Improved medical device with hydrophilic coating

Details Improved medical device with hydrophilic coating Improved medical device with hydrophilic coating

A - Human Necessities

61

L

A61L 29/14 (2006.01) A61L 29/08 (2006.01) A61L 31/10 (2006.01)

Patent

CA 2719168

A medical device is disclosed, comprising a substrate and a hydrophilic surface coating arranged on said substrate. The substrate has, on its surface coated with said hydrophilic surface coating, a surface texture with an arithmetical mean devia-tion of the surface profile (Ra) of at least 3µm and/or a profile section height difference (Rdc (1-99%)) of at least 18 µm. It has surprisingly been found that the increased surface roughness of the substrate provides significant improvements in e. water retention for the hydrophilic coating.

Le dispositif médical selon linvention comprend un substrat et un revêtement de surface hydrophile disposé sur ledit substrat. Le substrat porte, sur sa surface revêtue avec ledit revêtement de surface hydrophile, une texture de surface présentant un écart moyen arithmétique du profil de surface (Ra) d'au moins 3 µm et/ou une différence de hauteur de profil en coupe (Rdc (1-99 %)) d'au moins 18 µm. De manière étonnante, on a découvert que l'accroissement de la rugosité superficielle du substrat induit des améliorations significatives en termes de rétention d'eau pour le revêtement hydrophile.

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