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US 2025/0107815 A1Published application
Medical device
AssigneeTerumo Kabushiki Kaisha
InventorKosuke NISHIO
Life of this patent
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Abstract
A medical device includes an elongated drive shaft that rotates around a central axis, and an elongated outer tubular shaft disposed outside the drive shaft, in which an outer surface of a distal end of the drive shaft is covered with a distal end covering portion made of resin. The drive shaft is a tubular body in which a plurality of wires or wire rods is arranged and spirally coupled around the axis, and at least a part of the distal end covering portion enters an inside of the drive shaft from between the wire rods.
Claims20
A medical device positionable in a biological lumen, the medical device comprising:
- an elongated outer tubular shaft configured to be positioned in the biological lumen, the elongated outer tubular shaft having an inner surface surrounding an interior of the elongated outer tubular shaft;
- a rotatable elongated drive shaft positioned in the interior of the elongated outer tubular shaft so that a distal portion of the elongated outer tubular shaft surrounds and axially overlaps at least a distal portion of the rotatable elongated drive shaft, the rotatable elongated drive shaft being rotatable relative to the elongated outer tubular shaft, the rotatable elongated drive shaft having an outer surface;
- the elongated outer tubular shaft and the rotatable elongated drive shaft being configured so that during rotation of the rotatable elongated drive shaft relative to the elongated outer tubular shaft, the distal portion of the rotatable elongated drive shaft contacts the inner surface of the elongated outer tubular shaft;
- a distal end covering portion located at and covering the distal portion of the rotatable elongated drive shaft, the distal end covering portion being made of resin, the distal end covering portion having an outer surface;
- the distal end covering portion including a proximal end portion terminating at a proximal end of the distal end covering portion, the distal end covering portion also including a distal end portion terminating at a distal end of the distal end covering portion, the rotatable elongated drive shaft extending proximally beyond the proximal end of the distal end covering;
- and
- the outer surface of the distal end covering portion made of resin reducing friction at a time of the contact of the rotatable elongated drive shaft with the elongated outer tubular shaft during rotation of the rotatable elongated drive shaft relative to the elongated outer tubular shaft.
4 more elements
A medical device comprising:
- an elongated drive shaft having a longitudinally extending central axis and being rotatable around the central axis, the drive shaft having an outer surface and including a distal end portion;
- an elongated outer tubular shaft disposed outside the drive shaft;
- and
- the outer surface of the distal end of the elongated drive shaft being covered with a distal end covering portion made of resin.
1 more element
A method comprising:
- positioning an elongated outer tubular shaft in a biological lumen, the elongated outer tubular shaft having an inner surface surrounding an interior of the elongated outer tubular shaft in which is positioned an elongated drive shaft so that a distal portion of the elongated outer tubular shaft surrounds and axially overlaps at least a distal portion of the elongated drive shaft, the elongated drive shaft including a distal end covering portion located at and covering the distal portion of the elongated drive shaft, the distal end covering portion being made of resin and having an outer surface, the distal end covering portion including a proximal end portion terminating at a proximal end of the distal end covering portion, the distal end covering portion also including a distal end portion terminating at a distal end of the distal end covering portion, the elongated drive shaft extending proximally beyond the proximal end of the distal end covering portion;
- rotating the elongated drive shaft relative to the elongated outer tubular shaft while the elongated outer tubular shaft is positioned in the biological lumen and while the elongated drive shaft is positioned in the interior of the elongated outer tubular shaft;
- the rotating of the elongated drive shaft relative to the elongated outer tubular shaft resulting in the outer surface of the distal end covering portion made of the resin to contact the inner surface of the elongated outer tubular shaft;
- and
- the outer surface of the distal end covering portion made of resin reducing friction during the contact of the rotatable elongated drive shaft with the elongated outer tubular shaft while the elongated drive shaft is rotating relative to the elongated outer tubular shaft.
2 more elements
Dependencies are inferred from the claim text.