A medical closure screen device for a separation of first and second tissue portions is provided, which includes a mesh screen comprising tubular vertical risers, vertical strands with barbed filaments, and horizontal spacers connecting the risers and strands in a grid-like configuration. An optional perimeter member partly surrounds the screen and can comprise a perimeter tube fluidically coupled with the vertical risers to form a tubing assembly. Various input/output devices can optionally be connected to the perimeter tube ends for irrigating and/or draining the separation according to methodologies of the present invention. Separation closure, irrigation and drainage methodologies are disclosed utilizing various combinations of closure screens, tubing, sutures, fluid transfer elements and gradient force sources. The use of mechanical forces associated with barbed strands for repositionably securing separated tissues together is disclosed. The use of same for eliminating or reducing the formation of subcutaneous voids or pockets, which can potentially form hematoma and seroma effects, is also disclosed. Further disclosed are alternative embodiment medical closure screen installation systems and methods.Linvention concerne un dispositif de paravent de fermeture médicale destiné à séparer une première partie tissulaire dune seconde partie tissulaire. Ce dispositif comprend un paravent en maillage comprenant des pris verticaux tubulaires, des fils simples verticaux dotés de filaments barbelés, et des espaceurs horizontaux reliés aux pris et aux fils simples dans une configuration de type grille. Un élément de périmètre optionnel entoure partiellement le paravent et peut comprendre un tube de périmètre fluidiquement relié aux pris verticaux pour former un assemblage de tubages. Des dispositifs dentrée/sortie variés peuvent éventuellement être reliés aux extrémités du tube de périmètre pour irriguer et/ou pour drainer la séparation selon les méthodologies de linventio
