Sents having biodegradable layers

Sents having biodegradable layers

  • CN 104,784,762 A
  • Filed: 04/17/2008
  • Published: 07/22/2015
  • Est. Priority Date: 04/17/2007
  • Status: Active Application
First Claim
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1. prepare a method for coronary stent, described method comprises:

  • A. Support frame is provided;

    B. be deposited upon on described Support frame by many, to form described coronary stent;

    At least one of wherein said layer comprises can the polymer of bio-absorbable, the medicament of the upper form expected of at least one treatment and/or at least one active biological agent;

    Wherein respectively being deposited upon on described Support frame of described many layers is comprised the following steps;

    I. by the first hole, medicament and/or at least one active biological agent of the upper form expected of described at least one treatment is released in dry powder form;

    Ii forms the supercritical or nearly supercritical fluid solution that comprise at least one supercritical fluid solvent and at least one polymer, and under the condition being enough to the solid particle forming described polymer, by the second hole, release described supercritical or nearly supercritical fluid solution;

    Iii. by described polymer and medicament and/or active biological agent particle deposition to described framework, wherein between described framework and described polymer and medicament and/or active biological agent granule, maintain electromotive force, thus form described layer;

    WithIv., under the condition of the activity of the form and/or described biological preparation that do not change described medicament, described layer is sintered.

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