US 12,746,057 B2Granted

Medical device

AssigneeTerumo Kabushiki Kaisha

InventorYusuke Takahashi

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Abstract

A medical device includes an elongate shaft and an expansion body at a distal portion of the shaft portion. The shaft includes an outer tube, and an inner tube that is slidable inside the outer tube. The expansion body includes a first connecting portion connected to the outer tube, and a second connecting portion connected to the inner tube. The outer tube includes an open end where an opening portion is formed, and the inner tube enters/exits from the opening portion. The expansion body is settable to a reference form where the expansion body is radially widened, and is settable to a contracted form where the expansion body is radially contracted. In the reference form, the open end is between the first and second connecting portions, and when the expansion body is deformed from the reference form into the contracted form, the inner tube is extracted from the opening portion.

Claims23

Dependent claims

A medical device comprising:

an elongate shaft portion that extends in an axial direction from a distal portion of the shaft portion to a proximal portion of the shaft portion;
an expansion body configured to be outwardly expanded in a radial direction and inwardly contracted in the radial direction, the expansion body being located at the distal portion of the shaft portion;
the shaft portion including an outer tube, and an inner tube that is slidable in an axial direction inside the outer tube;
the expansion body including a first connecting portion connected to the outer tube, the expansion body also including a second connecting portion connected to the inner tube so that sliding movement of the inner tube in the axial direction results in movement of the second connecting portion of the expansions body in the axial direction;
the outer tube including an open end, the inner tube entering the outer tube by way of the open end and exiting from the outer tube by way of the open end;
the expansion body being positionable in a reference form in which the expansion body is widened in the radial direction in a natural state with no external force acting on the expansion body, and being positionable in a contracted form in which the expansion body is contracted in the radial direction so that the expansion body in the contracted form is radially contracted relative to the expansion body in the reference form, the first connecting portion and the second connecting portion being more axially separated from each other in the contracted form than in the reference form;
the open end of the outer tube being located between the first connecting portion and the second connecting portion when the expansion body is in the reference form, and a part of the inner tube moving from inside the outer tube to outside the outer tube by passing through the open end;
and
a distance in the axial direction from the first connecting portion to the open end being a first axial distance, a distance in the axial direction from the first connecting portion to the second connecting portion being a second axial direction, the first axial distance being 30%-80% of the second axial distance in the natural state with no external force acting on the expansion body.

6 more elements

A medical device comprising:

an elongate shaft portion;
the shaft portion including an outer tube, and an inner tube that is slidable in an axial direction inside the outer tube;
the outer tube including an open end, the inner tube entering the outer tube and exiting the outer tube by way of the open end;
the shaft portion being positionable in an accommodated form in which at least a part of the inner tube is accommodated inside the outer tube, and being positionable in an extended form in which the at least a part of the inner tube is moved from inside the outer tube to outside the outer tube by way of the open end;
the outer tube and/or the inner tube including a flexible portion having lower flexural rigidity than a portion immediately axially adjacent to the flexible portion;
the flexible portion being located in a first range in which the outer tube and the inner tube axially overlap each other when the shaft portion is in the accommodated form;
and
the flexible portion being located in a second range in which the outer tube and the inner tube do not axially overlap each other when the shaft portion is in the extended form.

5 more elements

A medical device comprising:

an elongate shaft portion;
the shaft portion including an outer tube, and an inner tube that is slidable in an axial direction inside the outer tube;
the outer tube including an open end, the inner tube entering the outer tube and exiting the outer tube by way of the open end;
the inner tube including a flexible portion having lower flexural rigidity than an adjacent portion of the inner tube that is immediately axially adjacent to the flexible portion;
an expansion body including a first connecting portion connected to the outer tube and a second connecting portion connected to the inner tube so that relative movement of the first and second connecting portions causes the expansion body to change between a reference form in which the expansion body is expanded radially outwardly with no external force acting on the expansion body and a contracted form in which the expansion body is contracted radially inwardly so that the expansion body in the contracted form is radially inwardly contracted relative to the expansion body in the reference form;
and
the shaft portion being configured so that:
i) at least a part of the flexible portion of the inner tube is accommodated in the outer tube when the expansion body is in the reference form with no external force acting on the expansion body;
and ii) the part of the flexible portion of the inner tube is positioned outside the outer tube and distal of the open end of the outer tube when the expansion body is in the contracted form, whereby the flexible portion is more easily bent when the when the expansion body is in the contracted form than when the expansion body is in the reference form.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/704,544Filed 25 Mar 2022 · continuation
Priority: JP 2019-17947730 Sep 2019
Published: US 2022/0211432 A17 Jul 2022
Granted: 29 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61B 17/11
Surgical instruments, devices or methods: for performing anastomosis; Buttons for anastomosis
A61B 18/1492
Probes or electrodes therefor: having a flexible, catheter-like structure, e.g. for heart ablation
A61B 2017/00247
Cardiac: making holes in the wall of the heart, e.g. laser Myocardial revascularization
A61B 2017/1139
For performing anastomosis; Buttons for anastomosis: side-to-side connections, e.g. shunt or X-connections