Stent for Placement in Body
AssigneeKaneka Corporation
InventorTakuji Nishide
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Abstract
Disclosed is an easy-to-manufacture stent for placement in a body having a coating layer composed of a polymer wherein separation or cracking of the coating layer due to expansion of the stent can be efficiently prevented. Specifically disclosed is a stent for placement in a body which comprises a coating layer composed of a polymer and an intermediate layer arranged between the coating layer and the surface of the stent and composed of a polymer having a higher weight average molecular weight than the polymer of the coating layer. The polymers are preferably biodegradable, and able to contain a medical agent.
Claims8
An almost tube-shaped stent for placement in body expandable toward outside in the radial direction of the tube, characterized by including a stent main body containing a material non-degradable in the body as its base stent material, a coating layer containing a first polymer and a medicine, and an intermediate layer containing a second polymer having a weight-average molecular weight higher than that of the first polymer between the coating layer and the stent main body surface, wherein, the coating layer and the intermediate layer are present on at least part of the stent main body surface.
Dependencies are inferred from the claim text.