta, Junichi Kobayashi, Taiga Nakano
  • Publication number: 20210093349
    Abstract: A medical device is disclosed which can be inserted into a biological lumen to effectively cut and remove an object. The medical device includes a drive shaft, a cutting portion fixed to a distal portion of the drive shaft, an outer tube that accommodates the drive shaft, and a handle unit disposed in a proximal portion of the drive shaft and the outer tube. The handle unit has an aspiration port. The aspiration port communicates with an aspiration lumen disposed between the outer tube and the drive shaft. The drive shaft has a first wire rod helically wound around an axis of the drive shaft. A helical winding direction of the first wire rod wound toward a proximal end direction of the drive shaft is a reverse direction of a rotation direction of the drive shaft. The first wire rod directly faces an inner peripheral surface of the outer tube.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 1, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kosuke NISHIO, Tomonori HATTA, Taiga NAKANO, Junichi KOBAYASHI
  • Patent number: 10959749
    Abstract: A medical device for removing a stenosis of a living body lumen includes a drive shaft configured to be driven by an operation at a proximal side thereof and including a treatment member disposed at a distal side thereof, a housing configured to accommodate the proximal side of the drive shaft therein, and a holding member configured to suppress unnecessary movement of the drive shaft. A proximal end of the holding member is fixed to the housing, and an inner surface of the holding member and an outer surface of the drive shaft are slidable relative to one another.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 30, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Tomonori Hatta, Junichi Kobayashi, Taiga Nakano
  • Patent number: 10905457
    Abstract: A medical device and a treatment method are disclosed for cutting substances inside a body lumen. The medical device includes a rotatable tubular drive shaft; an elongated tube extended through the drive shaft; a bearing placed at the proximal end of elongated tube; and a rotation transmitting member fixed on an outer surface of the elongated tube, wherein the rotation transmitting member is movable between a proximal end of the drive shaft and the bearing.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: February 2, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga Nakano, Tomonori Hatta, Junichi Kobayashi
  • Publication number: 20210022764
    Abstract: A medical device is disclosed for cutting substances inside a body lumen, the medical device including a rotatable tubular drive shaft; a treatment member arranged on a distal side of the drive shaft; and a device handle configured to retract the drive shaft, the device handle comprising: a fixed guide cover disposed to cover the drive shaft and an outer sheath disposed to cover the guide cover; and an annular gap between the outer sheath and the guide cover on a proximal side of a fluid connection configured to supply a physiological salt solution into the outer sheath.
    Type: Application
    Filed: October 27, 2016
    Publication date: January 28, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Taiga NAKANO
  • Patent number: 10898221
    Abstract: A medical device is disclosed for cutting substances inside a body lumen, the medical device including a rotatable tubular drive shaft; a treatment member arranged on a distal side of the drive shaft; and a device handle configured to retract the drive shaft, the device handle comprising: a fixed guide cover disposed to cover the drive shaft and an outer sheath disposed to cover the guide cover; and an annular gap between the outer sheath and the guide cover on a proximal side of a fluid connection configured to supply a physiological salt solution into the outer sheath.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: January 26, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventor: Taiga Nakano
  • Patent number: 10888350
    Abstract: A device handle is disclosed for grinding substances inside a body lumen, the device handle comprising: a high-speed drive source configured to rotate a treatment member connected to a distal end of a drive shaft; and a low-speed drive source connected to a revolution shaft, and wherein the revolution shaft is configured to cause the treatment member to move about a central axis of the revolution shaft, and wherein the central axis of a proximal portion of the revolution shaft is different from a central axis of the treatment member.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: January 12, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Taiga Nakano, Junichi Kobayashi, Tomonori Hatta, Kosuke Nishio