US 10,117,670 B2Granted

Medical device and treatment method

AssigneeTerumo Kabushiki Kaisha

InventorsJunichi Kobayashi, Tomonori Hatta, Taiga Nakano

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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.

Claims20

Dependent claims

A treatment method for cutting substances inside a body lumen with a medical device, the medical device including a drive shaft, at least one strut, and a support portion, the drive shaft configured to be rotatable, the at least one strut configured to be rotatably connected to a distal side of the drive shaft, the at least one strut extending along a rotation axis and having a central portion that is expandable radially outward, and the support portion configured to be rotatably connected to the distal side of the drive shaft, the support portion having a mesh shape and a tubular shape including multiple gaps, at least a portion of the support portion being positioned on a radially inner side of the at least one strut and is expandable radially outward by a central portion in a direction extending along the rotation axis, the treatment method comprising:

inserting the at least one strut and the support portion which are in a contracted state into the body lumen;
expanding the at least one strut and the support portion, the expansion of the at least one strut and the support portion causing an outer peripheral surface of the at least one strut to be angled radially inwards towards a rotational direction of the drive shaft;
cutting the substances inside the body lumen by causing the drive shaft to rotate the at least one strut and the support portion;
contracting the at least one strut and the support portion;
and
removing the at least one strut and the support portion from the inside of the body lumen.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/931,623Filed 3 Nov 2015 · us provisional application
Priority: JP 2014-2241054 Nov 2014
Published: US 2016/0120570 A15 May 2016
Granted: 6 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

A61B 17/320758
Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions: with a rotating cutting…
A61B 17/320725
Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions: with radially expandable…
A61B 90/39
Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00,…
A61F 2/013
Filters implantable into blood vessels: distal protection devices, i.e. devices placed distally in combination with another endovascular…

Family

Application62/104,487Us provisional application · filed 16 Jan 2015
US 2016/0120570 A1Pre-grant publication · published 5 May 2016
US 10,117,670 B2This patent

From the US filing history. Foreign family members aren’t listed.

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