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Title:
腸管内に埋設可能なプロテーゼ
Document Type and Number:
Japanese Patent JP4651943
Kind Code:
B2
Abstract:
A body insertable tubular stent includes discrete tubular segments in an alternating sequence of segments having high axial stiffness and segments having low axial stiffness. The lower axial stiffness segments are intended for placement along more severely curved regions of the body vessel, to provide a greater degree of stent conformity to the vessel. The more axially flexible segments can be provided by winding a metallic or polymeric strand at a higher pitch along such segments, thus to form a higher braid angle in a braided stent. In such cases the more axially flexible segments also exert a higher radial force when the stent is radially compressed. Alternatively, the stent can consist of multiple interbraided strands, with each strand incorporating a higher number of filaments (at least two) along axially stiff segments, and incorporating a lower number of filaments (at least one) along axially flexible segments. In another alternative version, the device is formed of one or more resilient strands, each strand including a biostable filament and a bioabsorbable filament, so that after implantation the radial force and axial stiffness gradually decrease in vivo.

Inventors:
Jonathan S. Stinson
Application Number:
JP2003557442A
Publication Date:
March 16, 2011
Filing Date:
January 03, 2003
Export Citation:
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Assignee:
BOSTON SCIENTIFIC SCIMED,INC.
International Classes:
A61F2/90; D04C1/06; A61F2/00
Domestic Patent References:
JP6036807B2
JP11197252A
Foreign References:
US5575818
US5383892
Attorney, Agent or Firm:
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Masakazu Aoyama