摘要:
The present invention relates to a method for preparing a neutralized matrix of non-antigenic collagenous material comprising the steps of: —a) preparing an acidic solution of non-antigenic collagenous material, —b) pouring the solution of a) into a mold in order to form a layer, —c) lyophilizing the layer of b) in order to obtain an acidic matrix of non-antigenic collagenous material, d) sterilizing the acidic matrix obtained in c) with ethylene oxide in order to obtain a neutralized matrix of non-antigenic collagenous material. The invention also relates to the matrices obtained and to surgical implants comprising such matrices.
摘要:
The present invention relates to an implant (10) comprising: -a substrate (1) the surface of which comprising oxidized cellulose, said oxidized cellulose having a degree of oxidation ranging from 0.0 to 1, and -a multilayer coating covering said substrate, said multilayer coating comprising at least a first layer (2) adjacent said substrate, said first layer being formed of chitosan, and a second layer (3) adjacent said first layer, said second layer being formed of oxidized cellulose having a degree of oxidation ranging from 0.5 to 1. The invention further relates to a method for preparing such an implant.
摘要:
Implants include a film layer containing cellulose secured to a surface of the porous layer that also contains cellulose, wherein the film layer is secured to the porous cellulose without the use of an adhesive.
摘要:
The present invention relates to a haemostatic patch comprising a porous layer based on oxidized cellulose and a neutralized film based on chitosan, said film comprising a free face and a face fixed on one of the faces of the porous layer, and to the method of preparing said patch comprising the following steps: —a°) preparing a porous layer based on oxidized cellulose, —b°) preparing a film based on chitosan starting from an acidic aqueous solution of chitosan, —c°) fixing the film obtained in b°) on one face of the porous layer, —d°) neutralizing the film obtained in b°), —where step c°) can be carried out before or after step d°), characterized in that: the neutralizing step d°) comprises treatment of said film with a neutralizing composition comprising at least ethanol and ammonium hydroxide (NH4OH).
摘要:
The present invention relates to a haemostatic patch comprising a porous layer based on oxidized cellulose and a neutralized film based on chitosan, said film comprising a free face and a face fixed on one of the faces of the porous layer, and to the method of preparing said patch comprising the following steps: —a°) preparing a porous layer based on oxidized cellulose, —b°) preparing a film based on chitosan starting from an acidic aqueous solution of chitosan, —c°) fixing the film obtained in b°) on one face of the porous layer, —d°) neutralizing the film obtained in b°), —where step c°) can be carried out before or after step d°), characterized in that: the neutralizing step d°) comprises treatment of said film with a neutralizing composition comprising at least ethanol and ammonium hydroxide (NH4OH).