Physiological solution e.g. nutrient solution, perfusion device for use in e.g. hospital environment, has unit exerting pressure on pouch and comprising extension spring body that permits to exert constant force to squeezing drum and case

摘要

The device has a case (3) adapted to receive a deformable and removable flexible pouch (2) in which a physiological solution is contained, and a unit for exerting a pressure on the pouch to empty the pouch. The unit is constituted of a support surface (6) on which the pouch is disposed, a squeezing drum (5) adapted to pinch the pouch between the drum and the surface and an extension spring body (20). The body permits to exert a constant force to the drum and the case, which is wound partially on the drum and constitutes the surface.