Stent
AssigneeOlympus Optical Co., Ltd.
InventorsMasayuki Iwasaka, Hitoshi Ishikawa, Seiko Yunoki, Jun Iwami, Makoto Takahashi
Life of this patent
Estimating the term…
Abstract
A stent for dilating an internal lumen includes tubular segments that are arranged side by side in its axial direction. Each of segments expands and contracts in the diametrical direction of the stent, and its axial length is shorter than its expanded-state radius.
Claims21
A stent for dilating an internal lumen, comprising tubular segments capable of expanding and contracting in the radial direction thereof and having an axial length shorter than the expanded-state radius thereof, the segments being arranged side by side from a distal side to a proximal side in the axial direction of the stent.
A stent for dilating an internal lumen, comprising:
- tubular segments having an expanding force in the diametrical direction of the stent and having an axial length shorter than the diametrically-expanded-state radius thereof, the segments being arranged side by side in the axial direction of the stent;
- and
- a tubular filmy member capable of expanding in the axial direction thereof, the filmy member being attached to the segments so as to cover the same.
A recovery method for recovering a stent in a dilated state, indwelled in a detention portion in an internal lumen, comprising:
- inserting an intracoelomic observation system, having a channel and capable of observing the interior of a body cavity, into the body cavity;
- guiding a device having a holding mechanism through the channel of the intracoelomic observation system into the detention portion of the stent including tubular segments capable of expanding and contracting in the axial direction thereof and having an axial length shorter than the expanded-state radius thereof, the segments being arranged side by side from the distal side to the proximal side in the axial direction;
- holding that one of the segments of the stent located on the extreme distal side by means of the device passed through the segments;
- and
- pulling the device to the hand side to separate the segment on the extreme distal side while contracting the segment diametrically inward, and turning the stent inside out as the distal-side segment is passed through the interior of the successively adjacent segments on the proximal side, thereby separating and recovering the stent.
Dependencies are inferred from the claim text.