A method to manufacture a composition comprising platelet-rich plasma, an apparatus for centrifugation and a kit utilisable for actuating the method, the composition, and use of the composition

A collecting unit comprising:

• a first connector;
• a gelation container having a plurality of walls, wherein at least one of the walls is elastically deformable, so as to deform under the action of a compression force exerted thereon, wherein the first connector is coupled with the gelation container;
• a second connector for connecting a source of a gelling fluid to the gelation container;
• an air filter in communication with the gelation container;
• a polymeric scaffold manufactured with a biopolymer and arranged in the gelation container;
• and
• a polymeric sponge disposed in contact with the polymeric scaffold.