https://www.reseau-naissance.fr/medias/2025/03/FicheProcedure-CVO-RSN-mars2025-1.pdf https://www.reseau-naissance.fr/medias/2025/03/FicheMemo-CVO-RSN-mars2025-1.pdf 2025 France scientific and technical information umbilicus catheterization vein, nos catheter, nos emergencies